Sound production device and electronic device

Abstract

The application discloses a sound production device and electronic equipment, the sound production device comprises a shell, a magnetic circuit system and a vibration system. The magnetic circuit system comprises a center magnetic part and a side magnetic part, the first magnetic gap is defined by the interval between the center magnetic part and the side magnetic part, and the center magnetic part is provided with a second magnetic gap. The vibration system comprises a voice coil assembly, the voice coil assembly comprises a first voice coil and a second voice coil, the first voice coil is arranged on the outer periphery of the second voice coil, one end of the first voice coil is inserted into the first magnetic gap, and one end of the second voice coil is inserted into the second magnetic gap. The opposite two sides of the second voice coil are respectively fixed to the opposite two sides of the first voice coil. According to the sound production device, the opposite two sides of the second voice coil are respectively fixed to the opposite two sides of the first voice coil, so that the support effect of the voice coil assembly on the diaphragm assembly is improved, the resonance area of the diaphragm assembly is reduced, the high frequency widening of the sound production device is obvious, and the high frequency sound production effect of the sound production device is improved.

Description

Technical Field

[0001] This invention relates to the field of electroacoustic equipment, and in particular to a sound-generating device and electronic equipment. Background Technology

[0002] With the rapid development of electronic devices, people are using mobile phones and other electronic devices more and more, and their requirements for the acoustic performance of electronic devices are also getting higher and higher.

[0003] In related technologies, a single voice coil is typically connected to a diaphragm assembly to drive the diaphragm assembly to produce sound. However, the support effect of a single voice coil on the diaphragm assembly is limited. Especially when the voice coil is large, the resonant area generated by the diaphragm assembly is large, resulting in poor high-frequency extension of the sound-producing device, which makes it difficult to meet users' needs for a better acoustic experience. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a sound-generating device, which has the advantages of small resonant area and good high-frequency sound generation effect.

[0005] The present invention also proposes an electronic device having the above-described sound-generating device.

[0006] According to a first aspect of the present invention, a sound-generating device includes: a housing; a magnetic circuit system disposed on the housing, the magnetic circuit system including a central magnetic portion and a side magnetic portion, the central magnetic portion and the side magnetic portion being spaced apart to define a first magnetic gap, the central magnetic portion having a second magnetic gap, and the first magnetic gap surrounding the outer periphery of the second magnetic gap; and a vibration system including a voice coil assembly, the voice coil assembly including a first voice coil and a second voice coil, the first voice coil being disposed on the outer periphery of the second voice coil, one end of the first voice coil being inserted into the first magnetic gap, and one end of the second voice coil being inserted into the second magnetic gap; wherein, the two oppositely disposed sides of the second voice coil are respectively fixed to the opposite sides of the first voice coil.

[0007] According to a first aspect embodiment of the sound-generating device, a first voice coil and a second voice coil are provided, with the first voice coil disposed on the outer periphery of the second voice coil. The two sides of the relatively positioned second voice coil are respectively fixed to the opposite sides of the first voice coil. This allows the second voice coil to support the first voice coil, making the dual-voice-coil structure more stable. Consequently, the dual voice coils provide better support for the diaphragm assembly of the sound-generating device, thereby reducing the resonant area of ​​the diaphragm assembly, significantly broadening the high-frequency response of the sound-generating device, and improving the high-frequency sound generation effect.

[0008] According to some embodiments of the present invention, the first voice coil has a first side and a second side connected end to end, the second voice coil 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 the two oppositely arranged supporting sides are respectively fixed to the two oppositely arranged fixed sides.

[0009] According to some embodiments of the present invention, the first 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 into the fixed side.

[0010] According to some embodiments of the present invention, the second 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 support side.

[0011] According to some embodiments of the present invention, the first voice coil is formed into a square structure, and the two supporting sides are respectively fixed at the middle position of the two oppositely arranged fixed sides.

[0012] According to some embodiments of the present invention, the outer peripheral wall of the supporting edge is fitted and connected to the inner peripheral wall of the fixed edge.

[0013] In some embodiments of the present invention, the supporting edge and the fixed edge have the same extension length along the vibration direction of the vibration system.

[0014] According to some embodiments of the present invention, the fourth side and the third side are located in a plane perpendicular to the vibration direction of the vibration system; or, the fourth side and the third side are located in a plane parallel to the vibration direction of the vibration system.

[0015] In some embodiments of the present invention, 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 arranged at intervals, wherein the first magnetic part and the third magnetic part are respectively spaced apart from the second magnetic part to form the second magnetic gap.

[0016] In some embodiments of the present invention, the fourth side and the third side are located in a plane parallel to the vibration direction of the vibration system, and the central magnetic part includes a first magnetic part and a second magnetic part that are spaced apart, with the first magnetic part and the second magnetic part spaced apart to form the second magnetic gap.

[0017] According to some embodiments of the present invention, there are multiple second voice coils, which are spaced apart along the length direction of the fixed side, and the central magnetic part is provided with multiple second magnetic gaps corresponding one-to-one with the multiple second voice coils.

[0018] According to some embodiments of the present invention, the first voice coil and the second voice coil are integrally wound; or, the first voice coil and the second voice coil are formed as separate parts, and the first voice coil and the second voice coil are glued together.

