Acoustic device and electronic apparatus

Abstract

The utility model belongs to the technical field of electro-acoustic conversion, and particularly relates to an acoustic device and electronic equipment, the acoustic device comprises a shell, and a magnetic circuit system, a first vibration system and a second vibration system which are arranged in the shell, and the first vibration system, the second vibration system, the magnetic circuit system and the shell jointly enclose to form an inner cavity; a first magnetic gap and a second magnetic gap which are communicated with each other are formed in the magnetic circuit system, the first vibration system comprises a first vibrating diaphragm assembly and a first voice coil which are connected with each other, the first voice coil is inserted into the first magnetic gap, the second vibration system comprises a second vibrating diaphragm assembly and a second voice coil which are connected with each other, and the second voice coil is inserted into the second magnetic gap; wherein a sound transmission channel is formed between the first vibrating diaphragm assembly and the second vibrating diaphragm assembly; the sound transmission channel is communicated with the inner cavity and the external space. According to the acoustic device provided by the utility model, the maximum amplitude of the whole machine can be improved and distortion can be reduced in a limited space, so that the sound quality effect can be ensured while the thickness is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of electroacoustic conversion technology, and specifically relates to an acoustic device and electronic equipment. Background Technology

[0002] With the development of acoustic output technology, acoustic devices (such as loudspeakers) have been widely used in people's daily lives. They can be used in conjunction with electronic devices such as mobile phones and computers to provide users with auditory functions. However, as electronic devices become thinner and lighter, the space inside them is getting smaller and smaller. How to achieve the best sound effect within an effective space is a problem that acoustic devices urgently need to solve.

[0003] To address the aforementioned issues, especially given a fixed effective vibration area, loudspeakers typically achieve high performance by increasing their maximum amplitude. However, a larger maximum amplitude increases distortion, introducing new problems. Therefore, increasing the maximum amplitude alone cannot meet the aforementioned requirements.

[0004] Therefore, in view of the above shortcomings, this utility model is proposed. Utility Model Content

[0005] The purpose of this invention is to provide an acoustic device and electronic device to meet the high performance requirements of the acoustic device within an effective space.

[0006] The first aspect of this utility model provides an acoustic device, including a housing and a magnetic circuit system, a first vibration system, and a second vibration system disposed within the housing. The first vibration system, the second vibration system, the magnetic circuit system, and the housing together enclose an inner cavity. The magnetic circuit system forms a first magnetic gap and a second magnetic gap that are interconnected. The first vibration system includes a first diaphragm assembly and a first voice coil connected together, with the first voice coil inserted in the first magnetic gap. The second vibration system includes a second diaphragm assembly and a second voice coil connected together, with the second voice coil inserted in the second magnetic gap. A sound transmission channel is formed between the first diaphragm assembly and the second diaphragm assembly. The sound transmission channel connects the inner cavity to an external space.

[0007] The acoustic device provided by this utility model may also have the following additional technical features:

[0008] In one specific embodiment of this utility model, the housing includes two long axial sides and two short axial sides connecting the two long axial sides. The long axial sides are provided with sound outlet holes, and the sound transmission channel communicates with the external space through the sound outlet holes.

[0009] In one specific embodiment of the present invention, the housing includes a first housing and a second housing joined together along the vibration direction of the first diaphragm assembly and the second diaphragm assembly; the first housing and / or the second housing are provided with grooves on opposite sides corresponding to the long axis side, and the grooves are formed as the sound outlet when the first housing and the second housing are joined together.

[0010] In one specific embodiment of this utility model, the magnetic circuit system includes:

[0011] The magnetic yoke includes a U-shaped load-bearing portion, a support portion extending from the two free ends of the load-bearing portion to both sides, and an annular magnetic plate connected to both ends of the support portion, wherein the annular magnetic plate is connected to the housing.

