Loudspeaker and electronic device

Abstract

The invention discloses a loudspeaker and electronic equipment, and relates to the technical field of loudspeaker structures.The loudspeaker comprises a shell, a shell cover, a magnetic circuit system and a vibration system, the magnetic circuit system and the vibration system are connected with the shell, the magnetic circuit system is provided with a magnetic gap, and the vibration system comprises a first vibrating diaphragm, a voice coil, a middle diaphragm, a second vibrating diaphragm and a rigid connecting piece; one end of the shell is opened, the peripheral side of the first vibrating diaphragm is connected with the shell, the shell cover is arranged on the shell in a covering manner, a first sound outlet cavity is defined by the shell cover and the first vibrating diaphragm, and a first sound outlet hole communicated with the first sound outlet cavity is formed in the shell cover; the voice coil is connected with the first vibrating diaphragm; the peripheral side of the middle diaphragm is connected with the shell; the outer peripheral side of the second vibrating diaphragm is connected with the shell, the inner peripheral side of the second vibrating diaphragm is connected with the voice coil, a second sound outlet cavity is defined by the middle diaphragm and the second vibrating diaphragm, and a second sound outlet hole is formed in the shell; the rigid connecting piece is connected between the second vibrating diaphragm and the voice coil. The invention aims to provide a specific use structure of a small-size high-performance loudspeaker.

Description

Technical Field

[0001] The present invention relates to the technical field of loudspeaker structures, and in particular to a loudspeaker and an electronic device. Background Art

[0002] With the rapid development of the consumer electronics industry, people's requirements for electronic products are constantly increasing. In addition to the performance differences of the products themselves, their portability and comfort are several aspects that people focus on. At present, it is difficult for conventional speaker solutions to take into account multiple design requirements such as high performance and lightness at the same time. When designing to meet the above design requirements, it is also necessary to consider its specific usage scenarios to ensure its performance. Summary of the invention

[0003] The main purpose of the present invention is to propose a loudspeaker and an electronic device, aiming to provide a specific usage structure of a small-sized high-performance loudspeaker.

[0004] To achieve the above object, the present invention provides a loudspeaker, wherein the loudspeaker comprises a housing, a shell, and a magnetic circuit system and a vibration system connected to the housing, the magnetic circuit system has a magnetic gap, and the vibration system comprises:

[0005] A first diaphragm has a first side and a second side in a first direction, the housing has an end corresponding to the first side of the first diaphragm and is open, the outer peripheral side of the first diaphragm is connected to the housing, the housing cover is arranged on the open end of the housing to define a first sound outlet cavity between the first side of the first diaphragm and the housing cover, and the housing cover is provided with a first sound outlet hole connected to the first sound outlet cavity;

[0006] 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;

[0007] a middle diaphragm, which is arranged in an annular shape and is located on the second side of the first diaphragm, and the outer peripheral side of the middle diaphragm is connected to the housing; and

[0008] a second diaphragm, which is arranged in an annular shape and is located on a side of the middle diaphragm away from the first diaphragm, the second diaphragm includes a second folded ring and a second vibration plate, the outer peripheral side of the second folded ring is connected to the outer shell, the second vibration plate includes a main body connected to the inner peripheral side of the second folded ring, and a bent portion connected to the main body and the inner peripheral side of the middle diaphragm, and a second sound outlet cavity is defined between the middle diaphragm and the second diaphragm, a second sound outlet hole is opened on the outer shell, and the second sound outlet hole is connected to the second sound outlet cavity; and,

[0009] A rigid connecting member is connected between the second diaphragm and the voice coil and is connected to an end of the voice coil away from the first diaphragm.

[0010] In one embodiment, the first sound outlet hole is directly opposite to and connected to the second sound outlet hole, and the sound waves of the second sound outlet cavity are radiated to the outside through the second sound outlet hole and the first sound outlet hole; or,

[0011] The second sound outlet hole is formed at a position of the housing corresponding to the first sound outlet cavity so as to connect the first sound outlet cavity with the second sound outlet cavity.

[0012] In one embodiment, the bending portion includes an inclined section arranged at an angle to the first direction, and the inclined section is connected to the main body.

[0013] In one embodiment, the middle diaphragm is a flexible member, and the middle diaphragm includes an outer connecting portion, a bent deformation portion, and an inner connecting portion, wherein the outer connecting portion is connected to the outer shell, the inner connecting portion is connected to the bent portion, and the deformation portion connects the outer connecting portion and the inner connecting portion:

[0014] The effective vibration area of ​​the middle diaphragm is smaller than the effective vibration area of ​​the second diaphragm; and / or,

[0015] In the projection along the first direction, the width of the deformation portion of the middle diaphragm is greater than or equal to the width of the deformation portion of the second fold ring; and / or,

[0016] The first diaphragm includes a first fold ring and a first vibration plate, the outer edge of the first fold ring is connected to the outer shell, the inner edge of the first fold ring is connected to the first vibration plate, and the compliance of the second fold ring and the compliance of the first fold ring are both smaller than the compliance of the middle diaphragm.

[0017] In one embodiment, the magnetic circuit system comprises:

[0018] yoke;

[0019] a central magnet disposed on the magnetic yoke; and

[0020] A peripheral magnet is disposed on the magnetic yoke and is located outside the central magnet, and the magnetic gap is defined between the peripheral magnet and the central magnet;

[0021] The peripheral magnet is provided with a clearance hole for the rigid connector to pass through, and the magnetic yoke is provided with an escape groove at a position corresponding to the rigid connector, and the escape groove is a through hole penetrating the magnetic yoke.

[0022] In one embodiment, the deformation portion of the middle diaphragm is protruded toward the second diaphragm, the deformation portion of the second fold ring is protruded toward the first diaphragm, the deformation portion of the middle diaphragm and the deformation portion of the second fold ring are staggered in a second direction, and the second direction is perpendicular to the first direction.

[0023] In one embodiment, the housing includes a first shell and a second shell disposed opposite to each other in a first direction;

[0024] The outer peripheral side of the first diaphragm and the outer peripheral side of the diaphragm are both fixed to the first shell, the outer peripheral side of the second fold ring is clamped between the first shell and the second shell, the magnetic circuit system is fixed to the second shell, the second sound outlet hole is opened in the first shell, and the shell cover is arranged on the first shell.

[0025] In one embodiment, the first housing comprises:

[0026] A main body section is arranged in a ring shape; and

[0027] A bending section, located at one end of the main section away from the second shell and extending toward the inner side of the main section, the outer peripheral side of the first diaphragm and the outer peripheral side of the middle diaphragm are fixed to the end of the bending section away from the main section;

[0028] Wherein, the second sound outlet is arranged in the main body section or the bending section.

[0029] In one embodiment, the speaker also includes an elastic support member, the elastic support member includes an external fixing portion, an internal fixing portion and an elastic arm connecting the external fixing portion and the internal fixing portion, the external fixing portion is connected to the outer shell, and a first electrical connection portion is arranged thereon, the internal fixing portion is supported and connected to the second vibration plate and the voice coil, and a second electrical connection portion electrically connected to the voice coil is arranged on the internal fixing portion, and the rigid connecting member is connected to the side of the internal fixing portion facing away from the second diaphragm.

