Sounding device and electronic equipment

Abstract

The invention provides a sound production device and electronic equipment, and the sound production device comprises a basin frame, a vibration system and a magnetic circuit system. The basin stand is provided with a through hole penetrating through the basin stand; the vibrating system comprises a vibrating diaphragm completely covering the through hole, and a first voice coil and a second voice coil which are used for driving the vibrating diaphragm to vibrate along a first direction; the vibrating diaphragm comprises an elastic fixing part, two through holes and two spherical roofs; each dome comprises a first long-axis edge, a first short-axis edge, a second long-axis edge and a second short-axis edge which are sequentially connected end to end, and the first short-axis edge and the second short-axis edge are of an asymmetric structure relative to the connecting line of the midpoint of the first long-axis edge and the midpoint of the second long-axis edge; the first long-axis edges of the two dome tops are located on the same straight line, the second long-axis edges of the two dome tops are located on the same straight line, and the second short-axis edge of one dome top is adjacent to the second short-axis edge of the other dome top. The acoustic performance of the sound production device can be improved.

Description

Technical Field

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

[0002] A sound-generating device is a transducer that converts electrical signals into sound signals. It mainly includes a frame, a vibration system fixed to the frame, and a magnetic circuit system that drives the vibration system to vibrate. The vibration system includes a diaphragm fixed to the frame and a voice coil fixed to the diaphragm and used to drive the diaphragm to vibrate.

[0003] In the sound-generating device of the related technology, the vibration system includes a diaphragm and a voice coil. The diaphragm includes an elastic fixing part fixed to the frame and a dome fixed to the elastic fixing part. Although this design can achieve the effect of vibration and sound generation, since its vibration system only includes a dome with a regular shape and a voice coil, its vibration and sound generation effect is not very good, resulting in poor acoustic performance of the sound-generating device.

[0004] Therefore, it is necessary to provide a new sound-generating device to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a new sound-generating device to solve the problem of poor acoustic performance of sound-generating devices in related technologies.

[0006] In a first aspect, the present invention provides a sound-generating device, which includes a frame, a vibration system and a magnetic circuit system respectively fixed to the frame, wherein the magnetic circuit system is used to drive the vibration system to vibrate along a first direction;

[0007] The frame has a through hole extending through it along the first direction; the vibration system includes a diaphragm fixed to the frame and completely covering the through hole, and a first voice coil and a second voice coil for driving the diaphragm to vibrate along the first direction. The diaphragm includes an elastic fixing part fixed to the frame, two perforations that pass through the elastic fixing part along the first direction and are spaced apart, and two domes fixed to the elastic fixing part, with the two domes completely covering the two perforations respectively; the two domes are arranged at intervals along a second direction perpendicular to the first direction; the first voice coil and the second voice coil are respectively fixed to the side of the two domes close to the magnetic circuit system; Each of the domes includes a first major axis, a first minor axis, a second major axis, and a second minor axis connected end to end. The lines connecting the first minor axis and the second minor axis about the midpoint of the first major axis and the midpoint of the second major axis are asymmetrical. The first major axis sides of the two domes are on the same straight line, the second major axis sides of the two domes are on the same straight line, and the second minor axis side of one dome is adjacent to the second minor axis side of the other dome.

[0008] Preferably, in each of the domes, the first minor axis is arc-shaped, the second minor axis is straight, and the angles formed by the two ends of the second minor axis with the connection points of the first major axis and the second major axis are all chamfered to the first arc angle.

[0009] Preferably, in each of the domes, the first minor axis is straight, and the corners formed by the connections of the two ends of the first minor axis with the first major axis and the second major axis are all chamfered to form a second rounded angle; the second minor axis is straight, and the corners formed by the connections of the two ends of the second minor axis with the first major axis and the second major axis are all chamfered to form a third rounded angle; the radii of the second rounded angle and the third rounded angle are different.

[0010] Preferably, the radius of the second arc angle is greater than the radius of the third arc angle.

[0011] Preferably, the basin stand includes a basin stand body having the through hole and a partition extending from one side of the basin stand body along the second direction to the other side, the partition dividing the through hole into a first through hole and a second through hole; the two domes are respectively located in the first through hole and the second through hole.

[0012] Preferably, the elastic fixing part includes a first fixing part fixed to the basin frame body and in an annular shape, a second fixing part protruding from one side of the first fixing part along the second direction and extending to the other side and fixed to the partition, a first bending part extending from the edge portion of the first fixing part near the first through hole and the edge portion of the second fixing part near the first through hole respectively towards the central axis of the first through hole, a first vibrating part extending from the edge portion of the first bending part near the first through hole towards the central axis of the first through hole, a second bending part extending from the edge portion of the first fixing part near the second through hole and the edge portion of the second fixing part near the second through hole respectively towards the central axis of the second through hole, and a second vibrating part extending from the second bending part towards the central axis of the second through hole. The first vibrating part is annular and forms one of the through holes, and the second vibrating part is annular and forms the other through hole. One of the spherical domes is fixed to the side of the first vibrating part near the magnetic circuit system, and the other spherical dome is fixed to the side of the second vibrating part near the magnetic circuit system.

