Loudspeaker

Abstract

The utility model belongs to the technical field of acoustic-electric conversion, and discloses a loudspeaker which comprises a support, a first vibrating diaphragm assembly, a second vibrating diaphragm assembly and a vibrating assembly, the periphery of the first vibrating diaphragm assembly is fixedly connected to the upper surface of the support, and the periphery of the second vibrating diaphragm assembly is fixedly connected to the lower surface of the support; the vibration assembly is arranged between the first vibrating diaphragm assembly and the second vibrating diaphragm assembly and comprises a first sound production structure and a second sound production structure which are arranged on the support in the same layer, the first sound production structure comprises a first free end and a first fixed end, the first fixed end is connected to one end of the support, and the first sound production structure can drive the first vibrating diaphragm assembly to vibrate in the first direction; the second sound production structure comprises a second free end and a second fixed end, the second fixed end is connected to the other end of the support, and the second sound production structure can drive the second vibrating diaphragm assembly to vibrate in the first direction. The loudspeaker provided by the utility model is small in thickness and lighter and thinner.

Description

TECHNICAL FIELD

[0001] The utility model relates to acoustoelectric conversion technical field especially relates to a loudspeaker. BACKGROUND

[0002] The loudspeaker is as an important electroacoustic equipment, and the application on electronic equipment is very extensive. The loudspeaker can be divided into moving coil loudspeaker, moving iron loudspeaker and loudspeaker according to technical type. The loudspeaker has the advantages such as small, thin, light, no magnetic field interference compared with moving coil loudspeaker.

[0003] In prior art, the loudspeaker includes piezoelectric sheet and diaphragm stacked with piezoelectric sheet, and the piezoelectric sheet vibrates under the drive of drive voltage, drives the diaphragm to vibrate to realize the sound emission of loudspeaker. In order to improve the sound emission effect of loudspeaker, two diaphragms are usually arranged, and the two diaphragms are oppositely arranged in the thickness direction of loudspeaker. In order to realize the drive of each diaphragm, two piezoelectric sheets are usually arranged, and the two piezoelectric sheets are arranged between the two diaphragms and are connected with the two diaphragms one by one. However, since the loudspeaker includes two piezoelectric sheets, the loudspeaker in prior art is thick, and a large installation space is required when installed in electronic equipment. SUMMARY

[0004] The first purpose of the utility model is to provide a loudspeaker to solve the problem of large thickness of loudspeaker and large installation space required in prior art.

[0005] According to the above idea, the technical scheme adopted by the utility model is:

[0006] The loudspeaker comprises:

[0007] The support has upper surface and lower surface oppositely arranged in the first direction;

[0008] The first diaphragm assembly is fixedly connected at the periphery to the upper surface of the support;

[0009] The second diaphragm assembly is fixedly connected at the periphery to the lower surface of the support;

[0010] A vibration assembly is arranged between the first diaphragm assembly and the second diaphragm assembly, and comprises first and second sound radiating structures arranged in the same layer on the support. The first sound radiating structure comprises a first free end and a first fixed end, the first fixed end is connected to one end of the support, and the first free end is fixedly connected to the first diaphragm assembly. The first sound radiating structure can drive the first diaphragm assembly to vibrate in the first direction. The second sound radiating structure comprises a second free end and a second fixed end, the second fixed end is connected to the other end of the support, and the second free end is fixedly connected to the second diaphragm assembly. The second sound radiating structure can drive the second diaphragm assembly to vibrate in the first direction.

[0011] Optionally, the vibration assembly further comprises a first connecting member connected between the first free end and the first diaphragm assembly.

[0012] and / or,

[0013] The vibration assembly further comprises a second connecting member connected between the second free end and the second diaphragm assembly.

[0014] Optionally, the first sound radiating structure is provided in a plurality, and the vibration assembly further comprises a first connecting member connected to the first diaphragm assembly. The first connecting member is provided in one, and the first free ends of the plurality of first sound radiating structures are all connected to the first connecting member to be connected to the first diaphragm assembly through the first connecting member. Alternatively, the first connecting member is provided in a plurality, and each first connecting member is connected to the first free end of at least one first sound radiating structure.

[0015] Optionally, the second sound radiating structure is provided in a plurality, and the vibration assembly further comprises a second connecting member connected to the second diaphragm assembly. The second connecting member is provided in one, and the second free ends of the plurality of second sound radiating structures are all connected to the second connecting member to be connected to the second diaphragm assembly through the second connecting member. Alternatively, the second connecting member is provided in a plurality, and each second connecting member is connected to the second free end of at least one second sound radiating structure.

[0016] Optionally, the first free end of the first sound radiating structure and the first fixed end are oppositely arranged in a second direction; and the second free end of the second sound radiating structure and the second fixed end are oppositely arranged in the second direction.

[0017] Optionally, the first sound radiating structure and the second sound radiating structure are at least partially overlapped in a third direction in orthographic projection; and the third direction is perpendicular to the first direction and the second direction.

[0018] Optionally, the first sound generating structure and the second sound generating structure are each provided in plurality, and the plurality of first sound generating structures and the plurality of second sound generating structures are arranged alternately in the third direction.

[0019] Optionally, the vibration assembly further comprises a first connecting member, two first free ends adjacent in the third direction are connected to the same first connecting member, the first connecting member is arranged across the second sound generating structure between the two first free ends, and a portion of the first connecting member opposite to the second sound generating structure is convex in a direction away from the second sound generating structure.

[0020] Optionally, the first sound generating structure and the second sound generating structure are each provided in plurality, and there are a plurality of second sound generating structures between two first sound generating structures arranged at intervals in the third direction.

