speaker

Abstract

This utility model provides a loudspeaker, relating to the field of electroacoustic technology. The loudspeaker includes a vibration component, which includes a voice coil, a first diaphragm, a second diaphragm, and a frame assembly. The second diaphragm is arranged around and spaced apart from the outer periphery of the first diaphragm. The frame assembly includes a first frame and a second frame. One side of the voice coil is connected to the first diaphragm through the first frame, and the other opposite side of the voice coil is connected to the second diaphragm through the second frame. The voice coil drives the first diaphragm and the second diaphragm to vibrate simultaneously. The two diaphragms do not overlap along the axis of the second diaphragm and are staggered, releasing the vibration space of the diaphragms and increasing the vibration amplitude of the diaphragms to improve the low-frequency sound pressure level. The diaphragm is split into a first diaphragm and a second diaphragm. The split diaphragm design avoids the overall diaphragm from vibrating separately, making the high-frequency response clear and stable. The voice coil drives the two diaphragms simultaneously, and the two diaphragms are staggered and do not overlap, ensuring that the high and low frequencies of the loudspeaker are in phase and improving the overall acoustic performance.

Description

Technical Field

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

[0002] In recent years, with the rapid development of mobile internet technology and the smart mobile terminal industry, the number of mobile devices in use has continued to rise. Among them, mobile phones, as the most representative portable mobile terminals, have become indispensable tools in people's daily lives and work. To meet the widespread needs of multimedia application scenarios, miniature speakers, as key acoustic functional components, are widely used in various mobile terminal products. However, under current technological conditions, the design of miniature speakers faces many challenges. On the one hand, the requirements for acoustic performance of terminal products are constantly increasing; on the other hand, thinness and lightness have become the core demand of mobile terminal design. Existing conventional speakers cannot meet the requirements of thin and light structure while achieving high-performance acoustic performance. This contradiction has become a technical bottleneck restricting the further optimization and upgrading of terminal products. Utility Model Content

[0003] The purpose of this invention is to provide a loudspeaker that solves the technical problems existing in the prior art, achieving excellent acoustic performance while also being lightweight and thin.

[0004] To achieve the above objectives, the technical solution of this utility model embodiment is as follows: A loudspeaker includes a vibration assembly comprising a voice coil, a first diaphragm, a second diaphragm, and a frame assembly. The second diaphragm is disposed around and spaced apart from the outer periphery of the first diaphragm. The frame assembly includes a first frame and a second frame. One side of the voice coil is connected to the first diaphragm via the first frame, and the other opposite side of the voice coil is connected to the second diaphragm via the second frame. The voice coil is used to drive the first diaphragm and the second diaphragm to vibrate simultaneously.

[0005] Furthermore, Both the first frame and the second frame include a first connecting part and a second connecting part; The first connecting part is used to connect with the voice coil, and the second connecting part is used to connect with the diaphragm. The connection area of ​​the first connecting part connected with the voice coil is smaller than the connection area of ​​the second connecting part connected with the diaphragm.

[0006] Furthermore, The loudspeaker also includes a magnetic cover assembly, which includes a first magnetic cover with a through hole, a first diaphragm connected to the first magnetic cover and located inside the through hole of the first magnetic cover, and a second diaphragm surrounding the outer periphery of the first magnetic cover.

[0007] Furthermore, The magnetic shield assembly further includes a second magnetic shield. The first magnetic shield and the second magnetic shield are spaced apart and arranged in parallel. The inner side of the second diaphragm is connected to the first magnetic shield, and the outer side of the second diaphragm is connected to the second magnetic shield. The first magnetic shield, the first diaphragm, the second magnetic shield, and the second diaphragm together form an accommodating cavity.

[0008] Furthermore, The vibration area of ​​the first diaphragm is smaller than that of the second diaphragm, and the first diaphragm is more focused on high-frequency vibration compared to the second diaphragm.

[0009] Furthermore, The ratio of the limiting amplitude of the first diaphragm to the limiting amplitude of the second diaphragm ranges from 0.8 to 1.2. The first diaphragm includes a first folded ring portion, and the limiting amplitude of the first diaphragm is... 2 =Arch length of the first fold 2 - Width of the first fold 2 ; The second diaphragm includes a second folded ring portion, and the limiting amplitude of the second diaphragm... 2 =Arch length of the second fold 2 - Width of the second fold 2 .

