Sound production apparatus and electronic device

Abstract

The present invention relates to the technical field of acoustic energy conversion. Disclosed are a sound production apparatus and an electronic device. The sound production apparatus comprises a magnetic circuit system, a first vibration system, a second vibration system, and a housing; the magnetic circuit system is provided with a first magnetic gap and a second magnetic gap; the first vibration system comprises a first annular diaphragm and a first voice coil; the second vibration system comprises a second diaphragm and a second voice coil; the height of the first annular diaphragm is not higher than the height of the top surface of the magnetic circuit system; the housing and the first vibration system define a first sound cavity; a side wall of the housing is provided with a first side sound hole in communication with the first sound cavity; the housing and the second vibration system also define a second sound cavity independent of the first sound cavity; and the side wall of the housing is further provided with a second side sound hole in communication with the second sound cavity. By providing two side sound holes on the housing, the overall thickness of the sound production apparatus can be made thinner.

Description

Sound production device and electronic device TECHNICAL FIELD

[0001] The present application relates to the technical field of sound energy conversion, in particular to a sound production device and an electronic device. BACKGROUND

[0002] In recent years, with the rapid development of the intelligent terminal electronic field, various electronic devices (such as mobile phones, earphones, tablet computers, etc.) gradually appear new trends such as miniaturization, thinness, and intelligence. Consumers also have higher and higher requirements for the loudspeakers in electronic devices, and miniaturized, high-performance, and high-quality loudspeakers gradually become mainstream demands.

[0003] At present, following the development direction of miniaturization and high performance of loudspeakers, conventional double-sided loudspeakers have been unable to continue to increase the size to improve performance to meet the needs of consumers, and the miniaturization trend of electronic devices further compresses the space size of the internal loudspeaker, resulting in that the existing loudspeakers cannot be successfully installed due to the large size. SUMMARY

[0004] The main purpose of the present application is to provide a sound production device and an electronic device, which aims to solve how to further reduce the size of the loudspeaker.

[0005] To achieve the above-mentioned purpose, the sound production device provided by the present application comprises:

[0006] A magnetic circuit system, the magnetic circuit system comprises a magnet assembly, the magnet assembly comprises a center magnetic circuit and a side magnet arranged around the periphery of the center magnetic circuit, the center magnetic circuit and the side magnet form a first magnetic gap, and the center magnetic circuit forms a second magnetic gap;

[0007] A first vibration system, the first vibration system comprises a first annular diaphragm and a first voice coil connected to each other, and the first voice coil is arranged corresponding to the first magnetic gap;

[0008] A second vibration system, the second vibration system comprises a second diaphragm and a second voice coil connected to each other, and the second voice coil is arranged corresponding to the second magnetic gap; the first vibration system and the second vibration system are arranged on both sides of the magnetic circuit system along the vibration direction;

[0009] A housing, the housing can accommodate the magnetic circuit system, the first vibration system and the second vibration system, the height of the first annular diaphragm is not higher than the height of the top surface of the magnetic circuit system, so that the housing and the first vibration system form a first sound cavity, the side wall of the housing is provided with a first side sound hole communicating with the first sound cavity, and the housing also forms a second sound cavity independent of the first sound cavity with the second vibration system, and the side wall of the housing is also provided with a second side sound hole communicating with the second sound cavity.

[0010] In an embodiment, a top surface of the center magnetic circuit is provided with a first protruding portion, the first protruding portion is in abutment with the shell, the first annular diaphragm is arranged around the first protruding portion, and a height of a top surface of the first annular diaphragm is not higher than a height of a top surface of the first protruding portion.

[0011] In an embodiment, the shell comprises a shell body and a first metal sheet connected to each other, the shell body and the first metal sheet enclose a receiving cavity capable of accommodating the magnetic circuit system, the first vibration system and the second vibration system, a top surface of the center magnetic circuit is in abutment with the first metal sheet after passing through an inner hole of the first annular diaphragm, and a side wall of the shell body is provided with the first side sound hole and the second side sound hole.

[0012] In an embodiment, the second diaphragm comprises a second annular diaphragm.

[0013] The shell is provided with a second protruding portion on a side facing the second annular diaphragm, the second protruding portion is in abutment with a bottom surface of the center magnetic circuit, and the second annular diaphragm is arranged around the second protruding portion.

[0014] Or,

[0015] The bottom surface of the center magnetic circuit is provided with a second protruding portion, the second protruding portion is in abutment with the shell, and the second annular diaphragm is arranged around the second protruding portion.

[0016] In an embodiment, the shell comprises a shell body and a second metal sheet connected to each other, the second metal sheet is protruded to form a second protruding portion on a side facing the second annular diaphragm, the second protruding portion passes through an inner hole of the second annular diaphragm and is in abutment with a bottom surface of the center magnetic circuit, and a side wall of the shell body is provided with the first side sound hole and the second side sound hole.

[0017] In an embodiment, an outer edge of a top surface of the magnetic circuit system is provided with a first mounting groove, and an inner peripheral edge of a side of the first annular diaphragm facing the second vibration system is connected to a bottom wall of the first mounting groove.

[0018] In an embodiment, the sound generating device comprises a first working state and a second working state, in the first working state, the first vibration system and the second vibration system radiate sound waves of the same phase outward, and in the second working state, the first vibration system and the second vibration system radiate sound waves of opposite phases outward.

[0019] In an embodiment, the first ring-shaped vibrating diaphragm is sequentially provided with a first inner folding ring and a first outer folding ring from inside to outside, the first vibrating system comprises a first ball top, the first ball top is connected with the first ring-shaped vibrating diaphragm, and the first ball top is located between the first inner folding ring and the first outer folding ring, and the first voice coil is fixed to the first ball top.

[0020] The second vibrating diaphragm is sequentially provided with a second inner folding ring and a second outer folding ring from inside to outside, the second vibrating system comprises a second ball top, the second ball top is connected with the second vibrating diaphragm, and the second ball top is located between the second inner folding ring and the second outer folding ring, and the second voice coil is fixed to the second ball top.

