Sound production monomer and electronic equipment

Abstract

The utility model belongs to the technical field of electro-acoustic conversion, and particularly relates to a sounding monomer and electronic equipment. The sound production monomer comprises a shell, and a magnetic circuit system and a vibration system which are accommodated in the shell; the magnetic circuit system comprises a first magnetic gap and a second magnetic gap which are coaxially arranged; the vibration system comprises a first vibration unit and a second vibration unit which are coaxially arranged and located on the two opposite sides of the magnetic circuit system respectively, the first vibration unit comprises a first vibrating diaphragm and a first voice coil connected to the first vibrating diaphragm, and the second vibration unit comprises a second vibrating diaphragm and a second voice coil connected to the second vibrating diaphragm; wherein the first vibrating diaphragm comprises a first folding ring, the second vibrating diaphragm comprises a second folding ring, the first folding ring and the second folding ring are folded along the vibration direction of the vibration system, and the first voice coil is at least partially inserted into the first magnetic gap; the second voice coil is at least partially inserted into the second magnetic gap. According to the utility model, the sound quality effect can be ensured under the condition that the thickness of the sound production single body is not increased excessively.

Description

Technical Field

[0001] The utility model belongs to the technical field of electroacoustic conversion, and particularly relates to a sound-generating unit and an electronic device. Background Art

[0002] In recent years, users have increasingly demanded higher sound quality from electronic devices. As the speaker is a crucial component of speakers in electronic devices, the requirements for its sound quality are also increasing. Furthermore, with the trend toward ultra-thin electronic devices, improving the sound quality of speaker drivers without excessively increasing their thickness has become a pressing issue.

[0003] Therefore, in view of the above shortcomings, the present invention is proposed. Utility Model Content

[0004] The purpose of the present invention is to provide a sound unit and an electronic device to further improve the sound quality of the sound unit.

[0005] The first aspect of the present invention provides a sound-emitting unit, comprising a magnetic circuit system and a vibration system, wherein the magnetic circuit system comprises a first magnetic gap and a second magnetic gap arranged coaxially, wherein the second magnetic gap surrounds the outside of the first magnetic gap; the vibration system comprises a first vibration unit and a second vibration unit arranged coaxially and respectively located on opposite sides of the magnetic circuit system, wherein the first vibration unit comprises a first diaphragm and a first voice coil connected to the first diaphragm, and the second vibration unit comprises a second diaphragm and a second voice coil connected to the second diaphragm; wherein,

[0006] The first diaphragm includes a first fold ring, and the second diaphragm includes a second fold ring. The first fold ring and the second fold ring are both folded along the vibration direction of the vibration system. The first voice coil is at least partially inserted into the first magnetic gap; the second voice coil is at least partially inserted into the second magnetic gap.

[0007] The sound-emitting unit provided by the utility model may also have the following additional technical features:

[0008] In a specific embodiment of the present invention, in a first working state, the first vibration unit and the second vibration unit radiate sound waves of the same phase outwardly, and in a second working state, the first vibration unit and the second vibration unit radiate sound waves of opposite phases outwardly.

[0009] In a specific embodiment of the present invention, both the first diaphragm and the second diaphragm are conductive diaphragms.

[0010] In a specific embodiment of the present invention, the magnetic circuit system includes:

[0011] A first magnetic conductive plate, wherein the first magnetic conductive plate is annular;

[0012] an annular magnet, the annular magnet being disposed on a side of the first magnetic conductive plate facing the second vibration unit;

[0013] A side magnet, the side magnet being disposed on the first magnetic conductive plate and annularly disposed outside the annular magnet and spaced apart from the annular magnet to form a second magnetic gap with an opening facing the second diaphragm;

[0014] a second magnetic conductive plate, the second magnetic conductive plate being fixed to a side of the annular magnet facing away from the first magnetic conductive plate;

[0015] A central magnet is fixed to the second magnetic conductive plate and is located in the middle of the annular magnet, and is spaced from the annular magnet to form the first magnetic gap with its opening facing the first diaphragm.

[0016] In a specific embodiment of the present invention, the annular magnet includes an annular magnetic steel, the central magnet includes a central magnetic steel and a central magnetic conductive plate fixed to the central magnetic steel facing the first diaphragm, the side magnet includes a side magnetic steel and a side magnetic conductive plate fixed to the side of the side magnetic steel away from the first magnetic conductive plate, the magnetization direction of the central magnetic steel is opposite to the magnetization direction of the annular magnetic steel and the same as the magnetization direction of the side magnetic steel, and both are parallel to the vibration direction of the vibration system.