[0013] Preferably, the side of the basin frame body away from the magnetic circuit system is defined as the first upper sidewall, and the side of the basin frame body near the central axis of the through hole is defined as the first inner sidewall. A portion of the first inner sidewall extends toward the central axis of the through hole to form a first protrusion; the first fixing portion includes a first fitting portion that fits the first protrusion, a first extension portion that extends from one end of the first fitting portion away from the magnetic circuit system toward the first protrusion and fits the first inner sidewall, and a second fitting portion that bends and extends from the first extension portion toward the diaphragm and fits the first upper sidewall, the second fitting portion extending and protruding toward the frame to form a conical protrusion. The first fixing part further includes a second extension that extends from one end of the first fitting part near the magnetic circuit system in a direction away from the first protrusion and fits against the first inner sidewall. The second extension is spaced apart from the first bend or the second bend in a direction perpendicular to the first direction.

[0014] Preferably, the side of the partition away from the magnetic circuit system is defined as the second upper sidewall, the side of the partition near the central axis of the first through hole is defined as the second inner sidewall, and the side of the partition near the central axis of the second through hole is defined as the third inner sidewall; a portion of the second inner sidewall extends towards the central axis of the first through hole to form a second protrusion, and a portion of the third inner sidewall extends towards the central axis of the second through hole to form a third protrusion; The second fixing part includes a third fitting part that is attached to and fixed to the second upper sidewall, a fourth fitting part that bends and extends from the third fitting part toward the direction of the magnetic circuit system and fits the second protrusion, and a third extension part that extends from one end of the fourth fitting part toward the magnetic circuit system toward the direction of the second protrusion. A step is formed between the fourth fitting part and the third extension part, and the third extension part is spaced apart from the first bending part in a direction perpendicular to the first direction. The second fixing part further includes a fifth fitting part that bends and extends from the third fitting part toward the direction of the magnetic circuit system and fits the third protrusion, and a fourth extension part that extends from one end of the fifth fitting part toward the magnetic circuit system toward the direction of the third protrusion. A step is formed between the fifth fitting part and the fourth extension part, and the fourth extension part is spaced apart from the second bending part in a direction perpendicular to the first direction.

[0015] Preferably, the distance between the fourth and fifth fitting portions in the second direction is greater than the distance between the third and fourth extension portions in the second direction.

[0016] Preferably, the first vibration part has a first positioning part extending toward the central axis of the first through hole on each of its four inner peripheral sides near the first through hole; the second vibration part has a second positioning part extending toward the central axis of the second through hole on each of its four inner peripheral sides near the second through hole. The spherical dome located in the first through hole is provided with a first positioning groove recessed in a direction away from the central axis of the first through hole at the position corresponding to the first positioning part, and each first positioning part extends into the corresponding first positioning groove and forms a fixed connection; the spherical dome located in the second through hole is provided with a second positioning groove recessed in a direction away from the central axis of the second through hole at the position corresponding to the second positioning part, and each second positioning part extends into the corresponding second positioning groove and forms a fixed connection.

[0017] Preferably, the length of one of the domes extending along the second direction is greater than the length of the other dome extending along the second direction.

[0018] Secondly, the present invention provides an electronic device including a housing and a sound-emitting device as described above, which is fixed inside the housing. The housing is provided with a sound outlet hole extending through it along a first direction. The shape of the sound outlet hole matches the shape of the through hole, and the sound outlet hole and the through hole are arranged opposite to each other along the first direction.

[0019] Compared with related technologies, the sound-generating device of the present invention increases the effective vibration area of ​​the diaphragm by designing through holes on the frame and designing the diaphragm into a structure including an elastic fixing part, two perforations and two domes, with each dome completely covering one of the perforations, while limiting both domes to irregular vibration structures, thereby improving the acoustic performance of the sound-generating device. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments 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 these drawings without creative effort, wherein: Figure 1 This is a three-dimensional structural schematic diagram of the sound-generating device provided in Embodiment 1 of the present invention; Figure 2 This is an exploded view of the first part of the structure of the sound-generating device provided in Embodiment 1 of the present invention, wherein the exploded view does not include the support frame and the breathable isolation component; Figure 3 This is an exploded view of the second part of the structure of the sound-generating device provided in Embodiment 1 of the present invention; Figure 4 For along Figure 1 Cross-sectional view of line AA in the middle; Figure 5 for Figure 4 A schematic diagram of the structure of part A in the diagram; Figure 6 for Figure 4 A schematic diagram of part B in the diagram; Figure 7 This is an exploded view of the lower clamping plate, the first breathable isolation component, and the second breathable isolation component in the sound-generating device provided in Embodiment 1 of the present invention; Figure 8 This is a first-view exploded view of the frame and diaphragm in the sound-generating device provided in Embodiment 1 of the present invention. Figure 9 This is a second-view exploded view of the frame and diaphragm in the sound-generating device provided in Embodiment 1 of the present invention; Figure 10 This is an exploded view of the diaphragm structure in the sound-generating device provided in Embodiment 1 of the present invention; Figure 11 This is a simplified plan view of the two domes in the sound-generating device provided in Embodiment 2 of the present invention.

