Sound production device and electronic equipment

Abstract

The invention belongs to the technical field of acoustic-electric conversion, and discloses a sound production device and electronic equipment, the sound production device comprises a shell and a sound production monomer, the shell is provided with a first sound outlet, and two shell walls of the shell in a first direction are provided with assembly holes; the sound production single body is provided with a second sound outlet, and the second sound outlet is communicated with the first sound outlet. The sound production single body comprises a supporting assembly, a vibration assembly and an actuating assembly, the two ends of the supporting assembly in the first direction are correspondingly installed in the assembling holes, the vibration assembly and the actuating assembly are arranged on the supporting assembly, and the actuating assembly provides electric field force for driving the vibration assembly to vibrate in the first direction. The sound production device and the electronic equipment provided by the invention have relatively high flexibility and relatively low cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of acoustic-electric conversion, and in particular to a sound generating device and electronic equipment. BACKGROUND

[0002] A moving-coil loudspeaker generally comprises a magnetic circuit system, a voice coil and a diaphragm. The amplitude space of the diaphragm is affected by the magnetic circuit system, the voice coil and other structures. The proportion in the thickness direction of the loudspeaker is usually only about 30%-60%, which limits the upper limit of the low frequency sensitivity of the loudspeaker.

[0003] In related technologies, an electrostatic loudspeaker can effectively improve the low frequency sensitivity without the need to set a voice coil and a magnetic circuit system. The electrostatic loudspeaker utilizes the synergistic effect of an audio signal source and a direct current polarization power supply to cause the diaphragm (i.e., a movable electrode) to accumulate a certain density of electric charges on the surface, so that the diaphragm is affected by a directionally alternating electric field and vibrates to produce sound along with the audio signal source. The electrostatic loudspeaker generally comprises a shell, a diaphragm and a back plate. The diaphragm comprises an elastic film and a conductive layer arranged on the surface of the elastic film. The back plate is provided with two back plates respectively located on both sides of the diaphragm. The back plate comprises a layer of electret material. The conductive layer inputs an alternating audio voltage, and the electret material layer stores hetero-charges to provide an electric field force to drive the diaphragm. However, the diaphragm and the back plate are usually directly fixedly connected to the inner wall of the shell, for example, by a gluing manner. When the shape and size of the installation space of the electrostatic loudspeaker are different, in order to adapt to different shells, the structure inside the loudspeaker of the corresponding size needs to be re-manufactured, which also has the problems of high cost and low flexibility. SUMMARY

[0004] A first object of the present application is to provide a sound generating device to solve the technical problems of high cost and poor flexibility in the prior art.

[0005] A second object of the present application is to provide an electronic equipment which can have a lower cost.

[0006] As conceived above, the technical solution adopted by the present application is:

[0007] The sound generating device comprises:

[0008] The shell is provided with a first sound outlet, and both shell walls of the shell in the first direction are provided with assembly holes.

[0009] The sound production monomer is provided with a second sound outlet which is communicated with the first sound outlet; the sound production monomer comprises a support assembly, a vibration assembly and an actuating assembly, both ends of the support assembly in the first direction are correspondingly installed in the assembly hole, the vibration assembly and the actuating assembly are arranged in the support assembly, and the actuating assembly provides an electric field force for driving the vibration assembly to vibrate in the first direction.

[0010] In one of the embodiments, the vibration assembly comprises at least one diaphragm and at least one first polarity structure, and the actuating assembly comprises at least two second polarity structures;

[0011] The inner periphery of the diaphragm is correspondingly connected to the first polarity structure, and the outer periphery of the diaphragm is connected to the support assembly;

[0012] The second polarity structure is connected to the support assembly, the first polarity structure and the second polarity structure are alternately arranged along the first direction, and the second polarity structure is arranged on both sides of any one of the first polarity structures in the first direction;

[0013] In the embodiment, one of the first polarity structure and the second polarity structure comprises an electrode layer, and the other one comprises an electret layer.

[0014] In one of the embodiments, the diaphragm, the first polarity structure connected to the diaphragm, the second polarity structure and the support assembly form a front sound cavity, and the front sound cavity is communicated with the second sound outlet;

[0015] The diaphragm, the first polarity structure, the second polarity structure on the other side of the diaphragm and the support assembly form a rear cavity.

[0016] In one of the embodiments, the diaphragm is an electric conductor; and / or, the diaphragm is provided with an electrically conductive structure.

[0017] In one of the embodiments, the diaphragm is electrically connected to the first polarity structure.

[0018] In one of the embodiments, the sound production device further comprises a first electric connector, the first polarity structure comprises an electrode layer; the first electric connector is correspondingly arranged with the first polarity structure, one end of the first electric connector is electrically connected to an external power supply, and the other end of the first electric connector is electrically connected to the electrode layer of the corresponding first polarity structure.

[0019] In one of the embodiments, the support assembly is provided with a through hole in the first direction, the vibration assembly and the actuating assembly are arranged in the through hole, and in the first direction, the plurality of second polarity structures include two outer second polarity structures, which are arranged in two apertures of the through hole and exposed to the shell through the assembly hole.

[0020] In one of the embodiments, the sound generating device further comprises a second electrical connector, the second polarity structure comprises an electrode layer, the second polarity structure between the two outer second polarity structures is an inner second polarity structure, the second electrical connector is arranged corresponding to the inner second polarity structure, one end of the second electrical connector is electrically connected to an external power supply, and the other end of the second electrical connector is electrically connected to the electrode layer of the corresponding inner second polarity structure.

[0021] In one of the embodiments, a support seat is arranged in the shell.

[0022] The first electrical connector is arranged in the support seat, or the second electrical connector is arranged in the support seat.

[0023] In one of the embodiments, the diaphragm is arranged in a convex manner in the first direction.

[0024] In one of the embodiments, the sound generating device further comprises an insulating member, the insulating member is connected to the shell, and the insulating member is one-to-one corresponding to the assembly hole.

[0025] In one of the embodiments, the insulating member is provided with a notch, at least part of the actuating assembly is exposed by the notch to form an electrical connection part.

[0026] In one of the embodiments, the support assembly is a split structure and comprises a plurality of support structures, the plurality of support structures are sequentially connected in the first direction, and two support structures located on both sides in the first direction are correspondingly arranged in the assembly hole.

[0027] The vibration assembly is clamped between the two adjacent support structures.

[0028] The actuating assembly is connected to the support structure.

[0029] In one of the embodiments, the first polarity structure comprises the electrode layer, and the second polarity structure comprises an electret layer.

[0030] When the first polarity structure is provided with a plurality of, in the first direction, the electrode layers of the two adjacent first polarity structures are connected to the same electrode of an external power supply.

[0031] The electrets of two second polarity structures adjacent in the first direction are opposite in electric property.

[0032] An electronic device comprising the sound emitting device as described above.

[0033] Advantages of the present application:

[0034] The two shell walls of the sound emitting device in the first direction are provided with assembly holes, the sound emitting unit comprises a supporting assembly, a vibrating assembly and an actuating assembly, the actuating assembly is used to generate an electric field force for driving the vibrating assembly to vibrate, the vibrating assembly and the actuating assembly are both arranged on the supporting assembly, and the vibrating assembly can vibrate relative to the supporting assembly, the two ends of the supporting assembly in the first direction are mounted on the assembly holes, thereby realizing the connection between the supporting assembly and the shell, and the connection between the sound emitting unit and the shell, when the shape and size of the shell change, only the assembly holes matched with the sound emitting unit need to be arranged on the shell, and the sound emitting unit can be mounted on the shell through the assembly holes on the shell, without changing the structure and shape inside the sound emitting unit, thereby obtaining the sound emitting device meeting the size requirements, and the sound emitting device has higher flexibility and lower cost.

[0035] The electronic device can have higher flexibility and lower cost. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed 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.