[0019] According to some embodiments of the present invention, the vibration system further includes a diaphragm assembly, wherein the end of the voice coil assembly away from the magnetic circuit system is connected to the diaphragm assembly, wherein the diaphragm assembly includes a conductive diaphragm, and the voice coil assembly is electrically connected to the conductive diaphragm; or, the sound-generating device further includes a centering support, wherein the centering support is disposed between the voice coil assembly and the diaphragm assembly, and the centering support has a first pad and a second pad electrically connected to the first voice coil, and a third pad and a fourth pad electrically connected to the second voice coil.

[0020] An electronic device according to a second aspect of the present invention includes a sound-generating device according to the above-described embodiments of the present invention.

[0021] According to an embodiment of the present invention, the electronic device, by providing the above-mentioned sound-generating device, has a second voice coil that supports the first voice coil, and the resonant area of ​​the diaphragm assembly is small, which significantly broadens the high-frequency response of the electronic device and greatly improves the sound quality of the electronic device.

[0022] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0024] Figure 1 This is a top view of a sound-generating device according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the exploded structure of a sound-generating device according to an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of a dual voice coil structure of a sound-generating device according to an embodiment of the present invention;

[0027] Figure 4 This is a vertical cross-sectional view of a sound-generating device according to an embodiment of the present invention;

[0028] Figure 5 This is a vertical cross-sectional view of a sound-generating device according to another embodiment of the present invention;

[0029] Figure 6 This is a vertical cross-sectional view of a sound-generating device according to another embodiment of the present invention from another angle;

[0030] Figure 7 This is an exploded structural diagram of a diaphragm assembly according to an embodiment of the present invention.

[0031] Figure label:

[0032] Sound-generating device 100;

[0033] Casing 1;

[0034] Magnetic circuit system 2, central magnetic part 21, side magnetic part 22, first magnetic part 211, second magnetic part 212, third magnetic part 213, first magnetic gap 23, second magnetic gap 24, magnetic yoke 25, first central magnet 2111, first central washer 2112, second central magnet 2121, second central washer 2122, third central magnet 2131, third central washer 2132, side magnet 221, side washer 222;

[0035] Vibration system 3, first voice coil 31, second voice coil 32, first side 311, second side 312, third side 321, fourth side 322, diaphragm assembly 33, diaphragm 331, dome 332, connecting hole 3321. Detailed Implementation

[0036] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0037] The following is for reference. Figures 1-7 A sound-generating device 100 according to a first aspect embodiment of the present invention will be described in detail. The sound-generating device 100 may be a speaker unit.

[0038] like Figures 1-7 As shown, the sound-generating device 100 according to a first aspect embodiment of the present invention includes: a housing 1, a magnetic circuit system 2, and a vibration system 3.

[0039] The shape of the shell 1 can be flexibly designed according to the actual situation. Specifically, in such cases... Figure 1 In the illustrated embodiment, the housing 1 may have a first direction that is perpendicular to each other (e.g., Figure 1 (as shown in the x-direction) and the second direction ... Figure 1(as shown in the y-direction). For example, the housing 1 can be formed as a cuboid structure, where the first direction can be the length direction of the cuboid and the second direction can be the width direction of the cuboid. In this embodiment, the housing 1 can be a rectangular ring frame with open ends, and the magnetic circuit system 2 and the vibration system 3 are arranged opposite to each other on both sides of the housing 1 and together enclose the internal installation space.

[0040] like Figures 2-3 As shown, the magnetic circuit system 2 can be fixed to the housing 1. Specifically, the magnetic circuit system 2 can also include a magnetic yoke 25, which can cover one end of the housing 1 and be fixedly connected to the housing 1. The magnetic circuit system 2 can include a central magnetic part 21 and a side magnetic part 22. The central magnetic part 21 and the side magnetic part 22 are fixed to the side of the magnetic yoke 25 facing the internal space formed by the housing 1. The side magnetic parts 22 can be spaced around the central magnetic part 21. A first magnetic gap 23 is defined between the central magnetic part 21 and the side magnetic parts 22, and the central magnetic part 21 itself defines a second magnetic gap 24. Optionally, the central magnetic part 21 can be composed of multiple structural components, and the second magnetic gap 24 is defined by the spaced arrangement of the structural components of the central magnetic part 21. The first magnetic gap 23 is arranged around the outer periphery of the second magnetic gap 24, that is, in the direction perpendicular to the thickness of the sound-generating device 100 (e.g., ...). Figure 1 On the horizontal plane (perpendicular to the planes containing x and y), the projection of the second magnetic gap 24 is located inside the projection of the first magnetic gap 23, and the projection of the first magnetic gap 23 surrounds the outer periphery of the projection of the second magnetic gap 24.

[0041] like Figures 2-3 As shown, the vibration system 3 includes a voice coil assembly, which is disposed within the internal space formed by the housing 1, the magnetic circuit system 2, and the vibration system 3. The voice coil assembly includes a first voice coil 31 and a second voice coil 32. The first voice coil 31 is disposed on the outer periphery of the second voice coil 32. The first voice coil 31 is correspondingly disposed with respect to the first magnetic gap 23, and the second voice coil 32 is correspondingly disposed with respect to the second magnetic gap 24. One end of the first voice coil 31 is inserted into the first magnetic gap 23, and the other end of the second voice coil 32 is inserted into the second magnetic gap 24. Thus, when the sound-generating device 100 is working, the first voice coil 31 and the second voice coil 32 can reciprocate under the interaction of the magnetic circuit system 2.