[0021] Among them, 100, sound-generating device; 1, basin frame; 10, through hole; 101, first through hole; 102, second through hole; 11, basin frame body; 111, first upper side wall; 112, first inner side wall; 113, first protrusion; 12, partition; 121, second upper side wall; 122, second inner side wall; 123, third inner side wall; 124, second protrusion; 125, third protrusion; 13, mounting part; 131, threaded connection hole; 2, vibration system; 21, diaphragm; 211, elastic fixing part; 2111, first Fixing part; 21111, First fitting part; 21112, First extension part; 21113, Second fitting part; 21114, Conical protrusion; 21115, Second extension part; 2112, Second fixing part; 21121, Third fitting part; 21122, Fourth fitting part; 21123, Third extension part; 21124, Fifth fitting part; 21125, Fourth extension part; 2113, First bending part; 2114, First vibrating part; 21141, First positioning part; 2115, Second bending part; 211 6. Second vibrating part; 21161. Second positioning part; 212. Perforation; 213. Dome; 2131. First long axis side; 2132. First short axis side; 2133. Second long axis side; 2134. Second short axis side; 2135. First positioning groove; 2136. Second positioning groove; 22. First voice coil; 23. Second voice coil; 24. First elastic element; 25. Second elastic element; 3. Magnetic circuit system; 31. Lower clamping plate; 311. First clearance groove; 312. Second clearance groove; 313. First leakage hole; 314. Second leakage hole; 315, clearance groove; 32, magnet assembly; 321, main magnet; 322, auxiliary magnet; 323, pole core; 324, upper clamping plate; 325, center clamping plate; 326, side clamping plate; 4, bracket; 5, first conductive element; 51, first connecting part; 52, second connecting part; 53, third connecting part; 6, second conductive element; 61, fourth connecting part; 62, fifth connecting part; 63, sixth connecting part; 7, support frame; 8, first breathable isolation element; 81, second breathable isolation element; 82, third breathable isolation element. Detailed Implementation

[0022] 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 them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1 This invention provides a sound-generating device 100, combined with... Figures 1 to 10As shown, it includes a basin frame 1, a vibration system 2 and a magnetic circuit system 3 respectively fixed to the basin frame 1, and the magnetic circuit system 3 is used to drive the vibration system 2 to vibrate along a first direction.

[0024] The first direction is Figure 1 or Figure 2 The X-axis is in the middle, and the second direction is... Figure 1 or Figure 2 The Y-axis is perpendicular to the first and second directions; the central axis of the through hole 10 is... Figure 8 The B-axis in the diagram, the central axis of the first through hole 101 is... Figure 8 The C-axis in the middle, the central axis of the second through hole 102 is Figure 8 The D-axis in the diagram.

[0025] The frame 1 extends from both ends along the second direction away from the central axis of the through hole 10 to form mounting portions 13, which are used to fix to the housing of the electronic device. This design allows the sound-generating device 100 to be directly mounted to the electronic device via the mounting portions 13 without the need for a housing.

[0026] The mounting part 13 is provided with a threaded connection hole 131 extending through it in a first direction. The basin holder 1 is fixed to the housing by screws passing through the threaded connection hole 131. Of course, depending on actual needs, the mounting part 13 can also be fixed to the housing by designing a conventional hole structure, a fixing post, or an adhesive surface.

[0027] The frame 1 has a through hole 10 extending through it in a first direction. When the sound-generating device 100 is installed in the housing of the electronic device, the shape of the through hole 10 matches the shape of the sound outlet hole on the housing of the electronic device and is positioned directly opposite it.

[0028] The vibration system 2 includes a diaphragm 21 fixed to the frame 1 and completely covering the through hole 10, and a first voice coil 22 and a second voice coil 23 for driving the diaphragm 21 to vibrate in a first direction.

[0029] The diaphragm 21 includes an elastic fixing part 211 fixed to the frame 1, two perforations 212 that pass through the elastic fixing part 211 along a first direction and are spaced apart, and two domes 213 fixed to the elastic fixing part 211. The two domes 213 completely cover the two perforations 212 respectively. The two domes 213 are arranged at intervals along a second direction perpendicular to the first direction. The first voice coil 22 and the second voice coil 23 are respectively fixed to the side of the two domes 213 that are close to the magnetic circuit system 3.

[0030] Each dome 213 includes a first major axis side 2131, a first minor axis side 2132, a second major axis side 2133, and a second minor axis side 2134 connected end to end. The line connecting the first minor axis side 2132 and the second minor axis side 2134 with respect to the midpoint of the first major axis side 2131 and the midpoint of the second major axis side 2133 (e.g.) Figure 10 The structure is asymmetrical (as shown by the E-axis or F-axis in the diagram); the first minor axis sides 2132 of the two domes 213 have the same shape, and the second minor axis sides 2134 of the two domes 213 have the same shape; the first major axis sides 2131 of the two domes 213 are on the same straight line, and the second major axis sides 2133 of the two domes 213 are on the same straight line.

[0031] By designing the dome 213 of the diaphragm 21 into an irregular shape and driving it through the first voice coil 22 and the second voice coil 23 respectively, the effective vibration area of ​​the diaphragm 21 can be increased, thereby improving the acoustic performance of the sound-generating device 100.