[0037] Figure 1 is a structural schematic diagram of a sound emitting device provided by an embodiment of the present application;

[0038] Figure 2 is an exploded view of a sound emitting device provided by an embodiment of the present application;

[0039] Figure 3 is an exploded view of a sound emitting unit provided by an embodiment of the present application;

[0040] Figure 4 is an exploded view of a vibrating assembly and a supporting member provided by an embodiment of the present application;

[0041] Figure 5 is a top view of a sound emitting device provided by an embodiment of the present application;

[0042] Figure 6 isFigure 5 the B-B sectional view shown;

[0043] Figure 7 is Figure 5 the A-A sectional view shown;

[0044] Figure 8 is a structural schematic view of another sound generating device provided by Embodiment Two of the present application;

[0045] Figure 9 is an exploded view of another sound generating device provided by the present application;

[0046] Figure 10 is a structural schematic view of another bottom shell provided by the present application;

[0047] Figure 11 is an exploded view of another sound generating unit provided by the present application;

[0048] Figure 12 is a sectional view of another sound generating device provided by the present application;

[0049] Figure 13 is a sectional view of a sound generating device with multiple diaphragms provided by the present application;

[0050] Figure 14 is a structural schematic view of still another sound generating device provided by the present application;

[0051] Figure 15 is an exploded view of still another sound generating device provided by the present application;

[0052] Figure 16 is a structural schematic view of still another sound generating unit provided by the present application;

[0053] Figure 17 is a first sectional view of still another sound generating device provided by the present application;

[0054] Figure 18 is a second sectional view of still another sound generating device provided by the present application;

[0055] Figure 19 is a structural schematic view of yet another sound generating device provided by the present application;

[0056] Figure 20 is an exploded view of yet another sound generating device provided by the present application;

[0057] Figure 21 is an exploded view of yet another sound generating unit provided by the present application;

[0058] Figure 22is a sectional view of another sound production unit provided by an embodiment of the present application.

[0059] In the drawings:

[0060] 1, housing; 11, first sound outlet; 12, assembly hole; 13, bottom shell; 14, cover body; 15, thickened portion; 16, first limiting groove; 17, support seat; 18, remaining cavity; 2, sound production unit; 21, second sound outlet; 22, support assembly; 221, through hole; 222, support structure; 223, protruding rib; 23, vibration assembly; 231, diaphragm; 2311, second groove; 2312, first groove; 232, first polarity structure; 24, actuating assembly; 241, second polarity structure; 2411, outer second polarity structure; 2412, inner second polarity structure; 25, communication hole; 31, front sound cavity; 32, rear cavity; 41, first electrical connecting member; 42, second electrical connecting member; 5, insulating member; 51, notch; 6, support member; X, first direction. DETAILED DESCRIPTION

[0061] To make the technical problems solved by the present application, the technical solutions adopted and the technical effects reached more clear, the technical solutions of the present application will be further described below in conjunction with the accompanying drawings and through specific embodiments. It can be understood that the specific embodiments described here are only used to explain the present application, but not to limit the present application. In addition, it should be noted that only the parts related to the present application are shown in the drawings for the convenience of description, but not all.

[0062] It should be understood that the "one embodiment" or "an embodiment" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily mean in the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner.

[0063] It should be noted that: similar reference numerals 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 subsequent drawings.

[0064] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood in a broad sense, 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 an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0065] In the present application, unless specifically stated and limited otherwise, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature "under", "below" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature. In the description of the present embodiment, "a plurality of" specifically refers to two or more than two, unless otherwise specified.

[0066] In the description of the present embodiment, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and other orientation or position relationships are based on the orientation or position relationship shown in the drawings, which are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0067] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be a mediating element.

[0068] The technical solutions of the present application will be further described below in conjunction with the drawings and through specific embodiments.

[0069] The present embodiment provides a sound generating device which can have higher flexibility and lower cost.

[0070] Exemplarily, as shown in Figures 1 to 22 The sound generating device includes a shell 1 and a sound generating body 2. The sound generating body 2 is mounted in the shell 1.

[0071] In some optional embodiments, the sound generating body 2 and the shell 1 can be connected in various ways. In one embodiment, the sound generating body 2 can be clamped to the shell 1. In another embodiment, the sound generating body 2 can be magnetically connected to the shell 1. In other embodiments, the sound generating body 2 can also be bolted to the shell 1, and the present embodiment does not limit this.

[0072] The shape of the shell 1 in the embodiment can be set according to requirements. For example, as shown in Figure 1 , the shell 1 can be cuboid-shaped, and the shell 1 has a length direction, a width direction, and a height direction. Of course, it can be understood that the shell 1 can also be cylindrical, circular truncated cone-shaped, prismatic, prismatic truncated cone-shaped, etc., and the embodiment does not limit this. In the embodiment, the height direction of the shell 1 is referred to as the first direction X.

[0073] For example, as shown in Figure 2 , the shell 1 is provided with a first sound outlet 11, and the sound emitted by the sound emitting unit 2 can be transmitted out of the shell 1 through the first sound outlet 11. In one embodiment, the first sound outlet 11 can be provided with one, and at this time, the first sound outlet 11 can be arranged on the side wall, top wall or bottom wall of the shell 1. In the embodiment, the first sound outlet 11 is arranged on the side wall of the shell 1. In other embodiments, the first sound outlet 11 can also be provided with a plurality of first sound outlets 11, and each first sound outlet 11 can be arranged on the side wall, top wall or bottom wall of the shell 1, and the embodiment does not limit this.

[0074] The shape and size of the first sound outlet 11 can be set according to requirements, and the first sound outlet 11 in the embodiment is rectangular.

[0075] Please continue to refer to Figure 2 , both shell walls of the shell 1 in the first direction X are provided with assembly holes 12, and the assembly holes 12 are used to assemble the sound emitting unit 2. The shape and size of the assembly hole 12 are matched with the shape and size of the sound emitting unit 2, so as to facilitate the installation of the sound emitting unit 2.

[0076] For example, as shown in Figure 2 , the sound emitting unit 2 is provided with a second sound outlet 21, and the second sound outlet 21 is in communication with the first sound outlet 11, so that the sound generated by the sound emitting unit 2 can enter the first sound outlet 11 through the second sound outlet 21. In some optional embodiments, the second sound outlet 21 and the first sound outlet 11 can be directly opposite and in communication. In other optional embodiments, the second sound outlet 21 and the first sound outlet 11 can also be in communication through a sound channel, and the embodiment does not limit this.

[0077] Please combine Figure 2 and Figure 3The sound emitting monomer 2 comprises a supporting assembly 22, a vibrating assembly 23 and an actuating assembly 24. The two ends of the supporting assembly 22 in the first direction X correspond to the two assembly holes 12 respectively, and the two ends of the supporting assembly 22 in the first direction X are correspondingly installed in the assembly holes 12, thereby realizing the connection between the entire sound emitting monomer 2 and the shell 1. The vibrating assembly 23 and the actuating assembly 24 are both arranged on the supporting assembly 22. The actuating assembly 24 provides an electric field force for the vibration of the vibrating assembly 23, so that the vibrating assembly 23 vibrates to emit sound. The sound emitted by the vibrating assembly 23 is transmitted through the second sound outlet 21 and the first sound outlet 11. In this embodiment, the force for driving the vibration of the vibrating assembly 23 is an electric field force. Therefore, the sound emitting device in this embodiment can be an electrostatic sound emitting device.

[0078] The sound emitting device provided in this embodiment is characterized in that the two shell walls of the shell 1 in the first direction X are provided with the assembly holes 12, the sound emitting monomer 2 comprises the supporting assembly 22, the vibrating assembly 23 and the actuating assembly 24, the actuating assembly 24 is used to generate an electric field force for driving the vibration of the vibrating assembly 23, so that the vibrating assembly 23 vibrates to emit sound under the driving of the electric field force, the vibrating assembly 23 and the actuating assembly 24 are both arranged on the supporting assembly 22, and the vibrating assembly 23 can vibrate relative to the supporting assembly 22, the two ends of the supporting assembly 22 in the first direction X are installed in the assembly holes 12, thereby realizing the connection between the supporting assembly 22 and the shell 1, and thereby realizing the connection between the sound emitting monomer 2 and the shell 1. When the shape and size of the shell 1 change, only the assembly holes 12 suitable for the sound emitting monomer 2 need to be arranged on the shell 1. The sound emitting monomer 2 can be installed on the shell 1 through the assembly holes 12 on the shell 1, without the need to change the structure and shape inside the sound emitting monomer 2. Thus, a sound emitting device meeting the size requirements is obtained, so that the sound emitting device has high flexibility and low cost.

[0079] In addition, the sound emitting monomer 2 as a whole is connected with the shell 1. The sound emitting monomer 2 can be mass-produced, and then installed in the shell 1 with different structures. This can improve the production and assembly efficiency of the sound emitting device.

