Loudspeaker

Abstract

The utility model relates to a loudspeaker. The loudspeaker comprises a magnet assembly and a vibrating diaphragm assembly, the vibrating diaphragm assembly comprises a first vibrating layer, a second vibrating layer and a driving layer; the driving layer is arranged between the first vibration layer and the second vibration layer and comprises a voice coil; the magnet assembly comprises a first magnet, a second magnet, a third magnet and a fourth magnet; the first magnet is located on one side of the second vibration layer, and the bottom end of the first magnet penetrates through the first vibration layer and part of the voice coil; the second magnet, the third magnet and the fourth magnet are arranged on one side, deviating from the first magnet, of the second vibration layer at intervals; the first magnet and the third magnet are correspondingly arranged along a direction perpendicular to the diaphragm assembly, and the magnetic poles of the first magnet and the third magnet face opposite directions; the second magnet and the fourth magnet are arranged on the two opposite sides of the third magnet in a spaced mode, and the magnetic poles of the second magnet and the fourth magnet are opposite to the magnetic pole of the third magnet in direction. According to the invention, the sensitivity of the loudspeaker can be improved.

Description

Technical Field

[0001] The present application relates to the field of acoustic technology, and more particularly, to a loudspeaker. Background Art

[0002] A loudspeaker, also known as a horn, is a transducer device that converts electrical signals into sound signals. Existing loudspeakers consist of a diaphragm, a coil, and a magnet, with the coil driving the diaphragm's vibrations under the influence of a magnetic field. However, many loudspeakers have simple coil and magnet structures, resulting in low overall sensitivity. Utility Model Content

[0003] The technical problem to be solved by the present application is to provide an improved loudspeaker in view of the above-mentioned defects of the prior art.

[0004] The technical solution adopted by the present application to solve the technical problem is: constructing a loudspeaker, including a magnet assembly and a diaphragm assembly;

[0005] The diaphragm assembly includes a first vibration layer, a second vibration layer, and a drive layer; the drive layer is disposed between the first vibration layer and the second vibration layer and includes a voice coil, which, when energized, drives the first vibration layer and the second vibration layer to move back and forth in the magnetic field constructed by the magnet assembly;

[0006] The magnet assembly includes a first magnet, a second magnet, a third magnet, and a fourth magnet; the first magnet is located on one side of the second vibration layer, and its bottom end is disposed through the first vibration layer and a portion of the voice coil; the second magnet, the third magnet, and the fourth magnet are disposed at intervals on a side of the second vibration layer facing away from the first magnet, and are sequentially spaced apart in a direction parallel to the diaphragm assembly;

[0007] Among them, the first magnet and the third magnet are arranged correspondingly in a direction perpendicular to the diaphragm assembly, and their poles are facing opposite directions; the second magnet and the fourth magnet are arranged at intervals on opposite sides of the third magnet, and their poles are facing opposite directions to the poles of the third magnet.

[0008] In some embodiments, the driving layer further includes a partition plate having a first opening formed thereon, and the voice coil is disposed in the first opening; the voice coil is connected between the first vibration layer and the second vibration layer, and the partition plate is spaced apart from the first vibration layer and the second vibration layer.

[0009] In some embodiments, a gap is formed between the voice coil and the partition plate, and the gap is filled with a low-damping seal.

[0010] In some embodiments, the speaker also includes a shell, and the magnet assembly and the diaphragm assembly are respectively arranged in the shell; the first vibration layer, the second vibration layer and the partition plate divide the chamber in the shell into an upper chamber, a middle chamber, a lower chamber and a bottom chamber in sequence along a direction perpendicular to the diaphragm assembly; the first magnet is located in the upper chamber and the middle chamber; the voice coil is located in the middle chamber and the lower chamber; the second magnet, the third magnet and the fourth magnet are located in the bottom chamber.

[0011] In some embodiments, the housing is formed with a second opening, and the top end of the first magnet is fixed in the second opening.

[0012] In some embodiments, at least one first through hole, at least one second through hole, at least one third through hole and at least one fourth through hole are formed on the shell, respectively. The first through hole connects the upper chamber with the outside world; the second through hole connects the middle chamber with the outside world; the third through hole connects the lower chamber with the outside world; and the fourth through hole connects the bottom chamber with the outside world.

