Sound-generating devices and electronic equipment

Abstract

The present invention discloses a sound-generating device and an electronic device. The sound-generating device includes a shell, a vibration system, and a magnetic circuit system. The shell is provided with a cavity and a front sound hole and a rear sound hole connected to the cavity. The vibration system includes two vibration components arranged in the cavity, a rear sound cavity connected to the rear sound hole is formed between the two vibration components, and the side of each vibration component facing away from the rear sound cavity is enclosed with the shell to form a front sound cavity connected to the front sound hole. Each vibration component is also provided with a through hole. The magnetic circuit system is arranged in the rear sound cavity. The side of the magnetic circuit system facing each vibration component is provided with a pillar, each pillar is connected to the shell through the through hole, and each pillar forms a sealed connection with a vibration component. The sound-generating device proposed by the present invention can reduce the vibration of the shell of the sound-generating device and can reduce the height of the sound-generating device in the Z direction.

Description

Technical Field

[0001] The present invention relates to the technical field of electroacoustic transducer technology, and in particular to a sound-generating device and an electronic device using the sound-generating device. Background Art

[0002] With the rapid development of technology, the popularity of audio devices is increasing. People's expectations for audio devices are no longer limited to video and audio playback, but also place greater demands on the reliability of audio equipment. Especially with the advent of the 5G era and the subsequent development of mobile multimedia technology, many audio devices have multiple entertainment functions such as video playback, digital cameras, games, and GPS navigation. All of these require the electronic components within audio devices to be increasingly sophisticated and compact.

[0003] In audio equipment, speakers are a commonly used electronic component, primarily used for playing audio signals. In related technologies, speakers are generally composed of a single-sided vibration system. The low-frequency vibration of a single-sided speaker affects system functionality, especially in head-mounted devices such as VR, AR, and Glass, where low-frequency vibration affects wearing comfort. However, due to the complex fixation of the magnetic circuit system in double-sided speakers, the utilization rate of the magnetic circuit system is low, which reduces the vibration driving force and affects the sensitivity of the speaker. It also increases the height of the speaker in the Z direction, making it impossible to achieve a lightweight and thin speaker design. Summary of the Invention

[0004] The main purpose of the present invention is to provide a sound-generating device and an electronic device, aiming to provide a sound-generating device that effectively improves driving force and sensitivity. The sound-generating device not only improves the utilization rate of the magnetic circuit system and effectively increases the driving force, but also increases the vibration space of the vibration system, effectively improves the sensitivity, and can reduce the height of the sound-generating device in the Z direction and reduce the vibration of the sound-generating device shell.

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

[0006] A housing, the housing being provided with a cavity and a front sound hole and a rear sound hole communicating with the cavity;

[0007] A vibration system comprising two vibration components disposed within the cavity, wherein a rear acoustic cavity communicating with the rear acoustic hole is formed between the two vibration components, and a side of each vibration component facing away from the rear acoustic cavity is enclosed by the shell to form a front acoustic cavity communicating with the front acoustic hole, and each vibration component is further provided with a through hole; and

[0008] A magnetic circuit system is provided in the rear acoustic cavity. A support is provided on the side of the magnetic circuit system facing each vibration component. Each support is connected to the shell through the through hole. Each support forms a sealed connection with a vibration component.

[0009] In one embodiment, the two pillars are symmetrically arranged relative to the magnetic circuit system;

[0010] And / or, the shell is provided with a through hole corresponding to the pillar, and one end of the pillar away from the magnetic circuit system is arranged in the through hole and forms a sealed connection with the shell.

[0011] In one embodiment, the two vibration components are symmetrically arranged relative to the magnetic circuit system.

[0012] In one embodiment, the magnetic circuit system is further provided with a magnetic gap, each of the vibration components includes a diaphragm and a voice coil, the periphery of the diaphragm is connected to the shell, the diaphragm is also provided with the through hole, the voice coil is located in the rear sound cavity, and one end of the voice coil is connected to the diaphragm and is arranged around the through hole, and the other end of the voice coil is suspended in the magnetic gap.

[0013] In one embodiment, each of the diaphragms includes an inner fold ring, an outer fold ring, and a dome connected between the inner fold ring and the outer fold ring, the inner fold ring surrounds the through hole and is sealed to the support, the outer fold ring is connected to the shell, and the voice coil is connected to the dome.

[0014] In one embodiment, a connecting platform is provided on the periphery of each of the pillars, and the inner fold includes a first connecting portion, an inner fold portion, and a second connecting portion connected in sequence, wherein the first connecting portion is connected to the connecting platform, and the second connecting portion is connected to the spherical top;

[0015] A support platform is provided on the inner wall of the shell. The outer folding ring includes an inner fixing portion, an outer folding ring portion and an outer fixing portion connected in sequence. The outer fixing portion is supported and fixed on the support platform. The inner fixing portion is connected to the spherical top.

