Sound production device and electronic device

Abstract

The application discloses a sound production device and electronic equipment, the sound production device comprises a shell, a magnetic circuit system, a vibration system, a support structure and a waterproof and breathable membrane, the magnetic circuit system is connected to the shell, the vibration system comprises a diaphragm, the diaphragm is formed into a ring structure, the outer side of the diaphragm is connected with the shell and is opposite and spaced from the magnetic circuit system, opposite sides of the diaphragm are respectively provided with a first cavity and a second cavity, the magnetic circuit system is located in the second cavity, the support structure is provided with a pressure relief channel, the inner side of the diaphragm is connected with one end of the support structure, the other end of the support structure is supported and fixed to the magnetic circuit system, so that the pressure relief channel is communicated with the first cavity and the second cavity, and the waterproof and breathable membrane covers one end of the pressure relief channel close to the first cavity. The application aims to provide a sound production device which can realize waterproof pressure relief and does not affect the appearance, the sound production device is applied to electronic equipment, effectively improves the acoustic performance of the sound production device, and improves the waterproof performance of the sound production device.

Description

Technical Field

[0001] This invention relates to the field of electroacoustic conversion technology, and in particular to a sound-generating device and an electronic device using the sound-generating device. Background Technology

[0002] With the rapid development of technology, people have increasingly higher demands for the sound quality of electronic devices. These demands extend beyond simply playing video and audio; they now require higher standards for the sound quality and reliability of the audio output. Smartwatches, as a common type of portable electronic device, have gained widespread application.

[0003] In related technologies, most smart wearable devices are required to be waterproof. In order to maintain the internal air pressure balance of smart wearable devices and not affect the sound performance of the sound-generating device, air pressure equalization holes are usually set on the shell of smart wearable devices. This not only makes the shell of smart wearable devices more complicated to process, but also affects the appearance of the shell. Summary of the Invention

[0004] The main objective of this invention is to provide a sound-generating device and an electronic device that can both relieve pressure and maintain the appearance of the device. This device can keep the air pressure on both sides of the diaphragm in a balanced state, preventing the gas expansion in the rear cavity from compressing the diaphragm and reducing its amplitude, thus ensuring the amount of diaphragm vibration and improving the acoustic performance of the device. At the same time, the waterproof and breathable membrane covering the end of the pressure relief channel near the first cavity can increase the waterproof performance of the device.

[0005] To achieve the above objectives, the present invention provides a sound-generating device, the sound-generating device comprising:

[0006] case;

[0007] A magnetic circuit system connected to the housing;

[0008] A vibration system includes a diaphragm, which is formed in a ring shape. The outer side of the diaphragm is connected to the housing. The diaphragm is opposite to and spaced from the magnetic circuit system. A first cavity and a second cavity are respectively provided on opposite sides of the diaphragm. The magnetic circuit system is located in the second cavity.

[0009] A supporting structure is provided, the supporting structure having a pressure relief channel, the inner side of the diaphragm being connected to one end of the supporting structure, and the other end of the supporting structure being supported and fixed to the magnetic circuit system, so that the pressure relief channel connects the first cavity and the second cavity; and

[0010] A waterproof and breathable membrane covers one end of the pressure relief channel near the first cavity.

[0011] In one embodiment, the support structure is integrally injection molded with the diaphragm.

[0012] In one embodiment, the diaphragm includes a first fixing portion, a first folded ring portion disposed around the first fixing portion, a connecting portion disposed around the first folded ring portion, a second folded ring portion disposed around the connecting portion, and a second fixing portion disposed around the second folded ring portion;

[0013] The first fixing part is provided with a through hole, and the second fixing part is connected to the housing;

[0014] Wherein, the end of the support structure away from the magnetic circuit system passes through the through hole; or, the end of the support structure away from the magnetic circuit system is connected to the side of the first fixing part facing the magnetic circuit system, so that the pressure relief channel is connected to the through hole.

[0015] In one embodiment, one of the through hole wall and the support structure is provided with a limiting protrusion, and the other is provided with a limiting groove. The support structure is disposed in the magnetic circuit system, and one end of the support structure away from the magnetic circuit system passes through the through hole, and the limiting protrusion is limited to the limiting groove.

[0016] And / or, the support structure is integrally injection molded with the first fixing part;

[0017] And / or, the first fixing part, the first folding ring part, the connecting part, the second folding ring part and the second fixing part are integrally formed structures;

[0018] And / or, the protrusion direction of the first folded ring portion is the same as or opposite to the protrusion direction of the second folded ring portion.

[0019] In one embodiment, the magnetic circuit system includes a magnetic yoke, a central magnetic circuit portion, and a side magnetic circuit portion. The periphery of the magnetic yoke is connected to the housing. The central magnetic circuit portion and the side magnetic circuit portion are located on the side of the magnetic yoke facing the diaphragm. The side magnetic circuit portion is located outside the central magnetic circuit portion and is spaced apart from the central magnetic circuit portion to form a magnetic gap. The end of the support structure away from the diaphragm is connected to the central magnetic circuit portion.

[0020] The vibration system also includes a voice coil, one end of which is connected to the diaphragm and surrounds the support structure, and the other end of which is suspended in the magnetic gap.

[0021] In one embodiment, the central magnetic circuit portion is provided with a connecting channel, one end of which is connected to the pressure relief channel, and the other end of which is connected to the second cavity.

[0022] In one embodiment, the central magnetic circuit portion includes a central magnet and a central washer stacked together, the central magnet being sandwiched between the central washer and the magnetic yoke, and the support structure being connected to the central washer;

[0023] The connecting channel is located at the central washer; or, the connecting channel is located between the central washer and the central magnet, and connects the central washer to the pressure relief channel; or, the connecting channel is located at the central magnet, and connects the central washer to the pressure relief channel.