[0021] In an embodiment, the first inner folding ring is convexly arranged away from the second vibrating diaphragm, and the first outer folding ring is convexly arranged towards the second vibrating diaphragm; the second inner folding ring is convexly arranged away from the first ring-shaped vibrating diaphragm, and the second outer folding ring is convexly arranged towards the first ring-shaped vibrating diaphragm.

[0022] In an embodiment, the center magnetic circuit comprises a center magnet, a secondary center magnet, and a first auxiliary magnet, the secondary center magnet is annularly arranged outside the center magnet and spaced to form the second magnetic gap, the side magnet is annularly arranged outside the secondary center magnet and spaced to form the first magnetic gap, and the inner periphery of the side of the first ring-shaped vibrating diaphragm towards the second vibrating diaphragm is connected with the first auxiliary magnet.

[0023] In an embodiment, the magnetic circuit system further comprises a magnetic plate assembly, the magnetic plate assembly comprises a first magnetic plate and a second magnetic plate, the center magnet and the secondary center magnet away from the side of the first ring-shaped vibrating diaphragm are connected with the first magnetic plate, and the other side of the first magnetic plate is connected with the first auxiliary magnet; the secondary center magnet and the side magnet towards the side of the first ring-shaped vibrating diaphragm are connected with the second magnetic plate.

[0024] In an embodiment, the magnetic circuit system further comprises a magnetic plate assembly, the magnetic plate assembly comprises a first magnetic plate and a second magnetic plate, the center magnet and the secondary center magnet away from the side of the first ring-shaped vibrating diaphragm are connected with the first magnetic plate, and the other side of the first magnetic plate is connected with the first auxiliary magnet; the secondary center magnet and the side magnet towards the side of the first ring-shaped vibrating diaphragm are connected with the second magnetic plate.

[0025] In an embodiment, the magnetic plate assembly further comprises a third magnetic plate and a side magnetic plate, the third magnetic plate is arranged between the second auxiliary magnet and the center magnet, and the side of the side magnet close to the first ring-shaped vibrating diaphragm is connected with the side magnetic plate.

[0026] In an embodiment, the first sub-magnet has a dimension in at least one of the first direction and the second direction in a horizontal plane that is smaller than a dimension of the center magnet in the corresponding direction.

[0027] In an embodiment, the second sub-magnet has a dimension in the first direction in a horizontal plane that is larger than a dimension of the center magnet in the first direction, and a dimension in the second direction in a horizontal plane that is larger than a dimension of the center magnet in the second direction.

[0028] In an embodiment, the sound generating device further comprises a spacer provided with a plurality of air-permeable holes, the spacer being arranged around the outer periphery of the side magnet and connected with the side magnet.

[0029] In an embodiment, the first ring-shaped diaphragm is provided with a first conductive layer, the first conductive layer being electrically connected with the first voice coil and the pad, respectively.

[0030] and / or,

[0031] the second diaphragm is provided with a second conductive layer, the second conductive layer being electrically connected with the second voice coil and the pad, respectively.

[0032] In an embodiment, the first magnetic gap and the second magnetic gap are arranged in a horizontal direction.

[0033] The present application also provides an electronic device comprising a housing and the sound generating device.

[0034] The technical solution of the present application realizes double-side sound emission by using a housing, so that the overall thickness of the sound generating device can be made thinner, and the sound generating device is suitable for use in a scenario with smaller installation space. For example, for a super-thin mobile phone, the installation space of the sound generating device is limited, and therefore, the double-side sound emission sound generating device can better meet the use requirements of the scenario. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from the structures shown in the drawings without creative labor.

[0036] Fig. 1 is a structural schematic view of an embodiment of a sound generating device provided by the present application and configured with a housing;

[0037] Fig. 2 is a structural schematic view of another view of Fig. 1;

[0038] Fig. 3 is an exploded structural schematic view of an embodiment of the sound production device provided by the present application and configured with a shell;

[0039] Fig. 4 is a cross-sectional structural schematic view of an embodiment of the sound production device provided by the present application and configured with a shell;

[0040] Fig. 5 is a cross-sectional structural schematic view of another embodiment of the sound production device provided by the present application and configured with a shell;

[0041] Fig. 6 is a structural schematic view of an embodiment of the sound production device provided by the present application and not assembled with a shell;

[0042] Fig. 7 is a structural schematic view of another perspective of Fig. 6;

[0043] Fig. 8 is a structural schematic view of an embodiment of the first annular diaphragm provided by the present application;

[0044] Fig. 9 is a structural schematic view of an embodiment of the second annular diaphragm provided by the present application;

[0045] Fig. 10 is a structural schematic view of an embodiment of the connection between the second sub-magnet and the second annular diaphragm provided by the present application.

[0046] Brief Description of the Drawings: 100, sound production device; 1, magnetic circuit system; 11, magnet assembly; 111, center magnet; 112, sub-center magnet; 113, edge magnet; 1131, fourth fixed part; 114, first sub-magnet; 1141, first mounting slot; 1142, first protruding part; 115, second sub-magnet; 116, first magnetic gap; 117, second magnetic gap; 12, magnetic conductive plate assembly; 121, first magnetic conductive plate; 122, second magnetic conductive plate; 123, third magnetic conductive plate; 124, edge magnetic conductive plate; 2, first vibration system; 21, first annular diaphragm; 211, first inner folding ring; 212, first outer folding ring; 213, first conductive layer; 22, first voice coil; 23, first ball top; 3, second vibration system; 31, second annular diaphragm; 31A, second diaphragm; 311, second inner folding ring; 312, second outer folding ring; 313, second conductive layer; 32, second voice coil; 33, second ball top; 41, first annular mounting frame; 42, second annular mounting frame; 5, isolation piece; 51, air hole; 6, shell; 61, first sound cavity; 62, second sound cavity; 63, first side sound hole; 64, second side sound hole; 65, shell body; 651, first shell; 652, second shell; 66, first metal sheet; 66A, first steel sheet; 661, first protrusion; 67, second metal sheet; 67A, second steel sheet; 671, second protruding part.

[0047] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0049] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0050] In addition, if the embodiments of the present application involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person of ordinary skill in the art can realize it, and when the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection claimed by the present application.

