Acoustic device and acoustic assembly

Abstract

The utility model belongs to the technical field of electroacoustic conversion, and particularly relates to an acoustic device and an acoustic assembly, the acoustic device comprises a vibration system and a magnetic circuit system, the vibration system comprises a diaphragm and a voice coil, the diaphragm comprises a first end portion and a second end portion, the width of the first end portion is smaller than that of the second end portion, the voice coil is connected with the diaphragm, and the magnetic circuit system is connected with the voice coil. The width of the voice coil corresponding to the first end part is smaller than that of the voice coil corresponding to the second end part; the magnetic circuit system forms a magnetic gap which is approximately the same as the outer contour of the voice coil in shape, and one end, far away from the diaphragm, of the voice coil is inserted into the magnetic gap; the vibrating diaphragm further comprises an annular folding ring part which is roughly the same as the outer contour of the vibrating diaphragm in shape, the rigidity of the periphery of the folding ring part is roughly the same, and the total magnetic flux, corresponding to the first end part, of the magnetic gap is roughly the same as the total magnetic flux, corresponding to the second end part, of the magnetic gap. By means of the structure, the acoustic device can utilize the irregular containing space of the acoustic assembly to the maximum degree, and the performance of the acoustic device is optimized.

Description

Technical Field

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

[0002] With the increasing evolution of electronic devices such as smartphones, tablets, laptops, and smart wearables, the space used to house speakers is also becoming increasingly diverse. Because most existing speakers have relatively regular shapes, they fail to maximize the use of the space within electronic devices, resulting in significant performance losses. Therefore, designing speakers that maximize the use of the irregular spaces within electronic devices and improve their performance is a pressing technical challenge.

[0003] Therefore, in view of the above shortcomings, this utility model is proposed. Utility Model Content

[0004] The purpose of this invention is to provide an acoustic device and acoustic components to at least partially solve the above-mentioned technical problems.

[0005] The first aspect of this utility model provides an acoustic device, comprising:

[0006] A vibration system comprising a diaphragm and a voice coil, the diaphragm comprising a first end and a second end, the width of the first end being smaller than the width of the second end, and the voice coil being connected to the diaphragm, the width of the voice coil corresponding to the first end being smaller than the width of the voice coil corresponding to the second end;

[0007] A magnetic circuit system having a magnetic gap whose shape is approximately the same as the outer contour of the voice coil, with the end of the voice coil away from the diaphragm inserted into the magnetic gap;

[0008] The diaphragm also includes an annular folded portion with a shape approximately the same as its outer contour. The stiffness of the circumference of the folded portion is approximately the same. The total magnetic flux of the magnetic gap corresponding to the first end is approximately the same as the total magnetic flux of the magnetic gap corresponding to the second end.

[0009] The acoustic device provided by this utility model may also have the following additional technical features:

[0010] In one specific embodiment of this utility model, the diaphragm is symmetrically arranged about a straight line extending from its center toward the midpoint of the first end; and / or

[0011] At least one of the width or height of the folded ring portion is continuously increased from the first end to the second end; and / or

[0012] The voice coil is roughly trapezoidal.

[0013] In one specific embodiment of this utility model, the magnetic circuit system includes a magnetic yoke and a central magnetic part and a side magnetic part disposed on the side of the magnetic yoke facing the vibration system. The outer contour of the central magnetic part is approximately the same as the outer contour of the voice coil. The side magnetic parts are spaced apart outside the central magnetic part and form the magnetic gap with the central magnetic part.

[0014] In one specific embodiment of this utility model, the side magnetic part includes side magnets and side magnetic plates stacked sequentially on the magnetic yoke. The side magnets include a short side magnet corresponding to the first end, a long side magnet corresponding to the second end, and an intermediate magnet disposed between the short side magnet and the long side magnet and distributed on both sides of the central magnetic part. The unit magnetic flux of the short side magnet is greater than the unit magnetic flux corresponding to the long side magnet.

