Sound production apparatus and electronic device

Abstract

The present invention relates to the technical field of sound energy conversion, and 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 used for forming a first magnetic gap and a second magnetic gap; the first vibration system comprises a first annular diaphragm and a first voice coil, wherein the first voice coil is arranged corresponding to the first magnetic gap; the second vibration system comprises a second diaphragm and a second voice coil; the housing and the first vibration system define a first sound cavity; a side sound outlet hole communicated with the first sound cavity is formed in a side wall of the housing; the housing and the second vibration system define a second sound cavity; and a front sound outlet hole communicated with the second sound cavity is formed in the housing, such that the sound production apparatus can be adapted to a use scenario in which a front sound outlet tube and a side sound outlet tube are provided. Because both the first vibration system and the second vibration system can produce sound, the total radiation area of the sound production apparatus is increased, and the performance of the sound production apparatus is improved.

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 (mobile phones, earphones, tablet computers, etc.) gradually appear new trends such as miniaturization, thinness, and intelligence. Consumers' requirements for the loudspeakers in electronic devices are also increasingly high, and miniaturized, high-performance, and high-quality loudspeakers gradually become mainstream demands.

[0003] At present, for mobile phones provided with a front sound outlet and a side sound outlet, a front cavity is generally formed by a loudspeaker and a mobile phone frame, the loudspeaker sounds on one side, and the sound enters the front sound outlet and the side sound outlet through the front cavity and a connecting pipeline. Since sound is produced by a single sound production unit, the performance of the loudspeaker gradually cannot meet the needs of the mobile phone. SUMMARY

[0004] The main purpose of the present application is to provide a loudspeaker sound production device and an electronic device, aiming to solve the technical problem of how to improve performance.

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

[0006] A magnetic circuit system, comprising a magnet assembly, the magnet assembly comprising 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 forming a first magnetic gap, and the center magnetic circuit forming a second magnetic gap;

[0007] A first vibration system, comprising a first ring-shaped 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, comprising 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; and the first vibration system and the second vibration system are arranged on both sides of the magnetic circuit system along the vibration direction;

[0009] The shell can accommodate the magnetic circuit system, the first vibration system and the second vibration system, the height of the first annular diaphragm is lower than the height of the top surface of the magnetic circuit system, so that the shell and the first vibration system enclose a first sound cavity, the side wall of the shell is provided with a side sound hole communicating with the first sound cavity, the shell is provided with a front sound hole on the side facing the second diaphragm, the shell and the second vibration system enclose a second sound cavity, the second sound cavity communicates with the front sound hole, the top surface of the center magnetic circuit is provided with a protruding portion, the protruding portion abuts against the shell, and the first annular diaphragm is arranged around the protruding portion.

[0010] In an embodiment, 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.

[0011] In an embodiment, the protruding portion passes through the inner hole of the first annular diaphragm and abuts against the inner wall of the shell facing the first annular diaphragm.

[0012] In an embodiment, the shell comprises a shell body and a metal sheet, the top of the shell body is provided with a mounting hole accommodating the metal sheet, the metal sheet is raised on the side facing the first annular diaphragm to form an abutting protrusion, the abutting protrusion abuts against the protruding portion, the shell body and the metal sheet enclose an accommodation cavity capable of accommodating the magnetic circuit system, the first vibration system and the second vibration system, the side wall of the shell body is provided with the side sound hole, and the shell body is provided with the front sound hole on the side facing the second diaphragm.

[0013] In an embodiment, the shell body further comprises a body portion and a cover, the top of the body portion is provided with the mounting hole, the side wall of the body portion is provided with the side sound hole, the cover covers the second vibration system, and the cover is provided with the front sound hole.

[0014] 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.

[0015] In an embodiment, the first annular diaphragm is sequentially provided with a first inner folding ring and a first outer folding ring from inside to outside, the first vibration system comprises a first ball top, the first ball top is connected with the first annular diaphragm, and the first ball top is located between the first inner folding ring and the first outer folding ring.

[0016] The second vibrating diaphragm is sequentially provided with a second inner folding ring and a second outer folding ring from inside to outside, and the second vibrating system comprises a second spherical top connected with the second vibrating diaphragm and located between the second inner folding ring and the second outer folding ring.