[0024] In one embodiment, the communication channel is a groove located on the side of the center washer facing the diaphragm, and part of the groove extends to the connection between the center washer and the support structure and communicates with the pressure relief channel.

[0025] In one embodiment, the connecting channel includes a connecting segment and a through segment connected together, the connecting segment and the through segment being arranged at an angle, and the end of the connecting segment away from the through segment being connected to the second cavity;

[0026] The connecting section is located within the central washer, and the penetrating section passes through the side of the central washer facing away from the central magnet and is connected to the pressure relief channel; or, the connecting section is located between the central washer and the central magnet, and the penetrating section passes through the central washer and is connected to the pressure relief channel; or, the connecting section is located within the central magnet, and the penetrating section passes through the central magnet and the central washer and is connected to the pressure relief channel.

[0027] In one embodiment, the support structure and the central washer are integrally formed.

[0028] Alternatively, the support structure may be formed as a metal component, and the support structure may be bonded or welded to the central washer.

[0029] Alternatively, the support structure may be formed as a plastic material component, and the support structure may be integrally injection molded with the diaphragm, and the support structure may be bonded to or integrally injection molded with the central washer.

[0030] In one embodiment, the outer edge of the waterproof and breathable membrane is spaced apart from the diaphragm;

[0031] Alternatively, the outer edge of the waterproof and breathable membrane may be located on the surface of the diaphragm near the first cavity.

[0032] The present invention also proposes an electronic device, which includes the sound-generating device described above.

[0033] The sound-generating device of this invention connects a magnetic circuit system and a vibration system to a housing, such that the diaphragm and the magnetic circuit system are opposite and spaced apart, and the periphery of the diaphragm is connected to the housing. A first cavity and a second cavity are respectively located on opposite sides of the diaphragm, with the magnetic circuit system located within the second cavity. The diaphragm is formed into a ring structure, and a support structure is provided between the diaphragm and the magnetic circuit system. The inner side of the diaphragm is connected to one end of the support structure, and the other end of the support structure is fixed to the magnetic circuit system. A pressure relief channel is provided in the support structure, connecting the first and second cavities, thereby maintaining a balanced air pressure on both sides of the diaphragm. This prevents gas expansion and compression of the diaphragm due to a pressure difference between the first and second cavities, thus reducing the diaphragm's amplitude and ensuring the amount of diaphragm vibration, improving the acoustic performance of the sound-generating device. Simultaneously, a waterproof and breathable membrane covers the end of the pressure relief channel near the first cavity, increasing the waterproof performance of the sound-generating device. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, 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 the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0035] Figure 1 This is an exploded view of a sound-generating device in one embodiment of the present invention;

[0036] Figure 2 This is a cross-sectional schematic diagram of a sound-generating device in one embodiment of the present invention;

[0037] Figure 3 This is a schematic diagram of the connection structure of the shell, diaphragm and support structure in one embodiment of the present invention;

[0038] Figure 4 This is a schematic diagram of the central washer in one embodiment of the present invention;

[0039] Figure 5 This is an exploded view of the sound-generating device in another embodiment of the present invention;

[0040] Figure 6 This is a cross-sectional schematic diagram of the sound-generating device in another embodiment of the present invention;

[0041] Figure 7 This is a schematic diagram of the central washer in another embodiment of the present invention.

[0042] Explanation of icon numbers:

[0043]

[0044]

[0045] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0047] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0048] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0049] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0050] This invention proposes a sound-generating device 100. It is understood that the sound-generating device 100 is applied to electronic devices, such as smartwatches, mobile phones, speakers, computers, headphones, or televisions, etc., and is not limited thereto.

[0051] Please refer to the reference. Figures 1 to 7As shown, in this embodiment of the invention, the sound-generating device 100 includes a housing 1, a magnetic circuit system 3, a vibration system 2, a support structure 7, and a waterproof and breathable membrane 5. The magnetic circuit system 3 is connected to the housing 1. The vibration system 2 includes a diaphragm 21, which is formed into a ring structure. The outer side of the diaphragm 21 is connected to the housing 1. The diaphragm 21 is opposite to and spaced from the magnetic circuit system 3. A first cavity 4 and a second cavity are respectively provided on opposite sides of the diaphragm 21. The magnetic circuit system 3 is located in the second cavity. The support structure 7 is provided with a pressure relief channel 72. The inner side of the diaphragm 21 is connected to one end of the support structure 7. The other end of the support structure 7 is supported and fixed to the magnetic circuit system 3 so that the pressure relief channel 72 connects the first cavity 4 and the second cavity. The waterproof and breathable membrane 5 covers the end of the pressure relief channel 72 near the first cavity 4.

[0052] In this embodiment, the housing 1 of the sound-generating device 100 is used to install, fix, and support components such as the magnetic circuit system 3, the vibration system 2, the support structure 7, and the waterproof and breathable membrane 5. That is, the housing 1 provides the mounting base for the magnetic circuit system 3, the vibration system 2, the support structure 7, and the waterproof and breathable membrane 5. It is understood that the housing 1 can be a single integral structure or formed by the cooperation of multiple separate structures; no limitation is made here. In this embodiment, the housing 1 can be a frame structure with a cavity. The magnetic circuit system 3 and the vibration system 2 are arranged opposite to each other and connected to both sides of the housing 1, so that the housing 1, the magnetic circuit system 3, and the vibration system 2 enclose and form a second cavity.

