Sound-generating devices and electronic equipment

Abstract

The present invention discloses a sound-generating device and electronic device. The sound-generating device includes a housing, a vibration system, and a magnetic circuit system. The vibration system includes a diaphragm assembly and a voice coil. The magnetic circuit system is disposed in the housing. The magnetic circuit system includes a central magnetic portion and a side magnetic portion. The central magnetic portion and the side magnetic portion are spaced apart to define a first magnetic gap. The other end of the voice coil is inserted into the first magnetic gap. The side magnetic portion includes a side magnet and a side washer disposed on the side of the side magnet near the diaphragm assembly. The central magnetic portion includes a center magnet and a center washer disposed on the side of the center magnet near the diaphragm assembly. The side washers are formed into a closed ring shape. Along the circumferential direction of the central magnetic portion, the spacing between the side washers is equal. According to the sound-generating device of the present invention, along the circumferential direction of the central magnetic portion, the spacing between the side washers is equal, thereby increasing the BL value of the vibration system and effectively improving the sound sensitivity of the sound-generating device.

Description

Technical Field

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

[0002] A speaker is a transducer device that converts electrical signals into sound signals and is now widely used in electronic devices such as mobile phones and computers. With the improvement of user demand, speakers are increasingly focusing on pursuing high loudness, low distortion and other performance. In related technologies, the magnetic circuit system of a speaker unit includes a central magnetic circuit part and a side magnetic circuit part. The central magnetic circuit part and the side magnetic circuit part are spaced apart to form a magnetic gap. Avoidance holes need to be set at the four corners of the side magnetic circuit part to form sound holes facing the diaphragm, thereby meeting the requirements of the speaker unit to emit sound from the four corners. However, the above setting will reduce the magnetic field strength B value of the magnetic gap of the magnetic circuit system, thereby reducing the sound sensitivity and loudness of the speaker unit, making it difficult to meet the user's demand. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a sound-generating device having the advantages of high sound sensitivity and good acoustic performance.

[0004] The present invention also provides an electronic device having the sound-generating device.

[0005] According to an embodiment of the first aspect of the present invention, the sound-producing device includes: a shell, a vibration system, the vibration system includes a diaphragm assembly and a voice coil, the outer periphery of the diaphragm assembly is fixed to the shell, and one end of the voice coil is connected to the diaphragm assembly; a magnetic circuit system, the magnetic circuit system is arranged in the shell, the magnetic circuit system includes a central magnetic part and a side magnetic part, the central magnetic part and the side magnetic part are spaced apart to define a first magnetic gap, the other end of the voice coil is inserted into the first magnetic gap, the side magnetic part includes a side magnet and a side washer provided on the side of the side magnet close to the diaphragm assembly, the central magnetic part includes a center magnet and a center washer provided on the side of the center magnet close to the diaphragm assembly; wherein the side washer is formed in a closed ring shape, and the spacing between the side washers and the center washers is equal along the circumferential direction of the central magnetic part.

[0006] According to the sound-emitting device of the first aspect of the present invention, the side washers are arranged into a closed ring structure, and the distance between the side washers and the center washers is kept equal along the circumferential direction of the central magnetic part, thereby increasing the BL value of the vibration system, effectively improving the sound sensitivity of the sound-emitting device, and improving the sound effect of the sound-emitting device.

[0007] According to some embodiments of the present invention, the sound-emitting device is formed into a square structure, and the edge washer is provided with a sound hole at a position corresponding to the corner of the sound-emitting device. The sound hole is spaced apart from the first magnetic gap, and along the vibration direction of the vibration system, the sound hole is arranged directly opposite to the diaphragm assembly.

[0008] According to some embodiments of the present invention, the side washer includes a first connecting edge and a second connecting edge connected end to end, and the connection between the first connecting edge and the second connecting edge forms a first corner. The center washer includes a third connecting edge and a fourth connecting edge connected end to end, and the connection between the third connecting edge and the fourth connecting edge forms a second corner. The first connecting edge is arranged on the outside of the third connecting edge and is spaced apart to form a first gap. The second connecting edge is arranged on the outside of the fourth connecting edge and is spaced apart to form a second gap. The first corner is arranged on the outside of the second corner and is spaced apart to form a third gap. The widths of the first gap, the second gap and the third gap are the same.

[0009] According to some embodiments of the present invention, the shell is formed in a closed ring shape and is disposed on the outside of the side washer, and the shell and the side washer are integrally injection molded.

[0010] According to some embodiments of the present invention, the central magnetic portion is provided with a second magnetic gap, and the voice coil includes a first sub-voice coil inserted in the first magnetic gap and a second sub-voice coil inserted in the second magnetic gap, the first sub-voice coil is arranged on the periphery of the second sub-voice coil, and the two oppositely arranged sides of the second sub-voice coil are respectively fixed on the opposite sides of the first sub-voice coil.

[0011] In some embodiments of the present invention, the first sub-voice coil has a first side and a second side connected end to end, and the second sub-voice coil specifically has a third side and a fourth side connected end to end, one of the first side and the second side is formed as a fixed side, one of the third side and the fourth side is formed as a supporting side, and two oppositely arranged supporting sides are respectively fixed to the two oppositely arranged fixed sides.

[0012] In some embodiments of the present invention, the first sub-voice coil is formed into a square structure, the length of the first side is greater than the length of the second side, and the first side is formed as the fixed side.

[0013] In some embodiments of the present invention, the second sub-voice coil is formed into a square structure, the length of the third side is greater than the length of the fourth side, and the fourth side is formed as the supporting side.

