Loudspeaker module

Abstract

The utility model discloses a loudspeaker module, which comprises a module shell and a miniature loudspeaker monomer, and is characterized in that the module shell is provided with a mounting cavity, a front cavity and a sound outlet hole which are communicated in sequence; the miniature loudspeaker single body is mounted in the mounting cavity, the miniature loudspeaker single body comprises a basin frame, an annular magnetic structure, a central magnetic structure and a vibration assembly, and the annular magnetic structure is connected with the basin frame; the central magnetic structure comprises a lower washer, lower magnetic steel, a central washer and upper magnetic steel which are sequentially connected from bottom to top, the top of the upper magnetic steel extends into the front cavity and is fixedly connected with the module shell, and a vertically-through magnetic gap is formed between the lower magnetic steel and the annular magnetic structure; the vibration assembly comprises a diaphragm assembly and a voice coil which are connected, the diaphragm assembly is connected with the upper magnetic steel and 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 converters, in particular to a loudspeaker module. Background Art

[0002] Micro speakers are widely used in portable electronic devices such as mobile phones, laptops, and hearing aids. With the rapid development of these portable electronic devices, people have higher and higher requirements for the micro electroacoustic devices they carry. The micro speakers used are becoming more and more popular, such as large amplitude speakers or ultra-linear speakers.

[0003] However, as portable electronic devices become thinner and lighter, the thickness of speaker modules is getting smaller and smaller, and the corresponding performance is attenuated to a certain extent. The micro-speaker units in the speaker modules are getting thinner and thinner, resulting in a serious lack of space from the voice coil to the yoke in the micro-speaker units. During large-amplitude vibration, the voice coil may even collide with the yoke (commonly known as voice coil bottoming), which undoubtedly hinders the large-amplitude development of the micro-speaker units. If the voice coil is moved a certain distance away from the yoke, it will not only affect the performance of the micro-speaker units, but may also cause the voice coil to jump out of the magnetic gap, resulting in excessive distortion of the micro-speaker units and affecting the consumer experience. Utility Model Content

[0004] The technical problem solved by the utility model is to provide a high-performance loudspeaker module with no risk of bottoming out of the voice coil.

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

[0006] A module housing having an installation cavity, a front cavity, and a sound outlet hole that are sequentially connected;

[0007] A micro-speaker unit is installed in the installation cavity, and the micro-speaker unit includes

[0008] basin rack;

[0009] an annular magnetic structure connected to the basin frame;

[0010] a central magnetic structure, the central magnetic structure comprising a lower washer, a lower magnetic steel, a central washer, and an upper magnetic steel connected in sequence from bottom to top, the top of the upper magnetic steel extending into the front cavity and fixedly connected to the module housing, and a magnetic gap extending vertically through the lower magnetic steel and the annular magnetic structure;

[0011] A vibration component includes a connected diaphragm component and a voice coil, the diaphragm component is connected to the upper magnetic steel and the basin frame, and the voice coil is arranged corresponding to the magnetic gap.

[0012] In one embodiment, the diaphragm assembly includes a sound diaphragm, and the sound diaphragm includes an inner fixed part, an inner folding ring part, a connecting part, an outer folding ring part and an outer fixed part connected in sequence from the inside to the outside, the inner fixed part is connected to the upper magnetic steel, the outer fixed part is connected to the basin frame, and the voice coil is connected to the connecting part.

[0013] In one embodiment, the diaphragm assembly further includes an annular dome, which is connected to the connecting portion and is located on the top surface of the connecting portion; or, the annular dome is located on the bottom surface of the connecting portion, and the voice coil is connected to the connecting portion to indirectly connect the connecting portion.

[0014] In one embodiment, the inner fixing portion has a window, and an inner edge of the inner fixing portion is connected to the upper magnetic steel.

[0015] In one embodiment, the internal fixing portion has a hollow bulge protruding away from the lower washer, the top of the upper magnetic steel is located in the hollow bulge and fixedly connected to the inner surface of the hollow bulge, and the upper magnetic steel is indirectly connected to the module housing through the hollow bulge.

[0016] In one embodiment, the bottom of the upper magnetic steel has a skirt portion protruding outward.

[0017] In one embodiment, the upper magnetic steel includes a lower magnetic steel and an upper magnetic steel connected to each other, and a side of the lower magnetic steel away from the upper magnetic steel is connected to the center washer.

[0018] In one embodiment, the module housing has a positioning groove for positioning the top end of the upper magnetic steel, and the positioning groove is connected to the front cavity.

[0019] In one embodiment, the annular magnetic structure includes a yoke, side magnets and side washers connected in sequence from bottom to top, the basin frame is connected to the side washers and / or the side magnets, the yoke is arranged corresponding to the lower washer, and the side washer is arranged corresponding to the center washer.

[0020] In one embodiment, the installation cavity has an installation step that is in the shape of a ring frame as a whole. The installation step is used to install the basin frame, and the diaphragm assembly and / or the basin frame are connected to the installation step.

