Loudspeaker and electronic device

Abstract

The utility model discloses a loudspeaker and an electronic device, relates to loudspeaker structure technical field, the loudspeaker comprises a housing, and a magnetic circuit system and a vibration system connected with the housing, the magnetic circuit system has a magnetic gap, the vibration system comprises a first diaphragm, a voice coil, a middle diaphragm, a second diaphragm and a rigid connecting piece, the voice coil is connected with the first vibrating diaphragm, and at least part of the voice coil is arranged in the magnetic gap; the middle diaphragm is positioned on the second side of the first vibrating diaphragm; the inner peripheral side of the second vibrating diaphragm is connected with the voice coil; the rigid connecting piece is connected between the second vibrating diaphragm and the voice coil; wherein the shell comprises a first shell and a second shell; the first vibrating diaphragm and the middle diaphragm are fixed to the first shell, the magnetic circuit system is fixed to the second shell, the second vibrating diaphragm is clamped between the first shell and the second shell, and the second sound outlet hole is formed in the first shell. The utility model aims to provide the loudspeaker shell structure with small size and high performance.

Description

Technical Field

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

[0002] With the rapid development of the consumer electronics industry, people's requirements for electronic products are constantly increasing. In addition to the differences in the performance of the products themselves, portability and comfort are the key aspects that people pay attention to. At present, conventional speaker solutions cannot simultaneously meet multiple design requirements such as high performance and thinness. Moreover, when the design meets these requirements, how to use the inherent structure to improve the above effects is also a very important structural design aspect. Utility Model Content

[0003] The main objective of this invention is to provide a loudspeaker and electronic device, which aims to offer a small-sized, high-performance loudspeaker housing structure.

[0004] To achieve the above objectives, this utility model proposes a loudspeaker, wherein the loudspeaker includes a housing, a magnetic circuit system and a vibration system connected within the housing, the magnetic circuit system having a magnetic gap, and the vibration system comprising:

[0005] A first diaphragm has a first side and a second side in a first direction, the outer peripheral side of the first diaphragm is connected to the outer shell, and the first side of the first diaphragm is a first sound outlet space.

[0006] A voice coil is disposed on the second side of the first diaphragm and connected to the first diaphragm, and the voice coil is at least partially placed in the magnetic gap;

[0007] An intermediate diaphragm is arranged in a ring shape and located on the second side of the first diaphragm, and the outer peripheral side of the intermediate diaphragm is connected to the outer shell;

[0008] A second diaphragm, arranged in a ring shape and located on the side of the intermediate septum away from the first diaphragm, includes a second folded ring and a second vibrating plate. The outer periphery of the second folded ring is connected to the outer shell. The second vibrating plate includes a main body portion connecting the inner periphery of the second folded ring and a bent portion connecting the main body portion to the inner periphery of the intermediate septum. A second sound outlet cavity is defined between the intermediate septum and the second diaphragm. A second sound outlet hole is provided on the outer shell, and the second sound outlet hole communicates with the second sound outlet cavity.

[0009] A rigid connector is connected between the second diaphragm and the voice coil and is located at the end of the voice coil away from the first diaphragm;

[0010] The outer casing includes a first housing and a second housing disposed opposite to each other in a first direction;

[0011] The outer periphery of the first diaphragm and the outer periphery of the intermediate septum are both fixed to the first housing, the magnetic circuit system is fixed to the second housing, the outer periphery of the second diaphragm is sandwiched between the first housing and the second housing, and the second sound outlet is opened in the first housing.

[0012] In one embodiment, the first housing includes:

[0013] The main body is arranged in a ring shape; and,

[0014] The bent section is located at one end of the main body segment away from the second housing and extends toward the inside of the main body segment. The outer peripheral side of the first diaphragm and the outer peripheral side of the intermediate diaphragm are fixed to the end of the bent section away from the main body segment.

[0015] The second sound outlet is located in the main body section or the bent section.

[0016] In one embodiment, the second sound outlet is disposed on the main body section, and the outer peripheral side of the first diaphragm and the outer peripheral side of the intermediate septum are fixed to both sides of the end of the bent section away from the main body section, or the outer peripheral side of the intermediate septum is sandwiched between the outer peripheral side of the first diaphragm and the bent section; or,

[0017] The second sound outlet is located in the bent section. The first housing also includes a connecting frame connected to one end of the bent section away from the main body section. The outer peripheral side of the first diaphragm is connected to one end of the connecting frame, and the outer peripheral side of the intermediate diaphragm is connected to the other end of the connecting frame or the bent section.

[0018] In one embodiment, the intermediate diaphragm is a flexible element;

[0019] The effective vibration area of ​​the intermediate diaphragm is smaller than the effective vibration area of ​​the second diaphragm; and / or,

[0020] In the projection along the first direction, the width of the deformed portion of the intermediate septum is greater than or equal to the width of the deformed portion of the second fold; and / or,

[0021] The first diaphragm includes a first folded ring and a first vibrating plate. The outer edge of the first folded ring is connected to the outer shell, and the inner edge of the first folded ring is connected to the first vibrating plate. The compliance of the second folded ring and the compliance of the first folded ring are both less than the compliance of the intermediate septum.

[0022] In one embodiment, the magnetic circuit system includes:

[0023] Magnetic yoke;

[0024] A central magnet is disposed on the magnetic yoke; and,

[0025] An outer magnet is disposed on the magnetic yoke and located outside the central magnet, and the magnetic gap is defined between the outer magnet and the central magnet;

[0026] The outer magnet is provided with clearance holes for the rigid connector to pass through, and the magnetic yoke is provided with clearance grooves corresponding to the position of the rigid connector.

[0027] In one embodiment, the second housing is arranged in a ring shape and surrounds the magnetic yoke; or,

[0028] The second housing is a metal housing, and the magnetic yoke and the second housing are integrally formed; or,

[0029] The first housing and the second housing are metal housings, the magnetic yoke and the second housing are integrally formed, and the first housing and the second housing are welded together.

[0030] In one embodiment, the bent portion includes an inclined segment arranged at an angle to the first direction, the inclined segment being connected to the main body portion; and / or,

[0031] The outer periphery of the first diaphragm is provided with a first flange that connects to the first housing; and / or,

[0032] The outer periphery of the second diaphragm is provided with a second flange that is connected to the first housing.

[0033] In one embodiment, the deformable portion of the intermediate diaphragm protrudes toward the second diaphragm, the deformable portion of the second folded ring protrudes toward the first diaphragm, and the deformable portion of the intermediate folded ring and the deformable portion of the second folded ring are misaligned in a second direction, the second direction being perpendicular to the first direction.

[0034] In one embodiment, the first sound-emitting space is defined between the first housing and a first side of the first diaphragm; or,

[0035] The first housing is provided with an opening at one end corresponding to the first side of the first diaphragm.