[0014] In some embodiments of the present invention, the first sub-voice coil is formed into a square structure, and the two supporting edges are respectively fixed at the middle positions of the two oppositely arranged fixed edges; and / or the outer peripheral wall of the supporting edge is fitly connected to the inner peripheral wall of the fixed edge.

[0015] In some embodiments of the present invention, the fourth edge and the third edge are located in a plane perpendicular to the vibration direction of the vibration system, and the central magnetic part includes a first magnetic part, a second magnetic part and a third magnetic part that are arranged at intervals, and the first magnetic part and the third magnetic part are respectively spaced from the second magnetic part to form the second magnetic gap.

[0016] In some embodiments of the present invention, the fourth edge and the third edge are located in a plane parallel to the vibration direction of the vibration system, and the central magnetic portion includes a first magnetic portion and a second magnetic portion arranged at intervals, and the first magnetic portion and the second magnetic portion are spaced apart to form the second magnetic gap.

[0017] According to some embodiments of the present invention, the diaphragm assembly includes a dome and a conductive diaphragm, the top of the voice coil is connected to the dome, the dome is provided with a through hole, and the lead portion of the voice coil passes through the through hole to be electrically connected to the conductive diaphragm.

[0018] According to some embodiments of the present invention, the diaphragm assembly includes a dome and a conductive diaphragm, the top of the voice coil is connected to the dome, the dome is provided with a pad portion, and the lead portion of the voice coil is electrically connected to the conductive diaphragm through the pad portion.

[0019] An electronic device according to an embodiment of the second aspect of the present invention includes the sound-generating device according to the above embodiment of the present invention.

[0020] According to the electronic device of the embodiment of the present invention, by providing the above-mentioned sound-generating device, the sound-generating device has a reasonable structural design and high sound sensitivity, thereby improving the sound quality of the electronic device and enhancing the market competitiveness of the electronic device.

[0021] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0023] Figure 1 is a schematic diagram of the explosion structure of a sound-generating device according to one embodiment of the present invention;

[0024] Figure 2 is a vertical cross-sectional view of a sound-generating device according to one embodiment of the present invention;

[0025] Figure 3 is a vertical cross-sectional view of a sound-generating device according to another embodiment of the present invention;

[0026] Figure 4 is a partial cross-sectional view of a sound-generating device according to one embodiment of the present invention;

[0027] Figure 5 is a schematic diagram of a partial structure of a sound-generating device according to an embodiment of the present invention;

[0028] Figure 6 is a schematic structural diagram of a dome according to an embodiment of the present invention;

[0029] Figure 7 is a schematic structural diagram of a dome according to another embodiment of the present invention;

[0030] Figure 8 is a structural schematic diagram of a dome according to another embodiment of the present invention;

[0031] Figure 9 FIG. 4 is a schematic structural diagram of a dome according to another embodiment of the present invention.

[0032] Reference numerals:

[0033] Sound-generating device 100,

[0034] Shell 1,

[0035] Vibration system 2, diaphragm assembly 21, diaphragm 211, center portion 2111, rim portion 2112, horizontal extension portion 2113, bend portion 2114, dome 212, first through hole 212a, second through hole 212b, third through hole 212c, fourth through hole 212d, fifth through hole 212e, sixth through hole 212f, first solder pad 212g, second solder pad 212h, third solder pad 212i, fourth solder pad 212j, fifth solder pad 212k, sixth solder pad 212l, first sub-voice coil 22, first side 221, second side 222, second sub-voice coil 23, third side 231, fourth side 232,

[0036] Magnetic circuit system 3, central magnetic part 31, first magnetic part 31a, second magnetic part 31b, third magnetic part 31c, central magnet 311, first magnet 311a, second magnet 311b, third magnet 311c, central washer 312, first washer 312a, second washer 312b, third washer 312c, third connecting edge 3121, fourth connecting edge 3122, second corner 3123, side magnetic part 32, side magnet 321, side washer 322, first connecting edge 3221, second connecting edge 3222, first corner 3223, sound hole 322a, first magnetic gap 3a, second magnetic gap 3b. DETAILED DESCRIPTION

[0037] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar components or components having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and are not to be construed as limiting the present invention.

[0038] Reference below Figures 1-9 The sound-generating device 100 according to the first embodiment of the present invention is described in detail. The sound-generating device 100 may be a speaker unit.

[0039] like Figures 1-4 As shown, the sound-generating device 100 according to the first embodiment of the present invention includes: a shell 1, a vibration system 2 and a magnetic circuit system 3.

[0040] The vibration system 2 may include a diaphragm assembly 21 and a voice coil (eg Figure 1-Figure 3 The outer periphery of the diaphragm assembly 21 is fixed to the housing 1, and one end of the voice coil can be connected to the diaphragm assembly 21. The magnetic circuit system 3 is provided in the housing 1, and the magnetic circuit system 3 can include a central magnetic portion 31 and a side magnetic portion 32. The central magnetic portion 31 and the side magnetic portion 32 are spaced apart to define a first magnetic gap 3a. The other end of the voice coil can be inserted into the first magnetic gap 3a. The side magnetic portion 32 includes a side magnet 321 and a side magnet 321 provided on the side of the diaphragm assembly 21 (as shown in FIG. Figure 2-Figure 3 The side washer 322 of the central magnetic portion 31 includes a central magnet 311 and a central magnet 311 located on the side of the diaphragm assembly 21 (as shown in FIG. Figure 2-Figure 3 The center washer 312 of the upper side shown in FIG. Figure 5 As shown, the side washer 322 is formed in a closed ring shape, and along the circumferential direction of the central magnetic portion 31 , the distance between the side washer 322 and the central washer 312 is equal.

