Voice coil, sound production device and electronic device

Abstract

This utility model discloses a voice coil, a sound-generating device, and an electronic device, relating to the field of electroacoustic transduction technology. The voice coil is applied to a sound-generating device and is flat. The voice coil has a body portion, which includes two long sides extending along a first direction. These two long sides are spaced apart along a second direction to form a spacer groove. The voice coil also includes a first support portion disposed within the spacer groove. The first support portion is connected to the two long sides on both sides along the second direction, wherein the first direction is perpendicular to the second direction. This utility model aims to provide a voice coil that effectively improves structural strength. When applied to a sound-generating device, this voice coil can reduce distortion, improve high-frequency performance, and thus enhance the acoustic performance of the sound-generating device.

Description

Technical Field

[0001] This utility model relates to the field of electroacoustic transduction technology, and in particular to a voice coil and a sound-generating device and electronic device using the voice coil. Background Technology

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

[0003] In related technologies, sound-generating devices using flat voice coil structures suffer from poor structural strength due to the excessive aspect ratio of the flat voice coil. Furthermore, the flat voice coil is prone to deformation during vibration, which can cause it to resonate, resulting in distortion and affecting high-frequency performance. Utility Model Content

[0004] The main purpose of this utility model is to provide a voice coil, a sound-generating device, and an electronic device. It aims to provide a voice coil that effectively improves structural strength. When applied to a sound-generating device, this voice coil can reduce distortion, improve high-frequency performance, and thus enhance the acoustic performance of the sound-generating device.

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

[0006] Wherein, the first direction is perpendicular to the second direction.

[0007] In one embodiment, the first support portion is formed by the curing of adhesive applied to the spacer groove.

[0008] In one embodiment, the adhesive is a UV adhesive;

[0009] And / or, there are multiple first support portions, and the multiple first support portions are distributed at intervals 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 body portion; wherein, the third direction is perpendicular to the first direction and the second direction, respectively.

[0011] In one embodiment, the extension length of the first support portion along the first direction is defined as L1, and the extension length of the spacer groove along the first direction is defined as L2.

[0012] Where 0.1 ≤ L1 / L2 < 1; and / or, L1 ≥ 1 mm.

[0013] In one embodiment, the voice coil further includes a second support portion located on at least one side of the body portion along a third direction, and the second support portion is connected to two of the long sides respectively;

[0014] The third direction is perpendicular to both the first direction and the second direction.

[0015] In one embodiment, the second support portion is a metal sheet;

[0016] And / or, the main body is provided with the second support portion on both sides along the third direction;

[0017] And / or, there are multiple second support portions, and the multiple second support portions are distributed at intervals along the first direction;

[0018] And / or, define the extension length of the second support portion along the first direction as L3, and define the extension length of the spacer groove along the first direction as L2; ​​wherein, 0.1≤L3 / L2<1;

[0019] And / or, define the extension length of the second support portion along the first direction as L3; wherein, L3≥1mm.

[0020] This utility model also proposes a sound-generating device, which includes a vibration system, the vibration system including a diaphragm assembly and a voice coil connected to the diaphragm assembly, the voice coil being the voice coil described above.

[0021] The vibration system vibrates along the second direction.

[0022] In one embodiment, the diaphragm assembly includes a diaphragm and a vibrating plate connected to the diaphragm. Along the second direction, the vibrating plate is provided with a first reinforcing rib extending recessed toward the side near 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.

[0023] In one embodiment, the vibration system further includes a frame, which comprises two frames respectively disposed 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 diaphragm. The diaphragm is provided with a second reinforcing rib in the area corresponding to the frame.

[0024] The second reinforcing rib is annular and encloses a connecting area, and the skeleton is fixedly connected to the connecting area.

[0025] In one embodiment, at least a portion of the second reinforcing rib extends in the second direction away from the voice coil to form a mounting groove, and the side of the frame near the diaphragm is fixed in the mounting groove.