[0036] This utility model also proposes an electronic device, wherein the electronic device includes:

[0037] The cavity has a sound outlet for electronic devices; and,

[0038] A loudspeaker includes a housing, a magnetic circuit system, and a vibration system disposed within the housing. The magnetic circuit system has a magnetic gap. The vibration system includes a first diaphragm, a voice coil, a middle septum, a second diaphragm, and a rigid connector. The first diaphragm has a first side and a second side in a first direction. The outer periphery of the first diaphragm is connected to the housing, and the first side of the first diaphragm forms a first sound outlet space. The voice coil is disposed on the second side of the first diaphragm and connected to the first diaphragm, and at least partially disposed within the magnetic gap. The middle septum is annularly arranged and located on the second side of the first diaphragm, and its outer periphery is connected to the housing. The second diaphragm is annularly arranged and located on the side of the middle septum away from the first diaphragm. The second diaphragm includes a second surround and a second diaphragm plate. The outer periphery of the second surround is connected to the housing, and the second diaphragm plate includes a main body connecting the inner periphery of the second surround and a bent portion connecting the main body to the inner periphery of the middle septum. A second diaphragm plate is defined between the middle septum and the second diaphragm. The speaker has a sound outlet cavity, and a second sound outlet hole is provided on the outer shell, which communicates with the second sound outlet cavity. The rigid connector is connected between the second diaphragm and the voice coil and is located at the end of the voice coil away from the first diaphragm. The outer shell includes a first housing and a second housing disposed opposite to each other in a first direction. The outer peripheral side of the first diaphragm and the outer peripheral side of the intermediate septum are both fixed to the first housing. The magnetic circuit system is fixed to the second housing. The outer peripheral side of the second diaphragm is sandwiched between the first housing and the second housing. The second sound outlet hole is provided in the first housing. The first sound outlet space and the second sound outlet cavity are both connected to the sound outlet hole of the electronic device. A first rear sound outlet cavity is defined between the first diaphragm and the intermediate septum. A second rear sound outlet cavity is defined on the side of the second diaphragm away from the intermediate septum. The first rear sound outlet cavity and the second rear sound outlet cavity are connected. The speaker has a rear sound outlet channel. The first rear sound outlet cavity and the second rear sound outlet cavity are connected to the cavity through the rear sound outlet channel. The effective volume of the cavity is ≥2.5cc.

[0039] In this invention, a middle septum and a second diaphragm are added to a conventional loudspeaker, and the middle septum and the second diaphragm define a second sound outlet cavity. The aim is to use the voice coil to drive the second diaphragm to vibrate, thereby changing the volume of the second sound outlet cavity and causing air to vibrate, thus producing sound. This allows the voice coil to drive the first diaphragm to vibrate the air in the first sound outlet space, and simultaneously drive the second diaphragm to vibrate the air in the second sound outlet cavity, increasing the effective vibration area of ​​the loudspeaker and improving its performance. Based on this, the outer casing includes a first housing and a second housing disposed opposite each other in a first direction; the outer periphery of the first diaphragm is fixed to the first housing, the magnetic circuit system is fixed to the second housing, the outer periphery of the second diaphragm is sandwiched between the first housing and the second housing, the outer periphery of the middle septum is fixed to the first housing, and the second sound outlet is opened in the first housing. The structure of the outer shell is mainly based on actual production and assembly needs. It can be composed of multiple shell components or a single-piece molded shell. In this application, the outer shell is decomposed into a first shell and a second shell. Specifically, the magnetic circuit system is fixed to the second shell, while the first diaphragm and the intermediate septum are fixed to the first shell. This also fixes the voice coil connected to the first diaphragm and the second diaphragm connected to the intermediate septum to the first shell. This facilitates the installation of the first diaphragm, the voice coil, the intermediate septum, and the second diaphragm within the first shell during assembly. It also facilitates the installation of the magnetic circuit system within the second shell. Finally, the first shell and the second shell are closed, and the second folding ring is clamped and fixed when the first shell and the second shell are closed, thus completing the assembly of the overall speaker structure and facilitating assembly operations. Furthermore, it is understood that the junction of the first shell and the second shell should be at the maximum size of the outer shell. This facilitates the closing of the first shell and the second shell and allows the second diaphragm to have the maximum size, thereby obtaining the largest effective vibration area to meet high-performance requirements. Meanwhile, the magnetic circuit system is disposed in the second housing, the first diaphragm, the intermediate septum, and the voice coil are disposed in the first housing, and the second diaphragm is sandwiched between the first housing and the second housing. With this configuration, when this structure is used for loudspeakers with different amplitude requirements of the second diaphragm, only the height of the first housing and the second housing needs to be adjusted, without the need to finely adjust the position of the mounting structure on the outer shell. That is, when adjusting the height of the two housings, the distance between the clamped second diaphragm and the intermediate septum can be adjusted to achieve different second diaphragm amplitudes, making it more applicable. Attached Figure Description

[0040] 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.

[0041] Figure 1 An exploded view of the first embodiment of the loudspeaker provided by this utility model;

[0042] Figure 2 for Figure 1 A cross-sectional schematic diagram of the loudspeaker;

[0043] Figure 3 for Figure 1 Another cross-sectional view of the loudspeaker;

[0044] Figure 4 for Figure 1 A schematic diagram of the planar structure of the loudspeaker in the image;

[0045] Figure 5 for Figure 1 Another planar structural diagram of the speaker in the image;

[0046] Figure 6 for Figure 1 A three-dimensional structural diagram of some of the components;

[0047] Figure 7 for Figure 1 An exploded view of the rigid connectors and elastic supports in the diagram;

[0048] Figure 8 for Figure 1 A schematic diagram of the assembly structure of the rigid connectors and elastic supports.

[0049] Figure 9 for Figure 1 A schematic planar structure diagram of an embodiment showing the relative positional relationship between the intermediate diaphragm, the second diaphragm, and the voice coil;

[0050] Figure 10 for Figure 9 A three-dimensional structural diagram of the intermediate septum in the middle;

[0051] Figure 11 for Figure 9 A three-dimensional structural diagram of the second vibrating plate in the diagram;

[0052] Figure 12 for Figure 1 A schematic diagram of a planar structure of another embodiment showing the relative positional relationship between the intermediate diaphragm, the second diaphragm, and the voice coil;

[0053] Figure 13 for Figure 12 A schematic diagram of the three-dimensional structure;

[0054] Figure 14 for Figure 13 An explosion diagram;

[0055] Figure 15 A cross-sectional schematic diagram of a second embodiment of the loudspeaker provided by this utility model;

[0056] Figure 16 for Figure 15 Another cross-sectional view of the speaker in the diagram;

[0057] Figure 17 A simplified cross-sectional view of the first embodiment of the electronic device provided by this utility model;

[0058] Figure 18 A cross-sectional schematic diagram of the third embodiment of the loudspeaker provided by this utility model;

[0059] Figure 19 A cross-sectional schematic diagram of the fourth embodiment of the loudspeaker provided by this utility model;

[0060] Figure 20 for Figure 19 Another cross-sectional view of the speaker in the diagram;

[0061] Figure 21 A simplified cross-sectional view of a second embodiment of the electronic device provided by this utility model.

[0062] Explanation of icon numbers:

[0063] 1000. Electronic device; 100. Loudspeaker; 1. Magnetic circuit system; 1a. Magnetic gap; 11. Central magnet; 111. Second protrusion; 12. Peripheral magnet; 121. Extension; 13. Clearance hole; 14. Magnetic yoke; 141. Clearance groove; 2. Vibration system; 21. First diaphragm; 211. First surround; 212. First diaphragm; 22. Voice coil; 221. First protrusion; 23. Intermediate septum; 231. Deformation section; 232. First extension; 24. Second diaphragm; 241. Second surround; 242. Second diaphragm; 2421. Main body; 2422. Bending section; 2422a. 2423, Inclined section; 25, Second extension; 3, Rigid connector; 3, Outer shell; 31, First shell; 311, Main body section; 312, Bending section; 313, Connecting frame; 32, Second shell; 4a, First sound outlet space; 4b, First rear sound outlet cavity; 5, First sound outlet hole; 6a, Second sound outlet cavity; 6b, Second rear sound outlet cavity; 7, Second sound outlet hole; 8, Elastic support member; 81, External fixing part; 811, First electrical connection part; 82, Internal fixing part; 821, Second electrical connection part; 83, Spring arm; 9, Connecting plate; 10, Shell cover; 101, Rear sound outlet channel; 200, Cavity; 201, Electronic device sound outlet hole.

[0064] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0065] 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 scope of protection of the present utility model.

[0066] 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. If the specific posture changes, the directional indicators will also change accordingly.