[0041] Specifically, the side magnets 32 of the magnetic circuit system 3 can be disposed on the outer periphery of the central magnet 31 and spaced apart to form a first magnetic gap 3a. One end of the voice coil is connected to the diaphragm assembly 21, while the other end of the voice coil is inserted into the first magnetic gap 3a. When the sound-generating device 100 is in operation, a current flows through the voice coil, and the force exerted on the voice coil in the magnetic field is BIL, where B is the magnetic field strength, I is the current magnitude, and L is the length of the voice coil lead. As a result, the voice coil vibrates back and forth under the action of the magnetic field force, driving the diaphragm 211 to vibrate synchronously and produce sound. The side washers 322 on the side magnets 32 are formed into a closed annular structure. Specifically, the side washers 322 are disposed around the outer periphery of the central magnet 31, with a first magnetic gap 3a defined between the side washers 322 and the center washers 312 on the central magnet 31. The spacing between the side washers 322 and the center washers 312 remains constant along the circumference of the central magnet 31. That is, a first magnetic gap 3 a extending along the circumferential direction of the central magnetic portion 31 and having the same width is formed between the side washers 322 and the central washers 312 .

[0042] It can be understood that since the first magnetic gap 3a maintains a constant width along its circumferential direction, compared to the traditional magnetic circuit system 3, in order to form the sound hole 322a, it is necessary to set avoidance holes at the four corners of the magnetic circuit system 3, that is, the width of the magnetic gap at the four corners of the magnetic circuit system 3 is much larger than the magnetic gap at the multiple edge positions of the magnetic circuit system 3. Therefore, the magnetic field intensity within the magnetic gap at the four corners of the traditional magnetic circuit system 3 is much smaller than the magnetic field intensity within the magnetic gap at its multiple edge positions. Through comparative analysis, it can be seen that the present invention can greatly improve the BL value of the vibration system 2 by setting the first magnetic gap 3a to maintain a constant width along its circumferential direction, thereby effectively improving the sound sensitivity of the sound-generating device 100 and improving its sound effect.

[0043] According to the sound-emitting device 100 of the first aspect of the present invention, by setting the side washer 322 into a closed ring structure, and keeping the distance between the side washer 322 and the center washer 312 equal along the circumferential direction of the central magnetic part 31, the BL value of the vibration system 2 can be increased, and the sound sensitivity of the sound-emitting device 100 can be effectively improved, thereby improving the sound effect of the sound-emitting device 100.

[0044] According to some embodiments of the present invention, the sound-producing device 100 may be formed into a square structure, and the side washers 322 are provided with sound holes 322a at positions corresponding to the corners of the sound-producing device 100. The sound holes 322a are spaced apart from the first magnetic gap 3a. Along the vibration direction of the vibration system 2, the sound holes 322a are arranged directly opposite the diaphragm assembly 21. Thus, through the above arrangement, by providing the sound holes 322a at the corners of the side washers 322 and spacing the side washers 322 from the first magnetic gap 3a, it is possible to ensure that the width of the first magnetic gap 3a at the four corners of the sound-producing device 100 is the same as the width of the first magnetic gap 3a at the sides of the sound-producing device 100.

[0045] like Figure 5 As shown, according to some embodiments of the present invention, the edge washer 322 may include a first connecting edge 3221 and a second connecting edge 3222 connected end to end, and the connection between the first connecting edge 3221 and the second connecting edge 3222 forms a first corner 3223, and the center washer 312 may include a third connecting edge 3121 and a fourth connecting edge 3122 connected end to end, and the connection between the third connecting edge 3121 and the fourth connecting edge 3122 forms a second corner 3123, the first connecting edge 3221 is arranged on the outside of the third connecting edge 3121 and is spaced to form a first gap, the second connecting edge 3222 is arranged on the outside of the fourth connecting edge 3122 and is spaced to form a second gap, the first corner 3223 is arranged on the outside of the second corner 3123 and is spaced to form a third gap, and the widths of the first gap, the second gap and the third gap are the same, thereby forming a first magnetic gap 3a whose width remains unchanged along its circumferential direction, thereby improving the BL value of the vibration system 2, and thus improving the sound sensitivity of the sound-emitting device 100.

[0046] For example, in Figure 5In the specific example shown, the sound-emitting device 100 is formed into a rectangular parallelepiped structure. The side washer 322 includes a first connecting edge 3221 and a second connecting edge 3222 connected end to end. The first connecting edge 3221 and the second connecting edge 3222 are perpendicular to each other, and the junction between the first connecting edge 3221 and the second connecting edge 3222 forms a first corner 3223. The center washer 312 is also formed into a rectangular parallelepiped plate-like closed ring structure. The center washer 312 includes a third connecting edge 3121 and a fourth connecting edge 3122 connected end to end. The third connecting edge 3121 and the fourth connecting edge 3122 are perpendicular to each other. The junction between the third connecting edge 3121 and the fourth connecting edge 3122 forms a second corner 3123. The first corner 3223 and the second corner 3123 are arranged correspondingly. Among them, the first connecting edge 3221 is arranged on the outside of the third connecting edge 3121 and is spaced apart to form a first gap, the second connecting edge 3222 is arranged on the outside of the fourth connecting edge 3122 and is spaced apart to form a second gap, the first corner 3223 is arranged on the outside of the second corner 3123 and is spaced apart to form a third gap, the widths of the first gap, the second gap and the third gap are all the same, the first gap, the second gap and the third gap together form a closed ring shape and a first magnetic gap 3a with consistent width, each first corner 3223 is provided with a sound hole 322a, each sound hole 322a is arranged at the center of the four corners of the edge washer 322, and each sound hole 322a is spaced apart from the first magnetic gap 3a.