[0012] A central magnetic component is disposed within the supporting component;

[0013] The edge magnetic part is located outside the central magnetic part and is spaced apart from the central magnetic part.

[0014] In one specific embodiment of this utility model, the central magnetic part includes a central magnet and a central magnetic guide plate stacked on the central magnet, the central magnetic guide plate being located on the side of the central magnet away from the supporting part; the side magnetic part includes a side magnet and a side magnetic guide plate stacked on the side magnet, the side magnetic guide plate being connected to the housing; wherein, a first magnetic gap is formed between the supporting part and the side magnetic part, and a second magnetic gap is formed between the annular magnetic guide plate and the central magnetic guide plate.

[0015] In one specific embodiment of this utility model, there are four side magnets arranged in a ring around the central magnet, and at least one of the side magnets is provided with a clearance hole, through which the sound transmission channel communicates with the external space; or

[0016] A side magnet is provided only in one axial direction of the central magnetic part, and a sound outlet is formed on the housing in the other axial direction.

[0017] In one specific embodiment of this utility model, the first vibration system further includes two first centering supports, which are respectively disposed at the two short shaft ends of the housing. One end of each first centering support is connected to the housing, and the other end is connected to the first voice coil of the first vibration system; and / or,

[0018] The second vibration system further includes a second centering support plate, which is connected between the housing and the second voice coil.

[0019] In one specific embodiment of this utility model, the two first centering supports are sandwiched between the first housing and the second housing; the connecting ring of the second centering support is connected to the side of the second housing opposite to the first housing.

[0020] In one specific embodiment of this utility model, it further includes a housing, the magnetic circuit system, the first vibration component and the second vibration component are all located inside the housing, a first chamber is formed between the housing and the first diaphragm component, a second chamber is formed between the housing and the second diaphragm component, the first chamber and the second chamber are separated, or the first chamber and the second chamber are connected.

[0021] A second aspect of this invention also provides an electronic device, including any of the acoustic devices described above.

[0022] The acoustic device of this invention, by setting up a first vibration system and a second vibration system in a double-sided back-to-back structure, not only increases the overall maximum amplitude of the acoustic device through the first and second vibration systems, but also reduces the maximum amplitude of individual vibration systems within the first and second vibration systems, thereby achieving less distortion and ensuring high-performance sound quality within a limited space. Furthermore, by placing the sound transmission channel between the first and second diaphragm assemblies, with the faces of the first and second diaphragm assemblies facing the rear cavity, the sound generated by the first and second diaphragm assemblies can be superimposed within the sound transmission channel. This achieves a double-sided superposition effect with only one sound transmission channel, significantly reducing the overall structural complexity of the acoustic device and the stacking thickness in the vibration direction, thus reducing material costs and improving the overall adaptability of the acoustic device. Attached Figure Description

[0023] 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.

[0024] Figure 1 This is a three-dimensional structural diagram of the acoustic device in the embodiment of this utility model;

[0025] Figures 2-3 respectively Figure 1 Top view and bottom view;

[0026] Figure 4 for Figure 2Cross-sectional structural diagram;

[0027] Figures 5-6 These are top and bottom views of a portion of the electronic device's structure, showing the acoustic device and its connected housing.

[0028] Figure 7 for Figure 5 Cross-sectional structural diagram

[0029] Figure 8 This is an exploded view of part of the structure of an electronic device.

[0030] Explanation of reference numerals in the attached figures:

[0031] 100 - Acoustic device; 200 - Electronic device; 210 - Housing; 220 - Sound hole;

[0032] 10-Housing shell, 11-Sound outlet, 12-First housing shell, 13-Second housing shell, 14-Groove, 15-Terminal;

[0033] 20-Magnetic circuit system; 21-Magnetic yoke; 211-Bearing part; 212-Supporting part; 213-Annular magnetic plate; 22-Central magnetic part; 221-Central magnet; 222-Central magnetic plate; 23-Side magnetic part; 231-Side magnet; 232-Side magnetic plate;

