Diaphragm for sound-generating device, sound-generating device and electronic equipment

Abstract

The present invention discloses a diaphragm for a sound-producing device, a sound-producing device, and an electronic device. The diaphragm for a sound-producing device has a long axis and a short axis connected end to end, with the ratio of the length of the long axis to the short axis being greater than or equal to 2. The diaphragm is provided with a hollow portion and a connecting portion, with the ends of the connecting portion connected to opposite sides of the hollow portion corresponding to the long axis, thereby dividing the hollow portion into spaced-apart hollow holes. The present invention aims to provide a diaphragm that effectively improves audio quality. When used in a sound-producing device, the diaphragm can reduce high THD distortion and enhance audio quality.

Description

Technical Field

[0001] The present invention relates to the technical field of electroacoustic conversion, and in particular to a diaphragm for a sound-generating device, and a sound-generating device and electronic equipment using the diaphragm. Background Art

[0002] Speakers, as electroacoustic devices that convert electrical signals into acoustic signals, are widely used in mobile phones, personal computers, and other terminal devices. A speaker's structure typically includes a magnetic circuit system, a vibration system, and auxiliary systems. The diaphragm, as part of the vibration system, is a crucial component for achieving electroacoustic energy conversion, and its performance directly affects the product's sound amplification.

[0003] In related technologies, with the rapid development of electronic products, higher requirements are placed on speakers. Speakers need to be more adaptable to the entire machine, and there is a demand for speakers to be narrower and longer. However, such a speaker structure will result in a larger length-to-width ratio of the diaphragm, which will increase the shrinkage and deformation of the diaphragm during vibration, resulting in higher THD distortion of the product and poor audio quality. Summary of the Invention

[0004] The main purpose of the present invention is to provide a diaphragm for a sound-emitting device, a sound-emitting device and an electronic device, aiming to provide a diaphragm that effectively improves the audio effect. The diaphragm is used in a sound-emitting device to reduce THD distortion and improve the audio effect.

[0005] To achieve the above object, the present invention provides a diaphragm for a sound-generating device, wherein the diaphragm has a long axis side and a short axis side connected end to end, and the ratio of the length of the long axis side to the short axis side is greater than or equal to 2;

[0006] The diaphragm is provided with a hollow portion and a connecting portion, and two ends of the connecting portion are connected to two opposite sides of the hollow portion corresponding to the long axis side, so as to divide the hollow portion into hollow holes arranged at intervals.

[0007] In one embodiment, the length of the major axis is defined as L1, the length of the minor axis is defined as L2, the vertical projection area of ​​the hollow hole is defined as S, and the number of the hollow holes is defined as N, where N≥2;

[0008] Among them, (N*S) / (L1*L2)≥0.27.

[0009] In one embodiment, the ratio of the extension length d1 of the connecting portion along the long axis to the length L1 of the long axis is in the range of 0.04 to 0.8;

[0010] And / or, a ratio of an extension length d2 of the connecting portion along the minor axis to a length L2 of the minor axis is in a range of 0.05 to 0.8.

[0011] In one embodiment, the connecting portion includes a plurality of connecting portions, and the plurality of connecting portions are arranged at intervals.

[0012] In one embodiment, the plurality of connecting portions are arranged at intervals along the extension direction of the long axis;

[0013] And / or, the plurality of connecting portions are symmetrically arranged about the central axis of the hollow portion.

[0014] In one embodiment, the Young's modulus of the diaphragm ranges from 20 MP to 350 MP;

[0015] And / or, the tensile strength of the diaphragm ranges from 30 MP to 100 MP.

[0016] In one embodiment, the ratio of the length of the major axis to the minor axis is less than or equal to 3.5.

[0017] The present invention further provides a sound-generating device, comprising:

[0018] shell;

[0019] a magnetic circuit system connected to the housing, the magnetic circuit system being provided with a magnetic gap; and

[0020] A vibration system, the vibration system includes a diaphragm assembly and a voice coil, one end of the voice coil is connected to the diaphragm assembly, and the other end of the voice coil is suspended in the magnetic gap, the diaphragm assembly includes the diaphragm for the sound-emitting device described above and a dome connected to the middle of the diaphragm, the diaphragm is connected to the housing and is opposite to the magnetic circuit system.

[0021] In one embodiment, the housing includes a plastic part and a metal part, and the plastic part and the metal part are integrally injection molded.

[0022] In one embodiment, the shell includes a vertical wall and a flat wall formed by bending one end of the vertical wall, the end of the vertical wall away from the flat wall is connected to the diaphragm, and the flat wall is provided with a connecting protrusion on one side of the long axis of the diaphragm assembly, and the connecting protrusion is connected to the magnetic circuit system.

[0023] In one embodiment, the straight wall is spaced apart from the magnetic circuit system on a side corresponding to the short axis side of the diaphragm assembly to form an air-permeable gap.

[0024] In one embodiment, the vibration system further includes a centering support plate provided corresponding to the air-permeable gap, one end of the centering support plate is connected to the straight wall, and the other end of the centering support plate is connected to the voice coil.

[0025] In one embodiment, the magnetic circuit system comprises:

[0026] A magnetic yoke, the magnetic yoke comprising a bottom wall and a side wall, the side wall being formed by bending and extending the periphery of the bottom wall toward the diaphragm assembly, the side wall and the bottom wall forming a mounting groove, and the side wall being connected to the housing; and

[0027] A magnetic circuit portion is disposed in the mounting groove and spaced apart from the side wall to form the magnetic gap.