[0030] The present invention further provides an electronic device, wherein the electronic device comprises:

[0031] The cavity is provided with a sound outlet of the electronic device; and

[0032] A loudspeaker, the loudspeaker comprising an outer shell, a shell cover, and a magnetic circuit system and a vibration system arranged in the outer shell, the magnetic circuit system having a magnetic gap, the vibration system comprising a first diaphragm, a voice coil, an intermediate diaphragm, a second diaphragm and a rigid connector, the first diaphragm having a first side and a second side in a first direction, the outer shell having an end corresponding to the first side of the first diaphragm being open, the outer peripheral side of the first diaphragm being connected to the outer shell, the shell cover being arranged at the open end of the outer shell to define a first sound outlet cavity between the first side of the first diaphragm and the shell cover, and the shell cover being provided with a first sound outlet hole communicating with the first sound outlet cavity; the voice coil being arranged at the second side of the first diaphragm and being connected to the first diaphragm, the voice coil being at least partially placed in the magnetic gap ; The middle diaphragm is arranged in an annular shape and is located on the second side of the first diaphragm, and the outer peripheral side of the middle diaphragm is connected to the outer shell; the second diaphragm is arranged in an annular shape and is located on the side of the middle diaphragm away from the first diaphragm, the second diaphragm includes a second folding ring and a second vibration plate, the outer peripheral side of the second folding ring is connected to the outer shell, the second vibration plate includes a main body connected to the inner peripheral side of the second folding ring, and a bending part connecting the main body and the inner peripheral side of the middle diaphragm, and a second sound output cavity is defined between the middle diaphragm and the second diaphragm, and a second sound output hole is opened on the outer shell, and the second sound output hole is connected to the second sound output cavity; the rigid connecting member is connected between the second diaphragm and the voice coil and is connected to the end of the voice coil away from the first diaphragm. The first sound output cavity and the second sound output cavity are both connected to the sound output hole of the electronic device, a first rear sound output cavity is defined between the first diaphragm and the middle diaphragm, a second rear sound output cavity is defined on the side of the second diaphragm away from the middle diaphragm, the first rear sound output cavity and the second rear sound output cavity are connected, the speaker is provided with a rear sound output channel, the first rear sound output cavity and the second rear sound output cavity are connected to the cavity through the rear sound output channel, and the effective volume of the cavity is ≥2.5cc.

[0033] In the technical solution of the present invention, the middle diaphragm and the second diaphragm are added to the conventional speaker, and the second sound cavity is defined by the middle diaphragm and the second diaphragm, so as to drive the second diaphragm to vibrate through the voice coil, thereby changing the volume of the second sound cavity to promote air vibration and emit sound. In this way, the voice coil can be used to drive the first diaphragm to drive the air in the first sound cavity to vibrate, and at the same time drive the second diaphragm to drive the air in the second sound cavity to vibrate, thereby increasing the effective vibration area of ​​the speaker, thereby improving the performance of the speaker. On this basis, the first diaphragm can be set to leak out to directly vibrate the external air of the speaker to achieve sound, but its sound performance is seriously affected by the complexity of environmental factors, making the use of the speaker unstable, thereby causing the use performance of the speaker to be unstable. Therefore, in this application, the shell cover is also set on the first side of the first diaphragm set to leak out, so as to define the first sound cavity through the shell cover fixed to the shell and the first diaphragm leaking out of the shell, so as to fix the first sound cavity structure, thereby ensuring the vibration and sound performance of the first diaphragm. It should be noted here that the structure of the first sound cavity defined by the first diaphragm set to be exposed is not limited to the shell cover set in the outer shell, but can also be other structures, such as the shell of an electronic device on which the speaker is installed, as long as it can meet the use requirements. The shell cover structure proposed in this embodiment is to stabilize the performance of the speaker itself and reduce the impact of other structures on the performance of the speaker in the speaker usage scenario. In addition, the first diaphragm can also be set to a non-exposed structure, that is, the first diaphragm is set in the outer shell to define the first sound cavity with the outer shell, which also meets the above-mentioned structural requirements for stable performance. However, compared with the setting of the shell cover structure, on the one hand, the installation and fixation of the first diaphragm built into the outer shell is inconvenient, and on the other hand, the volume of the first sound cavity cannot be adjusted at any time. By setting the shell cover, the size of the first sound cavity can be adjusted by adjusting the size of the shell cover, which is simple and convenient and meets the above-mentioned adjustment requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0035] Figure 1 An exploded schematic diagram of a first embodiment of a loudspeaker provided by the present invention;

[0036] Figure 2for Figure 1 A schematic cross-sectional view of the speaker;

[0037] Figure 3 for Figure 1 Another cross-sectional schematic diagram of the middle speaker;

[0038] Figure 4 for Figure 1 A schematic diagram of the planar structure of the loudspeaker;

[0039] Figure 5 for Figure 1 Another planar structural schematic diagram of the loudspeaker;

[0040] Figure 6 for Figure 1 A schematic diagram of the three-dimensional structure of a part of the structure;

[0041] Figure 7 for Figure 1 An exploded schematic diagram of the rigid connector and the elastic support;

[0042] Figure 8 for Figure 1 Schematic diagram of the assembly structure of the rigid connecting member and the elastic supporting member;

[0043] Fig. 9 for Figure 1 A schematic plan view of an embodiment of the relative position relationship between the middle diaphragm, the second vibration plate and the voice coil;

[0044] Fig.10 for Fig. 9 Schematic diagram of the three-dimensional structure of the middle diaphragm;

[0045] Fig.11 for Fig. 9 A schematic diagram of the three-dimensional structure of the second vibration plate in FIG.

[0046] Fig.12 for Figure 1 A schematic plan view of another embodiment of the relative position relationship between the middle diaphragm, the second vibration plate and the voice coil;

[0047] Fig.13 for Fig.12 Schematic diagram of the three-dimensional structure;

[0048] Fig.14 for Fig.13 Explosion diagram of

[0049] Fig.15 A cross-sectional schematic diagram of a second embodiment of the loudspeaker provided by the present invention;

[0050] Fig.16 for Fig.15Another cross-sectional schematic diagram of the loudspeaker in;

[0051] Fig.17 A schematic cross-sectional view of a first embodiment of an electronic device provided by the present invention;

[0052] Fig.18 A schematic cross-sectional view of a third embodiment of the loudspeaker provided by the present invention;

[0053] Fig.19 A schematic cross-sectional view of a fourth embodiment of the loudspeaker provided by the present invention;

[0054] Fig. 20 for Fig.19 Another cross-sectional schematic diagram of the loudspeaker in;

[0055] Fig.21 A schematic cross-sectional view of a second embodiment of the electronic device provided by the present invention.

[0056] Description of Figure Numbers:

[0057] 1000, electronic equipment; 100, loudspeaker; 1, magnetic circuit system; 1a, magnetic gap; 11, central magnet; 111, second protrusion; 12, peripheral magnet; 121, extension; 13, clearance hole; 14, yoke; 141, avoidance groove; 2, vibration system; 21, first diaphragm; 211, first folding ring; 212, first vibration plate; 22, voice coil; 221, first protrusion; 23, middle diaphragm; 231, deformation part; 232, first extension; 24, second diaphragm; 241, second folding ring; 242, second vibration plate; 2421, main body; 2422, bending part; 2422a, Inclined section; 2423, second extension section; 25, 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 cavity; 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, elastic arm; 9, connecting plate; 10, shell cover; 101, rear sound outlet channel; 200, cavity; 201, electronic device sound outlet hole.

