Acoustic device and electronic apparatus

Abstract

The utility model belongs to the technical field of electroacoustic conversion, and particularly relates to an acoustic device and electronic equipment, the acoustic device comprises a magnetic circuit system and a vibration system, the magnetic circuit system comprises a magnetic conductive yoke and two sets of magnetic groups arranged on the magnetic conductive yoke, each set of magnetic group comprises three magnetic parts which are arranged at intervals to form a magnetic gap, and the two magnetic gaps are arranged side by side; the vibration system comprises a vibrating diaphragm assembly and two voice coils, the vibrating diaphragm assembly and the magnetic circuit system are oppositely arranged, the two voice coils are arranged side by side, one ends of the two voice coils are connected to the vibrating diaphragm assembly, and the other ends of the two voice coils are located in the two magnetic gaps respectively; wherein the magnetic parts are vertically magnetized, and the magnetizing directions of every two adjacent magnetic parts are opposite; the current direction of one voice coil is clockwise, and the current direction of the other voice coil is anticlockwise. The acoustic device provided by the utility model has lower electromagnetic radiation, so that the electromagnetic radiation interference on the whole electronic equipment is smaller, and the performance of the whole electronic equipment is further improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electric -acoustic conversion technical field, and concretely relates to an acoustic device and electronic equipment. BACKGROUND

[0002] In order to adapt the light and thin development trend of intelligent device, acoustic device also needs synchronous light and thin development.For guaranteeing the acoustic performance of light and thin setting acoustic device, the related technology provides a kind of acoustic device of double voice coil collocation five magnetite.Although the acoustic device can guarantee its acoustic performance while reducing thickness, but due to the same current direction of double voice coil, electromagnetic effect generated by double voice coil will interfere with other parts of the whole machine when normally working, and then affect the overall performance of the whole machine.Therefore, how to reduce the electromagnetic interference of acoustic device becomes the technical problem to be solved currently.

[0003] In view of the above shortcomings, the utility model is provided. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of acoustic device and electronic equipment to at least partially reduce the electromagnetic interference problem in acoustic device.

[0005] The utility model provides a kind of acoustic device in the first aspect, comprising:

[0006] Magnetic circuit system, including magnetic yoke and two sets of magnetic groups arranged in the magnetic yoke, each set of magnetic group includes three magnetic parts arranged at intervals to form magnetic gap, and two magnetic gaps are arranged side by side;

[0007] Vibration system, including diaphragm assembly and two voice coils, the diaphragm assembly is arranged opposite to the magnetic circuit system, two voice coils are arranged side by side, and one end of two voice coils is connected to the diaphragm assembly, and the other end is located in two magnetic gaps respectively;Wherein,

[0008] The magnetic part is vertically magnetized, and the magnetization direction of adjacent two magnetic parts is opposite;The current direction of one voice coil is clockwise, and the current direction of another voice coil is counterclockwise.

[0009] The acoustic device provided by the utility model can also have the following additional technical effects:

[0010] In one specific embodiment of the utility model, each set of magnetic group includes center magnetic part, side magnetic part and intermediate magnetic part, the center magnetic part is located between the side magnetic part and the intermediate magnetic part, and the intermediate magnetic parts of two sets of magnetic groups are arranged adjacent;Wherein

[0011] The intermediate magnetic part includes intermediate magnet, the center magnetic part includes center magnet and center magnetic plate arranged in layers, and the side magnetic part includes side magnet and side magnetic plate arranged in layers.

[0012] In one embodiment of the present application, the height of the intermediate magnet is not less than the height of the central magnetic part, and the height of the edge magnetic part is not greater than the height of the central magnetic part.

[0013] In one embodiment of the present application, the intermediate magnetic part further comprises an intermediate magnetic conducting plate arranged on the side of the intermediate magnet away from the magnetic conducting yoke, and the intermediate magnetic conducting plate is opposite to the central magnetic conducting plate.

[0014] In one embodiment of the present application, the distance between the two intermediate magnetic parts is not less than 0.5 mm; and / or

[0015] The width of the intermediate magnetic part, the edge magnetic part and the intermediate magnetic part is arranged in a decreasing manner.