[0028] The present invention further provides an electronic device, comprising a device housing and the above-mentioned sound-generating device, wherein the sound-generating device is arranged in the device housing.

[0029] The technical solution of the present invention reduces the weight of the diaphragm and improves the high-frequency sensitivity of the diaphragm by arranging a hollow portion on the diaphragm; at the same time, by arranging a connecting portion, the two ends of the connecting portion are connected to the opposite two sides of the long axis corresponding to the hollow portion, so as to separate the hollow portion into separately arranged hollow holes. In this way, when the length ratio of the long axis and the short axis of the diaphragm is greater than or equal to 2, the connecting portion is utilized to ensure that the low modulus diaphragm can have a lower deformation during the vibration process, thereby ensuring the product state and improving THD distortion. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0031] Figure 1 A schematic structural diagram of a diaphragm in one embodiment of the present invention;

[0032] Figure 2 A schematic structural diagram of a diaphragm in another embodiment of the present invention;

[0033] Figure 3 A schematic structural diagram of a diaphragm in another embodiment of the present invention;

[0034] Figure 4 A schematic structural diagram of a diaphragm assembly according to an embodiment of the present invention;

[0035] Figure 5 is a cross-sectional schematic diagram of a diaphragm assembly according to an embodiment of the present invention;

[0036] Figure 6 A schematic structural diagram of a sound-generating device according to an embodiment of the present invention;

[0037] Figure 7 is an exploded schematic diagram of a sound-generating device according to an embodiment of the present invention;

[0038] Figure 8 FIG. 1 is a cross-sectional schematic diagram of a sound-generating device according to an embodiment of the present invention.

[0039] Description of Figure Numbers:

[0040]

[0041]

[0042] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0044] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0045] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or an option in which both A and B are satisfied.

[0046] In addition, in the present invention, descriptions such as "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0047] Speakers, as electroacoustic devices that convert electrical signals into acoustic signals, are widely used in mobile phones, personal computers, and other terminal devices. A speaker's structure typically includes a magnetic circuit system, a vibration system, and auxiliary systems. The diaphragm, as part of the vibration system, is a crucial component for achieving electroacoustic energy conversion, and its performance directly affects the product's sound amplification.

[0048] In related technologies, with the rapid development of electronic products, higher requirements are placed on speakers. Speakers need to be more adaptable to the entire machine, and there is a demand for speakers to be narrower and longer. However, such a speaker structure will result in a larger length-to-width ratio of the diaphragm, which will increase the shrinkage and deformation of the diaphragm during vibration, resulting in higher THD distortion of the product and poor audio quality.

[0049] Based on the above concepts and problems, the present invention proposes a diaphragm 311, which is applied to a sound-generating device 100. It is understandable that the sound-generating device 100 can be applied to electronic devices such as speakers, headphones, and mobile phones, and is not limited here.

[0050] Please refer to Figures 1 to 8 As shown, in an embodiment of the present invention, the diaphragm 311 for the sound-emitting device has a long axis side 3113a and a short axis side 3113b connected end to end, and the length ratio of the long axis side 3113a to the short axis side 3113b is greater than or equal to 2; the diaphragm 311 is provided with a hollow portion 3111a and a connecting portion 3111c, and the two ends of the connecting portion 3111c are connected to the opposite side edges of the hollow portion 3111a corresponding to the long axis side 3113a, so as to separate the hollow portion 3111a into hollow holes 3111b arranged at intervals.

[0051] In a specific embodiment of the present application, the diaphragm 311 is arranged in a rectangular shape, and the diaphragm 311 has a long axis side 3113a and a short axis side 3113b connected end to end, that is, the diaphragm 311 has two opposite long axis sides 3113a and two short axis sides 3113b, and the two ends of the short axis side 3113b are respectively connected to the two long axis sides 3113a, and the two ends of the long axis side 3113a are respectively connected to the two short axis sides 3113b.

[0052] It is understood that the ratio of the length of the major axis 3113a to the minor axis 3113b of the diaphragm 311 is greater than or equal to 2, that is, the ratio of the extended length of the major axis 3113a to the extended length of the minor axis 3113b of the diaphragm 311 is not less than 2. In this case, the ratio of the major axis 3113a to the minor axis 3113b of the diaphragm 311 is large, so that when the diaphragm 311 is used in the sound-emitting device 100, the diaphragm 311 will experience increased contraction and deformation during vibration, resulting in higher THD distortion of the sound-emitting device 100 and poor audio quality.

[0053] In this embodiment, by providing a hollow portion 3111a on the diaphragm 311, the overall weight of the diaphragm 311 can be effectively reduced. Optionally, a hollow portion 3111a is provided at the central position of the diaphragm 311, and the hollow portion 3111a can be selected as a through hole, a hollow hole, or an opening. In order to strengthen the structural strength of the diaphragm 311 and prevent the diaphragm 311 from shrinking and deforming more during the vibration process, the diaphragm 311 is further provided with a connecting portion 3111c. The connecting portion 3111c is located in the hollow portion 3111a, and the two ends of the connecting portion 3111c are connected to the opposite two sides of the long axis side 3113a of the hollow portion 3111a, so as to separate the hollow portion 3111a into hollow holes 3111b arranged at intervals. In this way, the connecting portion 3111c can be used to strengthen the structural strength of the diaphragm 311 at the long axis side 3113a, while preventing the diaphragm 311 from shrinking and deforming more during vibration, thereby reducing the THD distortion of the sound-generating device 100 and improving the audio effect.

