A micro speaker

Abstract

The application discloses a micro loudspeaker, which comprises a frame, a diaphragm assembly, a support, a yoke, a second magnetic structure, two voice coil groups and at least one second voice coil, each voice coil group comprises first voice coils arranged in an upper and lower interval mode; the support comprises two support plates and two connecting arms, the support plates are located between the two first voice coils of the voice coil group, and the top surface and the bottom surface of the support plate are provided with the first magnetic structure; the two ends of the connecting arm are connected with the two support plates respectively, and the connecting arm is connected with the diaphragm assembly; the second voice coil is connected with the diaphragm assembly and located between the two connecting arms; the yoke is provided with a turn-up, the turn-up is located between the two connecting arms; the second magnetic structure is arranged on the yoke and corresponds to the hollow region of the second voice coil, and the second magnetic structure is located between the two turn-ups. The micro loudspeaker has a novel structure, the moving iron and the moving coil are combined with the multi-magnetic circuit structure, the BL value of the micro loudspeaker is greatly improved, and the acoustic performance of the micro loudspeaker is enhanced.

Description

Technical Field

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

[0002] Currently, mobile devices such as smartphones and tablets enrich people's lives, and miniature speakers play an indispensable role as audio devices. At the same time, consumers' demand for sound loudness is increasing, and correspondingly, designers are also raising the performance requirements for miniature speakers.

[0003] In current technology, miniature loudspeakers are generally dynamic coil structures, while research on balanced armature loudspeakers is relatively limited. Moreover, current balanced armature loudspeakers typically use a single voice coil drive structure, which results in a lower black-white (BL) value and requires further improvement in acoustic performance. Summary of the Invention

[0004] The technical problem solved by this invention is to provide a miniature loudspeaker with excellent acoustic performance.

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

[0006] Sink stand;

[0007] Two voice coil groups are installed in the frame and are positioned far apart from each other. Each voice coil group includes a first voice coil that is spaced vertically apart.

[0008] Diaphragm assembly, the diaphragm assembly being connected to the top of the frame;

[0009] The support includes two support plates and two connecting arms. The two support plates correspond one-to-one with the two voice coil assemblies. The support plates are located between the two first voice coils of the voice coil assembly. The top and bottom surfaces of the support plates are provided with first magnetic structures. The two ends of the connecting arms are respectively connected to the two support plates. The connecting arms are connected to the diaphragm assembly. The two connecting arms are arranged far apart from each other.

[0010] At least one second voice coil, which is connected to the diaphragm assembly and located between the two connecting arms;

[0011] A yoke, which is connected to the bottom of the basin stand, has two opposing flanges, both of which are located between the two connecting arms;

[0012] The second magnetic structure is disposed on the yoke and is located in the hollow region corresponding to the second voice coil. The second magnetic structure is located between the two flanges.

[0013] The beneficial effects of this invention are as follows: This miniature speaker has a novel structure. The combination of the moving iron and the moving coil, along with the multi-magnetic circuit structure, significantly improves the BL value of the miniature speaker, enhances the bass sensitivity, and helps to improve the sound quality and listening experience of the miniature speaker, thereby enhancing its acoustic performance. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of the miniature loudspeaker according to Embodiment 1 of the present invention;

[0016] Figure 2 A cross-sectional view of the miniature loudspeaker according to Embodiment 1 of the present invention. Figure 1 ;

[0017] Figure 3 A cross-sectional view of the miniature loudspeaker according to Embodiment 1 of the present invention. Figure 2 ;

[0018] Figure 4 This is a schematic diagram of a portion of the structure of the miniature loudspeaker according to Embodiment 1 of the present invention;

[0019] Figure 5 This is a schematic diagram of the support structure in the miniature loudspeaker according to Embodiment 1 of the present invention.

[0020] Explanation of icon numbers:

[0021] 1. Sink stand; 11. Mounting unit;

[0022] 2. Diaphragm assembly;

[0023] 3. Support component; 31. Support plate; 32. Connecting arm; 321. First arm; 322. Second arm; 323. Third arm; 324. Fourth arm; 325. Fifth arm;

[0024] 4. Yoke; 41. Flanging;

[0025] 5. Second magnetic structure;

[0026] 6. Voice coil group; 61. First voice coil;

[0027] 7. Second voice coil;

[0028] 8. First magnetic structure;

[0029] 9. Third magnetic structure;

[0030] 10. Spiral. Detailed Implementation

[0031] The objectives, features, and advantages of this invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0033] It should be noted that if the embodiments of the present invention 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.

