Voice coil, sound production device and electronic equipment

Abstract

The invention discloses a voice coil, a sound production device and electronic equipment, and relates to the technical field of electroacoustic transduction, the voice coil is applied to the sound production device, the voice coil is flat, a body part of the voice coil comprises two long edges extending along a first direction, the two long edges are arranged at an interval along a second direction to form an interval groove, and the interval groove is arranged in the first direction. The voice coil further comprises a first supporting part arranged in the interval groove, and the two sides, in the second direction, of the first supporting part are connected with the two long edges respectively. Wherein the first direction is perpendicular to the second direction, the body part has a first extension length in the first direction and a second extension length in the second direction, the first extension length / the second extension length is larger than or equal to 3, the extension length of the first supporting part in the first direction is defined as L1, the extension length of the interval groove in the first direction is defined as L2, and L1 / L2 is larger than or equal to 0.1 and smaller than 1. The invention aims to provide the voice coil capable of effectively improving the structural strength, and the voice coil can reduce distortion and improve the high-frequency performance when being applied to the sound production device, so that the acoustic performance of the sound production device is improved.

Description

Technical Field

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

[0002] In recent years, with the rapid development of consumer electronics, electronic devices such as headphones, smartphones, and VR devices have gained widespread acceptance and adoption. Sound-generating devices are crucial electroacoustic transducers in consumer electronics, widely used in applications such as speakers, receivers, and headphones. As the performance of electronic products improves, the acoustic performance of these devices is also an inevitable trend.

[0003] In the related art, the sound-generating device using a flat voice coil structure has poor structural strength due to the large aspect ratio of the flat voice coil. The flat voice coil is easily deformed during vibration and resonates with itself, resulting in distortion and affecting high-frequency performance. Summary of the Invention

[0004] The main purpose of the present invention is to provide a voice coil, a sound-generating device and an electronic device, aiming to provide a voice coil that effectively improves structural strength. When used in a sound-generating device, the voice coil can reduce distortion, improve high-frequency performance, and thus improve the acoustic performance of the sound-generating device.

[0005] To achieve the above objectives, the present invention provides a voice coil for use in a sound-generating device. The voice coil is flat and has a main body. The main body includes two long sides extending in a first direction, and the two long sides are spaced apart in a second direction to form a spacing groove. The voice coil also includes a first support portion disposed in the spacing groove, and the first support portion is connected to the two long sides on both sides along the second direction.

[0006] In which, the first direction is perpendicular to the second direction, the main body has a first extension length along the first direction and a second extension length along the second direction, the first extension length / the second extension length ≥3, the extension length of the first support portion along the first direction is defined as L1, and the extension length of the spacing groove along the first direction is defined as L2, 0.1≤L1 / L2<1.

[0007] In one embodiment, the first supporting portion is formed by solidifying glue applied in the spacing groove.

[0008] In one embodiment, the glue is UV glue;

[0009] And / or, there are multiple first supporting portions, and the multiple first supporting portions are spaced apart and distributed along the first direction;

[0010] And / or, along a third direction, the outer surface of the first support portion is flush with the outer surface of the main body portion; wherein the third direction is perpendicular to the first direction and the second direction respectively.

[0011] In one embodiment, L1 ≥ 1 mm.

[0012] In one embodiment, the voice coil further includes a second supporting portion, the second supporting portion is located on at least one side of the body portion along the third direction, and the second supporting portion is respectively connected to the two long sides;

[0013] The third direction is perpendicular to the first direction and the second direction respectively.

[0014] In one embodiment, the second supporting portion is a metal sheet;

[0015] And / or, the second supporting parts are respectively provided on both sides of the main body along the third direction;

[0016] And / or, there are multiple second support portions, and the multiple second support portions are spaced apart and distributed along the first direction;

[0017] And / or, an extension length of the second supporting portion along the first direction is defined as L3; wherein 0.1≤L3 / L2<1;

[0018] And / or, an extension length of the second supporting portion along the first direction is L3; wherein L3 ≥ 1 mm.

[0019] The present invention also proposes a sound-generating device, which includes a vibration system. The vibration system includes a diaphragm assembly and a voice coil connected to the diaphragm assembly. The voice coil is the voice coil described above. The vibration system vibrates along the second direction.

[0020] In one embodiment, the diaphragm assembly includes a diaphragm and a vibration plate connected to the diaphragm. Along the second direction, the vibration plate is provided with a first reinforcing rib extending concavely toward a side close to the voice coil. The first reinforcing rib extends along the first direction and is connected to one of the long sides of the voice coil.

[0021] In one embodiment, the vibration system further includes a frame, wherein the frame includes two frames and is respectively provided at both ends of the voice coil along the first direction, one end of the frame is connected to the voice coil, and the other end of the frame is connected to the vibration plate, and the vibration plate is provided with a second reinforcing rib in an area corresponding to the frame;

[0022] The second reinforcing ribs are annular and enclose a connection area, and the frame is connected and fixed to the connection area.