[0053] Understandably, the outer side of the diaphragm 21 is connected to the housing 1, so that the first cavity 4 and the second cavity are respectively provided on opposite sides of the diaphragm 21. At this time, the magnetic circuit system 3 is located in the second cavity. One end of the support structure 7 is connected to the diaphragm 21, and the other end of the support structure 7 is located in the second cavity and connected to the magnetic circuit system 3. Of course, in other embodiments, the end of the support structure 7 away from the diaphragm 21 can also be located in the second cavity, which can be fixed to the inner wall of the housing 1. The specific configuration can be selected according to the actual usage requirements, as long as the pressure relief channel 72 can connect the first cavity and the second cavity.

[0054] In some embodiments, the sound-generating device 100 is applied in an electronic device, that is, the sound-generating device 100 can be mounted on the electronic device through the housing 1. It should be noted that the housing 1 of the sound-generating device 100 can be an independent shell or enclosure structure of the electronic device. In this case, the housing 1 integrates the magnetic circuit system 3, vibration system 2, support structure 7, and waterproof and breathable membrane 5 of the sound-generating device 100 into a single structure, thereby facilitating assembly and disassembly. Of course, the housing 1 of the sound-generating device 100 can also be integrally formed with the shell or enclosure structure of the electronic device, which can effectively improve structural strength and sealing performance.

[0055] In this embodiment, the sound-generating device 100 can be a single sound-generating unit structure. In this case, the housing 1 is used to house the fixed vibration system 2 and magnetic circuit system 3, etc. Thus, the sound-generating device 100 can be used as an independent component in electronic devices or sound-generating modules, which is not limited here. Of course, in other embodiments, the sound-generating device 100 can also be a module structure. In this case, the vibration system 2 and magnetic circuit system 3 of the single sound-generating unit are installed as multiple independent components on the housing 1 of the module structure, which is not limited here.

[0056] Understandably, by forming an installation space within the housing 1, the vibration system 2 and the magnetic circuit system 3 can be conveniently installed and fixed within the installation space. In this embodiment, the outer periphery of the diaphragm 21 in the vibration system 2 is connected to the housing 1, and the magnetic circuit system 3 is connected to the housing 1, opposite to and spaced from the diaphragm 21, to cooperate in forming a second cavity.

[0057] To maintain air pressure balance within the second cavity, the magnetic circuit system 3, the housing 1, or the magnetic circuit system 3 in conjunction with the housing 1 forms a vent hole connecting the second cavity. Understandably, when the sound-generating device 100 is installed within the casing or enclosure of an electronic device, the sound-generating device 100 and the casing or enclosure together form a rear cavity, which is connected to the second cavity of the sound-generating device 100 through the vent hole. It should be noted that, to further enhance the sound output of the sound-generating device 100, sound-absorbing particles are filled within the rear cavity, thereby effectively improving sound quality and effects.

[0058] In this embodiment, a support structure 7 is provided between the vibration system 2 and the magnetic circuit system 3, and a pressure relief channel 72 is provided within the support structure 7. The diaphragm 21 is formed into a ring structure, such that one end of the support structure 7 is connected to the inner side of the diaphragm 21, and the other end of the support structure 7 is located in the second cavity. In this way, the pressure relief channel 72 of the support structure 7 can be used to connect the first cavity 4 and the second cavity. This can effectively keep the air pressure on both sides of the diaphragm 21 in a balanced state, avoid the gas expansion in the second cavity from squeezing the diaphragm 21 and reducing the amplitude of the diaphragm 21, ensure the amount of vibration of the diaphragm 21, and improve the acoustic performance of the sound generating device 100.

[0059] Understandably, to further improve the waterproof performance of the sound-generating device 100, a waterproof and breathable membrane 5 is provided, covering the flow section of the pressure relief channel 72, thereby achieving both air permeability and waterproofing. Optionally, the waterproof and breathable membrane 5 covers one end of the pressure relief channel 72 closest to the first cavity 4. In this embodiment, the waterproof and breathable membrane 5 can be a waterproof and breathable insulating component or other structure; any structure capable of achieving both air permeability and waterproofing is acceptable and is not limited here.

[0060] It should be noted that the diaphragm 21 is provided with a through hole 211. The end of the support structure 7 connected to the diaphragm 21 is connected to the side of the diaphragm 21 facing the magnetic circuit system 3. At this time, one end opening of the pressure relief channel 72 is directly connected to or surrounds the through hole 211. The waterproof and breathable membrane 5 is connected to the side of the diaphragm 21 facing away from the magnetic circuit system 3 and completely covers the through hole 211. Alternatively, the waterproof and breathable membrane 5 is provided between the support structure 7 and the diaphragm 21, that is, the waterproof and breathable membrane 5 is located between one end opening of the pressure relief channel 72 and the through hole 211 and covers one end opening of the pressure relief channel 72 and the through hole 211. Alternatively, the waterproof and breathable membrane 5 is provided on the support structure 7 and covers the flow section of the pressure relief channel 72. This is not limited here.

[0061] Of course, in other embodiments, one end of the support structure 7 is located in the magnetic circuit system 3, and the other end of the support structure 7 away from the magnetic circuit system 3 passes through the through hole 211 of the diaphragm 21. The end face of the support structure 7 is flush with or protrudes from the side of the diaphragm 21 facing away from the magnetic circuit system 3. At this time, the waterproof and breathable membrane 5 is connected to the side of the diaphragm 21 facing away from the magnetic circuit system 3 and completely covers the through hole 211 and one end opening of the pressure relief channel 72. The outer wall of the support structure 7 is sealed adjacent to the hole wall of the through hole 211 of the diaphragm 21. This is not limited here.

[0062] In one embodiment, the outer edge of the waterproof and breathable membrane 5 is spaced apart from the diaphragm 21. Of course, in other embodiments, the outer edge of the waterproof and breathable membrane 5 is located on the surface of the diaphragm 21 near the first cavity 4, which is not limited here.