[0080] In at least one embodiment, the vibration assembly 23 comprises at least one diaphragm 231 and at least one first polarity structure 232, the number of the diaphragms 231 is the same as the number of the first polarity structures 232 and each diaphragm 231 corresponds to one first polarity structure 232. The actuation assembly 24 in this embodiment comprises at least two second polarity structures 241. In this embodiment, the vibration assembly 23 comprises one diaphragm 231 and one first polarity structure 232. The inner periphery of the diaphragm 231 is connected to the first polarity structure 232, and the outer periphery of the diaphragm 231 is connected to the support assembly 22. The second polarity structure 241 is connected to the support assembly 22, and the first polarity structure 232 and the second polarity structure 241 are arranged alternately along the first direction X, and each first polarity structure 232 is provided with a second polarity structure 241 on both sides in the first direction X. In this embodiment, one first polarity structure 232 is provided between two second polarity structures 241. The first polarity structure 232 and the second polarity structure 241 cooperate with each other to enable the first polarity structure 232 to vibrate in the first direction X, thereby driving the diaphragm 231 to vibrate.

[0081] In this embodiment, one of the first polarity structure 232 and the second polarity structure 241 comprises an electrode layer, and the other comprises an electret layer. In this embodiment, the electrode layer is electrically connected to an external power source, and the external power source inputs a voltage to the electrode layer. For example, the external power source inputs an alternating current to the electrode layer. In some alternative embodiments, the external power source inputs an alternating audio voltage to the electrode layer, so that the size and frequency of the alternating current input to the electrode layer can be adjusted according to requirements, thereby enabling the diaphragm 4 to have vibrations with different amplitudes and frequencies. It should be noted that the second polarity structure 241 is arranged in the housing 1, and the second polarity structure 241 does not move or vibrate relative to the housing 1.

[0082] In this embodiment, the first polarity structure 232 comprises an electrode layer, which can be understood as that at least part of the first polarity structure 232 is composed of an electrode layer, or that the entire first polarity structure 232 is an electrode layer, which is not limited in this embodiment. The second polarity structure 241 comprises an electrode layer, which can be understood as that at least part of the second polarity structure 241 is composed of an electrode layer, or that the entire second polarity structure 241 is an electrode layer, which is not limited in this embodiment.

[0083] In this embodiment, the first polarity structure 232 comprises an electret layer, which can be understood as that at least part of the first polarity structure 232 is composed of an electret layer, or that the entire first polarity structure 232 is an electret layer, which is not limited in this embodiment. The second polarity structure 241 comprises an electret layer, which can be understood as that at least part of the second polarity structure 241 is composed of an electret layer, or that the entire second polarity structure 241 is an electret layer, which is not limited in this embodiment.

[0084] The electret layer in the embodiment stores electric charges. The two adjacent electret layers can cooperate with each other to form an electrostatic field to drive the second polarity structure 241 to vibrate. The electrostatic field can also be formed between the two adjacent electrode layers to drive the second polarity structure 241 to vibrate, which is not limited in the embodiment.

[0085] In the embodiment, the first polarity structure 232 and the second polarity structure 241 cooperate with each other to drive the diaphragm 231 to vibrate, thereby realizing sound generation. In the embodiment, the vibration direction of the diaphragm 231 is the first direction X. It should be further noted that the first polarity structure 232 and the second polarity structure 241 cooperate with each other to make the first polarity structure 232 vibrate in the first direction X, thereby driving the diaphragm 231 to vibrate in the first direction X.

[0086] The sound generation unit provided in the embodiment is driven by the electric field force to vibrate the diaphragm 231, which greatly utilizes the space of the shell 1 in the first direction X. When the second polarity structure 241 connected to the diaphragm 231 vibrates in the first direction X, the maximum vibration amplitude can be close to the interval between the adjacent second polarity structure 241 and the first polarity structure 232, thereby improving the vibration amplitude space of the sound generation unit, improving the ratio of the vibration amplitude of the sound generation unit in the first direction X to the thickness of the shell 1, and achieving the purpose of improving the low-frequency amplitude. Without stacking multiple sound generation units, the purpose of increasing the low-frequency sensitivity can be achieved, and on the basis of improving the low-frequency sensitivity, the sound generation unit can be relatively thin and can be applied to electronic devices with high space requirements.

[0087] In addition, since the diaphragm 231 in the embodiment is driven by the electric field force, there is no interfering component in the vibration process of the diaphragm 231 and the first polarity structure 232, and there is no risk of voice coil disconnection and overheating, which has high reliability.

[0088] In addition, since the electric field force generated by the sound generation unit is relatively uniform, the distortion is very small, and the stability and acoustic performance of the sound generation unit are improved.

[0089] Exemplarily, as shown in Figure 6 and Figure 7 , the two adjacent second polarity structures 241 are oppositely arranged and parallel arranged in the first direction X. The two second polarity structures 241 are respectively connected to two ends of an external power supply (specifically, an alternating current power supply), and the two second polarity structures 241 are opposite in polarity, so that an electric field can be generated between the two adjacent second polarity structures 241.

[0090] The electric charges in the first polarity structure 232 are affected by the electric field force between the two second polarity structures 241, and the first polarity structure 232 can vibrate. Since the first polarity structure 232 is arranged between the two second polarity structures 241, the first polarity structure 232 is attracted to one of the second polarity structures 241 and repelled by the other second polarity structure 241, so that the first polarity structure 232 vibrates, and since the two second polarity structures 241 are connected to the two ends of the alternating current power supply, the polarities of the two second polarity structures 241 are always opposite, and can continuously provide driving force for the first polarity structure 232.

[0091] In some optional embodiments, the first polarity structure 232 is arranged in parallel with the second polarity structure 241, so that the force acting on the first polarity structure 232 can be more balanced, thereby ensuring the stability of sound production.

[0092] Optionally, the first polarity structure 232 is a flat structure, and when the first polarity structure 232 includes an electret layer, the electret layer is flat, and the electric charges can be uniformly distributed in the electret layer.

[0093] In some embodiments, the second polarity structure 241 is a flat structure.

[0094] In at least one embodiment, the electret layer has a high charge density, so as to be able to cooperate with the second polarity structure 241 to generate a larger electric field force.

[0095] In one embodiment, the specific surface area of the electret layer is greater than or equal to 100 mm 2 / mm 3 When the specific surface area of the electret layer is greater than or equal to 100 mm 2 / mm 3 , the charge density of the electret layer can be higher, so as to ensure the strength of the electric field force. It should be noted that the specific surface area of the electret layer refers to the ratio of the surface area to the volume of the electret layer.

[0096] Further optionally, the specific surface area of the electret layer is greater than or equal to 600 mm 2 / mm 3 .

[0097] In some optional embodiments, the total amount of electric charges in the electret layer is greater than or equal to 1 coulomb, so as to have a sufficient amount of electric charges, thereby ensuring the service life.

[0098] Optionally, the electric charges in the electret layer can be positive charges or negative charges. This embodiment is not limited in this regard. When the electric charges in the electret layer are negative charges, since the volume of electrons is small, the charge density can be improved.

[0099] In one implementation, the charge in the electret layer is negative charge, and the surface charge density of the electret layer is greater than or equal to 10 -3 C / m 2 When the surface charge density of the electret layer is greater than or equal to 10 -3 C / m 2 , the charge can have a high density, thereby ensuring the uniformity and strength of the electric field force generated. It should be noted that the surface charge density refers to the number of charges per unit area.

[0100] Further optionally, the surface charge density of the electret layer is greater than or equal to 10 -2 C / m 2 .

[0101] In at least one embodiment, the material of the electret layer includes SiO2, Si3N4, or other materials. When the material of the electret layer is SiO2 or Si3N4, more charges can be stored.

[0102] Optionally, the first polarity structure 232 further includes a protective layer (not shown in the figure) covering the electret layer. By providing the protective layer, on the one hand, the electret layer can be protected; on the other hand, the rigidity of the first polarity structure 232 as a whole can be improved, thereby effectively improving the high-frequency characteristics.

[0103] In some optional embodiments, the material of the protective layer includes polyethylene naphthalate (PEN), polyethylene terephthalate (PET), or other high molecular materials.

[0104] In some optional embodiments, the material of the electrode layer is a metal material. For example, the material of the electrode layer is a metal material such as copper or copper alloy, which is not limited in the present embodiment.

[0105] Optionally, the specific structure of the sound emitting monomer provided in the present embodiment can have various structures. For example, the sound emitting monomer can be classified into a structure with a single diaphragm 231 and a structure with multiple diaphragms 231 according to the number of diaphragms 231. According to the number of diaphragms 231, the number of first polarity structures 232 and the number of second polarity structures 241 will also be different, which will be described in detail below.