[0021] The vibration assembly further comprises a second connecting member, and the plurality of second sound generating structures between the two first sound generating structures are connected to the same second connecting member, and the second connecting member is connected to the second diaphragm assembly.

[0022] Optionally, the vibration assembly further comprises a first connecting member, two first free ends adjacent in the third direction are connected to the same first connecting member, the first connecting member is arranged across the second sound generating structure between the two first free ends, and a portion of the first connecting member opposite to the second sound generating structure is convex in a direction away from the second sound generating structure.

[0023] Optionally, the width of the first sound generating structure gradually decreases in a direction from the first fixed end to the first free end; and / or, the width of the second sound generating structure gradually decreases in a direction from the second fixed end to the second free end.

[0024] Optionally, the vibration direction of the first diaphragm assembly is opposite to the vibration direction of the second diaphragm assembly.

[0025] The utility model discloses beneficial effect:

[0026] The utility model provides a loudspeaker, first diaphragm assembly and second diaphragm assembly are opposite to arrange in the first direction, and vibration assembly includes first sound generating structure and second sound generating structure, and the first sound generating structure for driving first diaphragm assembly vibration and the second sound generating structure for driving second diaphragm assembly vibration are arranged in the same layer, that is, first sound generating structure and second sound generating structure are in the same plane, on the basis of guaranteeing driving effect, can reduce the space of vibration assembly in the first direction, and then make the size of loudspeaker in the first direction can be smaller, thereby making loudspeaker can be lighter and thinner. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the contents of the embodiments of the present application and the drawings.

[0028] Figure 1 is a structural schematic diagram of a loudspeaker provided by the first embodiment of the present application;

[0029] Figure 2 is a partial schematic diagram of a loudspeaker provided by the first embodiment of the present application;

[0030] Figure 3 is a first exploded view of a loudspeaker provided by the first embodiment of the present application;

[0031] Figure 4 is an exploded view of a first sound producing structure provided by the first embodiment of the present application;

[0032] Figure 5 is a top view of a loudspeaker without showing a first diaphragm assembly provided by the first embodiment of the present application;

[0033] Figure 6 is a second exploded view of a loudspeaker provided by the first embodiment of the present application;

[0034] Figure 7 is a first sectional view of a loudspeaker provided by the first embodiment of the present application;

[0035] Figure 8 is a second sectional view of a loudspeaker provided by the first embodiment of the present application;

[0036] Figure 9 is a third exploded view of a loudspeaker provided by the second embodiment of the present application;

[0037] Figure 10 is a top view of a partial loudspeaker provided by the second embodiment of the present application.

[0038] In the drawings:

[0039] 100, support; 110, upper surface; 120, lower surface; 130, cavity; 140, upper frame; 150, lower frame;

[0040] 200, first diaphragm assembly; 210, first diaphragm; 220, first dome;

[0041] 300, second diaphragm assembly; 310, second diaphragm; 320, second dome;

[0042] 400, vibration assembly; 410, first sound generating structure; 411, first fixed end; 412, first free end; 413, first base plate; 414, first piezoelectric piece; 420, second sound generating structure; 421, second fixed end; 422, second free end; 423, second base plate; 424, second piezoelectric piece; 430, first connecting piece; 431, cross beam; 432, transition part; 433, connecting part; 440, second connecting piece;

[0043] 500, circuit assembly;

[0044] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0045] In order to make the technical problems solved by the utility model, the technical scheme adopted and the technical effects reached more clear, the technical scheme of the utility model will be further explained below by combining with the drawings and through specific embodiments. It can be understood that the specific embodiments described here are only used to explain the utility model, but not limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the parts related to the utility model are shown in the drawings, not all.

[0046] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0047] In the description of the utility model, unless otherwise explicitly defined and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the communication inside two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0048] In the utility model, unless another definite provision and limitation, first feature is "on" or "under" second feature, can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through other feature between them. Moreover, first feature "on", "above" and "upper surface of" second feature includes that first feature is directly above and obliquely above second feature, or only indicates that the horizontal height of first feature is higher than second feature. First feature "under", "below" and "under surface of" second feature includes that first feature is directly below and obliquely below second feature, or only indicates that the horizontal height of first feature is less than second feature. In the description of the embodiment, if not specially stated, "a plurality of" specifically refers to two or more than two.

[0049] In the description of the embodiment, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and other orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, only for the convenience of description and simplification of operation, and not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0050] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on another element or there can be a middle element.

[0051] The technical scheme of the utility model will be further illustrated below by combining the drawings and through specific embodiments.

[0052] Embodiment one

[0053] The embodiment provides a loudspeaker, which can be relatively thin in thickness and can be applied to electronic equipment with high space requirements.

[0054] The loudspeaker in the embodiment can be a MEMS (micro-electro-mechanical system) loudspeaker, and the MEMS loudspeaker can be widely applied to current mobile electronic equipment due to low power consumption and light weight.

[0055] It should be noted that the electronic device may include mobile phones, tablet computers, laptops, personal digital assistants (PDAs), cameras, personal computers, in-vehicle devices, wearable devices, augmented reality (AR) glasses, AR headsets, virtual reality (VR) glasses, VR headsets, landline handsets (pickups), medical assistive devices (such as hearing aids), and various headphones (such as wireless or wired headphones) with speakers. This application does not impose any special limitations on the specific form of the aforementioned electronic device.

[0056] Before introducing this embodiment, for the convenience of the following description, a three-dimensional coordinate system can be established in some of the accompanying drawings. Figure 1 The speaker shown is rectangular, for example. Figure 2 As shown, the first direction X is the thickness direction of the speaker, the second direction Y is the length direction of the speaker, and the third direction Z is the width direction of the speaker. That is, any two of the first direction X, the second direction Y, and the third direction Z are perpendicular to each other. It can be understood that the width direction of the speaker is smaller than the length direction of the speaker.