[0042] In this embodiment, the two opposite sides of the second voice coil 32 are fixed to the opposite sides of the first voice coil 31. Specifically, the first voice coil 31 is disposed on the outer periphery of the second voice coil 32, that is, the second voice coil 32 is fixedly disposed on the inner side of the first voice coil 31, and the two opposite sides of the second voice coil 32 are fixed to the opposite sides of the first voice coil 31. The second voice coil 32 can provide good support for the first voice coil 31. It can be understood that when the first voice coil 31 has a large external size, the resonant area of ​​the dome 332 is large when the vibration system 3 vibrates, which affects the sound production effect of the sound-generating device 100. By supporting the first voice coil 31 with the second voice coil 32, the support effect of the voice coil assembly on the dome 332 can be improved. According to the first aspect embodiment of the sound-generating device 100 of the present invention, by providing a first voice coil 31 and a second voice coil 32, the first voice coil 31 is disposed on the outer periphery of the second voice coil 32. The two opposite sides of the second voice coil 32 are fixed to the opposite sides of the first voice coil 31. This configuration allows the second voice coil 32 to support the first voice coil 31, making the dual voice coil structure more stable and increasing the support area of ​​the voice coil assembly on the diaphragm assembly 33. This results in better support of the dual voice coils on the diaphragm assembly 33 of the sound-generating device 100, thereby reducing the resonant area of ​​the diaphragm assembly 33. Consequently, the high-frequency broadening of the sound-generating device 100 is significantly improved, greatly enhancing the sound-generating effect of the sound-generating device 100.

[0043] According to some embodiments of the present invention, such as Figure 3 As shown, the first voice coil 31 has a first side 311 and a second side 312 connected end-to-end, and the second voice coil 32 has a third side 321 and a fourth side 322 connected end-to-end. One of the first side 311 and the second side 312 is formed as a fixed side, and one of the third side 321 and the fourth side 322 is formed as a supporting side. The two oppositely arranged supporting sides are respectively fixed to the oppositely arranged fixed sides. This arrangement can further improve the support effect of the voice coil assembly on the dome 332.

[0044] Specifically, in some embodiments, the first voice coil 31 includes a first side 311 and a second side 312 connected end-to-end. The lengths of the first side 311 and the second side 312 may be equal or unequal. The projection of the first voice coil 31 formed by the first side 311 and the second side 312 onto a horizontal plane perpendicular to the thickness direction of the sound-generating device 100 can be a square, a rectangle, or any other irregular shape, which is not limited here. The second voice coil 32 has a third side 321 and a fourth side 322 connected end-to-end. The lengths of the third side 321 and the fourth side 322 may be equal or unequal. The projection of the second voice coil 32 formed by the third side 321 and the fourth side 322 onto a horizontal plane perpendicular to the thickness direction of the sound-generating device 100 can be a square, a rectangle, or any other irregular shape, which is not limited here. It is understood that the shape and size of the second voice coil 32 and the first voice coil 31 are adapted to each other according to the specific product structure.

[0045] Furthermore, such as Figure 3 As shown, one of the first side 311 and the second side 312 is formed as a fixed side, and one of the third side 321 and the fourth side 322 is formed as a supporting side. The two oppositely arranged supporting sides are respectively fixed to the two oppositely arranged fixed sides. The fixed sides provide a basis for the connection and fixation between the second voice coil 32 and the first voice coil 31. The supporting side of the second voice coil 32, through its fixed connection with the fixed side of the first voice coil 31, can abut against the inner side of the first voice coil 31 facing the outer periphery of the second voice coil 32 along the relative directions of the two oppositely arranged supporting sides of the second voice coil 32, thereby serving to support the first voice coil 31.

[0046] like Figure 3 As shown, according to some embodiments of the present invention, the first voice coil 31 can be formed into a square structure, and the length of the first side 311 of the first voice coil 31 can be greater than the length of the second side 312, with the first side 311 being a fixed side. Thus, the supporting side of the second voice coil 32 is fixedly connected to the longer first side 311 of the first voice coil 31. By supporting the longer side of the first voice coil 31 with the second voice coil 32, the structural stability of the first voice coil 31 during vibration can be significantly improved, and the resonant area of ​​the vibration system 3 can be significantly reduced.

[0047] Specifically, such as Figure 3 As shown, the first voice coil 31 can be a rectangular structure with rounded corners at the connection between the first side 311 and the second side 312. The first side 311 is along the length direction of the first voice coil 31 (e.g., ...). Figure 3 Extending in the x-direction shown, the second side 312 extends along the width direction of the first voice coil 31 (as shown in the x-direction). Figure 3Extending in the y-direction (as shown), the length of the first side 311 is greater than that of the second side 312. The second voice coil 32 is a rectangular structure similar in shape to the first voice coil 31 but different in size. The second voice coil 32 is disposed within the space of the annular structure formed by the first side 311 and the second side 312 of the first voice coil 31. The two oppositely arranged fourth sides 322 of the second voice coil 32 are formed as supporting sides and fixed to the two oppositely arranged fixed sides of the first voice coil 31, i.e., the first side 311. The two oppositely arranged third sides 321 of the second voice coil 32 are opposite to and spaced apart from the two oppositely arranged second sides 312 of the first voice coil 31. It can be understood that in some other embodiments, the second voice coil 32 can have different shapes and sizes, and the two oppositely arranged third sides 321 of the second voice coil 32 are formed as supporting sides and fixedly connected to the two oppositely arranged fixed sides of the first voice coil 31.