[0017] 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 toward the second vibrating diaphragm; the second inner folding ring is convexly arranged away from the first annular vibrating diaphragm, and the second outer folding ring is convexly arranged toward the first annular vibrating diaphragm.

[0018] In an embodiment, the center magnetic circuit comprises a center magnet, a secondary center magnet and a first auxiliary magnet, the first auxiliary magnet is provided with the convex part on a side away from the center magnet, the secondary center magnet is arranged around an outer periphery of the center magnet and spaced to form the second magnetic gap, the side magnet is arranged around an outer periphery of the secondary center magnet and spaced to form the first magnetic gap, and an inner periphery of a side of the first annular vibrating diaphragm toward the second vibrating diaphragm is connected with the first auxiliary magnet.

[0019] In an embodiment, the second vibrating diaphragm comprises a second annular vibrating diaphragm, the center magnetic circuit further comprises a second auxiliary magnet, the first auxiliary magnet and the second auxiliary magnet are oppositely arranged on two sides of the center magnet in a vertical direction, a magnetization direction of the first auxiliary magnet and a magnetization direction of the second auxiliary magnet are opposite, and an inner periphery of a side of the second annular vibrating diaphragm toward the first annular vibrating diaphragm is connected with the second auxiliary magnet.

[0020] In an embodiment, the magnetic conductive plate assembly further comprises a third magnetic conductive plate and a side magnetic conductive plate, the third magnetic conductive plate is arranged between the second auxiliary magnet and the center magnet, and a side of the side magnet close to the first annular vibrating diaphragm is connected with the side magnetic conductive plate.

[0021] In an embodiment, a size of the first auxiliary magnet in at least one of a first direction and a second direction in a horizontal plane is smaller than a size of the center magnet in a corresponding direction.

[0022] In an embodiment, a size of the second auxiliary magnet extending in a first direction in a horizontal plane is greater than a size of the center magnet extending in the first direction, and a size of the second auxiliary magnet extending in a second direction in the horizontal plane is greater than a size of the center magnet extending in the second direction.

[0023] In an embodiment, the second vibration system comprises a second diaphragm and a second voice coil connected to each other, the second voice coil is arranged corresponding to the second magnetic gap, so that the second voice coil can drive the second diaphragm to vibrate and sound, the magnet assembly further comprises a second auxiliary magnet, the first auxiliary magnet and the second auxiliary magnet are arranged on both sides of the center magnet in the vertical direction, the first auxiliary magnet and the second auxiliary magnet are arranged in the same polarity, and the second diaphragm is connected to the second auxiliary magnet towards the inner periphery of one side of the first annular diaphragm.

[0024] In an embodiment, the sound generating device further comprises a spacer, the spacer is provided with a plurality of air holes, and the spacer is arranged around the outer periphery of the edge magnet and connected to the edge magnet.

[0025] In an embodiment, the first annular diaphragm is provided with a first conductive layer, and the first conductive layer is electrically connected to the first voice coil and the pad respectively.

[0026] And / or,

[0027] The second diaphragm is provided with a second conductive layer, and the second conductive layer is electrically connected to the second voice coil and the pad respectively.

[0028] In an embodiment, the first annular diaphragm and the second diaphragm have the same effective vibration area.

[0029] In an embodiment, the first magnetic gap and the second magnetic gap are arranged in the horizontal direction.

[0030] The application further provides an electronic device, which comprises a shell and the sound generating device.

[0031] The technical scheme of the application adopts the shell, and the shell is provided with the front sound hole and the side sound hole, so that the sound generating device can adapt to the use scene of the front sound pipe and the side sound pipe. Since the first vibration system and the second vibration system can both sound, the total radiation area of the sound generating device is increased, and the performance of the sound generating device is improved. In addition, taking a mobile phone as an example, the middle frame is generally provided with a front cavity channel capable of accommodating part of the sound generating device structure, so that the structure of the sound generating device can be larger, and the sound generating device has better performance. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical scheme in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and those skilled in the art can also obtain other drawings from the structures shown in the drawings without creative labor.