[0016] In one embodiment, the protruding direction of the inner fold ring is consistent with or opposite to the protruding direction of the outer fold ring;

[0017] And / or, the protruding direction of the inner fold ring is consistent with the facing direction of the connecting platform;

[0018] And / or, the two voice coils are symmetrically arranged relative to the magnetic circuit system;

[0019] And / or, the two diaphragms are symmetrically arranged relative to the magnetic circuit system.

[0020] In one embodiment, the magnetic circuit system comprises:

[0021] a central magnetic circuit portion, the central magnetic circuit portion comprising a first magnetic conductive portion, a magnet, and a second magnetic conductive portion stacked in sequence, wherein the first magnetic conductive portion and the second magnetic conductive portion are both provided with the support on a side facing away from the magnet; and

[0022] The side magnetic circuit part includes a skeleton part and a magnetic conductive side plate, one side of the skeleton part is connected to the shell, and the other side of the skeleton part is connected to the magnetic conductive side plate, and the magnetic conductive side plate is located on the outside of the central magnetic circuit part and is spaced from the central magnetic circuit part to form a magnetic gap.

[0023] In one embodiment, the skeleton portion and the magnetic conductive side plate are an integrally formed structure;

[0024] And / or, the magnetic conductive side plates include a plurality of magnetic conductive side plates, the plurality of magnetic conductive side plates are arranged at intervals and arranged around the periphery of the central magnetic circuit portion;

[0025] And / or, the skeleton portion and the magnetic conductive side plate are arranged vertically;

[0026] And / or, the magnetic conductive side plate is arranged parallel to the peripheral side surface of the central magnetic circuit part.

[0027] In one embodiment, the two front sound holes and the rear sound hole are respectively located on opposite sides of the shell, the two front sound holes radiate sound waves with the same phase, and the sound waves radiated by the rear sound hole are opposite in phase to the sound waves radiated by the front sound holes.

[0028] In one embodiment, the housing comprises:

[0029] A first housing, comprising a first outer frame and an upper cover, wherein the first outer frame is an annular frame, and the upper cover is connected to one side of the first outer frame and encloses the front sound hole; and

[0030] A second housing, comprising a second outer frame and a lower cover, wherein the second outer frame is an annular frame, and the lower cover is connected to one side of the second outer frame and encloses the front sound hole;

[0031] The first outer frame and the second outer frame are butt-jointed to enclose and form the cavity and the rear sound hole communicating with the cavity.

[0032] The present invention also proposes an electronic device, comprising a device body and the above-mentioned sound-emitting device, wherein the sound-emitting device is connected to the device body, and the device body is provided with a first sound outlet and a second sound outlet, wherein the first sound outlet is connected to the front sound hole of the sound-emitting device, and the second sound outlet is connected to the rear sound hole of the sound-emitting device.

[0033] The sound-generating device of the technical solution of the present invention sets a cavity in the shell, thereby using the cavity to install, fix and protect the vibration system and the magnetic circuit system. By setting the vibration system as two vibration components, the vibration of the shell during the operation of the sound-generating device can be reduced; and each vibration component is also provided with a through hole, so that the magnetic circuit system is arranged in the rear sound cavity, and a pillar is provided on the side of the magnetic circuit system facing each vibration component, so that each pillar is connected to the shell through the through hole. On the one hand, the installation and fixation of the magnetic circuit system is realized, the structure of the fixed magnetic circuit system is simplified, and the height of the sound-generating device in the Z direction is effectively reduced. On the other hand, the utilization rate of the magnetic circuit system is effectively increased, thereby improving the driving force of the magnetic circuit system on the vibration system, and at the same time increasing the vibration space of the two vibration components, thereby effectively improving the sensitivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0035] Figure 1 is a cross-sectional schematic diagram of a sound-generating device in one embodiment of the present invention;

[0036] Figure 2 Schematic diagram of a cross-sectional exploded view of a sound-generating device in one embodiment of the present invention.

[0037] Description of Figure Numbers:

[0038] Label name Label name 100 Sound-generating device 2111 Through hole 1 case 2112 inner folding ring 11 cavity 2113 Outer fold 111 Back vocal cavity 2114 Dome 112 Front vocal cavity 212 voice coil 12 front sound hole 3 Magnetic circuit system 13 rear sound hole 31 Magnetic gap 14 Support platform 32 Central magnetic circuit part 15 First shell 321 First magnetic conductive part 151 First outer frame 322 magnet 152 Upper cover 323 Second magnetic conductive part 16 Second shell 324 pillar 161 Second outer frame 3241 Connection Station 162 Lower cover 33 Side magnetic circuit part 2 Vibration system 331 Skeleton 21 Vibration components 332 Magnetic side panels 211 diaphragm

[0039] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0041] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0042] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or an option in which both A and B are satisfied.