[0016] In one embodiment of the present application, the shell has a first side and a second side arranged oppositely, the first side is connected with the diaphragm assembly, and the second side is connected with the magnetic circuit system.

[0017] In one embodiment of the present application, the diaphragm assembly comprises a ring-shaped diaphragm and a vibrating plate, the diaphragm comprises an outer fixed part, a folded ring part and an inner fixed part from outside to inside in sequence, the outer fixed part is connected with the shell, and the inner fixed part is connected with the vibrating plate.

[0018] In one embodiment of the present application, the folded ring part comprises a first folded ring and a second folded ring connected with the inner edge of the first folded ring, and the recess directions of the first folded ring and the second folded ring are opposite; and / or

[0019] The vibrating plate is formed with a ring-shaped protrusion facing the magnetic circuit system, and the voice coil is connected on the ring-shaped protrusion.

[0020] In one embodiment of the present application, a plurality of centering supporting sheets are further included, one end of each centering supporting sheet is connected with the shell, and the other end is connected with at least one voice coil.

[0021] The centering supporting sheet comprises a first centering supporting sheet with two spot welding pads and a second centering supporting sheet with four spot welding pads; the voice coil comprises a first voice coil and a second voice coil, the outgoing line end of the first voice coil is connected with the spot welding pad of the first centering supporting sheet, the incoming line end of the first voice coil is connected with the spot welding pad of the second centering supporting sheet, the incoming line end of the second voice coil is connected with the spot welding pad of the first centering supporting sheet, and the outgoing line end of the second voice coil is connected with the spot welding pad of the second centering supporting sheet.

[0022] A second aspect of this invention also provides an electronic device, including any of the acoustic devices described above.

[0023] The acoustic device of this invention employs a magnetic circuit system with magnetic gaps and a vibration system in which voice coils are inserted into the magnetic gaps. This allows the voice coils to drive the diaphragm assembly to vibrate and produce sound when energized, thus enabling the acoustic device to generate sound. Furthermore, by providing two magnetic gaps and two corresponding voice coils, the effective length for driving the voice coils in the magnetic circuit system is increased, thereby improving the driving force coefficient (BL) of the acoustic device. This enhances the sound quality of the acoustic device and offsets the impact of thinning the device's thickness on its performance, ensuring the sound quality of the slim electronic device. In addition, since the magnetic components are vertically magnetized and adjacent magnetic components are magnetized in opposite directions, and the current directions of the two voice coils are opposite, the inductance generated during energized vibration cancels each other out, resulting in lower electromagnetic radiation. This reduces the electromagnetic radiation of the acoustic device and minimizes electromagnetic interference to the entire electronic device. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a three-dimensional structural diagram of the acoustic device in the embodiment of this utility model;

[0026] Figure 2 for Figure 1 The main view;

[0027] Figure 3 As one embodiment Figure 2 Sectional view of AA;

[0028] Figure 4 for Figure 3 Simulation diagram of magnetic flux density in the medium magnetic circuit system;

[0029] Figure 5 for Figure 3 Exploded view of the acoustic device in the middle section;

[0030] Figure 6 This is a three-dimensional structural diagram of the acoustic device from another perspective in an embodiment of this utility model.

[0031] 100 - Acoustic device;

[0032] 10 - Shell;

[0033] 20 - magnetic circuit system, 21 - magnetic yoke, 211 - avoiding slot; 22 - intermediate magnet, 23 - center magnetic part, 231 - center magnet, 232 - center magnetic plate, 24 - edge magnetic part, 241 - edge magnet, 242 - edge magnetic plate;

[0034] 30 - vibration system, 31 - diaphragm assembly, 311 - diaphragm, 312 - vibrating plate; 32 - voice coil, 321 - first voice coil, 322 - second voice coil, 33 - centering bracket, 331 - first centering bracket, 332 - second centering bracket, 333 - spot welding pad. DETAILED DESCRIPTION

[0035] Exemplary embodiments of the present application will be described herein below with reference to the accompanying drawings. While exemplary embodiments of the present application are illustrated, it is to be understood that the present application is not limited to the exemplary embodiments described herein, but is applicable to any modifications, equivalents, or substitutes for these exemplary embodiments. Rather, these embodiments are provided to enable those skilled in the art to more completely and completely understand the present application, and to convey the full scope of the present application to those skilled in the art.