[0015] In one specific embodiment of this utility model, the unit magnetic flux of the intermediate magnet is between the unit magnetic flux of the short-side magnet and the unit magnetic flux of the long-side magnet;

[0016] And / or, the central magnetic part includes a central magnet and a central magnetic plate stacked sequentially on the magnetic yoke, wherein the unit magnetic flux of the central magnet is the same as the unit magnetic flux of the intermediate magnet.

[0017] In one specific embodiment of this utility model, the acoustic device further includes a housing, the side magnetic plate is connected to the housing, the short side magnet has a first gap with the housing, the long side magnet has a second gap with the housing, and the side magnetic plate has a vent hole in the area corresponding to the first gap and / or the second gap.

[0018] In one specific embodiment of this utility model, the central magnetic part includes a central magnet and a central magnetic plate stacked together, and an adjustment hole penetrating the central magnet is provided in the region near the second end of the central magnet.

[0019] In one specific embodiment of this utility model, the acoustic device further includes a housing, and along the vibration direction of the vibration system, the housing has a first opening and a second opening, the diaphragm is connected to the first opening, and the magnetic circuit system is connected to the second opening; wherein...

[0020] The housing, the vibration system, and the magnetic circuit system enclose a cavity, and the housing has a leakage hole communicating with the cavity; and / or, the vibration system further includes a vibrating plate whose outer contour is approximately the same as the outer contour of the diaphragm, and the diaphragm further includes an outer fixing part disposed on the outer periphery of the folded ring and an inner fixing part disposed on the inner periphery of the folded ring, the outer fixing part being connected to the housing, and the inner fixing part being connected to the vibrating plate.

[0021] A second aspect of this invention also provides an acoustic component, comprising a housing and the acoustic device described in any one of the preceding embodiments, wherein...

[0022] The housing includes a first segment, a second segment, and a connecting segment located between the two. The connecting segment has a third end near the first segment and a fourth end near the second segment, and the width of the third end is smaller than the width of the fourth end. The acoustic device is housed in the housing, with the first end opposite to the third end and the second end opposite to the fourth end.

[0023] In one specific embodiment of this utility model, the connecting segment has an inclined side that narrows from the second segment to the first segment, and the acoustic device has a side that is in the same direction of inclination as the inclined side.

[0024] In one specific embodiment of this utility model, the acoustic component is an eyeglass temple, wherein the first section is used to contact the user's ear, and the connecting section is provided with a sound outlet on the side near the ear, through which the sound waves of the diaphragm radiate to the outside.

[0025] The acoustic device provided by this invention is formed into an irregular structure with a first end width smaller than the second end width through a vibration system and a magnetic circuit system. This maximizes the utilization of the irregular space for the acoustic components, thereby optimizing its performance. Simultaneously, by ensuring that the total magnetic flux corresponding to the first end and the second end are approximately the same, the driving force generated by the magnetic circuit system at the first and second ends is identical. Furthermore, the stiffness of the folded ring around the outer periphery of the diaphragm is designed to be approximately the same to balance the vibration resistance to the diaphragm. This reduces diaphragm polarization, improves diaphragm vibration stability, and ensures the performance of the acoustic device. Attached Figure Description

[0026] 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.

[0027] Figure 1 This is a three-dimensional structural diagram of the acoustic device in an embodiment of the present invention;

[0028] Figure 2 for Figure 1 Exploded view of the acoustic device in the middle;

[0029] Figures 3-4 These are schematic cross-sectional views of the acoustic device along different planes in the embodiments of this utility model.

[0030] Figure 5 This is a cross-sectional structural diagram of the temple of the glasses in an embodiment of this utility model.