[0017] In a specific embodiment of the present invention, the first diaphragm further includes a first vibration plate, and the second diaphragm further includes a second vibration plate;

[0018] When the first vibration plate is arranged in a plate shape and the second vibration plate is arranged in a ring shape, a counter magnetic steel is provided on a side of the first magnetic conductive plate away from the side magnetic steel, the magnetization direction of the counter magnetic steel is the same as the magnetization direction of the side magnetic steel, and the counter magnetic steel ring is arranged on the outer periphery of the first diaphragm, and / or a counter magnetic steel is provided on a side of the second magnetic conductive plate away from the center magnetic steel, the magnetization direction of the counter magnetic steel is the same as the magnetization direction of the center magnetic steel, and the second diaphragm ring is arranged on the outer periphery of the counter magnetic steel;

[0019] Alternatively, when both the first vibration plate and the second vibration plate are arranged in an annular shape, a counter magnetic steel is provided on a side of the second magnetic conductive plate facing away from the central magnetic steel, the magnetization direction of the counter magnetic steel is the same as the magnetization direction of the central magnetic steel, and the counter magnetic steel ring is arranged on the outer periphery of the first diaphragm, and / or a counter magnetic steel is provided on a side of the central magnetic conductive plate facing away from the central magnetic steel, the magnetization direction of the counter magnetic steel is opposite to the magnetization direction of the central magnetic steel, and the first diaphragm ring is arranged on the outer periphery of the counter magnetic steel;

[0020] Alternatively, when the first vibration plate is arranged in a ring shape and the second vibration plate is arranged in a plate shape, a counter magnetic steel is provided on a side of the central magnetic conductive plate facing away from the central magnetic steel, the magnetization direction of the counter magnetic steel is opposite to the magnetization direction of the central magnetic steel, and the first diaphragm ring is arranged on the outer periphery of the counter magnetic steel;

[0021] Alternatively, when the first vibration plate and the second vibration plate are both arranged in a plate shape, a counter magnetic steel is provided on the side of the first magnetic conductive plate away from the edge magnetic steel, the magnetizing direction of the counter magnetic steel is the same as the magnetizing direction of the edge magnetic steel, and the counter magnetic steel ring is arranged on the outer periphery of the first vibration membrane, and / or, a counter magnetic steel is provided on the side of the side magnetic conductive plate away from the edge magnetic steel, the magnetizing direction of the counter magnetic steel is opposite to the magnetizing direction of the edge magnetic steel, and the counter magnetic steel ring is arranged on the outer periphery of the second vibration membrane.

[0022] In a specific embodiment of the present invention, when the first vibration plate is arranged in a plate shape and the second vibration plate is arranged in a ring shape, the first fold ring is connected to the first magnetic conductive plate, the second fold ring includes a second inner fold ring located on the inner periphery of the second vibration plate and a second outer fold ring located on the outer periphery of the second vibration plate, the second inner fold ring is connected to the second magnetic conductive plate, and the second outer fold ring is connected to the side magnetic conductive plate;

[0023] Alternatively, when the first vibration plate and the second vibration plate are both arranged in an annular shape, the first fold ring includes a first inner fold ring located at the inner periphery of the first vibration plate and a first outer fold ring located at the outer periphery of the first vibration plate, the second fold ring includes a second inner fold ring located at the inner periphery of the second vibration plate and a second outer fold ring located at the outer periphery of the second vibration plate, the first inner fold ring is connected to the central magnetic conductive plate, the first outer fold ring is connected to the first magnetic conductive plate, the second inner fold ring is connected to the second magnetic conductive plate, and the second outer fold ring is connected to the side magnetic conductive plates;

[0024] Alternatively, when the first vibration plate is arranged in a ring shape and the second vibration plate is arranged in a plate shape, the first folding ring includes a first inner folding ring located on the inner periphery of the first vibration plate and a first outer folding ring located on the outer periphery of the first vibration plate, the first inner folding ring is connected to the center magnetic conductive plate, the first outer folding ring is connected to the first magnetic conductive plate, and the second folding ring is connected to the side magnetic conductive plate; or, when the first vibration plate and the second vibration plate are both arranged in a plate shape, the first folding ring is connected to the first magnetic conductive plate, and the second folding ring is connected to the side magnetic conductive plate.