[0032] In this embodiment, the second minor axis side 2134 of one dome 213 is arranged adjacent to the second minor axis side 2134 of the other dome 213.

[0033] In each dome 213, the first minor axis side 2132 is arc-shaped, the second minor axis side 2134 is straight, and the angles formed by the two ends of the second minor axis side 2134 with the first major axis side 2131 and the second major axis side 2133 respectively are all chamfered to the first arc angle.

[0034] The basin frame 1 includes a basin frame body 11 with a through hole 10 and a partition 12 extending from one side of the basin frame body 11 along a second direction to the other side. The partition 12 divides the through hole 10 into a first through hole 101 and a second through hole 102. Two domes 213 are located in the first through hole 101 and the second through hole 102, respectively. This design divides the through hole 10 into a first through hole 101 and a second through hole 102, so that the two domes 213 are located in different first through holes 101 and second through holes 102, thereby forming two different acoustic structures.

[0035] Definitions: The side of the basin frame body 11 away from the magnetic circuit system 3 is the first upper sidewall 111, the side of the basin frame body 11 near the central axis of the through hole 10 is the first inner sidewall 112, the side of the partition 12 away from the magnetic circuit system 3 is the second upper sidewall 121, the side of the partition 12 near the central axis of the first through hole 101 is the second inner sidewall 122, and the side of the partition 12 near the central axis of the second through hole 102 is the third inner sidewall 123.

[0036] The elastic fixing part 211 includes a first fixing part 2111 fixed to the basin stand body 11 and in an annular shape; a second fixing part 2112 protruding from one side of the first fixing part 2111 along a second direction and fixed to the partition 12; a first bending part 2113 extending from the edge portion of the first fixing part 2111 near the first through hole 101 and the edge portion of the second fixing part 2112 near the first through hole 101 respectively towards the central axis of the first through hole 101; a first vibrating part 2114 extending from the edge portion of the first bending part 2113 near the first through hole 101 towards the central axis of the first through hole 101; and a second fixing part 2112 extending from the first fixing part 2111. The second bending portion 2115, which bends towards the central axis of the second through hole 102, and the second vibrating portion 2116, which extends from the second bending portion 2115 towards the central axis of the second through hole 102, are respectively formed by the edge portion of the second through hole 102 and the edge portion of the second fixing portion 2112. The first vibrating portion 2114 is annular and forms one through hole 212, and the second vibrating portion 2116 is annular and forms another through hole 212. One dome 213 is fixed to the side of the first vibrating portion 2114 near the magnetic circuit system 3, and the other dome 213 is fixed to the side of the second vibrating portion 2116 near the magnetic circuit system 3. This design allows the two irregular domes 213 to be better fixed to the elastic fixing portion 211, thereby increasing the effective vibration area of ​​the diaphragm 21.

[0037] A portion of the first inner sidewall 112 extends toward the central axis of the through hole 10 to form a first protrusion 113; the first fixing portion 2111 includes a first fitting portion 21111 that fits the first protrusion 113, a first extension portion 21112 that extends from one end of the first fitting portion 21111 away from the magnetic circuit system 3 away from the first protrusion 113 and fits the first inner sidewall 112, and a second fitting portion 21113 that bends and extends from the first extension portion 21112 away from the diaphragm 21 and fits the first upper sidewall 111.

[0038] The first fixing part 2111 also includes a second extension part 21115 that extends from one end of the first fitting part 21111 near the magnetic circuit system 3 away from the first protrusion 113 and fits against the first inner sidewall 112. The second extension part 21115 is spaced apart from the first bending part 2113 or the second bending part 2115 in a direction perpendicular to the first direction.

[0039] The cooperation between the first fixing part 2111 and the basin stand 1 can increase the fixing area between the first fixing part 2111 and the basin stand body 11, thereby enabling the first fixing part 2111 to be more stably fixed to the basin stand body 11.

[0040] The second fitting portion 21113 extends away from the frame 1 and protrudes to form a tapered protrusion 21114. This design allows the second fitting portion 21113 to be formed in a structure similar to a sealing gasket, so that after the sound-generating device 100 is installed in the housing of the electronic device, it can achieve the effects of sealing, waterproofing and dustproofing.

[0041] A portion of the second inner wall 122 extends toward the central axis of the first through hole 101 to form a second protrusion 124, and a portion of the third inner wall 123 extends toward the central axis of the second through hole 102 to form a third protrusion 125.

[0042] The second fixing part 2112 includes a third fitting part 21121 that is fitted and fixed to the second upper sidewall 121, a fourth fitting part 21122 that extends from the third fitting part 21121 toward the direction close to the magnetic circuit system 3 and fits the second protrusion 124, and a third extension part 21123 that extends from one end of the fourth fitting part 21122 near the magnetic circuit system 3 toward the direction away from the second protrusion 124. A step is formed between the fourth fitting part 21122 and the third extension part 21123. The third extension part 21123 is spaced apart from the first bending part 2113 in the direction perpendicular to the first direction.