[0021] The beneficial effects of the present invention are:

[0022] This speaker module has a novel structure. In this speaker module, the magnetic gap of the micro-speaker unit is connected from top to bottom, and there is no yoke iron blocking the bottom of the voice coil. Therefore, even when the micro-speaker unit is working at a large amplitude, the voice coil will not hit the bottom, allowing the speaker module to achieve high performance.

[0023] The upper magnet not only increases the magnetic field strength of the micro speaker unit, further improving the performance of the speaker module, but also plays the role of fixing the central magnetic structure and the module shell, achieving multiple effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0025] Figure 1 This is a cross-sectional view of the speaker module of the first embodiment of the present invention. Figure 1 ;

[0026] Figure 2 This is a cross-sectional view of the speaker module of the first embodiment of the present invention. Figure 2 .

[0027] Description of Figure Numbers:

[0028] 10. Module housing; 101. Mounting step; 102. Front cavity; 103. Sound outlet; 104. Rear cavity; 105. Positioning slot;

[0029] 20. Micro speaker unit;

[0030] 1. Basin rack;

[0031] 2. Ring magnetic structure; 21. Yoke iron; 22. Side magnetic steel; 23. Side washer;

[0032] 3. Center magnetic structure; 31. Lower washer; 32. Lower magnetic steel; 33. Center washer; 34. Upper magnetic steel; 341. Skirt; 342. Lower magnetic steel; 343. Upper magnetic steel;

[0033] 4. Vibration assembly; 41. Sound diaphragm; 411. Inner fixing portion; 4111. Hollow convex hull; 412. Inner folding ring portion; 413. Connecting portion; 414. Outer folding ring portion; 415. Outer fixing portion; 42. Annular dome; 43. Voice coil; 5. Magnetic gap. DETAILED DESCRIPTION

[0034] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments.

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] It should be noted that if the embodiments of the present invention involve directional indications such as up, down, left, right, front, back, etc., then the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indications will also change accordingly.

[0037] In addition, if the embodiments of the present invention include descriptions of "first," "second," etc., 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 the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one of such features.

[0038] In addition, if the word "and / or" appears throughout the text, it means that three parallel solutions are included. For example, "and / or" includes solutions, or solutions, or solutions that meet all of the requirements simultaneously. In addition, the technical solutions of various embodiments may be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. If the combination of technical solutions is mutually contradictory or cannot be implemented, it shall be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0039] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0040] Example 1

[0041] Please refer to Figure 1 and Figure 2, embodiment 1 of the present invention is: a speaker module, including a module housing 10 and a micro speaker unit 20, the module housing 10 has an installation cavity, a front cavity 102 and a sound outlet 103 connected in sequence; the micro speaker unit 20 is installed in the installation cavity, and optionally, the module housing 10 also has a rear cavity 104 connected to the installation cavity, and the micro speaker unit 20 installed in the installation cavity separates the front cavity 102 and the rear cavity 104.

[0042] The micro-speaker unit 20 includes a basin 1, an annular magnetic structure 2, a central magnetic structure 3 and a vibration component 4, wherein the annular magnetic structure 2 is connected to the basin 1; the central magnetic structure 3 includes a lower washer 31, a lower magnetic steel 32, a central washer 33 and an upper magnetic steel 34 connected in sequence from bottom to top, the top of the upper magnetic steel 34 extends into the front cavity 102 and is fixedly connected to the module housing 10, and a magnetic gap 5 is formed between the lower magnetic steel 32 and the annular magnetic structure 2, and the bottom of the magnetic gap 5 is connected to the rear cavity 104; the vibration component 4 includes a connected diaphragm component and a voice coil 43, the diaphragm component is connected to the upper magnetic steel 34 and the basin 1, and the voice coil 43 is arranged corresponding to the magnetic gap 5.

[0043] The diaphragm assembly includes a sound diaphragm 41, and the sound diaphragm 41 includes an inner fixing part 411, an inner folding ring part 412, a connecting part 413, an outer folding ring part 414 and an outer fixing part 415 connected in sequence from the inside to the outside. The inner fixing part 411 is connected to the upper magnetic steel 34, the outer fixing part 415 is connected to the basin frame 1, and the voice coil 43 is connected to the connecting part 413.

[0044] In order to increase the rigidity of the diaphragm assembly and improve the acoustic performance of the speaker module, optionally, the diaphragm assembly also includes an annular dome 42, and the annular dome 42 is connected to the connecting part 413. In some embodiments, the annular dome 42 is located on the top surface of the connecting part 413, and the voice coil 43 is connected to the bottom surface of the connecting part 413; in this embodiment, the annular dome 42 is located on the bottom surface of the connecting part 413, and the voice coil 43 is connected to the connecting part 413 to indirectly connect to the connecting part 413.