[0051] In recent years, with the rapid development of the field of intelligent terminal electronics, various electronic devices (such as mobile phones, earphones, tablet computers, etc.) gradually appear new trends such as miniaturization, thinness, and intelligence. Consumers' requirements for speakers in electronic devices are also increasingly high, and miniaturized, high-performance, and high-quality speakers gradually become mainstream demand. At present, following the development direction of miniaturization and high performance of speakers, conventional double-sided speakers have been unable to continue to improve performance by increasing the size to meet the needs of consumers, and the miniaturization trend of electronic devices further compresses the internal speaker space size, resulting in that the existing speakers cannot be successfully installed due to the large size.

[0052] Therefore, the present application provides a sound generating device.

[0053] Referring to FIGS. 1-4, in an embodiment of the present application, the sound generating device 100 includes a magnetic circuit system 1, a first vibration system 2, a second vibration system 3, and a housing 6. The magnetic circuit system 1 includes a magnet assembly 11, which includes a center magnetic circuit and a peripheral magnet 113 surrounding the center magnetic circuit. The center magnetic circuit and the peripheral magnet 113 form a first magnetic gap 116. The center magnetic circuit forms a second magnetic gap 117. The first vibration system 2 includes a first annular diaphragm 21 and a first voice coil 22 connected to each other. The first voice coil 22 is arranged corresponding to the first magnetic gap 116, i.e., the first voice coil 22 is at least partially inserted into the first magnetic gap 116. The second vibration system 3 includes a second diaphragm 31A and 32 and a second voice coil connected to each other. The second voice coil 32 is arranged corresponding to the second magnetic gap 117, i.e., the second voice coil 32 is at least partially inserted into the second magnetic gap 117. The first vibration system 2 and the second vibration system 3 are arranged on both sides of the magnetic circuit system 1 along the vibration direction. The housing 6 can accommodate the magnetic circuit system 1, the first vibration system 2, and the second vibration system 3. The height of the first annular diaphragm 21 is not higher than the height of the top surface of the magnetic circuit system 1, so that the housing 6 and the first vibration system 2 form a first sound cavity 61. The side wall of the housing 6 is provided with a first side sound hole 63 communicating with the first sound cavity 61. The housing 6 and the second vibration system 3 form a second sound cavity 62 independent of the first sound cavity 61. The side wall of the housing 6 is also provided with a second side sound hole 64 communicating with the second sound cavity 62. In the present application, the first side sound hole 63 and the second side sound hole 64 can be located on the same side wall of the sound generating device 100, or can be located on different side walls of the sound generating device 100.

[0054] The technical scheme of the present application realizes double-side sound output by using the housing 6, so that the sound generating device 100 not only meets the demand of double-side sound output use scenario, i.e., the sound generating device 100 can adapt to the ultra-thin whole machine structure with only side sound pipeline, but also eliminates the front cover component compared with the sound generating device 100 with front sound and side sound, so that the overall thickness of the sound generating device 100 can be made thinner. Since it is double-side sound output, the sound cavity and the sound hole can be designed to extend along the horizontal direction, so that the thickness of the double-side sound output sound generating device 100 can be made thinner compared with the sound cavity and the sound hole extending along the vertical direction. Taking a mobile phone as an example, the installation space of the sound generating device 100 of the ultra-thin mobile phone is limited. Therefore, the double-side sound output sound generating device 100 can better adapt to the use demand of this scenario.

[0055] In an embodiment, the top surface of the center magnetic circuit is provided with a first protruding portion 1142, the first protruding portion 1142 abuts against the shell 6, the first annular diaphragm 21 is arranged around the first protruding portion 1142, and the height of the top surface of the first annular diaphragm 21 is not higher than the height of the top surface of the first protruding portion 1142. The inner wall of the shell 6 abuts against the top surface of the first protruding portion 1142, and the inner wall of the shell 6 is also connected with the side wall of the magnetic circuit system 1, thereby improving the stability of the magnetic circuit system 1. The height of the top surface of the first annular diaphragm 21 is not higher than the height of the top surface of the first protruding portion 1142, which ensures that the first annular diaphragm 21 has a vibration space, so that the shell 6 and the first vibration system 2 enclose the first sound cavity 61. Compared with the diaphragm located on the top of the center magnetic circuit, the height of the first annular diaphragm 21 is lower, so that the sound production device 100 can be made thinner, that is, the size of the sound production device 100 in the up-down direction shown in FIG. 1 is reduced. It should be noted that the volume of the center magnetic circuit is increased by providing the first protruding portion 1142, thereby improving the performance of the sound production device 100.

[0056] Please refer to FIGS. 3 to 5. In an embodiment, the shell 6 includes a shell body 65 and a first metal sheet 66 connected with each other, the shell body 65 and the first metal sheet 66 enclose a receiving cavity capable of accommodating the magnetic circuit system 1, the first vibration system 2 and the second vibration system 3, and the top surface of the center magnetic circuit abuts against the first metal sheet 66 after passing through the inner hole of the first annular diaphragm 21; the side wall of the shell body 65 is provided with a first side sound hole 63 and a second side sound hole 64. The first metal sheet 66 can be a first steel sheet 66A, which abuts against the top surface of the center magnetic circuit, thereby improving the stability of the magnetic circuit system 1.

[0057] According to an embodiment of the present application, the shell body 65 is provided with a first mounting hole for accommodating the first metal sheet 66, or the first metal sheet 66 is embedded in the shell body 65, or the first metal sheet 66 is injection molded on the shell body 65, or the first metal sheet 66 and the shell body 65 are integrally formed. Compared with directly arranging the first metal sheet 66 on the surface of the shell body 65, the wall thickness of the shell 6 can be reduced, thereby making the sound production device 100 thinner.

[0058] In an embodiment, the second diaphragm 31A includes a second annular diaphragm 31, and the side of the shell 6 facing the second annular diaphragm 31 is provided with a second protruding portion 671, the second protruding portion 671 abuts against the bottom surface of the center magnetic circuit, and the second annular diaphragm 31 is arranged around the second protruding portion 671; or, the bottom surface of the center magnetic circuit is provided with a second protruding portion 671, the second protruding portion 671 abuts against the shell 6, and the second annular diaphragm 31 is arranged around the second protruding portion 671. The inner wall of the shell 6 abuts against the bottom surface of the center magnetic circuit, and the inner wall of the shell 6 is also connected with the side wall of the magnetic circuit system 1, thereby improving the stability of the magnetic circuit system 1.