[0010] Furthermore, The plane containing the first diaphragm and the plane containing the second diaphragm are arranged parallel to each other.

[0011] Furthermore, The first diaphragm and the second diaphragm are located on the same plane.

[0012] Furthermore, The second diaphragm includes two second folded ring portions, which are arranged radially spaced along the second diaphragm.

[0013] Furthermore, The loudspeaker also includes a magnetic circuit assembly, which includes a first magnetic circuit sub-assembly and a second magnetic circuit sub-assembly. The first magnetic circuit sub-assembly is arranged around and spaced apart from the outer periphery of the second magnetic circuit sub-assembly, and a magnetic gap is formed between the first magnetic circuit sub-assembly and the second magnetic circuit sub-assembly.

[0014] Compared with the prior art, the embodiments of this utility model have at least the following technical effects: A loudspeaker according to one embodiment of this utility model includes a vibration assembly, which includes a voice coil, a first diaphragm, a second diaphragm, and a frame assembly. The second diaphragm is arranged around and spaced apart from the outer periphery of the first diaphragm. The frame assembly includes a first frame and a second frame. One side of the voice coil is connected to the first diaphragm through the first frame, and the other opposite side of the voice coil is connected to the second diaphragm through the second frame. The voice coil drives the first diaphragm and the second diaphragm to vibrate simultaneously. The two diaphragms are staggered along the axial direction of the second diaphragm and do not overlap. This structure can reduce the thickness of the housing, meet the requirements of thinner loudspeaker housings, and at the same time release the vibration space of the diaphragms, which can increase the vibration amplitude of the diaphragms and improve the sound pressure level in the low-frequency range. Moreover, by splitting the diaphragm into a first diaphragm and a second diaphragm, the vibration area of ​​each sub-diaphragm is reduced. That is, the split diaphragm design avoids the problem of the whole diaphragm vibrating separately, effectively avoiding the problem of the whole diaphragm vibrating separately, making the loudspeaker's high-frequency response clearer and more stable, and its bandwidth performance higher. In addition, the single voice coil drives two diaphragms, and the two diaphragms are staggered, which ensures the phase consistency of the high and low frequencies of the speaker, further improving the speaker's sound clarity and overall acoustic performance. Attached Figure Description

[0015] Figure 1 for Figure 3 Sectional view along the middle AA direction; Figure 2 A cross-sectional view from another angle of one embodiment of the loudspeaker; Figure 3 This is a top view of one embodiment of a loudspeaker; Figure 4 for Figure 1 A magnified view of a portion of the image.

[0016] Explanation of icon numbers: 10. Magnetic shield assembly; 11. First magnetic shield; 110. Through hole; 12. Second magnetic shield; 20. Vibrating assembly; 21. First diaphragm; 210. First surround portion; 22. Second diaphragm; 220. Second surround portion; 23. Frame assembly; 230. First frame; 2300. First connecting portion; 2301. Second connecting portion; 231. Second frame; 24. Voice coil; 30. Magnetic circuit assembly; 31. Magnetic gap; 32. First magnetic circuit subassembly; 320. Lower magnet; 321. Pole plate; 322. Upper magnet; 33. Second magnetic circuit subassembly; 40. Receptacle cavity; 50. Adapter parts. Detailed Implementation

[0017] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in this specification of this utility model is for the purpose of describing particular embodiments only and is not intended to limit the utility model. In the following description, the expression "some embodiments" refers to a subset of all possible embodiments; however, it should be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments and can be combined with each other without conflict.

[0018] It should also be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "inner," "outer," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0019] Please see Figure 1-3 As shown, in one embodiment of the present invention, the loudspeaker includes a vibration assembly 20, which includes a voice coil 24, a first diaphragm 21, a second diaphragm 22, and a frame assembly 23. The second diaphragm 22 is arranged around and spaced apart from the outer periphery of the first diaphragm 21. The frame assembly 23 includes a first frame 230 and a second frame 231. One side of the voice coil 24 is connected to the first diaphragm 21 through the first frame 230, and the other opposite side of the voice coil 24 is connected to the second diaphragm 22 through the second frame 231. The voice coil 24 is used to drive the first diaphragm 21 and the second diaphragm 22 to vibrate simultaneously.