[0026] In one embodiment, the sound-generating device further includes a magnetic circuit system, which includes a magnetic yoke and two magnetic circuit components disposed on one side of the magnetic yoke. The two magnetic circuit components are respectively located on both sides of the voice coil along a third direction. The two magnetic circuit components are spaced apart to form a magnetic gap. The side of the voice coil away from the diaphragm assembly is inserted into the magnetic gap. The third direction is perpendicular to the first direction and the second direction, respectively.

[0027] Each of the magnetic circuit components includes a first magnetic guide plate, a first magnet, a second magnetic guide plate, and a second magnet stacked sequentially along the second direction. The first magnet and the second magnet of each magnetic circuit component are magnetized along the second direction but in opposite directions. The magnetization directions of two first magnets and two second magnets opposite each other along the third direction are also opposite.

[0028] This utility model also proposes an electronic device, which includes the sound-generating device described above.

[0029] The voice coil of this invention is used in a sound-generating device. The voice coil is flat and has two long sides extending along a first direction. These two long sides are spaced apart along a second direction to form a spacer groove. The first and second directions are perpendicular. A first support portion is provided in the spacer groove, connecting to the two long sides along the second direction on both sides. This supports the two long sides of the flat voice coil, thus improving its structural strength. Applying the voice coil to a sound-generating device improves its structural stability during vibration, effectively preventing deformation, reducing distortion, improving high-frequency performance, and ultimately enhancing the acoustic performance of the sound-generating device. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0031] Figure 1 An exploded view of an embodiment of the sound-generating device provided by this utility model;

[0032] Figure 2 A cross-sectional schematic diagram of an embodiment of the sound-generating device provided by this utility model;

[0033] Figure 3 A cross-sectional schematic diagram of another embodiment of the sound-generating device provided by this utility model;

[0034] Figure 4 A schematic diagram of the structure of an embodiment of the vibrating plate provided by this utility model;

[0035] Figure 5 A schematic diagram of the structure of an embodiment of the voice coil provided by this utility model;

[0036] Figure 6 A cross-sectional schematic diagram of an embodiment of the voice coil provided by this utility model;

[0037] Figure 7 A cross-sectional schematic diagram of another embodiment of the voice coil provided by this utility model;

[0038] Figure 8 A cross-sectional schematic diagram of an embodiment of the magnetic circuit system provided by this utility model.

[0039] Explanation of icon numbers:

[0040] 100. Sound-generating device; 1. Housing; 2. Vibration system; 21. Diaphragm assembly; 211. Diaphragm; 212. Vibrating plate; 213. First reinforcing rib; 214. Second reinforcing rib; 22. Voice coil; 221. Long side; 222. Spacing groove; 223. First support part; 224. Second support part; 23. Frame; 3. Magnetic circuit system; 31. Magnetic circuit assembly; 311. First magnetic guide plate; 312. First magnet; 313. Second magnetic guide plate; 314. Second magnet; 32. Magnetic yoke; 33. Magnetic gap.

[0041] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0043] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0044] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0045] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0046] Reference Figures 1 to 8 As shown, this utility model proposes a voice coil 22, which is applied in a sound-generating device 100. It is understood that the sound-generating device 100 includes a vibration system 2 and a magnetic circuit system 3 arranged opposite to each other, such that the voice coil 22 of the vibration system 2 is located in the magnetic gap 33 of the magnetic circuit system 3. Thus, when energized, 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 generate sound, thus enabling the sound-generating device 100 to have a sound-generating function.

[0047] Please refer to the reference. Figures 1 to 3 , Figures 5 to 7 As shown, in this embodiment of the present invention, the voice coil 22 is formed in a flat shape. The voice coil 22 has a body portion, which includes two long sides 221 extending along a first direction. The two long sides 221 are spaced apart along a second direction to form a spacer groove 222. The voice coil 22 also includes a first support portion 223 disposed in the spacer groove 222. The first support portion 223 is connected to the two long sides 221 on both sides along the second direction. The first direction is perpendicular to the second direction.