[0054] The present invention reduces the weight of the diaphragm 311 and improves the high-frequency sensitivity of the diaphragm 311 by providing a hollow portion 3111a on the diaphragm 311; at the same time, by providing a connecting portion 3111c, the two ends of the connecting portion 3111c are connected to the opposite two sides of the hollow portion 3111a corresponding to the long axis side 3113a, so as to separate the hollow portion 3111a into separately arranged hollow holes 3111b. In this way, when the length ratio of the long axis side 3113a and the short axis side 3113b of the diaphragm 311 is greater than or equal to 2, the connecting portion 3111c is used to ensure that the low modulus diaphragm 311 can have a lower deformation during vibration, thereby ensuring the product status and improving THD distortion.

[0055] In one embodiment, the ratio of the lengths of the major axis 3113a and the minor axis 3113b is less than or equal to 3.5. That is, the ratio of the lengths of the major axis 3113a and the minor axis 3113b (the aspect ratio) of the diaphragm 31 is between 2 and 3.5. For example, the aspect ratio of the diaphragm 311 can be 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.1, 3.2, 3.3, 3.4, 3.5, etc. Thus, through the above configuration, the size selection of the diaphragm 311 can be broadened, and it can be applied to products of different specifications.

[0056] In one embodiment, the length of the major axis side 3113a is defined as L1, the length of the minor axis side 3113b is defined as L2, the vertical projection area of ​​the hollow hole 3111b is defined as S, and the number of the hollow holes 3111b is defined as N, N≥2; wherein, (N*S) / (L1*L2)≥0.27.

[0057] In this embodiment, if Figures 1 to 5As shown, by controlling and adjusting the ratio of the total area of ​​all hollow holes 3111b to the area of ​​the diaphragm 311 to be greater than or equal to 0.27, the structural strength of the diaphragm 311 is ensured while reducing the weight of the diaphragm 311, thereby ensuring the vibration performance of the diaphragm 311. Optionally, (N*S) / (L1*L2)≤0.75.

[0058] It is understood that the number of connecting portions 3111c provided in the hollow portion 3111a is W. When W ≥ 1, the number N of hollow holes 3111b formed in the hollow portion 3111a is W + 1. In one embodiment, the connecting portions 3111c include a plurality of connecting portions 3111c, which are spaced apart. Optionally, the connecting portions 3111c include two, three, four, five, or more.

[0059] Optionally, the multiple connecting portions 3111c are spaced apart along the longitudinal direction of the long axis 3113a. This effectively ensures the structural strength of the diaphragm 311 along the long axis 3113a and reduces deformation. Optionally, the multiple connecting portions 3111c are symmetrically arranged about the central axis of the hollow portion 3111a. This ensures uniform structural strength and more uniform deformation of the diaphragm 311 along the long axis 3113a.

[0060] In this embodiment, the number of hollow holes 3111b is defined as N, N≥2, and the vertical projection area of ​​the hollow holes 3111b is defined as S. At this time, the total area of ​​all hollow holes 3111b is N*S, and the area of ​​the diaphragm 311 is the product of the length L1 of the long axis side 3113a and the length L2 of the short axis side 3113b.

[0061] Optionally, the ratio of the total area of ​​all hollow holes 3111b to the area of ​​the diaphragm 311 is 0.27, 0.3, 0.4, 0.5, etc., which is not limited here.

[0062] In one embodiment, the ratio of the extension length d1 of the connecting portion 3111 c along the long axis side 3113 a to the length L1 of the long axis side 3113 a ranges from 0.04 to 0.8.

[0063] Understandably, Figures 1 to 4 As shown, by controlling and adjusting the ratio of the extension length d1 of the connecting portion 3111c along the long axis side 3113a to the length L1 of the long axis side 3113a to be in the range of 0.04 to 0.8, the diaphragm 311 can reduce the weight of the diaphragm 311 while ensuring the vibration effect of the diaphragm 311.

[0064] In this embodiment, when there are multiple connecting parts 3111c, d1 is the sum of the extension lengths of the multiple connecting parts 3111c along the long axis side 3113a, that is, the ratio of the sum of the extension lengths d1 of the multiple connecting parts 3111c along the long axis side 3113a to the length L1 of the long axis side 3113a is in the range of 0.04 to 0.8.

[0065] Optionally, the ratio of the extension length d1 of the connecting portion 3111c along the long axis side 3113a to the length L1 of the long axis side 3113a is 0.04, 0.05, 0.06, 0.07, 0.8, etc., which is not limited here.

[0066] In one embodiment, a ratio of an extension length d2 of the connecting portion 3111 c along the short axis side 3113 b to a length L2 of the short axis side 3113 b ranges from 0.05 to 0.8.

[0067] Understandably, Figures 1 to 4 As shown, by controlling and adjusting the ratio of the extension length d2 of the connecting portion 3111c along the short axis side 3113b to the length L2 of the short axis side 3113b to be in the range of 0.05 to 0.8, the diaphragm 311 can reduce the weight of the diaphragm 311 while ensuring the vibration effect of the diaphragm 311.