[0023] In one embodiment, along the second direction, at least a portion of the second reinforcing rib protrudes and extends in a direction away from the voice coil to form a mounting groove, and a side of the frame close to the vibration plate is fixed in the mounting groove.

[0024] In one embodiment, the sound-generating device further includes a magnetic circuit system, the magnetic circuit system including a magnetic yoke and two magnetic circuit assemblies disposed on one side of the magnetic yoke, wherein the two magnetic circuit assemblies are respectively located on either side of the voice coil along a third direction, and the two magnetic circuit assemblies are spaced apart to form a magnetic gap, and a side of the voice coil away from the diaphragm assembly is inserted into the magnetic gap, and the third direction is perpendicular to the first direction and the second direction.

[0025] In which, each of the magnetic circuit components includes a first magnetic conductive plate, a first magnet, a second magnetic conductive plate and a second magnet stacked in sequence along the second direction, the first magnet and the second magnet of each magnetic circuit component are magnetized along the second direction and the magnetization directions are opposite, and the magnetization directions of the two first magnets and the two second magnets relative to each other along the third direction are opposite.

[0026] The present invention further provides an electronic device, which includes the above-mentioned sound-generating device.

[0027] The voice coil of the technical solution of the present invention is applied to a sound-producing device. The voice coil is flat, so that the body of the voice coil has two long sides extending in a first direction, and the two long sides are spaced apart in a second direction to form a spacing groove. The first direction is perpendicular to the second direction. By arranging a first support portion in the spacing groove, so that the first support portion is connected to the two long sides on both sides along the second direction, the first support portion is used to support and connect the two long sides of the flat voice coil, thereby improving the structural strength of the voice coil. In this way, when the voice coil is applied to the sound-producing device, the structural stability of the voice coil is improved during vibration, effectively avoiding deformation, thereby reducing distortion of the sound-producing device, improving high-frequency performance, and further improving the acoustic performance of the sound-producing device. At the same time, by setting the ratio of the extension length L1 of the first support portion in the first direction to the extension length L2 of the spacing groove in the first direction to be greater than or equal to 0.1 and less than 1, the structural strength of the voice coil is improved without making the voice coil too heavy, thereby ensuring the sound sensitivity of the sound-producing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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.

[0029] Figure 1 An exploded schematic diagram of an embodiment of a sound-generating device provided by the present invention;

[0030] Figure 2 A cross-sectional schematic diagram of an embodiment of a sound-generating device provided by the present invention;

[0031] Figure 3 A cross-sectional schematic diagram of another embodiment of the sound-generating device provided by the present invention;

[0032] Figure 4 A schematic structural diagram of an embodiment of a vibration plate provided by the present invention;

[0033] Figure 5 A schematic structural diagram of an embodiment of a voice coil provided by the present invention;

[0034] Figure 6 A schematic cross-sectional view of an embodiment of a voice coil provided by the present invention;

[0035] Figure 7 A cross-sectional schematic diagram of another embodiment of the voice coil provided by the present invention;

[0036] Figure 8 A cross-sectional schematic diagram of an embodiment of a magnetic circuit system provided by the present invention.

[0037] Description of Figure Numbers:

[0038] 100. Sound-generating device; 1. Shell; 2. Vibration system; 21. Diaphragm assembly; 211. Diaphragm; 212. Vibration plate; 213. First reinforcing rib; 214. Second reinforcing rib; 22. Voice coil; 221. Long side; 222. Spacing groove; 223. First support portion; 224. Second support portion; 23. Skeleton; 3. Magnetic circuit system; 31. Magnetic circuit assembly; 311. First magnetic plate; 312. First magnet; 313. Second magnetic plate; 314. Second magnet; 32. Magnetic yoke; 33. Magnetic gap.

[0039] 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

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] Reference Figures 1 to 8 As shown, the present invention provides a voice coil 22, which is used in a sound-generating device 100. As can be understood, the sound-generating device 100 includes a vibration system 2 and a magnetic circuit system 3 arranged relative to each other, so that the voice coil 22 of the vibration system 2 is located in the magnetic gap 33 of the magnetic circuit system 3. In this way, when power is applied, the voice coil 22 can vibrate in the magnetic gap 33 under the drive of the magnetic circuit system 3, thereby driving the diaphragm assembly 21 to vibrate and produce sound, thereby enabling the sound-generating device 100 to have a sound-generating function.

[0045] Please refer to Figures 1 to 3 、 Figures 5 to 7 As shown, in an embodiment of the present invention, the voice coil 22 is formed in a flat shape, and the voice coil 22 has a main body portion, the main body portion includes two long sides 221 extending along a first direction, and the two long sides 221 are spaced apart along a second direction to form a spacing groove 222, and the voice coil 22 also includes a first support portion 223 provided in the spacing groove 222, and the first support portion 223 is connected to the two long sides 221 on both sides along the second direction; wherein the first direction is perpendicular to the second direction, the main body portion has a first extension length along the first direction and a second extension length along the second direction, the first extension length / the second extension length ≥3, the extension length of the first support portion 223 along the first direction is defined as L1, the extension length of the spacing groove 222 along the first direction is defined as L2, and 0.1≤L1 / L2<1.