[0048] In this embodiment, by setting the voice coil 22 to a flat shape, compared to a sound-generating device with a ring voice coil and a ring magnetic gap, the voice coil 22 of this invention, when applied to the sound-generating device 100, makes the structure of the sound-generating device 100 more compact and occupies less assembly space. The sound-generating device 100 can be a square structure, having a length direction, a width direction, and a thickness direction. The length direction of the sound-generating device 100 is defined as the first direction, the thickness direction of the sound-generating device 100 is defined as the 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 the third direction, and the first direction, the second direction, and the third direction are all perpendicular to each other.

[0049] Understandable, such as Figures 1 to 3 , Figures 5 to 7 As shown, the voice coil 22 is flat, such that its body 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 spacer groove 222, wherein the first direction and the second direction are perpendicular. 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 ratio of the first extension length to the second extension length is ≥3.

[0050] 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-generating device 100, the width direction of the voice coil 22 is consistent with the thickness direction of the sound-generating device 100, and the thickness direction of the voice coil 22 is consistent with the width direction of the sound-generating device 100.

[0051] Understandably, when the flat voice coil 22 is applied in the sound-generating device 100, the voice coil 22 extends along the first direction and vibrates along the second direction, while the thickness direction of the flat voice coil 22 is the third direction.

[0052] In this embodiment, as Figures 1 to 3 , Figures 5 to 7 As shown, by providing a first support portion 223 on the voice coil 22 and placing the first support portion 223 within the spacer groove 222, the first support portion 223 is connected to two long sides 221 on both sides along the second direction. In this way, the first support portion 223 supports the two long sides 221 of the body of the voice coil 22, thereby strengthening the structural strength of the two long sides 221 of the body of the voice coil 22 and improving the structural strength of the voice coil 22. By applying the voice coil 22 to the sound-generating device 100, the structural stability of the voice coil 22 is improved during vibration, effectively avoiding deformation, thereby reducing the distortion of the sound-generating device 100, improving high-frequency performance, and thus improving the acoustic performance of the sound-generating device 100.

[0053] The voice coil 22 of this invention is applied in a sound-generating device 100. The voice coil 22 is flat and has two long sides 221 extending along a first direction. The two long sides 221 are spaced apart along a second direction to form a spacer groove 222. The first direction and the second direction are perpendicular. A first support 223 is provided in the spacer groove 222, and the first support 223 is connected to the two long sides 221 on both sides along the second direction. The first support 223 supports the two long sides 221 of the flat voice coil 22, thereby improving the structural strength of the voice coil 22. By applying the voice coil 22 to the sound-generating device 100, the structural stability of the voice coil 22 is improved during vibration, effectively avoiding deformation, thereby reducing the distortion of the sound-generating device 100, improving high-frequency performance, and thus improving the acoustic performance of the sound-generating device 100.

[0054] In one embodiment, the first support portion 223 may optionally be formed by curing adhesive applied to the spacer groove 222. Optionally, the adhesive is a UV adhesive. It is understood that the first support portion 223 is formed by applying adhesive to the spacer groove 222 of the body portion of the voice coil 22 and curing the adhesive with a UV lamp.

[0055] Of course, in other embodiments, the first support portion 223 may also be a plastic part or a metal part, etc., and is not limited here.

[0056] Optionally, there are multiple first support portions 223, which are spaced apart along a first direction. It is understood that by providing multiple first support portions 223, which are spaced apart along the first direction, and each first support portion 223 is connected to two long sides 221 on both sides along a second direction, the multiple first support portions 223 can respectively support the two long sides 221 of the flat voice coil 22. This further improves the structural strength of the voice coil 22, prevents deformation of the voice coil 22 during vibration, effectively reduces distortion, and improves high-frequency performance.

[0057] In one embodiment, along a third direction, the outer surface of the first support portion 223 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.

[0058] In this embodiment, as Figures 1 to 3 , Figures 5 to 7As shown, the third direction is the thickness direction of the body portion of the voice coil 22, and the body portion of the voice coil 22 has two surfaces that are opposite to each other along the third direction. Optionally, the two surfaces of the first support portion 223 in the spacer groove 222 along the third direction are flush with the two surfaces of the body portion along the third direction, which can make the overall structure of the voice coil 22 more compact, prevent the voice coil 22 from rubbing against the magnetic circuit system 3 during vibration, and prevent noise.