[0034] Furthermore, if the embodiments of the present invention 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 that feature.

[0035] 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 invention.

[0036] 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.

[0037] Example 1

[0038] Please refer to Figures 1 to 5 One embodiment of the present invention is a miniature speaker that can be used in electronic devices such as mobile phones, tablets, smartwatches, walkie-talkies, and hearing aids.

[0039] Please combine Figures 1 to 5 The miniature loudspeaker includes a frame 1, a diaphragm assembly 2, a support 3, a yoke 4, a second magnetic structure 5, two voice coil groups 6, and at least one second voice coil 7. Both voice coil groups 6 are mounted within the frame 1 and are positioned far apart from each other. Each voice coil group 6 includes two first voice coils 61 spaced vertically apart, meaning that the two first voice coils 61 in each voice coil group 6 form a gap in the height direction of the miniature loudspeaker. The diaphragm assembly 2 is connected to the top of the frame 1. The support 3 includes two support plates 31 and two connecting arms 32. The two support plates 31 correspond one-to-one with the two voice coil groups 6, and the support plates 31 are located at the two first voice coil groups 6. Between the coils 61, the top and bottom surfaces of the support plate 31 are provided with a first magnetic structure 8; the two ends of the connecting arm 32 are respectively connected to the two support plates 31, the connecting arm 32 is connected to the diaphragm assembly 2, and the two connecting arms 32 are arranged far apart from each other; the second voice coil 7 is connected to the diaphragm assembly 2 and is located between the two connecting arms 32; the yoke 4 is connected to the bottom of the frame 1, the yoke 4 has two flanges 41 arranged opposite to each other, and the two flanges 41 are both located between the two connecting arms 32; the second magnetic structure 5 is provided on the yoke 4 and is arranged corresponding to the hollow area of ​​the second voice coil 7, and the second magnetic structure 5 is located between the two flanges 41.

[0040] In a preferred embodiment, the support member 3 is made of a magnetically conductive material, for example, the same material as the yoke 4.

[0041] like Figure 3 As shown, it is easy to understand that the first magnetic structure 8 is positioned corresponding to the hollow region of the first voice coil 61. When the miniature loudspeaker is working, the first magnetic structure 8 moves within the hollow region of the first voice coil 61. The flange 41 and the second magnetic structure 5 form a magnetic circuit acting on the second voice coil 7.

[0042] Specifically, the first magnetic structure 8 includes a first magnet and a first washer, with the first magnet connecting the support plate 31 and the first washer. The second magnetic structure 5 includes a second magnet and a second washer, with the second magnet connecting the yoke 4 and the second washer.

[0043] Please combine Figures 2 to 4In this embodiment, there are two second voice coils 7 and two second magnetic structures 5. The two second voice coils 7 and the two second magnetic structures 5 are arranged in a one-to-one correspondence. The yoke 4 is also provided with a third magnetic structure 9. The third magnetic structure 9 is arranged in the gap between the two second voice coils 7. The third magnetic structure 9 includes a third magnet and a third washer. The third magnet connects the yoke 4 and the third washer.

[0044] It is easy to understand that in other embodiments, the number of the second voice coils 7 can be more. In this case, the number of the second magnetic structures 5 is equal to the number of the second voice coils 7 and they correspond one-to-one. The number of the third magnetic structures 9 is one less than the number of the second magnetic structures 5, and the third magnetic structures 9 are respectively provided between two adjacent second magnetic structures 5.

[0045] In addition, in some specific products, the third magnetic structure 9 can also be a magnetic conductor, which includes, but is not limited to, a bent edge formed by bending a portion of the yoke 4.

[0046] Optionally, the major axis of the first voice coil 61 is perpendicular to the major axis of the second voice coil 7.

[0047] Please combine Figures 2 to 5 In detail, the connecting arm 32 includes a first arm 321, a second arm 322, a third arm 323, a fourth arm 324, and a fifth arm 325 connected in sequence. The second arm 322 is perpendicular to the first arm 321 and the third arm 323, the third arm 323 is parallel to the first arm 321 and the fifth arm 325, and the fourth arm 324 is parallel to the second arm 322. The first arm 321 is connected to one of the support plates 31, the fifth arm 325 is connected to another support plate 31, and the third arm 323 is connected to the diaphragm assembly 2.