[0047] like Figure 1-Figure 3 As shown, according to some embodiments of the present invention, the housing 1 can be formed into a closed ring shape and disposed outside the side washer 322. The housing 1 and the side washer 322 are integrally injection-molded. This simplifies the assembly process between the housing 1 and the magnetic circuit system 3 and improves assembly efficiency. Of course, it is understood that the connection method between the housing 1 and the side washer 322 is not limited to this. For example, the housing 1 can also be secured to the side washer 322 via adhesive bonding.

[0048] exist Figure 2-Figure 3In the specific example shown, the diaphragm assembly 21 includes a diaphragm 211 and a dome 212 disposed on the diaphragm 211. The diaphragm 211 includes a central portion 2111 connected to the dome 212, a folded ring portion 2112 disposed on the periphery of the central portion 2111, and a fixed portion disposed on the periphery of the folded ring portion 2112. The folded ring portion 2112 is recessed toward the magnetic circuit system 3 and faces the sound hole 322a, thereby reducing the Z-direction height of the sound-generating device 100. The fixed portion includes a horizontal extension portion 2113 and a bent portion 2114 that bends downward relative to the horizontal extension portion 2113. The horizontal extension portion 2113 is fixedly connected to the top of the housing 1, and the bent portion 2114 is connected to the sidewall of the housing 1. This increases the connection area between the diaphragm 211 and the housing 1, improves the sealing performance of the sound-generating device 100, and thereby improves the product waterproof rating of the sound-generating device 100. Furthermore, the housing 1 is formed as a plastic material piece, and the diaphragm 211 can be formed as an integral injection-molded piece with the housing 1 .

[0049] like Figure 1 and Figure 5 As shown, according to some embodiments of the present invention, the central magnetic portion 31 may be provided with a second magnetic gap 3b. The voice coil may include a first sub-voice coil 22 inserted into the first magnetic gap 3a and a second sub-voice coil 23 inserted into the second magnetic gap 3b. The first sub-voice coil 22 is disposed on the outer periphery of the second sub-voice coil 23, and the two oppositely disposed sides of the second sub-voice coil 23 may be fixed to opposite sides of the first sub-voice coil 22. Thus, with this arrangement, the first sub-voice coil 22 is inserted into the first magnetic gap 3a, and the second sub-voice coil 23 is inserted into the second magnetic gap 3b. This increases the driving force of the voice coils on the diaphragm assembly 21, thereby improving the sound sensitivity of the sound-generating device 100. Furthermore, because the two oppositely disposed sides of the second sub-voice coil 23 are fixed to opposite sides of the first sub-voice coil 22, the second sub-voice coil 23 provides excellent support for the first sub-voice coil 22. It is understood that when the first sub-voice coil 22 has a larger outer dimension, the resonant area of ​​the dome 212 is larger when the vibration system 2 vibrates, affecting the sound quality of the sound-generating device 100. With the above arrangement, the second sub-voice coil 23 can support the first sub-voice coil 22, thereby enhancing the support provided by the voice coil to the dome 212 and reducing the resonant area of ​​the dome 212. This significantly extends the high-frequency range and greatly enhances the sound quality of the sound-generating device 100.

[0050] In some embodiments of the present invention, the first sub-voice coil 22 has a first side 221 and a second side 222 connected end to end, and the second sub-voice coil 23 specifically has a third side 231 and a fourth side 232 connected end to end. One of the first side 221 and the second side 222 can be formed as a fixed side, and one of the third side 231 and the fourth side 232 can be formed as a supporting side. The two oppositely arranged supporting sides are respectively fixed to the two oppositely arranged fixed sides.

[0051] Specifically, the first side 221 can be set as a fixed side, or the second side 222 can be set as a fixed side; the third side 231 can be set as a supporting side, or the fourth side 232 can be set as a supporting side. That is, the two opposing fourth sides 232 of the second sub-voice coil 23 can be fixed to either the two opposing first sides 221 of the first sub-voice coil 22 or the two opposing second sides 222 of the first sub-voice coil 22. The two opposing third sides 232 of the second sub-voice coil 23 can be fixed to either the two opposing first sides 221 of the first sub-voice coil 22 or the two opposing second sides 222 of the first sub-voice coil 22. It is understood that when the first side 221 and the second side 222 are larger, the voice coil's support for the dome 212 is less effective. When the vibration system 2 is operating, the resonant area of ​​the dome 212 is larger, thereby affecting the sound quality of the sound-generating device 100. Through the above arrangement, the second sub-voice coil 23 can support the first sub-voice coil 22, thereby improving the supporting effect of the voice coil on the dome 212, reducing the resonance area of ​​the dome 212, and significantly expanding the high frequency effect, thereby greatly improving the sound effect of the sound-generating device 100.

[0052] like Figure 5 As shown, in some embodiments of the present invention, the first sub-voice coil 22 can be formed into a square structure, with the length of the first side 221 being greater than the length of the second side 222. The first side 221 can be formed as a fixed side. It is understood that when the length of the first side 221 is larger, the resonant area of ​​the dome 212 is larger when the vibration system 2 vibrates. By fixing the opposite sides of the second sub-voice coil 23 to the first side 221, the support effect of the voice coil on the dome 212 can be enhanced, improving high-frequency ductility and enhancing the sound quality of the sound-generating device 100.

[0053] like Figure 5 As shown, in some embodiments of the present invention, the second voice coil 23 can be formed into a square structure, and the length of the third side 231 can be greater than the length of the fourth side 232. The fourth side 232 can be formed as a supporting side. Thus, through this arrangement, the support effect of the voice coil on the dome 212 can be enhanced, improving high-frequency ductility and enhancing the sound quality of the sound-generating device 100. It should be noted that the longer third side 231 can also be set as a supporting side. The choice of arrangement is based on actual usage requirements and is not specifically limited by the present invention.