[0033] Fig. 1 is a structural schematic diagram of an embodiment of the sound production device provided by the present application, which is configured with a shell;

[0034] Fig. 2 is a structural schematic diagram of another perspective of Fig. 1;

[0035] Fig. 3 is an exploded structural schematic diagram of an embodiment of the sound production device provided by the present application, which is configured with a shell;

[0036] Fig. 4 is a cross-sectional structural schematic diagram of an embodiment of the sound production device provided by the present application, which is configured with a shell;

[0037] Fig. 5 is a cross-sectional structural schematic diagram of another embodiment of the sound production device provided by the present application, which is configured with a shell;

[0038] Fig. 6 is a structural schematic diagram of an embodiment of the sound production device provided by the present application, which is not assembled with a shell;

[0039] Fig. 7 is a structural schematic diagram of another perspective of Fig. 6;

[0040] Fig. 8 is a structural schematic diagram of an embodiment of the first annular diaphragm provided by the present application;

[0041] Fig. 9 is a structural schematic diagram of an embodiment of the second diaphragm provided by the present application;

[0042] Fig. 10 is a structural schematic diagram of an embodiment of the connection between the second sub-magnet and the second diaphragm provided by the present application.

[0043] 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 groove; 1142, 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, front sound hole; 62, first sound cavity; 63, side sound hole; 64, first shell; 641, metal sheet; 641A, steel sheet; 6411, abutting protrusion; 65, second shell; 66, cover body; 67, second sound cavity.

[0044] The objectives, functional characteristics and advantages of the present application will be further described with reference to the embodiments in combination with the accompanying drawings. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only 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 the other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the protection scope of the present application.

[0046] 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.

[0047] 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 are satisfied at the same time. 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 appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0048] 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 have increasingly high requirements for the loudspeakers in electronic devices, and miniaturized, high-performance, and high-quality loudspeakers gradually become mainstream demands. At present, for mobile phones provided with a front sound outlet and a side sound outlet, a front cavity is generally formed by a loudspeaker and a mobile phone middle frame, the loudspeaker sounds on one side, and the sound enters the front sound outlet and the side sound outlet through the front cavity and a connecting pipeline. Since sound is generated by relying on a single sound generating device, the performance of the loudspeaker gradually cannot meet the needs of the mobile phone.

[0049] Therefore, the present application provides a sound generating device.

[0050] Referring to FIGS. 1-4, in an embodiment of the present application, the sound production device 100 comprises a magnetic circuit system 1, a first vibration system 2, a second vibration system 3 and a housing 6. The magnetic circuit system 1 comprises a magnet assembly 11, the magnet assembly 11 comprising a central magnetic circuit and a peripheral magnet 113 surrounding the periphery of the central magnetic circuit, the central magnetic circuit and the peripheral magnet 113 forming a first magnetic gap 116, and the central magnetic circuit forming a second magnetic gap 117. The first vibration system 2 comprises a first annular diaphragm 21 and a first voice coil 22 connected to each other, the first voice coil 22 being 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 comprises a second diaphragm 31A and 32 and a second voice coil connected to each other, the second voice coil 32 being 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 two 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 lower 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 62, and the side wall of the housing 6 is provided with a side sound hole 63 communicating with the first sound cavity 62. The housing 6 and the second vibration system 3 form a second sound cavity 67, and the second sound cavity 67 communicates with the front sound hole 61. The top surface of the central magnetic circuit is provided with a protruding portion 1142, the protruding portion 1142 abuts against the housing 6, and the first annular diaphragm 21 surrounds the protruding portion.

[0051] The technical scheme of the present application adopts the shell 6, and the shell 6 is provided with the front sound hole 61 and the side sound hole 63, so that the sound generating device 100 can not only adapt to the use scene of single side sound emission, but also adapt to the use scene of front sound emission pipe and side sound emission pipe. The front sound hole 61 is used for front sound emission, and the side sound hole 63 is used for side sound emission. Since the first vibration system 2 and the second vibration system 3 can both emit sound, the total radiation area of the sound generating device 100 is increased, and the performance of the sound generating device 100 is improved. In addition, taking a mobile phone as an example, the middle frame of the mobile phone is provided with a front cavity channel capable of accommodating part of the structure of the sound generating device 100. This makes the structure of the sound generating device 100 larger, so that the sound generating device 100 has better performance. In the application scene of the sound generating device 100, since the height of the front cavity surrounded by the sound generating device 100 and the middle frame is higher than that of the sound generating device provided with two side through holes, the equivalent mass of the vibration system of the sound generating device 100 is lower, and the resonance frequency F0 of the sound generating device 100 is larger. In simple terms, the front cavity resonance peak of the sound generating device 100 is more backward. Since the resonance frequency F0 of the sound generating device 100 is larger, it is more difficult for the user to hear the harsh noise, so the listening experience is better. It should be noted that the sound generating device 100 is particularly suitable for mobile phones provided with a front cavity channel in the middle frame. It should be noted that the protruding part 1142 increases the volume of the center magnetic circuit, improves the performance of the sound generating device 100, and the protruding part 1142 abuts against the shell 6, which further enhances the stability of the magnetic circuit system 1.