[0063] In this embodiment, the support structure 7 and the diaphragm 21 of the vibration system 2 are integrally injection molded; or, the support structure 7 and the magnetic circuit system 3 are integrally molded, for example, the support structure 7 and the central washer 332 of the magnetic circuit system 3 are integrally molded, which is not limited here. It is understood that the pressure relief channel 72 of the support structure 7 can be connected to the second cavity through the side wall of the support structure 7; or, the pressure relief channel 72 of the support structure 7 can be connected to the second cavity through part of the magnetic circuit system 3, that is, a connecting channel 35 connecting the second cavity and the pressure relief channel 72 is provided in the magnetic circuit system 3, which is not limited here.

[0064] The sound-generating device 100 of the present invention connects the magnetic circuit system 3 and the vibration system 2 to the housing 1, such that the diaphragm 21 is opposite to and spaced from the magnetic circuit system 3, and the periphery of the diaphragm 21 is connected to the housing 1, so that the opposite sides of the diaphragm 21 are respectively provided with a first cavity 4 and a second cavity. The magnetic circuit system 3 is located in the second cavity. By forming a ring structure of the diaphragm 21 and setting a support structure 7 between the diaphragm 21 and the magnetic circuit system 3, the inner side of the diaphragm 21 is connected to one end of the support structure 7, and the other end of the support structure 7 is supported and fixed to the magnetic circuit system 3. By setting a pressure relief channel 72 in the support structure 7, the first cavity 4 and the second cavity are connected by the pressure relief channel 72, thereby keeping the air pressure on both sides of the diaphragm 21 in a balanced state, avoiding the expansion of gas in the second cavity that squeezes the diaphragm 21 and reduces the amplitude of the diaphragm 21, ensuring the amount of vibration of the diaphragm, and improving the acoustic performance of the sound-generating device 100; at the same time, the waterproof and breathable membrane 5 covers the end of the pressure relief channel 72 near the first cavity, which can increase the waterproof performance of the sound-generating device 100.

[0065] To further improve the sealing effect, in one embodiment, an adhesive layer is provided between the waterproof and breathable membrane 5 and the diaphragm 21. The adhesive layer has vent holes, which are connected to the pressure relief channel 72. In other embodiments, an adhesive layer is provided between the waterproof and breathable membrane 5 and the supporting structure 7. The adhesive layer also has vent holes, which are connected to the pressure relief channel 72. It is understood that the diaphragm 21 and / or the supporting structure 7 are connected to the waterproof and breathable membrane 5 via an adhesive layer. This adhesive layer is arranged in a ring around the pressure relief channel 72, thus improving both the connection stability of the waterproof and breathable membrane 5 and the sealing performance.

[0066] Optionally, the support structure 7 and the diaphragm 21 are integrally injection molded. This can improve the connection stability between the support structure 7 and the diaphragm 21, and also improve the sealing performance between the support structure 7 and the wall of the through hole 21.

[0067] In one embodiment, the diaphragm 21 includes a first fixing portion 212, a first folded ring portion 213 surrounding the first fixing portion 212, a connecting portion 214 surrounding the first folded ring portion 213, a second folded ring portion 215 surrounding the connecting portion 214, and a second fixing portion 216 surrounding the second folded ring portion 215; the first fixing portion 212 is provided with a through hole 211, and the second fixing portion 216 is connected to the housing 1; wherein, the end of the support structure 7 away from the magnetic circuit system 3 passes through the through hole 211; or, the end of the support structure 7 away from the magnetic circuit system 3 is connected to the side of the first fixing portion 212 facing the magnetic circuit system 3, so that the pressure relief channel 72 is correspondingly connected to the through hole 211.

[0068] In this embodiment, as Figures 1 to 3 , Figure 5 , Figure 6As shown, by setting the diaphragm 21 as a double-folded ring structure, it is possible to conveniently connect and fix the diaphragm 21 to the support structure 7 through the first fixing part 212, while ensuring the vibration effect of the diaphragm 21. It is understood that the first folded ring part 213 is arranged around the through hole 211 and the support structure 7, so that the diaphragm 21 can be supported and fixed by the support structure 7, and pressure can be released through the pressure relief channel 72 of the support structure 7, ensuring the air pressure balance on both sides of the diaphragm 21.

[0069] Understandably, to further improve the structural strength of the diaphragm 21, the diaphragm 21 is also provided with a dome or reinforcing plate, etc. The dome or reinforcing plate may be disposed in the first fixing part 212 and / or the connecting part 214, which is not limited here. In this embodiment, the diaphragm 21 also includes a dome, which has a ring structure and is disposed in the connecting part 214. Optionally, the dome is connected to the side of the connecting part 214 facing away from the voice coil 22; or, the dome is disposed between the connecting part 214 and the voice coil 22, which is not limited here.

[0070] In one embodiment, such as Figure 2 As shown, one of the through hole 211 and the support structure 7 is provided with a limiting protrusion 71, and the other is provided with a limiting groove 217. The end of the support structure 7 away from the magnetic circuit system 3 passes through the through hole 211, and the limiting protrusion 71 is limited to the limiting groove 217.

[0071] Understandably, by providing a limiting groove 217 and a limiting protrusion 71 to the first fixing part 212 and the support structure 7 respectively, the connection stability between the first fixing part 212 and the support structure 7 can be improved, and limiting installation can also be achieved.

[0072] Of course, in another embodiment, such as Figure 6 As shown, the first fixing part 212 and the first folding ring part 213 form a receiving groove. The end of the support structure 7 away from the magnetic circuit system 3 extends into the receiving groove and is connected to the side of the first fixing part 212 facing the magnetic circuit system 3, so that the pressure relief channel 72 is connected to the through hole 211.