[0048] like Figure 3 As shown, according to some embodiments of the present invention, the second voice coil 32 can be formed into a square structure, with the length of the third side 321 of the second voice coil 32 being greater than the length of the fourth side 322, and the fourth side 322 forming a support side. Thus, when the shorter side of the second voice coil 32 is formed as a support side, compared to the longer side, this increases the support strength of the second voice coil 32 on the first voice coil 31 when the second voice coil 32 is connected to the fixed side of the first voice coil 31, further improving the structural stability of the voice coil assembly composed of the second voice coil 32 and the first voice coil 31.

[0049] like Figure 3 As shown, according to some embodiments of the present invention, the first voice coil 31 is formed into a square structure, with two supporting sides fixed at the midpoint of two oppositely arranged fixed sides. This ensures the stability of the voice coil assembly during vibration.

[0050] Specifically, such as Figure 3 In the illustrated embodiment, the first voice coil 31 can be a rectangular structure with rounded corners at the connection between the first side 311 and the second side 312. The first side 311 is along the length direction of the first voice coil 31 (e.g., ...). Figure 3 Extending in the x-direction shown, the second side 312 extends along the width direction of the first voice coil 31 (as shown in the x-direction). Figure 3 Extending in the y-direction (as shown). The two oppositely arranged fourth sides 322 of the second voice coil 32 form supporting sides, and the two oppositely arranged first sides 311 of the first voice coil 31 form fixing sides. The fixing positions of the two fourth sides 322 of the second voice coil 32 and the two first sides 311 of the first voice coil 31 can be the center position of the first side 311 along the length direction of the first voice coil 31. That is, as shown... Figure 3As shown, the straight line connecting the center points of the two opposite fixed connection points of the second voice coil 32 and the first voice coil 31 divides the first voice coil 31 into two symmetrically arranged parts relative to this straight line. This ensures a uniform weight distribution in the voice coil assembly composed of the first voice coil 31 and the second voice coil 32, thereby guaranteeing the stability of the voice coil assembly during vibration. Alternatively, the fixed side of the first voice coil 31 can also be the second side 312, with the two fourth sides 322 of the second voice coil 32 fixedly connected to the midpoint of the two second sides 312 of the first voice coil 31. This also serves to support the first voice coil 31 and ensure stable vibration of both the first and second voice coils 31 and 32.

[0051] like Figure 4 In a specific example of the present invention shown, the first voice coil 31 is formed into a square-shaped annular structure. The first voice coil 31 includes a first side 311 and a second side 312 connected end to end. The length of the first side 311 is greater than the length of the second side 312, and the first side 311 is formed as a fixed side. The second voice coil 32 is also formed into a square-shaped annular structure. The second voice coil 32 includes a third side 321 and a fourth side 322 connected end to end. The length of the third side 321 is greater than the length of the fourth side 322, and the fourth side 322 is formed as a supporting side. The two oppositely arranged fourth sides 322 of the second voice coil 32 are respectively fixed to the two oppositely arranged first sides 311 of the first voice coil 31, and each fourth side 322 is fixed to the center position of the corresponding first side 311, and each fourth side 322 is fitted against the inner peripheral wall of the corresponding first side 311. Along the vibration direction of the vibration system 3, the extension heights of the first side 311, the second side 312, the third side 321, and the fourth side 322 are the same. Therefore, the second voice coil 32 can be nested inside the first voice coil 31 to provide good support for the first voice coil 31, thereby improving the support effect of the first voice coil 31 on the dome 332, greatly improving the high-frequency extension of the dome 332, and improving the sound production effect of the sound generating device 100.

[0052] According to some embodiments of the present invention, the outer peripheral wall of the supporting edge is fitted and connected to the inner peripheral wall of the fixed edge. This increases the contact area between the fixed positions of the first voice coil 31 and the second voice coil 32, thereby improving the connection stability of the first voice coil 31 and the second voice coil 32 and preventing the fixed positions of the first voice coil 31 and the second voice coil 32 from separating during operation of the sound-generating unit 100. Furthermore, the above arrangement also makes the mating structure of the first voice coil 31 and the second voice coil 32 more compact.

[0053] Specifically, such as Figure 3As shown, the two oppositely arranged fourth sides 322 of the second voice coil 32 form supporting sides, and the two oppositely arranged first sides 311 of the first voice coil 31 form fixing sides. The two oppositely arranged fourth sides 322 of the second voice coil 32 have outer peripheral walls, which lie on a plane perpendicular to the length and width directions of the first voice coil 31 (i.e., the outer peripheral walls lie on a plane perpendicular to the length and width directions of the first voice coil 31). Figure 3 (The planes shown in the x and y directions). The first side 311 of the first voice coil 31 has an inner peripheral wall opposite to the outer peripheral wall of the fourth side 322 of the second voice coil 32. When fixing the first voice coil 31 and the second voice coil 32, the outer peripheral wall of the fourth side 322 of the second voice coil 32 and the inner peripheral wall of the first side 311 of the first voice coil 31 can be fitted and fixedly connected. In other embodiments, the outer peripheral wall of the fourth side 322 of the second voice coil 32 can also be fitted and connected to the inner peripheral wall of the second side 312 of the first voice coil 31. That is, the connection position of the second voice coil 32 and the first voice coil 31 can be flexibly selected in application and is not limited to such a position. Figure 3 As shown in the embodiments.