[0036] It is to be understood that the terms used herein are merely for the purpose of describing particular embodiments and are by no means to be taken as limiting the present application. As used herein, the singular form "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are to be construed as containing, comprising, including or having, but not excluding any additional item, feature, step, procedure, component or element. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. The methods described herein do not require the described or illustrated steps to be performed in the order recited, unless explicitly stated otherwise.

[0037] Although the terms first, second, third, and the like can be used herein to describe various 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 be only used to differentiate one element, component, region, layer or section from another region, layer or section. Terms such as "first", "second", and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0038] For the sake of description, spatial relative terms can be used herein for the purpose of describing one element or feature's relationship to another element or feature as illustrated in the figures. Such relative terms include, for example, "internal," "external," "lateral," "medial," "under," "below," "above," "on," and the like. These spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device is inverted, then an element described as "below" or "beneath" another element or feature would then be oriented "above" or "over" the other element or feature. Thus, the example term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0039] The acoustic device 100 provided by the embodiment of the utility model can be used for electronic equipment, and makes the electronic equipment have sound emitting function, meanwhile, the acoustic device 100 of the embodiment of the utility model has weak electromagnetic effect, thereby further reducing electromagnetic radiation interference to the whole machine of the electronic equipment.

[0040] With reference to Figures 1-6 The acoustic device 100 provided by the first aspect of the utility model comprises a magnetic circuit system 20 and a vibration system 30, the magnetic circuit system 20 comprises a magnetic yoke 21 and two sets of magnetic groups arranged on the magnetic yoke 21, each set of magnetic groups comprises three magnetic parts arranged at intervals to form a magnetic gap, and the two magnetic gaps are arranged side by side; the vibration system 30 comprises a diaphragm assembly 31 and two voice coils 32, the diaphragm assembly 31 is arranged opposite to the magnetic circuit system 20, the two voice coils 32 are arranged side by side, one end of the two voice coils 32 is connected to the diaphragm assembly 31, and the other end is arranged in the two magnetic gaps respectively; wherein the magnetic parts are vertically magnetized, and the magnetization directions of the two adjacent magnetic parts are opposite; the current direction of one of the two voice coils 32 is clockwise, and the current direction of the other voice coil 32 is counterclockwise.

[0041] Specifically, the acoustic device 100 is formed in a substantially cuboid shape, the length direction is the long axis, the width direction is the short axis, and the thickness direction is the vibration direction of the vibration system 30. Correspondingly, the magnetic circuit system 20 and the vibration system 30 also have long and short axes, and the long axes of the magnetic circuit system 20 and the vibration system 30 are arranged corresponding to the long axis of the acoustic device 100, and the short axes of the magnetic circuit system 20 and the vibration system 30 are arranged corresponding to the long axis of the acoustic device 100.

[0042] The magnetic circuit system 20 includes two sets of magnetic groups each having three magnetic portions, the three magnetic portions in each magnetic group are in the shape of a strip, the three magnetic portions are arranged side by side in the short axis direction and each extends in the long axis direction of the magnetic circuit system 20, so that the gap between the three magnetic portions can form a magnetic gap filled with magnetization, and the magnetic gap is in the shape of a ring. The two sets of magnetic groups can form two magnetic gaps, and the two magnetic gaps are arranged side by side in the short axis direction.

[0043] The diaphragm assembly 31 in the vibration system 30 is arranged in a coaxial manner with the magnetic circuit system 20, the two voice coils 32 each extend in the long axis direction and are arranged side by side in the short axis direction, one end of the two voice coils 32 is connected to the diaphragm assembly 31, and the other end is respectively inserted into the two magnetic gaps. Since the magnetic gap has a magnetic field, when the voice coil 32 is energized, it will be subjected to the magnetic field force and can vibrate in the magnetic gap, thereby driving the diaphragm assembly 31 to vibrate and produce sound.