[0048] like Figure 5 As shown, to facilitate the processing and manufacturing of the support member 3, it is preferable that the support member 3 is an integral structure formed by one-piece processing.

[0049] like Figure 3As shown, to ensure stable installation and fixation of the first voice coil 61, the frame 1 has an inwardly protruding mounting portion 11. The mounting portion 11 is at least partially located between the two first voice coils 61 in the voice coil group 6, that is, the mounting portion 11 extends into the gap between the two first voice coils 61 in the voice coil group 6. In this case, at least one first voice coil 61 is connected and fixed to the mounting portion 11. Preferably, both first voice coils 61 are connected and fixed to the mounting portion 11. In some embodiments, the lower-layer first voice coil 61 can also be connected and fixed to the yoke 4. Furthermore, the mounting portion 11 also improves the structural strength of the frame 1 itself.

[0050] Please combine Figure 1 , Figure 2 and Figure 4 In a preferred embodiment, to improve the polarization of the miniature speaker and further enhance its acoustic performance, the miniature speaker in this embodiment further includes a spider 10, which is connected to the frame 1, the first arm 321, and the fifth arm 325. Specifically, there are two spiders 10, each corresponding to one of the two connecting arms 32. Optionally, the spider 10 is made of metal.

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

Claims

1. A micro speaker, characterized by: include Sink stand; Two voice coil groups are installed in the frame and are positioned far apart from each other. Each voice coil group includes a first voice coil that is spaced vertically apart. Diaphragm assembly, the diaphragm assembly being connected to the top of the frame; The support includes two support plates and two connecting arms. The two support plates correspond one-to-one with the two voice coil assemblies. The support plates are located between the two first voice coils of the voice coil assembly. The top and bottom surfaces of the support plates are provided with first magnetic structures. The two ends of the connecting arms are respectively connected to the two support plates. The connecting arms are connected to the diaphragm assembly. The two connecting arms are arranged far apart from each other. At least one second voice coil, which is connected to the diaphragm assembly and located between the two connecting arms; A yoke, which is connected to the bottom of the basin stand, has two opposing flanges, both of which are located between the two connecting arms; The second magnetic structure is disposed on the yoke and is located in the hollow region corresponding to the second voice coil. The second magnetic structure is located between the two flanges.

2. The micro speaker of claim 1, wherein: The first magnetic structure includes a first magnet and a first washer, wherein the first magnet connects the support plate and the first washer.

3. The miniature loudspeaker according to claim 1, characterized in that: The second magnetic structure includes a second magnet and a second washer, wherein the second magnet connects the yoke to the second washer.

4. The miniature loudspeaker according to claim 1, characterized in that: The number of second voice coils is two, the number of second magnetic structures is two, and the two second voice coils and the two second magnetic structures are arranged in a one-to-one correspondence. The yoke is also provided with a third magnetic structure, which is arranged in accordance with the gap between the two second voice coils.

5. The miniature loudspeaker according to claim 4, characterized in that: The major axis of the first voice coil is perpendicular to the major axis of the second voice coil.

6. The miniature loudspeaker according to claim 4, characterized in that: The third magnetic structure includes a third magnet and a third washer, wherein the third magnet connects the yoke and the third washer.

7. The miniature loudspeaker according to claim 1, characterized in that: The connecting arm includes a first arm, a second arm, a third arm, a fourth arm, and a fifth arm connected in sequence. The second arm is perpendicular to the first arm and the third arm, the third arm is parallel to the first arm and the fifth arm, the fourth arm is parallel to the second arm, the first arm is connected to a support plate, the fifth arm is connected to another support plate, and the third arm is connected to the diaphragm assembly.

8. The miniature loudspeaker according to claim 7, characterized in that: It also includes a spring, which is connected to the basin frame, the first arm and the fifth arm respectively.

9. The miniature loudspeaker according to claim 7, characterized in that: The support component is a one-piece structure that has been machined and formed in one piece.

10. The miniature loudspeaker according to claim 1, characterized in that: The frame has an inwardly protruding mounting portion, which is at least partially located between the two first voice coils in the voice coil assembly, and at least one of the first voice coils is connected and fixed to the mounting portion.

Images