[0043] In addition, in the present invention, descriptions such as "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0044] With the rapid development of technology, the popularity of audio devices is increasing. People's expectations for audio devices are no longer limited to video and audio playback, but also place greater demands on the reliability of audio equipment. Especially with the advent of the 5G era and the subsequent development of mobile multimedia technology, many audio devices have multiple entertainment functions such as video playback, digital cameras, games, and GPS navigation. All of these require the electronic components within audio devices to be increasingly sophisticated and compact.

[0045] In audio equipment, speakers are a commonly used electronic component, primarily used for playing audio signals. In related technologies, speakers are generally composed of a single-sided vibration system. The low-frequency vibration of a single-sided speaker affects system functionality, especially in head-mounted devices such as VR, AR, and Glass, where low-frequency vibration affects wearing comfort. However, due to the complex fixation of the magnetic circuit system in double-sided speakers, the utilization rate of the magnetic circuit system is low, which reduces the vibration driving force and affects the sensitivity of the speaker. It also increases the height of the speaker in the Z direction, making it impossible to achieve a lightweight and thin speaker design.

[0046] Based on the above concepts and problems, the present invention proposes a sound-generating device 100. It is understandable that the sound-generating device 100 is applied to a wearable device, which may be a headset, VR, AR, Glass, etc., which is not limited here.

[0047] Please refer to Figure 1 and Figure 2As shown, in an embodiment of the present invention, the sound-emitting device 100 includes a shell 1, a vibration system 2 and a magnetic circuit system 3, wherein the shell 1 is provided with a cavity 11 and a front sound hole 12 and a rear sound hole 13 connected to the cavity 11, the vibration system 2 includes two vibration components 21 arranged in the cavity 11, and a rear sound cavity 111 connected to the rear sound hole 13 is formed between the two vibration components 21, and the side of each vibration component 21 facing away from the rear sound cavity 111 is enclosed with the shell 1 to form a front sound cavity 112 connected to the front sound hole 12, and each vibration component 21 is also provided with a through hole 2111, and the magnetic circuit system 3 is arranged in the rear sound cavity 111, and the side of the magnetic circuit system 3 facing each vibration component 21 is provided with a pillar 324, each pillar 324 is connected to the shell 1 through the through hole 2111, and each pillar 324 forms a sealed connection with a vibration component 2.

[0048] In this embodiment, the housing 1 of the sound-generating device 100 is used to mount, secure, and protect components such as the vibration system 2 and the magnetic circuit system 3. In other words, the housing 1 provides a mounting base for the vibration system 2 and the magnetic circuit system 3. It is understood that the housing 1 may be a mounting shell, a fixed shell, a mounting box, a box, a cylinder, or a frame having a cavity 11.

[0049] It is understandable that the shell 1 can be an integral structure, which can improve the sealing performance of the shell 1. Of course, the shell 1 can be a split structure, for example, the shell 1 includes a first shell 15 and a second shell 16, and the first shell 15 and the second shell 16 are docked and connected to enclose the cavity 11. It should be noted that the first shell 15 and the second shell 16 of the shell 1 can be a flat plate structure and the other can be a U-shaped groove structure, or the first shell 15 and the second shell 16 can both be U-shaped groove structures, or at least one of the first shell 15 and the second shell 16 can be a cylindrical structure with one end open and the other end closed, or the first shell 15 and the second shell 16 can both be cylindrical or frame structures with both ends open, which is not limited here.

[0050] In this embodiment, the vibration system 2 is set as two vibration components 21, and the two vibration components 21 are arranged at intervals in the cavity 11, so that a rear sound cavity 111 is formed between the two vibration components 21, and the side of each vibration component 21 facing away from the rear sound cavity 111 is enclosed with the shell 1 to form a front sound cavity 112, and the magnetic circuit system 3 is arranged in the rear sound cavity 111, that is, the magnetic circuit system 3 is located between the two vibration components 21, so that the two vibration components 21 share one magnetic circuit system 3, which effectively improves the utilization rate of the magnetic field. At the same time, the two vibration components 21 move closer to or away from each other, which can reduce the vibration of the shell during the operation of the sound-generating device.

[0051] It is understood that the two front acoustic cavities 112 of the sound-generating device 100 can be interconnected or independent of each other. The front acoustic cavity 112 and the rear acoustic cavity 111 are two independent cavities and are not interconnected. The front acoustic holes 12 on the housing 1 can be one or two. Optionally, there are two front acoustic holes 12, each of which is connected to a front acoustic cavity 112.