[0058] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0059] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0060] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0061] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0062] With the rapid development of the consumer electronics industry, people's requirements for electronic products are constantly increasing. In addition to the performance differences of the products themselves, their portability and comfort are several aspects that people focus on. At present, it is difficult for conventional speaker solutions to take into account multiple design requirements such as high performance and lightness at the same time. When designing to meet the above design requirements, it is also necessary to consider its specific usage scenarios to ensure its performance.

[0063] In view of this, the present invention proposes a speaker, see Figures 1 to 21 , is an embodiment of the speaker proposed in this application, and the speaker will be described in detail below with reference to specific drawings.

[0064] See also Figures 1 to 4 as well as Fig.15 , Fig.16 , Fig.19 , Fig. 20The loudspeaker 100 comprises a shell 3, a shell cover 10a, and a magnetic circuit system 1 and a vibration system 2 connected to the shell 3, wherein the magnetic circuit system 1 has a magnetic gap 1a, and the vibration system 2 comprises a first diaphragm 21, a voice coil 22, a middle diaphragm 23, a second diaphragm 24 and a rigid connector 25, wherein the first diaphragm 21 has a first side and a second side in a first direction, and an end of the shell corresponding to the first side of the first diaphragm 21 is open, and the outer peripheral side of the first diaphragm 21 is connected to the shell 3, and the shell cover 10a is disposed on the open end of the shell 3 to define a first sound outlet cavity 4a between the first side of the first diaphragm 21 and the shell cover 10a, and a first sound outlet hole 5 communicating with the first sound outlet cavity 4a is opened on the shell cover 10a; the voice coil 22 is disposed on the second side of the first diaphragm 21 and connected to the first diaphragm 21, and the voice coil 22 is at least partially disposed in the magnetic gap 1a; The diaphragm 23 is arranged in an annular shape and is located on the second side of the first diaphragm 21, and the outer peripheral side of the middle diaphragm 23 is connected to the outer shell 3; the second diaphragm 24 is arranged in an annular shape and is located on the side of the middle diaphragm 23 away from the first diaphragm 21, the second diaphragm 24 includes a second folded ring 241 and a second vibration plate 242, the outer peripheral side of the second folded ring 241 is connected to the outer shell 3, the second vibration plate 242 includes a main body 2411 connected to the inner peripheral side of the second folded ring 241, and a bent portion 2412 connecting the main body 2411 and the inner peripheral side of the middle diaphragm 23, and a second sound output cavity 6a is defined between the middle diaphragm 23 and the second diaphragm 24, and a second sound output hole 7 is opened on the outer shell 3, and the second sound output hole 7 is connected to the second sound output cavity 6a; the rigid connecting member 25 is connected between the second diaphragm 24 and the voice coil 22 and is connected to the end of the voice coil 22 away from the first diaphragm 21.

[0065] In the technical solution of the present invention, a middle diaphragm 23 and a second diaphragm 24 are added to the conventional speaker 100, and a second sound output cavity 6a is defined by the middle diaphragm 23 and the second diaphragm 24, in order to drive the second diaphragm 24 to vibrate through the voice coil 22, thereby changing the volume of the second sound output cavity 6a to promote air vibration and emit sound. In this way, the voice coil 22 can be used to drive the first diaphragm 21 to promote the air vibration in the first sound output cavity 4a, and at the same time drive the second diaphragm 24 to promote the air vibration in the second sound output cavity 6a, thereby increasing the effective vibration area of ​​the speaker 100, thereby improving the performance of the speaker 100. On this basis, the first diaphragm 21 can be set to be exposed to the outside, so as to directly vibrate the external air of the speaker 100 to achieve sound, but its sound performance is seriously affected by the complexity of environmental factors, which makes the use of the speaker 100 unstable, and then leads to unstable use performance of the speaker 100. Therefore, in this application, a shell cover 10a is also provided on the first side of the first diaphragm 21 set to be exposed to the outside, so as to define the first sound cavity 4a with the first diaphragm 21 exposed to the outside of the shell 3 through the shell cover 10a fixed to the shell 3, so as to fix the structure of the first sound cavity 4a, and then ensure the vibration sound performance of the first diaphragm 21. It should be noted here that the structure of defining the first sound cavity 4a with the first diaphragm 21 set to be exposed is not limited to the shell cover 10a set on the shell 3, but can also be other structures, such as the shell of the electronic device 1000 installed with the speaker 100, which can meet the use requirements. In this embodiment, the shell cover 10a structure is proposed to stabilize the performance of the speaker 100 itself and reduce the influence of other structures on the performance of the speaker 100 in the use scenario of the speaker 100. In addition, the first diaphragm 21 can also be set as a non-exposed structure, that is, the first diaphragm 21 is set in the shell 3 to define the first sound cavity 4a with the shell 3, which also meets the above-mentioned structural requirements for stable performance. However, compared with the shell cover 10a structure, on the one hand, the installation and fixation of the first diaphragm 21 built into the shell 3 is inconvenient, and on the other hand, the volume of the first sound cavity 4a cannot be adjusted at any time. By setting the shell cover 10a, the size of the first sound cavity 4a can be adjusted by adjusting the size of the shell cover 10a, which is simple and convenient and meets the above-mentioned adjustment requirements. Of course, the speaker 100 can also be a structure that keeps the first diaphragm 21 exposed, for example Figure 2 The first embodiment shown in Fig.12 The problems existing in the third embodiment have been described above and will not be repeated here.

[0066] Specifically, the voice coil 22 is arranged in the magnetic gap 1a, and can vibrate under the control of electricity, and the voice coil 22 is intended to be connected with the first diaphragm 21 and the second diaphragm 24, so that when the voice coil 22 vibrates, it can drive the first diaphragm 21 and the second diaphragm 24 to vibrate at the same time, so as to form a double diaphragm structure of the vibration system 2, so that the first diaphragm 21 makes sound through the first sound cavity 4a, and the second diaphragm 24 makes sound through the second sound cavity 6a, and the two share a rear sound cavity, so that the effective vibration area of ​​the vibration system 2 is effectively increased, and then in the structure of the speaker 100 of the same size, the speaker 100 proposed in the present application has better acoustic performance, and on the basis of the same acoustic performance, the structure of the speaker 100 proposed in the present application can have a smaller structural size, so the small-sized and high-performance speaker 100 proposed in the present application is obtained to meet the needs. The connection between the middle diaphragm 23 and the voice coil 22 has been described above, and will not be repeated here.

[0067] It can be understood that the present application configures the second diaphragm 24 as a combination structure of a second folded ring 241 and a second vibration plate 242, and configures the second vibration plate 242 to have a bending portion 2422 to extend toward the middle diaphragm 23 and be connected to the inner circumference of the middle diaphragm 23. On the one hand, the second vibration plate 242 can serve as a connecting seal between the middle diaphragm 23 and the second diaphragm 24, defining a second sound output cavity 6a located between the middle diaphragm 23 and the second diaphragm 24. On the other hand, it serves as a driving connection to connect the voice coil 22 to drive the middle diaphragm 23 and the second folded ring 241 to vibrate, thereby meeting the above sound vibration requirements. The middle diaphragm 23 is connected by the second vibration plate 242, and there is no need to connect the middle diaphragm 23 to the voice coil 22, thereby simplifying the installation and layout structure of the middle diaphragm 23.