[0059] In an embodiment, the shell 6 comprises a shell body 65 and a second metal sheet 67 connected to each other, the second metal sheet 67 protrudes towards one side of the second annular diaphragm 31 to form a second protruding portion 671, the second protruding portion 671 penetrates the inner hole of the second annular diaphragm 31 and abuts against the bottom surface of the center magnetic circuit, and the side wall of the shell portion is provided with a first side sound hole 63 and a second side sound hole 64. Wherein, the second metal sheet 67 can also be a second steel sheet 67A, the second metal sheet 67 abuts against the bottom surface of the center magnetic circuit, thereby improving the stability of the magnetic circuit system 1.

[0060] In an embodiment, the second metal sheet 67 protrudes towards one side of the second annular diaphragm 31 to form a second protruding portion 671, the second protruding portion 671 abuts against the bottom surface of the magnetic circuit system 1; the second metal sheet 67 protrudes upwards and abuts against the bottom surface of the magnetic circuit system 1, so that the second metal sheet 67 improves the stability of the magnetic circuit system 1 without interfering with the second annular diaphragm 31. It should be noted that the side of the second annular diaphragm 31 away from the first annular diaphragm 21 is spaced apart from the inner wall of the shell 6.

[0061] According to an embodiment of the present application, the shell 6 comprises a first shell 651 and a second shell 652 connected detachably, the first shell 651 is provided with a first steel sheet 66A, the first shell 651 is provided with a first side sound hole 63, the second shell 652 is provided with a second steel sheet 67A, the second shell 652 is provided with a second side sound hole 64, and the first shell 651 and the second shell 652 enclose an accommodating cavity capable of accommodating the magnetic circuit system 1, the first vibration system 2 and the second vibration system 3.

[0062] Referring to FIG. 3, in an embodiment, a first mounting groove 1141 is formed in an outer edge of a top surface of the magnetic circuit system 1, and an inner periphery of a side of the first annular diaphragm 21 facing the second vibration system 3 is connected to a bottom wall of the first mounting groove 1141. By providing the first mounting groove 1141, a portion of the first auxiliary magnet 114 can protrude through the inner ring of the first annular diaphragm 21, thereby effectively increasing the volume of the first auxiliary magnet 114, and further improving the performance of the sound production device 100. In addition, by providing the first mounting groove 1141, the vibration space of the first annular diaphragm 21 can be avoided, and the probability of interference between the first annular diaphragm 21 and the first auxiliary magnet 114 is reduced. In addition, by providing the first mounting groove 1141, the inner periphery of the first annular diaphragm 21 is sealingly connected to the bottom wall of the first mounting groove 1141, thereby achieving a certain waterproof effect. By using the first annular diaphragm 21 in combination with the first mounting groove 1141, the height of the first annular diaphragm 21 is effectively reduced, and compared with the case where the first annular diaphragm 21 covers the top surface of the magnetic circuit system 1, the thickness of the sound production device 100 can be made thinner. It should be noted that by adding the first auxiliary magnet 114, the sound production device 100 has better performance than the traditional double-sided sound production device under the condition of the same volume, and has a smaller volume under the condition of the same performance. It should be noted that the top surface of the first auxiliary magnet 114 is provided with a first protruding portion 1142.

[0063] In an embodiment, the sound production device 100 includes a first working state and a second working state. In the first working state, the first vibration system 2 and the second vibration system 3 radiate sound waves of the same phase outward. In the second working state, the first vibration system 2 and the second vibration system 3 radiate sound waves of opposite phases outward. In the first working state, the first vibration system 2 and the second vibration system 3 radiate sound waves of the same phase outward, thereby improving the sound quality of the sound production device 100. In the second working state, the first vibration system 2 and the second vibration system 3 radiate sound waves of opposite phases outward, so that the sound production device 100 can be applied to electronic devices with call privacy, and better low-leakage effect is achieved.

[0064] Referring to FIGS. 4-7, in an embodiment, the first annular diaphragm 21 is sequentially provided with a first inner folding ring 211 and a first outer folding ring 212 from inside to outside; the first vibration system 2 includes a first ball top 23, the first ball top 23 is connected with the first annular diaphragm 21, and the first ball top 23 is located between the first inner folding ring 211 and the first outer folding ring 212, and the first voice coil 22 is fixed to the first ball top 23; the second annular diaphragm 31 is sequentially provided with a second inner folding ring 311 and a second outer folding ring 312 from inside to outside, the second vibration system 3 includes a second ball top 33, the second ball top 33 is connected with the second annular diaphragm 31, and the second ball top 33 is located between the second inner folding ring 311 and the second outer folding ring 312, and the second voice coil 32 is fixed to the second ball top 33. Taking the first ball top 23 as an example, the first ball top 23 is bonded in the flat area between the first inner folding ring 211 and the first outer folding ring 212, and the first ball top 23 can be located on the upper side of the first annular diaphragm 21 or on the lower side of the first annular diaphragm 21. When the first ball top 23 is located on the upper side of the first annular diaphragm 21, one side of the first annular diaphragm 21 is connected with the first voice coil 22, and the other side of the first annular diaphragm 21 is connected with the first ball top 23, so as to realize that the first voice coil 22 is fixed to the first ball top 23. When the first ball top 23 is located on the lower side of the first annular diaphragm 21, one side of the first ball top 23 is connected with the first annular diaphragm 21, and the other side of the first ball top 23 is connected with the first voice coil 22, so as to ensure that the first voice coil 22 can be in the radiation range of the first ball top 23. The second ball top 33 is similar to the first ball top 23, and will not be described here.