[0013] In some embodiments, the first through hole and the third through hole are formed at the same circumferential position of the shell; the second through hole and the fourth through hole are respectively formed at the remaining circumferential positions of the shell.

[0014] In some embodiments, at least one wire outlet hole is further formed on the housing. The wire outlet hole is formed on a side wall of the housing and is opposite to the first through hole and the third through hole.

[0015] In some embodiments, the second through hole is disposed on the housing opposite to the first through hole and the third through hole.

[0016] In some embodiments, there are two fourth through holes, which are relatively arranged on the housing; the relative positions of the two fourth through holes are perpendicular to the relative positions of the second through hole, the first through hole and the third through hole.

[0017] The implementation of this application has at least the following beneficial effects:

[0018] The present application forms an enhanced magnetic field through the cooperation of the first magnet with the second magnet, the third magnet, and the fourth magnet, generating multiple magnetic lines of force distributed radially along the voice coil, thereby increasing the driving force on the voice coil, and thereby improving the driving effect on the first vibration layer and the second vibration layer, thereby improving the sensitivity of the speaker.

[0019] The present application increases the number of diaphragms by providing a first vibration layer and a second vibration layer. The dual-vibration layer structure can improve the sound pressure level of the speaker. The present application provides a drive layer and sets it between the first vibration layer and the second vibration layer, which can simultaneously drive the vibration of the first vibration layer and the second vibration layer. This arrangement reduces the number of components in the speaker and can reduce the cost of the speaker. At the same time, the layered drive structure also reduces the space occupied by the voice coil, which is conducive to the miniaturization of the speaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present application will be further described below with reference to the accompanying drawings and embodiments, in which:

[0021] Figure 1 is a structural diagram of a loudspeaker in an embodiment of the present application;

[0022] Figure 2 yes Figure 1 A schematic structural diagram of the loudspeaker shown at another angle;

[0023] Figure 3 yes Figure 1 An exploded view of the loudspeaker is shown;

[0024] Figure 4 yes Figure 1 A schematic cross-sectional view of the loudspeaker shown;

[0025] Figure 5 yes Figure 1 The cross-sectional structure diagram of the loudspeaker shown is shown at another angle. DETAILED DESCRIPTION

[0026] In order to provide a clearer understanding of the technical features, objectives, and effects of the present application, the specific embodiments of the present application are now described in detail with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art may make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0027] In the description of this application, it should be understood that the terms "longitudinal", "transverse", "up", "down", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings or the orientation or position relationship in which the product of this application is usually placed when in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting this application.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this application, "plurality" means at least two, such as two or three, unless otherwise specifically defined.

[0029] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0030] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0031] Figures 1 to 5 A loudspeaker in an embodiment of the present application is shown, which may include a magnet assembly 20 and a diaphragm assembly 30. The diaphragm assembly 30 may vibrate in a magnetic field constructed by the diaphragm assembly 30 after being energized to achieve sound production.

[0032] The diaphragm assembly 30 may include a first vibration layer 31, a second vibration layer 32, and a drive layer 33. The drive layer 33 is disposed between the first vibration layer 31 and the second vibration layer 32 and includes a voice coil 331. When connected to a power source, the voice coil 331 can move back and forth in the magnetic field created by the magnet assembly 20, thereby driving the first vibration layer 31 and the second vibration layer 32 to vibrate.

[0033] The magnet assembly 20 includes a first magnet 21, a second magnet 22, a third magnet 23, and a fourth magnet 24. The first magnet 21 is located on one side of the second vibration layer 32, with its bottom end extending through the first vibration layer 31 and a portion of the voice coil 331. The second magnet 22, the third magnet 23, and the fourth magnet 24 are spaced apart on a side of the second vibration layer 32 facing away from the first magnet 21, and are spaced apart in sequence along a direction parallel to the diaphragm assembly 30.

[0034] The first magnet 21 and the third magnet 23 are arranged in a direction perpendicular to the diaphragm assembly 30, with their magnetic poles facing opposite directions. The second magnet 22 and the fourth magnet 24 are arranged on opposite sides of the third magnet 23, with their magnetic poles facing opposite directions.

[0035] exist Figure 5 In the illustrated embodiment, the direction perpendicular to the diaphragm assembly 30 may be understood as the extension direction of the first axis M. The direction parallel to the diaphragm assembly 30 may be understood as the extension direction of the second axis N.