[0054] like Figure 5As shown, in some embodiments of the present invention, the first sub-voice coil 22 can be formed into a square structure, with two fixed sides respectively fixed to the middle position of two oppositely arranged supporting sides. This can enhance the support effect of the second sub-voice coil 23 on the first sub-voice coil 22, thereby improving the high-frequency ductility of the dome 212. In another embodiment of the present invention, the outer peripheral wall of the supporting side is closely connected to the inner peripheral wall of the fixed side, thereby making the matching structure between the first sub-voice coil 22 and the second sub-voice coil 23 more compact, thereby improving the vibration effect of the vibration system 2.

[0055] like Figure 5 In a specific example of the present invention, the first sub-voice coil 22 is formed into a square ring structure. The first sub-voice coil 22 includes a first side 221 and a second side 222 connected end to end. The first side 221 is longer than the second side 222 and serves as a fixed side. The second sub-voice coil 23 is also formed into a square ring structure. The second sub-voice coil 23 includes a third side 231 and a fourth side 232 connected end to end. The third side 231 is longer than the fourth side 232 and serves as a supporting side. The two opposing fourth sides 232 of the second sub-voice coil 23 are respectively fixed to the two opposing first sides 221 of the first sub-voice coil 22. Each fourth side 232 is fixed to the center of the corresponding first side 221 and is aligned with the inner circumferential wall of the corresponding first side 221. Along the vibration direction of the vibration system 2, the first side 221, the second side 222, the third side 231, and the fourth side 232 extend to the same height. Therefore, the second sub-voice coil 23 can be nested in the first sub-voice coil 22 to provide good support for the first sub-voice coil 22, thereby improving the support effect of the first sub-voice coil 22 on the dome 212, greatly improving the high-frequency ductility of the dome 212, and improving the sound effect of the sound-generating device 100.

[0056] like Figure 1 、 Figure 2 and Figure 5As shown, in some embodiments of the present invention, the fourth edge 232 and the third edge 231 can be located in a plane perpendicular to the vibration direction of the vibration system 2, and the central magnetic portion 31 can include a first magnetic portion 31a, a second magnetic portion 31b and a third magnetic portion 31c arranged at intervals, and the first magnetic portion 31a and the third magnetic portion 31c are respectively spaced apart from the second magnetic portion 31b to form a second magnetic gap 3b. Specifically, the vibration system 2 can vibrate in the vertical direction, and the fourth side 232 and the third side 231 can be located in a horizontal plane, that is, the second sub-voice coil 23 is a conventional square voice coil, and the central magnetic part 31 can include three parts, namely the first magnetic part 31a, the second magnetic part 31b and the third magnetic part 31c, which are spaced apart in sequence. The first magnetic part 31a includes a first magnet 311a and a first washer 312a, the second magnetic part 31b includes a second magnet 311b and a second washer 312b, and the third magnetic part 31c includes a third magnet 311c and a third washer 312c. The first magnetic part 31a and the third magnetic part 31c are located on both sides of the second magnetic part 31b and are spaced apart from the second magnetic part 31b to form a second magnetic gap 3b. The first magnetic part 31a and the third magnetic part 31c are spaced apart from the side magnetic part 32 located on its periphery to form a first magnetic gap 3a. Therefore, through the above arrangement, a first magnetic gap 3a corresponding to the first sub-voice coil 22 and a second magnetic gap 3b corresponding to the second sub-voice coil 23 can be formed. The structural design is relatively ingenious and highly feasible.

[0057] like Figure 3 As shown, in some embodiments of the present invention, the fourth side 232 and the third side 231 can be located in a plane parallel to the vibration direction of the vibration system 2. The central magnetic portion 31 can include a first magnetic portion 31a and a second magnetic portion 31b spaced apart from each other, with the first magnetic portion 31a and the second magnetic portion 31b spaced apart to form a second magnetic gap 3b. For example, the vibration system 2 can vibrate vertically, and the fourth side 232 and the third side 231 can be located in a vertical plane. That is, the second sub-voice coil 23 can be formed as a flat voice coil. The third side 231 extends horizontally, and the fourth side 232 extends vertically, so that the second sub-voice coil 23 is vertically inserted into the second magnetic gap 3b. The central magnetic portion 31 can include two parts, namely, a first magnetic portion 31a and a second magnetic portion 31b spaced apart from each other, forming the second magnetic gap 3b. The first magnetic portion 31a and the second magnetic portion 31b are spaced apart from the side magnetic portions 32 located on their periphery to form the first magnetic gap 3a. Thus, through the above arrangement, a first magnetic gap 3a corresponding to the first sub-voice coil 22 and a second magnetic gap 3b corresponding to the second sub-voice coil 23 can be formed, and the structural design is simpler.

[0058] like Figure 6 and Figure 8As shown, according to some embodiments of the present invention, the diaphragm assembly 21 may include a dome 212 and a conductive diaphragm (not shown in the figure), the top of the voice coil is connected to the dome 212, the dome 212 may be provided with a through hole, the lead portion of the voice coil passes through the through hole and is electrically connected to the conductive diaphragm, thereby, the lead portion can be electrically connected to the conductive diaphragm through the through hole, and the conductive diaphragm can be electrically connected to the external circuit, thereby simplifying the internal circuit connection structure of the sound-emitting device 100, making the overall structure of the sound-emitting device 100 more compact; moreover, since the conductive diaphragm vibrates synchronously with the diaphragm assembly 21, the lead portion of the voice coil can be prevented from being broken during the reciprocating vibration of the dome 212.