[0065] In an embodiment, the first inner folding ring 211 is protrudingly arranged away from the second annular diaphragm 31, and the first outer folding ring 212 is protrudingly arranged towards the second annular diaphragm 31; the second inner folding ring 311 is protrudingly arranged away from the first annular diaphragm 21, and the second outer folding ring 312 is protrudingly arranged towards the first annular diaphragm 21. At present, the existing ordinary diaphragm generally only has a ring-shaped protrusion on the periphery, and in the present embodiment, taking the first annular diaphragm 21 as an example, the first annular diaphragm 21 has the first inner folding ring 211 and the first outer folding ring 212, wherein the first inner folding ring 211 is arranged close to the first auxiliary magnet 114 and protrudes upward, which not only can reduce the probability of collision between the first auxiliary magnet 114 and the first annular diaphragm 21, but also can reserve more space for the first annular diaphragm 21 and the center magnet 111 due to the protruding upward of the first inner folding ring 211, i.e. the existence of the first inner folding ring 211 can increase the volume of the first auxiliary magnet 114 without changing the thickness of the sound production device 100, so that the performance of the sound production device 100 is improved. The effect of arranging the second inner folding ring 311 on the second annular diaphragm 31 is similar, and will not be described here.

[0066] Referring to FIGS. 3-5, in an embodiment, the center magnetic circuit includes the center magnet 111, the sub-center magnet 112, and the first auxiliary magnet 114. The sub-center magnet 112 is arranged around the outer periphery of the center magnet 111 and spaced to form the second magnetic gap 117. The side magnet 113 is arranged around the outer periphery of the sub-center magnet 112 and spaced to form the first magnetic gap 116. The first auxiliary magnet 114 is arranged on the side of the center magnet 111 facing the first annular diaphragm 21. The inner periphery of the side of the first annular diaphragm 21 facing the second vibration system 3 is connected to the first auxiliary magnet 114. In this embodiment, the number of magnets of the magnetic circuit system 1 of the sound production device 100 is increased by adding the first auxiliary magnet 114, which helps to improve the performance of the sound production device 100. In addition, taking the first annular diaphragm 21 as an example, the inner periphery of the first annular diaphragm 21 is in abutment with the first auxiliary magnet 114, which helps to improve the stability of the first annular diaphragm 21.

[0067] In an embodiment, the second diaphragm 31A includes the second annular diaphragm 31. The center magnetic circuit further includes the second auxiliary magnet 115. The first auxiliary magnet 114 and the second auxiliary magnet 115 are arranged on opposite sides of the center magnet 111 in the vertical direction. The magnetization direction of the first auxiliary magnet 114 is opposite to the magnetization direction of the second auxiliary magnet 115. The inner periphery of the side of the second annular diaphragm 31 facing the first annular diaphragm 21 is connected to the second auxiliary magnet 115. In this embodiment, the number of magnets of the magnetic circuit system 1 of the sound production device 100 is increased by adding the second auxiliary magnet 115, which helps to improve the performance of the sound production device 100. In addition, the inner periphery of the second annular diaphragm 31 is in abutment with the first auxiliary magnet 114, which helps to improve the stability of the first annular diaphragm 21. It should be noted that the size of the portion of the first auxiliary magnet 114 protruding into the inner periphery of the first annular diaphragm 21 is adapted to the size of the inner periphery of the first annular diaphragm 21. Similarly, the size of the portion of the second auxiliary magnet 115 protruding into the inner periphery of the second annular diaphragm 31 is adapted to the size of the inner periphery of the second annular diaphragm 31. It should be noted that, compared with the conventional double-sided sound production device, the sound production device 100 has better performance under the condition of the same volume, and has smaller volume under the condition of the same performance.

[0068] According to an embodiment of the present application, the first ring-shaped diaphragm 21 and the second ring-shaped diaphragm 31 are different in size and shape, and the first ball top 23 and the second ball top 33 are different in size and shape. The first ring-shaped diaphragm 21 and the second ring-shaped diaphragm 31 are different in size and shape, on one hand, to make the first ring-shaped diaphragm 21 match the size of the first sub-magnet 114 and the second ring-shaped diaphragm 31 match the size of the second sub-magnet 115, effectively utilize the space, and on the other hand, to make the effective vibration area of the first ring-shaped diaphragm 21 equal to the effective vibration area of the second ring-shaped diaphragm 31. It should be noted that the effective vibration area refers to the effective vibration area of the drum paper / diaphragm in the vibration process of the sound production device 100.

[0069] Referring to FIG. 10, in an embodiment, the second sub-magnet 115 is provided with a second mounting groove, and the inner periphery of the side of the second ring-shaped diaphragm 31 facing the first ring-shaped diaphragm 21 is connected to the bottom wall of the second mounting groove. By providing the second mounting groove, a part of the second sub-magnet 115 can protrude through the inner ring of the second ring-shaped diaphragm 31, thereby effectively increasing the volume of the second sub-magnet 115, and further improving the performance of the sound production device 100. In addition, by providing the second mounting groove, the vibration space of the second ring-shaped diaphragm 31 can be avoided, and the probability of interference between the second ring-shaped diaphragm 31 and the second sub-magnet 115 is reduced.

[0070] According to an embodiment of the present application, the inner periphery of the side of the second ring-shaped diaphragm 31 facing the first ring-shaped diaphragm 21 is connected to the bottom surface of the magnetic circuit system 1. The bottom surface of the magnetic circuit system 11 is located above the second ring-shaped diaphragm 31, that is, the bottom surface of the magnetic circuit system 1 does not protrude from the inner ring of the second ring-shaped diaphragm 31, which makes the inner ring opening of the second ring-shaped diaphragm 31 not too large, and ensures the strength of the second ring-shaped diaphragm 31.

[0071] In an embodiment, the sub-center magnet 112 includes a ring-shaped sub-center magnet, and / or the edge magnet 113 includes a ring-shaped edge magnet. The ring-shaped sub-center magnet has a larger volume than two strip-shaped magnets arranged at intervals, and thus can improve the performance of the sound production device 100. The ring-shaped edge magnet can further improve the performance of the sound production device 100 compared with two strip-shaped magnets.

[0072] According to an embodiment of the present application, the sub-center magnet 112 and the edge magnet 113 can be a folded edge magnet or two strip-shaped magnets, which have a lower cost than a ring-shaped magnet.