[0034] 30-First vibration system, 31-First diaphragm assembly, 311-First diaphragm, 312-First diaphragm plate, 32-First voice coil, 33-First centering support, 331-First connecting part, 332-Second connecting part, 333-Spring arm, 334-First solder pad, 335-Second solder pad;

[0035] 40 - Second vibration system, 41 - Second diaphragm assembly, 411 - Second diaphragm, 412 - Second diaphragm plate, 42 - Second voice coil, 43 - Second centering support, 431 - Connecting ring, 432 - Vibrating ring, 433 - Vibrating arm, 434 - Third pad, 435 - Fourth pad. Detailed Implementation

[0036] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0037] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0038] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0039] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0040] This invention provides an acoustic device 100 for use in an electronic device 200, which can provide high-performance auditory functions for the electronic device 200 within a limited space.

[0041] Reference Figures 1-8As shown in the figure, the acoustic device 100 provided in this embodiment of the present invention includes a housing 10, a magnetic circuit system 20, a first vibration system 30, and a second vibration system 40 disposed within the housing 10. The first vibration system 30, the second vibration system 40, the magnetic circuit system 20, and the housing 10 together enclose an inner cavity. The magnetic circuit system 20 forms a first magnetic gap and a second magnetic gap that are interconnected. The first vibration system 30 includes a first diaphragm assembly 31 and a first voice coil 32 connected to each other. The first voice coil 32 is inserted into the first magnetic gap. The second vibration system 40 includes a second diaphragm assembly 41 and a second voice coil 42 connected to each other. The second voice coil 42 is inserted into the second magnetic gap. A sound transmission channel is formed between the first diaphragm assembly 31 and the second diaphragm assembly 41. The sound transmission channel connects the inner cavity with the external space.

[0042] Specifically, the housing 10 is formed as a hollow rectangular frame structure, with its inner cavity forming a receiving cavity. Its length direction is the major axis, its width direction is the minor axis, and its thickness direction is the vibration direction of the first vibration system 30 and the second vibration system 40. Along the vibration direction, the housing 10 includes a first side and a second side disposed opposite to each other.

[0043] The first vibration system 30 includes a first diaphragm assembly 31 and a first voice coil 32 connected to the first diaphragm assembly 31. The second vibration system 40 includes a second diaphragm assembly 41 and a second voice coil 42 connected to the second diaphragm assembly 41. The first diaphragm assembly 31 and the second diaphragm assembly 41 are respectively connected to the first side and the second side of the housing 10. The first voice coil 32 and the second voice coil 42 are arranged opposite to each other.

[0044] The magnetic circuit system 20 is located in the receiving cavity of the housing 10, and is specifically located between the first vibration system 30 and the second vibration system 40. The magnetic circuit system 20 is provided with a first magnetic gap and a second magnetic gap having a magnetic field, and the first magnetic gap and the second magnetic gap are interconnected. The first magnetic gap allows the end of the first voice coil 32 to be inserted, and the end of the second magnetic gap allows the end of the second voice coil 42 to be inserted. Thus, when energized, the first voice coil 32 and the second voice coil 42 can vibrate along the vibration direction under the action of the magnetic field, thereby driving the first diaphragm assembly 31 and the second diaphragm assembly 41 to vibrate and produce sound.

[0045] The first vibration system 30, the second vibration system 40, the magnetic circuit system 20, and the housing 10 together enclose an inner cavity. The cavity enclosed by the first diaphragm assembly 31 and the second diaphragm assembly 41 is a sound transmission channel. This sound transmission channel connects the inner cavity with the external space, thereby enabling the sound generated by the first diaphragm assembly 31 and the second diaphragm assembly 41 to be exported.

