Acoustic device and acoustic assembly
By using the speaker's irregular shape design and adjusting the diaphragm stiffness, the problem of performance loss in irregular spaces was solved, and efficient sound production in irregular spaces was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-07
- Publication Date
- 2026-03-13
AI Technical Summary
Existing loudspeaker design rules fail to maximize the use of space for acoustic components, resulting in performance loss.
The speaker's vibration and magnetic circuit systems are designed with irregular shapes. The width of the first end of the diaphragm is smaller than that of the second end. The magnetic gap and the stiffness of the surround are set differently to adjust the vibration characteristics of the diaphragm and reduce polarization.
Maximize the use of irregular acoustic component space, optimize speaker performance, reduce diaphragm polarization, and ensure stable sound production of the acoustic device.
Smart Images
Figure CN223993733U_ABST
Abstract
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 diversity of acoustic components in mobile phones, tablets, laptops, and smart wearable devices, the space available for speakers—the devices that house these components—is also changing. Because most existing speakers have relatively regular shapes, they fail to maximize the use of the space within the acoustic components, resulting in significant performance losses. Therefore, designing speakers that maximize the use of irregular spaces within the acoustic components 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 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 further includes an annular folded portion with a shape approximately the same as its outer contour, and the stiffness of the first end of the folded portion is less than the stiffness of the second end, and the magnetic flux of the magnetic gap corresponding to the first end is less than the 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, height, or thickness of the folded ring portion is continuously decreased 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 central magnetic part includes a central magnet and a central magnetic plate stacked sequentially on the magnetic yoke, and the side magnetic part includes a side magnet and a side magnetic plate stacked sequentially on the magnetic yoke, wherein the unit magnetic flux of the central magnet and the plurality of side magnets is the same.
[0015] In one specific embodiment of this utility model, the side magnets include three, and the three side magnets are respectively disposed corresponding to the second end and two sides adjacent to the second end; or
[0016] The side magnets include four, which are arranged in a ring around the central magnet.
[0017] In one specific embodiment of this utility model, the lead wire of the voice coil is led out from either the first end or the second end, and the side magnet portion has a clearance space for the lead wire of the voice coil to be led out.
[0018] In one specific embodiment of this utility model, the acoustic device further includes a housing, the side magnetic plate is connected to the housing, at least a portion of the side magnets have a gap with the housing, and the side magnetic plate has a vent hole in the area corresponding to the gap.
[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 making the stiffness of the first end of the folded ring less than the stiffness of the second end, and the magnetic flux corresponding to the magnetic gap at the first end less than the magnetic flux corresponding to the magnetic gap at the second end, the vibration system can be tuned using the stiffness of the first and second ends of the diaphragm. This allows the first and second ends of the diaphragm to vibrate with the same amplitude even under different driving forces, effectively reducing diaphragm polarization and ensuring 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, for example, VR glasses, AR glasses, mobile phones, headphones, or other devices with sound-generating functions. 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 1-4The 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 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 first end 314 of the folded portion 311 is smaller than the stiffness of the second end 315. The magnetic flux of the magnetic gap corresponding to the first end 314 is smaller than the magnetic flux of the magnetic gap corresponding to the second end 315.
[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 outer 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 first end of the magnetic circuit system 20 is smaller than the width of the second end, thus the acoustic device 100 as a whole can be formed as an irregular structure. Due to the diverse shapes of acoustic components, resulting in diverse spaces for accommodating the acoustic device, compared to the rectangular structure in related technologies, the acoustic device 100 in this embodiment, being formed as an irregular structure, can maximize the use of the irregular accommodating space of the acoustic components, thereby optimizing its performance.
[0046] Since the length of the voice coil 32 corresponding to the first end 314 is less than the length of the voice coil 32 corresponding to the second end 315, the corresponding length in the magnetic circuit system 20 is also less than the corresponding length to the second end 315. Consequently, the magnetic flux of the magnetic gap corresponding to the first end 314 is less than the magnetic flux of the magnetic gap corresponding to the second end 315. Therefore, the driving force on the voice coil 32 corresponding to the first end 314 is less than the driving force on the voice coil 32 corresponding to the second end 315, that is, the driving force on the diaphragm 31 corresponding to the first end 314 is less than the driving force on the diaphragm 31 corresponding to the second end 315. Here, the "magnetic flux" of the magnetic gap corresponding to the first end 314 and the second end 315 refers to the total magnetic flux passing through the magnetic gap.