[0043] The second fixing part 2112 also includes a fifth fitting part 21124 that bends and extends from the third fitting part 21121 toward the direction close to the magnetic circuit system 3 and fits the third protrusion 125, and a fourth extension part 21125 that extends from the end of the fifth fitting part 21124 near the magnetic circuit system 3 toward the direction away from the third protrusion 125. A step is formed between the fifth fitting part 21124 and the fourth extension part 21125, and the fourth extension part 21125 is spaced apart from the second bending part 2115 in the direction perpendicular to the first direction.

[0044] The distance between the fourth fitting portion 21122 and the fifth fitting portion 21124 in the second direction is greater than the distance between the third extension portion 21123 and the fourth extension portion 21125 in the second direction.

[0045] The design of the basin stand 1 can form a T-shaped structure, and the matching limitation of the second fixing part 2112 can also form a similar T-shaped structure. In this way, the T-shaped structure can increase the fixing contact area between the second fixing part 2112 and the partition 12, so that the second fixing part 2112 can be fixed to the partition 12 more stably.

[0046] The first vibration part 2114 has four first positioning parts 21141 extending towards the central axis of the first through hole 101 on its inner periphery. The dome 213 located within the first through hole 101 has a first positioning groove 2135 recessed away from the central axis of the first through hole 101, corresponding to the position of the first positioning part 21141. Each first positioning part 21141 extends into its corresponding first positioning groove 2135 and forms a fixed connection. This design increases the fixing area between the dome 213 and the first vibration part 2114, thus allowing the dome 213 to be more stably fixed to the first vibration part 2114.

[0047] The thickness of the first positioning part 21141 along the first direction is greater than the thickness of the remaining parts of the first vibration part 2114 along the first direction. This design can further increase the fixing area of ​​the dome 213 fixed to the first vibration part 2114 and the first vibration part 2114, and at the same time improve the overall mass of the first vibration part 2114, so that the vibration effect of the diaphragm 21 is better.

[0048] The second vibration part 2116 has four second positioning parts 21161 extending towards the central axis of the second through hole 102 on its inner peripheral side. The dome 213 located within the second through hole 102 has a second positioning groove 2136 recessed away from the central axis of the second through hole 102, corresponding to the second positioning parts 21161. Each second positioning part 21161 extends into its corresponding second positioning groove 2136 and forms a fixed connection. This design increases the fixing area between the dome 213 and the second vibration part 2116, thus allowing the dome 213 to be more stably fixed to the second vibration part 2116.

[0049] The thickness of the second positioning part 21161 along the first direction is greater than the thickness of the other parts of the second vibration part 2116 along the first direction. This design can further increase the fixed area of ​​the dome 213 fixed to the second vibration part 2116 and the second vibration part 2116, and at the same time improve the overall quality of the second vibration part 2116, so that the vibration effect of the diaphragm 21 is better.

[0050] One of the domes 213 is fixed to the side of the first vibrating part 2114 near the magnetic circuit system 3, and the other dome 213 is fixed to the side of the second vibrating part 2116 near the magnetic circuit system 3. The length of one dome 213 along the second direction is greater than the length of the other dome 213 along the second direction, and the longer dome 213 is closer to the magnetic circuit system 3 than the other dome 213. The first voice coil 22 is fixed to the longer dome 213. Because the longer dome 213 has a relatively larger area, it is closer to the magnetic circuit system 3 than the other dome 213, thus reducing its height and ensuring sufficient driving force for the first voice coil 22 when working with the magnetic circuit system 3. Conversely, because the shorter dome 213 has a relatively smaller area, it needs to be further away from the magnetic circuit system 3 than the other dome 213 to increase its height, providing sufficient installation space for this part of the magnetic circuit system 3 and ensuring sufficient driving force for the second voice coil 23 when working with the magnetic circuit system 3. Furthermore, this design allows the sound-generating device 100 to simultaneously emit low and high frequencies. The longer dome 213 section is used to emit low-frequency sounds with a larger amplitude and a larger vibrating part, while the shorter dome 213 section is used to emit high-frequency sounds with a smaller amplitude and a smaller vibrating part.

[0051] The vibration system 2 also includes two first elastic elements 24 fixed to both ends of the first voice coil 22 along the second direction and electrically connected to the first voice coil 22, and two second elastic elements 25 fixed to both ends of the second voice coil 23 along the second direction and electrically connected to the second voice coil 23. This design allows electrical signals to be introduced into the first voice coil 22 through the first elastic elements 24 and into the second voice coil 23 through the second elastic elements 25.

[0052] The magnetic circuit system 3 includes a lower clamping plate 31 fixed to the side of the frame 1 away from the vibration system 2, and two magnet assemblies 32 stacked and fixed to the lower clamping plate 31 and spaced apart from each other. Each magnet assembly 32 includes a main magnet 321, a secondary magnet 322 arranged around the main magnet 321 and spaced apart from the main magnet 321 to form a magnetic gap, a pole core 323 stacked and fixed to the side of the main magnet 321 away from the lower clamping plate 31, and an upper clamping plate 324 stacked and fixed to the side of the secondary magnet 322 away from the lower clamping plate 31. The first voice coil 22 and the second voice coil 23 are respectively inserted and suspended in the magnetic gap between the two magnet assemblies 32. This design can form two acoustic systems with the diaphragm 21 and improve the magnetic effect of the magnetic circuit assembly.