[0046] Compared to existing solutions that increase the maximum amplitude of the loudspeaker, the acoustic device 100 in this embodiment sets up a first vibration system 30 and a second vibration system 40 and makes them form a double-sided back-to-back structure. This not only increases the overall maximum amplitude of the acoustic device 100 through the first vibration system 30 and the second vibration system 40, but also reduces the maximum amplitude of the individual vibration systems in the first vibration system 30 and the second vibration system 40, thereby achieving less distortion and ensuring the high-performance sound quality of the acoustic device 100 in an effective space. Meanwhile, in this embodiment, the acoustic device 100 arranges the sound transmission channel between the first diaphragm assembly 31 and the second diaphragm assembly 41, so that the faces of the first diaphragm assembly 31 and the second diaphragm assembly 41 face the rear cavity. In this way, the sound generated by the first diaphragm assembly 31 and the second diaphragm assembly 41 can be superimposed in the sound transmission channel. That is, only one sound transmission channel is needed to achieve the effect of superposition of two sides, which greatly reduces the overall structural complexity of the acoustic device 100 and also reduces the stacking thickness of the acoustic device 100 in the vibration direction, thereby reducing the material cost of the acoustic device 100 and improving the overall adaptability of the acoustic device 100.

[0047] In one embodiment, the housing 10 includes two long axis sides and two short axis sides connecting the two long axis sides. The long axis sides are provided with sound outlet holes 11, and the sound transmission channel communicates with the external space through the sound outlet holes 11.

[0048] In this embodiment, by setting a sound outlet 11 that communicates with the sound transmission channel on the long axis side, it is not only beneficial to increase the size of the sound outlet 11, thereby facilitating the output of sound waves from the first diaphragm assembly 31 and the second diaphragm assembly 41, but also to shorten the propagation path of the sound waves from the first diaphragm assembly 31 and the second diaphragm assembly 41 in the sound transmission channel, thereby reducing the propagation loss of sound waves.

[0049] In one embodiment, the housing 10 includes a first housing 12 and a second housing 12 assembled along the vibration direction of the first diaphragm assembly 31 and the second diaphragm assembly 41; the first housing 12 and / or the second housing 12 are provided with grooves 14 on opposite sides corresponding to the long axis side, and the grooves 14 form sound outlet holes 11 when the first housing 12 and the second housing 12 are assembled.

[0050] Specifically, both the first housing 12 and the second housing 12 are formed as hollow rectangular frame structures, and the first housing 12 and the second housing 12 are coaxially assembled to form a complete housing 10. The side of the first housing 12 facing away from the second housing 12 is the first side, which is adapted to be connected to the outer periphery of the first diaphragm assembly 31; the side of the second housing 12 facing away from the first housing 12 is the second side, which is adapted to be connected to the outer periphery of the second diaphragm assembly 41.

[0051] Furthermore, to improve the connection strength between the first housing 12 and the second housing 12, the opposite sides of the first housing 12 and the second housing 12 are provided with a plurality of interlocking slots and posts.

[0052] The first housing 12 has a groove 14 on its side facing the second housing 12, which forms a sound outlet 11 when the first housing 12 and the second housing 12 are assembled; or the second housing 12 has a groove 1414 on its side facing the first housing 12, which forms a sound outlet 11 when the first housing 12 and the second housing 12 are assembled; or both the first housing 12 and the second housing 12 have grooves 14 on their opposite sides, which form a sound outlet 11 when the first housing 12 and the second housing 12 are assembled. Preferably, in this embodiment, both the first housing 12 and the second housing 12 have grooves 1414, which facilitates the adjustment of the distance between the first diaphragm assembly 31, the second diaphragm assembly 41 and the sound outlet 11, thereby facilitating the output of sound waves.

[0053] In this embodiment, by configuring the housing 10 as a first housing 12 and a second housing 12 joined together in the vibration direction, it simplifies the connection scheme between the magnetic circuit system 20, the first vibration system 30, the second vibration system 40 and the housing 10, thereby improving the processing efficiency of the acoustic device 100. Furthermore, by providing grooves 14 on the sides of the first housing 12 and / or the second housing 12 to form sound outlet holes 11, it facilitates the mold opening of the first housing 12 and / or the second housing 12, which in turn facilitates the processing of the first housing 12 and the second housing 12, further improving the processing efficiency of the acoustic device 100.