[0046] In this embodiment, by configuring the voice coil 22 in a flat shape, the voice coil 22 of the present invention is applied to the sound-generating device 100, making the structure of the sound-generating device 100 more compact and occupying less assembly space, compared to a sound-generating device having an annular voice coil and an annular magnetic gap. The sound-generating device 100 can optionally have a square structure, and has a length direction, a width direction, and a thickness direction. The length direction of the sound-generating device 100 is defined as a first direction, the thickness direction of the sound-generating device 100 is defined as a second direction (i.e., the vibration direction of the vibration system 2), and the width direction of the sound-generating device 100 is defined as a third direction. The first direction, the second direction, and the third direction are perpendicular to each other.

[0047] Understandably, Figures 1 to 3 、 Figures 5 to 7 As shown, the voice coil 22 is flat, with the body of the voice coil 22 having two long sides 221 extending along a first direction. The two long sides 221 are spaced apart along a second direction to form a spacing groove 222. The first direction is perpendicular to the second direction. In this embodiment, the body of the voice coil 22 has a first extension length along the first direction and a second extension length along the second direction. Optionally, the first extension length / second extension length ≥ 3.

[0048] It should be noted that the flat voice coil 22 has a length direction, a width direction and a thickness direction. The length direction of the voice coil 22 is consistent with the length direction of the sound-emitting device 100, the width direction of the voice coil 22 is consistent with the thickness direction of the sound-emitting device 100, and the thickness direction of the voice coil 22 is consistent with the width direction of the sound-emitting device 100.

[0049] It can be understood that when the flat voice coil 22 is used in the sound generating device 100 , the voice coil 22 extends along the first direction and vibrates along the second direction, and the thickness direction of the flat voice coil 22 is the third direction.

[0050] In this embodiment, if Figures 1 to 3 、 Figures 5 to 7 As shown, by providing a first support portion 223 on the voice coil 22 and arranging the first support portion 223 in the spacing groove 222, the first support portion 223 is connected to the two long sides 221 on both sides along the second direction. In this way, the first support portion 223 is used to support the two long sides 221 of the main body of the voice coil 22, so that the first support portion 223 is used to strengthen the structural strength of the two long sides 221 of the main body of the voice coil 22, thereby improving the structural strength of the voice coil 22. In this way, the voice coil 22 is applied to the sound-generating device 100, so that the voice coil 22 improves structural stability during vibration and effectively avoids deformation, thereby reducing the distortion of the sound-generating device 100, improving high-frequency performance, and further improving the acoustic performance of the sound-generating device 100.

[0051] In one embodiment, an extension length of the first support portion 223 along the first direction is defined as L1, and an extension length of the spacing groove 222 along the first direction is defined as L2. Optionally, 0.1≤L1 / L2<1.

[0052] It is understandable that when the extension length of the first support portion 223 along the first direction is too small, the first support portion 223 has a limited supporting effect on the body of the voice coil 22 and cannot improve the problem of high-frequency distortion. Figures 5 to 7 As shown, by setting the ratio of the extension length L1 of the first support portion 223 along the first direction to the extension length L2 of the spacing groove 222 along the first direction within the range of 0.1 to 1, the structural strength of the voice coil 22 can be improved without making the weight of the voice coil 22 too large, thereby ensuring the sound sensitivity of the sound-generating device 100.

[0053] It is understandable that the ratio of the extension length L1 of the first support portion 223 along the first direction to the extension length L2 of the spacing groove 222 along the first direction can be selected as 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, etc., which is not limited here.

[0054] Optionally, an extension length L1 of the first support portion 223 along the first direction is ≥1 mm. Through the above configuration, the first support portion 223 can meet the size requirements of the existing voice coil 22.

[0055] The voice coil 22 of the present invention is applied to the sound-generating device 100. The voice coil 22 is flat, so that the body of the voice coil 22 has two long sides 221 extending along a first direction, and the two long sides 221 are spaced apart along a second direction to form a spacing groove 222. The first direction is perpendicular to the second direction. By arranging a first support portion 223 in the spacing groove 222, the first support portion 223 is connected to the two long sides 221 on both sides along the second direction, so that the first support portion 223 is used to support the two long sides 221 of the flat voice coil 22. In this way, the structural strength of the voice coil 22 can be improved. The voice coil 22 is applied to the sound-generating device 100, so that the structural stability of the voice coil 22 during vibration is improved, deformation is effectively avoided, thereby reducing the distortion of the sound-generating device 100, improving the high-frequency performance, and thus improving the acoustic performance of the sound-generating device 100; at the same time, by setting the ratio of the extension length L1 of the first support portion 223 along the first direction to the extension length L2 of the spacing groove 222 along the first direction to be greater than or equal to 0.1 and less than 1, the structural strength of the voice coil 22 can be improved without making the weight of the voice coil 22 too large, thereby ensuring the sound sensitivity of the sound-generating device 100.