[0059] exist Figure 6 In a specific example shown, the dome 212 can be formed into a square structure with four through holes (eg Figure 6 The first through hole 212a, the second through hole 212b, the third through hole 212c and the fourth through hole 212d are respectively arranged at the four corners of the dome 212. One lead portion of the voice coil can pass through one of the through holes to be electrically connected to the input pad of the external pad, and the other lead portion of the voice coil can pass through the other through hole to be electrically connected to the output pad of the external pad, thereby realizing the conduction of the internal and external circuits.

[0060] Furthermore, the outer dimensions of the four through-holes are completely identical. It is understandable that, because the outer dimensions of the through-holes are identical and the through-holes are located in a one-to-one correspondence at the corners of the dome 212, two of the through-holes provide a conductive connection, and because the four through-holes are symmetrically located at the four corners of the dome 212, the other two through-holes balance vibrations, preventing polarization due to uneven mass and force in different areas of the diaphragm assembly 21.

[0061] In a specific embodiment of the present invention, the diaphragm assembly 21 further includes a diaphragm 211, a conductive diaphragm, and a dome 212, respectively disposed on the diaphragm 211. The diaphragm 211 has a square body, and four conductive diaphragms (a first conductive diaphragm, a second conductive diaphragm, a third conductive diaphragm, and a fourth conductive diaphragm) are disposed at the four corners of the diaphragm 211. The voice coil includes a first sub-voice coil 22 and a second sub-voice coil 23. The first sub-voice coil 22 includes a first side 221 and a second side 222 connected end to end. The length of the first side 221 is greater than that of the second side 222, and the first side 221 is formed as a fixed side. The second sub-voice coil 23 is also formed into a square ring structure. The second sub-voice coil 23 includes a third side 231 and a fourth side 232 connected end to end. The length of the third side 231 is greater than the length of the fourth side 232. The fourth side 232 is formed as a supporting side. The two oppositely arranged fourth sides 232 of the second sub-voice coil 23 are respectively fixed to the two oppositely arranged first sides 221 of the first sub-voice coil 22, and each fourth side 232 is fixed to the center position of the corresponding first side 221, and each fourth side 232 is arranged to fit the inner circumferential wall of the corresponding first side 221.

[0062] The lead wire portion of the first sub-voice coil 22 includes a first inlet lead wire portion and a first outlet lead wire portion, and the lead wire portion of the second sub-voice coil 23 includes a second inlet lead wire portion and a second outlet lead wire portion. The first sub-voice coil 22 and the second sub-voice coil 23 are connected in series. Figure 8 As shown, the dome 212 is formed into a square structure and has six through-holes (a first through-hole 212a, a second through-hole 212b, a third through-hole 212c, a fourth through-hole 212d, a fifth through-hole 212e, and a sixth through-hole 212f) respectively disposed on the two long axis sides of the dome 212. The first through-hole 212a and the second through-hole 212b are respectively located in the middle of the two long axis sides of the dome 212, while the third through-hole 212c, the fourth through-hole 212d, the fifth through-hole 212e, and the sixth through-hole 212f are respectively disposed at the four corners of the dome 212. The first through hole 212a, the second through hole 212b, the third through hole 212c, and the fourth through hole 212d are used for routing the lead parts, and the fifth through hole 212e and the sixth through hole 212f are symmetrically arranged with the first through hole 212a and the second through hole 212b to balance the vibration and prevent polarization from occurring due to uneven mass and force in different areas of the diaphragm assembly 21.

[0063] One end of the first conductive diaphragm is electrically connected to the input pad of the external solder pad. The first input lead portion can pass through the first through-hole 212a and be electrically connected to the other end of the first conductive diaphragm via conductive adhesive. The first output lead portion passes through the second through-hole 212b and is connected to the conductive adhesive. The second input lead portion passes through the fourth through-hole 212d and is electrically connected to the conductive adhesive, thereby achieving an electrical connection between the first output lead portion and the second input lead portion. Then, the second output lead portion passes through the third through-hole 212c and is electrically connected to one end of the second conductive diaphragm. The other end of the second conductive diaphragm is electrically connected to the output pad of the external solder pad, thereby achieving a series connection between the first sub-voice coil 22 and the second sub-voice coil 23.

[0064] Of course, it is understandable that the first sub-voice coil 22 and the second sub-voice coil 23 can also be connected in parallel. When the first sub-voice coil 22 and the second sub-voice coil 23 are connected in parallel, one end of one of the conductive diaphragms is electrically connected to the input pad of the external solder pad, and the first input lead portion passes through the first through-hole 212a, and the second input lead portion passes through the third through-hole 212c, and both are electrically connected to the other end of the conductive diaphragm via conductive adhesive. One end of the other conductive diaphragm is electrically connected to the output pad of the external solder pad, and the first output lead portion passes through the second through-hole 212b, and the second output lead portion passes through the fourth through-hole 212d, and both are electrically connected to the other end of the conductive diaphragm via conductive adhesive.

[0065] like Figure 7 and Figure 9 As shown, according to some embodiments of the present invention, the diaphragm assembly 21 may include a dome 212 and a conductive diaphragm. The dome 212 is provided with a pad portion, and the lead portion of the voice coil can be electrically connected to the conductive diaphragm through the pad portion. Thus, the lead portion can be electrically connected to the conductive diaphragm through the pad portion on the dome 212, and the conductive diaphragm can be electrically connected to the external circuit, thereby simplifying the internal circuit connection structure of the sound-generating device 100 and making the overall structure of the sound-generating device 100 more compact. Moreover, since the conductive diaphragm and the diaphragm assembly 21 vibrate synchronously, the lead portion of the voice coil can be prevented from breaking during the reciprocating vibration of the dome 212. In addition, the integration of the dome 212 and the pad portion can make the internal structure of the sound-generating device 100 more compact, and the magnetic circuit system 3 does not need to make any avoidance, thereby increasing the BL value of the magnetic field and improving the sound sensitivity of the sound-generating device 100.