[0054] In some embodiments of the present invention, the supporting edge and the fixed edge have the same extension length along the vibration direction of the vibration system 3. This arrangement ensures that the ends of the first voice coil 31 and the second voice coil 32 near the diaphragm 331 are located in the same plane, thereby facilitating the connection between the voice coil assembly and the diaphragm 331 or the dome 332.

[0055] Specifically, such as Figure 1 and Figure 3 As shown, the two oppositely arranged fourth sides 322 of the second voice coil 32 form supporting sides, and the two oppositely arranged first sides 311 of the first voice coil 31 form fixed sides. The vibration direction of the vibration system 3 is perpendicular to the plane containing the x and y directions. The fourth side 322 of the second voice coil 32 and the first side 311 of the first voice coil 31 have the same extension length along the vibration direction of the vibration system 3, that is, along the thickness direction of the sound-generating device 100. The second voice coil 32 and the first voice coil 31 have the same size. After the fourth side 322 of the second voice coil 32 and the first side 311 of the first voice coil 31 are fixed, the two ends of the first voice coil 31 and the second voice coil 32 along the thickness direction can be overlapped respectively. That is, the first voice coil 31 and the second voice coil 32 both have one end close to the magnetic circuit system 2 and one end close to the diaphragm 331. The fourth side 322 and the first side 311 have the same extension length along the vibration direction of the vibration system 3, which can ensure that the ends of the first voice coil 31 and the second voice coil 32 close to the diaphragm 331 are located in the same plane. Thus, it is convenient to connect the voice coil assembly to the diaphragm 331 or the dome 332.

[0056] According to some embodiments of the present invention, the fourth side 322 and the third side 321 of the second voice coil 32 may be located in a plane perpendicular to the vibration direction of the vibration system 3. In other embodiments, the fourth side 322 and the third side 321 of the second voice coil 32 are located in a plane parallel to the vibration direction of the vibration system 3.

[0057] Specifically, such as Figure 3 As shown, the fourth side 322 of the second voice coil 32 extends in the x-direction, the third side 321 extends in the y-direction, and the vibration direction of the vibration system 3 is perpendicular to the x-direction. Figure 3 The directions of the plane containing the x and y directions, i.e., the vibration directions of vibration system 3, are as follows: Figure 4 The Z direction is shown. The fourth side 322 and the third side 321 of the second voice coil 32 lie in a plane perpendicular to the vibration direction of the vibration system 3, that is... Figure 3 The plane formed by the x and y directions is similar; in the case of... Figure 3 and Figure 4 In the illustrated embodiment, the first side 311 and the second side 312 of the first voice coil 31 are also located in a plane perpendicular to the vibration direction of the vibration system 3. This arrangement simplifies the processing and assembly of the voice coil assembly, making it easier to operate.

[0058] In some other embodiments, the fourth side 322 and the third side 321 of the second voice coil 32 may lie in a plane parallel to the vibration direction of the vibration system 3. The second voice coil 32 may be a flat voice coil, specifically, such as... Figure 5 and Figure 6 As shown, the vibration direction of vibration system 3 is as follows: Figure 5 and Figure 6 The Z direction is shown in the diagram. The fourth side 322 of the second voice coil 32 is fixedly connected to the first side 311 of the first voice coil 31. When the first voice coil 31 and the second voice coil 32 are assembled, the plane containing the length extension direction of the fourth side 322 of the second voice coil 32 and the length extension direction of the third side 321 is perpendicular to the plane containing the length extension direction of the first side 311 and the length extension direction of the second side 312 of the first voice coil 31. This makes the fourth side 322 and the third side 321 lie in a plane parallel to the vibration direction of the vibration system 3, which can reduce the space occupied by the second voice coil 32 in the central magnetic part 21 and improve the utilization rate of the magnetic field.

[0059] In some embodiments of the present invention, such as Figure 2 and Figure 4As shown, the fourth side 322 and the third side 321 of the second voice coil 32 are located in a plane perpendicular to the vibration direction of the vibration system 3. The central magnetic part 21 includes a first magnetic part 211, a second magnetic part 212, and a third magnetic part 213 spaced apart. The first magnetic part 211 and the third magnetic part 213 are spaced apart from the second magnetic part 212 to form a second magnetic gap 24. With this arrangement, the combination of the first voice coil 31 and the second voice coil 32 can improve the magnetic field utilization rate and increase the BL value.

[0060] Specifically, for example, Figure 2 and Figure 4 In the embodiment shown, the diaphragm assembly 33 of the vibration system 3 is fixedly connected to the periphery of the opening at one end of the housing 1, and the magnetic yoke 25 of the magnetic circuit system 2 is fixed to the opening at the other end of the housing 1, thereby jointly enclosing and forming an internal installation space.