[0053] Each magnet assembly 32 includes two auxiliary magnets 322, which are respectively located on opposite sides of the main magnet 321 along the second direction.

[0054] In this embodiment, the magnet assembly 32, which is positioned directly opposite the longer dome 213, further includes a central clamping plate 325 stacked and fixed to the side of the pole core 323 away from the main magnet 321, and side clamping plates 326 stacked and fixed to the side of the upper clamping plate 324 away from the secondary magnet 322. The upper clamping plate 324 of the magnet assembly 32 comprises two plates, each fixed to the side of the two secondary magnets 322 away from the lower clamping plate 31. This design enhances the magnetic effect of the magnet assembly 32.

[0055] Another magnet assembly 32 has an upper clamping plate 324 that is ring-shaped and stacked and fixed to the side of each of the two auxiliary magnets 322 away from the lower clamping plate 31.

[0056] The lower clamping plate 31 is recessed on the side near the vibration system 2, forming a first clearance groove 311 in the direction away from the vibration system 2; the first voice coil 22 is directly opposite the first clearance groove 311 along the first direction. This design can provide clearance space for the first voice coil 22 to vibrate along the first direction, thereby reducing the height space of the sound generating device 100 along the first direction.

[0057] The lower clamping plate 31 is recessed on the side near the vibration system 2, forming two spaced second clearance grooves 312 in the direction away from the vibration system 2; the two first elastic members 24 are respectively arranged facing the two second clearance grooves 312 along the first direction. This design can provide clearance space for the first elastic members 24 to vibrate along the first direction, thereby reducing the height space of the sound generating device 100 along the first direction.

[0058] The second clearance groove 312 is connected to the first clearance groove 311, and the recess depth of the second clearance groove 312 is the same as the recess depth of the first clearance groove 311. This design can reduce the recessed area on the lower clamping plate 31, thereby improving the structural strength of the lower clamping plate 31 and facilitating the processing and manufacturing of the lower clamping plate 31.

[0059] The lower clamping plate 31 is provided with two first leakage holes 313 and one second leakage hole 314 that run through it along a first direction and are spaced apart from each other. The two first leakage holes 313 are respectively located in two second clearance grooves 312, and the second leakage hole 314 is located within the range of the second through hole 102 along the first direction. The sound-generating device 100 also includes two first ventilating isolation members 8 and one second ventilating isolation member 81 that are fixed to the side of the lower clamping plate 31 away from the vibration system 2. The two first ventilating isolation members 8 cover the two first leakage holes 313 respectively, and the second ventilating isolation member 81 covers the second leakage hole 314. This design can provide leakage and ventilation effects for the inner cavity of the sound-generating device 100 to balance the internal and external sound of the sound-generating device 100, thereby improving its acoustic performance. It can also dissipate heat for the first voice coil 22 and the second voice coil 23. In addition, the first ventilating isolation members 8 and the second ventilating isolation members 81 can achieve waterproof and dustproof effects.

[0060] The sound-generating device 100 also includes a bracket 4 fixed between the frame 1 and the lower clamping plate 31. An upper clamping plate 324 is embedded in the bracket 4 so that the upper clamping plate 324 and the bracket 4 form an integral structure. The frame 1, the vibration system 2, the lower clamping plate 31, and the bracket 4 work together to enclose the two magnet components 32 and separate them. This design can avoid mutual interference between the magnetic fields of the two magnet components 32. Designing the upper clamping plate 324 and the bracket 4 as an integral structure can improve the fixing effect of the upper clamping plate 324, reduce assembly steps, improve assembly accuracy, and isolate the internal cavity of the sound-generating device 100 from the outside world to achieve waterproof and dustproof effects, thereby preventing impurities from interfering with the internal magnetic circuit system 3 and the vibration system 2.

[0061] The sound-generating device 100 also includes two first conductive elements 5 and two second conductive elements 6 embedded in the bracket 4 at intervals along a second direction; each first conductive element 5 includes a first connecting portion 51 fixed to one of the first elastic elements 24, a second connecting portion 52 fixed to the side of the bracket 4 away from the vibration system 2, and a third connecting portion 53 connecting the first connecting portion 51 and the second connecting portion 52, and each first conductive element 5 is electrically connected to the first elastic element 24 to which it is connected; each second conductive element 6 includes a fourth connecting portion 61 fixed to one of the second elastic elements 25, a fifth connecting portion 62 fixed to the side of the bracket 4 away from the vibration system 2, and a sixth connecting portion 63 connecting the fourth connecting portion 61 and the fifth connecting portion 62, and each second conductive element 6 is electrically connected to the second elastic element 25 to which it is connected; the second connecting portion 52 in each first conductive element 5 and the fifth connecting portion 62 in each second conductive element 6 are exposed outside the bracket 4, that is, the second connecting portion 52 in each first conductive element 5 and the fifth connecting portion 62 in each second conductive element 6 are exposed outside the bracket 4 of the sound-generating device 100. This design allows for better introduction of electrical signals to the first voice coil 22 via the first conductive element 5, and better introduction of electrical signals to the second voice coil 23 via the second conductive element 6.