[0031] Explanation of reference numerals in the attached figures:

[0032] 100 - Acoustic device;

[0033] 10-Shell, 11-Leakage hole;

[0034] 20-Magnetic circuit system; 21-Magnetic yoke; 22-Central magnetic part; 221-Central magnet; 222-Central magnetic plate; 223-Adjustment hole; 23-Side magnetic part; 231-Side magnet; 232-Annular magnetic plate; 233-Ventilation hole;

[0035] 30-Vibration system, 31-Diaphragm, 311-Bell ring, 312-Inner fixing part, 313-Outer fixing part, 314-First end, 315-Second end, 32-Voice coil, 33-Centering support, 34-Steel ring, 35-Vibrating plate;

[0036] 200 - Acoustic components;

[0037] 201 - First section, 202 - Connecting section, 203 - Second section, 204 - Sound outlet. Detailed Implementation

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] This utility model embodiment provides an acoustic device 100, which is used for an acoustic component and serves as the sound-generating structure of the acoustic component. The acoustic component can be a device with sound-generating function, such as VR glasses, AR glasses, mobile phones, headphones, or sound-generating modules. Furthermore, the acoustic device 100 provided in this embodiment can maximize its performance in the face of irregular accommodation space caused by the ever-changing acoustic component.

[0043] Reference Figures 1-4 The acoustic device 100 provided in this embodiment of the present invention includes a vibration system 30 and a magnetic circuit system 20. The vibration system 30 includes a diaphragm 31 and a voice coil 32. The diaphragm 31 includes a first end 314 and a second end 315. The width of the first end 314 is smaller than the width of the second end 315. The voice coil 32 is connected to the diaphragm 31, and the width of the voice coil 32 corresponding to the first end 314 is smaller than the width of the voice coil 32 corresponding to the second end 315. The magnetic circuit system 20 forms a magnetic gap with a shape approximately the same as the outer contour of the voice coil 32. One end of the voice coil 32 away from the diaphragm 31 is inserted into the magnetic gap. The diaphragm 31 also includes an annular folded portion 311 with a shape approximately the same as its outer contour. The stiffness of the circumference of the folded portion 311 is approximately the same. The total magnetic flux of the magnetic gap corresponding to the first end 314 and the total magnetic flux of the magnetic gap corresponding to the second end 315 are approximately the same.

[0044] Specifically, the magnetic circuit system 20 is used to form a magnetic gap with a magnetic field, and the vibration system 30 includes a diaphragm 31 and a voice coil 32. The voice coil 32 is ring-shaped, with one end inserted into the magnetic gap and the other end connected to the diaphragm 31. Thus, when the voice coil 32 is energized, it can be subjected to force and vibrate up and down in the magnetic gap, thereby driving the diaphragm 31 to vibrate and produce sound.

[0045] In the vibration system 30, along the length of the plane containing the diaphragm 31, it has a first end 314 and a second end 315, wherein the width of the first end 314 is smaller than the width of the second end 315, meaning the diaphragm 31 is formed as an irregular structure with different contours at both ends. Correspondingly, the width of the voice coil 32 corresponding to the first end 314 is smaller than the width of the voice coil 32 corresponding to the second end 315. The contour of the magnetic gap in the magnetic circuit system 20 is approximately the same as that of the voice coil 32, thus the magnetic circuit system 20 can be formed as an irregular structure with similar contours, meaning the magnetic circuit system 20 also has a first end and a second end that correspond one-to-one with the vibration system 30, and the width of the magnetic circuit system 20 corresponding to the first end 314 is smaller than the width corresponding to the second end 315, thus the acoustic device 100 as a whole can be formed as an irregular structure. Due to the diverse shapes of acoustic components, there is a variety of spaces available to accommodate the acoustic devices. Compared to the rectangular structures in related technologies, the acoustic device 100 in this embodiment, being formed into an irregular shape, can maximize the use of the irregular space for accommodating the acoustic components, thereby optimizing its performance.