[0106] Exemplarily, Figures 1 to 7 is a schematic diagram of the sound emitting monomer provided in the present embodiment having one diaphragm 231, and the first polarity structure 232 includes an electret layer, and the second polarity structure 241 includes an electrode layer.

[0107] In at least one embodiment, as Figures 1 to 7As shown, the first polarity structure 232 includes an electret layer and is provided with one, and the diaphragm 231 is provided with one and connected to the first polarity structure 232. The second polarity structure 241 includes an electrode layer and is provided with two, and the two second polarity structures 241 are located on two sides of the first polarity structure 232. After the external power supply inputs alternating current to the electrode layers of the two second polarity structures 241 respectively, an electric field can be generated between the two second polarity structures 241. The electric charges in the first polarity structure 232 are affected by the electric field force to generate vibration, thereby driving the diaphragm 231 to vibrate.

[0108] It should be noted that in the embodiment, the electrode layers of the two second polarity structures 241 are connected to opposite electrodes of the external power supply, that is, one of the electrode layers of the two second polarity structures 241 is a positive electrode, and the other is a negative electrode.

[0109] In at least one embodiment, the diaphragm 231 is an electric conductor, that is, the diaphragm 231 is a conductor. By setting the diaphragm 231 as an electric conductor, the external power supply can be electrically connected to the first polarity structure 232 through the diaphragm 231. When the first polarity structure 232 includes an electret layer, the external power supply can supplement the lost electric charges of the first polarity structure 232 through the diaphragm 231 to ensure the amount of electric charges affected by the electric field force in the electric field. When the first polarity structure 232 includes an electrode layer, the external power supply can be electrically connected to the electrode layer through the diaphragm 231. For example, the diaphragm 231 being an electric conductor can be realized by the diaphragm 231 itself being formed of an electrically conductive material.

[0110] Of course, it can be understood that the diaphragm 231 itself can not be an electrically conductive structure, but an electrically conductive structure is arranged on the diaphragm 231, which is not limited in the embodiment. For example, electrically conductive particles, electrically conductive wires (such as silver wires, copper wires, etc.), electrically conductive coatings, electrically conductive strips, etc. can be added to the material forming the diaphragm 231 to obtain the diaphragm 231 provided with an electrically conductive structure, which is not limited in the embodiment.

[0111] It can be understood that the diaphragm 231 itself can be an electric conductor, and an electrically conductive structure is arranged on the diaphragm 231, which is not limited in the embodiment.

[0112] Optionally, when the diaphragm 231 is an electrically conductive structure, the diaphragm 231 is electrically connected to the first polarity structure 232 to facilitate the provision of electric charges to the first polarity structure 232.

[0113] In one embodiment, as Figure 4As shown, the diaphragm 231 is provided with a second groove 2311 located at the inner periphery of the diaphragm 231, the outer periphery of the first polarity structure 232 is arranged in the second groove 2311, and the first polarity structure 232 is fixedly and electrically connected with the groove wall of the second groove 2311. By arranging the second groove 2311, the connection area of the first polarity structure 232 and the diaphragm 231 can be increased, thereby improving the connection strength of the first polarity structure 232 and the diaphragm 231, reducing the risk of separation of the first polarity structure 232 and the diaphragm 231 during vibration, and improving the connection strength and connection reliability.

[0114] Optionally, please continue to see Figure 4 As shown, the second groove 2311 is an L-shaped groove, and the depth of the second groove 2311 is equal to the thickness of the first polarity structure 232. Of course, it can be understood that the second groove 2311 can also be a U-shaped groove, and the edge of the first polarity structure 232 is inserted into the U-shaped groove, which is not limited in the embodiment.

[0115] In the embodiment, the specific structure of the diaphragm 231 can be adjusted according to requirements. In one embodiment, as shown in Figure 6 and Figure 7 As shown, the diaphragm 231 is convexly arranged along the first direction X, that is, the part between the inner periphery and the outer periphery of the diaphragm 231 is convex. In this way, the area of the diaphragm 231 in contact with the air can be larger, thereby being able to push more volume of air under the same amplitude, so as to improve the low frequency sensitivity and high frequency sensitivity of the sound emitting unit 2.

[0116] Optionally, as shown in Figure 6 and Figure 7 The convex shape of the diaphragm 231 can be arc-shaped or other shapes, which is not limited in the embodiment.

[0117] In other embodiments, the diaphragm 231 can also be planar, that is, the diaphragm 231 can not have a convex shape, and vibration sound emission can also be achieved.

[0118] In at least one implementation, as shown in Figure 6 or Figure 7 As shown, the diaphragm 231, the first polarity structure 232, the second polarity structure 241 on one side of the diaphragm 231, and the support assembly 22 form the front sound cavity 31 therebetween, that is, the diaphragm 231, the first polarity structure 232 connected to the diaphragm 231, one of the two second polarity structures 241, and the support assembly 22 form the front sound cavity 31 therebetween. The front sound cavity 31 is in communication with the second sound outlet 21, the diaphragm 231 pushes the air in the front sound cavity 31 to vibrate and emit sound, and the sound in the front sound cavity 31 is transmitted out of the sound emitting device through the second sound outlet 21 and the first sound outlet 11.

[0119] In this embodiment, the front acoustic cavity 31 can also be referred to as a front cavity.

[0120] In one implementation, the back cavity 32 is enclosed by the diaphragm 231, the first polarity structure 232 connected to the diaphragm 231, the other one of the two second polarity structures 241, and the support assembly 22. In this case, the back cavity 32 is independent of the front acoustic cavity 31 and is not in communication with the front acoustic cavity 31.

[0121] In at least one embodiment, as shown in Figure 7 The volume of the housing 1 is greater than the volume of the sound production unit 2, and the sound production unit 2 is located in the housing 1. After the sound production unit 2 is located in the housing 1, the housing 1 has a remaining cavity 18. In this embodiment, the second back cavity 32 is in communication with the remaining cavity 18 in the housing 1. For example, as shown in Figure 3 The support assembly 22 can be provided with a communication hole 25. That is, the back cavity 32 is provided with a communication hole 25 on the support assembly 22, and the back cavity 32 is in communication with the remaining cavity 18 through the communication hole 25.

[0122] In this embodiment, each diaphragm 231 corresponds to one front acoustic cavity 31 and one back cavity 32. The front acoustic cavity 31 is located on one side of the diaphragm 231, and the back cavity 32 is located on the other side of the diaphragm 231.

[0123] In at least one embodiment, the housing 1 in this embodiment can be a split structure or an integrated structure. For example, as shown in Figure 2 The housing 1 includes a bottom shell 13 and a cover 14. The bottom shell 13 has an opening, and the cover 14 is mounted on the opening of the bottom shell 13 to form a relatively sealed space in cooperation with the bottom shell 13. The cover 14 and the bottom shell 13 are both provided with assembly holes 12. By providing a split housing 1, the assembly and disassembly of the sound production device can be facilitated.

[0124] When the sound production unit 2 is installed in the housing 1, the bottom shell 13 and the cover 14 can be separated first, and then one end of the support assembly 22 is assembled into the assembly hole 12 on the bottom shell 13, for example, the one end of the support assembly 22 is clamped in the assembly hole 12. Then, the cover 14 is connected with the bottom shell 13, and at the same time, the other end of the support assembly 22 is clamped and fixed with the assembly hole 12 on the cover 14, thereby realizing the fixed connection between the housing 1 and the sound production unit 2.

[0125] In one embodiment, in order to further reduce the risk of movement of the support assembly 22 relative to the housing 1, as shown in Figure 2As shown, the inner wall of the shell 1 is provided with a first limiting groove 16, which limits and supports the support assembly 22 in a direction perpendicular to the first direction X, so as to improve the connection strength of the support assembly 22 and the shell 1, and improve the structural strength and anti-falling performance of the sound production device.

[0126] In the embodiment, the assembly hole 12 is arranged at the groove bottom of the first limiting groove 16. The cover body 14 and the bottom shell 13 are both provided with the first limiting groove 16.

[0127] In one embodiment, as shown in Figure 7 As shown, the inner wall of the shell 1 is provided with a first limiting groove 16, which limits and supports the support assembly 22 in a direction perpendicular to the first direction X, so as to improve the connection strength of the support assembly 22 and the shell 1, and improve the structural strength and anti-falling performance of the sound production device.