[0047] In the vibration system 30, the diaphragm 31 vibrates back and forth under the drive of the voice coil 32 to produce sound. In order 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 the ability to deform, so that the diaphragm 31 can vibrate under the drive of the voice coil 32. Since the diaphragm 31 is an irregularly shaped structure with different contours at both ends, the folded ring 311 also has different stiffness due to the different lengths at both ends. By adjusting the stiffness at both ends of the folded ring 311, and specifically making the stiffness of the first end 314 of the folded ring 311 less than the stiffness of the second end 315, that is, the deformation capacity of the first end 314 of the folded ring 311 is greater than the deformation capacity of the second end 315, when the driving force on the first end 314 of the diaphragm 31 is less than the driving force on the second end 315 of the diaphragm 31, the amplitudes of the first end 314 and the second end 315 of the diaphragm 31 can be approximately the same. This can reduce 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 with the width of the first end 314 being smaller than the width of the second end 315 through the vibration system 30 and the magnetic circuit system 20. This maximizes the utilization of the irregular accommodation space of the acoustic components, thereby optimizing its performance. At the same time, by making the stiffness of the first end 314 of the folded ring portion 311 less than the stiffness of the second end 315, when the magnetic flux corresponding to the magnetic gap at the first end 314 is less than the magnetic flux corresponding to the magnetic gap at the second end 315, the vibration system can be tuned by utilizing the stiffness of the first end 314 and the second end 315 of the diaphragm 31. This allows the first end 314 and the second end 315 of the diaphragm 31 to have the same amplitude under different driving forces, thereby effectively reducing the polarization of the diaphragm 31 and ensuring the performance of the acoustic device 100.
[0049] 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.
[0050] Specifically, the projection of the first end 314 onto the 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 the plane perpendicular to the vibration direction can be a straight line segment or an arc segment, where 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. The projection shapes of the first end 314 and the second end 315 can be the same or different. In this embodiment, the diaphragm 31 can be teardrop-shaped, bullet-shaped, trapezoidal, or other irregular shapes.
[0051] In one embodiment, at least one of the width or height of the folded ring portion 311 is continuously decreased from the first end portion 314 to the second end portion 315. In this way, the stiffness of the folded ring portion 311 can be adjusted by utilizing the height and / or width of the folded ring portion 311, and the stiffness of the folded ring portion 311 corresponding to the first end portion 314 is less than the stiffness corresponding to the second end portion 315.
[0052] 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 decreased 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 reduced while the stiffness of the second end 315 can be increased. Ultimately, the stiffness of the first end 314 of the folded ring portion 311 is less than the stiffness of the second end 315, 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, the amplitude of the folded ring portion 311 is not affected.
[0053] 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 reduce the thickness of the folded ring portion 311 corresponding to the first end 314, that is, make it less than the thickness of the folded ring portion 311 corresponding to the second end 315, in order to achieve the desired effect.
[0054] 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.
[0055] 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.
[0056] 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.
[0057] In one embodiment, the central magnetic part 22 includes a central magnet 221 and a central magnetic guide plate 222 stacked together, and the side magnetic part 23 includes a side magnet 231 and a side magnetic guide plate stacked together, and the unit magnetic flux of the central magnet 221 and the plurality of side magnets 231 is the same.
[0058] 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, and they are stacked together by adhesive bonding. The side magnet 231 is arranged in a strip shape and is specifically arranged around the central magnet 22. The side magnet 231 and the central magnet 221 have the same unit magnetic flux, meaning that the side magnet 231 and the central magnet 221 are magnets of the same grade, that is, the number of magnetic field lines passing through a unit area is roughly the same. This can help reduce assembly steps and improve the assembly efficiency of the acoustic device 100.
[0059] In one embodiment, the side magnets 231 include three, which are respectively disposed corresponding to the second end 315 and the two sides adjacent to the second end 315. Alternatively, the side magnets 231 include four, which are arranged around the central magnetic part 22.
