Sound production device and earphone

Abstract

The invention discloses a sound production device and an earphone, the sound production device comprises a first shell, a sound production module and a separator, the first shell is provided with an accommodating cavity, a sound outlet hole and a pressure relief hole, the sound production module is arranged in the accommodating cavity, the sound production module comprises two sound production units and a sound production support, the vibrating diaphragms of the two sound production units are oppositely arranged on the sound production support at intervals, a front sound cavity is formed in the space between the vibrating diaphragms of the two sound production units, and the separator is located between the first shell and the sound production support so that two independent rear sound cavities can be formed between the first shell and the sound production support. And each rear sound cavity correspondingly covers one side, deviating from the front sound cavity, of the vibrating diaphragm of the corresponding sound production unit, and the two rear sound cavities are respectively communicated with the corresponding pressure relief holes. According to the invention, the separator is arranged between the first housing and the sounding support to form the independent rear sound cavities in one-to-one correspondence with the sounding units, thereby achieving the precise adjustment and control of the back pressure, avoiding the sound wave interference, and improving the sound quality stability and fidelity.

Description

Technical Field

[0001] This application relates to the field of acoustic equipment technology, and more specifically, to a sound-generating device and headphones. Background Technology

[0002] With the development of consumer electronics technology, headphones, as the mainstream audio output device, have made sound quality one of the core needs of users.

[0003] A prior art disclosure discloses an earphone with a dual-speaker structure. The earphone's sound-generating part includes a first housing and a sound-generating assembly disposed within the first housing. The sound-generating assembly includes two speakers assembled and mated along an axial direction, each speaker having a diaphragm. A first acoustic cavity is formed between the two speakers, and a second acoustic cavity, isolated from the first acoustic cavity, is formed between the sound-generating assembly and the first housing. During operation, the sound generated on the side of the two speaker diaphragms facing the first acoustic cavity is output to the user's ear canal through the first acoustic cavity and a sound outlet, while the sound generated on the side of the diaphragms facing away from the first acoustic cavity is released outward through the second acoustic cavity and a pressure relief hole to achieve air pressure balance.

[0004] However, the aforementioned existing technology has significant drawbacks: the second acoustic cavity is a connected, monolithic cavity, and the sound waves generated by the back sides of the diaphragms of the two speakers (the sides facing the second acoustic cavity) will superimpose and reflect each other within the shared second acoustic cavity, forming interference sound waves. On the one hand, the interference sound waves will exert additional pressure on the diaphragm of the other speaker, disrupting the stability and linearity of the diaphragm vibration, resulting in muddy low-frequency sound and distortion in mid- and high-frequency sounds. Therefore, how to solve the problem of mutual interference between the second acoustic cavities in dual-speaker headphones has become a critical technical challenge that urgently needs to be addressed in this field.

[0005] Therefore, existing technologies need to be improved. Summary of the Invention

[0006] The purpose of this application is to provide a sound-generating device and headphones, which aims to solve the technical problem of mutual interference of sound waves on the back side of the diaphragm caused by the shared acoustic cavity of dual-speaker headphones in the prior art.

[0007] To achieve the above objectives, the technical solution adopted in this application is as follows: This application provides a sound-generating device, comprising: A first housing, the first housing having a receiving cavity, a sound outlet and a pressure relief hole; A sound-generating module is disposed within the accommodating cavity. The sound-generating module includes two sound-generating units and a sound-generating support. The diaphragms of the two sound-generating units are disposed on the sound-generating support with a relative interval. The space between the diaphragms of the two sound-generating units forms a front sound cavity, which is connected to the sound outlet. A separator is located between the first housing and the sound-generating bracket to form two independent rear acoustic cavities between the first housing and the sound-generating bracket. The two rear acoustic cavities correspond one-to-one with the two sound-generating units, and each rear acoustic cavity covers the side of the diaphragm of the corresponding sound-generating unit that faces away from the front acoustic cavity. The two rear acoustic cavities are respectively connected to the corresponding pressure relief holes.

[0008] In one embodiment, the separator extends from the sound-generating bracket along the assembly axis of the sound-generating unit, with one end of the separator abutting against the inner wall of the first housing and the other end of the separator extending to the outer wall of the sound-generating bracket.

[0009] In one embodiment, the separator includes an elastic structure, the inner sidewall of which is fitted and connected to the outer peripheral wall of the sound-generating bracket, and the outer sidewall of which abuts against the inner wall of the first outer shell.