[0052] In this embodiment, the two front sound holes 12 can be arranged on the same side or different sides of the shell 1. Optionally, the two front sound holes 12 are arranged on the same side of the shell 1. It should be noted that the two front sound holes 12 and the rear sound hole 13 are located on different sides of the shell 1, so that the front sound holes 12 and the rear sound holes 13 are at different distances from the human ear, achieving the technical effect of far-field sound cancellation. Optionally, the two front sound holes 12 and the rear sound holes 13 are located on opposite sides of the shell 1 and form a dipole effect, so that far-field sound cancellation of the sound-emitting device 100 can be achieved, thereby improving the user experience of the sound-emitting device 100.

[0053] It can be understood that the two front sound holes 12 and the rear sound hole 13 are respectively located on opposite sides of the shell 1, and the two front sound holes 12 radiate sound waves of the same phase, and the sound waves radiated by the rear sound hole 13 are opposite in phase to the sound waves radiated by the front sound holes 12 to form a dipole effect, thereby realizing far-field sound elimination of the sound-emitting device 100 and improving the user experience of the sound-emitting device 100.

[0054] In one embodiment, if Figure 1 and Figure 2 As shown, the two pillars 324 are symmetrically arranged relative to the magnetic circuit system 3. It is understood that by arranging the two pillars 324 in a symmetrical structure, the magnetic circuit system 3 can be stably installed, and the balance of the sound-generating device 100 can be improved, thereby enhancing the sound effect. Optionally, both pillars 324 are arranged in the middle of the magnetic circuit system 3.

[0055] It is understood that the support 324 can be connected to the inner wall of the housing 1. Figure 1 and Figure 2 As shown, the housing 1 is provided with a through hole corresponding to the support 324. The end of the support 324 away from the magnetic circuit system 3 is disposed in the through hole and forms a sealed connection with the housing 1. In this embodiment, the outer wall periphery of the support 324 and the hole wall of the through hole in the housing 1 can be sealed by using sealant or welding, etc., which is not limited here.

[0056] In one embodiment, if Figure 1 and Figure 2As shown, the two vibration components 21 are symmetrically arranged relative to the magnetic circuit system 3. It can be understood that by arranging the two vibration components 21 into a symmetrical structure, the double-sided sound effect of the sound-generating device 100 is further improved, and it can be achieved that when the two vibration components 21 vibrate and generate sound, the sound is transmitted through two independent front sound cavities 112 and two front sound holes 12, and a superimposed sound effect is formed, thereby improving the sound effect of the sound-generating device 100.

[0057] In one embodiment, the magnetic circuit system 3 is further provided with a magnetic gap 31. Each vibration component 21 includes a diaphragm 211 and a voice coil 212. The periphery of the diaphragm 211 is connected to the shell 1. The diaphragm 211 is also provided with a through hole 2111. The voice coil 212 is located in the rear sound cavity 111, and one end of the voice coil 212 is connected to the diaphragm 211 and is arranged around the through hole 2111. The other end of the voice coil 212 is suspended in the magnetic gap 31.

[0058] In this embodiment, if Figure 1 and Figure 2 As shown, the magnetic gap 31 of the magnetic circuit system 3 can be a through-hole structure. Of course, the magnetic circuit system 3 can also be provided with two magnetic gaps 31 corresponding to the two vibration components 21. In this case, the two magnetic gaps 31 are located at opposite ends of the magnetic circuit system 3 and are not connected to each other. It can be understood that in order to increase the utilization rate of the magnetic circuit system 3, the magnetic circuit system 3 is provided with a magnetic gap 31. The magnetic gap 31 is provided through the magnetic circuit system 3, so that the two voice coils 212 are suspended in the magnetic gap 31 and spaced apart.

[0059] It is understandable that the voice coils 212 of the two vibration assemblies 21 are both located in the rear acoustic cavity 111. In this case, the diaphragms 211 of the two vibration assemblies 21 are arranged opposite each other and spaced apart, and are located on opposite sides of the magnetic circuit system 3. The two diaphragms 211 divide the cavity 11 into three cavities, namely the rear acoustic cavity 111 located in the middle and the two front acoustic cavities 112 located on both sides. Optionally, the two diaphragms 211 are arranged symmetrically with respect to the magnetic circuit system 3.

[0060] To improve the sound quality of the sound-generating device 100, the two voice coils 212 are optionally arranged symmetrically with respect to the magnetic circuit system 3. In this embodiment, the spacing between the two voice coils 212, that is, the spacing between the two voice coils 212 within the magnetic gap 31, is greater than twice the vibration amplitude of the voice coils 212. This prevents mutual interference between the two voice coils 212.

[0061] Of course, in order to avoid interference between the two voice coils 212 during vibration, the width of the magnetic gap 31 may be set larger so that the two voice coils 212 are staggered in the width direction of the magnetic gap 31 .