[0073] Optionally, the first fixing part 212 is bonded to the support structure 7. In one specific embodiment, the diaphragm 21 further includes a dome, which has an annular structure and is connected to the inner or outer side of the first fixing part 212. That is, the dome is arranged around the through hole 211 and sandwiched between the first fixing part 212 and the support structure 7, or the dome is connected to the side of the first fixing part 212 facing away from the support structure 7. This is not limited here.

[0074] It is understandable that the waterproof and breathable membrane 5 is located on the side of the first fixing part 212 facing away from the support structure 7 and completely covers the through hole 211; or, the waterproof and breathable membrane 5 is sandwiched between the first fixing part 212 and the support structure 7 and completely covers the through hole 211 and the pressure relief channel 72, which is not limited here.

[0075] Optionally, the support structure 7 and the first fixing part 212 are integrally injection molded.

[0076] In this embodiment, the first fixing part 212, the first folded ring part 213, the connecting part 214, the second folded ring part 215, and the second fixing part 216 of the diaphragm 21 are integrally formed. It can be understood that this arrangement can effectively ensure the structural strength of the diaphragm 21 without affecting the vibration performance of the diaphragm 21.

[0077] It should be noted that the first folded portion 213 and the second folded portion 215 of the diaphragm 21 can be a raised structure or a recessed structure. Optionally, the raised direction of the first folded portion 213 is the same as or opposite to the raised direction of the second folded portion 215.

[0078] In one embodiment, the magnetic circuit system 3 includes a magnetic yoke 32, a central magnetic circuit portion 33, and a side magnetic circuit portion 34. The periphery of the magnetic yoke 32 is connected to the housing 1. The central magnetic circuit portion 33 and the side magnetic circuit portion 34 are located on the side of the magnetic yoke 32 facing the diaphragm 21. The side magnetic circuit portion 34 is located outside the central magnetic circuit portion 33 and is spaced apart from the central magnetic circuit portion 33 to form a magnetic gap 31. The end of the support structure 7 away from the diaphragm 21 is connected to the central magnetic circuit portion 33. The vibration system 2 also includes a voice coil 22. One end of the voice coil 22 is connected to the diaphragm 21 and surrounds the support structure 7. The other end of the voice coil 22 is suspended in the magnetic gap 31. That is, at least a portion of the second cavity forms a vibration space 6, and the voice coil 22 vibrates up and down in the vibration space 6.

[0079] In this embodiment, as Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, the vibration system 2 includes a diaphragm 21 for vibrating and producing sound, and a voice coil 22 located below the diaphragm 21 to drive it to vibrate and produce sound. A magnetic circuit system 3 is used to drive the vibration system 2 to vibrate and produce sound. A magnetic yoke 32 of the magnetic circuit system 3 is connected to the housing 1. A central magnetic circuit portion 33 and a side magnetic circuit portion 34 are disposed on the side of the magnetic yoke 32 facing the diaphragm 21. The side magnetic circuit portion 34 is located outside the central magnetic circuit portion 33 and cooperates with the central magnetic circuit portion 33 to form a magnetic gap 31.

[0080] Understandably, one end of the voice coil 22 is suspended within the magnetic gap 31. A current is passed through the voice coil 22, causing it to vibrate under the influence of the magnetic field within the magnetic gap 31 of the magnetic circuit system 3, thus producing sound. To prevent polarization or oscillation of the voice coil 22 during vibration, the vibration system 2 also includes a centering support. One end of the centering support is connected to the voice coil 22, and the other end is connected to the housing 1.

[0081] It should be noted that the centering support can be disposed between the diaphragm 21 and the voice coil 22; or, the centering support can be disposed at the end of the voice coil 22 away from the diaphragm 21. In this embodiment, the centering support can also be used to conduct external circuitry to the voice coil 22.

[0082] To facilitate communication between the pressure relief channel 72 and the second cavity, in one embodiment, the central magnetic circuit portion 33 is provided with a connecting channel 35. One end of the connecting channel 35 is connected to the pressure relief channel 72, and the other end of the connecting channel 35 is connected to the second cavity. It is understood that the connecting channel 35 can be a straight channel, a curved channel, or any other structure capable of connecting the second cavity and the pressure relief channel 72; no limitation is made here. In this embodiment, one end of the connecting channel 35 is connected to the pressure relief channel 72, and the other end of the connecting channel 35 is connected to the second cavity.

[0083] In one embodiment, the central magnetic circuit portion 33 includes a central magnet 331 and a central washer 332 stacked together. The central magnet 331 is sandwiched between the central washer 332 and the magnetic yoke 32. The support structure 7 is connected to the central washer 332. A connecting channel 35 is provided in the central washer 332. Alternatively, the connecting channel 35 is provided between the central washer 332 and the central magnet 331, and passes through the central washer 332 and connects to the pressure relief channel 72. Alternatively, the connecting channel 35 is provided in the central magnet 331, and passes through the central washer 332 and connects to the pressure relief channel 72.

[0084] In this embodiment, as Figure 2 and Figure 6 As shown, the support structure 7 and the central washer 332 can be selected as an integrally molded structure. This facilitates processing and production, and improves the connection stability between the support structure 7 and the central washer 332. It is understood that the side magnetic circuit portion 34 can be a ring structure surrounding the central magnetic circuit portion 33. Of course, in other embodiments, multiple side magnetic circuit portions 34 can also be provided, with multiple side magnetic circuit portions 34 spaced apart from each other and surrounding the central magnetic circuit portion 33; this is not limited here.

[0085] Understandably, the side magnetic circuit portion 34 includes side magnets and side washer arranged in a stacked manner, with the side magnets sandwiched between the side washer and the magnetically conductive yoke 32. In this embodiment, the side washer and the center washer 332 can be selected as magnetically conductive plate structures. To further simplify the structure and save processing steps, the side washer and the housing 1 can optionally be integrally formed. To further improve the heat dissipation effect of the sound-generating device 100, the housing 1 can be selected as a metal housing, with the side washer integrally formed with the housing 1, thus effectively improving the heat dissipation effect.