[0052] Please refer to FIGS. 3 to 6. In an embodiment, the outer edge of the top surface of the magnetic circuit system 1 is provided with a first mounting groove 1141, and the inner periphery of the side of the first annular diaphragm 21 facing the second vibration system 3 is connected with the bottom wall of the first mounting groove 1141. By providing the first mounting groove 1141, part of the first auxiliary magnet 114 can protrude out 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 generating device 100. In addition, by providing the first mounting groove 1141, the inner periphery of the first annular diaphragm 21 is sealingly connected with the bottom wall of the first mounting groove 1141, thereby playing a certain waterproof role. It should be noted that the first mounting groove 1141 is an annular mounting groove.

[0053] According to an embodiment of the present application, the protruding part 1142 passes through the inner hole of the first ring-shaped diaphragm 21 and abuts against the inner wall of the shell 6 towards the first ring-shaped diaphragm 21, the inner wall of the shell 6 is also connected with the side wall of the magnetic circuit system 1, the height of the top surface of the first ring-shaped diaphragm 21 is not higher than the height of the top surface of the protruding part 1142, so that the shell 6 and the first vibration system 2 enclose the first sound cavity 62. The inner wall of the shell 6 abuts against the top surface of the protruding part 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, and the height of the top surface of the first ring-shaped diaphragm 21 is not higher than the height of the top surface of the protruding part 1142, thereby ensuring that the first ring-shaped diaphragm 21 has a vibration space, so that the shell 6 and the first vibration system 2 enclose the first sound cavity 62.

[0054] In an embodiment, the shell 6 comprises a shell body and a metal sheet 641, the shell body is provided with a mounting hole at the top for accommodating the metal sheet 641, the metal sheet 641 is protruded towards one side of the first ring-shaped diaphragm 21 to form an abutting protrusion 6411, the abutting protrusion 6411 abuts against the top surface of the magnetic circuit system 1, the shell body and the metal sheet 641 enclose an accommodating cavity capable of accommodating the magnetic circuit system 1, the first vibration system 2 and the second vibration system 3, the inner wall of the shell body is also connected with the side wall of the magnetic circuit system 1, the side wall of the shell body is provided with a side sound hole 63, and the shell body is provided with a front sound hole 61 towards the second diaphragm 31A. The metal sheet 641 can be a steel sheet 641A, which is protruded downwards to abut against the top surface of the magnetic circuit system 1, so that the steel sheet 641A improves the stability of the magnetic circuit system 1 without interfering with the first ring-shaped diaphragm 21.

[0055] In an embodiment, the shell body further comprises a body part and a cover 66, the body part is provided with a mounting hole at the top, the side wall of the body part is provided with a side sound hole 63, and the cover 66 covers the second vibration system 3 and is provided with a front sound hole 61. When the sound production device 100 is applied to a mobile phone, the cover 66 is used to abut against the middle frame of the mobile phone, and the diaphragm of the second vibration system 3 is also protected to a certain extent.

[0056] According to another embodiment of the present application, the body part comprises a first shell 64 and a second shell 65 which are detachably connected, the first shell 64 is also provided with a side sound hole 63, the first shell 64 and the second shell 65 enclose an accommodating cavity capable of accommodating the magnetic circuit system 1, the first vibration system 2 and the second vibration system 3, and the first shell 64 is provided with a steel sheet 641A.

[0057] In an embodiment, the sound production device 100 comprises 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, which improves 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, achieving better low-leakage effect.