[0128] In some optional embodiments, as shown in Figure 3 As shown, the support assembly 22 is provided with a through hole 221 in the first direction X. The vibration assembly 23 and the actuating assembly 24 are arranged in the through hole 221. By arranging the through hole 221, there is no other obstruction between the two second polarity structures 241 except the first polarity structure 232 and the diaphragm 231, so as to ensure the electric field strength. In the embodiment, the outer periphery of the diaphragm 231 is connected to the hole wall of the through hole 221, and the vibration of the diaphragm 231 will not be affected by the structure of the support assembly 22.

[0129] In one embodiment, the two second polarity structures 241 located at the edges in the first direction X correspond to the two hole openings of the through hole 221 one by one, and each second polarity structure 241 is installed in the corresponding hole opening of the through hole 221. In the embodiment, the actuating assembly 24 includes two second polarity structures 241, which correspond to the two hole openings of the through hole 221 one by one, and each second polarity structure 241 is installed in the corresponding hole opening. By installing the second polarity structure 241 in the hole opening of the through hole 221, the space of the support assembly 22 in the first direction X can be fully utilized, so that the size of the sound production unit 2 in the first direction X is equal to the interval of the two second polarity structures 241 in the first direction X, which is beneficial to the thinning and miniaturization of the sound production unit 2.

[0130] In at least one embodiment, the assembly hole 12 communicates with the through hole 221. The second polarity structure 241 located at the hole opening of the through hole 221 can be exposed to the shell 1 through the assembly hole 12, so as to facilitate the electrical connection between the second polarity structure 241 and the external power supply. Exemplarily, as shown in Figure 6 and Figure 7As shown, the first second-polarity structure 241 in the first direction X is installed in one of the assembly holes 12, and the last second-polarity structure 241 in the first direction X is installed in the other assembly hole 12.

[0131] In some optional embodiments, the end surface of the support assembly 22 in the first direction X is flush with the second-polarity structure 241 and flush with the outer surface of the housing 1. With such an arrangement, the space utilization of the housing 1 can be further improved, so that the size of the housing 1 in the first direction X can be equal to the size of the support assembly 22 in the first direction X or equal to the maximum distance between the two second-polarity structures 241, further facilitating the thinning of the sound production device.

[0132] In the present embodiment, as shown, Figure 2 the support assembly 22 is provided with a protrusion 223 at each end in the first direction X, the protrusion 223 is installed in the assembly hole 12, and the second-polarity structure 241 is installed in the space enclosed by the protrusion 223 and fixedly connected with the protrusion 223.

[0133] In one embodiment, the support assembly 22 is of a split structure. For example, as shown, Figure 3 the support assembly 22 includes a plurality of support structures 222. The plurality of support structures 222 are connected in sequence in the first direction X. The first support structure 222 and the last support structure 222 in the first direction X are correspondingly installed in the assembly holes 12. In the present embodiment, the support assembly 22 includes two support structures 222, one of which is installed in one assembly hole 12 and the other of which is installed in the other assembly hole 12.

[0134] In at least one embodiment, the vibration assembly 23 can be clamped between two adjacent support structures 222. With such an arrangement, the fixing strength of the vibration assembly 23 can be improved, and the assembly difficulty of the vibration assembly 23 can be reduced. For example, the outer periphery of the diaphragm 231 of the vibration assembly 23 is clamped and fixed between the two support structures 222.

[0135] Optionally, as shown, Figure 4 the sound production device further includes a support piece 6 fixedly connected to the outer periphery of the diaphragm 231 to improve the connection strength of the diaphragm 231 and the support structure 222. In some optional embodiments, the support structure 222 can be provided with a second limiting groove (not shown in the figure), and the support piece 6 can be fixedly arranged in the second limiting groove to improve the limiting effect on the support piece 6.

[0136] It should be noted that when the diaphragm 231 is connected with the support piece 6, the support piece 6 and the first-polarity structure 232 are located on the same side of the diaphragm 231.

[0137] In at least one embodiment, as shown in Figure 4 The diaphragm 231 is provided with a first groove 2312 cooperating with the support 6, the first groove 2312 is located at the outer periphery of the diaphragm 231, the support 6 is arranged in the first groove 2312, and the support 6 is fixedly connected with the groove wall of the first groove 2312. By arranging the first groove 2312, the connection area of the support 6 and the diaphragm 231 can be increased, thereby improving the connection strength of the support 6 and the diaphragm 231, reducing the risk of separation of the support 6 and the diaphragm 231 during vibration, and improving the connection strength and connection reliability.

[0138] It should be noted that when the diaphragm 231 is a conductor, the support 6 is not only fixedly connected with the diaphragm 231, but also electrically connected. In this way, the external power supply can pass through the support 6, the diaphragm 231 and the first polarity structure 232.

[0139] Of course, it can be understood that the vibration assembly 23 can also be fixedly connected to the support structure 222 in other ways, which is not limited in the embodiment.

[0140] In at least one embodiment, the actuating assembly 24 is connected to the support structure 222. In the embodiment, as shown in Figure 6 The two first polarity structures 232 are connected to the two support structures 222 one by one.

[0141] Of course, it can be understood that the support assembly 22 can also be an integral structure, which is not limited in the embodiment.

[0142] In some optional embodiments, as shown in Figure 1 and Figure 2 The sound generating device further comprises an insulating piece 5. The number of the insulating pieces 5 is the same as the number of the assembly holes 12 and corresponds one by one. Among them, the insulating piece 5 is connected to the shell 1 and covers the corresponding assembly hole 12. The material of the insulating piece 5 is insulating material, which is used for insulation between the sound generating monomer 2 and other equipment to improve the safety of the sound generating device.

[0143] In one embodiment, as shown in Figure 2 The insulating piece 5 is provided with a notch 51, and at least part of the actuating assembly 24 is exposed by the notch 51 to form an electrical connection part. The electrical connection part is used for electrical connection with the external power supply, so that additional wires are not needed, simplifying the structure of the sound generating device.

[0144] In the embodiment, the notch 51 is used to expose at least part of the second polarity structure 241, that is, the electrical connection part is part of the second polarity structure 241.

[0145] The sound production device provided by the embodiment is driven by the electric field force of the second polarity structure 241, greatly utilizes the space in the first direction X, so that the amplitude in the first direction X can reach 80% of the total height of the sound production unit 2, the low-frequency amplitude can be greatly improved, the low-frequency sensitivity is greatly increased, and the degree of superposition of other moving coil sound production devices 2-3 units is reached. Since the electric field force is used as the driving force for driving, the moving coil, magnetic circuit and other components in the moving coil sound production device are omitted, so that the overall structure and process steps of the sound production device are simplified. Moreover, since the electret layer is driven by the electric field force, the vibration process is not interfered by external parts, there is no risk of coil breakage or overheating, and since the electric field force is relatively uniform, the distortion is small. Moreover, the diaphragm 231 protrudes along the first direction X, so that the volume of air pushed under the same amplitude is larger, so that the sensitivity of the sound production unit 2 is larger. Moreover, the sound production unit 2 is connected with the shell 1, so that the sound production unit 2 can be applied to different shells 1, so that the sound production unit 2 has high flexibility and cost performance.

[0146] Exemplarily, as Figures 8 to 12 The sound production unit provided by the embodiment has a plurality of diaphragms 231, and the first polarity structure 232 includes an electret layer, and the second polarity structure 241 includes an electrode layer, Figures 8 to 12 The sound production device shown in Figures 1 to 7 The main difference between the sound production device shown in

[0147] As Figures 8 to 12 The sound production device in the embodiment includes a plurality of diaphragms 231, a plurality of first polarity structures 232 and a plurality of second polarity structures 241. Exemplarily, the diaphragm 231 and the first polarity structure 232 are arranged one by one, and the inner periphery of each diaphragm 231 is connected to the corresponding first polarity structure 232. The plurality of second polarity structures 241 are all connected to the support assembly 22. Figures 8 to 12 is a schematic view in which the diaphragm 231 and the first polarity structure 232 are both provided with two, and the second polarity structure 241 is provided with three. Figure 13 is a schematic view of the sound production device including more diaphragms 231, Figure 13 The drawing method is omitted.

[0148] In at least one embodiment, the plurality of first polarity structures 232 and the plurality of second polarity structures 241 are alternately arranged in the first direction X, and each first polarity structure 232 has a second polarity structure 241 on both sides in the first direction X.