[0046] Furthermore, the magnetic circuit system 20 forms a magnetic gap with a shape approximately the same as the outer contour of the voice coil 32. That is, the width of the magnetic circuit system 20 corresponding to the first end 314 is smaller than the width of the magnetic circuit system 20 corresponding to the second end 315, and the length of the magnetic gap corresponding to the first end 314 is smaller than the length of the magnetic gap corresponding to the second end 315. By adjusting the total magnetic flux of the magnetic gap corresponding to the first end 314 to be approximately the same as the total magnetic flux of the magnetic gap corresponding to the second end 315, the driving force on both ends of the voice coil 32 is made approximately the same. At this time, the driving force on the first end 314 and the second end 315 of the diaphragm 31 can be made approximately the same, thereby reducing the polarization of the diaphragm 31 and ensuring the performance of the acoustic device 100.

[0047] Correspondingly, in the vibration system 30, the diaphragm 31 reciprocates under the drive of the voice coil 32 to produce sound. To enable the diaphragm 31 to vibrate, an annular folded portion 311 is provided on the outer periphery of the diaphragm 31. The folded portion 311 has deformation capability, thus enabling the diaphragm 31 to vibrate under the drive of the voice coil 32. Since the diaphragm 31 is an irregular structure with different contours at both ends, the folded portion 311 is also an irregular structure with different lengths at both ends. By adjusting the stiffness of the circumference of the folded portion 311 to be the same, and also making the stiffness of the folded portion 311 corresponding to the first end 314 and the stiffness of the folded portion 311 corresponding to the second end 315 the same, the resistance of the folded portion 311 to the vibration system 30 is made the same, so that the vibration of the two ends of the diaphragm 31 is balanced. This reduces the polarization caused by the irregular shape of the diaphragm 31, thereby ensuring the performance of the acoustic device 100.

[0048] The acoustic device 100 provided in this embodiment of the invention is formed into an irregular structure by means of a vibration system 30 and a magnetic circuit system 20, with the width corresponding to the first end 314 being smaller than the width corresponding to the second end 315. This maximizes the utilization of the irregular space for the acoustic components, thereby optimizing its performance. Simultaneously, by making the total magnetic flux of the magnetic gap corresponding to the first end 314 approximately the same as the total magnetic flux corresponding to the second end 315, the driving force generated by the magnetic circuit system 20 corresponding to the first end 314 is the same as the driving force generated by the second end 315. Furthermore, the stiffness of the folded ring portion 311 around the outer periphery of the diaphragm 31 is designed to be approximately the same to balance the resistance to the diaphragm 31. This reduces the polarization of the diaphragm 31, improves the vibration stability of the diaphragm 31, and ensures the performance of the acoustic device 100.

[0049] It should be noted that "same" in this embodiment does not mean absolute sameness. Differences caused by limitations in processes and technologies are also within the scope of "same" in this embodiment.

[0050] In one embodiment, the diaphragm 31 is arranged symmetrically about a straight line extending from its center toward the midpoint of the first end 314.

[0051] Specifically, the projection of the first end 314 onto a plane perpendicular to the vibration direction can be a straight line segment or an arc segment. Similarly, the projection of the second end 315 onto a plane perpendicular to the vibration direction can be a straight line segment or an arc segment, wherein the length of the straight line segment is the width of the corresponding end, and the chord length of the arc segment is the width of the corresponding end. In this embodiment, the diaphragm 31 can be teardrop-shaped, bullet-shaped, trapezoidal, or other irregular shapes.

[0052] In one embodiment, at least one of the width or height of the folded ring portion 311 is continuously increased from the first end portion 314 to the second end portion 315. This allows the influence of the irregular shape on its stiffness to be balanced by utilizing the height and / or width of the folded ring portion 311, thereby making the stiffness of the folded ring portion 311 corresponding to the first end portion 314 approximately the same as the stiffness of the folded ring portion 311 corresponding to the second end portion 315, and also making the stiffness of the circumference of the folded ring portion 311 approximately the same.