[0068] In this embodiment, d1 is the distance between the two ends of the connecting portion 3111c connected to the opposite sides of the long axis 3113a of the hollow portion 3111a. Optionally, the connecting portion 3111c is parallel to the short axis 3113b. The connecting portion 3111c is perpendicular to the long axis 3113a.

[0069] Optionally, the ratio of the extension length d2 of the connecting portion 3111c along the short axis side 3113b to the length L2 of the short axis side 3113b is 0.05, 0.1, 0.2, 0.3, 0.4, 0.8, etc., which is not limited here.

[0070] In one embodiment, the Young's modulus of the diaphragm 311 ranges from 20 MPa to 350 MPa. It is understood that this configuration can effectively ensure the low-frequency performance of the diaphragm 311. Optionally, the Young's modulus of the diaphragm 311 is 20 MPa, 50 MPa, 80 MPa, 100 MPa, 130 MPa, 150 MPa, 180 MPa, 200 MPa, 230 MPa, 250 MPa, 280 MPa, 300 MPa, 330 MPa, 350 MPa, etc., without limitation herein.

[0071] In one embodiment, the tensile strength of the diaphragm 311 ranges from 30 MPa to 100 MPa. It is understood that this configuration can effectively ensure the vibration performance of the diaphragm 311. Optionally, the tensile strength of the diaphragm 311 ranges from 30 MPa, 40 MPa, 50 MPa, 60 MPa, 70 MPa, 80 MPa, 90 MPa, 100 MPa, etc., without limitation herein.

[0072] It is understandable that the relatively low hardness of the diaphragm 311 can improve the low-frequency performance of the sound-generating device 100. However, when the ratio of the length of the major axis 3113a to the minor axis 3113b of the diaphragm 311 is greater than or equal to 2, the diaphragm 311 contracts and deforms more during vibration, resulting in higher THD distortion and poor audio quality. The present invention provides a connecting portion 3111c within the hollow portion 3111a of the diaphragm 311. This connection portion 3111c ensures that the low-modulus diaphragm 311 has a lower deformation during vibration, thereby maintaining product quality and improving THD distortion.

[0073] In one embodiment, the diaphragm 311 includes a central portion 3111, a folded ring portion 3112 arranged around the central portion 3111, and a fixed portion 3113 connected to the outside of the folded ring portion 3112, and the central portion 3111 is provided with a hollow portion 3111a and a connecting portion 3111c; wherein, the folded ring portion 3112 includes a first segment 3112a extending along the long axis side 3113a and a second segment 3112b extending along the short axis side 3113b, and the extension length a of the first segment 3112a along the short axis side 3113b is less than the extension length b of the second segment 3112b along the long axis side 3113a.

[0074] In this embodiment, if Figures 1 to 8 As shown, the central portion 3111, the folding portion 3112, and the fixing portion 3113 of the diaphragm 311 are integrally formed. The folding portion 3112 surrounds the central portion 3111 and is located between the central portion 3111 and the fixing portion 3113. The folding portion 3112 can be a raised structure facing upward or downward. The diaphragm 311 is connected and fixed to the housing 1 of the sound-generating device 100 via the fixing portion 3113, thereby improving the stability and sealing of the connection between the housing 1 and the diaphragm 311.

[0075] In order to increase the effective vibration area of ​​the diaphragm 311 , the fixing portion 3113 may be formed by extending downward or upward from the outer side of the folding ring portion 3112 , so that the fixing portion 3113 is connected and fixed to the inner wall or outer wall of the housing 1 .

[0076] As can be understood, the outer periphery of the fixed portion 3113 of the diaphragm 311 includes a long axis 3113a and a short axis 3113b connected end to end. A hollow portion 3111a is provided in the central portion 3111. The inner wall of the hollow portion 3111a and the folded ring portion 3112 form an inner ring structure. The connecting portion 3111c is provided corresponding to the hollow portion 3111a, and the two ends of the connecting portion 3111c connect to the two sides of the inner ring structure corresponding to the long axis 3113a, thereby dividing the hollow portion 3111a into spaced-apart hollow holes 3111b.

[0077] In this embodiment, the folding ring portion 3112 is configured to include a first section 3112a and a second section 3112b connected end to end, so that the first section 3112a extends along the long axis 3113a and the second section 3112b extends along the short axis 3113b, and the extension length a of the first section 3112a along the short axis 3113b is configured to be smaller than the extension length b of the second section 3112b along the long axis 3113a, that is, the widths of the folding ring portion 3112 are configured to be unequal, thereby obtaining inconsistent compliance on opposite sides of the diaphragm 311, and combining with the asymmetry of the outer shell structure of many current sound-emitting devices 100, thereby ultimately achieving balance of the entire system.

[0078] It will be appreciated that the width of the first segment 3112a is the length a extending from the first segment 3112a along the minor axis 3113b, and the width of the second segment 3112b is the length b extending from the second segment 3112b along the major axis 3113a. In this embodiment, the width of the first segment 3112a is uniform along the major axis 3113a, and the width of the second segment 3112b is uniform along the minor axis 3113b. Of course, in other embodiments, the width of the first segment 3112a may be different along the major axis 3113a, and the width of the second segment 3112b may be different along the minor axis 3113b, without limitation herein.

[0079] In one embodiment, a ratio of an extension length b of the second segment 3112 b along the major axis 3113 a to an extension length a of the first segment 3112 a along the minor axis 3113 b ranges from 1 to 3.