[0058] Please refer to FIG. 4 and FIG. 5. In an embodiment, the center magnetic circuit comprises a center magnet 111, a secondary center magnet 112, and a first auxiliary magnet 114. The secondary center magnet 112 is arranged around the outer periphery of the center magnet 111 and spaced to form a second magnetic gap 117. The side magnet 113 is arranged around the outer periphery of the secondary center magnet 112 and spaced to form a first magnetic gap 116. The first auxiliary magnet 114 is arranged on the side of the center magnet 111 facing the first ring-shaped diaphragm 21. The inner periphery of the side of the first ring-shaped diaphragm 21 facing the second vibration system 3 is connected with the first auxiliary magnet 114. In this embodiment, by adding the first auxiliary magnet 114, the number of magnets of the magnetic circuit system 1 of the sound production device 100 is increased, which helps to improve the performance of the sound production device 100. In addition, taking the first ring-shaped diaphragm 21 as an example, the inner periphery of the first ring-shaped diaphragm 21 abuts against the first auxiliary magnet 114, which helps to improve the stability of the first ring-shaped diaphragm 21.

[0059] In an embodiment, the first annular vibrating 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 vibrating system 2 comprises a first ball top 23, the first ball top 23 is connected with the first annular vibrating 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 vibrating diaphragm 31A is sequentially provided with a second inner folding ring 311 and a second outer folding ring 312 from inside to outside, the second vibrating system 3 comprises a second ball top 33, the second ball top 33 is connected with the second vibrating diaphragm 31A, 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 vibrating diaphragm 21 or on the lower side of the first annular vibrating diaphragm 21. When the first ball top 23 is located on the upper side of the first annular vibrating diaphragm 21, one side of the first annular vibrating diaphragm 21 is connected with the first voice coil 22, and the other side of the first annular vibrating 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 vibrating diaphragm 21, one side of the first ball top 23 is connected with the first annular vibrating 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.

[0060] In an embodiment, the first inner folding ring 211 is protrudingly arranged away from the second vibrating diaphragm 31A, and the first outer folding ring 212 is protrudingly arranged towards the second vibrating diaphragm 31A; the second inner folding ring 311 is protrudingly arranged away from the first annular vibrating diaphragm 21, and the second outer folding ring 312 is protrudingly arranged towards the first annular vibrating diaphragm 21. At present, the existing ordinary vibrating diaphragm generally only has a ring-shaped protrusion on the periphery, and in the present embodiment, taking the first annular vibrating diaphragm 21 as an example, the first annular vibrating 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 vibrating diaphragm 21, but also can reserve more space for the first annular vibrating diaphragm 21 and the center magnet 111 due to the protruding of the first inner folding ring 211, that is, 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 vibrating diaphragm 31A is similar, and will not be described here.

[0061] In an embodiment, the sub-center magnet 112 comprises a ring-shaped sub-center magnet; and / or, the side magnet 113 comprises a ring-shaped side magnet. Wherein, the ring-shaped sub-center magnet 112 has a larger volume compared to two strip-shaped magnets arranged at intervals, and thus can improve the performance of the sound generating device 100; the ring-shaped side magnet 113 can further improve the performance of the sound generating device 100 compared to two strip-shaped magnets.

[0062] According to an embodiment of the present application, the sub-center magnet 112 and the side magnet 113 can be a folded side magnet, or two strip-shaped magnets, which have a lower cost compared to a ring-shaped magnet.

[0063] According to an embodiment of the present application, the sub-center magnet 112 and the side magnet 113 can be a folded side magnet, or two strip-shaped magnets, which have a lower cost compared to a ring-shaped magnet.

[0064] In an embodiment, the magnetic circuit system 1 further comprises a magnetic conductive plate assembly 12, the magnetic conductive plate assembly 12 comprises a first magnetic conductive plate 121 and a second magnetic conductive plate 122, the center magnet 111 and the sub-center magnet 112 are connected to the first magnetic conductive plate 121 away from one side of the first ring-shaped diaphragm 21, the other side of the first magnetic conductive plate 121 is connected to the first auxiliary magnet 114; the sub-center magnet 112 and the side magnet 113 are connected to the second magnetic conductive plate 122 towards one side of the first ring-shaped diaphragm 21. By connecting the center magnet 111 and the sub-center magnet 112 through the first magnetic conductive plate 121, the center magnet 111 and the sub-center magnet 112 ensure the magnetic flux of the second magnetic gap 117 through the magnetic conduction of the first magnetic conductive plate 121, so that the sound emitted by the sound generating device 100 is more accurate, and similarly, by connecting the sub-center magnet 112 and the side magnet 113 through the second magnetic conductive plate 122, the sub-center magnet 112 and the side magnet 113 ensure the magnetic flux of the first magnetic gap 116 through the magnetic conduction of the second magnetic conductive plate 122, so that the sound of the sound generating device 100 is more accurate.