[0056] In one embodiment, the first support portion 223 is formed by curing glue applied to the spacing groove 222. Optionally, the glue is UV glue. As will be appreciated, the first support portion 223 is formed by applying glue to the spacing groove 222 of the body of the voice coil 22 and curing the glue with a UV lamp, causing the glue to solidify within the spacing groove 222.

[0057] Of course, in other embodiments, the first support portion 223 may also be a plastic component or a metal component, and this is not limited here.

[0058] Optionally, there are multiple first support portions 223, and the multiple first support portions 223 are spaced apart along the first direction. It is understood that by providing multiple first support portions 223, the multiple first support portions 223 are spaced apart along the first direction, and each first support portion 223 is connected to the two long sides 221 on both sides along the second direction. In this way, the multiple first support portions 223 can be used to respectively support the two long sides 221 of the flat voice coil 22, thereby further improving the structural strength of the voice coil 22 and preventing deformation of the voice coil 22 during vibration. This can effectively reduce distortion and improve high-frequency performance.

[0059] In one embodiment, along the third direction, the outer surface of the first support portion 223 is flush with the outer surface of the main body; wherein the third direction is perpendicular to the first direction and the second direction respectively.

[0060] In this embodiment, if Figures 1 to 3 、 Figures 5 to 7 As shown, the third direction is the thickness direction of the body of the voice coil 22. The body of the voice coil 22 has two surfaces disposed opposite to each other along the third direction. Optionally, the two surfaces of the first support portion 223 in the spacing groove 222 along the third direction are flush with the two surfaces of the body along the third direction. This can make the overall structure of the voice coil 22 more compact, prevent friction between the voice coil 22 and the magnetic circuit system 3 during vibration, and prevent noise.

[0061] In one embodiment, the voice coil 22 further includes a second support portion 224 located on at least one side of the body along a third direction. The second support portion 224 connects the two long sides 221 , respectively. The third direction is perpendicular to the first direction and the second direction.

[0062] In this embodiment, if Figure 3 and Figure 7As shown, by providing a second support portion 224 on the voice coil 22, the second support portion 224 is located on at least one side of the main body along the third direction, and the second support portion 224 is respectively connected to the two long sides 221. In this way, the structural strength of the voice coil 22 can be further improved by the second support portion 224, and the voice coil 22 can be prevented from deforming during vibration. In this way, distortion can be effectively reduced and high-frequency performance can be improved.

[0063] It will be appreciated that the two sides of the voice coil 22 along the third direction constitute the two surfaces of the body along the thickness direction (i.e., the two flat surfaces of the flat voice coil), and the spacing groove 222 extends through both surfaces of the body along the thickness direction along the third direction. Optionally, a second support portion 224 is provided on at least one side of the body of the voice coil 22 along the third direction. Optionally, a second support portion 224 is provided on both sides of the body along the third direction.

[0064] To further enhance the structural strength of the voice coil 22 and prevent deformation of the voice coil 22 during vibration, the second support portion 224 may be a metal sheet. In other embodiments, the second support portion 224 may also be a plastic member or formed by solidified glue, etc., which is not limited here.

[0065] Optionally, there are multiple second support portions 224, and the multiple second support portions 224 are spaced apart along the first direction. It is understood that by providing multiple second support portions 224, the multiple second support portions 224 are spaced apart along the first direction, and the multiple second support portions 224 are respectively connected to the two long sides 221, so that the second support portions 224 partially cover the spacing groove 222. In this way, the multiple second support portions 224 can be used to respectively support the two long sides 221 connected to the flat voice coil 22, thereby further improving the structural strength of the voice coil 22 and preventing deformation of the voice coil 22 during vibration. This can effectively reduce distortion and improve high-frequency performance.

[0066] It is understood that the multiple second support portions 224 can be provided on one side surface of the main body along the third direction; or, the multiple second support portions 224 can be provided on both side surfaces of the main body along the third direction. When the multiple second support portions 224 are provided on both side surfaces of the main body along the third direction, the multiple second support portions 224 on the two side surfaces of the main body along the third direction are provided in a one-to-one correspondence along the third direction; or, the multiple second support portions 224 on the two side surfaces of the main body along the third direction can be provided in a staggered manner along the third direction, which is not limited here.

[0067] In this embodiment, the first support portion 223 and the second support portion 224 of the voice coil 22 are arranged in a one-to-one correspondence along the third direction; or, the first support portion 223 and the second support portion 224 of the voice coil 22 are arranged in a staggered manner along the third direction, which is not limited here.

[0068] In one embodiment, an extension length of the second supporting portion 224 along the first direction is defined as L3 , wherein 0.1≦L3 / L2<1.