[0066] exist Figure 7 In a specific example shown, the ball top 212 can be formed into a square structure, and the pad portion includes four pads (such as Figure 7The first solder pad 212g, the second solder pad 212h, the third solder pad 212i, and the fourth solder pad 212j are shown and are respectively arranged at the four corners of the ball top 212. The second side of one of the solder pads is electrically connected to the input solder pad of the external solder pad through a conductive diaphragm, the first side of the solder pad is electrically connected to the input end of the voice coil, and the output end of the voice coil is connected to the first side of another solder pad, and the second side of the solder pad is electrically connected to the output solder pad of the external solder pad through another conductive diaphragm, thereby realizing conduction between the internal and external circuits.

[0067] It can be understood that since the pad portion includes multiple pads with consistent external dimensions, and the multiple pads are respectively arranged at the corner positions of the spherical top 212, two of the pads realize the function of conductive connection. Since the four pads are symmetrically arranged at the four corners of the spherical top 212, the other two pads play the role of balancing vibration, preventing polarization due to uneven mass and force in different areas of the diaphragm assembly 21.

[0068] In a specific embodiment of the present invention, the diaphragm assembly 21 further includes a diaphragm 211, a conductive diaphragm, and a dome 212, respectively disposed on the diaphragm 211. The diaphragm 211 has a square body, and four conductive diaphragms (a first conductive diaphragm, a second conductive diaphragm, a third conductive diaphragm, and a fourth conductive diaphragm) are disposed at the four corners of the diaphragm 211. The voice coil includes a first sub-voice coil 22 and a second sub-voice coil 23. The first sub-voice coil 22 includes a first side 221 and a second side 222 connected end to end. The length of the first side 221 is greater than that of the second side 222, and the first side 221 is formed as a fixed side. The second sub-voice coil 23 is also formed into a square ring structure. The second sub-voice coil 23 includes a third side 231 and a fourth side 232 connected end to end. The length of the third side 231 is greater than the length of the fourth side 232. The fourth side 232 is formed as a supporting side. The two oppositely arranged fourth sides 232 of the second sub-voice coil 23 are respectively fixed to the two oppositely arranged first sides 221 of the first sub-voice coil 22, and each fourth side 232 is fixed to the center position of the corresponding first side 221, and each fourth side 232 is arranged to fit the inner circumferential wall of the corresponding first side 221.

[0069] The lead wire portion of the first sub-voice coil 22 includes a first inlet lead wire portion and a first outlet lead wire portion, and the lead wire portion of the second sub-voice coil 23 includes a second inlet lead wire portion and a second outlet lead wire portion. The first sub-voice coil 22 and the second sub-voice coil 23 are connected in series. Figure 9As shown, the ball top 212 is formed into a square structure, and the pad portion includes six pads (a first pad 212g, a second pad 212h, a third pad 212i, a fourth pad 212j, a fifth pad 212k, and a sixth pad 212L) and is respectively disposed on the two long axis sides of the ball top 212. Among them, the first pad 212g and the second pad 212h are respectively located in the middle of the two long axis sides of the ball top 212, and the third pad 212i, the fourth pad 212j, the fifth pad 212k, and the sixth pad 212L are respectively disposed at the four corners of the ball top 212. The first solder pad 212g, the second solder pad 212h, the third solder pad 212i, and the fourth solder pad 212j are used to be electrically connected to the lead portion. The fifth solder pad 212k and the sixth solder pad 212L are symmetrically arranged with the first solder pad 212g and the second solder pad 212h to balance the vibration and prevent polarization due to uneven mass and force in different areas of the diaphragm assembly 21.

[0070] Among them, the second side of the first solder pad 212g is electrically connected to the input solder pad of the external solder pad through one of the conductive diaphragms, the first side of the first solder pad 212g is electrically connected to the first input lead portion, the first output lead portion is electrically connected to the first side of the second solder pad 212h, the second side of the second solder pad 212h is electrically connected to the second side of the fourth solder pad 212j through conductive glue, the first side of the fourth solder pad 212j is electrically connected to the second input lead portion, the second output lead portion is electrically connected to the first side of the third solder pad 212i, and the second side of the third solder pad 212i is electrically connected to the output solder pad of the external solder pad through another conductive diaphragm, thereby realizing the series connection of the first sub-voice coil 22 and the second sub-voice coil 23.

[0071] It is understood that the first sub-voice coil 22 and the second sub-voice coil 23 can also be connected in parallel. When the first sub-voice coil 22 and the second sub-voice coil 23 are connected in parallel, the second side of the first pad 212g is electrically connected to the input pad of the external pad via one of the conductive diaphragms. The first input lead portion is electrically connected to the first side of the first pad 212g, the second input lead portion is electrically connected to the first side of the fourth pad 212j, and the second side of the fourth pad 212j is electrically connected to the second side of the first pad 212g via conductive adhesive. The first output lead portion is electrically connected to the first side of the second pad 212h, the second output lead portion is electrically connected to the first side of the third pad 212i, and the second side of the second pad 212h and the second side of the third pad 212i are connected to one end of another of the conductive diaphragms via conductive adhesive. The other end of the conductive diaphragm is electrically connected to the output pad of the external pad.