[0061] The voice coil assembly includes a first voice coil 31 and a second voice coil 32. The fourth side 322 and the third side 321 of the second voice coil 32 are located in a plane perpendicular to the vibration direction of the vibration system 3. The two oppositely arranged fourth sides 322 of the second voice coil 32 form support sides, and the two oppositely arranged first sides 311 of the first voice coil 31 form fixed sides. The two oppositely arranged fourth sides 322 of the second voice coil 32 are fixedly connected to the two oppositely arranged first sides 311 of the first voice coil 31, and the two oppositely arranged third sides 321 of the second voice coil 32 are spaced apart from the two oppositely arranged second sides 312 of the first voice coil 31. The fourth sides 322 of the second voice coil 32 and the first sides 311 of the first voice coil 31 have the same length in the thickness direction of the sound-generating device 100. The ends of the first voice coil 31 and the second voice coil 32 near the diaphragm assembly 33 are respectively fixedly connected to the diaphragm assembly 33.

[0062] The magnetic circuit system 2 includes a central magnetic section 21 and side magnetic sections 22. The central magnetic section 21 and side magnetic sections 22 are fixed to the side of the magnetic yoke 25 facing the diaphragm assembly 33. The side magnetic sections 22 are spaced apart on the outer periphery of the central magnetic section 21, together defining a first magnetic gap 23. The first side 311 and the second side 312 of the first voice coil 31, away from the diaphragm assembly 33, are inserted into the first magnetic gap 23. The side magnetic section 22 includes a washer 222 and a side magnet 221. The washer 222 and the side magnet 221 are stacked sequentially along the thickness direction of the sound-generating device 100. The washer 222 can be injection molded to the inner side of the housing 1, and the side magnet 221 is arranged around the central magnetic section 21, such as... Figure 2 As shown, the side magnet 221 includes two sets of magnets arranged opposite each other. The number of side magnets 221 can be flexibly selected and is not limited to... Figure 2 As shown.

[0063] like Figure 2 and Figure 4As shown, the central magnetic section 21 includes a first magnetic section 211, a second magnetic section 212, and a third magnetic section 213. The first magnetic section 211, the second magnetic section 212, and the third magnetic section 213 are spaced apart along the length of the first side 311 of the first voice coil 31. The first magnetic section 211 includes a first center washer 2112 and a first center magnet 2111 stacked along the thickness direction of the sound-generating device 100. The second magnetic section 212 includes a second center washer 2122 and a second center magnet 2121 stacked along the thickness direction of the sound-generating device 100. The third magnetic section 213 includes a third center washer 2132 and a third center magnet 2131 stacked along the thickness direction of the sound-generating device 100. The first magnetic section 211 and the third magnetic section 213 are spaced apart from the second magnetic section 212 to form a second magnetic gap 24. The end of the second voice coil 32 away from the diaphragm assembly 33 is inserted into the second magnetic gap 24, and the second magnetic part 212 is at least partially located in the space enclosed by the fourth side 322 and the third side 321 of the second voice coil 32.

[0064] In some other embodiments of the present invention, such as Figure 5 As shown, the fourth side 322 and the third side 321 of the second voice coil 32 are located in a plane parallel to the vibration direction of the vibration system 3. The central magnetic part 21 includes a first magnetic part 211 and a second magnetic part 212 spaced apart, forming a second magnetic gap 24. This arrangement reduces the space occupied by the second voice coil 32 on the central magnetic part 21, thereby increasing the volume of the central magnetic part 21 and improving the magnetic field strength.

[0065] Specifically, for example, Figure 5 and Figure 6 In the illustrated embodiment, the second voice coil 32 is a flat voice coil, meaning that the second voice coil 32 has a smaller dimension along the axial direction perpendicular to the plane containing the third side 321 and the fourth side 322. The fourth side 322 of the second voice coil 32 is fixedly connected to the first side 311 of the first voice coil 31. When the first voice coil 31 and the second voice coil 32 are assembled, the plane containing the length extension direction of the fourth side 322 of the second voice coil 32 and the length extension direction of the third side 321 is perpendicular to the plane containing the length extension direction of the first side 311 and the length extension direction of the second side 312 of the first voice coil 31. This ensures that the fourth side 322 and the third side 321 lie in a plane parallel to the vibration direction of the vibration system 3.

[0066] Correspondingly, such as Figure 5 and Figure 6As shown, the central magnetic section 21 of the magnetic circuit system 2 includes a first magnetic section 211 and a second magnetic section 212 spaced apart along the length direction of the first side 311 of the first voice coil 31. The first magnetic section 211 includes a first central washer 2112 and a first central magnet 2111 stacked along the thickness direction of the sound-generating device 100. The second magnetic section 212 includes a second central washer 2122 and a second central magnet 2121 stacked along the thickness direction of the sound-generating device 100. The first magnetic section 211 and the second magnetic section 212 are spaced apart to form a second magnetic gap 24. The end of the second voice coil 32 away from the diaphragm assembly 33 is inserted into the second magnetic gap 24. That is, in this embodiment, the third side 321 of the second voice coil 32, which is a flat voice coil, away from the diaphragm assembly 33 is inserted into the second magnetic gap 24.

[0067] According to some embodiments of the present invention, there may be multiple second voice coils 32, which are spaced apart along the length of the fixed side of the first voice coil 31. The central magnetic part 21 is provided with multiple second magnetic gaps 24 corresponding one-to-one with the multiple second voice coils 32. Thus, compared with the case where a single second voice coil 32 supports the first voice coil 31, the supporting effect of the second voice coil 32 on the first voice coil 31 can be significantly enhanced, the resonant area of ​​the vibration system 3 can be significantly reduced, and the high-frequency performance can be effectively improved.