[0073] Referring to FIGS. 3-5, in an embodiment, the magnetic circuit system 1 further comprises a magnetic conducting plate assembly 12, the magnetic conducting plate assembly 12 comprising a first magnetic conducting plate 121 and a second magnetic conducting plate 122, the center magnet 111 and the sub-center magnet 112 are connected with the first magnetic conducting plate 121 away from one side of the first annular diaphragm 21, the other side of the first magnetic conducting plate 121 is connected with the first auxiliary magnet 114; the sub-center magnet 112 and the edge magnet 113 are connected with the second magnetic conducting plate 122 towards one side of the first annular diaphragm 21. By setting the first magnetic conducting plate 121 to connect the center magnet 111 and the sub-center magnet 112, the center magnet 111 and the sub-center magnet 112 pass through the magnetic conduction of the first magnetic conducting plate 121 to ensure the magnetic flux of the second magnetic gap 117, so that the sound emitted by the sound emitting device 100 is more accurate, and by the same token, by setting the second magnetic conducting plate 122 to connect the sub-center magnet 112 and the edge magnet 113, the sub-center magnet 112 and the edge magnet 113 pass through the magnetic conduction of the second magnetic conducting plate 122 to ensure the magnetic flux of the first magnetic gap 116, so that the sound of the sound emitting device 100 is more accurate.

[0074] In an embodiment, the magnetic conductive plate assembly 12 further comprises a third magnetic conductive plate 123 and an edge magnetic conductive plate 124, the third magnetic conductive plate 123 is arranged between the center magnet 111 and the second auxiliary magnet 115, and the edge magnet 113 is connected to the edge magnetic conductive plate 124 on the side close to the first annular diaphragm 21. The third magnetic conductive plate 123 is arranged between the center magnet 111 and the second auxiliary magnet 115, so that the second auxiliary magnet 115 and the center magnet 111 can conduct magnetism through the third magnetic conductive plate 123 to ensure the magnetic flux of the second magnetic gap 117. The edge magnetic conductive plate 124 is connected to the edge magnet 113, so that the edge magnet 113 can conduct magnetism through the edge magnetic conductive plate 124 to ensure the magnetic flux of the first magnetic gap 116. In an embodiment, the sound generating device 100 further comprises a first annular mounting frame 41, the first annular mounting frame 41 is connected to the side of the edge magnetic conductive plate 124 facing the first annular diaphragm 21, and the outer edge of the first annular diaphragm 21 is connected to the first annular mounting frame 41; or, the edge magnetic conductive plate 124 is protruded in the direction facing the first annular diaphragm 21 to form a first fixing part, and the outer edge of the first annular diaphragm 21 is connected to the first fixing part; or, the sound generating device 100 further comprises a first annular mounting frame 41, the edge magnetic conductive plate 124 comprises a flat plate part and a bent part connected to each other, the edge magnet 113 is connected to the flat plate part on the side close to the first annular diaphragm 21, and the bent part is arranged on the side of the flat plate part close to the first annular diaphragm 21 and forms an annular support together with the first annular mounting frame 41, and the outer edge of the first annular diaphragm is connected to the annular support. The first annular mounting frame 41 is arranged to fix the outer edge of the first annular diaphragm 21, thereby improving the stability of the first annular diaphragm 21; or the edge magnetic conductive plate 124 is protruded upward to form a first fixing part, the first fixing part is an annular fixing part, and the outer edge of the first annular diaphragm 21 is connected to the first fixing part, thereby improving the stability of the first annular diaphragm 21; or the edge magnetic conductive plate 124 is provided with a bent part, the bent part and the first annular mounting frame 41 jointly form an annular support, and the outer edge of the first annular diaphragm 21 is connected to the annular support, thereby improving the stability of the first annular diaphragm 21.

[0075] According to an embodiment of the present application, the outer edge of the first annular diaphragm 21 is connected to the annular support, thereby improving the stability of the first annular diaphragm 21.

[0076] According to another embodiment of the present application, the outer edge of the first annular diaphragm 21 is connected to the bent part, thereby improving the stability of the first annular diaphragm 21.

[0077] In an embodiment, the outer edge of the side magnet 113 protrudes in a direction away from the first ring-shaped diaphragm 21 to form a second fixing portion, and the outer edge of the diaphragm of the second vibration system 3 is connected with the second fixing portion; or the second magnetic conducting plate 122 protrudes in a direction away from the first ring-shaped diaphragm 21 to form a third fixing portion, and the outer edge of the diaphragm of the second vibration system 3 is connected with the third fixing portion; or the outer edge of the side magnet 113 protrudes in a direction away from the first ring-shaped diaphragm 21 to form a fourth fixing portion 1131, and the sound generating device 100 further comprises a second ring-shaped mounting frame 42, which is arranged on the inner circumferential side of the fourth fixing portion 1131, and the outer edge of the second diaphragm 31A is connected with the second ring-shaped mounting frame 42. Wherein, the outer edge of the side magnet 113 protrudes downward to form the second fixing portion, which can not only be used to fix the outer edge of the second ring-shaped diaphragm 31, but also increase the volume of the side magnet 113 due to the protrusion of the side magnet 113 downward, thereby improving the performance of the sound generating device 100; or the second magnetic conducting plate 122 protrudes downward to form the third fixing portion, which is connected with the outer edge of the second ring-shaped diaphragm 31, thereby improving the stability of the second ring-shaped diaphragm 31; or the side magnet 113 protrudes downward to form the fourth fixing portion 1131, and the second ring-shaped mounting frame 42 is arranged on the inner side of the fourth fixing portion 1131, which not only can limit the second ring-shaped mounting frame 42, but more importantly, can effectively improve the performance of the sound generating device 100, and the outer edge of the second diaphragm 31 is connected with the second mounting frame, thereby improving the stability of the second ring-shaped diaphragm 31.

[0078] It should be noted that the first ring-shaped mounting frame 41 and the second ring-shaped mounting frame 42 are both plastic frames, which can avoid the risk of short circuit caused by the conductivity of the frame itself compared with metal frames.

