Micro-speaker

Abstract

The utility model discloses a micro loudspeaker, including voice coil, rectification auxiliary film and a plurality of centering support piece, the centering support piece of multiple number symmetry distribution, the centering support piece has the inner fixed part of connection voice coil, and a part inner fixed part of centering support piece is equipped with the inner pad of communication with voice coil, rectification auxiliary film is connected with voice coil, and rectification auxiliary film is set corresponding to another part centering support piece. This micro loudspeaker adds rectification auxiliary film in the position corresponding to the centering support piece without inner pad, and rectification auxiliary film is additional mechanical load, and the equivalent mass when diaphragm vibrates will change, specifically, when diaphragm pushes air, rectification auxiliary film is passive vibration because of the air pressure change in cavity, forms reverse effect to diaphragm, thereby suppresses the amplitude of this side of voice coil, reduces the risk of voice coil rolling vibration and rubs, realizes the further rectification of voice coil, and in addition can also optimize sound pressure balance, improves the phenomenon of sound pressure asymmetry, is favorable to improve the acoustic performance of micro loudspeaker.

Description

Technical Field

[0001] This utility model relates to the field of electroacoustic converter technology, and in particular to a miniature loudspeaker. Background Technology

[0002] Miniature 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 increasingly higher requirements for the quality of the miniature speakers used in them.

[0003] In the industry, multiple centering supports are often used to correct the deviation of the voice coil in miniature loudspeakers, thereby improving the voice coil roll phenomenon and avoiding the friction noise caused by the voice coil colliding with other components. In some miniature loudspeakers, the centering supports also serve to conduct the voice coil to the external power supply. In this case, the centering support with pads has a larger area and an additional thicker layer at the pad position, so the total weight is higher than that of the centering support without pads. Therefore, when the miniature loudspeaker is working, the amplitude of the voice coil on the side connected to the centering support without pads will be greater than that on the side connected to the centering support with pads, forming a certain degree of polarization phenomenon and affecting the acoustic performance of the miniature loudspeaker. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a miniature loudspeaker with good acoustic performance.

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

[0006] Voice coil;

[0007] Multiple centering supports are symmetrically distributed. Each centering support has an inner fixing part that connects to the voice coil. Some of the inner fixing parts of the centering supports are provided with inner solder pads that are in communication with the voice coil.

[0008] A correction diaphragm is connected to the voice coil and is configured to correspond to another centering support.

[0009] In one embodiment, the correction diaphragm includes an inner mounting portion, a deformation portion, and an outer mounting portion connected in sequence, wherein the inner mounting portion is connected to the voice coil.

[0010] In one embodiment, the inner mounting portion is connected to the inner fixing portion to indirectly connect to the voice coil.

[0011] In one embodiment, the voice coil is rectangular, and the four corners of the voice coil are respectively provided with the centering support plate. The inner fixing part of the two centering support plates located on the same side of the voice coil is provided with the inner solder pad, and the other two centering support plates are respectively provided with the corresponding correction sub-diaphragm.

[0012] In one embodiment, the centering support further has a cantilever portion and an outer fixing portion, the cantilever portion being connected to the outer fixing portion and the inner fixing portion respectively, and the outer fixing portion of the centering support having the inner solder pad is provided with an outer solder pad that is in communication with the inner solder pad.

[0013] In one embodiment, at least two of the centering supports have their outer fixing portions connected by an outer connecting portion.

[0014] In one embodiment, the inner fixing portions of at least two of the centering supports are connected by an inner connecting portion.

[0015] In one embodiment, the device further includes a frame and a diaphragm assembly, wherein the outer fixing portion of the centering support and the diaphragm assembly are respectively connected to the frame, and the voice coil is connected to the diaphragm assembly.

[0016] In one embodiment, the diaphragm assembly includes a diaphragm, and the correction diaphragm may be made of the same or different material as the diaphragm.

[0017] In one embodiment, the inner and outer fixing parts of the centering support are respectively fixedly connected to the diaphragm assembly, and the correction sub-diaphragm is directly connected to the bottom of the voice coil.