[0086] In one embodiment, a connecting channel 35 is provided in the central washer 332. Optionally, the connecting channel 35 is a groove 333 provided on the side of the central washer 332 facing the diaphragm 21, and part of the groove 333 extends to the connection between the central washer 332 and the support structure 7 and communicates with the pressure relief channel 72.

[0087] In this embodiment, as Figure 1 , Figure 2 and Figure 4 As shown, by providing a groove 333 on the central washer 332, a portion of the groove 333 extends to the connection between the central washer 332 and the support structure 7, thereby facilitating the connection between the pressure relief channel 72 and the groove 333. This allows the airflow of the pressure relief channel 72 to be easily guided into the second cavity using the groove 333.

[0088] Understandably, the groove 333 can be a groove structure extending in a straight line. For example, the groove 333 can extend along the length direction of the central washer 332; or, the groove 333 can extend along the length direction of the central washer 332; or, the groove 333 can be arranged radially with the pressure relief channel 72 as the center, without limitation. Of course, the groove 333 can also be a groove structure extending in a curved, broken, or spiral shape, without limitation.

[0089] To further facilitate smooth pressure relief and improve airflow, at least a portion of the groove 333 extends to the connection between the central washer 332 and the support structure 7 and communicates with the pressure relief channel 72. At least a portion of the groove 333 is located outside the support structure 7, that is, at least a portion of the groove 333 is located outside the projection of the support structure 7 onto the central washer 332.

[0090] In this embodiment, the support structure 7 can be a cylindrical structure with an opening at at least one end, and the hollow cavity formed by the support structure 7 is the pressure relief channel 72. It is understood that there are multiple pressure relief channels 72, which are spaced apart and extend from the through hole 211 to the central washer 332. That is, the cross-section of the support structure 7 can have one hole, two holes, three holes, four holes, five holes, or more, and is not limited here. Optionally, the central washer 332 may also have multiple grooves 333, one end or part of which communicates with the pressure relief channel 72, and the other end or part of which communicates with the second cavity.

[0091] Of course, the connecting channel 35 can also be located between the central washer 332 and the central magnet 331, and connect the central washer 332 to the pressure relief channel 72. Optionally, the connecting channel 35 includes a connecting section 351 and a through section 352, which are arranged at an angle, and the end of the connecting section 351 away from the through section 352 connects to the second cavity. It can be understood that the end of the connecting section 351 away from the through section 352 connects to the second cavity, and the through section 352 is correspondingly connected to the pressure relief channel 72 of the support structure 7.

[0092] Optionally, the connecting section 351 is located within the central washer 332, and the through section 352 passes through the side of the central washer 332 facing away from the central magnet 331 and is connected to the pressure relief channel 72; or, the connecting section 351 is located between the central washer 332 and the central magnet 331, and the through section 352 passes through the central washer 332 and is connected to the pressure relief channel 72; or, the connecting section 351 is located within the central magnet 331, and the through section 352 passes through the central magnet 331 and the central washer 332 and is connected to the pressure relief channel 72.

[0093] Understandably, the connecting segment 351 is located within the central washer 332, and the penetrating segment 352 penetrates the side of the central washer 332 facing away from the central magnet 331 and connects to the pressure relief channel 72. Alternatively, the connecting segment 351 is located between the central washer 332 and the central magnet 331, and the penetrating segment 352 penetrates the central washer 332 and connects to the pressure relief channel 72. Alternatively, the connecting segment 351 is located within the central magnet 331, and the penetrating segment 352 penetrates both the central magnet 331 and the central washer 332 and connects to the pressure relief channel 72.

[0094] In this embodiment, as Figure 6 and Figure 7As shown, the connecting segment 351 is formed between the central washer 332 and the central magnet 331, that is, the central washer 332 and the central magnet 331 enclose each other. Optionally, the central washer 332 has a groove structure on the side facing the central magnet 331, and the central washer 332 and the central magnet 331 are stacked so that the groove structure cooperates with the central magnet 331 to form the connecting segment 351. The through segment 352 passes through the central washer 332 and communicates with the groove structure. This arrangement can achieve communication between the pressure relief channel 72 and the second cavity without affecting the magnetic flux of the central magnet 331.

[0095] It is understandable that there are multiple connecting segments 351, one end or part of which is connected to the through segment 352, and the other end of which is connected to the second cavity. This is not limited here.

[0096] Of course, in other embodiments, the pressure relief channel 72 includes a first extension section and a second extension section that are connected. The first extension section extends along the vibration direction of the diaphragm 21, and the end of the second extension section away from the first extension section passes through the side wall of the support structure 7 and is connected to the second cavity. The extension direction of the second extension section is set at an angle to the extension direction of the first extension section.

[0097] Understandably, the pressure relief channel 72 includes a first extension and a plurality of second extensions, the plurality of second extensions being spaced apart along the sidewall of the support structure 7. Alternatively, the pressure relief channel 72 includes a plurality of first extensions and a plurality of second extensions, each first extension communicating with at least one second extension, without limitation herein.

[0098] In this embodiment, as Figures 5 to 7 As shown, the support structure 7 and the central washer 332 are integrally molded. Optionally, the support structure 7 is formed as a metal part, and the support structure 7 is bonded or welded to the central washer 332. Of course, the support structure 7 can also be formed as a plastic part, and the support structure 7 and the diaphragm 21 are integrally injection molded, and the support structure 7 is bonded or integrally injection molded to the central washer 332; this is not limited here.