[0010] In one embodiment, the elastic structure is either an EVA elastic structure or a silicone elastic structure.

[0011] In one embodiment, an adhesive layer is provided between the separator and the sound-generating bracket, and the separator is fixedly connected to the sound-generating bracket through the adhesive layer.

[0012] In one embodiment, the sound-generating support includes: The bracket body has two mounting portions arranged opposite to each other. The two mounting portions are used to assemble two sound generating units along the axial direction, so that the diaphragms of the two sound generating units are arranged relatively spaced apart, and the space between the diaphragms of the two sound generating units forms the front sound cavity. A bracket flange extends outward from the sound-generating bracket to form an integral structure, and the bracket flange abuts against the inner wall of the first outer shell through the separator; A sound hole protrusion extends outward from the support body, and an acoustic communication cavity is formed on the sound hole protrusion, which is connected to the front sound cavity; The separator includes a first isolation portion and a second isolation portion. The first isolation portion is connected to the second isolation portion. The first isolation portion is used to fit and connect with the bracket body and extend to the bracket flange. The second isolation portion is used to fit and connect with the acoustic hole boss.

[0013] In one embodiment, the first housing is provided with a slot, and the first housing is connected to the bracket flange through the slot so that the bracket flange is embedded in the slot.

[0014] In one embodiment, the support flange includes: A flange body, the flange body extending from the support body along the assembly axis of the sound-generating unit; An inlet portion is symmetrically disposed on the side of the flange body away from the acoustic communication cavity; The first tangent edge is provided along the tangent direction of the flange body, and the first tangent edge extends from the side of the bracket body away from the acoustic communication cavity to the inlet portion; The second tangent edge is located on the side of the flange body away from the first tangent edge, and the second tangent edge extends from the side of the bracket body away from the acoustic communication cavity to the inlet portion.

[0015] In one embodiment, each of the rear acoustic cavities is provided with an acoustic damping element, which covers the inner port of the corresponding pressure relief hole. The acoustic damping element is at least one of polyester cotton, metal filter, or porous ceramic.

[0016] To achieve the above objectives, this application also provides an earphone, which includes the sound-generating device described in the above embodiment. Therefore, this earphone possesses all the technical features and beneficial effects of the aforementioned sound-generating device, which will not be elaborated further.

[0017] The beneficial effects of the sound-generating device and headphones provided in this application are at least as follows: This application discloses a sound-generating device and headphones. The sound-generating device includes a first housing, a sound-generating module, and a separator. The first housing has a receiving cavity, a sound outlet, and a pressure relief hole. The sound-generating module is disposed in the receiving cavity and includes two sound-generating units and a sound-generating support. The diaphragms of the two sound-generating units are disposed on the sound-generating support with a relative interval. The space between the diaphragms of the two sound-generating units forms a front sound cavity, which communicates with the sound outlet. The separator is located between the first housing and the sound-generating support to form two independent rear sound cavities between the first housing and the sound-generating support. The two rear sound cavities correspond one-to-one with the two sound-generating units, and each rear sound cavity covers the side of the diaphragm of the corresponding sound-generating unit that faces away from the front sound cavity. The two rear sound cavities are respectively communicated with the corresponding pressure relief holes. This application establishes a partition between the first outer shell and the sound-emitting bracket to form an independent rear acoustic cavity corresponding to each sound-emitting unit, thereby achieving precise control of back pressure, avoiding sound wave interference, and improving sound quality stability and fidelity. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the disassembled structure of the sound-generating device provided in the embodiments of this application; Figure 2 This is a schematic cross-sectional view of the sound-generating device provided in an embodiment of this application. Figure 3 This is another cross-sectional structural schematic diagram of the sound-generating device provided in the embodiments of this application; Figure 4 This is a schematic diagram of the structure of the sound-generating bracket provided in an embodiment of this application; Figure 5 A schematic diagram of a specific embodiment of the sound-generating bracket provided in this application; Figure 6 This is a schematic diagram of the structure of the sound-generating module provided in the embodiments of this application; Figure 7 A schematic diagram of the installation structure of the sound-generating unit provided in an embodiment of this application; Figure 8 A schematic diagram of the structure of the first housing provided in an embodiment of this application; Figure 9 A schematic diagram of the assembly structure of the first housing and the elastic lug provided in an embodiment of this application; Figure 10 This is a schematic diagram of the structure of the earphone provided in an embodiment of this application; Figure 11 This is a structural schematic diagram of the headphones provided in an embodiment of this application from another perspective.