[0069] In this embodiment, if Figure 7 As shown, by setting the ratio of the extension length L3 of the second support portion 224 along the first direction to the extension length L2 of the spacing groove 222 along the first direction within the range of 0.1 to 1, the structural strength of the voice coil 22 can be improved without affecting the vibration of the voice coil 22 and without making the weight of the voice coil 22 too large.

[0070] It is understandable that the ratio of the extension length L3 of the second support portion 224 along the first direction to the extension length L2 of the spacing groove 222 along the first direction can be selected as 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, etc., which is not limited here.

[0071] Optionally, the extension length L3 of the second supporting portion 224 along the first direction is ≥1 mm. Through the above configuration, the first supporting portion 223 can meet the size requirements of the existing voice coil 22.

[0072] like Figures 1 to 3 As shown, the present invention further provides a sound-generating device 100, which includes the aforementioned voice coil 22. The specific structure of the voice coil 22 is similar to that of the aforementioned embodiments. Since the present sound-generating device 100 utilizes all the technical solutions of all the aforementioned embodiments, it at least has all the beneficial effects brought about by the technical solutions of the aforementioned embodiments, and will not be described in detail here.

[0073] In this embodiment, if Figures 1 to 3 As shown, the sound-generating device 100 includes a vibration system 2, which includes a diaphragm assembly 21 and a voice coil 22 connected to the diaphragm assembly 21. The voice coil 22 is the voice coil 22 described above. The vibration system 2 vibrates along the second direction. As will be appreciated, the voice coil 22 of the vibration system 2 is flat and drives the diaphragm assembly 21 to vibrate along the second direction.

[0074] In one embodiment, if Figures 1 to 3 、 Figure 8 As shown, the sound-generating device 100 further includes a magnetic circuit system 3 having a magnetic gap 33. The voice coil 22 is inserted into the magnetic gap 33 on the side away from the diaphragm assembly 21. When energized, the voice coil 22 vibrates under the drive of the magnetic circuit system 3, thereby driving the diaphragm assembly 21 connected to the voice coil 22 to vibrate and produce sound. Furthermore, by configuring the voice coil 22 in a flat shape, the sound-generating device 100 of the present invention is more compact and occupies less assembly space than a sound-generating device with an annular voice coil and an annular magnetic gap.

[0075] In one embodiment, the vibration system 2 further includes a skeleton 23 . The skeleton 23 includes two skeletons 23 , which are respectively arranged at both ends of the voice coil 22 along the first direction. One end of the skeleton 23 is connected to the voice coil 22 , and the other end of the skeleton 23 is connected to the diaphragm assembly 21 .

[0076] In this embodiment, if Figures 1 to 3 As shown, the voice coil 22 is connected to the diaphragm assembly 21 via a bobbin 23. The bobbin 23 can be used to adjust the vertical position and depth of the voice coil 22 within the magnetic gap 33, placing the voice coil 22 in a position with denser magnetic flux lines, thereby improving magnetic circuit utilization. Optionally, two bobbins 23 are provided, and the two bobbins 23 are disposed at both ends of the voice coil 22 along the second direction.

[0077] In one embodiment, the diaphragm assembly 21 includes a diaphragm 211 and a vibration plate 212 connected to the diaphragm 211. Along the second direction, the vibration plate 212 is provided with a first reinforcing rib 213 that extends concavely toward the side close to the voice coil 22. The first reinforcing rib 213 extends along the first direction and is connected to one of the long sides 221 of the voice coil 22.

[0078] In this embodiment, if Figures 1 to 4 As shown, the diaphragm 211 can optionally be arranged in a ring shape, and the vibration plate 212 is arranged in the central area of ​​the diaphragm 211. The skeleton 23 is connected to the vibration plate 212 at the corresponding position, thereby achieving a first connection between the voice coil 22 and the diaphragm assembly 21. At the same time, the vibration plate 212 is provided with a first reinforcing rib 213 that extends concavely toward the side close to the voice coil 22. The first reinforcing rib 213 is connected to the top of the voice coil 22 (i.e., one of the long sides 221 of the voice coil 22), thereby achieving a second connection between the voice coil 22 and the diaphragm assembly 21. Based on the above two connections, both ends and the middle of the voice coil 22 are connected to the diaphragm assembly 21. In this way, when the voice coil 22 is energized, the voice coil 22 can vibrate together with the diaphragm assembly 21, thereby preventing the diaphragm assembly 21 from generating split vibrations, thereby improving the high-frequency effect of the sound-generating device 100 and thus enhancing the sound quality of the sound-generating device 100.

[0079] Optionally, the vibration plate 212 is hot-pressed or injection-molded using one of magnesium-aluminum alloy, aluminum, polyethylene naphthalate, polyethylene terephthalate, liquid crystal polymer, or polyetherimide. Alternatively, the diaphragm 211 can be hot-pressed or injection-molded using one of silicone rubber, AEM rubber, or ACM rubber. In this embodiment, the prepared vibration plate 212 is placed as an insert in a mold, and then the diaphragm 211 is molded, so that the vibration plate 212 and diaphragm 211 form an integrated structure.