[0020] In this embodiment, the second diaphragm 22 is arranged around and spaced apart from the outer periphery of the first diaphragm 21, and the two diaphragms are staggered. The second diaphragm 22 is positioned axially (as shown in the image below). Figure 1 The direction indicated by the middle arrow, Figure 1 This is a cross-sectional view of the speaker along direction AA, i.e. Figure 1(This is a sectional view of the speaker). The two diaphragms do not overlap, allowing for unrestricted vertical vibration. This structure reduces the speaker's housing thickness, meeting the demand for thinner and lighter housings. Furthermore, the staggered arrangement of the two diaphragms releases axial vibration space for the second diaphragm, increasing the vibration amplitude of both diaphragms and improving the sound pressure level in the low-frequency range. Moreover, separating the speaker diaphragm into a first and second diaphragm avoids the problem of fragmented vibration of the entire diaphragm, resulting in a clearer and more stable high-frequency response. Additionally, the voice coil simultaneously drives both diaphragms, and the staggered, non-overlapping arrangement ensures phase consistency between high and low frequencies, improving the overall acoustic performance of the speaker.

[0021] In this embodiment, the skeleton assembly 23 includes a first skeleton 230 and a second skeleton 231. One side of the voice coil 24 is connected to the first diaphragm 21 through the first skeleton 230, and the other opposite side of the voice coil 24 is connected to the second diaphragm 22 through the second skeleton 231. By setting the first skeleton 230 and the second skeleton 231, a single voice coil 24 can drive both the first diaphragm 21 and the second diaphragm 22 simultaneously, thereby improving the integration and driving efficiency of the structure.

[0022] For further optimizations, please refer to [link / reference]. Figure 1-3 As shown, in one embodiment of this utility model, both the first frame 230 and the second frame 231 include a first connecting portion 2300 and a second connecting portion 2301. The first connecting portion 2300 is used to connect with the voice coil 24, and the second connecting portion 2301 is used to connect with the diaphragm. The connection area of ​​the first connecting portion 2300 connected with the voice coil 24 is smaller than the connection area of ​​the second connecting portion 2301 connected with the diaphragm. In this embodiment, the connection area of ​​the first connecting portion 2300 of the frame is smaller than the connection area of ​​the second connecting portion 2301. Therefore, the weight of the frame can be reduced while ensuring the reliability of the connection, making the response more sensitive when the voice coil 24 drives the diaphragm to vibrate. It should be noted that in this embodiment, the frame, the diaphragm, and the voice coil 24 are connected by adhesive bonding. Of course, it is not limited to adhesive bonding. In other embodiments, it can be set according to specific circumstances. In addition, the frame material can be aluminum, aluminum alloy, polycarbonate (PC), or carbon fiber reinforced composite material, etc.

[0023] For further optimizations, please refer to [link / reference]. Figure 1-3As shown, in one embodiment of this utility model, the loudspeaker further includes a magnetic cover assembly 10. The magnetic cover assembly 10 includes a first magnetic cover 11, which has a through hole 110. A first diaphragm 21 is connected to the first magnetic cover 11 and located inside the through hole 110 of the first magnetic cover 11. A second diaphragm 22 is disposed around the outer periphery of the first magnetic cover 11. In this embodiment, since the first diaphragm 21 is located inside the through hole 110 and the second diaphragm 22 is disposed around the outer periphery of the first magnetic cover 11, the second diaphragm 22 can be disposed around and spaced apart from the outer periphery of the first diaphragm 21, resulting in a compact overall loudspeaker structure that meets the requirement of a thinner and lighter loudspeaker housing.