[0020] The following are the labeling elements in the figure: 100, Sound-generating bracket; 100a, Sound-generating module; 200, Sound-generating unit; 300, First outer shell; 400, Elastic ear loop; 500, Abutment part; 600, Separator; 110, Bracket body; 120, Acoustic communication cavity; 130, Bracket flange; 140, Sound hole boss; 150, Mounting part; 160, Embedded groove; 131, Flange body; 132, Inlet part; 133, First tangential edge; 134, Second tangential edge; 135 151. Avoidance groove; 152. Support platform; 153. Limiting ring; 210. Diaphragm; 220. Voice coil; 230. Magnetic circuit system; 240. Basket; 250. Front acoustic cavity; 310. First housing; 320. Second housing; 330. Receiving cavity; 311. Slot; 312. Connecting part; 313. Sound outlet; 314. Pressure relief hole; 315. Pressure relief connection hole; 331. Rear acoustic cavity; 610. First isolation part; 620. Second isolation part. Detailed Implementation

[0021] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0022] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it may be directly or indirectly located on that other component. When a component is referred to as "connected to" another component, it may be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate orientations or positions based on the accompanying drawings, and are for ease of description only, and should not be construed as limiting the technical solution. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. "A plurality" means two or more, unless otherwise explicitly defined.

[0023] To facilitate understanding of the embodiments of the present invention, several elements that will be introduced in the description of the embodiments of this application will be introduced first.

[0024] An ear-clip earphone includes a sound-generating module, an ear hook, and a retaining part. The sound-generating module is connected to the retaining part via the ear hook. The sound-generating module is inserted into the user's concha, and the retaining part is used to abut against the back of the user's ear. The ear hook can wrap around the user's helix, and the sound-generating module and the retaining part form a clamping state on both sides of the user's helix. The sound-generating module is a sound playback device used to convert electrical signals into sound signals and play them to the wearer. The retaining part and the sound-generating module form a clamping state so that the entire earphone is clamped and worn on the user's helix. In some embodiments, the retaining part may contain components such as a battery or circuit board. Of course, the retaining part may also not contain a battery, and the battery may be installed in the sound-generating module instead.

[0025] Dual-sound headphones refer to headphones whose sound module uses two sound units arranged relatively apart, so that the space between the diaphragms of the two sound units forms a front acoustic cavity. The sound generated by the diaphragms of the two sound units is output through the front acoustic cavity, which effectively improves the sound pressure level of the sound module, thereby achieving better volume effect, allowing users to hear clearer sound, and effectively improving the sound quality of the headphones. Example

[0026] Please see Figure 1 This embodiment provides a sound-generating device, which includes a first housing 300, a sound-generating module 100a, and a separator 600. Please refer to... Figure 2 The first outer casing 300 has a receiving cavity 330, a sound outlet 313, and a pressure relief hole 314. The sound-emitting module 100a is disposed in the receiving cavity 330. Figure 6 The sound source (as shown) includes two sound-generating units 200 and a sound-generating bracket 100. The diaphragms 210 of the two sound-generating units 200 are disposed at a relative interval on the sound-generating bracket 100. Figure 7 As shown in the diagram, the space between the diaphragms 210 of the two sound-generating units 200 forms a front acoustic cavity 250, which communicates with the sound outlet 313. (See also...) Figure 3 The separator 600 is located between the first housing 300 and the sound-emitting bracket 100 to form two independent rear acoustic cavities between the first housing 300 and the sound-emitting bracket 100. The two rear acoustic cavities correspond one-to-one with the two sound-emitting units 200, and each rear acoustic cavity covers the side of the diaphragm 210 of the corresponding sound-emitting unit 200 away from the front acoustic cavity 250. The two rear acoustic cavities are respectively connected to the corresponding pressure relief holes 314.