[0053] Specifically, the stiffness of the folded ring portion 311 is affected by both its structure and material. When the material of the folded ring portion 311 is the same, its width or height affects its stiffness; the smaller the width and height, the smaller its deformation capacity, i.e., the higher its stiffness. Therefore, when at least one of the width or height of the folded ring portion 311 is continuously increased from the first end 314 to the second end 315, the stiffness of the first end 314 of the folded ring portion 311 can be increased while the stiffness of the second end 315 can be decreased. This ensures that the stiffness around the circumference of the folded ring portion 311 is approximately the same, avoiding the polarization risk caused by the irregular structure of the vibration system 30. In this embodiment, it is preferable to adjust the width of the folded ring portion 311 so that, with a fixed height of the acoustic device 100, the amplitude of the folded ring portion 311 is not affected.

[0054] Of course, in other embodiments, the stiffness of the folded ring portion 311 can also be adjusted by adjusting the thickness of the folded ring portion 311. Specifically, the greater its thickness, the smaller the deformation capacity of the folded ring portion 311, that is, the higher its stiffness. This can make the thickness of the folded ring portion 311 corresponding to the first end 314 increase, that is, greater than the thickness of the folded ring portion 311 corresponding to the second end 315, to achieve the desired effect.

[0055] In one embodiment, the voice coil 32 is generally trapezoidal. Specifically, the shape of the voice coil 32 may be approximately the same as or different from the outer contour of the diaphragm 31. Preferably, the voice coil 32 is generally trapezoidal to facilitate the arrangement of the magnetic circuit system 20.

[0056] In one embodiment, the magnetic circuit system 20 includes a magnetic yoke 21 and a central magnetic part 22 and a side magnetic part 23 disposed on the side of the magnetic yoke 21 facing the vibration system 30. The outer contour of the central magnetic part 22 is approximately the same as the outer contour of the voice coil 32. The side magnetic parts 23 are disposed at intervals on the outside of the central magnetic part 22 and form a magnetic gap with the central magnetic part 22.

[0057] Specifically, the magnetic yoke 21 has a flat plate structure, and its outer contour is roughly the same as the outer contour of the voice coil 32 or the diaphragm 31. The central magnetic part 22 and the side magnetic part 23 are bonded to the side of the magnetic yoke 21 facing the vibration system 30, so as to form a magnetic gap.

[0058] In one embodiment, the side magnetic part 23 includes a side magnet 231 and a side magnetic plate stacked sequentially on the magnetic yoke 21. The side magnet 231 includes a short side magnet corresponding to the first end 314, a long side magnet corresponding to the second end 315, and an intermediate magnet disposed between the short side magnet and the long side magnet and distributed on both sides of the central magnetic part 22. The unit magnetic flux of the short side magnet is greater than the unit magnetic flux corresponding to the long side magnet.

[0059] Specifically, the side magnets 231 are all strip-shaped, and their length is approximately less than the length of the corresponding side of the side magnet part 23. The corresponding side magnets 231 and the side magnetic plates are bonded together.

[0060] The unit magnetic flux can be adjusted by changing the grade of the side magnets 231. For example, when there are four side magnets 231, the short side magnet 231 corresponding to the first end 314 can be set to a high-grade magnet to provide a larger unit magnetic flux, while the long side magnet 231 corresponding to the second end 315 can be set to a low-grade magnet to provide a smaller unit magnetic flux. The two are balanced so that although the two side magnets 231 have different volumes, they provide the same driving force. The high grade and low grade correspond to the magnetization per unit area of ​​the magnet.

[0061] For example, the volume of the short-side magnet is V1, and the unit magnetic flux is Φ1; the volume of the long-side magnet is V2, and the unit magnetic flux is Φ2; V1 / V2 = Φ2 / Φ1. This ensures that the driving force on the voice coil 32 corresponding to the first end 314 is equal to the driving force on the voice coil 32 corresponding to the second end 315. Understandably, in this example, the thicknesses of the short-side and long-side magnets are the same.

[0062] In one embodiment, the central magnetic part 22 includes a central magnet 221 and a central magnetic guide plate 222 stacked together. An adjustment hole 223 is provided in the region of the central magnet 221 near the second end 315. The adjustment hole 223 is used to reduce the size of the central magnet 221 corresponding to the second end 315, reduce the total magnetic flux of the central magnet 221 corresponding to the second end 315, and balance the total magnetic flux in the regions at both ends of the central magnetic part 22.