[0065] 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. By arranging the third magnetic conductive plate 123 between the center magnet 111 and the second auxiliary magnet 115, 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. By arranging the edge magnetic conductive plate 124 connected to the edge magnet 113, 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 a ring-shaped support together with the first annular mounting frame 41, and the outer edge of the first annular diaphragm is connected to the ring-shaped support. By arranging the first annular mounting frame 41 to fix the outer edge of the first annular diaphragm 21, the stability of the first annular diaphragm 21 is improved; or the edge magnetic conductive plate 124 is protruded upward to form a first fixing part, the first fixing part is a ring-shaped 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 a ring-shaped support, and the outer edge of the first annular diaphragm 21 is connected to the ring-shaped support, thereby improving the stability of the first annular diaphragm 21.

[0066] According to an embodiment of the present application, the outer edge of the first annular diaphragm 21 is connected to the ring-shaped support, thereby improving the stability of the first annular diaphragm 21.

[0067] 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.

[0068] Please refer to FIG. 4 to FIG. 7, in an embodiment, the outer edge of the side magnet 113 protrudes towards the second diaphragm 31A to form a second fixing part, the outer edge of the second diaphragm 31A is connected with the second fixing part; or the second magnetic conduction plate 122 protrudes towards the second diaphragm 31A to form a third fixing part, the third fixing part is connected with the outer edge of the second diaphragm 31A; or the outer edge of the side magnet 113 protrudes towards the second diaphragm 31A to form a fourth fixing part 1131, the sound generating device 100 further comprises a second annular mounting frame 42, the second annular mounting frame 42 is arranged on the side of the fourth fixing part 1131 towards the second sub-magnet 115, and the outer edge of the second diaphragm 31A is connected with the second annular mounting frame 42. Wherein, the outer edge of the side magnet 113 protrudes downwards to form the second fixing part, the second fixing part can not only be used to fix the outer edge of the second diaphragm 31A, but also the volume of the side magnet 113 is increased due to the protrusion of the side magnet 113 downwards, thereby improving the performance of the sound generating device 100; or the second magnetic conduction plate 122 protrudes downwards to form the third fixing part, the third fixing part is connected with the outer edge of the second diaphragm 31A, thereby improving the stability of the second diaphragm 31A; or the side magnet 113 protrudes downwards to form the fourth fixing part 1131, the second annular mounting frame 42 is arranged on the inner side of the fourth fixing part 1131, the fourth fixing part 1131 can not only limit the second annular 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 31A is connected with the second mounting frame, thereby improving the stability of the second diaphragm 31A.

[0069] It should be noted that the first annular mounting frame 41 and the second annular mounting frame 42 are plastic frames, which can avoid the short circuit risk caused by the conduction of the frame itself compared with the metal frame.

[0070] 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 diaphragm 31A. 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.

[0071] In an embodiment, the second auxiliary magnet 115 has a dimension extending in the first direction in the horizontal plane that is greater than the dimension of the center magnet 111 extending in the first direction, and the second auxiliary magnet 115 has a dimension extending in the second direction in the horizontal plane that is greater than the dimension of the center magnet 111 extending in the second direction. The first auxiliary 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 auxiliary 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.

[0072] In an embodiment, the first auxiliary magnet 114 is provided with a first avoiding portion, and / or the second auxiliary magnet is provided with a second avoiding portion. The first avoiding portion is provided on the first auxiliary magnet 114 to avoid the vibration space of the first ring-shaped diaphragm 21, and the second avoiding portion is provided on the second auxiliary magnet 115 to avoid the vibration space of the second diaphragm 31A. It should be noted that the first avoiding portion and the second avoiding portion can be a chamfer or an avoiding groove.