[0062] In one embodiment, each diaphragm 211 includes an inner fold ring 2112, an outer fold ring 2113, and a dome 2114 connected between the inner fold ring 2112 and the outer fold ring 2113. The inner fold ring 2112 surrounds the through hole 2111 and is sealed to the support 324. The outer fold ring 2113 is connected to the shell 1, and the voice coil 212 is connected to the dome 2114.

[0063] In this embodiment, if Figure 1 and Figure 2 As shown, by setting the diaphragm 211 as a double-fold ring structure, the outer fold ring 2113 is used to connect the shell 1 and the ball top 2114, and the inner fold ring 2112 is used to connect the ball top 2114 and the support 324. In this way, the inner fold ring 2112 and the outer fold ring 2113 can be used to effectively ensure the vibration compliance of the diaphragm 211, avoiding problems such as the diaphragm 211 breaking during the vibration process.

[0064] It is understood that the inner fold 2112 is provided with a through hole 2111 or the inner fold 2112 is formed with a through hole 2111, and the support 324 is provided through the through hole 2111 and is connected and sealed with the inner fold 2112 to seal the front acoustic cavity 112 and the rear acoustic cavity 111. In this embodiment, the inner fold 2112, outer fold 2113, and dome 2114 of the diaphragm 211 can be an integrally formed structure or can be separately provided, which is not limited here. Optionally, the dome 2114 can be connected to the inner fold 2112 or the outer fold 2113 using adhesive, which is not limited here.

[0065] In one embodiment, if Figure 1 and Figure 2 As shown, a connecting platform 3241 is provided on the periphery of each pillar 324 , and the inner fold ring 2112 includes a first connecting portion, an inner fold ring portion and a second connecting portion connected in sequence. The first connecting portion is connected to the connecting platform 3241 , and the second connecting portion is connected to the ball top 2114 .

[0066] As will be appreciated, by providing a connecting platform 3241 on the periphery of the support 324, the connecting platform 3241 provides support and mounting for the first connecting portion of the inner fold 2112, thereby improving connection stability and sealing. Alternatively, the first connecting portion and the connecting platform 3241 may be connected using adhesive. The second connecting portion and the dome 2114 may also be connected using adhesive, although this is not a limitation herein.

[0067] It should be noted that the first connection portion of the inner fold ring 2112 is annular and encloses the through hole 2111. The inner fold ring is arranged around the outside of the first connection portion, and the second connection portion is arranged around the outside of the inner fold ring. Optionally, the first connection portion, the inner fold ring portion and the second connection portion of the inner fold ring 2112 are an integrally formed structure, which is not limited here.

[0068] In this embodiment, in order to prevent the connecting platform 3241 on the periphery of the support 324 from causing vibration interference to the inner fold portion of the inner fold 2112 , the protruding direction of the inner fold 2112 is consistent with the facing direction of the connecting platform 3241 .

[0069] In one embodiment, if Figure 1 and Figure 2 As shown, a support platform 14 is provided on the inner wall of the shell 1 , and the outer folding ring 2113 includes an inner fixing portion, an outer folding ring portion and an outer fixing portion connected in sequence. The outer fixing portion is supported and fixed on the support platform 14 , and the inner fixing portion is connected to the ball top 2114 .

[0070] As will be appreciated, by providing a support platform 14 on the inner wall of the housing 1, the support platform 14 provides support and mounting for the outer fixing portion of the outer fold ring 2113, thereby improving connection stability and sealing. Alternatively, the outer fixing portions can be connected to each other using adhesive. The inner fixing portion can also be connected to the dome 2114 using adhesive, which is not a limitation here.

[0071] It should be noted that the outer folding ring portion of the outer folding ring 2113 is arranged around the outside of the inner fixing portion, and the outer fixing portion is arranged around the outside of the outer folding ring portion. Optionally, the inner fixing portion, the outer folding ring portion and the outer fixing portion of the outer folding ring 2113 are an integrally formed structure, which is not limited here.

[0072] In this embodiment, the support platform 14 can be a protruding structure protruding from the inner wall of the housing 1, or a stepped structure, without limitation. Optionally, the protruding direction of the inner fold 2112 is consistent with or opposite to the protruding direction of the outer fold 2113. It should be noted that the two diaphragms 211 of the two vibration assemblies 21 are symmetrically arranged relative to the magnetic circuit system 3.

[0073] In one embodiment, the magnetic circuit system 3 includes a central magnetic circuit portion 32 and a side magnetic circuit portion 33, and pillars 324 are provided on opposite sides of the central magnetic circuit portion 32. The side magnetic circuit portion 33 is located on the outside of the central magnetic circuit portion 32 and is spaced from the central magnetic circuit portion 32 to form a magnetic gap 31.