[0068] In addition, the second diaphragm 24 and the voice coil 22 may be connected by providing an independent connector or by adjusting the main structure of the second diaphragm 24 so as to be directly connected by its main structure. In the present embodiment, an independent rigid connector 25 is provided for connection to facilitate structural arrangement and product assembly. Specifically, the connection point between the rigid connector 25 and the voice coil 22 may not be limited, and it is sufficient to link the vibration of the voice coil 22 and the second diaphragm 24, that is, it may be connected to the side of the voice coil 22. However, in such a configuration, the rigid connector 25 will occupy the width of the magnetic gap 1a and affect the magnetic field in the magnetic gap 1a acting on the voice coil 22, thereby affecting the vibration performance of the voice coil 22 and further affecting the sound performance of the speaker 100. Therefore, in the present embodiment, the rigid connector 25 is provided at one end of the voice coil 22 away from the first diaphragm 21 to avoid the rigid connector 25 being located on the side of the voice coil 22, occupying the width of the magnetic gap 1a and affecting the magnetic field in the magnetic gap 1a acting on the voice coil 22. It can be understood that the rigid connector 25 is made of metal material such as stainless steel or a polymer material with a certain strength such as carbon fiber.

[0069] Based on the structure of the loudspeaker 100 proposed in the present application, a dual-cavity structure of a first sound outlet cavity 4a and a second sound outlet cavity 6a is formed. Therefore, the first sound outlet hole 5 corresponding to the first sound outlet cavity 4a and the second sound outlet hole 7 corresponding to the second sound outlet cavity 6a can be arranged relatively to each other or independently, depending on the actual structural requirements. Specifically, when the first sound outlet hole 5 and the second sound outlet hole 7 are arranged relatively to each other, the first sound outlet space 4a and the second sound outlet cavity 6a are arranged independently, and the sound waves of the second sound outlet cavity 6a are radiated to the outside through the second sound outlet hole 7 and the first sound outlet hole 5. When the first sound outlet hole 5 and the second sound outlet hole 7 are arranged independently, it is only necessary to ensure that the second sound outlet hole 7 is arranged corresponding to the first sound outlet cavity 4a, and the sound waves of the second sound outlet cavity 6a are radiated outward through the second sound outlet hole 7, the first sound outlet space 4a and the first sound outlet hole 7.

[0070] Among them, the middle diaphragm 23 is a flexible member, and the effective vibration area of ​​the middle diaphragm 23 is smaller than the effective vibration area of ​​the second diaphragm 24. It can be understood that in the second sound cavity 6a defined between the second diaphragm 24 and the middle diaphragm 23, the second diaphragm 24 provides a sound wave with the same phase as the sound wave radiated by the first diaphragm 21 during the vibration process, and the middle diaphragm 23 follows the second diaphragm 24 to provide a sound wave with the opposite phase to the sound wave radiated by the first diaphragm 21 during the vibration process, that is, the sound performance of the second sound cavity 6a is weakened. Therefore, on the basis of meeting the structural and functional requirements, the effective vibration area of ​​the middle diaphragm 23 should be set to be smaller than the effective vibration area of ​​the second diaphragm 24, so that the sound wave of the second sound cavity 6a can be in the same phase as the sound wave of the first sound cavity 4a and positively superimposed, thereby improving the FR (frequency response) of the speaker 100. Specifically, in one embodiment of the present application, the ratio of the effective vibration area of ​​the middle diaphragm 23 to the effective vibration area of ​​the second diaphragm 24 is limited to between 1:3 and 1:1.5, so as to avoid the situation where the ratio is too large, the size of the middle diaphragm 23 is too large and has a great impact on the sound performance of the second sound cavity 6a, and at the same time avoid the situation where the ratio is too small, the size of the middle diaphragm 23 is too small and needs to meet a larger amplitude, which requires a high degree of flexibility of its material, thereby leading to the problem of high cost.

[0071] Further optionally, in the projection along the first direction, the width of the deformation portion 231 of the middle diaphragm 23 is greater than or equal to the width of the deformation portion of the second fold ring 241 .

[0072] It can be understood that the width of the deformation portion 231 of the middle diaphragm 23 is greater than or equal to the width of the deformation portion of the second fold ring 241, which helps to improve the compliance of the middle diaphragm 23 and prevent the middle diaphragm 23 from hindering the vibration of the second diaphragm 24 during the following process; on the other hand, the outer connection portion of the middle diaphragm 23 forms a fixed end with the outer shell 3, and only the inner connection portion is a free end, so the effective vibration area of ​​the middle diaphragm 23 during the vibration process is relatively small; at the same time, the second diaphragm 24 includes a second fold ring 241 made of a flexible material and a second vibration plate 242 made of a rigid material, both ends of the second vibration plate 242 are free ends, and its projected size along the first direction is its effective vibration area. Compared with the second fold ring 241 (the calculation of its effective vibration area is the same as that of the middle diaphragm 23), the second vibration plate 242 contributes more to the effective vibration area of ​​the second diaphragm 24. At this time, the width of the deformation portion of the second fold ring 241 is smaller than the width of the deformation portion 231 of the middle diaphragm 23, so the size of the second vibration plate 242 is increased, the effective vibration area of ​​the second vibration membrane 24 is increased, and the vibration performance of the second vibration membrane 24 is effectively improved.

[0073] Specifically, in another embodiment of the present application, the ratio of the width of the deformation portion 231 of the middle diaphragm 23 to the width of the deformation 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 performance of the second sound cavity 6a are better.

[0074] Furthermore, the first diaphragm 21 includes a first fold ring 211 and a first vibration plate 212, the outer edge of the first fold ring 211 is connected to the outer shell 3, the inner edge of the first fold ring 211 is connected to the first vibration plate 212, and the compliance of the second fold ring 241 and the compliance of the first fold ring 211 are both smaller than the compliance of the middle diaphragm 23.

[0075] It can be understood that the compliance of the middle diaphragm 23 is greater than the compliance of the second fold ring 241 and the compliance of the first fold ring 211. At this time, the middle diaphragm 23 only plays the role of isolation and sealing, 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.

[0076] In the above embodiments, the first vibration plate 212 and the second vibration plate 242 can be made of metal materials such as magnesium-aluminum alloy, magnesium-lithium alloy, etc. The middle diaphragm 23 is made of flexible materials such as single-layer PEEK (polyetheretherketone) film, composite PEEK (polyetheretherketone) film, etc. 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 middle diaphragm 23, and can be selected according to actual needs during use.