[0059] In one embodiment, the extension length of the first support portion 223 along the first direction is defined as L1, and the extension length of the spacer groove 222 along the first direction is defined as L2. Optionally, 0.1 ≤ L1 / L2 < 1.

[0060] It is understandable that when the extension length of the first support portion 223 along the first direction is too small, the supporting effect of the first support portion 223 on the body portion of the voice coil 22 is limited, and it cannot improve the high-frequency distortion problem. In this embodiment, as... Figures 5 to 7 As shown, by setting the ratio of the extension length L1 of the first support 223 along the first direction to the extension length L2 of the spacer 222 along the first direction in 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 generation sensitivity of the sound generating device 100.

[0061] Understandably, the ratio of the extension length L1 of the first support portion 223 along the first direction to the extension length L2 of the spacer 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., and is not limited here.

[0062] Optionally, the extension length L1 of the first support portion 223 along the first direction is ≥1mm. With the above configuration, the first support portion 223 can meet the size requirements of the voice coil 22 in existing models.

[0063] In one embodiment, the voice coil 22 further includes a second support portion 224, which is located on at least one side of the main body portion along a third direction, and the second support portion 224 is connected to two long sides 221 respectively; wherein the third direction is perpendicular to the first direction and the second direction respectively.

[0064] In this embodiment, as Figure 3 and Figure 7 As 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 in a third direction, and the second support portion 224 is connected to two long sides 221 respectively. 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. This can effectively reduce distortion and improve high-frequency performance.

[0065] Understandably, the two sides of the voice coil 22 along the third direction are the two surfaces of the body portion in the thickness direction (i.e., the two flat surfaces of the flat voice coil), and the spacer groove 222 penetrates the two surfaces of the body portion in the thickness direction along the third direction. Optionally, a second support portion 224 is provided on at least one surface of the body portion of the voice coil 22 along the third direction. Optionally, a second support portion 224 is provided on both sides of the body portion along the third direction.

[0066] To further improve the structural strength of the voice coil 22 and prevent it from deforming during vibration, the second support portion 224 can be a metal sheet. Of course, in other embodiments, the second support portion 224 can also be a plastic part or formed by the solidification of adhesive, etc., and is not limited here.

[0067] Optionally, there are multiple second support portions 224, which are spaced apart along the first direction. It is understood that by providing multiple second support portions 224, which are spaced apart along the first direction, and each second support portion 224 connecting to two long sides 221, the second support portions 224 partially cover the spacer slots 222. This allows the multiple second support portions 224 to support the two long sides 221 of the flat voice coil 22, further improving the structural strength of the voice coil 22 and preventing deformation during vibration. This effectively reduces distortion and improves high-frequency performance.

[0068] Understandably, the plurality of second support portions 224 may be provided on one side surface of the main body along a third direction; or, the plurality of second support portions 224 may be provided on both sides surface of the main body along a third direction. When the plurality of second support portions 224 are provided on both sides surface of the main body along a third direction, the plurality of second support portions 224 on both sides surface of the main body along a third direction are provided in a one-to-one correspondence along the third direction; or, the plurality of second support portions 224 on both sides surface of the main body along a third direction are provided in a staggered manner along the third direction, which is not limited here.

[0069] 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 a 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 a third direction, which is not limited here.

[0070] In one embodiment, the extension length of the second support portion 224 along the first direction is defined as L3, and the extension length of the spacer groove 222 along the first direction is defined as L2. Optionally, 0.1 ≤ L3 / L2 < 1.

[0071] In this embodiment, as Figure 7As shown, by setting the ratio of the extension length L3 of the second support 224 along the first direction to the extension length L2 of the spacer 222 along the first direction in 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 the weight of the voice coil 22 will not be too large.

[0072] Understandably, the ratio of the extension length L3 of the second support 224 along the first direction to the extension length L2 of the spacer 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., and is not limited here.