[0036] Then, the magnetic poles of the first magnet 21, the second magnet 22, the third magnet 23, and the fourth magnet 24 are all oriented parallel to the extension direction of the first axis M. The first magnet 21 and the third magnet 23 are spaced apart along the extension direction parallel to the first axis M, and the second magnet 22, the third magnet 23, and the fourth magnet 24 are spaced apart along the extension direction parallel to the second axis N. The magnetic poles of the first magnet 21 and the third magnet 23 are oriented in opposite directions, and the magnetic attraction directions of the second magnet 22 and the fourth magnet 24 are respectively oriented opposite to the magnetic pole direction of the third magnet 23.

[0037] Now define the extension direction along the first axis M. The first magnet 21 is located at the top end side of the diaphragm assembly 30 , and the second magnet 22 , the third magnet 23 and the fourth magnet 24 are located at the bottom end side of the diaphragm assembly 30 .

[0038] Then, in Figure 5 In the illustrated embodiment, the top magnetic pole of the first magnet 21 is an S pole, and the bottom magnetic pole is an N pole. The top magnetic pole of the second magnet 22 is an S pole, and the bottom magnetic pole is an N pole. The top magnetic pole of the third magnet 23 is an N pole, and the bottom magnetic pole is an S pole. The top magnetic pole of the fourth magnet 24 is an S pole, and the bottom magnetic pole is an N pole.

[0039] This arrangement allows magnetic flux lines to form between the third magnet 23 and the second magnet 22, and between the third magnet 23 and the fourth magnet 24 in the magnetic field created by the second, third, and fourth magnets 22, 23, and 24. Because the second, third, and fourth magnets 22, 23, and 24 are spaced apart along the extension direction of the second axis N and are all located on the side of the second vibration layer 32 facing away from the drive layer 33, the two magnetic flux lines created by the three magnets have some magnetic flux lines distributed radially along the voice coil 331. When the voice coil 331 is connected to a power source, the presence of radially distributed magnetic flux lines allows the voice coil 331 to move up and down along the first axis M under the influence of the magnetic flux lines, according to the left-hand rule F = BIL, thereby simultaneously driving the first and second vibration layers 31, 32 to move up and down.

[0040] At the same time, because the bottom end of the first magnet 21 partially penetrates the voice coil 331, the magnetic field generated by the first magnet 21 also has some magnetic lines of force extending radially along the voice coil 331. When energized, the voice coil 331 can move up and down along the first axis M under the influence of the magnetic lines of force generated by the first magnet 21, according to the left-hand rule F=BIL. This simultaneously drives the first and second vibration layers 31 and 32 to move up and down.

[0041] Through the cooperation of the first magnet 21 with the second magnet 22, the third magnet 23 and the fourth magnet 24, an enhanced magnetic field can be formed, generating multiple magnetic lines of force distributed radially along the voice coil 331, thereby increasing the driving force on the voice coil 331, and further increasing the driving effect on the first vibration layer 31 and the second vibration layer 32, thereby improving the sensitivity of the speaker 1.

[0042] The present application increases the number of diaphragms by providing the first vibration layer 31 and the second vibration layer 32. The double vibration layer structure can improve the sound pressure level of the speaker 1.

[0043] The present application provides a driving layer 33 between the first vibration layer 31 and the second vibration layer 32, thereby simultaneously driving the vibrations of the first vibration layer 31 and the second vibration layer 32. This arrangement reduces the number of components within the speaker 1, facilitates miniaturization of the speaker 1, and reduces the cost of the speaker 1.

[0044] This application reduces the space occupied by the voice coil 331 by configuring it with a layered structure and placing it between the first vibration layer 31 and the second vibration layer 32. Because the layered structure is lightweight, the weight of the diaphragm assembly 30 can be reduced, thereby increasing the response rate and achieving a fast response. At the same time, as part of the drive layer 33, the voice coil 331 also increases the drive area, allowing the driving force to be evenly distributed across the surfaces of the first vibration layer 31 and the second vibration layer 32, thereby enhancing the vibration effect of the first vibration layer 31 and the second vibration layer 32.

[0045] It should be understood that the thickness of the voice coil 331 (the dimension in the extension direction of the first axis M) can be flexibly set according to specific circumstances.