[0057] For example, such as Figures 1 to 3 As shown, the loudspeaker includes a bracket 100, a first diaphragm assembly 200, a second diaphragm assembly 300, and a vibrating assembly 400.

[0058] For example, the support 100 is made of a rigid material, such as metal or plastic, but this embodiment is not limited to this. The support 100 is a frame structure, such as... Figure 7 As shown, the bracket 100 has an upper surface 110 and a lower surface 120 disposed opposite each other in a first direction X. The bracket 100 forms a cavity 130 through the upper surface 110 and the lower surface 120 to provide space for the vibration of the vibration assembly 400, the first diaphragm assembly 200 and the second diaphragm assembly 300.

[0059] Optionally, the bracket 100 can be a standalone component, or the bracket 100 can be an assembly, for example, as... Figure 2 As shown, the bracket 100 includes an upper frame 140 and a lower frame 150 that are connected to each other, and the upper frame 140 and the lower frame 150 are arranged in the first direction X.

[0060] The first diaphragm assembly 200 in the embodiment is fixedly arranged on the support 100. Specifically, the periphery of the first diaphragm assembly 200 is fixedly connected to the upper surface 110 of the support 100. Optionally, the first diaphragm assembly 200 can cover the cavity 130 of the support 100. The vibration assembly 400 can drive the middle part of the first diaphragm assembly 200 to vibrate, so as to realize sound emission. For example, the periphery of the first diaphragm assembly 200 is fixedly connected to the upper frame 140. Further, the periphery of the first diaphragm assembly 200 is fixedly connected to the surface of the upper frame 140 which is away from the lower frame 150.

[0061] The specific structure of the first diaphragm assembly 200 can refer to the prior art. In some optional embodiments, as shown in Figure 7 and Figure 8 , the first diaphragm assembly 200 comprises a first diaphragm 210 and a first dome 220. The periphery of the first diaphragm 210 is fixedly connected to the support 100, the first dome 220 is connected to the surface of the first diaphragm 210 which is towards the cavity 130, and the vibration assembly 400 is connected to the first dome 220, so as to drive the first diaphragm 210 to vibrate through the first dome 220, thereby emitting sound.

[0062] The second diaphragm assembly 300 in the embodiment is fixedly arranged on the lower surface 120 of the support 100. Optionally, the second diaphragm assembly 300 is arranged opposite to the first diaphragm assembly 200 in the first direction X, so as to form a loudspeaker with double diaphragm assemblies. Specifically, the periphery of the second diaphragm assembly 300 is fixedly connected to the lower surface of the support 100, and covers the cavity 130 of the support 100. The vibration assembly 400 can drive the middle part of the second diaphragm assembly 300 to vibrate, so as to realize sound emission. For example, the periphery of the second diaphragm assembly 300 is fixedly connected to the lower frame 150. Further, the periphery of the second diaphragm assembly 300 is fixedly connected to the surface of the lower frame 150 which is away from the upper frame 140.

[0063] The specific structure of the second diaphragm assembly 300 can refer to the prior art. In some optional embodiments, please continue to refer to Figure 7 and Figure 8 , the second diaphragm assembly 300 comprises a second diaphragm 310 and a second dome 320. The periphery of the second diaphragm 310 is fixedly connected to the support 100, the second dome 320 is connected to the surface of the second diaphragm 310 which is towards the cavity 130, and the vibration assembly 400 is connected to the second dome 320, so as to drive the second diaphragm 310 to vibrate through the second dome 320, thereby emitting sound.

[0064] For example, as shown in Figure 2As shown, the vibration assembly 400 in the embodiment is arranged between the first diaphragm assembly 200 and the second diaphragm assembly 300. Moreover, the vibration assembly 400 includes the first sound generating structure 410 and the second sound generating structure 420 arranged in the same layer of the support 100. The first sound generating structure 410 is connected to the first diaphragm assembly 200 and used to drive the first diaphragm assembly 200 to vibrate, and the second sound generating structure 420 is connected to the second diaphragm assembly 300 and used to drive the second diaphragm assembly 300 to vibrate, so that the two sound generating structures for driving the two diaphragm assemblies are located in the same layer, thereby reducing the thickness of the vibration assembly 400, reducing the thickness of the loudspeaker, so that the loudspeaker occupies the minimum space in the thickness direction, and the loudspeaker can be thinner, thereby making the electronic device applying the loudspeaker more lightweight. It should be noted that there is a gap between the first sound generating structure 410 and the second sound generating structure 420, that is, the first sound generating structure 410 and the second sound generating structure 420 are not in contact, so that they will not interfere with each other, ensuring the normal use of the loudspeaker and preventing the generation of noise.

[0065] The first sound generating structure 410 includes a first free end 412 and a first fixed end 411. The first fixed end 411 is connected to one end of the support 100, and the first free end 412 is fixed to the first diaphragm assembly 200 and used to drive the first diaphragm assembly 200 to vibrate in the first direction X. In the embodiment, the first free end 412 is arranged on the side of the first diaphragm assembly 200 facing the second diaphragm assembly 300.

[0066] In the embodiment, one end of the first sound generating structure 410 is fixedly connected to the support 100, and the other end is suspended in the cavity 130 to form a cantilever beam structure. After being energized, the first sound generating structure 410 in the cantilever beam structure will deform in the first direction X, so that the first free end 412 vibrates, thereby driving the first diaphragm assembly 200 to vibrate, and the first diaphragm assembly 200 pushes the air to sound.