[0074] It can be understood that the side magnetic circuit part 33 can be an integral structure, such as an annular structure; the side magnetic circuit part 33 can also be formed by the cooperation of multiple split structures, for example, the side magnetic circuit part 33 includes multiple side magnetic circuit parts 33, and the multiple side magnetic circuit parts 33 are spaced and arranged around the peripheral direction of the central magnetic circuit part 32, which is not limited here.

[0075] In one embodiment, if Figure 1 and Figure 2As shown, the central magnetic circuit portion 32 includes a first magnetic conductive portion 321, a magnet 322 and a second magnetic conductive portion 323 which are stacked in sequence, and a support 324 is provided on the side of the first magnetic conductive portion 321 and the second magnetic conductive portion 323 facing away from the magnet 322; the side magnetic circuit portion 33 includes a skeleton portion 331 and a magnetic conductive side plate 332, one side of the skeleton portion 331 is connected to the shell 1, and the other side of the skeleton portion 331 is connected to the magnetic conductive side plate 332, and the magnetic conductive side plate 332 is located on the outside of the central magnetic circuit portion 32, and is spaced from the central magnetic circuit portion 32 to form a magnetic gap 31.

[0076] As will be appreciated, the first magnetic conductive portion 321, magnet 322, and second magnetic conductive portion 323 of the central magnetic circuit portion 32 are plate-like structures and are stacked. The central magnetic circuit portion 32 is fixedly connected to the housing 1 via two struts 324. This not only ensures the fixed installation of the central magnetic circuit portion 32, but also increases the thickness of the magnet 322 in the central magnetic circuit portion 32, thereby increasing the magnetic field utilization efficiency and providing driving force for the voice coil 212.

[0077] It should be noted that in the related art, a support plate is typically used to separate the central magnetic circuit portion 32 and provide a mounting and fixing base for the central magnetic circuit portion 32, that is, the support plate and the magnet 322 are stacked. In sound-generating devices of the same size, the provision of the support plate necessarily reduces the thickness of the magnet 322; and in sound-generating devices with the same magnet 322 thickness, the provision of the support plate necessarily increases the height of the sound-generating device in the Z direction, resulting in the inability of existing sound-generating devices to achieve high magnetic field utilization while achieving lightweight and thinness.

[0078] In this embodiment, the central magnetic circuit portion 32 is secured and installed by providing support pillars 324 on opposite sides of the central magnetic circuit portion 32. This not only achieves secure installation, but also effectively increases the thickness of the magnet 322 in a sound-producing device 100 of the same size, thereby improving magnetic field utilization and providing driving force for the voice coil 212. Furthermore, in a sound-producing device 100 with the same magnet 322 thickness, the height of the sound-producing device 100 in the Z direction can be reduced. Furthermore, in a sound-producing device 100 with the same magnet 322 thickness and the same size, the vibration space of the vibration assembly 21 can be effectively increased, thereby improving the sensitivity of the sound-producing device 100.

[0079] Optionally, the skeleton portion 331 and the magnetically conductive side plates 332 of the side magnetic circuit portion 33 are integrally formed to enhance structural strength. In this embodiment, the skeleton portion 331 of the side magnetic circuit portion 33 may be an annular structure. Optionally, one side of the skeleton portion 331 is sandwiched between the first outer shell 15 and the second outer shell 16 of the housing 1.

[0080] It is understandable that the magnetic conductive side plate 332 of the magnetic path portion 33 can be an integral annular cylindrical structure or a plurality of separate structures, which is not limited here. Figure 1 and Figure 2 As shown, the magnetic conductive side plates 332 include a plurality of magnetic conductive side plates 332 , which are arranged at intervals and surround the periphery of the central magnetic circuit portion 32 .

[0081] In this embodiment, the frame portion 331 and the magnetically conductive side plates 332 are arranged at an angle. Alternatively, the frame portion 331 and the magnetically conductive side plates 332 are arranged perpendicularly. It is understood that the cross-sections of the frame portion 331 and the magnetically conductive side plates 332 are L-shaped or T-shaped. Alternatively, the magnetically conductive side plates 332 are arranged parallel to the peripheral side surfaces of the central magnetic circuit portion 32.

[0082] In the sound-emitting device of the present invention, the two front sound holes and the rear sound hole are respectively located on opposite sides of the shell. The two front sound holes radiate sound waves of the same phase, and the sound waves radiated by the rear sound hole are opposite in phase to the sound waves radiated by the front sound holes. During the operation of the sound-emitting device, an acoustic dipole effect is formed, which can reduce the sound leakage phenomenon of the sound-emitting device during application.