[0067] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these 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. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, 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 utility model.

[0068] With the rapid development of the consumer electronics industry, people's requirements for electronic products are constantly increasing. In addition to the differences in the performance of the products themselves, portability and comfort are the key aspects that people pay attention to. At present, conventional speaker solutions cannot simultaneously meet multiple design requirements such as high performance and thinness. Moreover, when the design meets these requirements, how to use the inherent structure to improve the above effects is also a very important structural design aspect.

[0069] In view of this, the present invention proposes a loudspeaker, please refer to [link / reference]. Figures 1 to 21 The following is a detailed description of the speaker proposed in this application, with reference to the specific accompanying drawings.

[0070] Please see Figures 1 to 4 as well as Figure 18The loudspeaker 100 includes a housing 3, a magnetic circuit system 1, and a vibration system 2 disposed within the housing 3. The magnetic circuit system 1 has a magnetic gap 1a. The vibration system 2 includes a first diaphragm 21, a voice coil 22, an intermediate diaphragm 23, a second diaphragm 24, and a rigid connector 25. The first diaphragm 21 has a first side and a second side in a first direction. The outer periphery of the first diaphragm 21 is connected to the housing 3, and the first side of the first diaphragm 21 is a first sound outlet space 4a. The voice coil 22 is disposed on the second side of the first diaphragm 21 and connected to the first diaphragm 21. The voice coil 22 is at least partially placed in the magnetic gap 1a. The intermediate diaphragm 23 is annularly arranged and located on the second side of the first diaphragm 21. The outer periphery of the intermediate diaphragm 23 is connected to the housing 3. The second diaphragm 24 is annularly arranged and located on the side of the intermediate diaphragm 23 away from the first diaphragm 21. The second diaphragm 24 includes a second folded ring 241 and a second diaphragm 242. The outer periphery of the ring 241 is connected to the outer shell 3. The second diaphragm 242 includes a main body 2411 connecting the inner periphery of the second folded ring 241 and a bent part 2412 connecting the inner periphery of the main body 2411 and the middle diaphragm. The middle diaphragm 23 and the second diaphragm 24 define a second sound outlet cavity 6a. The outer shell 3 is provided with a second sound outlet hole 7, which communicates with the second sound outlet cavity 6a. The rigid connector 25 is connected between the second diaphragm 24 and the voice coil 22 and is located at the end of the voice coil 22 away from the first diaphragm 21. The outer shell 3 includes a first shell 31 and a second shell 32 arranged opposite to each other in a first direction. The outer periphery of the first diaphragm 21 and the outer periphery of the middle diaphragm 23 are both fixed to the first shell 31. The magnetic circuit system 1 is fixed to the second shell 32. The outer periphery of the second diaphragm 24 is sandwiched between the first shell 31 and the second shell 32. The second sound outlet hole 7 is opened in the first shell 31.

[0071] In the technical solution of this utility model, a middle diaphragm 23 and a second diaphragm 24 are added to the conventional loudspeaker 100, and the middle diaphragm 23 and the second diaphragm 24 define a second sound outlet cavity 6a. The purpose is to drive the second diaphragm 24 to vibrate through the voice coil 22, thereby changing the volume of the second sound outlet cavity 6a, so as to drive the air to vibrate and produce sound. In this way, the voice coil 22 can drive the first diaphragm 21 to drive the air in the first sound outlet space 4a to vibrate, and at the same time drive the second diaphragm 24 to drive the air in the second sound outlet cavity 6a to vibrate, thereby increasing the effective vibration area of ​​the loudspeaker 100 and thus improving the performance of the loudspeaker 100. Based on this, the structure of the outer shell 3 is mainly determined by actual production and assembly requirements. It can be composed of multiple shell components or a single-piece molded shell. In this embodiment, the outer shell 3 is decomposed into a first shell 31 and a second shell 32. Specifically, the magnetic circuit system 1 is fixed to the second shell 32, while the first diaphragm 21 and the intermediate septum 23 are fixed to the first shell 31. This allows the voice coil 22 connected to the first diaphragm 21 and the second diaphragm 24 connected to the intermediate septum 23 to also be fixed to the first shell 31. In this way, during the assembly and production process, it is convenient to install the first diaphragm 21, the voice coil 22, the intermediate septum 23, and the second diaphragm 24 in the first shell 31, and at the same time, it is convenient to install the magnetic circuit system 1 in the second shell 32. Finally, the first shell 31 and the second shell 32 are closed, and the second folding ring 241 is clamped and fixed when the first shell 31 and the second shell 32 are closed, thus completing the assembly of the overall structure of the speaker 100 and facilitating the assembly operation. In addition, it is understood that the junction of the first housing 31 and the second housing 32 should be at the maximum size of the outer shell 3. This facilitates the sealing of the first housing 31 and the second housing 32, and also allows the second diaphragm 24 to have the maximum size, thereby obtaining the largest effective vibration area to meet high performance requirements. Simultaneously, the magnetic circuit system 1 is disposed in the second housing 32, the first diaphragm 21, the intermediate septum 23, and the voice coil 22 are disposed in the first housing 31, and the second diaphragm 24 is sandwiched between the first housing 31 and the second housing 32. With this configuration, when this structure is used for loudspeakers 100 with different amplitude requirements for the second diaphragm 24, only the height of the first housing 31 and the second housing 32 needs to be adjusted, without needing to fine-tune the mounting points on the outer shell 3. That is, by adjusting their heights, the distance between the sandwiched second diaphragm 24 and the intermediate septum 23 can be adjusted to achieve different amplitudes of the second diaphragm 24, making it more versatile. It is understood that the rigid connector 25 is made of stainless steel or other metal materials, or high-strength polymer materials such as carbon fiber.

[0072] Specifically, the voice coil 22 is disposed in the magnetic gap 1a, allowing it to vibrate under electrical control. The voice coil 22 is designed to connect with both the first diaphragm 21 and the second diaphragm 24, so that when the voice coil 22 vibrates, it can simultaneously drive both the first diaphragm 21 and the second diaphragm 24 to vibrate, forming a dual-diaphragm structure of the vibration system 2. The first diaphragm 21 emits sound through the first sound outlet space 4a, and the second diaphragm 24 emits sound through the second sound outlet cavity 6a, both sharing a single rear sound outlet cavity. This effectively increases the effective vibration area of ​​the vibration system 2, resulting in better acoustic performance for the speaker 100 of the same size. Furthermore, based on the same acoustic performance, the speaker 100 structure proposed in this application can have a smaller structural size, thus obtaining the small-sized, high-performance speaker 100 proposed in this application, meeting the requirements. The intermediate diaphragm 23, which is also connected to the voice coil 22, has been described above and will not be repeated here.

[0073] It is understood that this application sets the second diaphragm 24 as a combination of the second folded ring 241 and the second diaphragm plate 242, and sets the second diaphragm plate 242 as having a bent portion 2422 to extend toward the intermediate septum 23 and connect to the inner circumferential side of the intermediate septum 23. On the one hand, the second diaphragm plate 242 can serve as a connecting seal between the intermediate septum 23 and the second diaphragm 24, defining the second sound outlet cavity 6a located between the intermediate septum 23 and the second diaphragm 24. On the other hand, it serves as a driving connector to connect the voice coil 22 to drive the intermediate septum 23 and the second folded ring 241 to vibrate, thereby satisfying the above sound vibration requirements. Furthermore, by connecting the intermediate septum 23 through the second diaphragm plate 242, there is no need to connect the intermediate septum 23 to the voice coil 22, simplifying the installation arrangement structure of the intermediate septum 23.