[0018] The beneficial effects of this utility model are as follows: This miniature loudspeaker adds a correction diaphragm at the position corresponding to the centering support plate without an inner solder pad. As an additional mechanical load, the correction diaphragm changes the equivalent mass when the diaphragm vibrates. Specifically, when the diaphragm pushes the air, the correction diaphragm vibrates passively due to the change in air pressure inside the cavity, which has a reverse effect on the diaphragm, thereby suppressing the amplitude of the voice coil on that side, reducing the risk of voice coil rolling and rubbing, and achieving further correction of the voice coil. In addition, it can also optimize the sound pressure balance, improve the sound pressure asymmetry phenomenon, and help improve the acoustic performance of the miniature loudspeaker. Attached Figure Description

[0019] 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.

[0020] Figure 1 This is a schematic diagram of the structure of the miniature speaker in Embodiment 1 after the yoke is hidden;

[0021] Figure 2 This is a top view of a portion of the structure of the miniature loudspeaker in Embodiment 1.

[0022] Explanation of icon numbers:

[0023] 1. Pot stand;

[0024] 2. Diaphragm assembly;

[0025] 31. Central magnetic structure; 32. Side magnetic structure; 33. Magnetic gap; 34. Active region;

[0026] 4. Voice coil;

[0027] 5. Correction membrane; 51. Inner mounting section; 52. Deformation section; 53. Outer mounting section;

[0028] 6. Centering support; 61. Internal fixation part; 62. Cantilever part; 63. External fixation part; 64. Inner solder pad; 65. Outer solder pad; 66. External connection part. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] Furthermore, if the meaning of "and / or" in the entire text is to include three parallel solutions, taking "and A / or B" as an example, it includes solution A, solution B, and a solution that simultaneously satisfies both A and B. 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 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 claimed by this utility model.

[0034] 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.

[0035] Example 1

[0036] Please refer to Figure 1 and Figure 2 One embodiment of this utility model is a miniature loudspeaker, including a frame 1, a diaphragm assembly 2, a magnetic circuit assembly, a voice coil 4, a correction diaphragm 5, and multiple centering supports 6. The diaphragm assembly 2 and the magnetic circuit assembly are respectively connected to the frame 1, and the voice coil 4 is connected to the diaphragm assembly 2. The diaphragm assembly 2 includes a diaphragm and a dome connected to the diaphragm. The magnetic circuit assembly includes a yoke and a central magnetic structure 31 and a side magnetic structure 32 respectively disposed on the yoke. A magnetic gap 33 is formed between the central magnetic structure 31 and the side magnetic structure 32 for the voice coil 4 to move. The central magnetic structure 31 includes a central washer and a central magnet respectively connecting the central washer and the yoke. The side magnetic structure 32 includes a side washer and a side magnet respectively connecting the side washer and the yoke.

[0037] The centering support 6 has an inner fixing part 61 that connects to the voice coil 4. Multiple centering supports 6 are symmetrically distributed. Some of the inner fixing parts 61 of the centering supports 6 are provided with inner solder pads 64 that are conductive to the voice coil 4. The correction diaphragm 5 connects the voice coil 4 and the frame 1. The correction diaphragm 5 is provided corresponding to another portion of the centering supports 6. The correction diaphragm 5 may be made of the same or different material as the voice diaphragm. Specifically, the correction diaphragm 5 includes an inner mounting part 51, a deformation part 52, and an outer mounting part 53 connected in sequence. The inner mounting part 51 connects to the voice coil 4, and the outer mounting part 53 connects to the frame 1.

[0038] In one or more embodiments, the voice coil 4 is rectangular, with centering supports 6 corresponding to the four corners of the voice coil 4. The inner fixing portions 61 of the two centering supports 6 located on the same side of the voice coil 4 are provided with inner pads 64. The other two centering supports 6 each have a corresponding correction diaphragm 5, meaning there are two correction diaphragms 5. In other embodiments, the centering supports 6 may also be positioned corresponding to the long or short side of the voice coil 4.

[0039] In detail, in this embodiment, the four sides of the central magnetic structure 31 are respectively provided with the side magnetic structures 32, and the outer sides of the ends of two adjacent side magnetic structures 32 form an active area 34 for the centering support plate 6 to move. The active area 34 is connected to the magnetic gap 33.