[0083] In one embodiment, if Figure 1 and Figure 2 As shown, the housing 1 includes a first outer shell 15 and a second outer shell 16. The first outer shell 15 includes a first outer frame 151 and an upper cover 152. The first outer frame 151 is an annular frame. The upper cover 152 covers and connects to one side of the first outer frame 151 and encloses a front sound hole 12. The second outer shell 16 includes a second outer frame 161 and a lower cover 162. The second outer frame 161 is an annular frame. The lower cover 162 covers and connects to one side of the second outer frame 161 and encloses a front sound hole 12. The first outer frame 151 and the second outer frame 161 are connected to each other and enclose a cavity 11 and a rear sound hole 13 connected to the cavity 11. The two front sound holes 12 and the rear sound hole 13 are located on opposite sides of the housing 1 and form a dipole effect.

[0084] In this embodiment, by setting the first shell 15 as a first outer frame 151 and an upper cover 152, and setting the second shell 16 as a second outer frame 161 and a lower cover 162, that is, setting the shell 1 as a shell structure in which multiple split structures cooperate to form a specific cavity 11, such a setting can facilitate the disassembly and assembly of components such as the vibration system 2 and the magnetic circuit system 3.

[0085] It is understandable that the first shell 15 and the second shell 16 can be optionally symmetrical structures. The first outer frame 151 and the second outer frame 161 are annular or square frames, the upper cover 152 is connected to one side of the first outer frame 151, and encloses the front sound hole 12, the lower cover 162 is connected to one side of the second outer frame 161, and encloses the front sound hole 12, and the first outer frame 151 of the first shell 15 and the second outer frame 161 of the second shell 16 are connected in a butt connection, so that the upper cover 152, the first outer frame 151, the second outer frame 161 and the lower cover 162 enclose the cavity 11. Optionally, the two front sound holes 12 are located on the same side of the shell 1 and are symmetrically arranged.

[0086] Of course, the front sound hole 12 can be provided on the upper cover 152 of the first housing 15; alternatively, the front sound hole 12 can also be provided on the first outer frame 151 of the first housing 15; alternatively, the front sound hole 12 can also be formed by the upper cover 152 and the first outer frame 151, and the above is not limited here. It is understood that the front sound hole 12 can be provided on the lower cover 162 of the second housing 16; alternatively, the front sound hole 12 can also be provided on the second outer frame 161 of the second housing 16; alternatively, the front sound hole 12 can also be formed by the lower cover 162 and the second outer frame 161, and the above is not limited here.

[0087] It can be understood that the rear sound hole 13 can be set on the first outer frame 151 of the first shell 15; or, the rear sound hole 13 can be set on the second outer frame 161 of the second shell 16; or, the rear sound hole 13 can be formed by the first outer frame 151 and the second outer frame 161, which is not limited here.

[0088] In this embodiment, the shell 1 can be a plastic shell, which is convenient for processing; the shell 1 can also be a metal shell, which can not only increase the sound cavity volume of the sound-emitting device 100, but also improve the heat dissipation effect; of course, the shell 1 can also be a structure integrally formed of plastic and metal, which is not limited here.

[0089] The present invention also provides an electronic device comprising a device body and the aforementioned sound-generating device 100, which is connected to the device body. The specific structure of the sound-generating device 100 is similar to that of the aforementioned embodiments. Since this electronic device utilizes all the technical solutions of all the aforementioned embodiments, it at least has all the beneficial effects brought about by the technical solutions of the aforementioned embodiments, and therefore will not be further elaborated here.

[0090] In this embodiment, the device body is provided with a first sound outlet and a second sound outlet. The first sound outlet is correspondingly connected to the front sound hole 12 of the sound-emitting device 100 , and the second sound outlet is correspondingly connected to the rear sound hole 13 of the sound-emitting device 100 .

[0091] It is understandable that the first sound outlet can be one, and the first sound outlet can be connected to the two front sound holes 12 of the sound-emitting device 100 through the sound channel. Of course, in other embodiments, the first sound outlet can also include two sub-sound outlets, and the two sub-sound outlets are connected to the two front sound holes 12 respectively, which is not limited here.

[0092] The above descriptions are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention's description and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A sound-generating device, characterized in that: The sound-generating device comprises: A housing, the housing being provided with a cavity and a front sound hole and a rear sound hole communicating with the cavity; A vibration system comprising two vibration components disposed within the cavity, wherein a rear acoustic cavity communicating with the rear acoustic hole is formed between the two vibration components, and a side of each vibration component facing away from the rear acoustic cavity is enclosed by the shell to form a front acoustic cavity communicating with the front acoustic hole, and each vibration component is further provided with a through hole; and a magnetic circuit system disposed in the rear acoustic cavity, wherein a support is provided on a side of the magnetic circuit system facing each of the vibration components, each of the supports passing through the through hole and connected to the housing, and each of the supports forms a sealed connection with a vibration component; Each of the vibration components includes a diaphragm, each of the diaphragms includes an inner fold ring, an outer fold ring, and a spherical top connected between the inner fold ring and the outer fold ring, the inner fold ring surrounds the through hole and is sealed to the pillar, the outer fold ring is connected to the shell, the magnetic circuit system includes a central magnetic circuit part, the pillars are provided on opposite sides of the central magnetic circuit part, and the central magnetic circuit part is fixedly connected to the shell through two pillars.