[0068] In some specific embodiments of the present invention, the number of second voice coils 32 can be set to multiple. The two oppositely arranged third sides 321 or fourth sides 322 of each second voice coil 32 are respectively fixedly connected to the two oppositely arranged first sides 311 or second sides 312 of the first voice coil 31, that is, the supporting side of the second voice coil 32 is connected to the fixed side of the first voice coil 31. For example, in one specific embodiment, the fourth side 322 of the second voice coil 32 is formed as a supporting side, and the first side 311 of the first voice coil 31 is formed as a fixed side. Since the fourth side 322 of each second voice coil 32 is fixedly connected to the first side 311 of the first voice coil 31, multiple second voice coils 32 are spaced apart and connected to the inner side of the first voice coil 31 along the length direction of the first side 311. Further, in some embodiments, the spacing between two adjacent second voice coils 32 along the length direction of the first side 311 can be equal, thereby improving the stability of the voice coil assembly during vibration.

[0069] According to some embodiments of the present invention, the first voice coil 31 and the second voice coil 32 can be integrally wound and formed. In other embodiments, the first voice coil 31 and the second voice coil 32 are separate parts, and the first voice coil 31 and the second voice coil 32 are glued together.

[0070] Specifically, in some embodiments, the first voice coil 31 and the second voice coil 32 can be formed as a single integrated structure by integral winding. Through integral winding, the first voice coil 31 surrounds the outer periphery of the second voice coil 32, and the second voice coil 32 supports the first voice coil 31. With this configuration, the voice coil assembly composed of the first voice coil 31 and the second voice coil 32 is a single integrated structure, resulting in a more stable connection. Furthermore, it can significantly reduce the resonant area of ​​the vibration system 3, effectively improving high-frequency performance.

[0071] Optionally, in some other embodiments, the first voice coil 31 and the second voice coil 32 are separate components. During assembly, the first voice coil 31 and the second voice coil 32 can be fixed by means of bonding, not limited to adhesive bonding, so that the fourth side 322 of the second voice coil 32 is fixedly connected to the first side 311 or the second side 312 of the first voice coil 31. This configuration simplifies operation and improves assembly efficiency.

[0072] According to some embodiments of the present invention, the vibration system 3 includes a diaphragm assembly 33, and the end of the voice coil assembly away from the magnetic circuit system 2 is connected to the diaphragm assembly 33. The diaphragm assembly 33 may include a conductive diaphragm, and the voice coil assembly is electrically connected to the conductive diaphragm. In other embodiments of the present invention, the sound-generating device 100 may include a centering support plate disposed between the voice coil assembly and the diaphragm assembly 33. The centering support plate has a first pad and a second pad electrically connected to the first voice coil 31, and a third pad and a fourth pad electrically connected to the second voice coil 32.

[0073] Specifically, in some embodiments, such as Figure 2 and Figure 7 As shown, the vibration system 3 includes a diaphragm assembly 33, which includes a diaphragm 331 and a dome 332. The diaphragm 331 is fixedly connected to the outer periphery of the open end of the housing 1, and the dome 332 is fixedly connected to the side of the diaphragm 331 facing the magnetic circuit system 2. The central portion of the diaphragm 331 can be configured as a hollow area, and the dome 332 is at least partially exposed in the central portion of the diaphragm 331. The ends of the first voice coil 31 and the second voice coil 32 away from the magnetic circuit system 2 are both connected to the dome 332.

[0074] A conductive diaphragm can be disposed on the side of the diaphragm 331 facing the magnetic circuit system 2. This conductive diaphragm is used to conduct the circuit, enabling electrical connection between the voice coil assembly and external circuitry. Specifically, the conductive diaphragm may include a first conductive diaphragm and a second conductive diaphragm. The first conductive diaphragm is used to conduct the connection between the voice coil assembly and external circuitry. The first conductive diaphragm can be disposed at the four corners of the housing 1, and correspondingly, the four corners of the housing 1 are provided with external solder pads for electrical connection to the outside. Figure 7As shown, a connecting hole 3321 is provided on the dome 332. One end of the first conductive diaphragm extends to be electrically connected to the outer pad of the housing 1. The other end of the first conductive diaphragm extends to the connecting hole 3321 of the dome 332. The leads of the first voice coil 31 and the second voice coil 32 are electrically connected to the other end of the conductive diaphragm through the connecting hole 3321, thus realizing the electrical connection between the voice coil assembly and the outside. The second conductive diaphragm is provided at the corresponding position on the side of the diaphragm 331 facing the voice coil assembly, and is used to conduct the circuit. The leads of the first voice coil 31 and the second voice coil 32 pass through the connecting hole 3321 and are respectively connected to the second conductive diaphragm, thereby realizing the series connection of the first voice coil 31 and the second voice coil 32. At the same time, it can also effectively improve the connection stability of the leads of the first voice coil 31 and the second voice coil 32. In addition, by setting the conductive diaphragm of the diaphragm assembly 33 to be electrically connected to the voice coil assembly, the distance between the leads of the first voice coil 31 and the second voice coil 32 is shortened, which is beneficial to improving the stability of the electrical connection of the sound generating device 100.