[0024] For more details, please refer to Figure 1-3 As shown, in one embodiment of this utility model, the magnetic cover assembly 10 further includes a second magnetic cover 12. The first magnetic cover 11 and the second magnetic cover 12 are spaced apart and arranged parallel to each other. The inner side of the second diaphragm 22 is connected to the first magnetic cover 11, and the outer side of the second diaphragm 22 is connected to the second magnetic cover 12. The first magnetic cover 11, the first diaphragm 21, the second magnetic cover 12, and the second diaphragm 22 enclose a receiving cavity 40. In this embodiment, the first magnetic cover 11, the first diaphragm 21, the second magnetic cover 12, and the second diaphragm 22 enclose a receiving cavity 40. The receiving cavity 40 is a sealed cavity that can isolate its interior from the external environment. For example, the loudspeaker also includes a magnetic circuit assembly 30, which is disposed inside the receiving cavity 40, thereby effectively preventing magnetic foreign objects such as iron filings from entering the magnetic gap of the magnetic circuit assembly 30 and improving the working reliability of the loudspeaker. It should be noted that in this embodiment, the first diaphragm 21 is bonded to the inner wall of the through hole 110 of the first magnetic cover 11, the inner side of the second diaphragm 22 is bonded to the first magnetic cover 11, and the outer side of the second diaphragm 22 is bonded to the second magnetic cover 12. The second magnetic cover 12 and the outer side of the second diaphragm 22 are indirectly connected through an adapter 50. By setting the adapter 50, the second magnetic cover 12 and the second diaphragm 22 are spaced apart and connected. Of course, it is not limited to being bonded. In other embodiments, it can be set according to the specific situation.

[0025] For further optimizations, please refer to [link / reference]. Figure 1-3As shown, in one embodiment of this utility model, the vibration area of ​​the first diaphragm 21 is smaller than that of the second diaphragm 22, and the first diaphragm 21 is more biased towards high-frequency vibration compared to the second diaphragm 22. In this embodiment, the vibration area of ​​the first diaphragm 21 is smaller than that of the second diaphragm 22, and the first diaphragm 21 is configured to be more biased towards high-frequency vibration compared to the second diaphragm 22. That is, the first diaphragm 21 is configured to be biased towards responding to high-frequency signals, while the second diaphragm 22 is configured to be biased towards responding to low-frequency signals. Therefore, the first diaphragm 21 has a smaller volume, higher rigidity, and lighter weight under the same material conditions. The first diaphragm 21 adopts a split small diaphragm design, which can effectively suppress the segmented vibration of the large diaphragm, broaden the bandwidth, and further improve the clarity and stability of the speaker's high-frequency response.

[0026] For further optimizations, please refer to [link / reference]. Figure 1-4 As shown, in one embodiment of this utility model, the ratio of the limiting amplitude of the first diaphragm 21 to the limiting amplitude of the second diaphragm 22 ranges from 0.8 to 1.2. The first diaphragm 21 includes a first folded ring portion 210, and the limiting amplitude of the first diaphragm 21... 2 =Arch length of the first folded section 210 2 - Width of the first folded portion 210 2 The second diaphragm 22 includes a second folded ring portion 220, and the limiting amplitude of the second diaphragm 22 is... 2 = Arc length of the second folded section 220 2 - Width of the second folded section 220 2 .like Figure 4 As shown, the width of the first folded ring portion 210 is W1, and the arc length of the first folded ring portion 210 is L1. The width of the second folded ring portion 220 is W2, and the arc length of the second folded ring portion 220 is L2. It should be noted that the folded ring width is the width spanned by the arc segment between the two ends of the folded ring, and the arc length is the arc length of the arc segment between the two ends of the folded ring. The arc segment between the two ends of the folded ring is the arc segment formed in the cross-sectional view of the speaker AA (e.g., Figure 4(As shown), of course, the arc-shaped segment between the two ends of the aforementioned folded ring is the arc-shaped state of the diaphragm in its static state. In this embodiment, the ratio of the limiting amplitude of the first diaphragm 21 to the limiting amplitude of the second diaphragm 22 is in the range of 0.8 to 1.2, that is, the compliance of the first diaphragm 21 and the second diaphragm 22 is matched. Through the aforementioned compliance matching between the first diaphragm 21 and the second diaphragm 22, it is ensured that the two diaphragms maintain the same maximum displacement under the same driving force, thereby avoiding the generation of phase difference and improving the clarity of the speaker sound and the overall acoustic performance. More specifically, in some embodiments, the material of the second diaphragm can be an elastomer such as a PEEK composite diaphragm, TPEE diaphragm, silicone diaphragm, or rubber diaphragm, with a Young's modulus > 2200 MPa, and the ratio of the thickness of the second diaphragm to the wall thickness of the voice coil is in the range of 0 to 2. The material of the first diaphragm can be a high elastic material such as PU, TPEE, silicone diaphragm, or rubber diaphragm, with a Young's modulus ≤2600MPa. The ratio of the thickness of the first diaphragm to the wall thickness of the voice coil is between 0 and 2, and can be selected and set according to specific circumstances.