[0080] In this embodiment, by adjusting and controlling the ratio of the width of the second section 3112b to the width of the first section 3112a to be in the range of 1 to 3, the overall vibration performance of the diaphragm 311 is ensured and the high-frequency performance is improved. That is, the ratio of the extension length b of the second section 3112b along the major axis side 3113a to the extension length a of the first section 3112a along the minor axis side 3113b is in the range of 1 to 3.

[0081] Optionally, the ratio of the extension length b of the second section 3112b along the major axis 3113a to the extension length a of the first section 3112a along the minor axis 3113b is 1, 1.5, 2, 3.5, 3, etc., which is not limited here.

[0082] In one embodiment, the ratio of the extension length b of the second section 3112b along the long axis 3113a to the length L1 of the long axis 3113a is in the range of 0.04 to 0.15. It is understood that by adjusting and controlling the ratio of the width of the second section 3112b to the length L1 of the long axis 3113a to be in the range of 0.04 to 0.15, the vibration performance of the diaphragm 311 along the short axis 3113b is ensured. That is, the ratio of the extension length b of the second section 3112b along the long axis 3113a to the length L1 of the long axis 3113a is in the range of 0.04 to 0.15.

[0083] Optionally, the ratio of the extension length b of the second segment 3112b along the long axis side 3113a to the length L1 of the long axis side 3113a is 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.11, 0.12, 0.13, 0.14, 0.15, etc., which is not limited here.

[0084] In one embodiment, the ratio of the extension length a of the first section 3112a along the minor axis 3113b to the length L2 of the minor axis 3113b is in the range of 0.05 to 0.22. It is understood that by adjusting and controlling the ratio of the width of the first section 3112a to the length L2 of the minor axis 3113b to be in the range of 0.05 to 0.22, the vibration performance of the diaphragm 311 along the major axis 3113a is ensured. That is, the ratio of the extension length a of the first section 3112a along the minor axis 3113b to the length L2 of the minor axis 3113b is in the range of 0.05 to 0.22.

[0085] Optionally, the ratio of the extension length a of the first segment 3112a along the short axis side 3113b to the length L2 of the short axis side 3113b is 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17, 0.18, 0.19, 0.2, 0.21, 0.22, etc., which is not limited here.

[0086] like Figures 6 to 8 As shown, the present invention also proposes a sound-producing device 100, which includes the above-mentioned diaphragm 311 for the sound-producing device. The specific structure of the diaphragm 311 refers to the aforementioned embodiment. Since the diaphragm 311 adopts all the technical solutions of all the aforementioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the aforementioned embodiments, which will not be repeated here.

[0087] In this embodiment, the sound-generating device 100 includes a housing 1, a magnetic circuit system 2 and a vibration system 3, wherein the magnetic circuit system 2 is connected to the housing 1 and is provided with a magnetic gap 21. The vibration system 3 includes a diaphragm assembly 31 and a voice coil 32. One end of the voice coil 32 is connected to the diaphragm assembly 31, and the other end of the voice coil 32 is suspended in the magnetic gap 21. The diaphragm assembly 31 includes the above-mentioned diaphragm 311 for the sound-generating device and a dome 312 connected to the middle of the diaphragm 311. The diaphragm 311 is connected to the housing 1 and is opposite to the magnetic circuit system 2.

[0088] In this embodiment, housing 1 is used to mount, secure, support, and protect components such as vibration system 3 and magnetic circuit system 2. In other words, housing 1 provides a mounting base for components such as vibration system 3 and magnetic circuit system 2. It is understood that housing 1 may be a mounting shell, housing, or box having a mounting cavity. In other words, housing 1 defines a receiving space, which is not limited herein.

[0089] Optionally, the housing 1 has a rectangular structure, and has a long side and a short side corresponding to the long axis 3113a and the short axis 3113b of the diaphragm 311. It can be understood that the housing 1 has two opposite long sides and two short sides, with the ends of the short sides respectively connected to the two long sides, and the ends of the long sides respectively connected to the two short sides, so that the housing 1 defines a receiving space.

[0090] It is understood that when the housing 1 is metal, the magnetic circuit system 2 is fixed to the housing 1 by bonding or welding. In another embodiment, when the housing 1 is plastic injection molded, the side magnetic conductive plate of the magnetic circuit system 2 is first injection molded into the housing 1 as an insert, or the magnetic circuit system 2 is fixed to the housing 1 by bonding, and then the other parts are bonded and fixed, which is not limited here.

[0091] In this embodiment, the magnetic circuit system 2 is disposed within the housing and connected to the housing 1. The magnetic circuit system 2 is provided with a magnetic gap 21. The vibration system 3 includes a diaphragm assembly 31 and a voice coil 32 connected to the diaphragm assembly 31. One end of the voice coil 32 is connected to the diaphragm assembly 31, while the other end of the voice coil 32 is suspended within the magnetic gap 21. This connects the voice coil 32 to the external circuit and transmits electrical energy to the magnetic gap 21 of the magnetic circuit system 2. The magnetic field generated by the magnetic circuit system 2 converts the electrical energy into mechanical energy, causing the voice coil 32 to vibrate. This in turn drives the diaphragm 311 of the diaphragm assembly 31 to vibrate and produce sound, further converting the mechanical energy into acoustic energy. Specifically, upon receiving an external alternating current signal, the voice coil 32, driven by the magnetic field of the magnetic circuit system 2, reciprocates, cutting through the magnetic lines of force, driving the diaphragm 311 of the vibration system 3 to vibrate and produce sound.