[0044] Since the magnetic gap and the voice coil 32 in the embodiment are both two, compared with the single voice coil 32 structure, the embodiment can increase the length of the voice coil 32 in the magnetic gap, increase the effective length of the magnetic circuit system 20 for driving the voice coil 32 to vibrate, that is, improve the driving force coefficient (BL) of the acoustic device 100, thereby improving the sound quality effect of the acoustic device 100. Correspondingly, when the thickness of the acoustic device 100 is thinned, the above-mentioned improvement brought by the setting of two magnetic gaps and voice coils 32 can offset the influence of the thickness reduction on the performance of the acoustic device 100, thereby ensuring the sound quality effect of the light and thin electronic equipment.

[0045] In addition, since the current directions of the two voice coils 32 in the embodiment are clockwise and counterclockwise, that is, the current directions of the two voice coils 32 are opposite, the electromagnetic energy generated when the two voice coils 32 are energized and vibrate can be offset, thereby having smaller electromagnetic radiation. Compared with the scheme in which the current directions of the two voice coils 32 are the same, the embodiment can reduce the electromagnetic radiation of the acoustic device 100 and reduce the electromagnetic radiation interference on the whole electronic equipment. The setting mode that the magnetic portions are vertically magnetized and the magnetization directions of the adjacent two magnetic portions are opposite can provide magnetic field protection for the two voice coils 32 with opposite charging directions, ensure that the directions of the forces generated by the two voice coils 32 acting on the magnetic field at the same time are the same, and further make the vibration directions of the two voice coils 32 at the same time are the same.

[0046] The acoustic device 100 of the embodiment of the utility model can drive the vibration of the voice coil 32 through the magnetic gap system 20 and the vibration system 30, and the voice coil 32 can drive the vibration of the diaphragm assembly 31 to generate sound when energized, so that the acoustic device 100 has the sound generating function. Meanwhile, two magnetic gaps and two corresponding voice coils 32 are arranged, so that the effective length for driving the vibration of the voice coil 32 in the magnetic gap system 20 is increased, that is, the driving force coefficient (BL) of the acoustic device 100 is improved, so that the sound quality effect of the acoustic device 100 is improved, and the above improvement can offset the influence of the thickness reduction of the acoustic device 100 on the performance of the acoustic device 100, so as to ensure the sound quality effect of the light and thin electronic equipment. In addition, since the magnetic parts are vertically magnetized and the magnetization directions of the adjacent two magnetic parts are opposite, the current directions of the two voice coils 32 are opposite, so that the electric energy generated when the voice coil is energized and vibrates can be offset, so that the electromagnetic radiation is small, so that the electromagnetic radiation of the acoustic device 100 can be reduced, and the electromagnetic radiation interference on the whole electronic equipment can be reduced.

[0047] In one embodiment, the magnetic gap system 20 further comprises a magnetic yoke 21, and the two sets of magnetic groups are arranged on the side of the magnetic yoke 21 facing the vibration system 30.

[0048] Specifically, the magnetic yoke 21 is a plate structure in a rectangular shape, and is made of a magnetic conductive material. The two sets of magnetic groups are arranged on the side of the magnetic yoke 21 facing the vibration system 30, so that two parallel magnetic gaps are formed.

[0049] In one embodiment, the magnetic yoke 21 is provided with a relief groove 211 corresponding to the magnetic gap. In this way, the height of the magnetic gap can be further increased to increase the vibration space of the voice coil 32, so that the amplitude of the voice coil 32 can be improved, that is, the amplitude of the vibration system 30 can be improved, and the sound quality effect can be improved.

[0050] In one embodiment, each set of magnetic group comprises a center magnetic part 23, a side magnetic part 24 and an intermediate magnetic part, the center magnetic part 23 is located between the side magnetic part 24 and the intermediate magnetic part, and the intermediate magnetic parts of the two sets of magnetic groups are arranged adjacent to each other; wherein the intermediate magnetic part comprises an intermediate magnet 22, the center magnetic part 23 comprises a center magnet 231 and a center magnetic plate 232 arranged in layers, and the side magnetic part 24 comprises a side magnet 241 and a side magnetic plate 242 arranged in layers.