[0040] To improve the structural stability of the miniature loudspeaker and facilitate its assembly and manufacturing, at least two of the outer fixing portions 63 of the centering support 6 are connected by an outer connecting portion 66, which is fixedly connected to the frame 1. In this embodiment, among the four centering supports 6, the outer fixing portions 63 of two centering supports 6 with inner solder pads 64 in their inner fixing portions 61 are connected by the outer connecting portion 66, and the outer fixing portions 63 of the other two centering supports 6 are connected by another outer connecting portion 66. Similarly, in other embodiments, at least two of the inner fixing portions 61 of the centering supports 6 are connected by an inner connecting portion, in which case the inner connecting portion is connected to the voice coil 4.

[0041] The centering support 6 also has a cantilever portion 62 and an outer fixing portion 63. The outer fixing portion 63 is connected to the basin frame 1. The cantilever portion 62 is connected to the outer fixing portion 63 and the inner fixing portion 61 respectively. The outer fixing portion 63 of the centering support 6, which has the inner solder pad 64, is provided with an outer solder pad 65 that is conductive to the inner solder pad 64.

[0042] In this embodiment, the centering support 6 is connected to the bottom of the voice coil 4, the inner mounting part 51 is connected to the inner fixing part 61 to indirectly connect to the voice coil 4, and the outer mounting part 53 is connected to the outer fixing part 63 to indirectly connect to the frame 1. In other embodiments, the centering support 6 may also be connected to the top of the voice coil 4. In this case, the inner fixing part 61 and the outer fixing part 63 of the centering support 6 are respectively fixedly connected to the diaphragm assembly 2, and the correction diaphragm 5 is directly connected to the bottom of the voice coil 4.

[0043] Viewing the micro-speaker along its thickness direction, the corrective diaphragm 5 is within the coverage area of ​​its corresponding centering support 6. The coverage area of ​​the centering support 6 refers to the area inside the micro-speaker that cannot be utilized by other components due to the presence of the centering support 6.

[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 inventive concept of this utility model and the contents of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A miniature loudspeaker, characterized in that: include Voice coil; Multiple centering supports are symmetrically distributed. Each centering support has an inner fixing part that connects to the voice coil. Some of the inner fixing parts of the centering supports are provided with inner solder pads that are in communication with the voice coil. A correction diaphragm is connected to the voice coil and is configured to correspond to another centering support.

2. The miniature loudspeaker according to claim 1, characterized in that: The correction diaphragm includes an inner mounting part, a deformation part, and an outer mounting part connected in sequence, and the inner mounting part is connected to the voice coil.

3. The miniature loudspeaker according to claim 2, characterized in that: The inner mounting part is connected to the inner fixing part to indirectly connect to the voice coil.

4. The miniature loudspeaker according to claim 1, characterized in that: The voice coil is rectangular, and the four corners of the voice coil are respectively provided with the centering support plate. The inner fixing part of the two centering support plates located on the same side of the voice coil is provided with the inner solder pad. The other two centering support plates are respectively provided with the corresponding correction sub-diaphragm.

5. The miniature loudspeaker according to claim 1, characterized in that: The centering support also has a cantilever portion and an outer fixing portion. The cantilever portion is connected to the outer fixing portion and the inner fixing portion respectively. The outer fixing portion of the centering support with the inner solder pad is provided with an outer solder pad that is in communication with the inner solder pad.

6. The miniature loudspeaker according to claim 5, characterized in that: At least two of the centering supports have their external fixing parts connected by external connecting parts.

7. The miniature loudspeaker according to claim 5, characterized in that: At least two of the centering supports have their internal fixing parts connected by an internal connecting part.

8. The miniature loudspeaker according to claim 5, characterized in that: It also includes a frame and a diaphragm assembly, wherein the outer fixing part of the centering support and the diaphragm assembly are respectively connected to the frame, and the voice coil is connected to the diaphragm assembly.

9. The miniature loudspeaker according to claim 8, characterized in that: The diaphragm assembly includes a diaphragm, and the correction diaphragm may be made of the same or different material as the diaphragm.

10. The miniature loudspeaker according to claim 8, characterized in that: The inner and outer fixing parts of the centering support are respectively fixedly connected to the diaphragm assembly, and the correction diaphragm is directly connected to the bottom of the voice coil.

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