[0067] The specific structure of the second sound generating structure 420 is similar to that of the first sound generating structure 410. The second sound generating structure 420 includes a second free end 422 and a second fixed end 421. The second fixed end 421 is connected to the other end of the support 100. The second free end 422 is fixedly connected to the second diaphragm assembly 300 and used to drive the second diaphragm assembly 300 to vibrate in the first direction X.

[0068] In the embodiment, one end of the second sound generating structure 420 is fixedly connected to the support 100, and the other end is suspended in the cavity 130 to form a cantilever beam structure. After being energized, the second sound generating structure 420 in the cantilever beam structure will deform in the first direction X, so that the second free end 422 vibrates, thereby driving the second diaphragm assembly 300 to vibrate, and the second diaphragm assembly 300 pushes the air to sound.

[0069] The loudspeaker provided by the embodiment has the first diaphragm assembly 200 and the second diaphragm assembly 300 arranged opposite to each other in the first direction X, and the vibration assembly 400 includes the first sound emitting structure 410 and the second sound emitting structure 420. The first sound emitting structure 410 for driving the first diaphragm assembly 200 to vibrate and the second sound emitting structure 420 for driving the second diaphragm assembly 300 to vibrate are arranged in the same layer, that is, the first sound emitting structure 410 and the second sound emitting structure 420 are in the same plane. On the basis of ensuring the driving effect, the space occupied by the vibration assembly 400 in the first direction X can be reduced, and thus the size of the loudspeaker in the first direction X can be smaller, so that the loudspeaker can be thinner.

[0070] In some optional embodiments, the first free end 412 and the first fixed end 411 are arranged opposite to each other in the second direction Y, so that the first free end 412 can be connected to the region close to the center of the first diaphragm assembly 200, thereby improving the driving effect on the first diaphragm assembly 200. The second free end 422 and the second fixed end 421 are arranged opposite to each other in the second direction Y, so that the second free end 422 can be connected to the region close to the center of the second diaphragm assembly 300, thereby improving the driving effect on the second diaphragm assembly 300.

[0071] For example, as shown in Figure 3 or Figure 5 The loudspeaker further includes the circuit assembly 500 arranged in the support 100 and electrically connected to the vibration assembly 400, thereby providing an audio signal to the vibration assembly 400. For example, the circuit assembly 500 can be clamped and fixed between the upper frame 140 and the lower frame 150. The circuit assembly 500 can include one or more circuit boards (not shown in the figure), which are not limited in the embodiment. The circuit board is provided with a soldering pad (not shown in the figure), and the vibration assembly 400 can be soldered on the soldering pad to realize the electrical connection between the circuit board and the vibration assembly 400.

[0072] In some optional embodiments, as shown in Figure 4 The first sound emitting structure 410 includes the first substrate 413 and the first piezoelectric sheet 414 arranged on at least one side of the first substrate 413 in the first direction X. In the embodiment, the first substrate 413 is provided with the first piezoelectric sheet 414 on both sides in the first direction X. The material of the first substrate 413 can be plastic or metal, and the material of the first piezoelectric sheet 414 can be piezoelectric ceramic. After the first piezoelectric sheet 414 is electrified, it will deform upward or downward in the first direction X according to the polarity of the electricity, thereby driving the first substrate 413 to move in the first direction X.

[0073] In some optional embodiments, the first substrate 413 of the first fixed end 411 is connected to one end of the bracket 100, and the first piezoelectric element 414 of the first fixed end 411 is electrically connected to the circuit assembly 500, so that the circuit assembly 500 inputs an acoustic signal to the first piezoelectric element 414. The first substrate 413 of the first free end 412 is fixedly connected to the first diaphragm assembly 200. After the first piezoelectric element 414 is energized, the first sound-generating structure 410, which has a cantilever beam structure, will deform in the first direction X, causing the first substrate 413 of the first free end 412 to vibrate, thereby driving the first diaphragm assembly 200 to vibrate, so that the first diaphragm assembly 200 pushes the air to produce sound.

[0074] Optionally, such as Figure 6 As shown, the second sound-generating structure 420 includes a second substrate 423 and a second piezoelectric sheet 424 disposed on at least one side of the second substrate 423 in the first direction X. In this embodiment, the second substrate 423 has second piezoelectric sheets 424 connected to both sides in the first direction X. The material of the second substrate 423 can be plastic or metal, and the material of the second piezoelectric sheet 424 can be piezoelectric ceramic. After being energized, the second piezoelectric sheet 424 will deform upward or downward in the first direction X according to the polarity of the electrode, thereby driving the second substrate 423 to move in the first direction X. The second piezoelectric sheet 424 at the second fixed end 421 is electrically connected to the circuit assembly 500, so that the circuit assembly 500 inputs an acoustic signal to the first piezoelectric sheet 414. The second free end 422 is disposed on the side of the second diaphragm assembly 300 facing the first diaphragm assembly 200, and the second substrate 423 of the second free end 422 is fixedly connected to the second diaphragm assembly 300.

[0075] When a loudspeaker includes a first diaphragm assembly 200 and a second diaphragm assembly 300, if the vibration directions of the first diaphragm assembly 200 and the second diaphragm assembly 300 are the same, it will result in a large overall vibration amplitude of the loudspeaker. In some optional embodiments, at the same time, the vibration direction of the first diaphragm assembly 200 is opposite to that of the second diaphragm assembly 300. That is, at the same time, the first vibrating assembly 400 and the second diaphragm assembly 300 move towards each other or away from each other, so that their movement directions are opposite, thereby playing a role in damping vibration, reducing the overall vibration amplitude of the loudspeaker, thereby reducing the impact of the loudspeaker on other components in the electronic device, and also ensuring the reliability of the electrical connection between the first piezoelectric sheet 414 and the second piezoelectric sheet 424 and the circuit assembly 500.