[0051] The outer contour of the center magnet 231 and the center magnetic conducting plate 232 is the same, one side of the center magnet 231 is bonded to the magnetic conducting yoke 21, and the other side is bonded to the center magnetic conducting plate 232. The outer contour of the side magnet 241 and the side magnetic conducting plate 242 on the side facing the magnetic gap is substantially the same, and one side of the side magnet 241 is bonded to the magnetic conducting yoke 21, and the other side is bonded to the side magnetic conducting plate 242. The intermediate magnetic part only includes the intermediate magnet 22, and the side facing the magnetic conducting yoke 21 is bonded to the magnetic conducting yoke 21.

[0052] In this embodiment, the intermediate magnetic part is only provided as the intermediate magnet 22, and the intermediate magnetic conducting plate is omitted, so that the process of the magnetic circuit system 20 can be simplified, thereby improving the processing efficiency of the magnetic circuit system 20 and improving the processing efficiency of the acoustic device 100.

[0053] Of course, in other embodiments, the intermediate magnetic part can also include the intermediate magnet 22 and the intermediate magnetic conducting plate stacked and arranged, and the intermediate magnetic conducting plate is arranged opposite to the center magnetic conducting plate 232. In this way, the magnetic induction lines of the intermediate magnet can be further guided to converge on the magnetic gap, thereby improving the magnetic field performance of the magnetic circuit system.

[0054] In one embodiment, the height of the intermediate magnetic part is not less than the height of the center magnetic part 23, and the height of the side magnetic part 24 is not greater than the height of the center magnetic part 23. Specifically, the height of the intermediate magnet 22 is not less than the height of the center magnetic part 23.

[0055] For example, the height of the intermediate magnetic part is equal to the height of the center magnetic part 23, so that the amplitude of the diaphragm assembly 31 can be ensured when the thickness of the acoustic device 100 is constant. The height of the intermediate magnetic part and the center magnetic part 23 are both greater than the height of the side magnetic part 24, so that the side magnetic part 24 can avoid the folded ring of the diaphragm assembly 31. In this way, the thickness of the side magnetic part 24 can be reduced to increase the amplitude of the diaphragm assembly 31.

[0056] Of course, in other embodiments, the thickness of the intermediate magnetic part, the center magnetic part 23 and the side magnetic part 24 can be equal.

[0057] In one embodiment, the distance between the two intermediate magnetic parts is not less than 0.5mm. For example, the distance between the two intermediate magnetic parts is 0.5mm, 0.55mm, 0.6mm, 0.65mm, 0.7mm, etc. In this way, the mutual interference between the two intermediate magnetic parts can be reduced to a certain extent, thereby improving the magnetic field strength between the intermediate magnetic part and the center magnetic part 23.

[0058] In one embodiment, the widths of the intermediate magnetic portion, the central magnetic portion 23 and the side magnetic portion 24 are arranged in a decreasing manner. Specifically, the widths of the intermediate magnetic body 22, the side magnetic body 241 and the intermediate magnetic body 22 are arranged in a decreasing manner. In this way, the short axis length of the magnetic circuit system 20 can be further reduced, and thus the short axis length of the acoustic device 100 can be reduced, thereby leaving more space for the electronic device and facilitating the spatial layout of the electronic device.

[0059] In one embodiment, the housing 10 is further included, which has a first side and a second side arranged oppositely, the first side is connected with the diaphragm assembly 31, and the second side is connected with the magnetic circuit system 20.

[0060] Specifically, the housing 10 is formed as a hollow rectangular frame structure, and along the axial direction, the housing 10 has a first side and a second side arranged oppositely, the first side is connected with the diaphragm assembly 31, and the second side is connected with the magnetic circuit system 20. For example, the width of the housing 10 along the short axis direction is substantially the same as the maximum distance between the two side magnetic portions 24, and the second side of the housing 10 is connected with the top surface of the side magnetic portion 24 facing the vibration system 30. In this embodiment, the housing 10 and the side flux guide plate 242 are formed as an integrally molded injection molding part, and thus the second side of the housing 10 is connected to the top surface of the side magnetic portion 24 facing the vibration system 30. In this way, the connection strength of the magnetic circuit system 20 and the housing 10 can be improved. Of course, in order to improve the connection between the housing 10 and the magnetic circuit system 20, the second side of the housing 10 can also form a connecting column along the two short axes and be connected to the flux guide yoke 21.