[0027] In this embodiment, the first outer shell 300 has a receiving cavity 330, a sound outlet 313, and a pressure relief hole 314. The receiving cavity 330 provides installation space, the sound outlet 313 is used to discharge sound, and the pressure relief hole 314 is used to balance the air pressure in the rear acoustic cavity. The sound module includes two sound generating units 200 and a sound generating bracket 100. The diaphragms 210 of the two sound generating units 200 are disposed relatively apart on the sound generating bracket 100. The space between the diaphragms 210 of the two sound generating units 200 forms a front acoustic cavity 250, which is connected to the sound outlet 313 to ensure that the useful sound waves generated by the sound generating units 200 are efficiently discharged. The separator 600 is located between the first housing 300 and the sound-generating bracket 100 to form two independent rear acoustic cavities between the first housing 300 and the sound-generating bracket 100. The two rear acoustic cavities are respectively connected to the corresponding pressure relief holes 314, so that the back pressure of a single sound-generating unit 200 can be independently adjusted. This allows the diaphragm 210 of each sound-generating unit 200 to have its own dedicated acoustic space on the back side, avoiding the superposition interference of back side sound waves in the shared cavity in the prior art. This ensures that the vibration of the diaphragm 210 is only regulated by the air pressure of its own rear acoustic cavity, significantly improving the vibration linearity and reducing problems such as low-frequency muddiness and mid-to-high-frequency distortion.

[0028] Therefore, this application forms an independent rear acoustic cavity corresponding to the sound-emitting unit 200 by setting a separator 600 between the first outer shell 300 and the sound-emitting bracket 100, thereby achieving precise control of back pressure, avoiding sound wave interference, and improving sound quality stability and fidelity.

[0029] Specifically, please refer to Figure 3 The separator 600 extends from the sound-emitting bracket 100 along the assembly axis of the sound-emitting unit 200. One end of the separator 600 abuts against the inner wall of the first housing 300 to form a sealed boundary. The other end of the separator 600 extends to the outer wall of the sound-emitting bracket 100 to ensure the independent sealing of the rear sound cavity and avoid sound wave crosstalk between the two rear sound cavities.

[0030] Specifically, please refer to Figure 1 The separator 600 includes an elastic structure. The inner sidewall of the elastic structure is fitted and connected to the outer peripheral wall of the sound-generating module 100a, and the outer sidewall of the elastic structure abuts against the inner wall of the first outer shell 300. The elastic structure can adapt to the assembly error between the sound-generating bracket 100 and the first outer shell 300, improve the fit and sealing, and absorb the stress during the assembly process to avoid damage to the components.

[0031] Optionally, the elastic structure is either an EVA elastic structure or a silicone elastic structure.

[0032] For example, the elastic structure can be an EVA elastic structure, that is, the elastic structure is made of EVA material. EVA elastic structures have good elasticity and acoustic sealing properties. EVA material has low cost and excellent damping characteristics.

[0033] For example, the elastic structure can be a silicone elastic structure, which is made of silicone material. Silicone elastic structures have good elasticity and acoustic sealing properties, strong aging resistance, and more stable sealing effect, making them suitable for high-end headphone applications.

[0034] Specifically, please combine Figure 1 An adhesive layer is provided between the separator 600 and the sound-generating bracket 100, and the separator 600 is fixedly connected to the sound-generating bracket 100 through the adhesive layer. For example, the adhesive layer can be made of acrylic adhesive, which has high bonding strength and good temperature resistance, ensuring the connection stability between the separator 600 and the sound-generating bracket 100 and preventing the separator 600 from shifting due to vibration during use. At the same time, the separator 600 can also be fixedly connected to the first outer shell 300 by the adhesive layer, ensuring the connection stability between the separator 600 and the first outer shell 300.

[0035] Specifically, please combine Figure 1 The surface of the sound-generating bracket 100 is provided with an embedding groove 160, and the separator 600 is bonded to the embedding groove 160 by an adhesive layer, thereby achieving a fixed connection between the separator 600 and the sound-generating bracket 100.

[0036] Specifically, please combine Figure 4 The sound-generating bracket 100 includes: a bracket body 110, a bracket flange 130, and a sound hole boss 140. The bracket body 110 has two mounting portions 150 arranged opposite to each other. The two mounting portions 150 are used to assemble two sound-generating units 200 along the axial direction, so that the diaphragms 210 of the two sound-generating units 200 are arranged relatively spaced apart. The space between the diaphragms 210 of the two sound-generating units 200 forms a front sound cavity 250. The bracket flange 130 extends outward from the sound-generating bracket 100 to form an integral structure. The bracket flange 130 abuts against the inner wall of the first outer shell 300 through a separator 600. The sound hole boss 140 extends outward from the bracket body 110. An acoustic communication cavity 120 is opened on the sound hole boss 140, and the acoustic communication cavity 120 communicates with the front sound cavity 250.