[0027] For further optimizations, please refer to [link / reference]. Figure 1-3 As shown, in one embodiment of this utility model, the plane containing the first diaphragm 21 and the plane containing the second diaphragm 22 are arranged parallel to each other. Based on this, the overall structure of the speaker is compact, meeting the requirement for a thinner speaker housing. More specifically, the first diaphragm 21 and the second diaphragm 22 are located on the same plane. In this embodiment, the first diaphragm 21 and the second diaphragm 22 are coplanar. This arrangement helps to reduce the overall thickness of the speaker in the direction perpendicular to the diaphragm, thereby further providing structural support for the thinner design of mobile terminals (such as mobile phones). Of course, the foregoing embodiments are only optimized solutions and not limiting designs. In other embodiments, the first diaphragm 21 and the second diaphragm 22 are positioned along the axial direction of the second diaphragm 22 (e.g., the axial direction of the second diaphragm 22 is as follows). Figure 1 There may also be a certain height difference (in the direction indicated by the middle arrow), and the specific settings can be selected according to the situation.

[0028] For further optimizations, please refer to [link / reference]. Figure 1-3 As shown, in one embodiment of this utility model, the second diaphragm 22 includes two second folded ring portions 220, which are arranged radially spaced apart along the second diaphragm 22. In this embodiment, by providing two second folded ring portions 221 radially spaced along the second diaphragm 22, the two second folded ring portions 221 form a radial double-folded ring structure of the diaphragm. This radial double-folded ring structure allows the amplitude of the second diaphragm 22 to be increased, thereby improving the low-frequency sound pressure level of the loudspeaker.

[0029] For further optimizations, please refer to [link / reference]. Figure 1-3As shown, in one embodiment of this utility model, the loudspeaker further includes a magnetic circuit assembly 30, which includes a first magnetic circuit sub-assembly 32 and a second magnetic circuit sub-assembly 33. The first magnetic circuit sub-assembly 32 is arranged around and spaced apart from the outer periphery of the second magnetic circuit sub-assembly 33. A magnetic gap 31 is formed in the gap between the first magnetic circuit sub-assembly 32 and the second magnetic circuit sub-assembly 33. In this embodiment, through the above arrangement, a uniformly distributed and stable constant magnetic field is formed in the magnetic gap 31. The magnetic gap 31 formed by the two magnetic circuit sub-assemblies can accommodate the voice coil 24. The magnetic gap 31 provides an efficient and symmetrical driving force for the voice coil 24 to reliably drive the first diaphragm 21 and the second diaphragm 22 to vibrate.

[0030] For more details, please refer to Figure 1-3 As shown, in one embodiment of this utility model, both the first magnetic circuit component 32 and the second magnetic circuit component 33 include a lower magnet 320, a pole piece 321, and an upper magnet 322, which are stacked sequentially. In this embodiment, the lower magnet 320, the pole piece 321, and the upper magnet 322 are stacked sequentially to form a set of magnetic circuit components. The two sets of magnetic circuit components are spaced apart, and the first magnetic circuit component 32 is arranged around the outer periphery of the second magnetic circuit component 33. The annular gap between the two sets of magnetic circuit components forms the magnetic gap 31 of the magnetic circuit component 30, and the voice coil 24 is placed inside this magnetic gap 31. Thus, through the above-mentioned stacking and surrounding arrangement, the magnetic circuit component 30 can form a stronger and more uniform magnetic field within the magnetic gap 31. When the voice coil 24 vibrates up and down in the magnetic field, it experiences more balanced forces, thereby obtaining a higher BL value, which helps to enhance the control of the voice coil 24's movement and improve the transient response performance of the loudspeaker.