[0076] It is understood that the vibration direction of the first diaphragm assembly 200 is the same as that of the first sound-generating structure 410, and the vibration direction of the second diaphragm assembly 300 is the same as that of the second sound-generating structure 420. For example, the circuit assembly 500 can input acoustic-electric signals of equal magnitude and opposite polarity to the first piezoelectric element 414 of the first sound-generating structure 410 and the second piezoelectric element 424 of the second sound-generating structure 420, so that the deformation amplitude of the first piezoelectric element 414 and the second piezoelectric element 424 is the same, but the deformation direction is opposite, thereby realizing that the vibration directions of the first sound-generating structure 410 and the second sound-generating structure 420 are opposite.

[0077] Since the first sound-generating structure 410 usually extends along the second direction Y when it is not vibrating, and the first sound-generating structure 410 and the first diaphragm assembly 200 have a certain distance in the first direction X, if the first sound-generating structure 410 is directly connected to the first diaphragm assembly 200, the first sound-generating structure 410 will be in a bent state toward the first diaphragm assembly 200, and will pull on the first diaphragm assembly 200, which can easily cause damage to the first diaphragm assembly 200.

[0078] Therefore, such as Figure 3 As shown, the vibration component 400 in this embodiment also includes a first connector 430. The first connector 430 is connected between the first sound-generating structure 410 and the first diaphragm assembly 200. For example, the first free end 412 of the first sound-generating structure 410 is connected to the first connector 430. By setting the first connector 430, when the first sound-generating structure 410 is not vibrating, it can be ensured that the first sound-generating structure 410 maintains its extension along the second direction Y, and the first diaphragm assembly 200 will not be pulled, reducing the probability of damage to the first diaphragm assembly 200; furthermore, by setting the first connector 430, the distance between the first sound-generating structure 410 and the first diaphragm assembly 200 can be kept constant, facilitating the control of the vibration of the first diaphragm assembly 200; in addition, when the connection area of ​​the first free end 412 is small, by setting the first connector 430, the connection area between the first connector 430 and the first diaphragm assembly 200 can be increased, improving the connection stability and reliability.

[0079] Similarly, in order to reduce the probability of damage to the first diaphragm assembly 200, such as Figure 3As shown, the vibration assembly 400 further comprises a second connecting member 440 connected between the second sound generating structure 420 and the second diaphragm assembly 300. For example, the second free end 422 of the second sound generating structure 420 is connected to the second connecting member 440. By arranging the second connecting member 440, when the second sound generating structure 420 is not vibrating, the second sound generating structure 420 can be ensured to keep extending along the second direction Y without pulling the second diaphragm assembly 300, thereby reducing the probability of damage of the second diaphragm assembly 300. In addition, by arranging the second connecting member 440, the distance between the second sound generating structure 420 and the second diaphragm assembly 300 can be ensured to be a certain value, thereby facilitating the control of vibration of the second diaphragm assembly 300. In addition, when the connection area of the second free end 422 is small, by arranging the second connecting member 440, the connection area between the second connecting member 440 and the second diaphragm assembly 300 can be increased, thereby improving the connection stability and reliability.

[0080] The number of the first sound generating structures 410 can be selected according to actual needs. The first sound generating structure 410 can be provided with one or more. When the first sound generating structure 410 is provided with one, the first connecting member 430 is provided with one. When the first sound generating structure 410 is provided with multiple, the number of the first connecting members 430 can be various.

[0081] In some optional embodiments, when the first sound generating structure 410 is provided with multiple, the first connecting member 430 is provided with one, and all the first sound generating structures 410 are connected to the one first connecting member 430 to be connected to the first diaphragm assembly 200 through the first connecting member 430. In this way, the number of the first connecting members 430 can be reduced, and the consistency of movement of the first diaphragm assembly 200 can be ensured, thereby reducing the number of components of the loudspeaker and facilitating assembly.

[0082] In some optional embodiments, when the first sound generating structure 410 is provided with multiple, the first connecting member 430 is provided with multiple, and each first connecting member 430 is connected to at least one first sound generating structure 410. For example, the multiple first connecting members 430 correspond to the multiple first sound generating structures 410 one by one, and each first sound generating structure 410 is connected to the corresponding first connecting member 430, so that each first sound generating structure 410 can be connected to the first diaphragm assembly 200 through the first connecting member 430. Alternatively, the first connecting member 430 is provided with multiple, and each first connecting member 430 is connected to at least two first sound generating structures 410, that is, at least two first sound generating structures 410 share one first connecting member 430, thereby reducing the number of the first connecting members 430.

[0083] Similarly, the number of the second sound generating structures 420 can be selected according to actual needs. The second sound generating structures 420 can be provided with one or more. When the second sound generating structures 420 are provided with one, the second connecting member 440 is provided with one. When the second sound generating structures 420 are provided with more, the number of the second connecting members 440 can be various.

[0084] In some optional embodiments, when the second sound generating structures 420 are provided with more, the second connecting member 440 is provided with one, and all the second sound generating structures 420 are connected to the one second connecting member 440 to be connected to the second diaphragm assembly 300 through the second connecting member 440. In this way, the number of the second connecting members 440 can be reduced, and the consistency of the movement of the second diaphragm assembly 300 can be ensured, thereby reducing the number of components of the loudspeaker and facilitating assembly.

[0085] In some optional embodiments, when the second sound generating structures 420 are provided with more, the second connecting member 440 is provided with one, and all the second sound generating structures 420 are connected to the one second connecting member 440 to be connected to the second diaphragm assembly 300 through the second connecting member 440. In this way, the number of the second connecting members 440 can be reduced, and the consistency of the movement of the second diaphragm assembly 300 can be ensured, thereby reducing the number of components of the loudspeaker and facilitating assembly.