[0062] One end of each first elastic element 24 is fixed to the first voice coil 22, and the other end is fixed to the first connecting part 51; one end of each second elastic element 25 is fixed to the second voice coil 23, and the other end is fixed to the fourth connecting part 61.

[0063] The lower clamping plate 31 is formed with relief grooves 315 penetrating therethrough along the first direction corresponding to the positions of the second connecting portions 52 in each of the first conductive members 5 and the fifth connecting portions 62 in each of the second conductive members 6; the second connecting portions 52 in each of the first conductive members 5 are respectively located in the corresponding relief grooves 315, and the fifth connecting portions 62 in each of the second conductive members 6 are respectively located in the corresponding relief grooves 315. Such a design can better expose the second connecting portions 52 in each of the first conductive members 5 and the fifth connecting portions 62 in each of the second conductive members 6 outside the bracket of the sound generating device 100 without increasing the volume of the sound generating device 100.

[0064] The sound generating device 100 further includes a support frame 7 covering and fixed to the sides of the first fixing portion 2111 and the second fixing portion 2112 away from the magnetic circuit system 3 respectively, and a third air-permeable isolation member 82 fixed to the side of the support frame 7 away from the magnetic circuit system 3. Such a design can provide a waterproof and dustproof effect for the through holes 10.

[0065] The support frame 7 is in an eye shape along the second direction. In this way, the support frame 7 can better support the third air-permeable isolation member 82 and prevent the third air-permeable isolation member 82 from collapsing and affecting the vibration of the vibration system 2.

[0066] Compared with the related art, in the sound generating device 100 of this embodiment, by designing through holes 10 on the basin frame 1, the vibrating diaphragm 21 is designed into a structure including an elastic fixing portion 211, two through holes 212 and two dome portions 213, and each dome portion 213 completely covers one of the through holes 212, and at the same time, the two dome portions 213 are both defined as irregular vibration structures, so as to increase the effective vibration area of the vibrating diaphragm 21 and further improve the acoustic performance of the sound generating device 100.

[0067] Embodiment Two Different from Embodiment One, as shown in combination Figure 11 In each dome portion 213 of this embodiment, the first short axis side 2132 is linear, and the corners formed at the connections of the two ends of the first short axis side 2132 with the first long axis side 2131 and the second long axis side 2133 are both chamfered into second circular arcs, the second short axis is linear, and the corners formed at the connections of the two ends of the second short axis side 2134 with the first long axis side 2131 and the second long axis side 2133 are both chamfered into third circular arcs; the radii of the second circular arc and the third circular arc are different.

[0068] In this embodiment, the radius R2 of the second circular arc is greater than the radius R3 of the third circular arc.

[0069] This embodiment only changes the shape of the first short axis side 2132, so the technical effects achieved are the same as those achieved in Embodiment One and will not be elaborated here.

[0070] Example 3 This embodiment provides an electronic device, which includes a housing and a sound-generating device fixed inside the housing. The housing has a sound outlet hole extending through it in a first direction. The shape of the sound outlet hole matches the shape of the through hole 10, and the sound outlet hole and the through hole 10 are directly opposite each other in the first direction.

[0071] The sound-generating device in this embodiment is the sound-generating device 100 of Embodiment 1 or Embodiment 2.

[0072] Since the electronic device in this embodiment includes the sound-generating device 100 in Embodiment 1 or Embodiment 2, it can also achieve the technical effect achieved by the sound-generating device 100 in Embodiment 1 or Embodiment 2, which will not be elaborated here.

[0073] The above are merely embodiments of the present invention. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements all fall within the protection scope of the present invention.

Claims

1. A sound-generating device, comprising a frame, a vibration system and a magnetic circuit system respectively fixed to the frame, the magnetic circuit system being used to drive the vibration system to vibrate along a first direction; characterized in that, The frame has a through hole extending through it along the first direction; the vibration system includes a diaphragm fixed to the frame and completely covering the through hole, and a first voice coil and a second voice coil for driving the diaphragm to vibrate along the first direction. The diaphragm includes an elastic fixing part fixed to the frame, two perforations that pass through the elastic fixing part along the first direction and are spaced apart, and two domes fixed to the elastic fixing part, with the two domes completely covering the two perforations respectively; the two domes are arranged at intervals along a second direction perpendicular to the first direction; the first voice coil and the second voice coil are respectively fixed to the side of the two domes close to the magnetic circuit system; Each of the domes includes a first major axis, a first minor axis, a second major axis, and a second minor axis connected end to end. The lines connecting the first minor axis and the second minor axis about the midpoint of the first major axis and the midpoint of the second major axis are asymmetrical. The first major axis sides of the two domes are on the same straight line, the second major axis sides of the two domes are on the same straight line, and the second minor axis side of one dome is adjacent to the second minor axis side of the other dome.

2. The sound-generating device as described in claim 1, characterized in that, In each of the domes, the first minor axis is arc-shaped, the second minor axis is straight, and the angles formed by the two ends of the second minor axis with the connection points of the first major axis and the second major axis are all chamfered to the first arc angle.