[0073] Optionally, the extension length L3 of the second support portion 224 along the first direction is ≥1mm. With the above arrangement, the first support portion 223 can meet the size requirements of the voice coil 22 of the existing model.

[0074] like Figures 1 to 3 As shown, this utility model also proposes a sound-generating device 100, which includes the aforementioned voice coil 22. The specific structure of the voice coil 22 is as described in the foregoing embodiments. Since this sound-generating device 100 adopts all the technical solutions of all the foregoing embodiments, it has at least all the beneficial effects brought about by the technical solutions of the foregoing embodiments, and will not be described in detail here.

[0075] In this embodiment, as 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 same as described above. The vibration system 2 vibrates along a second direction. It can be understood that the voice coil 22 of the vibration system 2 is flat, and the voice coil 22 drives the diaphragm assembly 21 to vibrate along the second direction.

[0076] In one implementation, such as Figures 1 to 3 , Figure 8 As shown, the sound-generating device 100 also includes a magnetic circuit system 3, which has a magnetic gap 33. The voice coil 22 is inserted into the magnetic gap 33 on the side away from the diaphragm assembly 21. In this way, the voice coil 22 can vibrate under the drive of the magnetic circuit system 3 when energized, thereby driving the diaphragm assembly 21 connected to the voice coil 22 to vibrate and generate sound. At the same time, by setting the voice coil 22 to a flat shape, compared with a sound-generating device with a ring voice coil and a ring magnetic gap, the structure of the sound-generating device 100 of this utility model is more compact and occupies less assembly space.

[0077] In one embodiment, the vibration system 2 further includes a frame 23, which includes two frames and is respectively disposed at both ends of the voice coil 22 along the first direction. One end of the frame 23 is connected to the voice coil 22, and the other end of the frame 23 is connected to the diaphragm assembly 21.

[0078] In this embodiment, as Figures 1 to 3 As shown, the voice coil 22 is connected to the diaphragm assembly 21 via the frame 23. This allows the frame 23 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 field lines, thereby improving the utilization rate of the magnetic circuit. Optionally, there are two frames 23, with the two frames 23 respectively located at both ends of the voice coil 22 along the second direction.

[0079] In one embodiment, the diaphragm assembly 21 includes a diaphragm 211 and a vibrating plate 212 connected to the diaphragm 211. Along the second direction, the vibrating plate 212 is provided with a first reinforcing rib 213 extending recessed toward the side near 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.

[0080] In this embodiment, as Figures 1 to 4 As shown, the diaphragm 211 can optionally be arranged in a ring shape, and the diaphragm plate 212 is located in the central region of the diaphragm 211. The frame 23 is connected to the diaphragm plate 212 at the corresponding position, thus realizing the first connection between the voice coil 22 and the diaphragm assembly 21. At the same time, the diaphragm plate 212 is provided with a first reinforcing rib 213 extending recessed towards the side close to the voice coil 22. This first reinforcing rib 213 is connected to the top of the voice coil 22 (that is, one of the long sides 221 of the voice coil 22), thus realizing the 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. Thus, when the voice coil 22 is energized, the voice coil 22 can vibrate together with the diaphragm assembly 21, thereby avoiding the diaphragm assembly 21 from producing segmented vibration, thereby improving the high-frequency effect of the sound-generating device 100 and improving the sound quality of the sound-generating device 100.

[0081] Optionally, the vibrating plate 212 is formed by hot pressing or injection molding using one of the following materials: magnesium-aluminum alloy, aluminum, polyethylene naphthalate, polyethylene terephthalate, liquid crystal polymer, or polyetherimide. Optionally, the diaphragm 211 can be formed by hot pressing or injection molding using one of the following materials: silicone rubber, AEM rubber, or ACM rubber. In this embodiment, the prepared vibrating plate 212 is placed as an insert in a mold, and then the diaphragm 211 is formed, thus the vibrating plate 212 and the diaphragm 211 form an integral structure.

[0082] In this embodiment, the first reinforcing rib 213 extends along a first direction and is connected to one of the long sides 221 of the voice coil 22. Optionally, there may be one or more first reinforcing ribs 213, which extend along the first direction.