[0061] Of course, in other embodiments, the housing 10 can also be arranged around the side magnetic portion 24 and the second side is connected with the flux guide yoke 21.

[0062] In one embodiment, the diaphragm assembly 31 includes a ring-shaped diaphragm 311 and a vibration plate 312, and the diaphragm 311 includes an outer fixed portion, a folded ring portion and an inner fixed portion in sequence from the outside, the outer fixed portion is connected with the housing 10, and the inner fixed portion is connected with the vibration plate 312.

[0063] Specifically, the outer fixed portion is connected with the first side of the housing 10 by means of adhesion, and in order to improve the connection strength, the outer edge of the outer fixed portion is further folded to form a flange toward one side of the housing 10 to be connected with the side surface of the housing 10.

[0064] In one embodiment, the folded ring portion includes a first folded ring and a second folded ring connected to the inner edge of the first folded ring, and the recess directions of the first folded ring and the second folded ring are opposite.

[0065] Specifically, by arranging the folded ring portion as the first folded ring and the second folded ring and making the recess directions of the two opposite, the linear range of compliance of the diaphragm assembly 21 can be widened to a certain extent, the THD (total harmonic distortion) and the HOHD (high order harmonic distortion) can be reduced, and the sound quality of the acoustic device 100 can be improved.

[0066] For example, the first fold ring is concave to the outside of the shell 10, and the second fold ring is concave to the inside of the shell 10.

[0067] In one embodiment, the vibrating plate 312 is provided with an annular protrusion facing the magnetic circuit system 20, and the voice coil 32 is connected to the annular protrusion. The annular protrusion on the vibrating plate 312 is beneficial to improve the strength of the vibrating plate 312, and is also beneficial to adjust the height of the voice coil 32 so that it can be fully inserted into the magnetic gap, i.e. to increase the effective coil length in the magnetic field, i.e. to improve the driving force coefficient (BL) of the acoustic device 100, thereby improving the sound quality effect of the acoustic device 100.

[0068] In one embodiment, the acoustic device 100 further comprises a plurality of centering branches 33, each of which is connected to the shell 10 at one end and connected to at least one voice coil 32 at the other end; wherein the centering branches 33 include a first centering branch 331 having two spot weld pads 333 and a second centering branch 332 having four spot weld pads 333; the voice coil 32 includes a first voice coil 321 and a second voice coil 322, the outgoing end of the first voice coil 321 is connected to the spot weld pad 333 of the first centering branch 331, the incoming end of the first voice coil 321 is connected to the spot weld pad 333 of the second centering branch 332, the incoming end of the second voice coil 322 is connected to the spot weld pad 333 of the first centering branch 331, and the outgoing end of the second voice coil 322 is connected to the spot weld pad 333 of the second centering branch 332.

[0069] Specifically, the first centering branch 331 and the second centering branch 332 each include a first connecting portion for connecting to the shell 10, a second connecting portion for connecting to the voice coil 32, and a vibrating arm connected between the first connecting portion and the second connecting portion, the two first connecting portions are respectively connected to the second side of the two short shaft ends of the shell 10, and the two second connecting portions are respectively connected to the end portions of the first voice coil 321 and the second voice coil 322 corresponding to the short shafts.

[0070] Meanwhile, the second connecting portion of the first centering branch 331 is provided with two spot weld pads 333, and the two spot weld pads 333 are respectively connected to the outgoing end lead of the first voice coil 321 and the incoming end lead of the second voice coil 322, so as to connect the first voice coil 321 and the second voice coil 322 in series.

[0071] The second connecting portion of the second voice coil 322 is provided with two spot weld pads 333, and the two spot weld pads 333 are respectively connected to the incoming end lead of the first voice coil 321 and the outgoing end lead of the second voice coil 322, and the first connecting portion of the second voice coil 322 is also provided with two spot weld pads 333, each of which is connected to the spot weld pad 333 of one second connecting portion, so as to connect the two voice coils 32 to the external circuit.