[0025] In a specific implementation manner of the present invention, the pair of magnetic steels is provided with an avoidance portion.

[0026] In a specific embodiment of the present invention, the first diaphragm further includes a first vibration plate, the second diaphragm further includes a second vibration plate, and the area ratio of the first vibration plate to the second vibration plate is S, wherein 0.1≤S≤10; and / or

[0027] A ratio of a length of the first voice coil to a length of the second voice coil is a, a ratio of a width of the first voice coil to a width of the second voice coil is b, and a ratio of a height of the first voice coil to a height of the second voice coil is c, wherein 0.1≤a≤10, 0.1≤b≤10, and 0.1≤c≤10.

[0028] The second aspect of the present invention further provides an electronic device, comprising any one of the above-mentioned sound-emitting units.

[0029] The sound-emitting unit provided by the present invention is provided with a magnetic circuit system and a vibration system including a first vibration unit and a second vibration unit, and the first vibration unit and the second vibration unit are arranged on both sides of the magnetic circuit system. In this way, the first vibration unit and the second vibration unit can be driven by the magnetic circuit system to produce sound, thereby forming the sound-emitting unit into a double-sided sound-emitting unit, further enriching the sound quality effect of the sound-emitting unit, and thus improving the low-frequency and high-frequency performance. By making the first diaphragm of the first vibration unit include a first fold ring, and the second diaphragm of the second vibration unit include a second fold ring, and the first fold ring and the second fold ring are both folded along the vibration direction of the vibration system, the maximum linear displacement of the first diaphragm and the second diaphragm can be increased, and the radiation area of ​​the first diaphragm and the second diaphragm can be increased, so that the sound quality effect can be maintained even when the thickness of the sound-emitting unit is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 This is a schematic diagram of the cross-sectional structure of a sound-emitting unit in a specific embodiment of the present utility model;

[0032] Figure 2 This is a schematic diagram of the cross-sectional structure of a sound-emitting unit in a specific embodiment of the present utility model;

[0033] Figure 3 This is a schematic diagram of the cross-sectional structure of a sound-emitting unit in a specific embodiment of the present utility model;

[0034] Figure 4This is a schematic diagram of the cross-sectional structure of a sound-emitting unit in a specific embodiment of the present utility model;

[0035] Figure 5 This is a schematic diagram of the cross-sectional structure of a sound-emitting unit in a specific embodiment of the present utility model;

[0036] Figure 6 This is a schematic diagram of the cross-sectional structure of a sound-emitting unit in a specific embodiment of the present utility model;

[0037] Figure 7 This is a schematic diagram of the cross-sectional structure of a sound-emitting unit in a specific embodiment of the present invention.

[0038] Description of reference numerals:

[0039] 100-sounding unit;

[0040] 10- housing,

[0041] 20-magnetic circuit system, 21-magnetic yoke, 22-center magnet, 221-center magnetic steel, 222-center magnetic plate, 23-ring magnet, 24-side magnet, 241-side magnetic steel, 242-side magnetic plate, 25-second magnetic plate, 26-second pair of magnetic structures;

[0042] 30 - vibration system, 31 - first vibration unit, 32 - first vibration plate, 33 - first voice coil, 34 - first folding ring, 35 - second vibration unit, 36 - second vibration plate, 37 - second folding ring, 38 - second voice coil. DETAILED DESCRIPTION

[0043] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0044] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0045] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0046] For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," and the like. Such spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, an element described as "below" or "below" another element or feature would then be oriented as "above" or "above" another element or feature. Thus, the example term "below" can include both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein are interpreted accordingly.

[0047] Reference Figure 1-Figure 7 The sound-emitting unit 100 provided in the first aspect of the present invention improves the vibration system 30 , thereby effectively improving the sound quality of the sound-emitting unit 100 .

[0048] Specifically, the sound-emitting unit 100 provided by the embodiment of the present invention includes a magnetic circuit system 20 and a vibration system 30. The magnetic circuit system 20 includes a first magnetic gap and a second magnetic gap arranged coaxially, and the second magnetic gap surrounds the outside of the first magnetic gap; the vibration system 30 includes a first vibration unit 31 and a second vibration unit 35 arranged coaxially and located on opposite sides of the magnetic circuit system 20, respectively. The first vibration unit 31 includes a first diaphragm and a first voice coil 33 connected to the first diaphragm, and the second vibration unit 35 includes a second diaphragm and a second voice coil 38 connected to the second diaphragm; wherein, the first diaphragm includes a first fold ring 34, and the second diaphragm includes a second fold ring 37. The first fold ring 34 and the second fold ring 37 are both folded along the vibration direction of the vibration system 30, and the first voice coil 33 is at least partially inserted into the first magnetic gap; the second voice coil 38 is at least partially inserted into the second magnetic gap.