[0063] Specifically, the outer contours of the central magnet 221 and the central magnetic guide plate 222 are roughly the same as the outer contour of the voice coil 32, meaning that the central magnet 221 and the central magnetic guide plate 222 are irregularly shaped structures. By opening an adjustment hole 223 on the central magnet 221, the total magnetic flux at both ends of the central magnet 221 can be balanced, and magnetic leakage of the central magnet 221 can be reduced, thereby improving the utilization rate of the central magnet 221.

[0064] In one embodiment, the unit magnetic flux of the intermediate magnet is between the unit magnetic flux of the short-side magnet and the unit magnetic flux of the long-side magnet, in order to balance the power provided around the magnetic circuit system 20.

[0065] In one embodiment, the unit magnetic flux of the central magnet 221 is the same as that of the intermediate magnet. That is, the central magnet 221 and the intermediate magnet use the same brand of magnet, and the uniformity of specifications and models facilitates manufacturing and saves production costs. Understandably, in this embodiment, the thickness of the central magnet 221 and the intermediate magnet is the same. Furthermore, the thickness of each magnet in the magnetic circuit system 20 is the same, which facilitates the regular arrangement of the magnetic circuit system 20 and ensures the vibration space of the diaphragm 31 is balanced.

[0066] In one embodiment, the acoustic device 100 further includes a housing 10, a side magnetic plate connected to the housing 10, a first gap between the short side magnet and the housing, a second gap between the long side magnet and the housing 10, and a vent hole provided on the side magnetic plate in the area corresponding to the first gap and / or the second gap.

[0067] Specifically, the housing 10 is formed as a hollow frame structure, and along the axial direction of the housing 10, it has a first side and a second side opposite to each other. A first opening is opened on the first side and a second opening is opened on the second side. The diaphragm 31 is connected to the first side, and the magnetic yoke 21 of the magnetic circuit system 20 is connected to the second side, so that the vibration system 30 and the magnetic circuit system 20 are arranged opposite to each other.

[0068] The side magnetic plate is connected to the housing 10. By providing vent holes 233 in the area of ​​the side magnetic plate corresponding to the first gap or the second gap, the airflow efficiency at the corresponding position can be improved, thereby balancing the air pressure and reducing the polarization of the diaphragm 31, making the vibration of different areas of the diaphragm 31 more balanced. Alternatively, the side magnetic plate may be provided with vent holes 233 in both the area corresponding to the first gap and the second gap.

[0069] Specifically, the number and size of the vents 233 can be adjusted as needed, and no limitation is made here.

[0070] Optionally, the four side magnetic plates are connected end to end to form an annular magnetic plate 232, and the outer periphery of the annular magnetic plate 232 is connected to the housing 10. This facilitates the processing of the side magnetic plates, thereby helping to reduce the cost of the acoustic device 100 and improve the processing efficiency of the acoustic device 100.

[0071] In one embodiment, the acoustic device 100 further includes a housing 10, which, together with the vibration system 30 and the magnetic circuit system 20, forms a cavity. The housing 10 has a leakage hole 11 communicating with the cavity. The leakage hole 11 can also adjust the air pressure inside the cavity, thereby making the vibration of different regions of the diaphragm 31 more balanced.

[0072] Specifically, the housing 10 is formed as a hollow frame structure, and along the axial direction of the housing 10, it has a first side and a second side opposite to each other. A first opening is opened on the first side and a second opening is opened on the second side. The diaphragm 31 is connected to the first side, and the magnetic yoke 21 of the magnetic circuit system 20 is connected to the second side, so that the vibration system 30 and the magnetic circuit system 20 are arranged opposite to each other.

[0073] In one embodiment, the vibration system 30 further includes a vibrating plate 35 whose outer contour is approximately the same as that of the diaphragm 31. The diaphragm 31 also includes an outer fixing part 313 disposed on the outer periphery of the folded ring part 311 and an inner fixing part 312 disposed on the inner periphery of the folded ring part 311. The outer fixing part 313 is connected to the housing 10, and the inner fixing part 312 is connected to the vibrating plate 35.