[0072] The utility model discloses a second aspect still provides a kind of electronic equipment, including the acoustic device 100 of any one of above described. The structure of acoustic device 100 refers to above described embodiment. Since the electronic equipment in the embodiment includes the acoustic device 100 in all above described embodiments, it also has the beneficial effect of at least above described embodiment, which will not be repeated here.

[0073] The electronic device in the embodiment can be a mobile phone, a tablet, a computer, or a wearable device such as VR or AR.

[0074] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, but not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. An acoustic device, characterized by The acoustic device comprises: a magnetic circuit system comprising a magnetic yoke and two sets of magnetic groups arranged on the magnetic yoke, each set of the magnetic groups comprising three magnetic parts arranged at intervals to form two magnetic gaps arranged side by side; a vibration system comprising a diaphragm assembly and two voice coils, the diaphragm assembly being arranged opposite to the magnetic circuit system, the two voice coils being arranged side by side, one end of each of the two voice coils being connected to the diaphragm assembly, and the other end of each of the two voice coils being arranged in the two magnetic gaps respectively; wherein each of the magnetic parts is vertically magnetized, and the magnetization directions of two adjacent magnetic parts are opposite; the current direction of one of the voice coils is clockwise, and the current direction of the other voice coil is counterclockwise.

2. The acoustic device of claim 1, wherein, Each set of the magnetic groups comprises a center magnetic part, an edge magnetic part and an intermediate magnetic part, the center magnetic part being arranged between the edge magnetic part and the intermediate magnetic part, and the intermediate magnetic parts of the two sets of the magnetic groups being arranged adjacent to each other; wherein the intermediate magnetic part comprises an intermediate magnetic body, the center magnetic part comprises a center magnetic body and a center magnetic plate arranged in layers, and the edge magnetic part comprises an edge magnetic body and an edge magnetic plate arranged in layers.

3. The acoustic device of claim 2, wherein, The height of the intermediate magnetic body is not less than the height of the center magnetic part, and the height of the edge magnetic part is not greater than the height of the center magnetic part.

4. The acoustic device of claim 2, wherein, The intermediate magnetic part further comprises an intermediate magnetic plate arranged on the side of the intermediate magnetic body away from the magnetic yoke, and the intermediate magnetic plate is opposite to the center magnetic plate.

5. The acoustic device of claim 2, wherein, The distance between the two intermediate magnetic parts is not less than 0.5 mm; and / or The widths of the intermediate magnetic part, the edge magnetic part and the intermediate magnetic part are arranged in a decreasing manner.

6. The acoustic device according to any one of claims 1-5, wherein, The acoustic device further comprises a shell having a first side and a second side arranged opposite to each other, the first side being connected to the diaphragm assembly, and the second side being connected to the magnetic circuit system.

7. The acoustic device of claim 6, wherein, The diaphragm assembly comprises a ring-shaped diaphragm and a vibrating plate, the diaphragm comprises an outer fixed part, a folded ring part and an inner fixed part arranged in sequence from outside to inside, the outer fixed part is connected to the shell, and the inner fixed part is connected to the vibrating plate.

8. The acoustic device of claim 7, wherein, The folded ring part comprises a first folded ring and a second folded ring connected to the inner edge of the first folded ring, the recess directions of the first folded ring and the second folded ring are opposite; and / or The vibrating plate is formed with a ring-shaped protrusion facing the magnetic circuit system, and the voice coil is connected to the ring-shaped protrusion.

9. The acoustic device of claim 6, wherein, The acoustic device further comprises a plurality of centering fins, one end of each of the centering fins being connected to the shell, and the other end of each of the centering fins being connected to at least one of the voice coils. The centering fins comprise a first centering fin having two spot weld pads and a second centering fin having four spot weld pads; the voice coils comprise a first voice coil and a second voice coil, the outgoing end of the first voice coil being connected to the spot weld pads of the first centering fin, the incoming end of the first voice coil being connected to the spot weld pads of the second centering fin, the incoming end of the second voice coil being connected to the spot weld pads of the first centering fin, and the outgoing end of the second voice coil being connected to the spot weld pads of the second centering fin.

10. An electronic device, comprising: The acoustic device comprises any one of claims 1-9.

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