[0049] A coaxially arranged first magnetic gap and a second magnetic gap are formed in the magnetic circuit system 20, wherein the side of the magnetic circuit system 20 facing the first vibration unit 31 is the first side surface, and the side of the magnetic circuit system 20 facing the second vibration unit 35 is the second side surface. The opening direction of the first magnetic gap is toward the first side surface, and the opening direction of the second magnetic gap is toward the second side surface.

[0050] The first vibration unit 31 is arranged on the first side of the magnetic circuit system 20 and is inserted into the first magnetic gap through the first voice coil 33. The second vibration unit 35 is arranged on the second side of the magnetic system and is inserted into the second side gap through the second voice coil 38. In this way, when powered on, the magnetic circuit system 20 can respectively drive the first vibration unit 31 and the second vibration unit 35 to vibrate and make sound along the central axis direction of the magnetic circuit system 20.

[0051] It is understandable that the first vibration unit 31 and the second vibration unit 35 in the sound-emitting unit 100 can vibrate and produce sound individually or in combination, and the specific choice can be made according to needs.

[0052] Since the first diaphragm of the first vibration unit 31 includes a first fold ring 34, and the second diaphragm of the second vibration unit 35 includes a second fold ring 37, and the first fold ring 34 and the second fold ring 37 are both folded along the vibration direction of the vibration system 30, the maximum linear displacement of the first fold ring 34 and the second fold ring 37 can be increased, thereby increasing the vibration range of the first diaphragm and the second diaphragm. At the same time, since the first fold ring 34 and the second fold ring 37 are connected to the sides of the first diaphragm and the second diaphragm, the restriction of the first fold ring 34 and the second fold ring 37 on the area of ​​the first diaphragm and the second diaphragm can be released, so that the first diaphragm and the second diaphragm have a larger radiation area, which can further improve the sound quality of the sound unit 100.

[0053] The sound-emitting unit 100 provided by the embodiment of the present invention is provided with a magnetic circuit system 20 and a vibration system 30 including a first vibration unit 31 and a second vibration unit 35, and the first vibration unit 31 and the second vibration unit 35 are arranged on both sides of the magnetic circuit system 20. In this way, the magnetic circuit system 20 can drive the first vibration unit 31 and the second vibration unit 35 to produce sound, thereby forming the sound-emitting unit 100 into a double-sided sound-emitting unit 100, further enriching the sound quality of the sound-emitting unit 100 and improving the low-frequency and high-frequency performance. By making the first diaphragm of the first vibration unit 31 include a first fold 34, and the second diaphragm of the second vibration unit 35 include a second fold 37, and by making the first fold 34 and the second fold 37 folded along the vibration direction of the vibration system 30, the maximum linear displacement of the first diaphragm and the second diaphragm can be increased, and the radiation area of ​​the first diaphragm and the second diaphragm can be increased, thereby maintaining the sound quality of the sound-emitting unit 100 while reducing its thickness.

[0054] In one embodiment, the sound unit 100 has a first working state. At this time, the first vibration unit and the second vibration unit radiate sound waves with the same phase outward. The two sound waves are superimposed and transmitted, which can enhance the loudness of the sound unit 100.

[0055] In another embodiment, the sound-emitting unit 100 has a second working state. At this time, the first vibration unit and the second vibration unit radiate sound waves with opposite phases outward. The two sound waves cancel each other out, avoiding sound leakage and effectively protecting privacy.

[0056] In one embodiment, both the first and second diaphragms are conductive, meaning they are provided with conductive paths. The first and second voice coils 33 and 38 are electrically connected to an external circuit via these paths. This eliminates the need for a relief structure in the magnetic circuit system, further improving the BL value of the magnetic circuit system 20 and significantly enhancing overall performance and sound quality.