[0080] In this embodiment, the first reinforcing rib 213 extends along the first direction and is connected to one of the long sides 221 of the voice coil 22. Optionally, there are one or more first reinforcing ribs 213, and one or more first reinforcing ribs 213 extend along the first direction.

[0081] It is understood that there can be only one first reinforcing rib 213, which extends along the first direction of the vibration plate 212 (i.e., the length direction of the vibration plate 212). Of course, there can also be multiple first reinforcing ribs 213, for example, two, three, four, etc., and the multiple first reinforcing ribs 213 are spaced apart along the first direction of the vibration plate 212, and the specific arrangement can be customized according to needs.

[0082] Optionally, one or more first reinforcing ribs 213 are symmetrically arranged about the center line of the vibration plate 212 along the third direction (ie, the width direction of the vibration plate 212 ), which can further improve the balance between the voice coil 22 and the vibration plate 212 .

[0083] In one embodiment, the vibration system 2 also includes a skeleton 23, which includes two skeletons and is respectively arranged at the two ends of the voice coil 22 along the first direction. One end of the skeleton 23 is connected to the voice coil 22, and the other end of the skeleton 23 is connected to the vibration plate 212. The vibration plate 212 is provided with a second reinforcing rib 214 in the area corresponding to the skeleton 23; wherein the second reinforcing rib 214 is annular and encloses a connecting area, and the skeleton 23 is connected and fixed to the connecting area.

[0084] In this embodiment, if Figure 4 As shown, by setting a ring-shaped second reinforcing rib 214 to enclose the connection area in the area of ​​the vibration plate 212 corresponding to the skeleton 23, the second reinforcing rib 214 can be used to position the skeleton 23, thereby improving the positioning accuracy of the skeleton 23 and the vibration plate 212.

[0085] Optionally, both ends of the first reinforcing rib 213 are connected to the second reinforcing ribs 214; or, the first reinforcing rib 213 is spaced apart from the two second reinforcing ribs 214. It is understood that when there is only one first reinforcing rib 213, its ends may be connected to the two second reinforcing ribs 214, or, the ends of the first reinforcing rib 213 may be spaced apart from the two second reinforcing ribs 214. When there are multiple first reinforcing ribs 213, the ends of the first reinforcing rib 213 at both ends, which are close to the second reinforcing rib 214, may be connected to the two second reinforcing ribs 214, or, the ends of the first reinforcing rib 213 at both ends may be spaced apart from the two second reinforcing ribs 214. The specific method can be selected based on actual needs.

[0086] In one embodiment, at least a portion of the second reinforcing ribs 214 protrude and extend along the second direction away from the voice coil 22 to form a mounting groove, into which the side of the frame 23 proximal to the vibration plate 212 is secured. As will be appreciated, the mounting groove allows for more glue to be stored, thereby enhancing the stability of the connection between the vibration plate 212 and the frame 23.

[0087] In one embodiment, the vibration system 2 further includes two conductive supports, each of which is provided with a corresponding skeleton 23 located at either end of the voice coil 22. The two skeletons 23 are connected to the two conductive supports in a one-to-one relationship. It is understood that each conductive support is provided with at least two electrically connected spot welding pads, one of which is connected to an external power supply line, and the other spot welding pad of each conductive support is connected to a lead of the voice coil 22. This allows current to flow into the voice coil 22 through one conductive support and out through the other conductive support, thereby achieving electrical continuity between the voice coil 22 and the external power supply. Optionally, the skeleton 23 is an integrally formed structure.

[0088] Through the above arrangement, this embodiment solves the connection problem between the voice coil 22 and the external power supply and improves the balance of the voice coil 22 , thereby reducing the polarization phenomenon of the vibration system 2 .

[0089] In one embodiment, the sound-generating device 100 further includes a magnetic circuit system 3, which includes a magnetic yoke 32 and two magnetic circuit components 31 arranged on one side of the magnetic yoke 32. Along the third direction, the two magnetic circuit components 31 are respectively located on both sides of the voice coil 22, and the two magnetic circuit components 31 are spaced apart to form a magnetic gap 33. The side of the voice coil 22 away from the diaphragm assembly 21 is inserted into the magnetic gap 33, and the third direction is perpendicular to the first direction and the second direction.

[0090] In this embodiment, if Figures 1 to 3 、 Figure 8 As shown, two magnetic circuit assemblies 31 are arranged along the third direction and spaced apart to form a magnetic gap 33. The voice coil 22 of the vibration system 2 is flat and disposed in the magnetic gap 33. It can be understood that the magnetic gap 33 extends along the first direction and has a depth along the second direction, so that the voice coil 22 can vibrate along the second direction within the magnetic gap 33.