[0077] In addition, the bending portion 2422 includes an inclined section 2422a arranged at an angle with the first direction, and the inclined section 2422a is connected to the main body 2421. The second vibration plate 242 is intended to be connected to the rigid connector 25 while being able to bend toward the first diaphragm 21 to be connected to the middle diaphragm 23. Therefore, the specific setting structure of the bending portion 2422 is not limited here, and it can be extended toward the first diaphragm 21 after bending and connected to the middle diaphragm 23. In this embodiment, the inclined section 2422a is arranged on the bending portion 2422, so that the second vibration plate 242 forms a plurality of bending points, thereby reducing the bending angle of a single bending point, so as to facilitate the structural forming of the second vibration plate 242. In addition, the inclined section 2422a can also improve the rigidity of the second vibration plate 242 in the horizontal direction (i.e., perpendicular to the vibration direction of the vibration system), thereby improving the vibration performance of the second diaphragm 24 and improving the feasibility of molding the second vibration plate 242. The inclined section 2422a also facilitates the positioning connection between the second vibration plate 242 and the second fold ring 241 to improve the connection accuracy.

[0078] For further information, see Figure 13 to Figure 14 The magnetic circuit system 1 has an extension corresponding to the inclined section 2422a, and 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 vibration plate. The inclined section 2422a is further away from the magnetic circuit system 1 relative to the inner edge of the second vibration plate 242. Based on this, the magnetic circuit system 1 can be provided with an extension at a position corresponding to the inclined section 2422a. On the basis of 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 vibration plate 242, the extension makes the outer edge of the magnetic circuit system 1 tilt and expand outward, thereby increasing the size of the magnetic circuit system 1, further improving the BL value of the speaker 100, and improving the sound effect of the speaker 100.

[0079] Also, see Figures 1 to 5 as well as Fig.18The magnetic circuit system 1 includes a yoke 14, a central magnet 11 and a peripheral magnet 12. The central magnet 11 is arranged on the yoke 14; the peripheral magnet 12 is arranged on the yoke 14 and is located at the periphery of the central magnet 11, and 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; wherein, the yoke 14 is provided with an avoidance groove 141 corresponding to the position of the rigid connector 25. Generally, the magnetic circuit system 1 is equipped with a yoke 14, especially the magnetic circuit system 1 in a small and compact electronic product, to prevent the exposure of the magnetic field from affecting the normal operation of external electronic components. In this embodiment, a 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 yoke 14. On this basis, since the rigid connector 25 is fixed to the end of the voice coil 22 away from the first diaphragm 21, when the voice coil 22 vibrates, the rigid connector 25 has an active stroke close to the yoke 14. In this embodiment, in order to further reduce the height of the speaker 100, an avoidance groove 141 is opened on the yoke 14 to avoid the rigid connector 25, so that the distance between the end face of the yoke 14 and the lower end of the rigid connector 25 can be reduced, thereby reducing the height of the speaker 100.

[0080] For further information, see Figure 5 , the avoidance groove 141 is a through hole that penetrates the yoke 14. On the one hand, the avoidance groove 141 is provided through the yoke 14, which can give the rigid connector 25 the maximum avoidance dimension, so as to reduce the height dimension of the loudspeaker 100 as much as possible and meet the structural setting required by the present application. On the other hand, the avoidance groove 141 penetrates the yoke 14, so that the rear sound cavity defined by the first diaphragm 21 and the middle diaphragm 23 and the rear sound cavity defined by the second diaphragm 24 and the yoke 14 can be connected with the outside to avoid the rear sound cavity from being closed, thereby preventing the internal gas from forming air pressure when the voice coil 22 drives the first diaphragm 21, the second diaphragm 24 and the middle diaphragm 23 to vibrate, so as to avoid affecting the performance of the loudspeaker 100. It should be noted here that an opening connecting the above-mentioned rear sound cavity is generally provided on the housing 3. In this embodiment, the avoidance groove 141 provided through the yoke 14 is directly used to simplify the structure of the loudspeaker 100.

[0081] In addition, the deformation portion 231 of the middle diaphragm 23 is convexly arranged toward the second diaphragm 24. The deformation portion 231 of the middle diaphragm 23 has been described above and will not be described here one by one. The deformation portion 231 can be convexly arranged toward the first diaphragm 21 or the second diaphragm 24, both of which meet the functional requirements. In this embodiment, the deformation portion 231 is set to be convexly arranged toward the second diaphragm 24 to avoid affecting the vibration stroke of the first diaphragm 21, that is, to avoid interfering with the vibration sound of the first diaphragm 21, so that the distance between the first diaphragm 21 and the middle diaphragm 23 can be reduced, thereby achieving the purpose of reducing the size of the speaker 100 in the first direction and achieving a lightweight and thin structural design.

[0082] Furthermore, the first diaphragm 21 includes a first fold 211, and the first fold 211 is arranged to protrude toward the middle diaphragm 23. Since the deformation portion 231 is arranged to protrude toward the second diaphragm 24, so that the deformation portion 231 does not interfere with the space between the middle diaphragm 23 and the first diaphragm 21, in order to further make the speaker 100 thinner and lighter, in this embodiment, the first fold 211 arranged on the first diaphragm 21 is arranged to protrude toward the middle diaphragm 23, so that the space between the first diaphragm 21 and the middle diaphragm 23 is used to accommodate the protruding first fold 211, thereby achieving the purpose of reducing the height of the speaker 100.

[0083] Furthermore, the deformation part 231 is arranged relative to the deformation part of the first fold ring 211. Based on the structures of the first fold ring 211 and the deformation part 231 described above, this embodiment defines the relative positional relationship between the deformation part 231 and the first fold ring 211. Specifically, when the deformation part 231 is arranged to protrude toward the second diaphragm 24, a groove must be formed on the side thereof facing the first diaphragm 21. In this embodiment, the first fold ring 211 and the deformation part 231 are arranged relative to each other. On the one hand, the vibration of the first fold ring 211 is avoided by the groove to avoid structural interference. On the other hand, the interval between the first diaphragm 21 and the middle diaphragm 23 can be further reduced, thereby further reducing the height of the speaker 100 and achieving further requirements for thin and light design.

[0084] In addition, the second fold ring 241 is arranged to protrude toward one side of the middle diaphragm 23, and the second fold ring 241 and the deformation part 231 are arranged to be offset in the second direction, and the second direction is perpendicular to the first direction. In order to prevent the second fold ring 241 from encroaching on the space on the side of the second diaphragm 24 facing away from the middle diaphragm 23, and to avoid possible structural interference, the present application sets the second fold ring 241 to protrude toward the middle diaphragm 23. At the same time, combined with the structural basis that the deformation part 231 is arranged to protrude toward the second diaphragm 24, the present embodiment sets the second fold ring 241 and the deformation part 231 to be offset, so as to avoid the relative interference between the two and cause the height of the speaker 100 to increase, and further meet the requirements of lightweight and thin structure setting.