[0060] The number of side magnets 231 can be determined based on the dimensions of the acoustic device 100. For example, when the length-to-width ratio of the acoustic device 100 is large, three side magnets 23 can be set; when the length-to-width ratio of the acoustic device 100 is small, four side magnets 23 can be set. The specific number can be selected according to the actual application and is not limited here.
[0061] In one embodiment, the acoustic device 100 further includes a housing 10, a side magnetic plate connected to the housing 10, at least a portion of the side magnet 231 having a gap with the housing 10, and the side magnetic plate having a vent hole in the area corresponding to the gap.
[0062] 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.
[0063] The side magnetic plate is connected to the housing. By providing vent holes 233 in the area corresponding to the gap of the side magnetic plate, 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.
[0064] Specifically, the number and size of the vents 233 can be adjusted as needed, and no limitation is made here.
[0065] In one embodiment, the edge magnetic plate is connected 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 edge magnetic plate, thereby helping to reduce the cost of the acoustic device 100 and improve the processing efficiency of the acoustic device 100.
[0066] 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.
[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] 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.
[0069] 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.
[0070] In one embodiment, the lead of the voice coil 32 is led out at either the first end 314 or the second end 315, and the side magnet portion 23 has clearance space for the lead of the voice coil 32 to be led out. This facilitates the lead-out of the voice coil 32, thereby reducing the mutual interference between the voice coil 32 and the side magnet portion 23.
[0071] 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.
[0072] 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.
[0073] 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.
[0074] 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.
[0075] 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.
[0076] 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.
[0077] 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 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 first end of the folded ring portion being smaller than the stiffness of the second end, the magnetic flux of the magnetic gap corresponding to the first end being smaller than the 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 thereof and extending to the midpoint of the first end; and / or at least one of the width and the height of the folded ring portion is continuously and gradually reduced 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 outer side of the center magnetic portion and forming the magnetic gap with the center magnetic portion.
4. The acoustic device of claim 3, wherein, the center magnetic portion comprises a center magnetic body and a center magnetic plate sequentially stacked on the magnetic yoke, the side magnetic portion comprises a side magnetic body and a side magnetic plate sequentially stacked on the magnetic yoke, and the unit magnetic flux of the center magnetic body and the plurality of side magnetic bodies are the same.
5. The acoustic device of claim 4, wherein, the side magnetic body comprises three, three side magnetic bodies are respectively arranged corresponding to the second end and the two sides adjacent to the second end; or the side magnetic body comprises four, four side magnetic bodies are arranged around the center magnetic portion.
6. The acoustic device of claim 3, wherein, the lead wire of the voice coil is led out corresponding to the first end or corresponding to the second end, and the side magnetic portion has a space for the lead wire of the voice coil to lead out.
7. The acoustic device of claim 4, wherein, The acoustic device further comprises a shell, the side magnetic plate is connected with the shell, and at least part of the side magnetic body has a gap between the shell, and the side magnetic plate is provided with a breathable hole corresponding to the area of the gap.
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; wherein the shell, the vibration system and the magnetic circuit system form a cavity, the shell is provided with a leakage hole communicating with the cavity; and / or the vibration system further comprises a vibration plate having an outer contour substantially the same as the outer contour of the diaphragm, the diaphragm further comprises an outer fixed portion arranged on the outer periphery of the folded ring portion and an inner fixed portion arranged on the inner periphery of the folded ring portion, the outer fixed portion is connected with the shell, and the inner fixed portion is connected with the vibration plate.
9. An acoustic assembly, characterized by The acoustic device comprises: The housing comprises a first section, a second section and a connecting section between the two, the connecting section having a third end close to the first section and a fourth end close to the second section, the third end having a width smaller than that of the fourth end; the acoustic device is accommodated in the housing, the first end portion is arranged opposite to the third end, and the second end portion is arranged opposite to the fourth end.
10. The acoustic assembly of claim 9, wherein, 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 inclination direction of the inclined edge portion.
11. The acoustic assembly of claim 9 or 10, wherein, The acoustic assembly is a glasses leg, wherein The first section is used 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.