[0079] In an embodiment, the size of the first sub-magnet 114 in at least one of the first direction and the second direction in the horizontal plane is smaller than the size of the center magnet 111 in the corresponding direction. Wherein, the first direction can be the width direction of the sound generating device 100, and the second direction can be the length direction of the sound generating device 100, and the size of the second sub-magnet 115 in at least one of the first direction and the second direction is smaller than the size of the center magnet 111, which is mainly to avoid the vibration space of the second ring-shaped diaphragm 31. It should be noted that the first direction is the left-right direction shown in FIG. 1, and the second direction is the front-rear direction shown in FIG. 1.

[0080] In an embodiment, the second sub-magnet 115 has a dimension extending in the first direction in the horizontal plane that is greater than a dimension of the center magnet 111 extending in the first direction, and the second sub-magnet 115 has a dimension extending in the second direction in the horizontal plane that is greater than a dimension of the center magnet 111 extending in the second direction. The first sub-magnet 114 has a dimension in the first direction and a dimension in the second direction that are both greater than the dimension of the center magnet 111, so that the first sub-magnet 114 can simultaneously act on the first magnetic gap 116 and the second magnetic gap 117, thereby effectively improving the performance of the sound production device 100.

[0081] In an embodiment, the first sub-magnet 114 is provided with a first avoiding portion, and / or the second sub-magnet 115 is provided with a second avoiding portion. The first avoiding portion is provided on the first sub-magnet 114 to avoid the vibration space of the first ring-shaped diaphragm 21, and the second avoiding portion is provided on the second sub-magnet 115 to avoid the vibration space of the second ring-shaped diaphragm 31. It should be noted that the first avoiding portion and the second avoiding portion can be a chamfer or an avoiding groove.

[0082] Referring to FIG. 3, in an embodiment, the sound production device 100 further comprises a separation piece 5 provided with a plurality of air holes 51, and the separation piece 5 is arranged around the outer periphery of the side magnet 113 and connected with the side magnet 113. By arranging the separation piece 5 around the outer periphery of the side magnet 113, the sound absorption particles are separated from the sound production device, so as to avoid the sound absorption particles from entering the sound production device and affecting the sound quality effect of the sound production device. It should be noted that since the pore size of the air holes 51 is smaller than the particle size of the sound absorption particles, the separation piece 5 can ensure the flow of gas while preventing the sound absorption particles from entering the inside of the sound production device.

[0083] In an embodiment, the first ring-shaped diaphragm 21 is provided with a first conductive layer 213, and the sound production device 100 comprises a first ring-shaped mounting frame 41 which is injection molded with a solder pad, and the first conductive layer 213 is electrically connected with the first voice coil 22 and the solder pad, respectively; and / or the second diaphragm 31A is provided with a second conductive layer 313, and the sound production device 100 comprises a second ring-shaped mounting frame 42 which is injection molded with a solder pad, and the second conductive layer 313 is electrically connected with the second voice coil 32 and the solder pad, respectively. Taking the first conductive layer 213 as an example, by using the first conductive layer 213 to electrically connect with the solder pad, compared with the ordinary diaphragm, the first conductive layer 213 in the embodiment can save the conductive branch, save the internal space, and the saved space can be used to fill more magnets, thereby improving the performance of the sound production device 100; the effect of using the second conductive layer 313 is similar to that of using the first conductive layer 213, which will not be described here.

[0084] In an embodiment, the first ring-shaped diaphragm 21 and the diaphragm of the second vibration system 3 have the same effective vibration area. The first ring-shaped diaphragm 21 and the second ring-shaped diaphragm 31 have the same effective vibration area, which can further reduce the leakage effect and improve the privacy of the call when the sound generating device 100 is applied to an electronic device with call privacy. It should be noted that the first vibration system and the second vibration system have the same or similar TS parameters and performance.

[0085] Please refer to FIG. 4 and FIG. 5, in an embodiment, the first magnetic gap 116 and the second magnetic gap 117 are arranged in a horizontal direction. Since the first magnetic gap 116 and the second magnetic gap 117 are arranged in a horizontal direction, compared with the prior art sound generating device 100 provided with two magnetic gaps arranged in a vertical direction, the sound generating device 100 in the embodiment can be made thinner, i.e. the size in the up-down direction is smaller, thereby better adapting to the use scene with smaller installation space, and being conducive to the miniaturization and lightness of the sound generating device 100. It should be noted that the first magnetic gap 116 and the second magnetic gap 117 arranged in a horizontal direction means that the second magnetic gap 117 is located on the inner ring side of the first magnetic gap 116. It should also be noted that the up-down direction is the up-down direction shown in the figure.

[0086] The present application also provides an electronic device, which comprises a shell and the sound generating device 100 described above. The electronic device can be a wearable electronic device, such as a watch, in addition, the electronic device can also be a headset, a mobile phone, a bracelet, a notebook computer, a VR (English name: Virtual Reality, Chinese name: Virtual Reality) device, an AR (English name: Augmented Reality, Chinese name: Augmented Reality) device, etc. Since the electronic device adopts all the technical solutions of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0087] The above is only an exemplary embodiment of the present application, and does not limit the patent scope of the present application, any equivalent structural transformation made by using the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A sound-generating device, characterized in that, include A magnetic circuit system, the magnetic circuit system including a magnet assembly, the magnet assembly including a central magnetic circuit and a side magnet surrounding the central magnetic circuit, the central magnetic circuit and the side magnet forming a first magnetic gap, and the central magnetic circuit forming a second magnetic gap; A first vibration system, the first vibration system includes a first annular diaphragm and a first voice coil connected to each other, the first voice coil being disposed corresponding to the first magnetic gap; The second vibration system includes a second diaphragm and a second voice coil connected to each other, with the second voice coil positioned corresponding to the second magnetic gap; the first vibration system and the second vibration system are respectively positioned on both sides of the magnetic circuit system along the vibration direction. The housing is capable of accommodating the magnetic circuit system, the first vibration system, and the second vibration system. The height of the first annular diaphragm is not higher than the height of the top surface of the magnetic circuit system, so that the housing and the first vibration system form a first acoustic cavity. The side of the housing is provided with a first side acoustic hole communicating with the first acoustic cavity. The housing and the second vibration system also form a second acoustic cavity independent of the first acoustic cavity. The side of the housing is also provided with a second side acoustic hole communicating with the second acoustic cavity.