[0092] It can be understood that the diaphragm assembly 31 includes a diaphragm 311 and a dome 312 connected to the center of the diaphragm 311. In this embodiment, the dome 312 is connected to the central portion 3111 of the diaphragm 311. The dome 312 can be arranged on the side of the diaphragm 311 facing the voice coil 32, that is, the dome 312 is arranged between the diaphragm 311 and the voice coil 32. Of course, the dome 312 can also be arranged on the side of the diaphragm 311 facing away from the voice coil 32, that is, the voice coil 32 is connected to the diaphragm 311. By arranging the dome 312 at the center of the diaphragm 311, the structural strength of the diaphragm 311 can be strengthened by using the dome 312.

[0093] In this embodiment, the outer periphery of the diaphragm 311 of the diaphragm assembly is connected to the housing 1, so that the diaphragm 311, the housing 1, and the magnetic circuit system 2 enclose a sound cavity. The dome 312 is connected to the central portion 3111 and the connecting portion 3111c of the diaphragm 311, and covers the hollow hole 3111b.

[0094] In one embodiment, the housing 1 includes a plastic component 12 and a metal component 11 , and the plastic component 12 and the metal component 11 are integrally injection-molded.

[0095] In this embodiment, if Figure 7 and Figure 8 As shown, by setting the shell 1 as a structure in which the plastic part 12 and the metal part 11 are integrally injection-molded, the structural strength of the shell 1 is ensured, and at the same time the thickness of the shell 1 is effectively reduced, thereby increasing the sound cavity volume of the sound-emitting device 100 and improving the acoustic effect of the sound-emitting device 100.

[0096] It is understood that the metal component 11 is embedded in the plastic component 12, that is, a cavity is provided in the plastic component 12, and the metal component 11 is disposed within the cavity. In this embodiment, the plastic component 12 is wrapped around the housing of the metal component 11. Optionally, the plastic component 12 is made of a plastic material, and the metal component 11 is formed by processing a metal sheet. The metal component 11 formed by processing a metal sheet is placed in a mold, and liquid plastic material is injected into the mold so that the liquid plastic material wraps around the outside of the metal component 11, thereby forming a housing 1 in which the plastic component 12 and the metal component 11 are integrally injection-molded.

[0097] In this embodiment, the plastic component 12 and the metal component 11 of the housing 1 can be integrally formed by injection molding, which can improve the structural strength of the housing 1 and the sealing effect of the housing 1.

[0098] In one embodiment, the housing 1 includes a vertical wall 13 and a flat wall 14 formed by bending one end of the vertical wall 13. The end of the vertical wall 13 away from the flat wall 14 is connected to the diaphragm 311. The flat wall 14 has a connecting protrusion 15 protruding from one side of the long axis edge 3113a corresponding to the diaphragm assembly 31, and the connecting protrusion 15 is connected to the magnetic circuit system 2.

[0099] In this embodiment, if Figure 7 and Figure 8 As shown, the vertical wall 13 and the flat wall 14 of the housing 1 are arranged at an angle and enclose a receiving space. The flat wall 14 is formed by bending one end of the vertical wall 13 toward the receiving space. It can be understood that the outer periphery of the diaphragm 311 of the diaphragm assembly is connected to the end of the vertical wall 13 away from the flat wall 14 to cover the opening at one end of the receiving space. By protruding a connecting protrusion 15 on the side corresponding to the long axis edge of the flat wall 14, the connecting protrusion 15 is connected to the magnetic circuit system 2, so that the diaphragm 311, the vertical wall 13, the flat wall 14, the connecting protrusion 15 and the magnetic circuit system 2 cooperate to form a sound cavity.

[0100] As will be understood, the plastic component 12 of the housing 1 is formed with a vertical wall 13 and a flat wall 14. The metal component 11 is disposed within the plastic component 12, with a portion of the metal component 11 located within the vertical wall 13 and a portion of the metal component 11 located within the flat wall 14. In this embodiment, the flat wall 14 has a first sidewall corresponding to the long axis of the housing 1 and a second sidewall corresponding to the short axis. A connecting protrusion 15 is provided on the first sidewall of the flat wall 14, thereby connecting to the magnetic circuit system 2 via the connecting protrusion 15, thereby improving the stability of the connection between the magnetic circuit system 2 and the housing 1.

[0101] In one embodiment, a side of the straight wall 14 corresponding to the short axis side 3113 b of the diaphragm assembly 31 is spaced apart from the magnetic circuit system 2 to form an air-permeable gap 16 .

[0102] In this embodiment, if Figure 8 As shown, the side of the straight wall 14 corresponding to the short axis side is the second side wall, and the second side wall is separated from the magnetic circuit system 2 to form an air-permeable gap 16 connected to the sound cavity. In this way, the air-permeable gap 16 can be used to balance the air pressure in the sound cavity to improve the vibration effect of the diaphragm 311.