[0057] In one embodiment, the magnetic circuit system 20 includes a first magnetic conductive plate 21, an annular magnet 23, a side magnet 24, a second magnetic conductive plate 25 and a central magnet 22, wherein the first magnetic conductive plate 21 is annular; the annular magnet 23 is arranged on the side of the first magnetic conductive plate 21 facing the second vibration unit 35; the side magnet 24 is arranged on the first magnetic conductive plate 21, and the side magnet 24 is arranged on the outside of the annular magnet 23, and is spaced from the annular magnet 23 to form a second magnetic gap with an opening direction facing the second vibration membrane; the second magnetic conductive plate 25 is fixed to the side of the annular magnet 23 away from the first magnetic conductive plate 21; the central magnet 22 is fixed to the second magnetic conductive plate 25 and is located in the middle of the annular magnet 23, and is spaced from the annular magnet 23 to form a first magnetic gap with an opening direction facing the first vibration membrane.

[0058] Specifically, the first magnetic conductive plate 21 and the second magnetic conductive plate 25 are arranged in parallel and connected as a whole via the annular magnet 23 located between the first magnetic conductive plate 21 and the second magnetic conductive plate 25. The inner edge of the first magnetic conductive plate 21 is consistent with the inner edge contour of the annular magnet 23, and the outer edge of the second magnetic conductive plate 25 is consistent with the outer edge contour of the annular magnet 23. The side magnets 24 are strip-shaped and there are two of them. The two side magnets 24 are respectively arranged on the outside of the annular magnet 23 corresponding to the long sides of the annular magnet 23 and connected to the first magnetic conductive plate 21. In this way, the side magnets 24 and the annular magnet 23 can form a second magnetic gap that opens toward the second vibration unit 35. The center magnet 22 is located in the middle of the annular magnet 23 and is connected to the second magnetic conductive plate 25. In this way, the center magnet 22 and the annular magnet 23 can form a first magnetic gap that opens toward the first diaphragm.

[0059] The above structure is not only simple, but also can realize that the first magnetic gap and the second magnetic gap are coaxially arranged with the opening directions facing the two sides of the magnetic circuit system 20.

[0060] In one embodiment, the annular magnet 23 includes an annular magnet, the central magnet 22 includes a central magnet 221 and a central magnetic conductive plate 222 fixed to the central magnet 221 facing the first diaphragm, the side magnet 24 includes a side magnet 241 and a side magnetic conductive plate 242 fixed to the side of the side magnet 241 facing away from the first magnetic conductive plate 21, and the magnetization direction of the central magnet 221 is opposite to the magnetization direction of the annular magnet and the same as the magnetization direction of the side magnet 241, and both are parallel to the vibration direction of the vibration system 30.

[0061] Specifically, the outer contours of the central magnetic steel 221 and the central magnetic conductive plate 222 are substantially the same, and the outer contours of the side magnetic steel 241 and the side magnetic conductive plate 242 are substantially the same. Furthermore, the thickness of the central magnetic conductive plate 222 and the side magnetic conductive plate 242 are slightly smaller than the thickness of the first magnetic conductive plate 21 and the second magnetic conductive plate 25.

[0062] In one embodiment, the housing 10 is further included, and the housing 10 and the magnetic conductive plate 242 are integrally formed by injection molding. This achieves the connection between the housing 10 and the magnetic circuit system 20, and the above structure is conducive to improving the production efficiency of the sound unit 100.

[0063] In one embodiment, Figure 1 As shown, the first diaphragm further includes a first vibration plate 32, and the second diaphragm further includes a second vibration plate 36; when the first vibration plate 32 is arranged in a plate shape and the second vibration plate 36 is arranged in a ring shape, a counter magnetic steel 26 is provided on the side of the first magnetic conductive plate 21 away from the edge magnetic steel 241, and the magnetization direction of the counter magnetic steel 26 is the same as the magnetization direction of the edge magnetic steel 241. The counter magnetic steel 26 is arranged in a ring around the outer periphery of the first diaphragm, and / or, as shown Figure 3As shown, a counter magnet 26 is provided on the side of the second magnetic conductive plate 25 away from the central magnet 221 . The magnetizing direction of the counter magnet 26 is the same as that of the central magnet 221 . The second diaphragm ring is provided on the outer periphery of the counter magnet 26 .

[0064] In one embodiment, if Figure 2 As shown, when the first vibration plate 32 and the second vibration plate 36 are both arranged in a ring shape, a counter magnet 26 is provided on the side of the second magnetic conductive plate 25 away from the central magnet 221, the magnetizing direction of the counter magnet 26 is the same as the magnetizing direction of the central magnet 221, and the counter magnet 26 is arranged in a ring around the outer periphery of the first diaphragm, and / or, a counter magnet 26 is provided on the side of the central magnetic conductive plate 222 away from the central magnet 221, the magnetizing direction of the counter magnet 26 is opposite to the magnetizing direction of the central magnet 221, and the first diaphragm is arranged in a ring around the counter magnet 26.