[0091] In one embodiment, each magnetic circuit component 31 includes a first magnetic conductive plate 311, a first magnet 312, a second magnetic conductive plate 313 and a second magnet 314 stacked in sequence along the second direction. The first magnet 312 and the second magnet 314 of each magnetic circuit component 31 are magnetized along the second direction and in opposite directions. The magnetization directions of the two first magnets 312 and the two second magnets 314 relative to each other along the third direction are opposite.

[0092] In this embodiment, if Figures 1 to 3 、 Figure 8 As shown, the second magnet 314 of each magnetic circuit assembly 31 is connected to one side of the magnetic yoke 32, the second magnetic conductive plate 313 is sandwiched between the first magnet 312 and the second magnet 314, and the first magnet 312 is sandwiched between the first magnetic conductive plate 311 and the second magnetic conductive plate 313. This ensures that the first magnetic conductive plate 311, the first magnet 312, the second magnetic conductive plate 313, and the second magnet 314 of the two magnetic circuit assemblies 31 correspond to each other along the third direction and are spaced apart to form a magnetic gap 33.

[0093] It can be understood that a first magnetic gap is formed between the two first magnetic conductive plates 311, and the long side 221 of the voice coil 22 close to the diaphragm 211 is located in the first magnetic gap. A second magnetic gap is formed between the two second magnetic conductive plates 313, and the long side 221 of the voice coil 22 away from the diaphragm 211 is located in the second magnetic gap. The utilization rate of the magnetic circuit system 3 is higher, and the voice coil 22 can obtain greater driving force.

[0094] In one embodiment, if Figures 1 to 3 As shown, the sound-generating device 100 further includes a housing 1 , and the vibration system 2 and the magnetic circuit system 3 are both fixed to the housing 1 .

[0095] In this embodiment, the housing 1 includes an annular support, and the diaphragm 211 is coupled to the inner circumference of the annular support. The diaphragm 211 and the annular support are integrally formed by hot pressing or injection molding. Optionally, the annular support is made of plastic and can be integrally formed with the diaphragm 211 of the vibration system 2 through an injection molding process.

[0096] As can be understood, the annular support is placed as an insert in the mold, and then the raw material of the diaphragm 211 is injection-molded into the mold to form the diaphragm 211. During the injection of the raw material, the raw material and the annular support are combined, thereby achieving a connection between the two, that is, the diaphragm 211 is combined with the inner circumferential wall of the annular support. Alternatively, the diaphragm 211 is integrally formed with the annular support through a hot pressing process.

[0097] In this embodiment, the diaphragm 211 and the annular bracket are integrally formed, which can improve the connection stability between the two. No glue is required between the diaphragm 211 and the annular bracket, thereby meeting the high-level waterproof requirements of electronic equipment.

[0098] In one embodiment, if Figures 1 to 3 As shown, the sound-generating device 100 further includes a waterproof sealing ring, which is combined with the outer peripheral wall of the annular bracket. The annular bracket and the waterproof sealing ring are an integrally formed structure.

[0099] It is understood that the waterproof sealing ring can be integrally formed with the annular support using a liquid silicone rubber injection molding process; alternatively, the waterproof sealing ring can be integrally formed with the annular support using a solid silicone rubber, AEM rubber, or ACM rubber through a hot pressing process. Furthermore, after the waterproof sealing ring and the annular support are integrally formed, the diaphragm 211 is combined with the annular support through a hot pressing process. Thus, the diaphragm 211, the annular support, and the waterproof sealing ring form an integrally molded structure. The assembled annular support has a higher waterproof rating.

[0100] In one embodiment, if Figures 1 to 3 As shown, the housing 1 further includes a bottom shell, which is an annular frame structure and is bonded or inlaid to the side of the annular bracket facing the magnetic circuit system 3. The magnetic circuit system 3 and the conductive support are connected in the bottom shell.

[0101] In this embodiment, the first magnetic conductive plate 311 is integrally injection-molded with the bottom housing, and the first magnet 312, the second magnet 314, or the first magnet 312, the second magnetic conductive plate 313, and the second magnet 314 are sequentially connected to the first magnetic conductive plate 311 by adhesive bonding. It will be appreciated that the two first magnetic conductive plates 311 can also provide support for the diaphragm 211 under high water pressure, thereby protecting the diaphragm 211 from damage due to the water pressure, thereby achieving a high degree of waterproofing.

[0102] In one embodiment, if Figure 1 As shown, the opposing ends of the two first magnetic conductive plates 311 of the two magnetic circuit assemblies 31 each have a clearance space formed therebetween for the first reinforcing ribs 213. Specifically, the distance between the two first magnetic conductive plates 311 is greater than the distance between the two first magnets 312. This clearance space reduces interference with the first reinforcing ribs 213, thereby increasing the vibration range of the vibration plate 212 and improving the sound quality of the sound-generating device 100.