[0074] Furthermore, the connection between the second diaphragm 24 and the voice coil 22 can be achieved by using an independent connector or by adjusting the main structure of the second diaphragm 24 for direct connection. In this embodiment, an independent rigid connector 25 is used for connection to facilitate structural layout and product assembly. Specifically, the connection point between the rigid connector 25 and the voice coil 22 is not limited, as long as it can link the voice coil 22 and the second diaphragm 24 to vibrate. That is, it can be connected to the side of the voice coil 22. However, if it is set in this way, the rigid connector 25 will occupy the width of the magnetic gap 1a and affect the magnetic field acting on the voice coil 22 within the magnetic gap 1a, thus affecting the vibration performance of the voice coil 22 and consequently the sound production performance of the speaker 100. Therefore, in this embodiment, the rigid connector 25 is set at the end of the voice coil 22 away from the first diaphragm 21 to avoid the rigid connector 25 occupying the width of the magnetic gap 1a and affecting the magnetic field acting on the voice coil 22 within the magnetic gap 1a when located on the side of the voice coil 22.

[0075] The intermediate diaphragm 23 is a flexible component, and its effective vibration area is smaller than that of the second diaphragm 24. It is understood that the second sound cavity 6a defined between the second diaphragm 24 and the intermediate diaphragm 23 provides sound waves with the same phase as the sound waves radiated by the first diaphragm 21 during vibration. The intermediate diaphragm 23, following the vibration of the second diaphragm 24, provides sound waves with the opposite phase to the sound waves radiated by the first diaphragm 21, thus weakening the sound output performance of the second sound cavity 6a. Therefore, while meeting structural functional requirements, the effective vibration area of ​​the intermediate diaphragm 23 should be set smaller than that of the second diaphragm 24. This allows the sound waves of the second sound cavity 6a to have the same phase as and positively superimposed with the sound waves of the first sound space 4a, improving the FR (frequency response) of the loudspeaker 100. Specifically, in one embodiment of this application, the ratio of the effective vibration area of ​​the intermediate diaphragm 23 to the effective vibration area of ​​the second diaphragm 24 is limited to between 1:3 and 1:1.5. This avoids the situation where the ratio is too large, resulting in an excessively large size of the intermediate diaphragm 23 that would significantly affect the sound production performance of the second sound outlet cavity 6a. At the same time, it avoids the situation where the ratio is too small, resulting in an excessively small size of the intermediate diaphragm 23 that would require a large amplitude, thus necessitating a high degree of flexibility in its material and consequently leading to high costs.

[0076] Alternatively, in the projection along the first direction, the width of the deformed portion 231 of the intermediate septum 23 is greater than or equal to the width of the deformed portion of the second fold ring 241.

[0077] It is understandable that the width of the deformable portion 231 of the intermediate septum 23 is greater than or equal to the width of the deformable portion of the second fold 241, which helps to improve the compliance of the intermediate septum 23 and prevent the intermediate septum 23 from hindering the vibration of the second diaphragm 24 during the follow-up process. On the other hand, the outer connecting portion of the intermediate septum 23 forms a fixed end with the outer shell 3, and only the inner connecting portion is a free end. Therefore, the effective vibration area of ​​the intermediate septum 23 during the vibration process is small. Meanwhile, the second diaphragm 24 includes a second fold 241 made of flexible material and a second vibrating plate 242 made of rigid material. Both ends of the second vibrating plate 242 are free ends, and its projection size along the first direction is its effective vibration area. Compared with the second fold 241 (whose effective vibration area is calculated in the same way as the intermediate septum 23), the second vibrating plate 242 contributes more to the effective vibration area of ​​the second diaphragm 24. At this time, the width of the deformed part of the second fold ring 241 is smaller than the width of the deformed part 231 of the intermediate diaphragm 23, so the size of the second vibrating plate 242 is increased, the effective vibration area of ​​the second diaphragm 24 is increased, and the vibration performance of the second diaphragm 24 is effectively improved.

[0078] Specifically, in another embodiment of this application, the ratio of the width of the deformed portion 231 of the intermediate diaphragm 23 to the width of the deformed portion of the second diaphragm 24 is limited to between 1:1 and 3:1. Within this range, the vibration performance of the second diaphragm 24 and the sound emission performance of the second sound outlet cavity 6a are better.

[0079] Furthermore, the first diaphragm 21 includes a first folded ring 211 and a first vibrating plate 212. The outer edge of the first folded ring 211 is connected to the outer shell 3, and the inner edge of the first folded ring 211 is connected to the first vibrating plate 212. The compliance of the second folded ring 241 and the compliance of the first folded ring 211 are both less than the compliance of the intermediate septum 23.

[0080] Understandably, the compliance of the intermediate diaphragm 23 is greater than that of the second folding ring 241 and the first folding ring 211. In this case, the intermediate diaphragm 23 only serves as an isolation and sealing mechanism and will not affect the vibration performance of the first diaphragm 21 and the second diaphragm 24, thereby improving the low-frequency sensitivity of the speaker.

[0081] In the above embodiments, the first vibrating plate 212 and the second vibrating plate 242 can be made of metal materials such as magnesium-aluminum alloy and magnesium-lithium alloy. The intermediate septum 23 is made of flexible materials such as single-layer PEEK (polyether ether ketone) membrane and composite PEEK (polyether ether ketone) membrane. The materials of the first fold ring 211 and the second fold ring 241 can be the same as or different from those of the intermediate septum 23, and can be selected according to actual needs during use.

[0082] Further, the first housing 31 includes a main body segment 311 and a bent segment 312. The main body segment 311 is arranged in a ring shape. The bent segment 312 is located at the end of the main body segment 311 away from the second housing 32 and extends towards the inside of the main body segment 311. The outer periphery of the first diaphragm 21 and the outer periphery of the intermediate diaphragm 23 are fixed to the two sides of the bent segment 312 away from the main body segment 311. The second sound outlet 7 is located in either the main body segment 311 or the bent segment 312. To meet the relative size requirements of the intermediate diaphragm 23 and the second diaphragm 24, in this embodiment, the bent segment 312 is bent at one end of the main body segment 311 so that the fixing point of the intermediate diaphragm 23 extends inward relative to the second diaphragm 24 to meet the structural size requirements. Based on this, the second sound outlet 7 connecting the second sound outlet cavity 6a can be located in either the main body segment 311 or the bent segment 312. The specific location depends on the actual usage requirements of the speaker 100 and is not specifically limited here.

[0083] Furthermore, in one embodiment where the second sound outlet 7 is located, the second sound outlet 7 is located in the main body section 311. Correspondingly, the outer peripheral side of the first diaphragm 21 and the outer peripheral side of the intermediate septum 23 are fixed to both sides of the end of the bent section 312 away from the main body section 311, or the outer peripheral side of the intermediate septum 23 is sandwiched between the outer peripheral side of the first diaphragm 21 and the bent section 312.

[0084] In another embodiment where the second sound outlet 7 is located, the second sound outlet 7 is located at the bend section 312. The first housing 31 also includes a connecting frame 313 connected to one end of the bend section 312 away from the main body section 311. The outer periphery of the first diaphragm 21 is connected to one end of the connecting frame 313, and the outer periphery of the intermediate diaphragm 23 is connected to the other end of the connecting frame 313 or the bend section 312.

[0085] Furthermore, the outer periphery of the first diaphragm 21 is provided with a first flange that connects to the first housing 31; the outer periphery of the second diaphragm 24 is provided with a second flange that connects to the first housing 31. In this way, the contact area between the first diaphragm 21 and the first housing 31 is increased by the first flange, and the contact area between the second diaphragm 24 and the first housing 31 is increased by the second flange, thereby improving the connection stability and enhancing its waterproof capability.