[0054] In one embodiment, the magnetic circuit system 20 includes a magnetic yoke 21, a central magnetic part 22, and a side magnetic part 23. The magnetic yoke 21 includes a U-shaped support part 211, a support part 212 extending from the two free ends of the support part 211 to both sides, and an annular magnetic plate 213 connected to both ends of the support part 212. The annular magnetic plate 213 is connected to the housing 10. The central magnetic part 22 is disposed inside the support part 211. The side magnetic part 23 is located outside the central magnetic part 22 and is spaced apart from the central magnetic part 22. A first magnetic gap is formed between the central magnetic part 22 and the side magnetic part 23, and a second magnetic gap is formed between the central magnetic part 22 and the support part 211.

[0055] Specifically, the annular magnetic plate 213 of the magnetic yoke 21 is connected to the side of the second housing 12 facing the first housing 12. Two support portions 212 are respectively disposed on two short shaft sections, with one end connected to the annular magnetic plate 213 and the other end connected to the U-shaped free end of the support portion 211 to support the support portion 211. The opening of the connected support portion 211 faces the second vibration system 40. The central magnetic portion 22 is connected to the U-shaped bottom surface inside the support portion 211 of the magnetic yoke 21, and a gap is formed between the central magnetic portion 22 and the two side walls of the support portion 211, forming a second magnetic gap. The side magnetic portion 23 is arranged around the outside of the support portion 211 and spaced apart from it, with the spaced interval forming a first magnetic gap. Thus, a first magnetic gap can be formed between the central magnetic part 22 and the side magnetic part 23, which is arranged in a ring around the support part 211. A second magnetic gap can be formed between the central magnetic part 22 and the support part 211, which is arranged in a ring around the central magnetic part 22. The first magnetic gap and the second magnetic gap are respectively located on both sides of the magnetic yoke, and the first magnetic gap is sleeved on the outside of the second magnetic gap and communicates with each other. In this way, the first voice coil 32 and the second voice coil 42 can vibrate independently without interfering with each other.

[0056] In this embodiment, by setting the magnetic circuit system 20 to the above structure, a magnetic field can be provided simultaneously for the first voice coil 32 of the first vibration system 30 and the second voice coil 42 of the second vibration system 40. The above structure is simple and compact, which can improve the space utilization within the housing 10, thereby reducing the stacking height of the acoustic device 100 in the vibration direction. In addition, the above structure can also increase the dynamic coefficient (BL) of the acoustic device 100, thereby improving the acoustic performance and sound quality of the acoustic device 100.

[0057] Furthermore, the magnetic yoke 21 is an integrally molded structure, and can be formed with the second housing 12 through the annular magnetic plate 213 to form an injection-molded integral structure.

[0058] In one embodiment, the central magnetic part 22 includes a central magnet 221 and a central magnetic guide plate 222 stacked on the central magnet 221, with the central magnetic guide plate 222 located on the side of the central magnet 221 away from the support part 211.

[0059] Specifically, the central magnet 221 and the central magnetic guide plate 222 are both strip-shaped with basically the same outer contour, and the width of the central magnet 221 and the central magnetic guide plate 222 on the short axis is the same as the width of the U-shaped bottom surface in the support part 211. The support part 211, the central magnet 221 and the central magnetic guide plate 222 are all connected by adhesive bonding.

[0060] There are multiple edge magnetic parts 23, each edge magnetic part 23 including an edge magnet 231 and an edge magnetic guiding plate 232 stacked on the edge magnet 231, the edge magnetic guiding plate 232 being connected to the housing 10. Both the edge magnet 231 and the edge magnetic guiding plate 232 are strip-shaped with basically the same outer contour. For example, the edge magnetic guiding plate 232 and the first housing 12 are formed as an injection-molded integral structure, and the edge magnet 231 is attached to the edge magnetic guiding plate 232.