[0046] In some embodiments, the driving layer 33 may further include a partition plate 332 for defining the position of the voice coil 331. The partition plate 332 may be generally annular and may have a first opening 3321 formed therein. The voice coil 331 may be disposed within the first opening 3321 and may be movable back and forth within the first opening 3321 along the first axis M.

[0047] like Figure 4 and Figure 5As shown, the voice coil 331 is connected between the first vibration layer 31 and the second vibration layer 32, with its top surface contacting the first vibration layer 31 and its bottom surface contacting the second vibration layer 32, thereby simultaneously driving the vibrations of the first and second vibration layers 31, 32. The surface-to-surface connection between the three layers evenly distributes the driving force to the first and second vibration layers 31, 32, improving vibration performance.

[0048] The partition plate 332 is located between the first vibration layer 31 and the second vibration layer 32 , and is spaced apart from the first vibration layer 31 and the second vibration layer 32 .

[0049] In some embodiments, a gap 333 is formed between the voice coil 331 and the partition plate 332 to prevent the partition plate 332 from restricting the vibration of the voice coil 331. The gap 333 can be filled with a low-damping seal to facilitate connection with the voice coil 331 and facilitate vibration of the voice coil 331.

[0050] like Figures 1 to 3 As shown, the loudspeaker 1 further includes a housing 10 , which defines a cavity therein. The magnet assembly 20 and the diaphragm assembly 30 are respectively disposed in the cavity of the housing 10 .

[0051] exist Figure 3 In the illustrated embodiment, the housing 10 , the first magnet 21 , the second magnet 22 , the third magnet 23 and the fourth magnet 24 are all roughly in the shape of cubes with different proportions.

[0052] In other optional embodiments, the housing 10, and / or the first magnet 21, and / or the second magnet 22, and / or the third magnet 23, and / or the fourth magnet 24 may also be configured in other shapes such as a cylinder, a polygonal column, or a sphere. The second magnet 22 and / or the fourth magnet 24 may also be configured in a ring shape or other shape, and be spaced apart around the circumference of the third magnet 23.

[0053] In some embodiments, the housing 10 can also be formed by assembling a first shell 11 and a second shell 12. The first shell 11 includes a top wall and a first side wall surrounding the top wall, and the second shell 12 includes a bottom wall and a second side wall surrounding the bottom wall. After the first shell 11 and the second shell 12 are assembled, the first side wall and the second side wall are connected to form a cubical housing 10, and the two together define a chamber.

[0054] In some other optional embodiments, one of the first shell 11 and the second shell 12 may not be provided with a side wall, and it can be directly sealed on the side wall of the other one.

[0055] It should be understood that the first shell 11 and the second shell 12 can be assembled by a connecting structure such as a snap-fit ​​structure, or can be integrally formed, which is not specifically limited here.

[0056] In some embodiments, the first vibration layer 31 , the second vibration layer 32 , and the driving layer 33 may separate the chamber inside the housing 10 into an upper chamber 14 , a middle chamber 15 , a lower chamber 16 , and a bottom chamber 17 in sequence along the extension direction of the first axis M.

[0057] The outer ring of the partition plate 332 of the vibration layer 33 is connected to the housing 10 to secure the voice coil 331 within the housing 10. The partition plate 332 also serves to separate the middle chamber 15 from the lower chamber 16. The seal between the voice coil 331 and the partition plate 332 also separates the middle chamber 15 from the lower chamber 16, preventing electrical conduction between the two chambers.

[0058] For example Figure 4 and Figure 5 As shown, the second magnet 22, the third magnet 23, and the fourth magnet 24 are located in the bottom chamber 17. The voice coil 331 is located in the middle chamber 15 and the lower chamber 16. Because the first magnet 21 is disposed within the first vibration layer 31 and a portion of the voice coil 331, the first magnet 21 can be located in the upper chamber 14 and the middle chamber 15. When the first magnet 21 is disposed within the middle chamber 15, some of the magnetic field lines can extend radially along the voice coil 331.

[0059] In some other optional embodiments, the bottom end of the first magnet 21 may also partially extend into the lower chamber 16 , so as to achieve the effect of partially extending the magnetic lines of force along the radial direction of the voice coil 331 .

[0060] like Figure 1 and Figure 2 As shown, in some embodiments, the housing 10 is respectively formed with at least one first through hole 112, at least one second through hole 113, at least one third through hole 121, and at least one fourth through hole 122. Figure 4 and Figure 5 The first through hole 112 can connect the upper chamber 14 with the outside. The second through hole 113 can connect the middle chamber 15 with the outside. The third through hole 121 can connect the lower chamber 16 with the outside. The fourth through hole 122 can connect the bottom chamber 17 with the outside.