[0103] When the ratio of the length of the long side to the short side of the diaphragm 311 is not less than 2, when the diaphragm 311 vibrates driven by the voice coil 32, the airflow within the acoustic cavity cannot be promptly leaked along the long axis side of the housing 1. As a result, the vibration of the diaphragm 311 is reflected in the long axis direction, forming a standing wave. This results in a poor high-frequency response of the speaker, which in turn affects the audio quality. In this embodiment, by providing a sound leakage hole connected to the acoustic cavity in the first side wall, the sound leakage hole is used to promptly leak the sound airflow generated by the vibration of the diaphragm 311 in the long axis direction when the diaphragm 311 vibrates, preventing the sound airflow from being reflected in the long axis direction, that is, preventing the formation of standing waves, thereby improving the high-frequency response of the sound-generating device 100 and thus enhancing the audio quality.

[0104] In one embodiment, the vibration system 3 further includes a centering support 33 provided corresponding to the air permeable gap 16 . One end of the centering support 33 is connected to the straight wall 14 , and the other end of the centering support 33 is connected to the voice coil 32 .

[0105] In this embodiment, if Figure 7 and Figure 8 As shown, by providing a centering support plate 33, one end of the centering support plate 33 is connected to the straight wall 14 of the shell 1, and the other end of the centering support plate 33 is connected to the voice coil 32, so that the centering support plate 33 is used to balance and stabilize the vibration of the diaphragm 311 driven by the voice coil 32, thereby preventing the voice coil 32 from driving the diaphragm 311 to swing or polarize.

[0106] It can be understood that the centering support plate 33 can be made of FPCB, or a conductive circuit can be set in the centering support plate 33, so that one end of the centering support plate 33 can be conductively connected to the lead of the voice coil 32, and the other end of the centering support plate 33 is fixed on the shell 1 for connecting to the external circuit. In this way, the external circuit is connected to the voice coil 32 by using the centering support plate 33, which effectively avoids the risk of the lead of the voice coil 32 being broken during vibration.

[0107] In this embodiment, there are two centering supports 33, which are symmetrically arranged. The two centering supports 33 respectively correspond to the air gaps 16 on the corresponding short axis sides of the shell 1. In this way, the air gaps 16 can be understood to balance the air pressure in the sound cavity, and the air gaps 16 can be used to provide installation avoidance space for the centering supports 33 to ensure that the centering supports 33 will not interfere with the vibration of the voice coil 32.

[0108] As you can understand, the centering support 33 includes an external fixing portion connected to the housing 1, an internal fixing portion connected to the voice coil 32, and an elastic portion connected between the external and internal fixing portions. The internal fixing portion extends from the elastic portion toward both sides of the long axis and bends toward the voice coil 32. In this embodiment, the internal fixing portion is provided with an internal solder pad that is welded to the voice coil 32. The external fixing portion is provided with an external solder pad that facilitates soldering and connection to an external circuit.

[0109] In one embodiment, the magnetic circuit system 2 includes a magnetic yoke 22 and a magnetic circuit portion 23. The magnetic yoke 22 includes a bottom wall 221 and a side wall 222. The side wall 222 is formed by bending and extending the periphery of the bottom wall 221 toward the diaphragm assembly 31. The side wall 222 and the bottom wall 221 enclose a mounting groove 223. The side wall 222 is connected to the outer shell 1. The magnetic circuit portion 23 is arranged in the mounting groove 223 and is spaced from the side wall 222 to form a magnetic gap 21.

[0110] In this embodiment, if Figure 7 and Figure 8As shown, the magnetic yoke 22 can be made of a magnetic plate. By setting the magnetic yoke 22 as a bottom wall 221 and a side wall 222 provided on the periphery of the bottom wall 221, the side wall 222 and the bottom wall 221 are enclosed to form a mounting groove 223, so that the magnetic circuit part 23 is installed and fixed using the mounting groove 223. It can be understood that the magnetic circuit system 2 is connected and fixed to the shell 1 through the side wall 222 of the magnetic yoke 22. The side wall 222 is connected and fixed to the connecting protrusion 15 of the straight wall 14 of the shell 1. Optionally, the connecting protrusion 15 and the side wall 222 can be connected by bonding or welding, which is not limited here.

[0111] As will be appreciated, the magnetic circuit portion 23 is disposed within the mounting groove 223 and is spaced from the sidewall 222 to form a magnetic gap 21, thereby providing mounting space for the voice coil 32. In this embodiment, the magnetic circuit portion 23 includes a stacked central magnet and a central magnetic conductive plate. The central magnet is sandwiched between the central magnetic conductive plate and the bottom wall 221, such that the periphery of the central magnet and the central magnetic conductive plate is spaced from the sidewall 222 to form the magnetic gap 21. The magnetic field generated by the magnetic circuit portion 23 acts on the voice coil 32 within the magnetic gap 21, driving the voice coil 32 to move within the magnetic gap 21 and cut through the magnetic flux lines.

[0112] Optionally, the central magnet and the central magnetic conductive plate have the same structural profile, and the central magnet and the central magnetic conductive plate can be plate-shaped structures or ring-shaped structures, which are not limited here.

[0113] In one embodiment, the side wall 222 includes a plurality of side walls 222, which are spaced apart along the periphery of the bottom wall 221. Figures 2 to 6 As shown, the magnetic yoke 22 has a square structure, that is, the bottom wall 221 of the magnetic yoke 22 has a square structure. The bottom wall 221 has four side edges, and the four side edges of the bottom wall 221 are bent and extended toward one side of the diaphragm 311 to form side walls 222 .