[0061] In one embodiment, there are four side magnets 23, which are arranged around the central magnet 22, and at least one side magnet 231 is provided with a clearance hole, through which the sound transmission channel communicates with the external space.

[0062] Specifically, there are four side magnets 23, which are located at the two long axis ends and two short axis ends of the central magnet 22. The side magnets 231 corresponding to the long axis are provided with clearance holes, and the sound transmission channel is connected to the external space through the clearance holes.

[0063] It should be noted that when the housing 10 is arranged around the outside of the side magnet 23, and a sound outlet 11 is formed on the housing 10, a clearance hole is provided on the side magnet 231 corresponding to the sound outlet 11, and the sound transmission channel is connected to the sound outlet 11 through the clearance hole. When the housing 10 is arranged on one side of the housing 10, that is, when the side magnet 23 and the housing 10 together form the long axis side of the acoustic device 100, the clearance hole is the sound outlet 11.

[0064] In one embodiment, a side magnet 231 is provided only in one axial direction of the central magnet 22, and a sound outlet 11 is formed on the housing 10 in the other axial direction.

[0065] Specifically, there are two side magnets 23, which are respectively located on the two short axis sides of the central magnet 22. At this time, a sound outlet 11 is formed at the long axis end of the housing 10.

[0066] It should be noted that the side magnet 23 here eliminates the two side magnets 231 corresponding to the two long axis sides, but retains the two side magnetic plates 232 corresponding to the long axis sides, so as to improve the dynamic coefficient (BL) of the acoustic device 100, thereby improving the acoustic performance and sound quality of the acoustic device 100.

[0067] By providing a clearance hole on the side magnet 231, or by removing the side magnet 231 corresponding to the sound outlet 11 from the side magnet part 23, the airflow of the sound transmission channel is increased accordingly, thereby improving the sound quality of the acoustic device 100.

[0068] In one embodiment, the first vibration system 30 further includes two first centering supports 33, which are respectively disposed at the two short shaft ends of the housing 10. One end of each first centering support 33 is connected to the housing 10, and the other end is connected to the first voice coil 32 of the first vibration system 30; and / or,

[0069] The second vibration system 40 also includes a second centering support 43, which is connected between the housing 10 and the second voice coil 42.

[0070] Specifically, the first centering support 33 includes a first connecting portion 331 for connecting to the housing 10, a second connecting portion 332 for connecting to the first voice coil 32, and a spring arm 333 connecting the first connecting portion 331 and the second connecting portion 332. The first connecting portion 331 is strip-shaped and is clamped at the short shaft ends of the first housing 12 and the second housing 12. There are two second connecting portions 332, which are respectively disposed in the gap between the magnetic yoke 21 and the two long shafts of the housing 10. The spring arm 333 is Y-shaped, with one end connected to the first connecting portion 331 and the other end connected to the two second connecting portions 332 respectively. The two first centering supports 33 are respectively disposed at the short shaft ends of the housing 10 and connected to the four corners of the first voice coil 32 through the four second connecting portions 332. This can reduce the polarization of the first voice coil 32 in the non-vibration direction, thereby further improving the sound quality of the acoustic device 100.

[0071] In one embodiment, two first centering supports 33 are sandwiched between the first housing 12 and the second housing 12; the connecting ring 431 of the second centering support 43 is connected to the side of the second housing 12 away from the first housing 12.