[0065] In one embodiment, if Figure 4 As shown, when the first vibration plate 32 is arranged in a ring shape and the second vibration plate 36 is arranged in a plate shape, a counter magnet 26 is provided on the side of the central magnetic conductive plate 222 away from the central magnet 221. The magnetization direction of the counter magnet 26 is opposite to the magnetization direction of the central magnet 221, and the first vibration ring is arranged on the outer periphery of the counter magnet 26.

[0066] In one embodiment, if Figure 5-7 As shown, when the first vibration plate 32 and the second vibration plate 36 are both arranged in a plate shape, a counter magnet 26 is provided on the side of the first magnetic conductive plate 21 away from the side magnetic steel 241, the magnetizing direction of the counter magnet 26 is the same as the magnetizing direction of the side magnetic steel 241, and the counter magnet 26 is arranged around the periphery of the first vibration membrane, and / or, a counter magnet 26 is provided on the side of the side magnetic conductive plate 242 away from the side magnetic steel 241, the magnetizing direction of the counter magnet 26 is opposite to the magnetizing direction of the side magnetic steel 241, and the counter magnet 26 is arranged around the periphery of the second vibration membrane.

[0067] Specifically, the first diaphragm 32 is connected to the first voice coil 33 and first fold 34 on the side facing the magnetic circuit system 20, while the second diaphragm 36 is connected to the second voice coil 38 and second fold 37 on the side facing the magnetic circuit system 20. Because the first and second diaphragms 32, 36 are located on either side of the magnetic circuit system 20 and do not interfere with each other, they can be freely configured as either a plate or ring structure as needed. Furthermore, by combining the shapes of the first and second diaphragms 32, 36 with the counter-magnetic steel 26, the BL value of the magnetic circuit system 20 can be further increased, significantly enhancing overall performance and sound quality.

[0068] In one embodiment, Figure 1 and 3As shown, when the first vibration plate 32 is arranged in a plate shape and the second vibration plate 36 is arranged in a ring shape, the first fold ring 34 is connected to the first magnetic conductive plate 21, and the second fold ring 37 includes a second inner fold ring located on the inner periphery of the second vibration plate 36 and a second outer fold ring located on the outer periphery of the second vibration plate 36, the second inner fold ring is connected to the second magnetic conductive plate 25, and the second outer fold ring is connected to the edge magnetic conductive plate 242.

[0069] In one embodiment, if Figure 2 As shown, when the first vibration plate 32 and the second vibration plate 36 are both arranged in a ring shape, the first fold ring 34 includes a first inner fold ring located at the inner periphery of the first vibration plate 32 and a first outer fold ring located at the outer periphery of the first vibration plate 32, and the second fold ring 37 includes a second inner fold ring located at the inner periphery of the second vibration plate 36 and a second outer fold ring located at the outer periphery of the second vibration plate 36. The first inner fold ring is connected to the center magnetic conductive plate 222, the first outer fold ring is connected to the first magnetic conductive plate 21, the second inner fold ring is connected to the second magnetic conductive plate 25, and the second outer fold ring is connected to the side magnetic conductive plate 242.

[0070] In one embodiment, if Figure 4 As shown, when the first vibration plate 32 is arranged in a ring shape and the second vibration plate 36 is arranged in a plate shape, the first fold ring 34 includes a first inner fold ring located at the inner periphery of the first vibration plate 32 and a first outer fold ring located at the outer periphery of the first vibration plate 32, the first inner fold ring is connected to the center magnetic conductive plate 222, the first outer fold ring is connected to the first magnetic conductive plate 21, and the second fold ring 37 is connected to the side magnetic conductive plate 242.

[0071] In one embodiment, if Figure 5-7 As shown, when the first vibration plate 32 and the second vibration plate 36 are both arranged in a plate shape, the first fold ring 34 is connected to the first magnetic conductive plate 21 , and the second fold ring 37 is connected to the side magnetic conductive plate 242 .

[0072] Through the above arrangement, the connection between the first vibration unit 31 , the second vibration unit 35 and the magnetic circuit system 20 can be achieved.