[0085] In addition, the outer shell 3 includes a first shell 31 and a second shell 32 which are arranged opposite to each other in a first direction; the outer peripheral side of the first diaphragm 21 is fixed to the first shell 31, the magnetic circuit system 1 is fixed to the second shell 32, the outer peripheral side of the second fold ring 241 is clamped between the first shell 31 and the second shell 32, the outer peripheral side of the middle diaphragm 23 is fixed to the first shell 31, and the second sound outlet 7 is opened in the first shell 31. The structural composition of the shell 3 is mainly based on the actual production and assembly requirements. It can be a combination of multiple shell parts or an integral shell. In this embodiment, the 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, and the first diaphragm 21 and the middle diaphragm 23 are fixed to the first shell 31, so that the voice coil 22 connected to the first diaphragm 21 and the second diaphragm 24 connected to the middle diaphragm 23 are also fixed to the first shell 31. In this way, during the assembly production process, it is convenient to install the first diaphragm 21, the voice coil 22, the middle diaphragm 23 and the second diaphragm 24 in the first shell 31, and it is also convenient to install the magnetic circuit system 1 in the second shell 32. Finally, the first shell 31 and the second shell 32 are covered, and the second folding ring 241 is clamped and fixed when the first shell 31 and the second shell 32 are covered, so that the assembly of the overall structure of the speaker 100 is completed, which is convenient for assembly operation.

[0086] Further, the first shell 31 includes a main body section 311 and a bending section 312, the main body section 311 is arranged in a ring shape; the bending section 312 is located at one end of the main body section 311 away from the second shell 32 and extends toward the inner side of the main body section 311, and the first diaphragm 21 and the middle diaphragm 23 are fixed on both sides of one end of the bending section 312 away from the main body section 311; wherein, the second sound outlet 7 is arranged in the main body section 311 or the bending section 312. In order to meet the relative size requirements of the middle diaphragm 23 and the second diaphragm 24, in this embodiment, the bending section 312 is bent at one end of the main body section 311, so that the fixing point of the middle diaphragm 23 extends inwardly relative to the second diaphragm 24 to meet the structural size requirements. On this basis, the second sound outlet 7 connected to the second sound outlet cavity 6a can be arranged in the main body section 311 or in the bending section 312. The specific setting point is mainly based on the actual use requirements of the speaker 100 and is not specifically limited here.

[0087] Furthermore, in an embodiment of the specific position setting of the second sound outlet hole 7, the second sound outlet hole 7 is provided in the main body section 311, and correspondingly, the outer peripheral side of the first diaphragm 21 and the outer peripheral side of the middle diaphragm 23 are fixed on both sides of the bending section 312 away from the end of the main body section 311, or the outer peripheral side of the middle diaphragm 23 is clamped between the outer peripheral side of the first diaphragm 21 and the bending section 312.

[0088] In addition, in another embodiment of the specific position setting of the second sound outlet hole 7, the second sound outlet hole 7 is arranged in the bending section 312, and the first shell 31 also includes a connecting frame 313 connected to the end of the bending section 312 away from the main section 311, the outer peripheral side of the first diaphragm 21 is connected to one end of the connecting frame 313, and the outer peripheral side of the middle diaphragm 23 is connected to the other end of the connecting frame 313 or the bending section 312.

[0089] In addition, a first flange connected to the first housing 31 is provided on the outer peripheral side of the first diaphragm 21; a second flange connected to the first housing 31 is provided on the outer peripheral side of the second diaphragm 24. 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 the waterproof ability.

[0090] Also, see Figures 6 to 8 The loudspeaker 100 also includes an elastic support member 8, which includes an external fixing portion 81, an internal fixing portion 82, and an elastic arm 83 connecting the external fixing portion 81 and the internal fixing portion 82. The external fixing portion 81 is connected to the outer shell 3, and a first electrical connection portion 811 is provided thereon. The internal fixing portion 82 is supported and connected to the second diaphragm 24 and the voice coil 22, and a second electrical connection portion 821 electrically connected to the voice coil 22 is provided on the internal fixing portion 82. It can be understood that in order to realize the vibration of the voice coil 22 in the magnetic gap 1a according to a certain vibration requirement, thereby emitting the desired sound, the voice coil 22 needs to be connected to an electrical signal, that is, an electrical connector needs to be provided to connect the voice coil 22 with an external signal source of the speaker 100. Specifically, the electrical connector can be provided in a variety of ways, such as a flexible wire structure, or a rigid connection structure arranged along its vibration direction and capable of synchronous movement with the voice coil 22. No specific limitation is made herein, as long as the voice coil 22 can be connected to an external signal source. In this embodiment, an elastic support member 8 is provided. On the one hand, the voice coil 22 is connected to an external signal source through the elastic support member 8. On the other hand, the elastic support member 8 is provided to realize the vibration of the second diaphragm 24 in the system 2. The constraint in one direction, i.e., the vibration direction, can better suppress the poor performance caused by polarization under large amplitude. Specifically, the inner fixing part 82 and the outer fixing part 81 connected by the elastic arm 83, the inner fixing part 82 is fixed to the outer shell 3, and the outer fixing part 81 is fixed between the voice coil 22 and the second diaphragm 24, so as to achieve the above-mentioned constraint effect through the elasticity of the elastic arm 83 itself, and at the same time, a first electrical connection part 811 connected to an external signal source is arranged on the outer fixing part 81, and a second electrical connection part 821 connected to the voice coil 22 is arranged on the inner fixing part 82. Through the conductivity of the elastic arm 83, the inner fixing part 82 and the outer fixing part 81, the conduction between the first electrical connection part 811 and the second electrical connection part 821 is achieved, thereby meeting the above structural and functional requirements.

[0091] Specifically, the outer fixing portion 81 is arranged in an annular shape, and the inner fixing portion 82 is arranged on the inner side of the outer fixing portion 81, and is connected to the inner side of the outer fixing portion 81 through the elastic arm 83. The structural arrangement of the outer fixing portion 81 and the inner fixing portion 82 is not specifically limited here, and can satisfy the connection of the elastic arm 83 to achieve the constraint effect described above, and at the same time electrically connect the first electrical connection portion 811 and the second electrical connection portion 821. In this embodiment, the outer fixing portion 81 is arranged in an annular structure to stably cooperate with the outer shell 3, thereby improving the connection and support stability of the elastic support member 8. Based on this, the elastic arm 83 connects the inner fixing portion 82 and the inner side of the outer fixing part 81, and according to the ring-shaped structure of the outer fixing part 81 and the structural stability it brings, the elastic arm 83 can extend along the inner edge of the outer fixing part 81 to increase the length of the elastic arm 83, thereby improving the reliability of the second diaphragm 24 when working with a large amplitude, that is, the outer fixing part 81 is set to have alternating short axis sides and long axis sides, the elastic arm 83 is led out from the side of the short axis side of the inner fixing part 82 and extends along the long axis side after being bent, and the elastic arm 83 is connected to the central area of ​​the long axis side, thereby increasing the length of the elastic arm 83 and increasing its stress to improve reliability.

[0092] In addition, the internal fixing portion 82 includes a main body portion and an extension portion extending from the main body portion toward the voice coil 22, the main body portion is connected to the second vibration plate 242, the extension portion is connected to the voice coil 22, and a second electrical connection portion 821 is provided on the extension portion or the main body portion. The setting point of the second electrical connection portion 821 on the internal fixing portion 82 may not be limited, and the internal fixing portion 82 is used to connect the second vibration plate 242 and the voice coil 22, that is, the internal fixing portion 82 at least includes a main body portion for connecting to the second vibration plate 242, and an extension portion extending from the main body portion to connect to the voice coil. The second electrical connection portion 821 may be provided on the main body portion or on the extension portion, and the specific setting point of the second electrical connection portion 821 on the main body portion or the extension portion is also not limited, as long as the functional requirements are met.