[0086] In order to improve the low frequency sensitivity of the loudspeaker, for example, as shown in Figure 5As shown, the orthographic projections of the first sound generating structure 410 and the second sound generating structure 420 in the third direction Z at least partially coincide, that is, the orthographic projections of the first sound generating structure 410 and the second sound generating structure 420 in the third direction Z have a coinciding part, that is, the first sound generating structure 410 and the second sound generating structure 420 can be staggered with each other, so that the lengths of the first sound generating structure 410 and the second sound generating structure 420 can be longer, so as to increase the areas of the first sound generating structure 410 and the second sound generating structure 420, further improving the sensitivity of the loudspeaker. Moreover, the lengths of the first sound generating structure 410 and the second sound generating structure 420 are longer, so that the force exerted by the first sound generating structure 410 on the first diaphragm assembly 200 can be closer to being perpendicular to the first diaphragm assembly 200, and the force exerted by the second sound generating structure 420 on the second diaphragm assembly 300 is closer to being perpendicular to the second diaphragm assembly 300, improving the driving effect on the first diaphragm assembly 200 and the second diaphragm assembly 300. In addition, the lengths of the first sound generating structure 410 and the second sound generating structure 420 are longer, which also reduces the resonance frequency, thereby increasing the low-frequency sensitivity of the loudspeaker.

[0087] In some optional embodiments, when the first sound generating structure 410 and the second sound generating structure 420 are both provided with a plurality of sound generating structures, the first free ends 412 of the plurality of first sound generating structures 410 and the second free ends 422 of the plurality of second sound generating structures 420 are alternately arranged in the third direction Z, so that the first sound generating structure 410 does not affect the extension of the second sound generating structure 420 in the second direction Y, and the second sound generating structure 420 does not affect the extension of the first sound generating structure 410 in the second direction Y, so that the lengths of the first sound generating structure 410 and the second sound generating structure 420 in the first direction X can be longer, thereby reducing the resonance frequency and improving the low-frequency sensitivity; and the alternately arranged first sound generating structure 410 and second sound generating structure 420 can also improve the uniformity of the distribution of the connection positions of the first sound generating structure 410 and the first diaphragm assembly 200 in the third direction Z, and improve the uniformity of the distribution of the connection positions of the second sound generating structure 420 and the second diaphragm assembly 300 in the third direction Z, reducing the probability of damage to the first diaphragm assembly 200 and the second diaphragm assembly 300 due to excessive local stress, and improving the stability of the driving of the first diaphragm assembly 200 and the second diaphragm assembly 300.

[0088] Optionally, the area of the coinciding part of the orthographic projections of the first sound generating structure 410 and the second sound generating structure 420 in the third direction Z is smaller than the area of the orthographic projection of the first sound generating structure 410 in the third direction Z, and smaller than the area of the orthographic projection of the second sound generating structure 420 in the third direction Z.

[0089] In the present embodiment, as shown in Figure 5 and Figure 6As shown, the first sound generating structures 410 are arranged in the third direction Z, and the second sound generating structure 420 is arranged at least one. Two first sound generating structures 410 adjacent in the third direction Z and one or more second sound generating structures 420 form a piezoelectric group (not shown in the figure). The vibration assembly 400 includes at least one piezoelectric group, and when the vibration assembly 400 includes multiple piezoelectric groups, the multiple piezoelectric groups are arranged in the third direction Z. In a piezoelectric group, the second free end 422 of the one or more second sound generating structures 420 is located between the two first sound generating structures 410 in the third direction Z, so as to make full use of the space of the loudspeaker in the third direction Z. It should be noted that when the piezoelectric group is provided with multiple piezoelectric groups, two piezoelectric groups adjacent in the third direction Z can be independent of each other, that is, the first sound generating structure 410 in one piezoelectric group cannot be reused in another piezoelectric group. Alternatively, two piezoelectric groups adjacent in the third direction Z can also share a first sound generating structure 410, that is, the first sound generating structure 410 in one piezoelectric group can also serve as the first sound generating structure 410 in another piezoelectric group, which is not limited in the embodiment.

[0090] In the embodiment, as shown in Figure 5 and Figure 6 , the first sound generating structure 410 is provided with two, and the second sound generating structure 420 is provided with one. The second free end 422 of the second sound generating structure 420 is located between the two first sound generating structures 410 in the third direction Z. In this way, the number of the first sound generating structure 410 and the second sound generating structure 420 will not be too much, and on the basis of realizing the driving of the two diaphragm assemblies, the number of components of the loudspeaker is reduced.

[0091] Further, please continue to refer to Figure 5 and Figure 6 , when each piezoelectric group includes one second sound generating structure 420, in a piezoelectric group, the two first sound generating structures 410 are connected to the same first connecting piece 430, and the first connecting piece 430 is arranged across the one or more second sound generating structures 420 in the piezoelectric group, and the part of the first connecting piece 430 opposite to the one second sound generating structure 420 is protruded in the direction away from the one second sound generating structure 420 and connected to the first diaphragm assembly 200, so as to realize the connection of the two first sound generating structures 410 and the first diaphragm assembly 200. By protruding the part of the first connecting piece 430 opposite to the one second sound generating structure 420 in the direction away from the one second sound generating structure 420, on the one hand, it is convenient to connect with the first diaphragm assembly 200, and on the other hand, it can also reserve the vibration space of the one second sound generating structure 420, so that the first connecting piece 430 does not interfere with the vibration of the second sound generating structure 420, and the second sound generating structure 420 does not collide with the first connecting piece 430 when vibrating, preventing the loudspeaker from producing noise and ensuring the accuracy of the driving of the second diaphragm assembly 300 by the second sound generating structure 420.