[0073] In one embodiment, the counter-magnetic steel 26 is provided with a relief portion. Specifically, when the first vibration plate 32 is plate-shaped, the counter-magnetic steel 26 disposed around its periphery is provided with a relief portion for circumventing the first vibration unit 31, thereby avoiding interference with the first vibration unit 31.

[0074] In a specific embodiment of the present invention, the area ratio of the first vibration plate 32 to the second vibration plate 36 is S, wherein 0.1≤S≤10; and / or

[0075] The ratio of the length of the first voice coil 33 to the length of the second voice coil 38 is a, the ratio of the width of the first voice coil 33 to the width of the second voice coil 38 is b, and the ratio of the height of the first voice coil 33 to the height of the second voice coil 38 is c, where 0.1≤a≤10, 0.1≤b≤10, and 0.1≤c≤10.

[0076] Based on the above structure, the flexibility of the sound unit 100 can be further improved, thereby obtaining a sound unit 100 with different sound quality effects.

[0077] A second aspect of the present invention further provides an electronic device comprising any of the aforementioned sound-emitting units 100. The specific structure of the sound-emitting unit 100 is referenced above. Since the electronic device in this embodiment comprises the sound-emitting units 100 of all the aforementioned embodiments, it at least possesses all the beneficial effects of the aforementioned sound-emitting units 100, and therefore will not be further elaborated here.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sound-emitting unit, characterized in that: The invention comprises a magnetic circuit system and a vibration system, wherein the magnetic circuit system comprises a first magnetic gap and a second magnetic gap arranged coaxially, wherein the second magnetic gap surrounds the outside of the first magnetic gap; the vibration system comprises a first vibration unit and a second vibration unit arranged coaxially and located on opposite sides of the magnetic circuit system, wherein the first vibration unit comprises a first diaphragm and a first voice coil connected to the first diaphragm, and the second vibration unit comprises a second diaphragm and a second voice coil connected to the second diaphragm; wherein, The first diaphragm includes a first fold ring, and the second diaphragm includes a second fold ring. The first fold ring and the second fold ring are both folded along the vibration direction of the vibration system. The first voice coil is at least partially inserted into the first magnetic gap; the second voice coil is at least partially inserted into the second magnetic gap.

2. The sound-emitting unit according to claim 1, characterized in that: In the first working state, the first vibration unit and the second vibration unit radiate sound waves of the same phase outwardly. In the second working state, the first vibration unit and the second vibration unit radiate sound waves of opposite phases outwardly.

3. The sound-emitting unit according to claim 1, characterized in that: The first diaphragm and the second diaphragm are both conductive diaphragms.

4. The sound-emitting unit according to claim 1, characterized in that: The magnetic circuit system comprises: A first magnetic conductive plate, wherein the first magnetic conductive plate is annular; an annular magnet, the annular magnet being disposed on a side of the first magnetic conductive plate facing the second vibration unit; A side magnet, the side magnet being disposed on the first magnetic conductive plate and annularly disposed outside the annular magnet and spaced apart from the annular magnet to form a second magnetic gap with an opening facing the second diaphragm; a second magnetic conductive plate, the second magnetic conductive plate being fixed to a side of the annular magnet facing away from the first magnetic conductive plate; A central magnet is fixed to the second magnetic conductive plate and is located in the middle of the annular magnet, and is spaced from the annular magnet to form the first magnetic gap with its opening facing the first diaphragm.

5. The sound-emitting unit according to claim 4, characterized in that: The annular magnet includes an annular magnetic steel, the central magnet includes a central magnetic steel and a central magnetic conductive plate fixed to the central magnetic steel facing the first diaphragm, the side magnet includes a side magnetic steel and a side magnetic conductive plate fixed to the side of the side magnetic steel away from the first magnetic conductive plate, the magnetization direction of the central magnetic steel is opposite to the magnetization direction of the annular magnetic steel and the same as the magnetization direction of the side magnetic steel, and both are parallel to the vibration direction of the vibration system.