[0073] Referring to FIGS. 4 and 5, in an embodiment, the center magnetic circuit further includes a second auxiliary magnet 115, the first auxiliary magnet 114 and the second auxiliary magnet 115 are oppositely arranged on both 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, and one side of the second diaphragm 31A facing the first ring-shaped diaphragm 21 is connected to the second auxiliary magnet 115. In this embodiment, by adding the second auxiliary magnet 115, the number of magnets of the magnetic circuit system 1 of the sound production device 100 is increased, thereby helping to improve the performance of the sound production device 100. In addition, the second diaphragm 31A includes a second ring-shaped diaphragm 31, and the inner periphery of the second ring-shaped diaphragm 31 abuts against the first auxiliary magnet 114, thereby helping to improve the stability of the first ring-shaped diaphragm 21. It should be noted that the size of the portion of the first auxiliary magnet 114 protruding into the inner circle of the first ring-shaped diaphragm 21 is adapted to the size of the inner circle of the first ring-shaped diaphragm 21, and the size of the portion of the second auxiliary magnet 115 protruding into the inner circle of the second ring-shaped diaphragm 31 is adapted to the size of the inner circle of the second ring-shaped diaphragm 31. It should be noted that the second diaphragm 31A includes a second ring-shaped diaphragm 31, and the inner periphery of one side of the second ring-shaped diaphragm 31 is connected to the second auxiliary magnet 115.

[0074] According to an embodiment of the present application, the first diaphragm 21A and the second diaphragm 31A are different in size and shape, and the first dome 23 and the second dome 33 are different in size and shape, wherein the first diaphragm 21A and the second diaphragm 31A are different in size and shape, on one hand, so as to make the first diaphragm 21A adapt to the size of the first sub-magnet 114 and the second diaphragm 31A adapt to the size of the second sub-magnet 115, effectively utilize the space, on the other hand, so as to make the effective vibration area of the first diaphragm 21A equal to the effective vibration area of the second diaphragm 31A. 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.

[0075] Please refer to FIG. 3 and FIG. 10, in an embodiment, the second diaphragm 31A comprises a second annular diaphragm 31, the outer edge of the second sub-magnet 115 is provided with a second mounting groove, and the inner periphery of the side of the second annular diaphragm 31 facing the first annular diaphragm 21 is connected with the bottom wall of the second mounting groove. By setting the second mounting groove, a part of the second sub-magnet 115 can protrude out through the inner ring of the second annular diaphragm 31, thereby effectively increasing the volume of the second sub-magnet 115, and further improving the performance of the sound production device 100, and by setting the second mounting groove, the vibration space of the second annular diaphragm 31 can be avoided, and the probability of interference between the second annular diaphragm 31 and the second sub-magnet 115 is reduced.

[0076] According to an embodiment of the present application, the inner periphery of the side of the second annular diaphragm 31 facing the first diaphragm 21A is connected with the bottom surface of the magnetic circuit system 1. The bottom surface of the magnetic circuit system 1 is located above the second annular diaphragm 31, that is, the bottom surface of the magnetic circuit system 1 protrudes from the inner ring of the second annular diaphragm 31, which makes the inner ring aperture of the second annular diaphragm 31 not too large, and ensures the strength of the second annular diaphragm 31.

[0077] Please refer to FIG. 3 to FIG. 5, according to an embodiment of the present application, the second vibration system 3 comprises a second dome 33, the second dome 33 is connected with the second diaphragm 31A, and the second dome 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 dome 33.

[0078] According to an embodiment of the present application, the first annular vibrating diaphragm 21 and the second vibrating diaphragm 31A are different in size and shape, and the first dome 23 and the second dome 33 are different in size and shape. The first annular vibrating diaphragm 21 and the second vibrating diaphragm 31A are different in size and shape, on the one hand, to enable the first annular vibrating diaphragm 21 to match the size of the first sub-magnet 114 and the second vibrating diaphragm 31A to match the size of the second sub-magnet 115, effectively utilizing the space, and on the other hand, to enable the effective vibrating area of the first annular vibrating diaphragm 21 to be equal to the effective vibrating area of the second vibrating diaphragm 31A. It should be noted that the effective vibrating area refers to the effective vibrating area of the drum paper / vibrating diaphragm in the vibrating process of the sound production device 100.

[0079] Referring to FIGS. 3-5, in an embodiment, the sound production device 100 further comprises a partition 5 provided with a plurality of air holes 51, and the partition 5 is arranged around the outer periphery of the side magnet 113 and connected with the side magnet 113. By arranging the partition 5 around the outer periphery of the side magnet 113, the sound absorption particles are isolated 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 partition 5 can ensure the flow of gas while preventing the sound absorption particles from entering the inside of the sound production device.