[0083] Understandably, there can be one first reinforcing rib 213, which extends along the first direction of the vibrating plate 212 (i.e., the length direction of the vibrating plate 212). Of course, there can also be multiple first reinforcing ribs 213, such as two, three, or four, which are spaced apart along the first direction of the vibrating plate 212. The specific arrangement can be customized according to the needs.

[0084] Optionally, one or more first reinforcing ribs 213 are symmetrically arranged about the center line of the diaphragm 212 along a third direction (i.e., the width direction of the diaphragm 212), which can further improve the balance between the voice coil 22 and the diaphragm 212.

[0085] In one embodiment, the vibration system 2 further includes a frame 23, which includes two frames and is respectively disposed at both ends of the voice coil 22 along the first direction. One end of the frame 23 is connected to the voice coil 22, and the other end of the frame 23 is connected to the diaphragm 212. The diaphragm 212 is provided with a second reinforcing rib 214 in the area corresponding to the frame 23. The second reinforcing rib 214 is annular and encloses a connecting area. The frame 23 is connected and fixed to the connecting area.

[0086] In this embodiment, as Figure 4 As shown, by setting an annular second reinforcing rib 214 to enclose and form a connecting area in the area of ​​the vibrating plate 212 corresponding to the frame 23, the frame 23 can be positioned by the second reinforcing rib 214, thereby improving the positioning accuracy of the frame 23 and the vibrating plate 212.

[0087] Optionally, both ends of the first reinforcing rib 213 are connected to the second reinforcing rib 214; or, the first reinforcing rib 213 and the two second reinforcing ribs 214 are spaced apart. It is understood that when there is only one first reinforcing rib 213, its two ends can be connected to the two second reinforcing ribs 214 respectively; or, the two ends of the first reinforcing rib 213 and the two second reinforcing ribs 214 are spaced apart. When there are multiple first reinforcing ribs 213, the ends of the first reinforcing ribs 213 located at both ends near the second reinforcing ribs 214 are connected to the two second reinforcing ribs 214 respectively; or, the first reinforcing ribs 213 located at both ends are spaced apart from the two second reinforcing ribs 214. The specific choice can be made according to actual needs.

[0088] In one embodiment, at least a portion of the second reinforcing rib 214 extends in a direction away from the voice coil 22 along the second direction to form a mounting groove, and the side of the frame 23 closest to the diaphragm 212 is fixed within the mounting groove. Understandably, the mounting groove can store more adhesive, enhancing the connection stability between the diaphragm 212 and the frame 23.

[0089] In one embodiment, the vibration system 2 further includes two conductive supports, each corresponding to a frame 23 distributed at both ends of the voice coil 22; the two frames 23 are connected to the two conductive supports one-to-one. Each conductive support has at least two electrical connection pads, and one of the pads is connected to an external power supply line, while the other pad is connected to a lead of the voice coil 22. Thus, current flows into the voice coil 22 through one conductive support and out through the other, thereby enabling the voice coil 22 to conduct to the external power supply. Optionally, the frame 23 is a one-piece molded structure.

[0090] This embodiment solves the connection problem between the voice coil 22 and the external power supply through the above settings, and also improves the balance of the voice coil 22, thereby reducing the polarization phenomenon of the vibration system 2.

[0091] 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 disposed on one side of the magnetic yoke 32. The two magnetic circuit components 31 are respectively located on both sides of the voice coil 22 along a third direction. 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. The third direction is perpendicular to the first direction and the second direction, respectively.

[0092] In this embodiment, as Figures 1 to 3 , Figure 8 As shown, two magnetic circuit components 31 are arranged along a 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 a first direction and has a depth along a second direction, so that the voice coil 22 can vibrate in the second direction within the magnetic gap 33.

[0093] In one embodiment, each magnetic circuit assembly 31 includes a first magnetic plate 311, a first magnet 312, a second magnetic plate 313, and a second magnet 314 stacked sequentially along a second direction. The first magnet 312 and the second magnet 314 of each magnetic circuit assembly 31 are magnetized along the second direction but in opposite directions. The magnetization directions of the two first magnets 312 and the two second magnets 314 that are opposite each other along a third direction are also opposite.