[0074] Specifically, the outer fixing part 313 is bonded to the first side of the housing 10 by adhesive bonding. To improve the connection strength, a steel ring 34 with an outer contour approximately the same as the diaphragm 31 is provided on the outer side of the outer fixing part 313. That is, the outer fixing part 313 is clamped between the steel ring 34 and the first side of the housing 10. The inner fixing part 312 is bonded to the vibrating plate 35.

[0075] In one embodiment, the vibration system 30 further includes a centering support 33, one end of which is connected to the housing 10, and the other end is connected to the voice coil 32. The centering support 33 is adapted to reduce the polarization of the voice coil 32 and improve the vibration stability of the vibration system 30. Furthermore, the centering support 33 is provided with spot welding pads, through which the leads of the voice coil 32 are connected to an external power supply. In this embodiment, there are two centering supports 33, spaced apart at the second end 315. Each centering support 33 is provided with spot welding pads, which are respectively connected to the input and output leads of the voice coil 32.

[0076] A second aspect of this invention also provides an acoustic component 200, which includes a housing and an acoustic device 100 as described above. The acoustic component 200 can be a device with sound-generating functionality, such as VR glasses, AR glasses, a mobile phone, headphones, or a sound-generating module.

[0077] In one embodiment, the housing of the acoustic component 200 includes a first segment 201, a second segment 203, and a connecting segment 202 located between the two. The connecting segment has a third end near the first segment 201 and a fourth end near the second segment 203, with the width of the third end being smaller than the width of the fourth end. The acoustic device 100 is housed within the housing, with the first end 314 opposite to the third end and the second end 315 opposite to the fourth end. Thus, when the acoustic component 200 has an irregular shape, the shape of the acoustic device 100 is more compatible with it, which helps to maximize the use of the reserved space of the acoustic component 200, maximize its own size, and optimize its own performance and the performance of the acoustic component 200.

[0078] In one embodiment, the connecting segment 202 has an inclined side that narrows from the second segment 203 towards the first segment 201, and the acoustic device 100 has a side portion with the same inclination direction as the inclined side. The shape of the acoustic component 200 is designed according to the requirements of its application scenario. The shape of the acoustic device 100 is adapted to the acoustic component 200, which helps to maximize the use of the reserved space of the acoustic component 200, maximize its own size, and optimize its own performance and the performance of the acoustic component 200. It can be understood that the shape of the acoustic device 100 has a corresponding side portion, which may be the housing of the acoustic device 100, and the shape of its vibration system 30 and magnetic circuit system 20 is adapted accordingly. At the same time, the inclined side portion can be an inclined straight edge, an inclined arc edge, or a combination of an inclined straight edge and an inclined arc edge, etc., and is not limited here.

[0079] like Figure 5 As shown, when the acoustic component 200 is a temple of glasses, the first section 201 is used to contact the user's ear, and the connecting section 202 has a sound outlet 204 on the side near the ear, through which the sound waves of the diaphragm 31 radiate to the outside. The temple of glasses can be the temple of VR glasses or AR glasses, and the acoustic device 100 is disposed in the temple.

[0080] Since the acoustic component 200 in this embodiment includes the acoustic device 100 in all the above embodiments, it also has at least the beneficial effects of the above embodiments, which will not be described in detail here.

[0081] 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 acoustic device comprises: a vibration system comprising a diaphragm and a voice coil, the diaphragm comprising a first end and a second end, the width of the first end being smaller than the width of the second end, the voice coil being connected to the diaphragm, the width of the voice coil corresponding to the first end being smaller than the width of the voice coil corresponding to the second end; a magnetic circuit system, the magnetic circuit system forming a magnetic gap having a shape substantially the same as the outer contour of the voice coil, the end of the voice coil away from the diaphragm being inserted into the magnetic gap; wherein the diaphragm further comprises a ring-shaped folded ring portion having a shape substantially the same as the outer contour of the diaphragm, the stiffness of the folded ring portion being substantially the same around the circumference, the total magnetic flux of the magnetic gap corresponding to the first end being substantially the same as the total magnetic flux of the magnetic gap corresponding to the second end.