[0061] The first and third through holes 112 and 121 can control the low-frequency response of the speaker 1, reduce the sound wave pressure behind the first and second vibration layers 31 and 32, lower the resonant frequency, and thus reduce distortion. The second and fourth through holes 113 and 122 can control the high-frequency response of the speaker 1, balance the pressure on both sides of the first and second vibration layers 31 and 32, increase the freedom of vibration of the first and second vibration layers 31 and 32, and reduce distortion.

[0062] The housing 10 may further define at least one wire outlet hole 123 for leading out a connection wire electrically connected to the voice coil 331 to connect the voice coil 331 to an external power source.

[0063] exist Figure 1 and Figure 2 In the illustrated embodiment, the first through hole 112 and the second through hole 113 are formed on the first housing 11 , and the third through hole 121 , the fourth through hole 122 and the wire outlet hole 123 are formed on the second housing 12 .

[0064] See also Figure 4 and Figure 5 The first through hole 112 and the third through hole 121 are formed at the same circumferential position of the housing 10 , and the second through hole 113 and the fourth through hole 122 are respectively formed at the remaining circumferential positions of the housing 10 .

[0065] By differentiating the locations of the first through hole 112 and the third through hole 121 from the second through hole 113 and the fourth through hole 122 , mutual influence between the through holes can be reduced.

[0066] It should be understood that the “circumferential position of the housing 10 ” can be understood as the circumferential position of the housing 10 with the direction perpendicular to the diaphragm assembly 30 (ie, the extension direction of the first axis M) as the axis.

[0067] In some embodiments, the second through hole 113 is located circumferentially on the housing 10 opposite to the first through hole 112 and the third through hole 121. This arrangement can maximize the distance between the second through hole 113 and the first through hole 112 and the third through hole 121, further reducing their mutual influence.

[0068] The wire outlet hole 123 may also be formed on the side wall of the housing 10 and may also be arranged opposite to the first through hole 112 and the third through hole 121 in the circumferential direction of the housing 10. After the connecting wire is led out of the wire outlet hole 123, it can be sealed to reduce the impact on the sound output of the speaker 1.

[0069] There can be two fourth through holes 122 , which are respectively disposed on the housing 10 . The relative positions of the two fourth through holes 122 can be perpendicular to the relative positions of the second through hole 113 , the first through hole 112 , and the third through hole 121 .

[0070] exist Figure 1 and Figure 2 In the specific embodiment shown, the four sidewalls of the cubical housing 10 are defined as a first sidewall, a second sidewall, a third sidewall, and a fourth sidewall. The first sidewall is disposed opposite the second sidewall, and the third sidewall is disposed opposite the fourth sidewall. The first and second sidewalls are perpendicular to the long axis of the housing 10, while the third and fourth sidewalls are perpendicular to the short axis of the housing 10. Both the long axis and the short axis of the housing 10 are perpendicular to the first axis M.

[0071] In this embodiment, the first through hole 112 and the third through hole 121 are formed on the first side wall, and the line connecting the two extends parallel to the first axis M. The second through hole 113 and the outlet hole 123 are formed on the second side wall. The two fourth through holes 122 are formed on the third side wall and the fourth side wall, respectively, and are located on the third side wall and the fourth side wall respectively near the second side wall. The line connecting the two fourth through holes 122 can be parallel to the second axis N.

[0072] In some other optional embodiments, the line connecting the two fourth through holes 122 may not be perpendicular to the line connecting the first through hole 112 and the third through hole 121. Figure 1 and Figure 2 Taking the illustrated embodiment as an example, the two fourth through holes 122 are respectively disposed on the third side wall and the fourth side wall. When the distances between the two and the second side wall are different, the line connecting the two is not parallel to the second axis N.

[0073] In other optional embodiments, the number of the first through hole 112, and / or the second through hole 113, and / or the third through hole 121 can also be set to two, and the number of the fourth through hole 122 can also be set to one. Alternatively, the number of the four through holes can also be set to three, four, or other numbers. The number of these through holes can be the same or different.