[0094] In this embodiment, as Figures 1 to 3 , Figure 8As shown, the second magnet 314 of each magnetic circuit assembly 31 is connected to one side of the magnetic yoke 32, and the second magnetic plate 313 is sandwiched between the first magnet 312 and the second magnet 314. The first magnet 312 is sandwiched between the first magnetic plate 311 and the second magnetic plate 313. This ensures that the first magnetic plate 311, the first magnet 312, the second magnetic plate 313, and the second magnet 314 of the two magnetic circuit assemblies 31 correspond one-to-one along a third direction and are spaced apart to form a magnetic gap 33.

[0095] Understandably, a first magnetic gap is formed between the two first magnetic plates 311, and the long side 221 of the voice coil 22 on the side closer to the diaphragm 211 is located in the first magnetic gap. A second magnetic gap is formed between the two second magnetic plates 313, and the long side 221 of the voice coil 22 on the side farther 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 a greater driving force.

[0096] In one implementation, such as Figures 1 to 3 As shown, the sound-generating device 100 also includes a housing 1, and the vibration system 2 and the magnetic circuit system 3 are all fixed to the housing 1.

[0097] In this embodiment, the housing 1 includes an annular support, and the diaphragm 211 is attached to the inner peripheral wall 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 by injection molding.

[0098] Understandably, the annular support is placed as an insert within the mold, and then the diaphragm 211 raw material is injected into the mold to form the diaphragm 211. During the injection process, the raw material combines with the annular support, thereby achieving a connection between the two, that is, the diaphragm 211 is bonded to the inner circumferential wall of the annular support. Alternatively, the diaphragm 211 can be integrally formed with the annular support through a hot pressing process.

[0099] In this embodiment, the diaphragm 211 and the ring bracket are integrally formed, which can improve the connection stability between the two. No glue is required between the diaphragm 211 and the ring bracket, thereby meeting the high-level waterproof requirements of electronic devices.

[0100] In one implementation, such as Figures 1 to 3 As shown, the sound-generating device 100 also includes a waterproof sealing ring, which is attached to the outer peripheral wall of the annular bracket. The annular bracket and the waterproof sealing ring are integrally formed.

[0101] Understandably, the waterproof sealing ring can be made of liquid silicone rubber and integrally molded with the annular support using an injection molding process; alternatively, the waterproof sealing ring can be made of solid silicone rubber, AEM rubber, or ACM rubber and integrally molded with the annular support using a hot pressing process. Furthermore, after the waterproof sealing ring and the annular support are integrally molded, the diaphragm 211 is combined with the annular support using a hot pressing process. That is, the diaphragm 211, the annular support, and the waterproof sealing ring form a single molded structure, and the combined annular support has a higher waterproof rating.

[0102] In one implementation, such as Figures 1 to 3 As shown, the housing 1 also includes a bottom shell, which has an annular frame structure and is attached to the side of the annular support facing the magnetic circuit system 3 by adhesive bonding or embedding. The magnetic circuit system 3 and the conductive support are connected inside the bottom shell.

[0103] In this embodiment, the first magnetic conductive plate 311 is integrally injection molded with the bottom shell, and the first magnet 312 and 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 is understood 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 water pressure damage and achieving a high waterproof target.

[0104] In one implementation, such as Figure 1 As shown, the two first magnetic plates 311 of the two magnetic circuit assemblies 31 each have a clearance space at their opposite ends to avoid the first reinforcing rib 213. That is, the distance between the two first magnetic plates 311 is greater than the distance between the two first magnets 312, thus forming a clearance space, thereby reducing interference with the first reinforcing rib 213, thereby increasing the vibration range of the vibrating plate 212 and improving the sound quality of the sound generating device 100.

[0105] Optionally, the two first magnetic plates 311 of the two magnetic circuit components 31 are integrally molded and integrally injection molded with the bottom shell of the housing 1.