[0099] In one embodiment, the housing 1 includes a middle housing 12 and a rear housing 13, the magnetic circuit system 3 is connected to the rear housing 13, one side of the middle housing 12 is connected to the rear housing 13, the outer periphery of the diaphragm 21 is connected to the middle housing 12, and the diaphragm 21 and the middle housing 12 are integrally injection molded.

[0100] In this embodiment, as Figures 1 to 3 , Figure 5 and Figure 6 As shown, by setting the diaphragm 21 and the middle shell 12 as an integrally formed structure, the connection strength between the diaphragm 21 and the middle shell 12 can be improved, and the sealing performance between the diaphragm 21 and the middle shell 12 can be effectively ensured.

[0101] Understandably, to further improve the connection stability between the middle shell 12 and the diaphragm 21, one of the diaphragm 21 and the middle shell 12 is provided with a positioning protrusion, and the other is provided with a positioning groove. The positioning protrusion accommodates and confines the diaphragm 21. In this embodiment, one of the second fixing part 216 of the diaphragm 21 and the connecting part of the middle shell 12 is provided with a positioning protrusion, and the other is provided with a positioning groove. This combination of positioning protrusion and positioning groove achieves positioning and fit while also improving the connection strength.

[0102] In one embodiment, the housing 1 further includes a front housing 11, which covers the side of the middle housing 12 away from the rear housing 13, and the front housing 11 cooperates with the diaphragm 21 to define the first cavity 4.

[0103] In this embodiment, as Figures 1 to 3 , Figure 5 and Figure 6 As shown, the housing 1 comprises three parts: a front shell 11, a middle shell 12, and a rear shell 13. The front shell 11 and the rear shell 13 are connected to both sides of the middle shell 12 by ultrasonic welding, bonding, or other methods. It can be understood that by configuring the housing 1 as a front shell 11, a middle shell 12, and a rear shell 13, with the front shell 11 and the rear shell 13 connected to both sides of the middle shell 12, the housing 1 forms an installation space. This allows for convenient installation and fixation of the vibration system 2 and the magnetic circuit system 3 within the installation space.

[0104] Understandably, in the vibration system 2, the outer periphery of the diaphragm 21 is connected to the middle shell 12, and the diaphragm 21 and the front shell 11 cooperate to define the first cavity 4. The magnetic circuit system 3 is connected to the rear shell 13 and is opposite to and spaced from the diaphragm 21 to cooperate to form the second cavity.

[0105] In one embodiment, the middle shell 12 has a mounting surface disposed opposite to the front shell 11. It is understood that the mounting surface is located on the side of the middle shell 12 facing away from the rear shell 13. Optionally, the middle shell 12 and the front shell 11 are ultrasonically welded.

[0106] In this embodiment, the mounting surface is provided with welding ribs extending towards the front shell 11. It is understood that the middle shell 12 and the front shell 11 are ultrasonically welded. By providing welding ribs extending towards the front shell 11 on the mounting surface, the connection between the welding ribs and the front shell 11 can be achieved, thus improving the welding effect and realizing a seal. It is understood that the welding ribs of the middle shell 12 and the front shell 11 are connected by ultrasonic welding. Of course, in other embodiments, the middle shell 12 and the front shell 11 are sealed with adhesive, that is, the mounting surface is sealed with adhesive to the inner wall of the front shell 11.

[0107] Understandably, to avoid interference between the folded portion of the diaphragm 21 and the front shell 11 during vibration, thus affecting the vibration effect, in this embodiment, as... Figures 1 to 3 , Figure 5 , Figure 6 As shown, at least the second fold portion 215 of the diaphragm 21 is recessed from the front shell 11 side toward the rear shell 13 side, which is not limited here.

[0108] In one embodiment, the outer peripheral wall of the front shell 11 is also provided with a sealing ring 111, which is bonded to the front shell 11 or integrally injection molded.

[0109] In this embodiment, as Figures 1 to 3 , Figure 5 , Figure 6 As shown, by providing a sealing ring 111 on the outer peripheral wall of the front housing 11, when the sound-generating device 100 is installed in the housing or enclosure of the electronic device, the front housing 11 of the sound-generating device 100 is sealed to the housing or enclosure of the electronic device through the sealing ring 111. It is understood that the sealing ring 111 can be integrally injection molded onto the outer peripheral wall of the front housing 11. Of course, in other embodiments, the sealing ring 111 can also be sealed to the front housing 11 by adhesive bonding, which is not limited here.

[0110] It should be noted that the front shell 11 of the housing 1 is also provided with a sound outlet that connects to the first cavity 4, so that the sound generated by the vibration of the diaphragm 21 can be smoothly transmitted through the first cavity 4 and the sound outlet. It is understood that when the sound generating device 100 is installed in the housing or enclosure of the electronic device, the first cavity 4 is connected to the sound outlet pipe of the housing or enclosure of the electronic device through the sound outlet.

[0111] In this embodiment, the sound-generating device 100 is installed in the outer casing or enclosure of the electronic device. The middle shell 12 is sandwiched between the diaphragm 21 and the front shell 11. The front shell 11, the middle shell 12, and the diaphragm 21 form a first cavity 4. The rear shell 13, the front shell 11, the middle shell 12, and the diaphragm 21 cooperate to form a rear cavity. It can be understood that the rear cavity includes a vibration space 6 disposed within the sound-generating device 100 and a rear acoustic cavity located outside the sound-generating device 100 and communicating with the vibration space 6. The middle shell 12 and the front shell 11 are connected by a fixing method of ultrasonic welding or bonding. Specifically, the welding rib or adhesive layer is in the shape of a rectangular ring and is disposed between the front shell 11 and the middle shell 12.