[0037] In this embodiment, two mounting portions 150 are used to assemble two sound-generating units 200 along the axial direction, so that the diaphragms 210 of the two sound-generating units 200 are relatively spaced apart, ensuring the volume stability of the front acoustic cavity 250. The bracket flange 130 and the separator 600 abut against the inner wall of the first housing 300, improving the assembly stability of the sound-generating bracket 100 and the first housing 300. An acoustic communication cavity 120 is provided on the sound hole boss 140, which communicates with the front acoustic cavity 250 to extend the sound wave transmission path and optimize acoustic performance. The sound hole boss 140 can extend the acoustic channel, which facilitates precise docking with the sound output structure of the first housing 300, while enhancing the structural strength of the acoustic communication cavity 120 and avoiding vibration interference during sound wave transmission.

[0038] Please see Figure 1 The separator 600 includes a first isolation part and a second isolation part. The first isolation part is connected to the second isolation part. The first isolation part is used to fit and connect with the bracket body 110 and extends to the bracket flange 130. The second isolation part is used to fit and connect with the sound hole boss 140.

[0039] In this embodiment, the first isolation part is used to fit and connect with the support body 110 and extend to the support flange 130, and the second isolation part is used to fit and connect with the sound hole boss 140, so as to achieve all-round sealing and isolation of the outer periphery of the sound-generating support 100 and ensure the independence of the rear sound cavity. For example, the first isolation part can be an EVA strip, that is, an EVA strip is fitted and connected to the support body 110 and extends to the support flange 130, and the second isolation part can be an EVA strip or an EVA ring, that is, an EVA strip or an EVA ring is fitted and connected to the side wall of the sound hole boss 140.

[0040] For example, please see Figure 5 Both the bracket body 110 and the sound hole boss 140 have embedded grooves 160 on their outer walls. The first isolation part is connected to the embedded groove 160 on the bracket body 110, that is, the first isolation part is partially embedded in the embedded groove 160 on the bracket body 110. The second isolation part is connected to the embedded groove 160 on the sound hole boss 140, that is, the second isolation part is partially embedded in the embedded groove 160 on the sound hole boss 140, so as to realize the quick installation of the separator 600, improve the assembly efficiency, and realize the stable connection between the separator 600 and the sound-emitting bracket 100.

[0041] Specifically, please refer to Figure 8The first outer shell 300 is provided with a slot 311, and the first outer shell 300 is connected to the bracket flange 130 through the slot 311 so that the bracket flange 130 is embedded in the slot 311. The cooperation between the slot 311 and the bracket flange 130 enables the rapid positioning and assembly of the sound-generating bracket 100, while improving the impact resistance of the sound-generating module 100a in the accommodating cavity 330. For example, when assembling the sound-generating device, firstly, the two sound-generating units 200 are respectively assembled with the two mounting portions 150 of the sound-generating bracket 100, that is, the two sound-generating units 200 are fixed on the sound-generating bracket 100. Then, the separator 600 is adhered to the sound-generating bracket 100, so that the first isolation portion is adhered to the bracket body 110 and the second isolation portion is adhered to the side wall of the sound hole boss 140. Then, the sound-generating bracket 100 is installed in the first housing 310 of the first housing 300, wherein the sound-generating bracket 100 is inserted into the slot 311 of the first housing 310 through the bracket flange 130. Figure 5 As shown in the figure, the sound-generating bracket 100 and the first housing 310 can be quickly assembled and stably fixed, improving the installation accuracy and connection reliability of the sound-generating device and preventing loosening during use. Then, the second housing 320 can be assembled so that the second housing 320 is connected to the first housing 310. Adhesive can be used to achieve a fixed connection between the separator 600 and the first housing 300 to complete the assembly of the sound-generating device.

[0042] Specifically, please refer to Figure 1 The first outer shell 300 includes a first shell 310 and a second shell 320. The first shell 310 and the second shell 320 are separable and connected to form a receiving cavity 330, and a slot 311 is provided on the inner wall of the first shell 310.

[0043] In this embodiment, the first housing 310 and the second housing 320 can be detachably connected by a snap-fit ​​or threaded structure to jointly enclose and form an accommodating cavity 330. A slot 311 is integrally formed on the inner wall of the first housing 310 to ensure the connection strength between the slot 311 and the first housing 310. The first housing 310 achieves quick assembly and stable fixation with the support flange 130 on the sound-emitting bracket 100 through the slot 311. For example, please refer to... Figure 9 The inner wall of the first housing 310 is provided with a connecting part 312 for installing the elastic ear hook. Two slots 311 are respectively provided on both sides of the connecting part 312. Correspondingly, the flange body 131 is provided with a relief groove 135 that cooperates with the connecting part 312. The connection between the elastic ear hook and the connecting part 312 of the first housing 310 can be understood as prior art and will not be described in detail.