[0045] In this embodiment, the inner fixing portion 411 has a hollow convex hump 4111 that protrudes away from the lower washer 31. The top of the upper magnetic steel 34 is located within the hollow convex hump 4111 and fixedly connected to the inner surface of the hollow convex hump 4111. The upper magnetic steel 34 is indirectly connected to the module housing 10 via the hollow convex hump 4111. In other embodiments, such as one embodiment, the inner fixing portion 411 has a window, and the inner edge of the inner fixing portion 411 is connected to the outer periphery of the upper magnetic steel 34. In this case, the top of the upper magnetic steel 34 is directly connected to the module housing 10.

[0046] In order to further enhance the magnetic field strength of the micro-speaker unit 20 , in this embodiment, the bottom of the upper magnetic steel 34 has a skirt portion 341 protruding outward.

[0047] Optionally, the upper magnetic steel 34 includes a connected lower magnetic steel 342 and an upper magnetic steel 343. The side of the lower magnetic steel 342 away from the upper magnetic steel 343 is connected to the center washer 33, and the skirt portion 341 is formed by an outward extension of the edge of the lower magnetic steel 342. In this embodiment, the upper magnetic steel 343 and the lower magnetic steel 342 are a separate structure connected by adhesive bonding. In other embodiments, the upper magnetic steel 343 and the lower magnetic steel 342 can also be a one-piece structure formed by integral processing.

[0048] In order to facilitate the positioning and installation of the central magnetic structure 3 and the module housing 10, and at the same time to greatly improve the magnetic field strength of the micro-speaker unit 20, in this embodiment, the module housing 10 has a positioning groove 105 for positioning the top of the upper magnetic steel 34, and the positioning groove 105 is connected to the front cavity 102.

[0049] In detail, the annular magnetic structure 2 includes a yoke 21, side magnetic steel 22 and side washer 23 connected in sequence from bottom to top, the basin frame 1 is connected to the side washer 23 and / or the side magnetic steel 22, the yoke 21 is set corresponding to the lower washer 31, and the side washer 23 is set corresponding to the center washer 33.

[0050] The installation cavity has an installation step 101 that is in the shape of a ring frame. The installation step 101 is used to install the basin frame 1. The diaphragm assembly and / or the basin frame 1 are connected to the installation step 101, and specifically can be connected by gluing.

[0051] The above are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the practical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A speaker module, characterized in that: include A module housing having an installation cavity, a front cavity, and a sound outlet hole that are sequentially connected; A micro-speaker unit is installed in the installation cavity, and the micro-speaker unit includes basin rack; an annular magnetic structure connected to the basin frame; a central magnetic structure, the central magnetic structure comprising a lower washer, a lower magnetic steel, a central washer, and an upper magnetic steel connected in sequence from bottom to top, the top of the upper magnetic steel extending into the front cavity and fixedly connected to the module housing, and a magnetic gap extending vertically through the lower magnetic steel and the annular magnetic structure; A vibration component includes a connected diaphragm component and a voice coil, the diaphragm component is connected to the upper magnetic steel and the basin frame, and the voice coil is arranged corresponding to the magnetic gap.

2. The speaker module according to claim 1, wherein: The diaphragm assembly includes a sound diaphragm, and the sound diaphragm includes an inner fixed part, an inner folding ring part, a connecting part, an outer folding ring part and an outer fixed part connected in sequence from the inside to the outside. The inner fixed part is connected to the upper magnetic steel, the outer fixed part is connected to the basin frame, and the voice coil is connected to the connecting part.

3. The speaker module according to claim 2, wherein: The diaphragm assembly further includes an annular dome, which is connected to the connecting portion and is located on the top surface of the connecting portion; alternatively, the annular dome is located on the bottom surface of the connecting portion, and the voice coil is connected to the connecting portion to indirectly connect the connecting portion.

4. The speaker module according to claim 2, wherein: The inner fixing portion has a window, and the inner edge of the inner fixing portion is connected to the upper magnetic steel.

5. The speaker module according to claim 2, wherein: The inner fixing portion has a hollow bulge protruding away from the lower washer, the top of the upper magnetic steel is located in the hollow bulge and fixedly connected to the inner surface of the hollow bulge, and the upper magnetic steel is indirectly connected to the module shell through the hollow bulge.

6. The speaker module according to claim 1, wherein: The bottom of the upper magnetic steel has a skirt portion protruding outward.

7. The speaker module according to claim 1, wherein: The upper magnetic steel includes a lower magnetic steel and an upper magnetic steel connected to each other, and a side of the lower magnetic steel away from the upper magnetic steel is connected to the center washer.

8. The speaker module according to claim 1, wherein: The module housing has a positioning groove for positioning the top end of the upper magnetic steel, and the positioning groove is connected to the front cavity.

9. The speaker module according to claim 1, wherein: The annular magnetic structure includes a yoke, side magnetic steel and side washer connected in sequence from bottom to top, the basin frame is connected to the side washer and / or the side magnetic steel, the yoke is arranged corresponding to the lower washer, and the side washer is arranged corresponding to the center washer.

10. The speaker module according to claim 1, wherein: The installation cavity has an installation step that is in the shape of a ring frame as a whole. The installation step is used to install the basin frame. The diaphragm assembly and / or the basin frame are connected to the installation step.

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