[0086] In addition, please see Figures 1 to 5 as well as Figure 18 The magnetic circuit system 1 includes a magnetic yoke 14, a central magnet 11, and a peripheral magnet 12. The central magnet 11 is disposed on the magnetic yoke 14. The peripheral magnet 12 is disposed on the magnetic yoke 14 and located around the central magnet 11. A magnetic gap 1a is defined between the peripheral magnet 12 and the central magnet 11. The peripheral magnet 12 is provided with a clearance hole 13 for the rigid connector 25 to pass through. The magnetic yoke 14 is provided with a clearance groove 141 corresponding to the position of the rigid connector 25. Generally, the magnetic circuit system 1 is equipped with a magnetic yoke 14, especially in the magnetic circuit system 1 of small and compact electronic products, to avoid the magnetic field being exposed and affecting the normal operation of external electronic components. In this embodiment, the magnetic yoke 14 is provided at the end of the central magnet 11 away from the first diaphragm 21, that is, the central magnet 11 and the peripheral magnet 12 are both fixed on the magnetic yoke 14. On this basis, since the rigid connector 25 is fixed at the end of the voice coil 22 away from the first diaphragm 21, when the voice coil 22 vibrates, the rigid connector 25 has a travel close to the magnetic yoke 14. In this embodiment, in order to further reduce the height of the speaker 100, a clearance groove 141 is opened on the magnetic yoke 14 to avoid the rigid connector 25, thereby reducing the distance between the end face of the magnetic yoke 14 and the lower end of the rigid connector 25, and thus reducing the height of the speaker 100.

[0087] Further, please refer to Figure 5The clearance groove 141 is a through hole penetrating the magnetic yoke 14. On the one hand, the clearance groove 141, penetrating the magnetic yoke 14, provides the rigid connector 25 with the maximum clearance dimension, thereby minimizing the height of the speaker 100 and meeting the structural requirements of this application. On the other hand, the clearance groove 141, penetrating the magnetic yoke 14, allows the rear acoustic cavity defined by the first diaphragm 21 and the intermediate diaphragm 23, as well as the rear acoustic cavity defined by the second diaphragm 24 and the magnetic yoke 14, to communicate with the outside, preventing the rear acoustic cavity from being sealed off. This prevents the gas inside from creating air pressure that hinders the movement of the first diaphragm 21, the second diaphragm 24, and the intermediate diaphragm 23 when the voice coil 22 drives them to vibrate, thus avoiding any impact on the performance of the speaker 100. It should be noted that, generally, an opening communicating with the aforementioned rear acoustic cavity is made in the outer casing 3. In this embodiment, the clearance groove 141 penetrating the magnetic yoke 14 is directly used to simplify the structure of the speaker 100.

[0088] It should be noted here that, based on the second housing 32 structure and the magnetic yoke 14 structure described above, it can be understood that the magnetic yoke 14 can be fixed inside the second housing 32, or the second housing 32 can be set as a ring structure to be fixed to the magnetic yoke 14. The magnetic yoke 14 completes the sealing of one end of the speaker 100. In this embodiment, the magnetic yoke 14 is combined with the ring structure of the second housing 32, thus simplifying the structure and reducing costs.

[0089] Furthermore, the first housing 31 and the second housing 32 are metal housings, and the magnetic yoke 14 and the second housing 32 are integrally formed, with the first housing 31 and the second housing 32 welded together; or, the first housing 31 is a metal housing, and the magnetic yoke 14 is welded to the first housing 31. It is understood that the magnetic yoke 14 can be part of the outer shell 3 or can be set independently of the outer shell 3, as long as it can achieve its own function of blocking magnetic fields. Therefore, in some embodiments of this application, the magnetic yoke 14 can be integrally formed with the second housing 32, and then the second housing 32 is connected to the first housing 31 to realize the installation of the magnetic yoke 14. In other embodiments of this application, the magnetic yoke 14 can be welded to the first housing 31 to form a complete outer shell 3, that is, the magnetic yoke 14 serves as the second housing 32, combined with the first housing 31 to form the outer shell 3. The specific arrangement depends on actual needs and is not specifically limited here. Furthermore, in embodiments where the magnetic yoke 14 serves as the second housing 32, the magnetic yoke 14 has a weld protrusion extending toward the first housing 31; or, the first housing 31 has a weld protrusion extending toward the magnetic yoke 14; or, the first housing 31 and the magnetic yoke 14 are welded together by welding plates, as long as the magnetic yoke 14 and the first housing 31 can be stably connected, and no specific limitation is made here.

[0090] Furthermore, the bending portion 2422 includes an inclined section 2422a set at an angle to the first direction, and the inclined section 2422a is connected to the main body portion 2421. The second vibrating plate 242 is designed to be connected to the rigid connector 25 while being bent toward the first diaphragm 21 to connect with the intermediate septum 23. Therefore, the specific configuration of the bending portion 2422 is not limited here, as long as it can be bent and extended toward the first diaphragm 21 and connected with the intermediate septum 23. In this embodiment, the inclined section 2422a is provided on the bending portion 2422 so that the second vibrating plate 242 forms multiple bending points, thereby reducing the bending angle of a single bending point, so as to facilitate the structural forming of the second vibrating plate 242. In addition, the inclined section 2422a can also improve the rigidity of the second vibrating plate 242 in the horizontal direction (i.e., the vibration direction perpendicular to the vibration system), thereby improving the vibration performance of the second diaphragm 24 and increasing the feasibility of forming the second vibrating plate 242. Furthermore, the inclined section 2422a facilitates the positioning and connection of the second vibrating plate 242 and the second folding ring 241, thereby improving the connection accuracy.

[0091] Further, please refer to Figures 13 to 14 The magnetic circuit system 1 has an extension corresponding to the inclined section 2422a. The distance between the outer edge of the extension and the inclined section 2422a in the first direction is greater than the amplitude of the second diaphragm. The inclined section 2422a is further away from the magnetic circuit system 1 relative to the inner edge of the second diaphragm 242. Based on this, the magnetic circuit system 1 can be provided with an extension at the location corresponding to the inclined section 2422a. While ensuring that the distance between the outer edge of the extension and the inclined section 2422a in the first direction is greater than the amplitude of the second diaphragm 242, the extension causes the outer edge of the magnetic circuit system 1 to tilt outward, thereby increasing the size of the magnetic circuit system 1, further improving the BL value of the loudspeaker 100, and improving the sound production effect of the loudspeaker 100.

[0092] Furthermore, the outer periphery of the first diaphragm is provided with a first flange that connects to the first housing; the outer periphery of the second diaphragm is provided with a second flange that connects to the first housing. Thus, the first flange increases the contact area between the first diaphragm and the first housing, and the second flange increases the contact area between the second diaphragm and the first housing, thereby improving connection stability and enhancing waterproofing capabilities.

[0093] Furthermore, the intermediate diaphragm 23 includes a deformation portion 231, which protrudes toward the second diaphragm 24. The deformation portion 231 of the intermediate diaphragm 23 has been described above and will not be repeated here. The deformation portion 231 can protrude toward either the first diaphragm 21 or the second diaphragm 24, both satisfying functional requirements. In this embodiment, the deformation portion 231 is configured to protrude toward the second diaphragm 24 to avoid affecting the vibration stroke of the first diaphragm 21, i.e., to avoid interfering with the sound production of the first diaphragm 21. This allows the distance between the first diaphragm 21 and the intermediate diaphragm 23 to be reduced, thereby achieving the goal of a thinner and lighter structure design that reduces the size of the speaker 100 in the first direction.

[0094] Furthermore, the first diaphragm 21 includes a first folded ring 211, which protrudes toward the intermediate septum 23. Since the deformable portion 231 protrudes toward the second diaphragm 24, it does not interfere with the space between the intermediate septum 23 and the first diaphragm 21. To further reduce the thickness of the speaker 100, in this embodiment, the first folded ring 211 on the first diaphragm 21 is configured to protrude toward the intermediate septum 23, so that the space between the first diaphragm 21 and the intermediate septum 23 accommodates the protruding first folded ring 211, thereby reducing the height of the speaker 100.