[0044] Specifically, please refer to Figure 4The support flange 130 includes: a flange body 131, an inlet portion 132, a first tangent edge 133, and a second tangent edge 134. The flange body 131 extends from the support body 110 along the assembly axis of the sound-generating unit 200. The inlet portion 132 is symmetrically disposed on the side of the flange body 131 away from the acoustic communication cavity 120. The first tangent edge 133 is disposed along the tangent direction of the flange body 131 and extends from the side of the support body 110 away from the acoustic communication cavity 120 to the inlet portion 132. The second tangent edge 134 is located on the side of the flange body 131 away from the first tangent edge 133 and extends from the side of the support body 110 away from the acoustic communication cavity 120 to the inlet portion 132.

[0045] In this embodiment, the guide portion 132 is symmetrically disposed on the side of the flange body 131 away from the acoustic communication cavity 120, and is used to guide the bracket flange 130 to quickly insert into the mating structure of the first housing 300, thereby improving assembly efficiency. When the sound-emitting bracket 100 is assembled with the first housing 310, the sound-emitting bracket 100 is inserted into the slot 311 of the first housing 310 through the bracket flange 130. The guide portion 132 plays a guiding role, making it easier for the bracket flange 130 to align with the slot 311, reducing assembly difficulties or failures caused by alignment deviations, and improving assembly efficiency. Since the guide portion 132 can guide the bracket flange 130 to quickly and accurately insert into the slot 311, it can significantly improve assembly efficiency and reduce production costs. For example, the guide portion 132 can be configured as an arc-shaped connecting portion 312, used to guide the bracket flange 130 to quickly insert into the mating structure of the first housing 300, improving assembly efficiency. Furthermore, the arc-shaped structure can reduce guiding resistance during assembly and avoid stress concentration during assembly, protecting the bracket and housing structures. The first tangent edge 133 and the second tangent edge 134 cooperate to make the bracket flange 130 and the slot 311 of the first housing 300 form a surface contact, which improves the tightness of the fit and reduces the amount of material used in the flange body 131, thus achieving a lightweight design.

[0046] The mounting part 150 includes a support platform 151 and a limiting ring 152. The support platform 151 is disposed on the bracket body 110 and is used to connect with the sound-generating unit 200. The limiting ring 152 extends upward from the support platform 151 and is used to embed into the sound-generating unit 200 to limit the sound-generating unit 200.

[0047] In this embodiment, the support platform 151 is used to fit and connect with the frame 240 of the sound-generating unit 200, providing a stable support base. The limiting ring 152 is used to embed into the frame 240 of the sound-generating unit 200 to radially limit the sound-generating unit 200.

[0048] Specifically, please refer to Figure 7The sound-generating unit 200 includes: a diaphragm 210, a voice coil 220, a magnetic circuit system 230, and a frame 240. The voice coil 220 is connected to the diaphragm 210 and is used to drive the diaphragm 210 to reciprocate. The magnetic circuit system 230 is connected to the voice coil 220 and is used to drive the voice coil 220 to reciprocate. The frame 240 is used to mount the diaphragm 210 and the magnetic circuit system 230. The frame 240 is mounted on the support body 110 through the mounting part 150.

[0049] In this embodiment, the frames 240 of the two sound-generating units 200 are respectively connected to the two mounting parts 150 of the sound-generating bracket 100, so that the space between the diaphragm 210 of the two sound-generating units 200 and the sound-generating bracket 100 forms a front acoustic cavity 250. The magnetic circuit system 230 is used to provide a magnetic field to drive the voice coil 220 to reciprocate. The voice coil 220 is connected to the diaphragm 210. Under the action of the magnetic field, the voice coil 220 drives the diaphragm 210 to vibrate to generate sound waves.

[0050] Specifically, please refer to Figure 6 Each of the two sound-generating units 200 has a pressure relief connection hole on its frame 240. These holes connect the frame 240 to the rear acoustic cavity. Each rear acoustic cavity contains an acoustic damping element that covers the inner port of the corresponding pressure relief hole 314. The acoustic damping element absorbs high-frequency noise in the rear acoustic cavity, slows down the rate of air pressure change, prevents airflow noise during pressure relief, and prevents foreign objects from entering the rear acoustic cavity through the pressure relief hole 314.