6. The sound-emitting unit according to claim 5, characterized in that: The first diaphragm further includes a first vibration plate, and the second diaphragm further includes a second vibration plate; When the first vibration plate is arranged in a plate shape and the second vibration plate is arranged in a ring shape, a counter magnetic steel is provided on a side of the first magnetic conductive plate away from the side magnetic steel, the magnetization direction of the counter magnetic steel is the same as the magnetization direction of the side magnetic steel, and the counter magnetic steel ring is arranged on the outer periphery of the first diaphragm, and / or a counter magnetic steel is provided on a side of the second magnetic conductive plate away from the center magnetic steel, the magnetization direction of the counter magnetic steel is the same as the magnetization direction of the center magnetic steel, and the second diaphragm ring is arranged on the outer periphery of the counter magnetic steel; Alternatively, when both the first vibration plate and the second vibration plate are arranged in an annular shape, a counter magnetic steel is provided on a side of the second magnetic conductive plate facing away from the central magnetic steel, the magnetization direction of the counter magnetic steel is the same as the magnetization direction of the central magnetic steel, and the counter magnetic steel ring is arranged on the outer periphery of the first diaphragm, and / or a counter magnetic steel is provided on a side of the central magnetic conductive plate facing away from the central magnetic steel, the magnetization direction of the counter magnetic steel is opposite to the magnetization direction of the central magnetic steel, and the first diaphragm ring is arranged on the outer periphery of the counter magnetic steel; Alternatively, when the first vibration plate is arranged in a ring shape and the second vibration plate is arranged in a plate shape, a counter magnetic steel is provided on a side of the central magnetic conductive plate facing away from the central magnetic steel, the magnetization direction of the counter magnetic steel is opposite to the magnetization direction of the central magnetic steel, and the first diaphragm ring is arranged on the outer periphery of the counter magnetic steel; Alternatively, when the first vibration plate and the second vibration plate are both arranged in a plate shape, a counter magnetic steel is provided on the side of the first magnetic conductive plate away from the edge magnetic steel, the magnetizing direction of the counter magnetic steel is the same as the magnetizing direction of the edge magnetic steel, and the counter magnetic steel ring is arranged on the outer periphery of the first vibration membrane, and / or, a counter magnetic steel is provided on the side of the side magnetic conductive plate away from the edge magnetic steel, the magnetizing direction of the counter magnetic steel is opposite to the magnetizing direction of the edge magnetic steel, and the counter magnetic steel ring is arranged on the outer periphery of the second vibration membrane.

7. The sound-emitting unit according to claim 6, characterized in that: When the first vibration plate is arranged in a plate shape and the second vibration plate is arranged in a ring shape, the first fold ring is connected to the first magnetic conductive plate, the second fold ring includes a second inner fold ring located on the inner periphery of the second vibration plate and a second outer fold ring located on the outer periphery of the second vibration plate, the second inner fold ring is connected to the second magnetic conductive plate, and the second outer fold ring is connected to the side magnetic conductive plate; Alternatively, when the first vibration plate and the second vibration plate are both arranged in an annular shape, the first fold ring includes a first inner fold ring located at the inner periphery of the first vibration plate and a first outer fold ring located at the outer periphery of the first vibration plate, the second fold ring includes a second inner fold ring located at the inner periphery of the second vibration plate and a second outer fold ring located at the outer periphery of the second vibration plate, the first inner fold ring is connected to the central magnetic conductive plate, the first outer fold ring is connected to the first magnetic conductive plate, the second inner fold ring is connected to the second magnetic conductive plate, and the second outer fold ring is connected to the side magnetic conductive plates; Alternatively, when the first vibration plate is arranged in a ring shape and the second vibration plate is arranged in a plate shape, the first folding ring includes a first inner folding ring located on the inner periphery of the first vibration plate and a first outer folding ring located on the outer periphery of the first vibration plate, the first inner folding ring is connected to the center magnetic conductive plate, the first outer folding ring is connected to the first magnetic conductive plate, and the second folding ring is connected to the side magnetic conductive plate; or, when the first vibration plate and the second vibration plate are both arranged in a plate shape, the first folding ring is connected to the first magnetic conductive plate, and the second folding ring is connected to the side magnetic conductive plate.

8. The sound-emitting unit according to claim 6, characterized in that: The pair of magnetic steels is provided with an avoidance portion.

9. The sound-emitting unit according to claim 1, characterized in that: The first diaphragm further includes a first vibration plate, the second diaphragm further includes a second vibration plate, and an area ratio of the first vibration plate to the second vibration plate is S, wherein 0.1≤S≤10; and / or A ratio of a length of the first voice coil to a length of the second voice coil is a, a ratio of a width of the first voice coil to a width of the second voice coil is b, and a ratio of a height of the first voice coil to a height of the second voice coil is c, wherein 0.1≤a≤10, 0.1≤b≤10, and 0.1≤c≤10.

10. An electronic device, characterized in that: The invention comprises the sound-emitting unit described in any one of claims 1 to 9.

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