[0095] Furthermore, the deformable portion 231 is disposed opposite to the deformable portion of the first folded ring 211. Based on the structure of the first folded ring 211 and the deformable portion 231 described above, this embodiment defines the relative positional relationship between the deformable portion 231 and the first folded ring 211. Specifically, when the deformable portion 231 protrudes towards the second diaphragm 24, a groove must be formed on the side facing the first diaphragm 21. In this embodiment, the first folded ring 211 and the deformable portion 231 are disposed opposite to each other. On the one hand, the vibration of the first folded ring 211 is avoided by the groove to avoid structural interference. On the other hand, the distance between the first diaphragm 21 and the intermediate diaphragm 23 can be further reduced, thereby further reducing the height of the speaker 100 and achieving a further reduction in the thinness and lightness of the design.

[0096] Furthermore, the second fold ring 241 protrudes towards the side of the intermediate septum 23, and the second fold ring 241 and the deformation part 231 are offset in a second direction, which is perpendicular to the first direction. To avoid the second fold ring 241 encroaching on the space of the second diaphragm 24 facing away from the intermediate septum 23, and to avoid possible structural interference, this application sets the second fold ring 241 to protrude towards the intermediate septum 23. At the same time, combined with the structural basis of the deformation part 231 protruding towards the second diaphragm 24, this embodiment sets the second fold ring 241 and the deformation part 231 to be offset to avoid relative interference between them, which would increase the height of the speaker 100, and further meet the requirements of a thin and light structure.

[0097] Furthermore, a first sound-emitting space 4a is defined between the first housing 31 and the first side of the first diaphragm 21; or, the first housing 31 and the first side of the first diaphragm 21 are respectively open at one end. It is understood that the first diaphragm 21 can be located at the end of the housing 3, i.e., one end of the housing 3 is open, so that when the speaker 100 is used in other devices, the other devices and the housing 3 define the first sound-emitting space 4a, thus simplifying the structure by eliminating the need for the housing 3 and the first diaphragm 21 to enclose and define the first sound-emitting space 4a. Conversely, the first diaphragm 21 can also be installed inside the housing 3, so that the first diaphragm 21 and the housing 3 define the first sound-emitting space 4a. Both of these configurations can meet the sound-emitting function requirements of the speaker 100. Based on the actual usage scenario and requirements of the speaker 100, no specific limitation is made here.

[0098] In addition, please see Figures 15 to 16 as well as Figures 19 to 20 Based on the structural embodiment in which the outer shell 3 and the first side of the first diaphragm 21 are respectively open at one end, this application also proposes an embodiment in which the loudspeaker 100 further includes a cover 10, which covers the open end of the outer shell 3 to define a first sound outlet space 4a between the first side of the first diaphragm 21 and the cover 10. The cover 10 is provided with a first sound outlet hole 5 communicating with the first sound outlet space 4a.

[0099] Furthermore, the first sound outlet 5 and the second sound outlet 7 are directly opposite and connected, and the sound waves of the second sound outlet cavity 6a radiate to the outside through the second sound outlet 7 and the first sound outlet 5; or, the second sound outlet 7 is opened at the position of the outer shell 3 corresponding to the first sound outlet space 4a, so as to connect the first sound outlet space 4a and the second sound outlet cavity 6a. Based on the speaker 100 structure proposed in this application, it forms a dual-cavity structure with a first sound outlet space 4a and a second sound outlet cavity 6a. Therefore, the first sound outlet 5 corresponding to the first sound outlet space 4a and the second sound outlet 7 corresponding to the second sound outlet cavity 6a can be arranged relative to each other or independently, depending on the actual structural requirements. Specifically, when the first sound outlet 5 and the second sound outlet 7 are arranged relative to each other, the first sound outlet space 4a and the second sound outlet cavity 6a are arranged independently. The sound waves of the second sound outlet cavity 6a radiate to the outside through the second sound outlet 7 and the first sound outlet 5. When the first sound outlet 5 and the second sound outlet 7 are arranged independently, it is only necessary to ensure that the second sound outlet 7 is arranged corresponding to the first sound outlet space 4a. The sound waves of the second sound outlet cavity 6a radiate to the outside through the second sound outlet 7, the first sound outlet space 4a and the first sound outlet 7.

[0100] In addition, please see Figures 6 to 8The loudspeaker 100 also includes an elastic support member 8, which includes an outer fixing part 81, an inner fixing part 82, and a spring arm 83 connecting the outer fixing part 81 and the inner fixing part 82. The outer fixing part 81 is connected to the outer shell 3 and is provided with a first electrical connection part 811. The inner fixing part 82 is supported and connected to the second diaphragm 242 and the voice coil 22, and is provided with a second electrical connection part 821 that is electrically connected to the voice coil 22. It is understandable that, in order to achieve the desired sound by having the voice coil 22 vibrate within the magnetic gap 1a according to a certain vibration requirement, the voice coil 22 needs to be connected to an electrical signal. This means that an electrical connector is needed to connect the voice coil 22 to the external signal source of the speaker 100. Specifically, this electrical connector can be configured in various ways, such as a flexible wire structure or a rigid connection structure that moves synchronously with the voice coil 22 along its vibration direction. No specific limitation is made here, as long as the voice coil 22 can be connected to the external signal source. In this embodiment, an elastic support 8 is provided. On the one hand, the elastic support 8 connects the voice coil 22 to the external signal source; on the other hand, the elastic support 8 enables the second diaphragm 24 to vibrate. Constraint in one direction, i.e., the direction of vibration, can better suppress the poor performance caused by polarization under large amplitude. Specifically, the inner fixing part 82 and the outer fixing part 81 are connected by the spring arm 83. The outer fixing part 81 is fixed to the outer shell 3, and the inner fixing part 82 is fixed between the voice coil 22 and the second diaphragm 24. The above-mentioned constraint effect is achieved by the elasticity of the spring arm 83 itself. At the same time, a first electrical connection part 811 connected to an external signal source is provided on the outer fixing part 81, and a second electrical connection part 821 connected to the voice coil 22 is provided on the inner fixing part 82. Through the conductivity of the spring arm 83, the inner fixing part 82 and the outer fixing part 81, the first electrical connection part 811 and the second electrical connection part 821 are connected, thereby satisfying the above structural and functional requirements.

[0101] Specifically, the outer fixing part 81 is arranged in a ring shape, and the inner fixing part 82 is disposed inside the outer fixing part 81 and connected to the inner side of the outer fixing part 81 through the spring arm 83. The structural arrangement of the outer fixing part 81 and the inner fixing part 82 is not specifically limited here, as long as the spring arm 83 is connected to achieve the constraint effect described above. At the same time, the first electrical connection part 811 and the second electrical connection part 821 can be electrically connected. In this embodiment, the outer fixing part 81 is set as a ring structure to stably cooperate with the outer shell 3 and improve the connection and support stability of the elastic support member 8. Based on this, the spring arm 83 is connected to the inner fixing part. The inner side of the outer fixing part 81 and the inner side of the inner fixing part 82 are sufficient. Based on the structure of the annular outer fixing part 81 and the structural stability it brings, the spring arm 83 can extend along the inner edge of the outer fixing part 81 to increase the length of the spring arm 83, thereby improving the reliability of the second diaphragm 24 when it operates at a large amplitude. That is, the outer fixing part 81 is configured to have alternating short axis sides and long axis sides. The spring arm 83 is led out from the side of the inner fixing part 82 corresponding to the short axis side and bends to extend along the long axis side. The spring arm 83 is connected to the central area of ​​the long axis side, thereby increasing the length of the spring arm 83, increasing its stress, and improving reliability.