[0149] The sound production device provided by the embodiment has multiple diaphragms 231, which can further improve sensitivity, and is suitable for electronic devices with high sensitivity requirements. It should be noted that, on the basis of achieving the same sound quality, sound effect and other acoustic performances as the moving coil type sound production device, the sound production unit 2 in the embodiment does not have a magnetic circuit, a voice coil and other structures, and still has the advantages of small thickness, large vibration amplitude and high low-frequency sensitivity.

[0150] In some optional embodiments, the second polarity structure 241 located between the two adjacent first polarity structures 232 in the first direction X can be provided with a through hole (not shown in the figure). By providing the through hole, the balance of the air flow on both sides of the second polarity structure 241 can be maintained, and the acoustic performance of the sound production unit 2 can be further improved. Optionally, multiple through holes can be provided to improve the balance of air flow at different positions of the second polarity structure 241. The multiple through holes can be arranged in an array or in a disorderly manner, which is not limited in the embodiment.

[0151] It should be noted that the support assembly 22 is also provided with a through hole 221, which is arranged through the support assembly 22 in the first direction X. The vibration assembly 23 and the actuating assembly 24 are arranged in the through hole 221. Figure 13 As shown in the figure, in the first direction, the multiple second polarity structures 241 include two outer second polarity structures 2411, which correspond to the two apertures of the through hole 221 one by one, and the outer second polarity structures 2411 are arranged correspondingly in the two apertures of the through hole 221, so as to facilitate the electrical connection between the electrode layer of the outer second polarity structure 2411 and the external power supply.

[0152] In some optional embodiments, when the shell 1 is connected with the insulating piece 5, the insulating piece 5 is provided with a notch 51, and at least part of the outer second polarity structure 2411 is exposed by the notch 51 to form an electrical connection part, so as to facilitate the electrical connection with the external power supply.

[0153] For the inner second polarity structure 2412 located between the two outer second polarity structures 2411, the electrical connection with the external power supply can be achieved through the second electrical connection piece 42.

[0154] In at least one embodiment, as shown in Figure 11 and Figure 12 The sound production device further includes a second electrical connection piece 42. The second electrical connection piece 42 is arranged in the same number as and one by one corresponding to the inner second polarity structure 2412. One end of the second electrical connection piece 42 is electrically connected with the external power supply, and the other end of the second electrical connection piece 42 is electrically connected with the electrode layer of the corresponding inner second polarity structure 2412. By providing the second electrical connection piece 42, the difficulty of electrical connection between the inner second polarity structure 2412 and the external power supply can be reduced, and the convenience and stability of electrical connection can be improved.

[0155] It should be noted that the second electrical connecting member 42 can be provided with one or more. When the second electrical connecting member 42 is provided with one, the plurality of inner second polarity structures 2412 are electrically connected with the second electrical connecting member 42. When the second electrical connecting member 42 is provided with more than one, the plurality of second electrical connecting members 42 are electrically connected with the plurality of inner second polarity structures 2412 one by one.

[0156] In at least one embodiment, as shown in Figure 11 The end of the second electrical connecting member 42 for connecting the external power supply can be located on the surface of the shell 1, that is, the second electrical connecting member 42 can be exposed from the surface of the shell 1 to facilitate electrical connection with the external power supply.

[0157] In some optional embodiments, the shape of the second electrical connecting member 42 can be set according to requirements. For example, the second electrical connecting member 42 in the present embodiment is Z-shaped. One end of the second electrical connecting member 42 is flush with the surface of the shell 1, so that the setting of the second electrical connecting member 42 does not increase the size of the sound production device, and does not affect the miniaturization of the sound production device.

[0158] Optionally, the second electrical connecting member 42 can be a one-piece structure or a split structure, which is not limited in the present embodiment. When the second electrical connecting member 42 is a split structure, a part of the second electrical connecting member 42 can be a one-piece structure with the corresponding inner second polarity structure 2412, which is not limited in the present embodiment.

[0159] In one embodiment, when the second electrical connecting member 42 is provided with more than one, the ends of the plurality of second electrical connecting members 42 away from the inner second polarity structures 2412 can be connected as a whole, so as to facilitate the assembly of the second electrical connecting member 42, and the part exposed from the surface of the shell 1 forms a contact part on the surface of the shell 1, thereby making it unnecessary to connect the external power supply one by one, improving the connection efficiency of the sound production device in the electronic device, and also ensuring the consistency of the alternating current input to each inner second polarity structure 2412.

[0160] In at least one embodiment, as shown in Figure 10As shown, the support seat 17 can be arranged in the housing 1 and located at one side of the support structure 222. The second electrical connecting member 42 is arranged in the support seat 17 to reduce the risk of movement of the second electrical connecting member 42 relative to the housing 1 and improve the reliability and stability of the connection of the second electrical connecting member 42 to the inner second polarity structure 2412 and the external power supply. For example, at least a part of the second electrical connecting member 42 can be embedded in the support seat 17. The housing 1 can be provided with a hole for the second electrical connecting member 42 to pass through to assist in limiting the second electrical connecting member 42. Alternatively, the support assembly 22 can also be provided with a hole for the second electrical connecting member 42 to pass through to facilitate the electrical connection of the second electrical connecting member 42 to the second polarity structure 241.

[0161] Alternatively, the second electrical connecting member 42 can be a conductive structure such as a solder pad. In this embodiment, the surface of the housing 1 exposing the second electrical connecting member 42 is the same as the surface provided with the assembly hole 12. In this way, the second electrical connecting member 42 is arranged close to the second polarity structure 241 exposed by the assembly hole 12, which shortens the length of the connecting wire of the external short circuit and the second electrical connecting member 42 and simplifies the structure of the sound generating device.

[0162] In one embodiment, when the first polarity structure 232 comprises an electret layer and the second polarity structure 241 comprises an electrode layer, and both the first polarity structure 232 and the second polarity structure 241 are provided with a plurality of structures, the electrode layers of two adjacent second polarity structures 241 in the first direction X are connected to opposite poles of the external power supply, and the electret layers of two adjacent first polarity structures 232 in the first direction X have the same electrical property.

[0163] In this way, the vibration directions of two adjacent first polarity structures 232 in the first direction X are opposite, and the movement directions of two adjacent diaphragms 231 are also opposite, i.e., two adjacent diaphragms 231 move towards each other or move away from each other at the same time, so that the two adjacent diaphragms 231 can simultaneously push or pull the air between them, thereby enhancing the acoustic performance (amplitude, frequency, etc.).

[0164] In at least one embodiment, when the diaphragm 231 is provided with a plurality of structures, each diaphragm 231 corresponds to a front sound cavity 31 and a rear cavity 32. The front sound cavities 31 of two adjacent diaphragms 231 can be independent of each other or can be connected through a through hole arranged on the first polarity structure 232, and the present embodiment does not limit the same. Each front sound cavity 31 corresponds to a second sound outlet 21 on the support assembly 22, and a plurality of second sound outlets 21 are connected to the first sound outlet 11 to enable the sound to be smoothly transmitted out. It can be understood that a plurality of second sound outlets 21 on the support assembly 22 can be connected to form one outlet, and the present embodiment does not limit the same.

[0165] In at least one implementation, as shown in Figure 12 or Figure 13 two adjacent diaphragms 231 correspond to the front sound cavities 31 and a second sound outlet 21 on the support assembly 22, that is, a second sound outlet 21 on the support assembly 22 is in communication with two front sound cavities 31, realizing the sharing of the second sound outlet 21. At this time, the number of second sound outlets 21 that need to be arranged on the support assembly 22 is reduced, and the manufacturing difficulty of the support assembly 22 is simplified. At this time, the front sound cavities 31 corresponding to the two adjacent diaphragms 231 are located on the opposite sides of the two diaphragms 231, and the back cavities 32 corresponding to the two adjacent diaphragms 231 are located on the opposite sides of the two diaphragms 231.

[0166] Of course, as shown in Figure 13 there can also be a case where the front sound cavities 31 corresponding to the two adjacent diaphragms 231 are located on the opposite sides of the two diaphragms 231, and the back cavities 32 corresponding to the two adjacent diaphragms 231 are located on the opposite sides of the two diaphragms 231. This can be flexibly adjusted according to requirements, and the present embodiment does not limit this.

[0167] In the present embodiment, a communication hole 25 is provided on the support assembly 22 corresponding to each back cavity 32, and each back cavity 32 is in communication with the residual cavity 18 of the housing 1 through the communication hole 25, thereby realizing the mutual communication between the plurality of back cavities 32.