[0093] In addition, the first electrical connection part 811 is used to connect to the external signal source as described above, so in this embodiment, the first electrical connection part 811 is also arranged on the outer peripheral side of the external 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, and the structure has strong stability. Of course, the first electrical connection part 811 can also be connected to the external signal source by setting other connecting structures. In this way, the setting position of the first electrical connection part 811 is not limited, and the electrical connection function can also be realized, but it is obviously more cumbersome and impractical.

[0094] Furthermore, the rigid connector 25 is connected to the side of the inner fixing portion 82 facing away from the second diaphragm 24. The inner fixing portion 82 and the rigid connector 25 may be independent structures, that is, they are respectively connected to the voice coil 22 and the second diaphragm 24, or they may have a certain relative position relationship. In this embodiment, considering that the inner fixing portion 82 and the rigid connector 25 have the same connection and support functions, the rigid connector 25 is connected to the inner fixing portion 82 to jointly connect the voice coil 22 and the second diaphragm 24, so that the connection structure between the inner fixing portion 82 and the voice coil 22 can be strengthened through the rigid connector 25, thereby ensuring the electrical connection stability between the second electrical connection portion 821 on the inner fixing portion 82 and the voice coil 22. At the same time, the inner fixing portion 82 is clamped between the rigid connector 25 and the voice coil 22, so that the distance between the inner fixing portion 82 and the magnetic circuit system 1 is increased. The second electrical connection portion 821 is arranged on the side of the inner fixing portion 82 away from the rigid connector 25, and the lead of the voice coil 22 is spot-welded to the second electrical connection portion 821. In this way, only a part of the magnetic circuit system 1 needs to be arranged to avoid the rigid connector 25, reducing the avoidance of the lead of the voice coil 22, which is conducive to a thin configuration.

[0095] Also, see Figures 1 to 4 as well as Fig.18 The magnetic circuit system 1 includes a central magnet 11 and a peripheral magnet 12. The peripheral magnet 12 is arranged at the periphery of the central magnet 11 and defines a magnetic gap 1a between the peripheral magnet 12 and the central magnet 11; wherein the peripheral magnet 12 is provided with a clearance hole 13 for the elastic support member 8 and the rigid connection member 25 to pass through. A magnetic field environment required for the vibration of the voice coil 22 is formed between the central magnet 11 and the peripheral magnet 12. Generally, the peripheral magnet 12 is composed of a plurality of magnets, which are arranged on the peripheral side of the central magnet 11. There are intervals between the plurality of magnets to form the clearance hole 13. The elastic support member 8 and the rigid connection member 25 can extend from the clearance hole 13 into the magnetic gap 1a and connect with the voice coil 22 to meet the structural and functional requirements.

[0096] For further information, see Figures 9 to 11 In one embodiment, the middle diaphragm 23 has a first extension portion 232 extending to the clearance hole 13, and the second vibration plate 242 has a second extension portion 2423 extending to the clearance hole 13, and the first extension portion 232 and the second extension portion 2423 are connected correspondingly. In this way, on the one hand, the space at the clearance hole 13 is utilized to further increase the size of the second vibration plate 242 and the cavity size of the second sound cavity 6a enclosed by the second vibration plate 242 and the middle diaphragm 23, so as to further improve the sound effect without increasing the height of the speaker 100. On the other hand, by providing the first extension portion 232 and the second extension portion 2423, the structural strength of the middle diaphragm 23 and the second vibration plate 242 is also improved.

[0097] Also, see Figure 12 to Figure 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, and the first protrusion 221 and the second protrusion 111 are arranged correspondingly. Different from the scheme of setting the first extension 232 and the second extension 2423 to utilize the space at the clearance hole 13 in the above embodiment, the first protrusion 221 and the second protrusion 111 are arranged to utilize the space at the clearance hole. In this way, the outer 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 improving the BL value (the product of the magnetic gap magnetic field strength B and the voice coil wire length L) of the speaker 100, so that the speaker 100 has a better transient response and higher sensitivity, making the sound clearer and more natural.

[0098] In addition, the first shell 31 and the second shell 32 are metal shells, the yoke 14 and the second shell 32 are integrally formed, and the first shell 31 and the second shell 32 are welded; or, the first shell 31 is a metal shell, and the yoke 14 and the first shell 31 are welded. It can be understood that the yoke 14 can be used as a part of the shell 3, or it can be set independently of the shell 3, and it can achieve its own function of blocking the magnetic field. Therefore, in some embodiments of the present application, the yoke 14 can be integrally formed with the second shell 32, and then the second shell 32 is connected to the first shell 31 to achieve the installation of the yoke 14, and in another embodiment of the present application, the yoke 14 can be welded to the first shell 31 to form a complete shell 3, that is, the yoke 14 is used as the second shell 32, and combined with the first shell 31 to form the shell 3. The specific setting method is mainly based on actual needs and is not specifically limited here. In addition, in an embodiment in which the yoke 14 is used as the second shell 32, the yoke 14 has a welding protrusion extending toward the first shell 31; or, the first shell 31 has a welding protrusion extending toward the yoke 14; or, the first shell 31 and the yoke 14 are welded together by a welding sheet so that the yoke 14 and the first shell 31 can be stably connected, which is also not specifically limited here.

[0099] For further information, see Figures 6 to 8, the outer fixing portion 81 and the outer peripheral side of the second diaphragm 24 are clamped between the first shell 31 and the second shell 32. The specific structure of the elastic support member 8 has been described in detail above, and will not be repeated here. Based on the above description, the voice coil 22 and the second diaphragm 24 are fixed to the first shell 31, and the elastic support member 8 connected to the voice coil 22 and the second diaphragm 24 should also be fixed to the first shell 31 first, and then covered with the second shell 32 to complete the assembly of the speaker 100. At this time, based on the structural setting that the second diaphragm 24 is located between the first shell 31 and the second shell 32, the first electrical connection portion 811 on the outer fixing portion 81 of the elastic support member 8 needs to extend out of the shell 3. Therefore, in this embodiment, the outer fixing portion 81 is set to be clamped between the second diaphragm 24 and the second shell 32 to facilitate the layout of the first electrical connection portion 811.

[0100] Also, see Figures 1 to 4 as well as Fig.18 The first diaphragm 21 includes a first folded ring 211 and a first vibration plate 212. The outer peripheral side of the first folded ring 211 is connected to the housing 3, and the inner peripheral side of the first folded ring 211 is connected to the first vibration plate 212. The first vibration plate 212 is integrally provided with a protrusion connected 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 vibration 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 can be connected through the connecting plate 9. In practice, the structural size of the first diaphragm 21 and the distance between the first diaphragm 21 and the voice coil 22 are mainly determined. The first diaphragm 21 can be connected to the voice coil 22 and its sealing can be ensured.

[0101] See also Fig.17 as well as Fig.21 The present application also proposes an electronic device 1000, wherein the electronic device 1000 includes a cavity 200 and a speaker 100, wherein the cavity 200 is provided with an electronic device sound outlet hole 201; the specific structure of the speaker 100 refers to the above embodiment, and since the electronic device 1000 adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here, and the first sound outlet cavity 4a and the second sound outlet cavity 6a are both connected to the electronic device sound outlet hole 201.