2. The acoustic device of claim 1, wherein, the diaphragm is symmetrically arranged about a straight line passing through the center of the diaphragm and extending to the midpoint of the first end; and / or, at least one of the width or the height of the folded ring portion is continuously and incrementally arranged from the first end to the second end; and / or, the voice coil is substantially trapezoidal.

3. The acoustic device of claim 1, wherein, the magnetic circuit system comprises a magnetic yoke, a center magnetic portion and a side magnetic portion provided on the side of the magnetic yoke facing the vibration system, the outer contour of the center magnetic portion being substantially the same as the outer contour of the voice coil, the side magnetic portion being spaced apart from the outside of the center magnetic portion and forming the magnetic gap with the center magnetic portion.

4. The acoustic device of claim 3, wherein, the side magnetic portion comprises a side magnetic body and a side magnetic conducting plate sequentially and layerwisely arranged on the magnetic yoke, the side magnetic body comprising a short side magnetic body corresponding to the first end, a long side magnetic body corresponding to the second end, and an intermediate magnetic body provided between the short side magnetic body and the long side magnetic body and distributed on both sides of the center magnetic portion, the unit magnetic flux of the short side magnetic body being greater than the unit magnetic flux corresponding to the long side magnetic body.

5. The acoustic device of claim 4, wherein, the unit magnetic flux of the intermediate magnetic body is between the unit magnetic flux of the short side magnetic body and the unit magnetic flux of the long side magnetic body; and / or, the center magnetic portion comprises a center magnetic body and a center magnetic conducting plate sequentially and layerwisely arranged on the magnetic yoke, the unit magnetic flux of the center magnetic body being the same as the unit magnetic flux of the intermediate magnetic body.

6. The acoustic device of claim 4, wherein, the acoustic device further comprises a shell, the side magnetic conducting plate is connected to the shell, there is a first gap between the short side magnetic body and the shell, there is a second gap between the long side magnetic body and the shell, the side magnetic conducting plate is provided with air holes in the area corresponding to the first gap and / or the second gap.

7. The acoustic device of claim 3, wherein, the center magnetic portion comprises a center magnetic body and a center magnetic conducting plate layerwisely arranged, the center magnetic body is provided with an adjusting hole penetrating the center magnetic body in the area close to the second end.

8. The acoustic device according to any one of claims 1 to 7, characterized in that the acoustic device further comprises a shell, along the vibration direction of the vibration system, the shell has a first opening and a second opening, the diaphragm is connected to the first opening, and the magnetic circuit system is connected to the second opening. The shell and the vibration system and the magnetic circuit system enclose a cavity, and the shell is provided with a leakage hole in communication with the cavity; and / or the vibration system further comprises a vibration plate having an outer contour substantially the same as that of the diaphragm, the diaphragm further comprises an outer fixing portion arranged at the outer periphery of the folded ring portion and an inner fixing portion arranged at the inner periphery of the folded ring portion, the outer fixing portion is connected with the shell, and the inner fixing portion is connected with the vibration plate.

9. An acoustic assembly, characterized by An acoustic device as claimed in any one of claims 1 to 8, comprising a housing. The connecting section has an inclined edge portion narrowing from the second section to the first section, and the acoustic device has a side edge portion consistent with the inclined direction of the inclined edge portion.

10. The acoustic assembly of claim 9, wherein, The acoustic assembly is a glasses leg, wherein 11. The acoustic assembly of claim 9 or 10, wherein, The first section is configured to contact the ear of a user, the connecting section is provided with a sound outlet hole on the side close to the ear, and the sound wave of the diaphragm is radiated to the outside through the sound outlet hole. ​

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