[0102] Furthermore, the inner fixing part 82 includes a main body and an extension extending from the main body toward the voice coil 22. The main body is connected to the second diaphragm 242, and the extension is connected to the voice coil 22. A second electrical connection part 821 is provided on the extension or the main body. The location of the second electrical connection part 821 on the inner fixing part 82 is not limited. The inner fixing part 82 is used to connect the second diaphragm 242 and the voice coil 22. That is, the inner fixing part 82 includes at least a main body for connecting to the second diaphragm 242 and an extension extending from the main body to the voice coil. The second electrical connection part 821 can be provided on the main body or the extension. The specific location of the second electrical connection part 821 on the main body or the extension is also not limited, as long as the functional requirements are met.

[0103] Furthermore, the first electrical connection part 811 for connecting to an external signal source has been described above. Therefore, in this embodiment, the first electrical connection part 811 is also provided on the outer periphery of the outer fixing part 81. On the one hand, it is convenient for the first electrical connection part 811 to extend out of the outer shell 3, and on the other hand, it is fixed to the outer shell 3, resulting in strong structural stability. Of course, the first electrical connection part 811 can also be connected to the external signal source by setting other connection structures. This makes it possible to not limit the setting position of the first electrical connection part 811 and still achieve the electrical connection function, but it is obviously more cumbersome and impractical.

[0104] Furthermore, the rigid connector 25 is connected to the side of the inner fixing part 82 facing away from the second diaphragm 24. The inner fixing part 82 and the rigid connector 25 can be independent structures, that is, they respectively connect the voice coil 22 and the second diaphragm 24, or they can have a certain relative positional relationship. In this embodiment, considering that the inner fixing part 82 and the rigid connector 25 have the same connection and support function, the rigid connector 25 is connected to the inner fixing part 82 to jointly connect the voice coil 22 and the second diaphragm 24. In this way, the connection structure between the inner fixing part 82 and the voice coil 22 is strengthened by the rigid connector 25, thereby ensuring the electrical connection stability between the second electrical connection part 821 on the inner fixing part 82 and the voice coil 22. Meanwhile, the inner fixing part 82 is clamped between the rigid connector 25 and the voice coil 22, which increases the distance between the inner fixing part 82 and the magnetic circuit system 1. The second electrical connection part 821 is located on the side of the inner fixing part 82 away from the rigid connector 25. The lead wire of the voice coil 22 is spot welded to the second electrical connection part 821. In this way, only a part of the magnetic circuit system 1 needs to avoid the rigid connector 25, reducing the avoidance of the lead wire of the voice coil 22, which is conducive to the thinner design.

[0105] In addition, please see Figures 1 to 4 as well as Figure 18 The magnetic circuit system 1 includes a central magnet 11 and peripheral magnets 12. The peripheral magnets 12 are disposed around the central magnet 11 and define a magnetic gap 1a between them. The peripheral magnets 12 are provided with clearance holes 13 for the elastic support member 8 and the rigid connector 25 to pass through. The central magnet 11 and the peripheral magnets 12 form the magnetic field environment required for the vibration of the voice coil 22. Generally, the peripheral magnets 12 consist of multiple magnets disposed around the central magnet 11, with gaps between them to form clearance holes 13. The elastic support member 8 and the rigid connector 25 can extend through the clearance holes 13 into the magnetic gap 1a and connect with the voice coil 22, thus meeting structural and functional requirements.

[0106] Further, please refer to Figures 9 to 11 In one embodiment, the intermediate diaphragm 23 has a first extension 232 extending to the clearance hole 13, and the second diaphragm 242 has a second extension 2423 extending to the clearance hole 13. The first extension 232 and the second extension 2423 are correspondingly connected. This arrangement, on the one hand, utilizes the space at the clearance hole 13 to further increase the size of the second diaphragm 242 and the cavity size of the second sound outlet cavity 6a enclosed by the second diaphragm 242 and the intermediate diaphragm 23, so as to further improve the sound production effect without increasing the height of the loudspeaker 100. On the other hand, by providing the first extension 232 and the second extension 2423, the structural strength of the intermediate diaphragm 23 and the second diaphragm 242 is also improved.

[0107] In addition, please see Figures 12 to 14In another embodiment, the voice coil 22 has a first protrusion 221 extending to the clearance hole 13, and the central magnet 11 has a second protrusion 111 extending to the clearance hole 13, with the first protrusion 221 and the second protrusion 111 correspondingly arranged. Unlike the above embodiment where the first extension 232 and the second extension 2423 are provided to utilize the space at the clearance hole 13, this embodiment utilizes the space at the clearance hole by providing the first protrusion 221 and the second protrusion 111. With this arrangement, the perimeter of the central magnet 11 becomes larger, so that the wire length of the voice coil 22 located outside the central magnet 11 becomes longer, and the magnetic field strength at the magnetic gap 1a becomes stronger, thereby increasing the BL value (the product of the magnetic gap magnetic field strength B and the voice coil wire length L) of the loudspeaker 100. This results in the loudspeaker 100 having better transient response and higher sensitivity, making the sound clearer and more natural.

[0108] Further, please refer to Figures 6 to 8 The outer fixing part 81 and the outer periphery of the second diaphragm 24 are sandwiched between the first housing 31 and the second housing 32. The specific structure of the elastic support 8 has been described in detail above and will not be repeated here. Based on the above description, since the voice coil 22 and the second diaphragm 24 are fixed to the first housing 31, the elastic support 8 connecting the voice coil 22 and the second diaphragm 24 should also be fixed to the first housing 31 first, and then closed with the second housing 32 to complete the assembly of the speaker 100. At this time, based on the structural setting of the second diaphragm 24 located between the first housing 31 and the second housing 32, the first electrical connection part 811 on the outer fixing part 81 of the elastic support 8 needs to extend out of the outer housing 3. Therefore, in this embodiment, the outer fixing part 81 is set to be sandwiched between the second diaphragm 24 and the second housing 32 to facilitate the arrangement of the first electrical connection part 811.

[0109] In addition, please see Figures 1 to 4 as well as Figure 18 The first diaphragm 21 includes a first folded ring 211 and a first diaphragm plate 212. The outer periphery of the first folded ring 211 is connected to the outer shell 3, and the inner periphery of the first folded ring 211 is connected to the first diaphragm plate 212. The first diaphragm plate 212 is integrally provided with a protrusion that connects to the voice coil 22. Alternatively, a connecting plate 9 is fixed to the end of the voice coil 22, and the connecting plate 9 connects the voice coil 22 and the first diaphragm plate 212. The connection method between the first diaphragm 21 and the voice coil 22 is not limited. That is, the first diaphragm 21 can be directly connected to the voice coil 22, or it can be connected through the connecting plate 9. The actual connection depends on the structural dimensions of the first diaphragm 21 and the distance between the first diaphragm 21 and the voice coil 22, as long as the first diaphragm 21 can be connected to the voice coil 22 and its sealing is ensured.

[0110] Please see Figure 17 as well as Figure 21This application also proposes an electronic device 1000, wherein the electronic device 1000 includes a cavity 200 and a speaker 100, and the cavity 200 has an electronic device sound outlet 201; the specific structure of the speaker 100 is as described in the above embodiments. Since the electronic device 1000 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. The first sound outlet space 4a and the second sound outlet cavity 6a are both connected to the electronic device sound outlet 201.