[0051] Optionally, the acoustic damping element is at least one of polyester cotton, metal filter, or porous ceramic.

[0052] For example, the acoustic damping component can be a metal filter, that is, a metal filter is installed on the pressure relief hole 314 to absorb high-frequency noise in the rear acoustic cavity, slow down the rate of air pressure change, avoid airflow noise during the pressure relief process, and prevent foreign objects from entering the rear acoustic cavity through the pressure relief hole 314.

[0053] For example, the acoustic damping component can be a metal filter and polyester cotton. That is, a metal filter is installed on the pressure relief hole 314, and a layer of polyester cotton is laid on the side of the metal filter near the rear acoustic cavity to absorb high-frequency noise in the rear acoustic cavity, slow down the rate of air pressure change, avoid airflow noise during the pressure relief process, and prevent foreign objects from entering the rear acoustic cavity through the pressure relief hole 314.

[0054] For example, the acoustic damping element can be porous ceramic, or it can be a combination of porous ceramic and polyester cotton, to absorb high-frequency noise in the rear acoustic cavity, slow down the rate of air pressure change, avoid airflow noise during the pressure relief process, and prevent foreign objects from entering the rear acoustic cavity through the pressure relief hole 314. Example

[0055] Please see Figure 10 Based on the sound-generating device in the above embodiments, this application also provides an earphone, wherein the earphone includes the sound-generating device as described in the above embodiments. This earphone, through its independent rear acoustic cavity design, effectively solves the mutual interference problem of the dual sound-generating units 200, thereby improving sound quality performance.

[0056] Specifically, please refer to Figure 11 In some embodiments, the earphone further includes: an elastic ear hook and a contact portion 500. The elastic ear hook is connected to the sound-generating module 100a, and the contact portion 500 is connected to the end of the elastic ear hook away from the sound-generating module 100a. When worn, the sound-generating module 100a and the contact portion 500 form a support state on both sides of the user's earlobe through the elastic ear hook.

[0057] It is understandable that the abutment 500 is provided with an elastic buffer layer. When worn, the first outer shell 300 of the sound-generating device fits near the ear canal opening, and the abutment 500 abuts against the inner side of the helix. This allows the sound-generating device and the abutment 500 to be reinforced on both sides of the user's helix through the elastic ear hook, improving wearing stability. For example, the elastic ear hook can be made of shape memory alloy material, which has good deformation recovery ability.

[0058] Compared with the prior art, the beneficial effects of this application are as follows: 1. Two independent rear acoustic cavities are formed between the first outer shell and the sound-generating bracket by the separator, so that the back side of the diaphragm of each sound-generating unit has its own dedicated acoustic space. This completely avoids the superposition interference of back side sound waves in the shared cavity in the existing technology, and ensures that the diaphragm vibration is only regulated by the air pressure of its own rear acoustic cavity, which significantly improves the linearity of vibration and reduces problems such as low-frequency muddiness and mid-high frequency distortion.

[0059] 2. The separator adopts an elastic structure design, which can adapt to assembly errors and achieve a tight fit with the sound module and the first shell, improving the sealing performance of the rear sound cavity; at the same time, the elastic material can absorb assembly stress and vibration impact, extend the product's service life, and adapt to the assembly needs of miniaturized headphones.

[0060] 3. The sound-generating bracket achieves an integrated structure through the bracket body, bracket flange, and sound hole boss to achieve precise positioning of the dual sound-generating units and ensure the stability of the front sound cavity volume; the cooperation between the bracket flange and the first outer shell slot improves assembly efficiency and structural stability, and the sound hole boss extends the sound wave transmission path to further optimize acoustic performance.

[0061] 4. The independent rear acoustic cavity is equipped with a dedicated pressure relief hole and acoustic damping components. It can be designed specifically according to the acoustic parameters (diaphragm size, vibration frequency) of a single sound unit to achieve precise back pressure control, so that each sound unit is in the optimal air pressure environment, giving full play to the synergistic advantages of dual units and improving sound quality balance and fidelity.