[0092] The structure of the first connector 430 can be varied, for example, such as Figure 6 or Figure 8 As shown, the first connector 430 includes a crossbeam 431, two transition portions 432, and two connecting portions 433. The crossbeam 431 has a length direction of Z (third direction Z). The two transition portions 432 are connected to the two ends of the crossbeam 431 along its length. Each connecting portion 433 is connected to one end of a transition portion 432 away from the crossbeam 431, forming a U-shaped first connector 430. The two connecting portions 433 are connected to the two first free ends 412 of the corresponding piezoelectric units. This allows the first connector 430 to better support the first diaphragm assembly 200 and the two first sound-generating structures 410, and the first connector 430 to have high structural strength, reducing the probability of deformation. It should be noted that the larger surface of the crossbeam 431 (i.e., the surface with the larger area of ​​the crossbeam 431) is connected to the first diaphragm assembly 200 to increase the connection area and ensure connection strength. Similarly, the larger surface of the connecting part 433 (i.e. the surface of the connecting part 433 with a larger area) is connected to the first sound-generating structure 410 to improve the connection strength between the connecting part 433 and the first sound-generating structure 410 and reduce the probability of connection failure.

[0093] Further optional, such as Figure 8 As shown, the angle between the transition portion 432 and the crossbeam 431 is α, and the angle between the transition portion 432 and the connecting portion 433 is β, where both α and β are greater than 90 degrees. Thus, on the one hand, the first connecting member 430 has a certain elasticity in the first direction X, thereby buffering the force transmitted from the first sound-generating structure 410 to the first diaphragm assembly 200 and reducing the probability of damage to the first diaphragm assembly 200; on the other hand, the distance between the ends of the connecting portions 433 connecting the two transition portions 432 is relatively large, thereby satisfying the requirement that the transition portions 432 do not interfere with the second sound-generating structure 420.

[0094] like Figure 2 As shown, the second connector 440 in this embodiment can be a block structure, and this embodiment does not limit it.

[0095] In order to make the areas of both the first sound-generating structure 410 and the second sound-generating structure 420 relatively large, in this embodiment, such as Figure 5As shown, the width of the first sound generating structure 410 gradually decreases in the direction from the first fixed end 411 to the first free end 412; the width of the second sound generating structure 420 gradually decreases in the direction from the second fixed end 421 to the second free end 422. In some alternative embodiments, the first sound generating structure 410 and the second sound generating structure 420 have the same shape, and the number of the first sound generating structure 410 is the same as the number of the second sound generating structure 420, so as to ensure the consistency of the driving of the first diaphragm assembly 200 and the second diaphragm assembly 300. Preferably, the number of the first sound generating structure 410 and the number of the second sound generating structure 420 are both even.

[0096] For example, the first sound generating structure 410 and the second sound generating structure 420 can both have the shape of a trapezoid. Of course, it can be understood that the first sound generating structure 410 and the second sound generating structure 420 can also have the shape of a rectangle, a triangle, etc., which are not limited in the present embodiment.

[0097] The loudspeaker provided in the present embodiment has the first sound generating structure 410 and the second sound generating structure 420 in the same layer, and the first sound generating structure 410 is connected to the first diaphragm assembly 200, and the second sound generating structure 420 is connected to the second diaphragm assembly 300, and drives the first diaphragm assembly 200 and the second diaphragm assembly 300 to vibrate in opposite directions, so as to achieve the thinnest loudspeaker on the basis of the double diaphragm structure, reduce the space occupied by the loudspeaker in the first direction X, and also have the effect of shock absorption.

[0098] Embodiment Two

[0099] The difference between the present embodiment and Embodiment One lies in the specific structure of the vibration assembly.

[0100] As shown in Figure 9 and Figure 10 When the first sound generating structure 410 and the second sound generating structure 420 are both provided with a plurality of, the plurality of first sound generating structures 410 and the plurality of second sound generating structures 420 are not arranged alternately along the third direction Z, but there are a plurality of second sound generating structures 420 between the two first sound generating structures 410 arranged at intervals along the third direction Z. It can be understood that a plurality of first sound generating structures 410 can also be arranged between the two second sound generating structures 420 arranged at intervals along the third direction Z, which are not limited in the present embodiment.

[0101] For example, when there are a plurality of second sound generating structures 420 between the two first sound generating structures 410 arranged at intervals along the third direction Z, the plurality of second sound generating structures 420 between the two first sound generating structures 410 are connected to the same second connecting piece 440.

[0102] In some alternative embodiments, as shown in Figure 9 and Figure 10As shown, two first sound generating structures 410 adjacent in the third direction are connected to the same first connecting piece 430. Moreover, the first connecting piece 430 is arranged across the plurality of second sound generating structures 420, and the portion of the first connecting piece 430 opposite to the plurality of second sound generating structures 420 is protruded in a direction away from the plurality of second sound generating structures 420 and connected to the first diaphragm assembly 200, so as to realize the connection of the two first sound generating structures 410 and the first diaphragm assembly 200. By protruding the portion of the first connecting piece 430 opposite to the plurality of second sound generating structures 420 in a direction away from the plurality of second sound generating structures 420, on the one hand, the connection with the first diaphragm assembly 200 is facilitated, and on the other hand, the vibration space of the plurality of second sound generating structures 420 can be reserved, so that the first connecting piece 430 does not interfere with the vibration of the second sound generating structure 420, and the second sound generating structure 420 does not collide with the first connecting piece 430 when vibrating, so as to prevent the loudspeaker from generating noise and ensure the accuracy of the driving of the second diaphragm assembly 300 by the second sound generating structure 420.