[0111] Specifically, a first rear sound outlet cavity 4b is defined between the first diaphragm 21 and the intermediate septum 23, and a second rear sound outlet cavity 6b is defined on the side of the second diaphragm 24 away from the intermediate septum 23. The first rear sound outlet cavity 4b and the second rear sound outlet cavity 6b are connected. The loudspeaker 100 is provided with a rear sound outlet channel 101. The first rear sound outlet cavity 4b and the second rear sound outlet cavity 6b are connected to the cavity 200 through the rear sound outlet channel 101, and the effective volume of the cavity 200 is ≥2.5cc.

[0112] In the electronic device of this application, the rear sound cavity (first rear sound cavity 4b and second rear sound cavity 6b) of the speaker 100 is connected to the cavity 200 of the electronic device through the rear sound channel 101. The cavity 200 of the electronic device expands the space of the rear sound cavity of the speaker 100, which is beneficial to the diffusion of sound waves in the rear sound cavity. It reduces the reaction force on the air in the rear sound cavity during vibration when the effective vibration area of ​​the vibration system 2 is increased, thereby enabling the vibration system 2 to achieve large amplitude vibration and improve the sound quality of the speaker 100. In addition, the larger volume of the cavity 200 can provide better heat dissipation space, which helps to reduce the temperature of the speaker 100, thereby improving its stability and service life.

[0113] Based on the specific structure of the loudspeaker 100 described above, the first rear sound outlet cavity 4b and the second rear sound outlet cavity 6b are connected. The rear sound outlet channel 101 can be disposed on the housing 3 of the loudspeaker 100 or on the magnetic circuit system 1. When the rear sound outlet channel 101 is disposed on the magnetic circuit system 1, the rear sound outlet channel 101 is a through hole penetrating the magnetic yoke 14. Of course, other methods can also be used to connect the rear sound outlet cavity with the cavity 200, which is not specifically limited here. Based on this, in order to avoid the non-circulating air in the closed cavity 200 connected to the first rear sound outlet cavity 4b and the second rear sound outlet cavity 6b from hindering the vibration of the loudspeaker 100 when it vibrates, the effective volume of the cavity 200 needs to be set to not less than 2.5cc to reduce or even eliminate the influence and meet the sound performance of the electronic device 1000.

[0114] The above are merely exemplary embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the technical concept of this utility model and the contents of the specification and drawings of this utility model, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A loudspeaker, characterized by The loudspeaker comprises a housing, a magnetic circuit system connected to the housing and having a magnetic gap, and a vibration system comprising: a first diaphragm having a first side and a second side in a first direction, an outer periphery of the first diaphragm being connected to the housing, the first side of the first diaphragm being a first sound radiation space; a voice coil disposed on the second side of the first diaphragm and connected to the first diaphragm, the voice coil being at least partially disposed in the magnetic gap; an intermediate partition membrane disposed annularly on the second side of the first diaphragm, an outer periphery of the intermediate partition membrane being connected to the housing; a second diaphragm disposed annularly on a side of the intermediate partition membrane away from the first diaphragm, the second diaphragm comprising a second folded ring and a second vibrating plate, an outer periphery of the second folded ring being connected to the housing, the second vibrating plate comprising a main body portion connected to an inner periphery of the second folded ring, and a bending portion connected to the main body portion and an inner periphery of the intermediate partition membrane, a second sound radiation cavity being defined between the intermediate partition membrane and the second diaphragm, a second sound radiation hole being formed in the housing and communicating with the second sound radiation cavity; and a rigid connecting member connected between the second diaphragm and the voice coil and located at an end of the voice coil away from the first diaphragm. The housing comprises a first housing and a second housing disposed opposite to each other in the first direction. The outer periphery of the first diaphragm and the outer periphery of the intermediate partition membrane are fixed to the first housing, the magnetic circuit system is fixed to the second housing, the outer periphery of the second diaphragm is clamped between the first housing and the second housing, and the second sound radiation hole is formed in the first housing.

2. The loudspeaker of claim 1, wherein The first housing comprises: a main body section disposed annularly; and a bending section located at an end of the main body section away from the second housing and extending towards an inner side of the main body section, the outer periphery of the first diaphragm and the outer periphery of the intermediate partition membrane being fixed to an end of the bending section away from the main body section. The second sound radiation hole is formed in the main body section or the bending section.

3. The loudspeaker of claim 2, wherein When the second sound radiation hole is formed in the main body section, the outer periphery of the first diaphragm and the outer periphery of the intermediate partition membrane are fixed to both sides of an end of the bending section away from the main body section, or the outer periphery of the intermediate partition membrane is clamped between the outer periphery of the first diaphragm and the bending section. When the second sound radiation hole is formed in the bending section, the first housing further comprises a connecting frame connected to the end of the bending section away from the main body section, the outer periphery of the first diaphragm is connected to one end of the connecting frame, and the outer periphery of the intermediate partition membrane is connected to the other end of the connecting frame or the bending section.

4. The loudspeaker of claim 1, wherein The intermediate partition membrane is a flexible member: an effective vibration area of the intermediate partition membrane is smaller than an effective vibration area of the second diaphragm; and / or in a projection along the first direction, a width of a deformation portion of the intermediate partition membrane is greater than or equal to a width of a deformation portion of the second folded ring; and / or The first diaphragm comprises a first folded ring and a first vibrating plate, an outer edge of the first folded ring is connected with the shell, an inner edge of the first folded ring is connected with the first vibrating plate, the compliance of the second folded ring and the compliance of the first folded ring are both less than the compliance of the intermediate partition membrane.

5. The loudspeaker of claim 1, wherein The magnetic circuit system comprises: a magnetic yoke; a central magnet arranged on the magnetic yoke; and a peripheral magnet arranged on the magnetic yoke and located at the periphery of the central magnet, and the magnetic gap is defined between the peripheral magnet and the central magnet; wherein the peripheral magnet is provided with a clearance hole for the rigid connecting piece to pass through, and the magnetic yoke is provided with a clearance groove corresponding to the position of the rigid connecting piece.

6. The loudspeaker of claim 5, wherein The second shell is arranged in a ring shape and surrounds the magnetic yoke; or the second shell is a metal shell, and the magnetic yoke and the second shell are integrally formed; or the first shell and the second shell are metal shells, the magnetic yoke and the second shell are integrally formed, and the first shell and the second shell are welded.

7. The loudspeaker of claim 1, wherein The bending portion comprises an inclined section arranged at an angle to the first direction, and the inclined section is connected with the main body portion; and / or the outer periphery of the first diaphragm is provided with a first flange connected with the first shell; and / or the outer periphery of the second diaphragm is provided with a second flange connected with the first shell.

8. The loudspeaker of claim 1, wherein The deformation portion of the intermediate partition membrane is arranged protruding towards the second diaphragm, the deformation portion of the second folded ring is arranged protruding towards the first diaphragm, the deformation portion of the intermediate partition membrane and the deformation portion of the second folded ring are arranged in a staggered manner in the second direction, and the second direction is perpendicular to the first direction.

9. The loudspeaker of claim 1, wherein, The first shell and the first side of the first diaphragm define the first sound outlet space; or one end of the first shell corresponding to the first side of the first diaphragm is arranged in an open manner.

10. An electronic device, comprising: comprises: a cavity provided with an electronic device sound outlet hole; and a loudspeaker as claimed in any one of claims 1 to 9, wherein the first sound outlet space and the second sound outlet cavity are both in communication with the electronic device sound outlet hole, a first rear sound outlet cavity is defined between the first diaphragm and the intermediate partition membrane, a second rear sound outlet cavity is defined on the side of the second diaphragm away from the intermediate partition membrane, the first rear sound outlet cavity and the second rear sound outlet cavity are in communication, the loudspeaker is provided with a rear sound outlet channel, the first rear sound outlet cavity and the second rear sound outlet cavity are in communication with the cavity through the rear sound outlet channel, and the effective volume of the cavity is greater than or equal to 2.5cc.

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