[0062] In summary, this application discloses a sound-generating device and headphones. The sound-generating device includes a first housing, a sound-generating module, and a separator. The first housing has a receiving cavity, a sound outlet, and a pressure relief hole. The sound-generating module is disposed within the receiving cavity and includes two sound-generating units and a sound-generating support. The diaphragms of the two sound-generating units are relatively spaced apart on the sound-generating support, and the space between the diaphragms of the two sound-generating units forms a front sound cavity, which communicates with the sound outlet. The separator is located between the first housing and the sound-generating support to form two independent rear sound cavities between the first housing and the sound-generating support. The two rear sound cavities correspond one-to-one with the two sound-generating units, and each rear sound cavity covers the side of the diaphragm of the corresponding sound-generating unit facing away from the front sound cavity. The two rear sound cavities are respectively connected to the corresponding pressure relief holes. By setting a separator between the first housing and the sound-generating support to form independent rear sound cavities corresponding one-to-one with the sound-generating units, this application achieves precise back pressure control, avoids sound wave interference, and improves sound quality stability and fidelity.

[0063] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A sound-generating device, characterized in that, include: A first housing, the first housing having a receiving cavity, a sound outlet and a pressure relief hole; A sound-generating module is disposed within the accommodating cavity. The sound-generating module includes two sound-generating units and a sound-generating support. The diaphragms of the two sound-generating units are disposed on the sound-generating support with a relative interval. The space between the diaphragms of the two sound-generating units forms a front sound cavity, which is connected to the sound outlet. A separator is located between the first housing and the sound-generating bracket to form two independent rear acoustic cavities between the first housing and the sound-generating bracket. The two rear acoustic cavities correspond one-to-one with the two sound-generating units, and each rear acoustic cavity covers the side of the diaphragm of the corresponding sound-generating unit that faces away from the front acoustic cavity. The two rear acoustic cavities are respectively connected to the corresponding pressure relief holes.

2. The sound-generating device as described in claim 1, characterized in that, The separator extends from the sound-generating bracket along the assembly axis of the sound-generating unit. One end of the separator abuts against the inner wall of the first housing, and the other end of the separator extends to the outer wall of the sound-generating bracket.

3. The sound-generating device as described in claim 1, characterized in that, The separator includes an elastic structure, the inner wall of which is fitted and connected to the outer peripheral wall of the sound-generating bracket, and the outer wall of which abuts against the inner wall of the first outer shell.

4. The sound-generating device as described in claim 3, characterized in that, The elastic structure is either an EVA elastic structure or a silicone elastic structure.

5. The sound-generating device as described in claim 1, characterized in that, An adhesive layer is provided between the separator and the sound-generating bracket, and the separator is fixedly connected to the sound-generating bracket through the adhesive layer.

6. The sound-generating device as claimed in claim 1, characterized in that, The sound-generating support includes: The bracket body has two mounting portions arranged opposite to each other. The two mounting portions are used to assemble two sound generating units along the axial direction, so that the diaphragms of the two sound generating units are arranged relatively spaced apart, and the space between the diaphragms of the two sound generating units forms the front sound cavity. A bracket flange extends outward from the sound-generating bracket to form an integral structure, and the bracket flange abuts against the inner wall of the first outer shell through the separator; A sound hole protrusion extends outward from the support body, and an acoustic communication cavity is formed on the sound hole protrusion, which is connected to the front sound cavity; The separator includes a first isolation portion and a second isolation portion. The first isolation portion is connected to the second isolation portion. The first isolation portion is used to fit and connect with the bracket body and extend to the bracket flange. The second isolation portion is used to fit and connect with the acoustic hole boss.

7. The sound-generating device as described in claim 6, characterized in that, The first outer shell is provided with a slot, and the first outer shell is connected to the bracket flange through the slot so that the bracket flange is embedded in the slot.

8. The sound-generating device as described in claim 6, characterized in that, The support flange includes: A flange body, the flange body extending from the support body along the assembly axis of the sound-generating unit; An inlet portion is symmetrically disposed on the side of the flange body away from the acoustic communication cavity; The first tangent edge is provided along the tangent direction of the flange body, and the first tangent edge extends from the side of the bracket body away from the acoustic communication cavity to the inlet portion; The second tangent edge is located on the side of the flange body away from the first tangent edge, and the second tangent edge extends from the side of the bracket body away from the acoustic communication cavity to the inlet portion.

9. The sound-generating device as claimed in claim 1, characterized in that, Each of the rear acoustic cavities is provided with an acoustic damping element, which covers the inner port of the corresponding pressure relief hole; The acoustic damping element is at least one of polyester cotton, metal filter, or porous ceramic.

10. An earphone, characterized in that, Includes the sound-generating device as described in any one of claims 1-9.

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