[0074] In some other optional embodiments, the circumferential positions of the fourth through hole 122 and the second through hole 113 on the housing 10 may be interchanged. Alternatively, the fourth through hole 122 and the second through hole 113 may be located on the housing 10 away from the ends of the first through hole 112 and the third through hole 121 on the housing 10.

[0075] In some embodiments, the first magnet 21, the second magnet 22, the third magnet 23, and the fourth magnet 24 can be fixed on the inner wall of the housing 10 by embedding, bonding, etc. Figure 4 and Figure 5 As shown, the first magnet 21 can be disposed on the top wall of the first shell 11 , and the second magnet 22 , the third magnet 23 , and the fourth magnet 24 can be disposed on the bottom wall of the second shell 12 .

[0076] like Figure 3 As shown, in some embodiments, a second opening 111 may be further formed on the housing 10 , and one end of the first magnet 21 is confined within the second opening 111 to achieve positioning of the first magnet 21 on the housing 10 .

[0077] By providing the first and second openings 111, the first magnet 21 can be positioned on the housing 10, facilitating assembly and positioning during production, improving assembly efficiency, and increasing product yield. This prevents magnetic field deviations caused by installation deviations, thereby preventing any impact on the sensitivity of the speaker 1.

[0078] In some other optional embodiments, the second opening 111 may also be configured as a mounting groove, and the positioning effect may also be achieved by embedding the first magnet 21 into the mounting groove.

[0079] In some other optional embodiments, the housing 10 may also be provided with mounting holes or mounting grooves at positions corresponding to the second magnet 22, the third magnet 23 and the fourth magnet 24 to achieve positioning on the housing 10, further improving assembly efficiency and accuracy.

[0080] In this embodiment, the second opening 111 is formed on the first housing 11 and on the top wall of the first housing 11 .

[0081] The side surface of the first magnet 21 exposed outside the housing 10 can be flush with the outer side surface of the housing 10 .

[0082] like Figure 3 As shown, in some embodiments, the first vibration layer 31 may include a first diaphragm 312, an annular first gasket 311, and an annular first bend 313. The first gasket 311 is configured to be fixed within the housing 10, and the first bend 313 is connected between the first diaphragm 312 and the first gasket 311. The second vibration layer 32 may include a second diaphragm 322, an annular second gasket 321, and an annular second bend 323. The second gasket 321 is configured to be fixed within the housing 10, and the second bend 323 is connected between the second diaphragm 322 and the second gasket 321. The voice coil 331 is fixed between the first diaphragm 312 and the second diaphragm 322.

[0083] The cross-section of the first bend 313 and / or the second bend 323 parallel to the first axis M can be arched, concave, or bent, so that the combined area of ​​the first bend 313 (second bend 323) and the first diaphragm 312 (second diaphragm 322) is greater than the area defined by the inner contour of the annular first gasket 311 (second gasket 321). This arrangement can increase the amplitude of the diaphragm assembly 30. As the voice coil 331 drives the first vibration layer 31 and the second vibration layer 32 to vibrate, the deformation of the bend provides the voice coil 331 with a greater travel path length.

[0084] It should be understood that, since the bottom end of the first magnet 21 passes through the first vibration layer 31 and a portion of the voice coil 331 , a third opening 3121 may be formed on the first diaphragm 312 for the first magnet 21 to pass through.

[0085] In some other optional embodiments, when the bottom end of the first magnet 21 also penetrates the second vibration layer 32 , an opening may also be formed on the second diaphragm 322 .

[0086] like Figure 5 As shown, in some embodiments, a plurality of mounting blocks 13 may be provided in the housing 10 , which may be provided at the connection between the partition plate 332 , the first vibration layer 31 , and the second vibration layer 32 and the housing 10 to limit their setting positions on the housing 10 .

[0087] The mounting block 13 may be a structure such as an outwardly convex ear block, or a structure such as an inwardly concave groove, which is not specifically limited here.

[0088] It should be understood that the speaker 1 can be applied to various fields such as earphone speakers, mobile phone receivers, mobile phone speakers, laptop speakers, etc., and is not specifically limited here.

[0089] It can be understood that the above technical features can be used in any combination without limitation.

[0090] The above embodiments only express the specific implementation methods of the present application. The descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the present application. It should be pointed out that, for ordinary technicians in this field, the above technical features can be freely combined without departing from the concept of the present application, and several deformations and improvements can be made, which all fall within the scope of protection of the present application. Therefore, all equivalent transformations and modifications made to the scope of the claims of the present application should fall within the scope of coverage of the claims of the present application.