2. The sound-generating device as described in claim 1, characterized in that, The top surface of the central magnetic circuit is provided with a first protrusion, which abuts against the housing. The first annular diaphragm is arranged around the first protrusion, and the height of the top surface of the first annular diaphragm is not higher than the height of the top surface of the first protrusion.

3. The sound-generating device as described in claim 2, characterized in that, The housing includes a shell body and a first metal sheet connected to each other. The shell body and the first metal sheet form a cavity that can accommodate the magnetic circuit system, the first vibration system and the second vibration system. The top surface of the central magnetic circuit passes through the inner hole of the first annular diaphragm and abuts against the first metal sheet. The shell body has a first side sound hole and a second side sound hole on its side.

4. The sound-generating device as described in claim 1, characterized in that, The second diaphragm includes a second annular diaphragm; The housing has a second protrusion on the side facing the second annular diaphragm, the second protrusion abuts against the bottom surface of the central magnetic circuit, and the second annular diaphragm is arranged around the second protrusion; or, The bottom surface of the central magnetic circuit is provided with a second protrusion, which abuts against the housing, and the second annular diaphragm is arranged around the second protrusion.

5. The sound-generating device as described in claim 4, characterized in that, The housing includes a shell body and a second metal sheet connected to each other. The second metal sheet protrudes to one side of the second annular diaphragm to form a second protrusion. The second protrusion passes through the inner hole of the second annular diaphragm and abuts against the bottom surface of the central magnetic circuit. The side of the housing is provided with a first side acoustic hole and a second side acoustic hole.

6. The sound-generating device as claimed in claim 1, characterized in that, The outer edge of the top surface of the magnetic circuit system is provided with a first mounting groove, and the inner periphery of the side of the first annular diaphragm facing the second vibration system is connected to the bottom wall of the first mounting groove.

7. The sound-generating device as claimed in claim 1, characterized in that, The sound-generating device includes a first operating state and a second operating state. In the first operating state, the first vibration system and the second vibration system radiate sound waves of the same phase outwards; in the second operating state, the first vibration system and the second vibration system radiate sound waves of opposite phase outwards.

8. The sound-generating device as claimed in claim 1, characterized in that, The first annular diaphragm is provided with a first inner folded ring and a first outer folded ring from the inside to the outside. The first vibration system includes a first dome, which is connected to the first annular diaphragm and is located between the first inner folded ring and the first outer folded ring. The first voice coil is fixed to the first dome. The second diaphragm has a second inner folded ring and a second outer folded ring arranged sequentially from the inside to the outside. The second vibration system includes a second dome, which is connected to the second diaphragm and is located between the second inner folded ring and the second outer folded ring. The second voice coil is fixed to the second dome.

9. The sound-generating device as described in claim 8, characterized in that, The first inner fold ring protrudes away from the second diaphragm, and the first outer fold ring protrudes towards the second diaphragm; the second inner fold ring protrudes away from the first annular diaphragm, and the second outer fold ring protrudes towards the first annular diaphragm.

10. The sound-generating device as described in any one of claims 1 to 9, characterized in that, The central magnetic circuit includes a central magnet, a secondary central magnet, and a first auxiliary magnet. The secondary central magnet surrounds the outer periphery of the central magnet and forms a second magnetic gap at intervals. The side magnet surrounds the outer periphery of the secondary central magnet and forms the first magnetic gap at intervals. The inner peripheral edge of the first annular diaphragm facing the second diaphragm is connected to the first auxiliary magnet.

11. The sound-generating device as claimed in claim 10, characterized in that, The second diaphragm includes a second annular diaphragm, and the central magnetic circuit also includes a second auxiliary magnet. The first auxiliary magnet and the second auxiliary magnet are arranged opposite to each other on both sides of the central magnet in a vertical direction. The magnetization direction of the first auxiliary magnet is opposite to that of the second auxiliary magnet. The inner periphery of the side of the second annular diaphragm facing the first annular diaphragm is connected to the second auxiliary magnet.

12. The sound-generating device as claimed in claim 11, characterized in that, The magnetic circuit system further includes a magnetic guide plate assembly, which includes a first magnetic guide plate and a second magnetic guide plate. The side of the central magnet and the secondary central magnet away from the first annular diaphragm are both connected to the first magnetic guide plate, and the other side of the first magnetic guide plate is connected to the first auxiliary magnet. The side of the secondary central magnet and the side magnet facing the first annular diaphragm are both connected to the second magnetic guide plate.

13. The sound-generating device as claimed in claim 12, characterized in that, The magnetic guide plate assembly further includes a third magnetic guide plate and a side magnetic guide plate. The third magnetic guide plate is sandwiched between the second auxiliary magnet and the central magnet. The side magnet is connected to the side magnetic guide plate on the side closest to the first annular diaphragm.

14. The sound-generating device as claimed in claim 10, characterized in that, The size of the first auxiliary magnet in the horizontal plane along at least one of the first and second directions is smaller than the size of the central magnet in the corresponding direction.

15. The sound-generating device as claimed in claim 11, characterized in that, The dimension of the second auxiliary magnet extending in the horizontal plane along the first direction is greater than the dimension of the central magnet extending in the first direction, and the dimension of the second auxiliary magnet extending in the horizontal plane along the second direction is greater than the dimension of the central magnet extending in the second direction.

16. The sound-generating device as claimed in claim 10, characterized in that, The sound-generating device also includes an isolation component, which has multiple vent holes and is arranged around the periphery of the side magnet and connected to the side magnet.

17. The sound-generating device as claimed in any one of claims 1 to 9, characterized in that, The first annular diaphragm is provided with a first conductive layer, which is electrically connected to the first voice coil and the solder pad respectively; And / or, The second diaphragm is provided with a second conductive layer, which is electrically connected to the second voice coil and the solder pad respectively.

18. The sound-generating device as claimed in any one of claims 1 to 9, characterized in that, The first magnetic gap and the second magnetic gap are spaced apart in the horizontal direction.

19. An electronic device, characterized in that, It includes a housing and a sound-generating device as claimed in any one of claims 1 to 18.

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