[0031] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. The protection scope of this utility model shall be determined by the protection scope of the claims.

Claims

1. A loudspeaker comprising a vibrating assembly (20), said vibrating assembly (20) including a voice coil (24), characterized in that, The vibration assembly (20) further includes a first diaphragm (21), a second diaphragm (22), and a skeleton assembly (23). The second diaphragm (22) is arranged around and spaced apart from the outer periphery of the first diaphragm (21). The skeleton assembly (23) includes a first skeleton (230) and a second skeleton (231). One side of the voice coil (24) is connected to the first diaphragm (21) through the first skeleton (230), and the other opposite side of the voice coil (24) is connected to the second diaphragm (22) through the second skeleton (231). The voice coil (24) is used to drive the first diaphragm (21) and the second diaphragm (22) to vibrate simultaneously.

2. The loudspeaker according to claim 1, characterized in that, The first frame (230) and the second frame (231) both include a first connecting part (2300) and a second connecting part (2301); The first connecting part (2300) is used to connect with the voice coil (24), and the second connecting part (2301) is used to connect with the diaphragm. The connection area of ​​the first connecting part (2300) connected with the voice coil (24) is smaller than the connection area of ​​the second connecting part (2301) connected with the diaphragm.

3. The loudspeaker according to claim 1, characterized in that, The loudspeaker also includes a magnetic cover assembly (10), which includes a first magnetic cover (11) having a through hole (110), a first diaphragm (21) connected to the first magnetic cover (11) and located inside the through hole (110), and a second diaphragm (22) surrounding the outer periphery of the first magnetic cover (11).

4. The loudspeaker according to claim 3, characterized in that, The magnetic shield assembly (10) further includes a second magnetic shield (12). The first magnetic shield (11) and the second magnetic shield (12) are spaced apart and arranged in parallel. The inner side of the second diaphragm (22) is connected to the first magnetic shield (11), and the outer side of the second diaphragm (22) is connected to the second magnetic shield (12). The first magnetic shield (11), the first diaphragm (21), the second magnetic shield (12) and the second diaphragm (22) enclose a cavity (40).

5. The loudspeaker according to claim 1, characterized in that, The vibration area of ​​the first diaphragm (21) is smaller than that of the second diaphragm (22). Compared with the second diaphragm (22), the first diaphragm (21) is more focused on high-frequency vibration.

6. The loudspeaker according to claim 1, characterized in that, The ratio of the limiting amplitude of the first diaphragm (21) to the limiting amplitude of the second diaphragm (22) ranges from 0.8 to 1.2; The first diaphragm (21) includes a first folded ring (210), and the limiting amplitude of the first diaphragm (21) is... 2 =Arch length of the first fold (210) 2 - Width of the first fold (210) 2 ; The second diaphragm (22) includes a second folded ring (220), and the limiting amplitude of the second diaphragm (22) is... 2 =Arch length of the second fold (220) 2 - Width of the second fold (220) 2 .

7. The loudspeaker according to claim 1, characterized in that, The plane containing the first diaphragm (21) and the plane containing the second diaphragm (22) are arranged parallel to each other.

8. The loudspeaker according to claim 7, characterized in that, The first diaphragm (21) and the second diaphragm (22) are located on the same plane.

9. The loudspeaker according to claim 1, characterized in that, The second diaphragm (22) includes two second folded ring portions (220), which are arranged radially apart along the second diaphragm (22).

10. The loudspeaker according to claim 1, characterized in that, The loudspeaker also includes a magnetic circuit assembly (30), which includes a first magnetic circuit sub-assembly (32) and a second magnetic circuit sub-assembly (33). The first magnetic circuit sub-assembly (32) is arranged around and spaced apart from the outer periphery of the second magnetic circuit sub-assembly (33), and a magnetic gap is formed between the first magnetic circuit sub-assembly (32) and the second magnetic circuit sub-assembly (33).

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