[0072] Specifically, the second centering support plate 43 is plate-shaped and includes a connecting ring 431 for connecting to the housing 10, a vibrating ring 432 for connecting to the second voice coil 42, and multiple vibrating arms 433 connecting the connecting ring 431 and the vibrating ring 432. Both the connecting ring 431 and the vibrating ring 432 are rectangular. The connecting ring 431 is sandwiched between the second housing 12 and the second diaphragm assembly 41. The vibrating ring 432 is located within the connecting ring 431. There are four vibrating arms 433, one end of which is connected to a corner of the vibrating ring 432, and the other end extends counterclockwise to an adjacent corner and connects to the corresponding connecting ring 431. One side of the vibrating ring 432 is connected to the second diaphragm assembly 41, and the other side is connected to the second voice coil 42 of the second vibration system 40. This reduces the polarization of the second voice coil 42 in the non-vibration direction, thereby further improving the sound quality of the acoustic device 100.

[0073] In one embodiment, a terminal block 15 is provided at one short shaft end of the second housing 12; two first pads 334 and two second pads 335 are provided on the first centering support plate 33 corresponding to one end of the terminal block 15. Each first pad 334 is electrically connected to one second pad 335, the two first pads 334 are respectively electrically connected to the two leads of the first voice coil 32, and the two second pads 335 are respectively electrically connected to the terminal block 15. In this way, the first voice coil 32 can be connected to an external power source.

[0074] In one embodiment, the vibrating ring 432 has two third pads 434, and the connecting ring 431 has two third pads 435. Each third pad 434 is electrically connected to one third pad 435. The two third pads 434 are respectively electrically connected to the two leads of the second voice coil 42, and the two third pads 435 are respectively connected to the terminal block 15. In this way, the second voice coil 42 can be connected to an external power supply.

[0075] Based on the above settings, the wiring in the acoustic device 100 can be simplified, thereby reducing the interference of the wiring on the first vibration system 30 and the second vibration system 40.

[0076] In one embodiment, the first diaphragm assembly 31 includes a first diaphragm 311 and a first vibrating plate 312, and the second diaphragm assembly 41 includes a second diaphragm 411 and a second vibrating plate 412. Both the first diaphragm 311 and the second diaphragm 411 include an outer fixing part, a folded ring part, and an inner fixing part arranged sequentially from the outside to the inside. The outer fixing part of the first diaphragm 311 is connected to the first side of the housing 10, and the inner fixing part of the first diaphragm 311 is connected to the first vibrating plate 312. The outer fixing part of the second diaphragm 411 is connected to the second side of the housing 10, and the inner fixing part of the second diaphragm 411 is connected to the second vibrating plate 412.

[0077] In one embodiment, the folded portions of the first diaphragm 311 are all recessed toward the second diaphragm 411, and the folded portions of the second diaphragm 411 are recessed in the same direction as the folded portions of the first diaphragm 311.

[0078] In one embodiment, the device further includes a housing 210. The magnetic circuit system, the first vibration component 31, and the second vibration component 31 are all located within the housing 210. A first chamber is formed between the housing 210 and the first diaphragm component 31, and a second chamber is formed between the housing 210 and the second diaphragm component 31. The first chamber and the second chamber are separated or connected. This allows the airflows radiated outward by the first diaphragm component 31 and the second diaphragm component 41 to be separated or connected, which is beneficial for the structural design of the electronic device 200. For example, the sound waves radiated outward by the first diaphragm component 31 and the second diaphragm component 41 through the first and second chambers can be superimposed with the sound waves radiated through the sound transmission channel, thereby enhancing the sound. Alternatively, the sound waves radiated outward by the first diaphragm component 31 and the second diaphragm component 41 through the first and second chambers can cancel each other out with the sound waves radiated through the sound transmission channel, thus achieving a noise reduction effect.

[0079] The second aspect of this utility model also provides an electronic device 200, which includes the acoustic device 100 described in any of the above embodiments. The specific structure of the acoustic device 100 is as described in the above embodiments. Since the electronic device 200 in this embodiment includes the acoustic device 100 in the preceding embodiments, it at least has the beneficial effects of the above embodiments, which will not be elaborated further here.