[0112] The present invention also proposes an electronic device including the aforementioned sound-generating device 100. The specific structure of the sound-generating device 100 is as described in the foregoing embodiments. Since this electronic device adopts all the technical solutions of all the foregoing embodiments, it has at least all the beneficial effects brought about by the technical solutions of the foregoing embodiments, which will not be described in detail here.

[0113] In this embodiment, the electronic device also includes a device housing, which has a mounting cavity and a sound outlet channel communicating with the mounting cavity. The sound-generating device 100 is disposed in the mounting cavity of the device housing. The first cavity 4 of the sound-generating device 100 is communicating with the sound outlet channel. The sound-generating device 100 and the device housing also enclose a rear acoustic cavity. The vibration space 6 of the sound-generating device 100 is communicating with the rear acoustic cavity.

[0114] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A sound-generating device, characterized in that, The sound-generating device includes: case; A magnetic circuit system connected to the housing; A vibration system includes a diaphragm, which is formed in a ring shape. The outer side of the diaphragm is connected to the housing. The diaphragm is opposite to and spaced from the magnetic circuit system. A first cavity and a second cavity are respectively provided on opposite sides of the diaphragm. The magnetic circuit system is located in the second cavity. A supporting structure is provided, the supporting structure having a pressure relief channel, the inner side of the diaphragm being connected to one end of the supporting structure, and the other end of the supporting structure being supported and fixed to the magnetic circuit system, so that the pressure relief channel connects the first cavity and the second cavity; and A waterproof and breathable membrane covers one end of the pressure relief channel near the first cavity.

2. The sound-generating device as described in claim 1, characterized in that, The support structure and the diaphragm are integrally injection molded.

3. The sound-generating device as described in claim 1, characterized in that, The diaphragm includes a first fixing part, a first folded ring part surrounding the first fixing part, a connecting part surrounding the first folded ring part, a second folded ring part surrounding the connecting part, and a second fixing part surrounding the second folded ring part. The first fixing part is provided with a through hole, and the second fixing part is connected to the housing; Wherein, the end of the support structure away from the magnetic circuit system passes through the through hole; or, the end of the support structure away from the magnetic circuit system is connected to the side of the first fixing part facing the magnetic circuit system, so that the pressure relief channel is connected to the through hole.

4. The sound-generating device as described in claim 3, characterized in that, One of the through hole wall and the support structure is provided with a limiting protrusion, and the other is provided with a limiting groove. The support structure is provided in the magnetic circuit system. The end of the support structure away from the magnetic circuit system passes through the through hole, and the limiting protrusion is limited to the limiting groove. And / or, the support structure is integrally injection molded with the first fixing part; And / or, the first fixing part, the first folding ring part, the connecting part, the second folding ring part and the second fixing part are integrally formed structures; And / or, the protrusion direction of the first folded ring portion is the same as or opposite to the protrusion direction of the second folded ring portion.

5. The sound-generating device as described in claim 1, characterized in that, The magnetic circuit system includes a magnetic yoke, a central magnetic circuit portion, and a side magnetic circuit portion. The periphery of the magnetic yoke is connected to the housing. The central magnetic circuit portion and the side magnetic circuit portion are located on the side of the magnetic yoke facing the diaphragm. The side magnetic circuit portion is located outside the central magnetic circuit portion and is spaced apart from the central magnetic circuit portion to form a magnetic gap. The end of the support structure away from the diaphragm is connected to the central magnetic circuit portion. The vibration system also includes a voice coil, one end of which is connected to the diaphragm and surrounds the support structure, and the other end of which is suspended in the magnetic gap.

6. The sound-generating device as described in claim 5, characterized in that, The central magnetic circuit section is provided with a connecting channel, one end of which is connected to the pressure relief channel, and the other end of which is connected to the second cavity.

7. The sound-generating device as described in claim 6, characterized in that, The central magnetic circuit portion includes a central magnet and a central washer stacked together, the central magnet being sandwiched between the central washer and the magnetic yoke, and the support structure being connected to the central washer; The connecting channel is located at the central washer; or, the connecting channel is located between the central washer and the central magnet, and connects the central washer to the pressure relief channel; or, the connecting channel is located at the central magnet, and connects the central washer to the pressure relief channel.

8. The sound-generating device as claimed in claim 7, characterized in that, The connecting channel is a groove located on the side of the central washer facing the diaphragm, and part of the groove extends to the connection between the central washer and the support structure, and communicates with the pressure relief channel.

9. The sound-generating device as claimed in claim 7, characterized in that, The connecting channel includes a connecting section and a through section that are connected together. The connecting section and the through section are arranged at an angle, and the end of the connecting section away from the through section is connected to the second cavity. The connecting section is located within the central washer, and the penetrating section passes through the side of the central washer facing away from the central magnet and is connected to the pressure relief channel; or, the connecting section is located between the central washer and the central magnet, and the penetrating section passes through the central washer and is connected to the pressure relief channel; or, the connecting section is located within the central magnet, and the penetrating section passes through the central magnet and the central washer and is connected to the pressure relief channel.

10. The sound-generating device as claimed in claim 7, characterized in that, The supporting structure and the central washer are integrally formed. Alternatively, the support structure may be formed as a metal component, and the support structure may be bonded or welded to the central washer. Alternatively, the support structure may be formed as a plastic material component, and the support structure may be integrally injection molded with the diaphragm, and the support structure may be bonded to or integrally injection molded with the central washer.

11. The sound-generating device according to any one of claims 1 to 10, characterized in that, The outer edge of the waterproof and breathable membrane is spaced apart from the diaphragm. Alternatively, the outer edge of the waterproof and breathable membrane may be located on the surface of the diaphragm near the first cavity.

12. An electronic device, characterized in that, The electronic device includes a sound-generating device as described in any one of claims 1 to 11.

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