[0102] Specifically, a first rear sound cavity 4b is defined between the first diaphragm 21 and the middle diaphragm 23, a second rear sound cavity 6b is defined on the side of the second diaphragm 24 facing away from the middle diaphragm 23, the first rear sound cavity 4b is connected with the second rear sound cavity 6b, the speaker 100 is provided with a rear sound channel 101, the first rear sound cavity 4b and the second rear sound cavity 6b are connected with the cavity 200 through the rear sound channel 101, and the effective volume of the cavity 200 is ≥2.5cc.

[0103] In the electronic device of the present application, the rear sound cavity (the first rear sound cavity 4b and the second rear sound cavity 6b) of the speaker 100 is connected with the cavity 200 of the electronic device through the rear sound channel 101, and the cavity 200 of the electronic device is used to expand 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 and reduces the reaction force exerted on the air in the rear sound cavity by the vibration system 2 when the effective vibration area is increased during the vibration process, thereby realizing large-amplitude vibration of the vibration system 2 and improving the sound quality of the speaker 100; and 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.

[0104] Based on the specific structure of the speaker 100 described above, the first rear sound cavity 4b is connected to the second rear sound cavity 6b, and the rear sound channel 101 can be set on the housing 3 of the speaker 100 or on the magnetic circuit system 1. When the rear sound channel 101 is set on the magnetic circuit system 1, the rear sound channel 101 is a through hole that penetrates the yoke 14. Of course, other methods can also be used to connect the rear sound cavity with the cavity 200, which is not specifically limited here. Based on this, in order to avoid the stagnant air in the closed cavity 200 connected to the first rear sound cavity 4b and the second rear sound cavity 6b from hindering the vibration and sound of the speaker 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.

[0105] The above are only exemplary embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A loudspeaker, characterized in that: The invention comprises a shell, a shell cover, and a magnetic circuit system and a vibration system connected to the shell, wherein the magnetic circuit system has a magnetic gap, and the vibration system comprises: A first diaphragm has a first side and a second side in a first direction, the housing has an end corresponding to the first side of the first diaphragm and is open, the outer peripheral side of the first diaphragm is connected to the housing, the housing cover is arranged on the open end of the housing to define a first sound outlet cavity between the first side of the first diaphragm and the housing cover, and the housing cover is provided with a first sound outlet hole connected to the first sound outlet cavity; 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; a middle diaphragm, which is arranged in an annular shape and is located on the second side of the first diaphragm, and the outer peripheral side of the middle diaphragm is connected to the housing; and a second diaphragm, which is arranged in an annular shape and is located on a side of the middle diaphragm away from the first diaphragm, the second diaphragm includes a second folded ring and a second vibration plate, the outer peripheral side of the second folded ring is connected to the outer shell, the second vibration plate includes a main body connected to the inner peripheral side of the second folded ring, and a bent portion connected to the main body and the inner peripheral side of the middle diaphragm, and a second sound outlet cavity is defined between the middle diaphragm and the second diaphragm, a second sound outlet hole is opened on the outer shell, and the second sound outlet hole is connected to the second sound outlet cavity; and, A rigid connecting member is connected between the second diaphragm and the voice coil and is connected to an end of the voice coil away from the first diaphragm.

2. The loudspeaker according to claim 1, characterized in that The first sound outlet hole is directly opposite to and connected to the second sound outlet hole, and the sound waves of the second sound outlet cavity are radiated to the outside through the second sound outlet hole and the first sound outlet hole; or, The second sound outlet hole is formed at a position of the housing corresponding to the first sound outlet cavity so as to connect the first sound outlet cavity with the second sound outlet cavity.

3. The loudspeaker according to claim 1, characterized in that The bending portion includes an inclined section arranged at an angle to the first direction, and the inclined section is connected to the main body.

4. The loudspeaker according to claim 1, characterized in that The middle diaphragm is a flexible member, and includes an outer connecting portion, a bent deformable portion, and an inner connecting portion, wherein the outer connecting portion is connected to the outer shell, the inner connecting portion is connected to the bent portion, and the deformable portion connects the outer connecting portion and the inner connecting portion: The effective vibration area of ​​the middle diaphragm is smaller than the effective vibration area of ​​the second diaphragm; and / or, In the projection along the first direction, the width of the deformation portion of the middle diaphragm is greater than or equal to the width of the deformation portion of the second fold ring; and / or, The first diaphragm includes a first fold ring and a first vibration plate, the outer edge of the first fold ring is connected to the outer shell, the inner edge of the first fold ring is connected to the first vibration plate, and the compliance of the second fold ring and the compliance of the first fold ring are both smaller than the compliance of the middle diaphragm.

5. The loudspeaker according to claim 1, characterized in that The magnetic circuit system comprises: yoke; a central magnet disposed on the yoke; and A peripheral magnet is disposed on the magnetic yoke and is located outside the central magnet, and the magnetic gap is defined between the peripheral magnet and the central magnet; The peripheral magnet is provided with a clearance hole for the rigid connector to pass through, and the magnetic yoke is provided with an escape groove at a position corresponding to the rigid connector, and the escape groove is a through hole penetrating the magnetic yoke.

6. The loudspeaker according to claim 1, characterized in that The deformation portion of the middle diaphragm is protruded toward the second diaphragm, the deformation portion of the second fold ring is protruded toward the first diaphragm, the deformation portion of the middle diaphragm and the deformation portion of the second fold ring are staggered in a second direction, and the second direction is perpendicular to the first direction.

7. The loudspeaker according to claim 1, characterized in that The housing comprises a first shell and a second shell which are arranged opposite to each other in a first direction; The outer peripheral side of the first diaphragm and the outer peripheral side of the diaphragm are both fixed to the first shell, the outer peripheral side of the second fold ring is clamped between the first shell and the second shell, the magnetic circuit system is fixed to the second shell, the second sound outlet hole is opened in the first shell, and the shell cover is arranged on the first shell.

8. The loudspeaker according to claim 7, characterized in that The first housing comprises: A main body section is arranged in a ring shape; and A bending section, located at one end of the main section away from the second shell and extending toward the inner side of the main section, the outer peripheral side of the first diaphragm and the outer peripheral side of the middle diaphragm are fixed to the end of the bending section away from the main section; Wherein, the second sound outlet is arranged in the main body section or the bending section.

9. The loudspeaker according to claim 1, characterized in that The speaker also includes an elastic support member, which includes an external fixing part, an internal fixing part and an elastic arm connecting the external fixing part and the internal fixing part, the external fixing part is connected to the outer shell, and a first electrical connection part is arranged thereon, the internal fixing part is supported and connected to the second vibration plate and the voice coil, and a second electrical connection part electrically connected to the voice coil is arranged on the internal fixing part, and the rigid connecting member is connected to the side of the internal fixing part facing away from the second diaphragm.

10. An electronic device, characterized in that: include: The cavity is provided with a sound outlet of the electronic device; as well as, A speaker, a speaker as described in any one of claims 1 to 9, wherein the first sound outlet cavity 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 middle diaphragm, a second rear sound outlet cavity is defined on the side of the second diaphragm away from the middle diaphragm, the first rear sound outlet cavity and the second rear sound outlet cavity are connected, the speaker is provided with 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, and the effective volume of the cavity is ≥2.5cc.

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