2. The sound-generating device according to claim 1, wherein: The two pillars are symmetrically arranged relative to the magnetic circuit system; And / or, the shell is provided with a through hole corresponding to the pillar, and one end of the pillar away from the magnetic circuit system is arranged in the through hole and forms a sealed connection with the shell.

3. The sound-generating device according to claim 1, characterized in that: The two vibration components are symmetrically arranged relative to the magnetic circuit system.

4. The sound-generating device according to claim 1, wherein: The magnetic circuit system is also provided with a magnetic gap, and each of the vibration components also includes a voice coil. The periphery of the diaphragm is connected to the shell, and the diaphragm is also provided with the through hole. The voice coil is located in the rear sound cavity, and one end of the voice coil is connected to the diaphragm and is arranged around the through hole, and the other end of the voice coil is suspended in the magnetic gap.

5. The sound-generating device according to claim 4, characterized in that: The voice coil is connected to the dome.

6. The sound-generating device according to claim 5, characterized in that: A connecting platform is provided on the periphery of each of the pillars, and the inner folding ring includes a first connecting portion, an inner folding ring portion, and a second connecting portion connected in sequence, the first connecting portion is connected to the connecting platform, and the second connecting portion is connected to the spherical top; A support platform is provided on the inner wall of the shell. The outer folding ring includes an inner fixing portion, an outer folding ring portion and an outer fixing portion connected in sequence. The outer fixing portion is supported and fixed on the support platform. The inner fixing portion is connected to the spherical top.

7. The sound-generating device according to claim 6, characterized in that: The protruding direction of the inner fold ring is consistent with or opposite to the protruding direction of the outer fold ring; And / or, the protruding direction of the inner fold ring is consistent with the facing direction of the connecting platform; And / or, the two voice coils are symmetrically arranged relative to the magnetic circuit system; And / or, the two diaphragms are symmetrically arranged relative to the magnetic circuit system.

8. The sound generating device according to any one of claims 1 to 7, characterized in that: The central magnetic circuit portion includes a first magnetic conductive portion, a magnet, and a second magnetic conductive portion stacked in sequence, and the first magnetic conductive portion and the second magnetic conductive portion are both provided with the support on a side facing away from the magnet; The magnetic circuit system also includes a side magnetic circuit part, which includes a skeleton part and a magnetic conductive side plate. One side of the skeleton part is connected to the shell, and the other side of the skeleton part is connected to the magnetic conductive side plate. The magnetic conductive side plate is located on the outside of the central magnetic circuit part and is spaced from the central magnetic circuit part to form a magnetic gap.

9. The sound-generating device according to claim 8, characterized in that: The skeleton part and the magnetic conductive side plate are an integrally formed structure; And / or, the magnetic conductive side plates include a plurality of magnetic conductive side plates, the plurality of magnetic conductive side plates are arranged at intervals and arranged around the periphery of the central magnetic circuit portion; And / or, the skeleton portion and the magnetic conductive side plate are arranged vertically; And / or, the magnetic conductive side plate is arranged parallel to the peripheral side surface of the central magnetic circuit part.

10. The sound generating device according to any one of claims 1 to 7, characterized in that: The two front sound holes and the rear sound hole are respectively located on opposite sides of the shell, the two front sound holes radiate sound waves with the same phase, and the sound waves radiated by the rear sound hole are opposite in phase to the sound waves radiated by the front sound holes.

11. The sound generating device according to claim 10, characterized in that: The housing comprises: A first housing, comprising a first outer frame and an upper cover, wherein the first outer frame is an annular frame, and the upper cover is connected to one side of the first outer frame and encloses the front sound hole; and A second housing, comprising a second outer frame and a lower cover, wherein the second outer frame is an annular frame, and the lower cover is connected to one side of the second outer frame and encloses the front sound hole; The first outer frame and the second outer frame are butt-jointed to enclose and form the cavity and the rear sound hole communicating with the cavity.

12. A wearable device, characterized in that: It includes an equipment body and a sound-emitting device as described in any one of claims 1 to 11, the sound-emitting device is connected to the equipment body, the equipment body is provided with a first sound outlet and a second sound outlet, the first sound outlet is connected to the front sound hole of the sound-emitting device, and the second sound outlet is connected to the rear sound hole of the sound-emitting device.

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