[0103] The specific structure of the first connecting piece 430 in the embodiment is the same as that in Embodiment 1, and the embodiment is not limited in this regard.

[0104] The other structures in the embodiment are similar to the corresponding structures in Embodiment 1 and have similar beneficial effects, which are not described herein.

[0105] It should be noted that the above are only preferred embodiments of the present application and the technical principles applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A loudspeaker characterised in that, The application relates to a loudspeaker, comprising: a support (100) having an upper surface (110) and a lower surface (120) oppositely arranged in a first direction (X); a first diaphragm assembly (200) having a periphery fixedly connected to the upper surface (110) of the support (100); a second diaphragm assembly (300) having a periphery fixedly connected to the lower surface (120) of the support (100); a vibration assembly (400) arranged between the first diaphragm assembly (200) and the second diaphragm assembly (300), the vibration assembly (400) comprising a first sound radiating structure (410) and a second sound radiating structure (420) arranged in the same layer on the support (100), the first sound radiating structure (410) comprising a first free end (412) and a first fixed end (411), the first fixed end (411) being connected to one end of the support (100), and the first free end (412) being fixedly connected to the first diaphragm assembly (200), the first sound radiating structure (410) being capable of driving the first diaphragm assembly (200) to vibrate in the first direction (X); the second sound radiating structure (420) comprising a second free end (422) and a second fixed end (421), the second fixed end (421) being connected to the other end of the support (100), and the second free end (422) being fixedly connected to the second diaphragm assembly (300), the second sound radiating structure (420) being capable of driving the second diaphragm assembly (300) to vibrate in the first direction (X).

2. The loudspeaker of claim 1, wherein, The vibration assembly (400) further comprises a first connecting member (430) connected between the first free end (412) and the first diaphragm assembly (200); and / or, The vibration assembly (400) further comprises a second connecting member (440) connected between the second free end (422) and the second diaphragm assembly (300).

3. The loudspeaker of claim 1, wherein, The first sound radiating structure (410) is provided in plurality, the vibration assembly (400) further comprises a first connecting member (430) connected to the first diaphragm assembly (200), the first connecting member (430) is provided in one, the first free end (412) of each of the plurality of first sound radiating structures (410) is connected to the first connecting member (430) to be connected to the first diaphragm assembly (200) through the first connecting member (430), or the first connecting member (430) is provided in plurality, and each of the first connecting members (430) is connected to the first free end (412) of at least one of the first sound radiating structures (410).

4. The loudspeaker of claim 3, wherein, The second sound generating structure (420) is provided with a plurality of second sound generating structures (420), and the vibration assembly (400) further comprises a second connecting member (440) connected to the second diaphragm assembly (300); the second connecting member (440) is provided with one, and the second free end (422) of each of the plurality of second sound generating structures (420) is connected to the second connecting member (440), so as to be connected to the second diaphragm assembly (300) through the second connecting member (440); or the second connecting member (440) is provided with a plurality of second connecting members (440), and each of the second connecting members (440) is connected to the second free end (422) of at least one of the second sound generating structures (420).

5. The loudspeaker of claim 1, wherein, The first free end (412) of the first sound generating structure (410) and the first fixed end (411) are oppositely arranged along a second direction (Y); the second free end (422) of the second sound generating structure (420) and the second fixed end (421) are oppositely arranged along the second direction (Y).

6. The loudspeaker of claim 5, wherein, The first sound generating structure (410) and the second sound generating structure (420) are at least partially overlapped in a third direction (Z); wherein the third direction (Z) is perpendicular to the first direction (X) and the second direction (Y).

7. The loudspeaker of claim 6, wherein, The first sound generating structure (410) and the second sound generating structure (420) are each provided with a plurality of sound generating structures (420), and the plurality of first sound generating structures (410) and the plurality of second sound generating structures (420) are alternately arranged in the third direction (Z).

8. The loudspeaker of claim 7, wherein, The vibration assembly (400) further comprises a first connecting member (430), and two adjacent first free ends (412) in the third direction (Z) are connected to the same first connecting member (430), the first connecting member (430) is arranged across the second sound generating structure (420) between the two first free ends (412), and the part of the first connecting member (430) opposite to the second sound generating structure (420) is protruded in a direction away from the second sound generating structure (420).

9. The loudspeaker of claim 6, wherein, The first sound generating structure (410) and the second sound generating structure (420) are each provided with a plurality of sound generating structures (420), and there are a plurality of second sound generating structures (420) between two first sound generating structures (410) arranged at intervals in the third direction (Z); The vibration assembly (400) further comprises a second connecting member (440), and the plurality of second sound generating structures (420) between the two first sound generating structures (410) are connected to the same second connecting member (440), and the second connecting member (440) is connected to the second diaphragm assembly (300).

10. The loudspeaker of claim 9, wherein, The vibration assembly (400) further comprises a first connecting member (430), two adjacent first free ends (412) in the third direction (Z) are connected to the same first connecting member (430), the first connecting member (430) is arranged across the second sound generating structures (420) between the two first free ends (412), and the part of the first connecting member (430) opposite to the second sound generating structures (420) is convex in the direction away from the second sound generating structures (420).

11. The loudspeaker of claim 1, wherein, The width of the first sound generating structure (410) gradually decreases in the direction from the first fixed end (411) to the first free end (412); and / or, the width of the second sound generating structure (420) gradually decreases in the direction from the second fixed end (421) to the second free end (422).

12. The loudspeaker of any one of claims 1-11, wherein, The vibration direction of the first diaphragm assembly (200) is opposite to the vibration direction of the second diaphragm assembly (300).

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