3. The sound-generating device as described in claim 1, characterized in that, In each of the domes, the first minor axis is straight, and the corners formed by the connections of the two ends of the first minor axis with the first major axis and the second major axis are all chamfered to form a second rounded angle. The second minor axis is straight, and the corners formed by the connections of the two ends of the second minor axis with the first major axis and the second major axis are all chamfered to form a third rounded angle. The radii of the second rounded angle and the third rounded angle are different.

4. The sound-generating device as described in claim 3, characterized in that, The radius of the second arc angle is greater than the radius of the third arc angle.

5. The sound-generating device as described in claim 1, characterized in that, The basin stand includes a basin stand body with the through hole and a partition extending from one side of the basin stand body along the second direction to the other side, the partition dividing the through hole into a first through hole and a second through hole; the two domes are respectively located in the first through hole and the second through hole.

6. The sound-generating device as described in claim 5, characterized in that, The elastic fixing part includes a first fixing part fixed to the basin frame body and in an annular shape; a second fixing part protruding from one side of the first fixing part along the second direction and extending to the other side and fixed to the partition; a first bending part extending from the edge portion of the first fixing part near the first through hole and the edge portion of the second fixing part near the first through hole respectively towards the central axis of the first through hole; a first vibrating part extending from the edge portion of the first bending part near the first through hole towards the central axis of the first through hole; a second bending part extending from the edge portion of the first fixing part near the second through hole and the edge portion of the second fixing part near the second through hole respectively towards the central axis of the second through hole; and a second vibrating part extending from the second bending part towards the central axis of the second through hole. The first vibrating part is annular and forms one of the through holes, and the second vibrating part is annular and forms the other through hole. One of the spherical domes is fixed to the side of the first vibrating part near the magnetic circuit system, and the other spherical dome is fixed to the side of the second vibrating part near the magnetic circuit system.

7. The sound-generating device as described in claim 6, characterized in that, The side of the basin frame body away from the magnetic circuit system is defined as the first upper sidewall, and the side of the basin frame body near the central axis of the through hole is defined as the first inner sidewall. A portion of the first inner sidewall extends toward the central axis of the through hole to form a first protrusion; the first fixing portion includes a first fitting portion that fits the first protrusion, a first extension portion that extends from one end of the first fitting portion away from the magnetic circuit system toward the first protrusion and fits the first inner sidewall, and a second fitting portion that bends and extends from the first extension portion toward the diaphragm and fits the first upper sidewall, the second fitting portion extending and protruding toward the frame to form a conical protrusion. The first fixing part further includes a second extension that extends from one end of the first fitting part near the magnetic circuit system in a direction away from the first protrusion and fits against the first inner sidewall. The second extension is spaced apart from the first bend or the second bend in a direction perpendicular to the first direction.

8. The sound-generating device as described in claim 6, characterized in that, The side of the partition away from the magnetic circuit system is defined as the second upper sidewall, the side of the partition near the central axis of the first through hole is defined as the second inner sidewall, and the side of the partition near the central axis of the second through hole is defined as the third inner sidewall; a portion of the second inner sidewall extends towards the central axis of the first through hole to form a second protrusion, and a portion of the third inner sidewall extends towards the central axis of the second through hole to form a third protrusion; The second fixing part includes a third fitting part that is attached to and fixed to the second upper sidewall, a fourth fitting part that bends and extends from the third fitting part toward the direction of the magnetic circuit system and fits the second protrusion, and a third extension part that extends from one end of the fourth fitting part toward the magnetic circuit system toward the direction of the second protrusion. A step is formed between the fourth fitting part and the third extension part, and the third extension part is spaced apart from the first bending part in a direction perpendicular to the first direction. The second fixing part further includes a fifth fitting part that bends and extends from the third fitting part toward the direction of the magnetic circuit system and fits the third protrusion, and a fourth extension part that extends from one end of the fifth fitting part toward the magnetic circuit system toward the direction of the third protrusion. A step is formed between the fifth fitting part and the fourth extension part, and the fourth extension part is spaced apart from the second bending part in a direction perpendicular to the first direction.

9. The sound-generating device as described in claim 8, characterized in that, The distance between the fourth and fifth fitting portions in the second direction is greater than the distance between the third and fourth extension portions in the second direction.

10. The sound-generating device as described in claim 6, characterized in that, The first vibration part has a first positioning part extending towards the central axis of the first through hole on each of its four inner peripheral sides near the first through hole; the second vibration part has a second positioning part extending towards the central axis of the second through hole on each of its four inner peripheral sides near the second through hole. The spherical dome located in the first through hole is provided with a first positioning groove recessed in a direction away from the central axis of the first through hole at the position corresponding to the first positioning part, and each first positioning part extends into the corresponding first positioning groove and forms a fixed connection; the spherical dome located in the second through hole is provided with a second positioning groove recessed in a direction away from the central axis of the second through hole at the position corresponding to the second positioning part, and each second positioning part extends into the corresponding second positioning groove and forms a fixed connection.

11. An electronic device, characterized in that, The electronic device includes a housing and a sound-generating device as described in any one of claims 1 to 10, which is fixed inside the housing. The housing has a sound-emitting hole extending through it along the first direction. The shape of the sound-emitting hole matches the shape of the through hole, and the sound-emitting hole and the through hole are directly opposite each other along the first direction.

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