[0080] Referring to FIGS. 3, 8 and 9, in an embodiment, the first annular vibrating diaphragm 21 is provided with a first conductive layer 213, the sound production device 100 comprises a first annular mounting frame 41, the first annular mounting frame 41 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 vibrating diaphragm 31A is provided with a second conductive layer 313, the sound production device 100 comprises a second annular mounting frame 42, the second annular mounting frame 42 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 be electrically connected with the solder pad, compared with the ordinary vibrating diaphragm, the first conductive layer 213 in the present 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.

[0081] In an embodiment, the first vibrating diaphragm 21A and the vibrating diaphragm of the second vibrating system 3 have the same effective vibrating area. The first vibrating diaphragm 21A and the second vibrating diaphragm 31A have the same effective vibrating area, which can further reduce the leakage effect and improve the privacy of the call when the sound production device 100 is applied to electronic devices with call privacy. It should be noted that the first vibrating system 2 and the second vibrating system 3 have the same or similar TS parameters and performance.

[0082] 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 the horizontal direction, compared with the existing 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, that is, the size in the up-down direction is smaller, thereby better adapting to the use scene with smaller installation space, and being beneficial 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 the 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 FIG. 1.

[0083] The present application also provides an electronic device, which comprises a shell and the sound generating device 100. The electronic device can be a wearable electronic device, for example, a watch. In addition, the electronic device can also be a headset, a mobile phone, a bracelet, a notebook computer, a VR (Virtual Reality) device, an AR (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.

[0084] 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, direct / indirect application in other related technical fields within the technical concept of the present application, and the contents of the present application specification and drawings are 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 lower 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 of the housing is provided with a side sound outlet hole communicating with the first sound cavity. The side of the housing facing the second diaphragm is provided with a front sound outlet hole. The housing and the second vibration system form a second sound cavity, and the second sound cavity communicates with the front sound outlet hole. The top surface of the central magnetic circuit is provided with a protrusion, which abuts against the housing. The first annular diaphragm is arranged around the protrusion.

2. The sound-generating device as described 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.

3. The sound-generating device as described in claim 1, characterized in that, The protrusion passes through the inner hole of the first annular diaphragm and abuts against the inner wall of the housing facing the first annular diaphragm.

4. The sound-generating device as described in claim 3, characterized in that, The housing includes a housing body and a metal sheet. The top of the housing body has a mounting hole for accommodating the metal sheet. The metal sheet protrudes towards the side of the first annular diaphragm to form an abutment protrusion. The abutment protrusion abuts against the protrusion portion. The housing body and the metal sheet form a cavity capable of accommodating the magnetic circuit system, the first vibration system, and the second vibration system. The side of the housing body has a side sound outlet hole, and the side of the housing body facing the second diaphragm has a front sound outlet hole.

5. The sound-generating device as described in claim 4, characterized in that, The shell body also includes a body part and a cover body. The top of the body part is provided with the mounting hole, and the side of the body part is provided with the side sound outlet hole. The cover body covers the second vibration system and is provided with the front sound outlet hole.

6. 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.

7. 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 second diaphragm is provided with a second inner fold ring and a second outer fold ring 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 fold ring and the second outer fold ring.

8. The sound-generating device as claimed in claim 7, 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.

9. The sound-generating device as described in any one of claims 1 to 8, characterized in that, The central magnetic circuit includes a central magnet, a secondary central magnet, and a first auxiliary magnet. The first auxiliary magnet has a protrusion on the side opposite to the central 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 periphery of the first annular diaphragm facing the second diaphragm is connected to the first auxiliary magnet.

10. The sound-generating device as claimed in claim 9, 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.

11. The sound-generating device as claimed in claim 10, 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.

12. The sound-generating device as claimed in claim 11, 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.

13. The sound-generating device as claimed in claim 9, 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.

14. The sound-generating device as claimed in claim 10, 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.

15. The sound-generating device as claimed in claim 9, 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.

16. The sound-generating device as described in any one of claims 1 to 8, 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.

17. The sound-generating device as claimed in any one of claims 1 to 8, characterized in that, The first annular diaphragm and the second diaphragm have the same effective vibration area.

18. The sound-generating device as claimed in any one of claims 1 to 8, 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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