[0168] In some embodiments, when two back cavities 32 are arranged adjacent to each other, as shown in Figure 13 the two back cavities 32 can share one communication hole 25 to reduce the arrangement of the communication hole 25 and simplify the structure of the support assembly 22.

[0169] Exemplarily, as shown in Figure 12 the two front sound cavities 31 of the two diaphragms 231 are located on the opposite sides of the two diaphragms 231, which facilitates the communication of the first sound outlet 11 and the two second sound outlets 21. The two back cavities 32 are located on the opposite sides of the two diaphragms 231.

[0170] In one embodiment, when the diaphragm 231 is provided with a plurality of diaphragms, the support assembly 22 can include a plurality of support structures 222, and the plurality of support structures 222 are connected in sequence along the first direction X. One diaphragm 231 is clamped between two adjacent support structures 222. Each second polarity structure 241 is connected to one of the support structures 222. In some optional embodiments, the support structure 222 connected to the inner side second polarity structure 2412 can be provided with a slot (not shown in the figure), and the inner side second polarity structure 2412 is inserted and fixed in the slot to improve the strength of the inner side second polarity structure 2412.

[0171] Figures 14 to 22The first polarity structure 232 provided in the embodiment includes an electrode layer, and the second polarity structure 241 includes an electret layer. The first polarity structure 232 and the diaphragm 231 are each provided with one, and the second polarity structure 241 is provided with two. The electrode layer of the first polarity structure 232 needs to be electrically connected with an external power source. Figures 14 to 18 The schematic diagram of the sound production device with one diaphragm 231 is shown in FIG. 3B. Figures 19 to 22 The schematic diagram of the sound production device with multiple diaphragms 231 is shown in FIG. 3C.

[0172] As shown in FIG. 3A, Figures 14 to 22 the first polarity structure 232 includes an electrode layer, and the second polarity structure 241 includes an electret layer. The first polarity structure 232 and the diaphragm 231 are each provided with one, and the second polarity structure 241 is provided with two. The electrode layer of the first polarity structure 232 needs to be electrically connected with an external power source.

[0173] In some optional embodiments, the electret layers of the two second polarity structures 241 adjacent in the first direction X are opposite in electric property, that is, the electric charges of the electret layers of the two second polarity structures 241 adjacent in the first direction X are opposite in electric property. In this way, a constant electric field can be formed between the two second polarity structures 241. An alternating current is passed through the first polarity structure 232, that is, one electrode of the first polarity structure 232 is electrically connected with an external power source. The alternating electric field generated by the first polarity structure 232 interacts with the constant electric field, thereby driving the first polarity structure 232 to vibrate in the first direction X, so as to drive the diaphragm 231 to vibrate and produce sound.

[0174] In some optional embodiments, since the second polarity structure 241 includes an electret layer, it does not need to be electrically connected with an external power source. Therefore, as shown in FIG. 3D, Figure 16 the insulating member 5 of the sound production device completely covers the assembly hole 12, thereby completely covering the second polarity structure 241 exposed to the shell 1, and no notch 51 is arranged.

[0175] It can be understood that when the second polarity structure 241 includes an electret layer, it can also be electrically connected with an external power source to supplement the lost electric charges of the electret layer by the external power source. At this time, the insulating member 5 can still be provided with a notch 51.

[0176] The electrode layer of the first polarity structure 232 in the embodiment needs to be electrically connected with an external power source. Therefore, as shown in FIG. 3E and FIG. 3F, Figure 15 and Figure 16 the sound production device further includes a first electrical connecting member 41. One end of the first electrical connecting member 41 is electrically connected with an external power source, and the other end of the first electrical connecting member 41 is electrically connected with the electrode layer of the first polarity structure 232, thereby realizing the electrical connection between the electrode layer of the first polarity structure 232 and the external power source.

[0177] In at least one embodiment, when the diaphragm 231 is provided with a conductive structure and / or the diaphragm 231 is a conductive body, the first electrical connecting member 41 is electrically connected with the diaphragm 231, and the electrode layer of the first polarity structure 232 is electrically connected with the diaphragm 231, so as to realize the electrical connection between the first electrical connecting member 41 and the electrode layer of the first polarity structure 232 through the diaphragm 231, without the need to additionally provide a wire, thereby reducing the problem of wire breakage caused by vibration and improving the reliability and strength of the electrical connection between the first electrical connecting member 41 and the electrode layer of the first polarity structure 232.

[0178] In some optional embodiments, as shown in Figure 15 The outer periphery of the diaphragm 231 can be connected with a support 6, and the first electrical connecting member 41 can be electrically connected with the support 6, and the support 6 is electrically connected with the diaphragm 231, so as to form a passage.

[0179] In one embodiment, similar to the second electrical connecting member 42, one end of the first electrical connecting member 41 can be exposed from the surface of the shell 1, so as to facilitate the connection with an external power supply.

[0180] In some optional embodiments, the shape of the first electrical connecting member 41 can be set according to requirements, for example, the first electrical connecting member 41 in the embodiment is in a Z shape. One end of the first electrical connecting member 41 is flush with the surface of the shell 1, so that the setting of the first electrical connecting member 41 does not additionally increase the size of the sound production device and does not affect the miniaturization of the sound production device.

[0181] Optionally, the first electrical connecting member 41 can be a one-piece structure or a split structure, and the embodiment does not limit this. When the first electrical connecting member 41 is a split structure, a part of the first electrical connecting member 41 can be a one-piece structure with the corresponding support 6, and the embodiment does not limit this.

[0182] In at least one embodiment, as shown in Figure 15 The shell 1 can be provided with a support seat 17, and the support seat 17 can be arranged on one side of the support assembly 22. The first electrical connecting member 41 is arranged in the support seat 17, so as to reduce the risk of movement of the first electrical connecting member 41 relative to the shell 1 and improve the reliability and stability of the connection between the first electrical connecting member 41, the first polarity structure 232 and the external power supply. For example, at least a part of the first electrical connecting member 41 can be embedded in the support seat 17. The shell 1 can be provided with a hole for the first electrical connecting member 41 to pass through, so as to assist in limiting the first electrical connecting member 41. Optionally, the support assembly 22 can also be provided with a hole for the first electrical connecting member 41 to pass through, so as to facilitate the electrical connection between the first electrical connecting member 41 and the electrode layer of the first polarity structure 232.

[0183] The specific structures of the front sound cavity 31 and the rear cavity 32 in the embodiment can be referred to Figures 1 to 7The specific structures of the front acoustic cavity 31 and the rear acoustic cavity 32 in the sound-generating device shown will not be described in detail in this embodiment.

[0184] For example, such as Figures 19 to 22 As shown, the sound-generating device has multiple diaphragms 231, first polar structures 232, and second polar structures 241. The first polar structure 232 includes an electrode layer, and the second polar structure 241 includes an electret layer. Each first polar structure 232 has second polar structures 241 on both sides in the first direction X. A constant electric field is formed between two adjacent second polar structures 241 to drive the first polar structure 232 located between the two second polar structures 241 to vibrate, thereby causing the diaphragm 231 connected to the first polar structure 232 to vibrate.

[0185] In some optional embodiments, when the first polarity structure 232 includes an electrode layer and the second polarity structure 241 includes an electret layer, and multiple first polarity structures 232 and second polarity structures 241 are provided, the electrode layers of two adjacent first polarity structures 232 in the first direction X are connected to the same electrode of an external power source. That is, the charge type in the electrode layers of all first polarity structures 232 is the same, for example, all are positive charges or all are negative charges. Furthermore, the electret layers of two adjacent second polarity structures 241 in the first direction X have opposite charges, that is, the charges in the electret layers of two adjacent second polarity structures 241 have opposite charges. This configuration ensures that the vibration directions of two adjacent first polar structures 232 are opposite, which in turn makes the movement directions of two adjacent diaphragms 231 opposite. That is, the two adjacent diaphragms 231 move towards each other or away from each other at the same time, thereby enabling the two adjacent diaphragms 231 to simultaneously push or pull the air between them, thus enhancing the acoustic performance (amplitude, frequency, etc.).

[0186] In this embodiment, the formation method and specific structure of the front acoustic cavity 31 and the rear cavity 32 can be referred to Figures 8 to 13 The formation method and specific structure of the front acoustic cavity 31 and the rear cavity 32 in the sound-generating device shown will not be described in detail in this embodiment.