[0080] Specifically, the outer casing 210 is also provided with a sound hole 220, and the sound hole 220 is connected to the sound outlet 11 of the acoustic device 100.

[0081] In this embodiment, the electronic device 200 can be a mobile phone, earphones, tablet, computer, wearable device, etc., which will not be listed here.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An acoustic device, characterized by The loudspeaker comprises a shell, a magnetic circuit system, a first vibration system and a second vibration system arranged in the shell, the first vibration system, the second vibration system, the magnetic circuit system and the shell jointly form an inner cavity; the magnetic circuit system forms a first magnetic gap and a second magnetic gap which are in communication with each other, the first vibration system comprises a first diaphragm assembly and a first voice coil connected with each other, the first voice coil is arranged in the first magnetic gap, the second vibration system comprises a second diaphragm assembly and a second voice coil connected with each other, and the second voice coil is arranged in the second magnetic gap. Wherein A sound transmission channel is formed between the first diaphragm assembly and the second diaphragm assembly; the sound transmission channel is in communication with the inner cavity and an external space.

2. The acoustic device of claim 1, wherein, The shell comprises two long axis sides and two short axis sides connected with the two long axis sides, the long axis side is provided with a sound outlet hole, and the sound transmission channel is in communication with the external space through the sound outlet hole.

3. The acoustic device of claim 2, wherein, The shell comprises a first shell and a second shell which are spliced along the vibration direction of the first diaphragm assembly and the second diaphragm assembly; the first shell and / or the second shell is provided with a groove corresponding to the opposite side of the long axis side, and the groove forms the sound outlet hole when the first shell and the second shell are spliced.

4. The acoustic device of claim 1, wherein, The magnetic circuit system comprises: A magnetic yoke comprising a U-shaped bearing part, support parts extending from both free ends of the bearing part to both sides thereof, and annular magnetic conductive plates connected to both ends of the support parts, the annular magnetic conductive plates are connected with the shell; A center magnetic part is arranged in the bearing part; An edge magnetic part is located outside the center magnetic part and is arranged in a spaced manner with the center magnetic part.

5. The acoustic device of claim 4, wherein, The center magnetic part comprises a center magnet and a center magnetic conductive plate stacked on the center magnet, the center magnetic conductive plate is located on the side of the center magnet away from the bearing part; the edge magnetic part comprises an edge magnet and an edge magnetic conductive plate stacked on the edge magnet, the edge magnetic conductive plate is connected with the shell; Wherein, the first magnetic gap is formed between the bearing part and the edge magnetic part, and the second magnetic gap is formed between the annular magnetic conductive plate and the center magnetic conductive plate.

6. The acoustic device of claim 5, wherein, The edge magnetic part is four, and is arranged in a ring around the center magnetic part, and at least one of the edge magnets is provided with a relief hole, and the sound transmission channel is in communication with the external space through the relief hole; or Only one axial direction of the center magnetic part is provided with an edge magnetic part, and the other axial direction is provided with a sound outlet hole formed on the shell.

7. The acoustic device of claim 3, wherein, The first vibration system further comprises two first centering branches, the two first centering branches are arranged at both short axis ends of the shell, one end of each first centering branch is connected with the shell, and the other end is connected with the first voice coil of the first vibration system; and / or The second vibration system further comprises a second centering branch, the second centering branch is connected between the shell and the second voice coil.

8. The acoustic device of claim 7, wherein, The two first centering branches are clamped between the first shell and the second shell; the connecting ring of the second centering branch is connected to the side of the second shell away from the first shell.

9. The acoustic device of claim 1, wherein, Also included is a housing, the magnetic circuit system, the first diaphragm assembly and the second diaphragm assembly are located in the housing, a first chamber is formed between the housing and the first diaphragm assembly, a second chamber is formed between the housing and the second diaphragm assembly, the first chamber is separated from the second chamber, or the first chamber is communicated with the second chamber.

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

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