[0072] It should be noted that the series and parallel connection modes of the first sub-voice coil 22 and the second sub-voice coil 23 are not limited to the above. The above description is only an example and can be flexibly selected according to actual wiring requirements. The present invention does not impose any specific restrictions on this.

[0073] In some embodiments of the present invention, the sound-generating device 100 may further include a centering support connected to the diaphragm assembly 21. The centering support is provided with a conductive pad, to which the lead of the voice coil is electrically connected, and which is in turn electrically connected to an external pad, thereby achieving electrical continuity between the internal and external circuits.

[0074] The electronic device according to the second embodiment of the present invention includes the sound generating device 100 according to the above embodiment of the present invention. Optionally, the electronic device may be a mobile phone, a PAD, a laptop computer, etc.

[0075] The electronic device according to the embodiment of the present invention is provided with the above-mentioned sound-generating device 100. The sound-generating device 100 has a reasonable structural design and high sound sensitivity, thereby improving the sound quality of the electronic device and enhancing the market competitiveness of the electronic device.

[0076] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0077] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0078] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0079] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A sound-generating device, characterized in that: include: case; a vibration system comprising a diaphragm assembly and a voice coil, wherein the outer periphery of the diaphragm assembly is fixed to the housing, and one end of the voice coil is connected to the diaphragm assembly; a magnetic circuit system disposed in the housing, comprising a central magnetic portion and a side magnetic portion, wherein the central magnetic portion and the side magnetic portion are spaced apart to define a first magnetic gap, wherein the other end of the voice coil is inserted into the first magnetic gap, wherein the side magnetic portion comprises a side magnet and a side washer disposed on a side of the side magnet close to the diaphragm assembly, and wherein the central magnetic portion comprises a center magnet and a center washer disposed on a side of the center magnet close to the diaphragm assembly; The side washers are formed in a closed ring shape, and along the circumferential direction of the central magnetic portion, the distances between the side washers and the central washers are equal; The central magnetic portion is provided with a second magnetic gap, and the voice coil includes a first sub-voice coil inserted in the first magnetic gap and a second sub-voice coil inserted in the second magnetic gap, the first sub-voice coil is provided on the outer periphery of the second sub-voice coil, and the two oppositely arranged sides of the second sub-voice coil are respectively fixed to the opposite sides of the first sub-voice coil, the first sub-voice coil has a first side and a second side connected end to end, and the second sub-voice coil specifically has a third side and a fourth side connected end to end, one of the first side and the second side is formed as a fixed side, and one of the third side and the fourth side is formed as a supporting side, and the two oppositely arranged supporting sides are respectively fixed to the two oppositely arranged fixed sides, and the outer peripheral wall of the supporting side is fitly connected to the inner peripheral wall of the fixed side.

2. The sound-generating device according to claim 1, wherein: The sound-generating device is formed into a square structure, and the edge washer is provided with a sound hole at a position corresponding to the corner of the sound-generating device. The sound hole is spaced apart from the first magnetic gap, and along the vibration direction of the vibration system, the sound hole is arranged opposite to the diaphragm assembly.

3. The sound-generating device according to claim 1, wherein: The side washer includes a first connecting edge and a second connecting edge connected end to end, and the connection between the first connecting edge and the second connecting edge forms a first corner. The center washer includes a third connecting edge and a fourth connecting edge connected end to end, and the connection between the third connecting edge and the fourth connecting edge forms a second corner. The first connecting edge is arranged on the outside of the third connecting edge and is spaced apart to form a first gap. The second connecting edge is arranged on the outside of the fourth connecting edge and is spaced apart to form a second gap. The first corner is arranged on the outside of the second corner and is spaced apart to form a third gap. The widths of the first gap, the second gap and the third gap are the same.

4. The sound-generating device according to claim 1, wherein: The shell is formed in a closed ring shape and is arranged on the outer side of the edge washer. The shell and the edge washer are integrally injection-molded.

5. The sound-generating device according to claim 1, characterized in that: The first sub-voice coil is formed in a square structure, the length of the first side is greater than the length of the second side, and the first side is formed as the fixed side.

6. The sound-generating device according to claim 1, wherein: The second sub-voice coil is formed in a square structure, the length of the third side is greater than the length of the fourth side, and the fourth side is formed as the supporting side.

7. The sound-generating device according to claim 1, characterized in that: The first sub-voice coil is formed into a square structure, and the two supporting sides are respectively fixed at the middle positions of the two oppositely arranged fixed sides.

8. The sound-generating device according to claim 1, wherein: The fourth side and the third side are located in a plane perpendicular to the vibration direction of the vibration system, and the central magnetic part includes a first magnetic part, a second magnetic part and a third magnetic part that are arranged at intervals, and the first magnetic part and the third magnetic part are respectively spaced from the second magnetic part to form the second magnetic gap.

9. The sound-generating device according to claim 1, characterized in that: The fourth side and the third side are located in a plane parallel to the vibration direction of the vibration system. The central magnetic portion includes a first magnetic portion and a second magnetic portion that are spaced apart. The first magnetic portion and the second magnetic portion are spaced apart to form the second magnetic gap.

10. The sound-generating device according to any one of claims 1 to 9, characterized in that: The diaphragm assembly includes a dome and a conductive diaphragm. The top of the voice coil is connected to the dome. The dome is provided with a through hole. The lead portion of the voice coil passes through the through hole and is electrically connected to the conductive diaphragm.

11. The sound-generating device according to any one of claims 1 to 9, characterized in that: The diaphragm assembly includes a dome and a conductive diaphragm. The dome is provided with a pad portion, and the lead portion of the voice coil is electrically connected to the conductive diaphragm through the pad portion.

12. An electronic device, characterized in that: Comprising a sound-generating device according to any one of claims 1-11.

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