[0114] It is understood that the sidewall 222 can be an annular structure. Of course, there are four sidewalls 222, which are arranged corresponding to the four sides of the bottom wall 221. In other words, a gap is formed between two adjacent sidewalls 222. This gap facilitates the centering arm 33 to pass through the gap, extend into the magnetic gap 21, and connect with the voice coil 32.

[0115] In one embodiment, the bottom wall 221 is provided with a groove 224 corresponding to the magnetic gap 21, and the groove 224 is provided around the magnetic circuit portion 23. It can be understood that Figures 2 to 4 As shown, a groove 224 is provided on the bottom wall 221 , thereby utilizing the groove 224 to provide an escape space for the movement of the voice coil 32 .

[0116] In this embodiment, the groove 224 is arranged around the magnetic circuit part 23, that is, a protrusion structure is formed in the middle of the bottom wall 221, and the groove 224 is arranged around the protrusion structure. The central magnet of the magnetic circuit part 23 is connected to the protrusion structure of the bottom wall 221.

[0117] The present invention further provides an electronic device comprising a device housing and the aforementioned sound-generating device 100, with the sound-generating device 100 disposed within the device housing. The specific structure of the sound-generating device 100 is similar to that of the aforementioned embodiments. Since this electronic device utilizes all of the technical solutions of all of the aforementioned embodiments, it possesses at least all of the beneficial effects provided by the technical solutions of the aforementioned embodiments, and therefore will not be further elaborated upon here.

[0118] The above descriptions are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention's description and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A diaphragm for a sound-generating device, characterized in that: The diaphragm has a long axis side and a short axis side connected end to end, and the ratio of the length of the long axis side to the short axis side is greater than or equal to 2 and less than or equal to 3.5; The diaphragm includes a central portion, a folded ring portion arranged around the central portion, and a fixed portion connected to the outer side of the folded ring portion. The central portion is provided with a plurality of hollow portions and a plurality of connecting portions. Both ends of the connecting portion are connected to two opposite sides of the hollow portion corresponding to the long axis side to divide the hollow portion into hollow holes arranged at intervals. The plurality of hollow portions and the plurality of connecting portions are arranged at intervals along the extension direction of the long axis side. The connecting portions reduce the deformation of the diaphragm during vibration. The length of the major axis is defined as L1, the length of the minor axis is defined as L2, the vertical projection area of ​​the hollow hole is defined as S, and the number of the hollow holes is defined as N, where N ≥ 2; wherein (N * S) / (L1 * L2) ≥ 0.27; the ratio of the sum of the extension lengths d1 of the plurality of connecting portions along the major axis to the length L1 of the major axis is in the range of 0.04 to 0.8; The ratio of the extension length d2 of the connecting portion along the short axis to the length L2 of the short axis is in the range of 0.05 to 0.8; the Young's modulus of the diaphragm is in the range of 20 MP to 350 MP.

2. The diaphragm for a sound-generating device according to claim 1, characterized in that: The connecting parts include a plurality of connecting parts, and the plurality of connecting parts are arranged at intervals.

3. The diaphragm for a sound-generating device according to claim 2, characterized in that: The plurality of connecting portions are arranged at intervals along the extension direction of the long axis; And / or, the plurality of connecting portions are symmetrically arranged about the central axis of the hollow portion.

4. The diaphragm for a sound-generating device according to claim 1, characterized in that: The tensile strength of the diaphragm ranges from 30MP to 100MP.

5. A sound-generating device, characterized in that: The sound-generating device comprises: shell; a magnetic circuit system connected to the housing, the magnetic circuit system being provided with a magnetic gap; and A vibration system comprising a diaphragm assembly and a voice coil, one end of the voice coil being connected to the diaphragm assembly, and the other end of the voice coil being suspended in the magnetic gap, the diaphragm assembly comprising a diaphragm for a sound-emitting device as claimed in any one of claims 1 to 4 and a dome connected to the middle of the diaphragm, the diaphragm being connected to the housing and opposite to the magnetic circuit system.

6. The sound-generating device according to claim 5, characterized in that: The housing comprises a plastic part and a metal part, and the plastic part and the metal part are integrally injection-molded.

7. The sound-generating device according to claim 5, characterized in that: The shell includes a vertical wall and a flat wall formed by bending one end of the vertical wall. The end of the vertical wall away from the flat wall is connected to the diaphragm. The flat wall is provided with a connecting protrusion on one side of the long axis of the diaphragm assembly, and the connecting protrusion is connected to the magnetic circuit system.

8. The sound-generating device according to claim 7, characterized in that: The straight wall is spaced apart from the magnetic circuit system on a side corresponding to the short axis side of the diaphragm assembly to form an air-permeable gap.

9. The sound-generating device according to claim 8, characterized in that: The vibration system further includes a centering support plate arranged corresponding to the air-permeable gap, one end of the centering support plate is connected to the straight wall, and the other end of the centering support plate is connected to the voice coil.

10. The sound-generating device according to claim 5, characterized in that: The magnetic circuit system comprises: A magnetic yoke, the magnetic yoke comprising a bottom wall and a side wall, the side wall being formed by bending and extending the periphery of the bottom wall toward the diaphragm assembly, the side wall and the bottom wall forming a mounting groove, and the side wall being connected to the housing; and A magnetic circuit portion is disposed in the mounting groove and spaced apart from the side wall to form the magnetic gap.

11. An electronic device, characterized in that: The device comprises a device housing and a sound-generating device according to any one of claims 5 to 10, wherein the sound-generating device is arranged in the device housing.

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