Claims

1. A loudspeaker, characterized in that: It includes a magnet assembly (20) and a diaphragm assembly (30); The diaphragm assembly (30) includes a first vibration layer (31), a second vibration layer (32), and a driving layer (33); the driving layer (33) is arranged between the first vibration layer (31) and the second vibration layer (32), and includes a voice coil (331); when the voice coil (331) is energized, it drives the first vibration layer (31) and the second vibration layer (32) to move back and forth in the magnetic field constructed by the magnet assembly (20); The magnet assembly (20) includes a first magnet (21), a second magnet (22), a third magnet (23) and a fourth magnet (24); the first magnet (21) is located on one side of the second vibration layer (32), and the bottom end thereof is arranged through the first vibration layer (31) and a portion of the voice coil (331); the second magnet (22), the third magnet (23) and the fourth magnet (24) are arranged at intervals on a side of the second vibration layer (32) away from the first magnet (21), and are arranged in sequence at intervals along a direction parallel to the diaphragm assembly (30); The first magnet (21) and the third magnet (23) are arranged correspondingly in a direction perpendicular to the diaphragm assembly (30), and their magnetic poles are oriented in opposite directions; the second magnet (22) and the fourth magnet (24) are arranged at intervals on opposite sides of the third magnet (23), and their magnetic poles are oriented in opposite directions to those of the third magnet (23).

2. The loudspeaker according to claim 1, wherein The driving layer (33) further includes a partition plate (332), a first opening (3321) is formed on the partition plate (332), and the voice coil (331) is arranged in the first opening (3321); the voice coil (331) is connected between the first vibration layer (31) and the second vibration layer (32), and the partition plate (332) is spaced apart from the first vibration layer (31) and the second vibration layer (32).

3. The loudspeaker according to claim 2, characterized in that A gap (333) is formed between the voice coil (331) and the partition plate (332), and the gap (333) is filled with a low-damping sealing member.

4. The loudspeaker according to claim 2, characterized in that The loudspeaker (1) further comprises a housing (10), wherein the magnet assembly (20) and the diaphragm assembly (30) are respectively arranged in the housing (10); the first vibration layer (31), the second vibration layer (32) and the partition plate (332) divide the chamber in the housing (10) into an upper chamber (14), a middle chamber (15), a lower chamber (16) and a bottom chamber (17) in sequence along a direction perpendicular to the diaphragm assembly (30); the first magnet (21) is located in the upper chamber (14) and the middle chamber (15); the voice coil (331) is located in the middle chamber (15) and the lower chamber (16); the second magnet (22), the third magnet (23) and the fourth magnet (24) are located in the bottom chamber (17).

5. The loudspeaker according to claim 4, characterized in that The housing (10) is formed with a second opening (111), and the top end of the first magnet (21) is fixed in the second opening (111).

6. The loudspeaker according to claim 4, characterized in that At least one first through hole (112), at least one second through hole (113), at least one third through hole (121) and at least one fourth through hole (122) are respectively formed on the shell (10); the first through hole (112) connects the upper chamber (14) with the outside world; the second through hole (113) connects the middle chamber (15) with the outside world; the third through hole (121) connects the lower chamber (16) with the outside world; and the fourth through hole (122) connects the bottom chamber (17) with the outside world.

7. The loudspeaker according to claim 6, characterized in that The first through hole (112) and the third through hole (121) are formed at the same circumferential position of the housing (10); the second through hole (113) and the fourth through hole (122) are respectively formed at the remaining circumferential positions of the housing (10).

8. The loudspeaker according to claim 7, characterized in that At least one wire outlet hole (123) is also formed on the housing (10); the wire outlet hole (123) is formed on a side wall of the housing (10) and is opposite to the first through hole (112) and the third through hole (121).

9. The loudspeaker according to claim 7, characterized in that The second through hole (113) is arranged on the housing (10) opposite to the first through hole (112) and the third through hole (121).

10. The loudspeaker according to claim 9, characterized in that There are two fourth through holes (122) arranged opposite to each other on the housing (10); the relative positions of the two fourth through holes (122) are perpendicular to the relative positions of the second through hole (113), the first through hole (112), and the third through hole (121).

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