[0103] Optionally, the two first magnetic conductive plates 311 of the two magnetic circuit assemblies 31 are an integrally formed structure and are integrally injection molded with the bottom shell of the housing 1 .

[0104] The present invention further provides an electronic device comprising the aforementioned sound-generating device 100. The specific structure of the sound-generating device 100 is similar to that of the aforementioned embodiments. Since the present electronic device utilizes all the technical solutions of all the aforementioned embodiments, it at least has all the beneficial effects brought about by the technical solutions of the aforementioned embodiments, and thus will not be described in detail here.

[0105] Optionally, the electronic device of the present invention may be a portable mobile electronic product such as a mobile phone or a tablet, or a wearable device such as a watch, VR, AR, etc., which is not specifically limited here.

[0106] 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 voice coil, used in a sound-generating device, characterized in that: The voice coil is formed in a flat shape and has a main body. The main body includes two long sides extending along a first direction, and the two long sides are spaced apart along a second direction to form a spacing groove. The voice coil also includes a first support portion provided in the spacing groove, and the first support portion is connected to the two long sides on both sides along the second direction respectively. In which, the first direction is perpendicular to the second direction, the main body has a first extension length along the first direction and a second extension length along the second direction, the first extension length / the second extension length ≥3, the extension length of the first support portion along the first direction is defined as L1, and the extension length of the spacing groove along the first direction is defined as L2, 0.1≤L1 / L2<1.

2. The voice coil according to claim 1, wherein The first supporting portion is formed by solidifying glue applied in the spacing groove.

3. The voice coil according to claim 2, wherein: The glue is UV glue; And / or, there are multiple first supporting portions, and the multiple first supporting portions are spaced apart and distributed along the first direction; And / or, along a third direction, the outer surface of the first support portion is flush with the outer surface of the main body portion; wherein the third direction is perpendicular to the first direction and the second direction respectively.

4. The voice coil according to claim 1, wherein L1≥1mm.

5. The voice coil according to claim 1, wherein The voice coil further includes a second supporting portion, the second supporting portion being located on at least one side of the body portion along the third direction, and the second supporting portion being connected to the two long sides respectively; The third direction is perpendicular to the first direction and the second direction respectively.

6. The voice coil according to claim 5, wherein The second supporting portion is a metal sheet; And / or, the second supporting parts are respectively provided on both sides of the main body along the third direction; And / or, there are multiple second support portions, and the multiple second support portions are spaced apart and distributed along the first direction; And / or, an extension length of the second supporting portion along the first direction is defined as L3; wherein 0.1≤L3 / L2<1; And / or, an extension length of the second supporting portion along the first direction is L3; wherein L3 ≥ 1 mm.

7. A sound-generating device, characterized in that: The sound-generating device includes a vibration system, the vibration system includes a diaphragm assembly and a voice coil connected to the diaphragm assembly, the voice coil is the voice coil according to any one of claims 1 to 6, and the vibration system vibrates along the second direction.

8. The sound-generating device according to claim 7, wherein: The diaphragm assembly includes a diaphragm and a vibration plate connected to the diaphragm. Along the second direction, the vibration plate is provided with a first reinforcing rib extending concavely toward a side close to the voice coil. The first reinforcing rib extends along the first direction and is connected to one of the long sides of the voice coil.

9. The sound-generating device according to claim 8, wherein: The vibration system further includes a frame, wherein the frame includes two frames and is respectively provided at both ends of the voice coil along the first direction, one end of the frame is connected to the voice coil, and the other end of the frame is connected to the vibration plate, and the vibration plate is provided with a second reinforcing rib in an area corresponding to the frame; The second reinforcing ribs are annular and enclose a connection area, and the frame is connected and fixed to the connection area.

10. The sound-generating device according to claim 9, wherein: Along the second direction, at least a portion of the second reinforcing ribs protrudes and extends in a direction away from the voice coil to form a mounting groove, and a side of the frame close to the vibration plate is fixed in the mounting groove.

11. The sound-generating device according to claim 7, wherein: The sound-generating device further includes a magnetic circuit system, the magnetic circuit system including a magnetic yoke and two magnetic circuit assemblies disposed on one side of the magnetic yoke, wherein the two magnetic circuit assemblies are respectively located on either side of the voice coil along a third direction, and the two magnetic circuit assemblies are spaced apart to form a magnetic gap, and a side of the voice coil away from the diaphragm assembly is inserted into the magnetic gap, wherein the third direction is perpendicular to the first direction and the second direction. In which, each of the magnetic circuit components includes a first magnetic conductive plate, a first magnet, a second magnetic conductive plate and a second magnet stacked in sequence along the second direction, the first magnet and the second magnet of each magnetic circuit component are magnetized along the second direction and the magnetization directions are opposite, and the magnetization directions of the two first magnets and the two second magnets relative to each other along the third direction are opposite.

12. An electronic device, characterized in that: The electronic device comprises the sound emitting device according to any one of claims 7 to 11.

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