[0106] This utility model also proposes an electronic device, which includes the aforementioned sound-generating device 100. The specific structure of the sound-generating device 100 is as described in the foregoing embodiments. Since this electronic device adopts all the technical solutions of all the foregoing embodiments, it has at least all the beneficial effects brought about by the technical solutions of the foregoing embodiments, which will not be described in detail here.

[0107] Optionally, the electronic device of this utility model can be a portable mobile electronic product such as a mobile phone or tablet, or a wearable device such as a watch, VR, or AR, etc., without specific limitations.

[0108] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A voice coil, used in a sound-generating device, characterized in that, The voice coil is flat and has a body portion. The body portion includes two long sides extending along a first direction, and the two long sides are spaced apart along a second direction to form a spacer groove. The voice coil also includes a first support portion disposed in the spacer groove, and the first support portion is connected to the two long sides on both sides along the second direction. Wherein, the first direction is perpendicular to the second direction.

2. The voice coil as described in claim 1, characterized in that, The first support portion is formed by the curing of adhesive applied to the spacer groove.

3. The voice coil as described in claim 2, characterized in that, The adhesive is a UV adhesive; And / or, there are multiple first support portions, and the multiple first support portions are distributed at intervals 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 body portion; wherein, the third direction is perpendicular to the first direction and the second direction, respectively.

4. The voice coil as described in claim 1, characterized in that, The extension length of the first support portion along the first direction is defined as L1, and the extension length of the spacer groove along the first direction is defined as L2. Where 0.1 ≤ L1 / L2 < 1; and / or, L1 ≥ 1 mm.

5. The voice coil as described in claim 1, characterized in that, The voice coil also includes a second support portion, which is located on at least one side of the body portion along a third direction, and the second support portion is connected to the two long sides respectively; The third direction is perpendicular to both the first direction and the second direction.

6. The voice coil as described in claim 5, characterized in that, The second support part is a metal sheet; And / or, the main body is provided with the second support portion on both sides along the third direction; And / or, there are multiple second support portions, and the multiple second support portions are distributed at intervals along the first direction; And / or, define the extension length of the second support portion along the first direction as L3, and define the extension length of the spacer groove along the first direction as L2; ​​wherein, 0.1≤L3 / L2<1; And / or, define the extension length of the second support portion along the first direction as L3; wherein, L3≥1mm.

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

8. The sound-generating device as claimed in claim 7, characterized in that, The diaphragm assembly includes a diaphragm and a vibrating plate connected to the diaphragm. Along the second direction, the vibrating plate is provided with a first reinforcing rib extending recessed toward the 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 as described in claim 8, characterized in that, The vibration system further includes a frame, which comprises two frames respectively disposed 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 diaphragm. The diaphragm is provided with a second reinforcing rib in the area corresponding to the frame. The second reinforcing rib is annular and encloses a connecting area, and the skeleton is fixedly connected to the connecting area.

10. The sound-generating device as claimed in claim 9, characterized in that, Along the second direction, at least a portion of the second reinforcing rib extends protruding away from the voice coil to form a mounting groove, and the side of the frame near the diaphragm is fixed in the mounting groove.

11. The sound-generating device as claimed in claim 7, characterized in that, The sound-generating device further includes a magnetic circuit system, which includes a magnetic yoke and two magnetic circuit components disposed on one side of the magnetic yoke. The two magnetic circuit components are respectively located on both sides of the voice coil along a third direction. The two magnetic circuit components are spaced apart to form a magnetic gap. The side of the voice coil away from the diaphragm assembly is inserted into the magnetic gap. The third direction is perpendicular to the first direction and the second direction, respectively. Each of the magnetic circuit components includes a first magnetic guide plate, a first magnet, a second magnetic guide plate, and a second magnet stacked sequentially along the second direction. The first magnet and the second magnet of each magnetic circuit component are magnetized along the second direction but in opposite directions. The magnetization directions of two first magnets and two second magnets opposite each other along the third direction are also opposite.

12. An electronic device, characterized in that, The electronic device includes a sound-generating device as described in any one of claims 7 to 11.

Images