[0187] In this embodiment, the first polar structures 232 are all located within the through holes 221 of the support component 22. Therefore, compared to Figures 14 to 18 The sound-generating device shown requires multiple first electrical connectors 41 to facilitate the electrical connection of the electrode layer of each first polarity structure 232 to an external power source. That is, in this embodiment, multiple first polarity structures 232 are correspondingly provided with multiple first electrical connectors 41. One end of each first electrical connector 41 is electrically connected to an external power source, and the other end of each first electrical connector 41 is electrically connected to the electrode layer of the corresponding first polarity structure 232.

[0188] Exemplarily, when the diaphragm 231 is provided with a conductive structure and / or the diaphragm 231 is a conductive body, the first electric connecting member 41 is electrically connected with the diaphragm 231 connected with the corresponding first polarity structure 232.

[0189] In at least one implementation, the outer periphery of each diaphragm 231 can be connected with a support member 6, and at this time, the first electric connecting member 41 is fixedly and electrically connected with the support member 6. In the embodiment, the first electric connecting member 41 can be of an integrated structure or a split structure, which is not limited in the embodiment. When the first electric connecting member 41 is of a split structure, a part of the first electric connecting member 41 can be of an integrated structure with the corresponding support member 6, which is not limited in the embodiment.

[0190] Optionally, the first electric connecting member 41 can be a conductive structure such as a solder pad.

[0191] In one embodiment, the ends of the plurality of first electric connecting members 41 away from the first polarity structure 232 can be connected into one body, which facilitates the assembly of the first electric connecting member 41, and as shown, the part of the first electric connecting member 41 exposed on the surface of the shell 1 forms a contact part on the surface of the shell 1, thereby making it unnecessary to connect the external power source one by one, improving the connection efficiency of the sound generating device in the electronic equipment, and also being able to ensure the consistency of the alternating current passing into the electrode layer of each first polarity structure 232. Figure 19

[0192] In at least one implementation, as shown in the drawings, a support seat 17 can be arranged in the shell 1, and the support seat 17 is arranged on one side of the support assembly 22. The plurality of first electric connecting members 41 are arranged in the support seat 17, so as to reduce the risk of movement of the first electric connecting member 41 relative to the shell 1, and improve the reliability and stability of the connection of the first electric connecting member 41 to the electrode layer of the first polarity structure 232 and the external power source. Exemplarily, at least a part of the first electric connecting member 41 can be embedded in the support seat 17. The shell 1 can be provided with a hole for the first electric connecting member 41 to pass through, so as to be able to assist in limiting the first electric connecting member 41. Optionally, the support assembly 22 can also be provided with a hole for the first electric connecting member 41 to pass through, so as to facilitate the electrical connection of the first electric connecting member 41 with the first polarity structure 232. Figure 20 In one embodiment, when the diaphragm 231 is provided with a plurality of diaphragms, the support assembly 22 can include a plurality of support structures 222, and the plurality of support structures 222 are connected in sequence along the first direction X. The adjacent two support structures 222 are arranged to sandwich and fix the diaphragm 231. Each second polarity structure 241 is connected to one of the support structures 222.

[0193]

[0194] ​​The embodiment also provides an electronic device, and the electronic device comprises the sound production device.

[0195] The electronic device provided by the embodiment can have a longer service life and higher flexibility. In addition, the electronic device can also have higher low-frequency sensitivity, and the sound production unit occupies a smaller space, which is beneficial to the thinning of the electronic device and makes the space arrangement more flexible.

[0196] Exemplarily, the electronic device in the embodiment can be a folding mobile phone, an ultra-thin television, a computer, a smart wearable device, etc., and the embodiment is not limited thereto.

[0197] Note 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. Sound production device, characterized in that The application relates to a sound emitting device, comprising: a shell provided with a first sound outlet, and two shell walls of the shell in a first direction are provided with assembling holes; a sound emitting unit provided with a second sound outlet communicated with the first sound outlet; the sound emitting unit comprises a supporting assembly, a vibrating assembly and an actuating assembly, two ends of the supporting assembly in the first direction are correspondingly installed in the assembling holes, the vibrating assembly and the actuating assembly are arranged on the supporting assembly, and the actuating assembly provides electric field force for driving the vibrating assembly to vibrate in the first direction.

2. The sound production device of claim 1, wherein, The vibrating assembly comprises at least one vibrating diaphragm and at least one first polarity structure, and the actuating assembly comprises at least two second polarity structures; an inner periphery of the vibrating diaphragm is correspondingly connected to the first polarity structure, and an outer periphery of the vibrating diaphragm is connected to the supporting assembly; the second polarity structures are connected to the supporting assembly, the first polarity structures and the second polarity structures are alternately arranged along the first direction, and each first polarity structure is provided with the second polarity structures on both sides in the first direction; when one of the first polarity structure and the second polarity structure comprises an electrode layer, the other one comprises an electret layer.

3. The sound production device of claim 2, wherein, a front sound cavity is formed between the vibrating diaphragm, the first polarity structure, the second polarity structure on one side of the vibrating diaphragm and the supporting assembly, and the front sound cavity is communicated with the second sound outlet; a rear cavity is formed between the vibrating diaphragm, the first polarity structure, the second polarity structure on the other side of the vibrating diaphragm and the supporting assembly.

4. The sound production device of claim 2, wherein, The vibrating diaphragm is a conductor; and / or, a conductive structure is arranged on the vibrating diaphragm.

5. The sound production device of claim 4, wherein, The vibrating diaphragm is electrically connected to the first polarity structure.

6. The sound production device of claim 2, wherein, The sound emitting device further comprises a first electric connecting element, the first polarity structure comprises an electrode layer, the first electric connecting element is correspondingly arranged with the first polarity structure, one end of the first electric connecting element is electrically connected to an external power supply, and the other end of the first electric connecting element is electrically connected to the electrode layer of the corresponding first polarity structure.

7. The sound production device of claim 2, wherein, The supporting assembly is provided with a through hole along the first direction, the vibrating assembly and the actuating assembly are arranged in the through hole, in the first direction, a plurality of the second polarity structures comprise two outer second polarity structures, the two outer second polarity structures are correspondingly arranged in two hole openings of the through hole and exposed to the shell through the assembling holes.

8. The sound production device of claim 7, wherein, The sound emitting device further comprises a second electric connecting element, the second polarity structure comprises an electrode layer, the second electric connecting element is correspondingly arranged with the inner second polarity structure between the two outer second polarity structures, one end of the second electric connecting element is electrically connected to an external power supply, and the other end of the second electric connecting element is electrically connected to the electrode layer of the corresponding inner second polarity structure.

9. The sound production device of claim 6 or 8, wherein, The shell is provided with a supporting seat; The first electric connecting element is arranged in the supporting seat; or the second electric connecting element is arranged in the supporting seat.

10. The sound production device of claim 2, wherein, The vibrating diaphragm is arranged in a convex mode along the first direction.

11. The sound production device of claim 1, wherein, The sound production device further comprises an insulating member connected to the shell, the insulating member covering the assembly hole one by one.

12. The sound production device of claim 11, wherein, The insulating member is provided with a notch, at least part of the actuating assembly is exposed by the notch to form an electrical connection part.

13. The sound production device of claim 1, wherein, The support assembly is of split structure and comprises a plurality of support structures, the support structures are connected in sequence along the first direction, two support structures on both sides in the first direction are correspondingly mounted on the assembly hole. The vibration assembly is clamped between two adjacent support structures. The actuating assembly is connected to the support structure.

14. The sound production device of claim 2, wherein, The first polarity structure comprises the electrode layer, and the second polarity structure comprises an electret layer. When the first polarity structure is provided with a plurality of, the electrode layers of two adjacent first polarity structures in the first direction are connected to the same electrode of an external power supply. The electret layers of two adjacent second polarity structures in the first direction are opposite in electrical property.

15. The sound production device of claim 2, wherein, The first polarity structure comprises the electret layer, and the second polarity structure comprises an electrode layer. The electrode layers of two adjacent second polarity structures in the first direction are connected to opposite electrodes of an external power supply. When the first polarity structure is provided with a plurality of, the electret layers of two adjacent first polarity structures in the first direction are the same in electrical property.

16. The sound production device of claim 3, wherein, The shell is provided with a residual cavity, the rear cavity is provided with a communication hole corresponding to the support assembly, and the rear cavity communicates with the residual cavity through the communication hole.

17. An electronic device, characterized by The sound production device comprises any one of claims 1-16.

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