[0075] In other embodiments of the present invention, the voice coil assembly can also be electrically connected to the outside via a centering support. Specifically, the centering support can be disposed between the diaphragm assembly 33 and the voice coil assembly, that is, the centering support is fixedly connected to the side of the diaphragm assembly 33 facing the magnetic circuit system 2, and the first voice coil 31 and the second voice coil 32 are fixedly connected to the side of the centering support facing the magnetic circuit system 2. The housing 1 is provided with an outer pad electrically connected to the centering support, and the centering support is provided with a first pad, a second pad, a third pad, and a fourth pad. Among them, the first pad and the second pad are electrically connected to the first voice coil 31, and the third pad and the fourth pad are electrically connected to the second voice coil 32. The first voice coil 31 and the second voice coil 32 are connected in series via the centering support, and the voice coil assembly is electrically connected to the outer pad of the housing 1 via the centering support, thereby achieving electrical connection with the external circuit. This arrangement makes the electrical connection stability of the sound generating device 100 higher and facilitates assembly.

[0076] An electronic device according to a second embodiment of the present invention includes a sound-generating device 100 according to the above embodiments of the present invention. Optionally, the electronic device may be a mobile phone, a tablet computer, a laptop computer, etc.

[0077] According to the present invention, the electronic device is equipped with the above-mentioned sound-generating device 100. The second voice coil 32 of the sound-generating device 100 supports the first voice coil 31, and the resonant area of ​​the diaphragm assembly 33 is small, which makes the high frequency of the electronic device significantly broadened and greatly improves the high frequency effect of the electronic device.

[0078] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0079] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0080] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions 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 one or more embodiments or examples.

[0081] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A sound producing device, characterized by, The application relates to a loudspeaker, which comprises a shell, a magnetic circuit system arranged in the shell, the magnetic circuit system comprising a central magnetic part and a side magnetic part, the central magnetic part and the side magnetic part being arranged at intervals to define a first magnetic gap, the central magnetic part being provided with a second magnetic gap, and the first magnetic gap being arranged around the periphery of the second magnetic gap, and a vibration system comprising a voice coil assembly, the voice coil assembly comprising a first voice coil and a second voice coil, the first voice coil being arranged at the periphery of the second voice coil, one end of the first voice coil being inserted into the first magnetic gap, and one end of the second voice coil being inserted into the second magnetic gap. The application relates to a loudspeaker, which comprises a shell, a magnetic circuit system arranged in the shell, the magnetic circuit system comprising a central magnetic part and a side magnetic part, the central magnetic part and the side magnetic part being arranged at intervals to define a first magnetic gap, the central magnetic part being provided with a second magnetic gap, and the first magnetic gap being arranged around the periphery of the second magnetic gap, and a vibration system comprising a voice coil assembly, the voice coil assembly comprising a first voice coil and a second voice coil, the first voice coil being arranged at the periphery of the second voice coil, one end of the first voice coil being inserted into the first magnetic gap, and one end of the second voice coil being inserted into the second magnetic gap. The second voice coil is provided with two oppositely arranged fixed edges, the first voice coil is provided with a first fixed edge and a second fixed edge connected at the head and tail, the second voice coil is provided with a third fixed edge and a fourth fixed edge connected at the head and tail, one of the first fixed edge and the second fixed edge is formed into a fixed edge, one of the third fixed edge and the fourth fixed edge is formed into a supporting edge, the two oppositely arranged supporting edges are fixed to the two oppositely arranged fixed edges respectively, and the outer peripheral wall of the supporting edge is connected to the inner peripheral wall of the fixed edge. The first voice coil is formed into a square structure, the length of the first fixed edge is greater than the length of the second fixed edge, and the first fixed edge is formed into the fixed edge. The second voice coil is formed into a square structure, the length of the third fixed edge is greater than the length of the fourth fixed edge, and the fourth fixed edge is formed into the supporting edge.

2. The sound production device of claim 1, wherein, The first voice coil is formed into a square structure, and the two supporting edges are fixed to the middle positions of the two oppositely arranged fixed edges respectively.

3. The sound production device of claim 1, wherein, The supporting edge and the fixed edge have the same extension length along the vibration direction of the vibration system.

4. The sound production device of claim 1, wherein, The fourth fixed edge and the third fixed edge are located in a plane perpendicular to the vibration direction of the vibration system.

5. The sound production device of claim 1, wherein, Or, the fourth fixed edge and the third fixed edge are located in a plane parallel to the vibration direction of the vibration system.

6. The sound production device of claim 1, wherein, The fourth fixed edge and the third fixed edge are located in a plane perpendicular to the vibration direction of the vibration system, the central magnetic part comprises a first magnetic part, a second magnetic part and a third magnetic part arranged at intervals, and the first magnetic part and the third magnetic part are arranged at intervals with the second magnetic part to form the second magnetic gap. The fourth fixed edge and the third fixed edge are located in a plane parallel to the vibration direction of the vibration system, the central magnetic part comprises a first magnetic part and a second magnetic part arranged at intervals, and the first magnetic part and the second magnetic part are arranged at intervals to form the second magnetic gap.

7. The sound production device of claim 6, wherein, The second voice coil is provided with a plurality of second voice coils arranged at intervals along the length direction of the fixed edge, and the central magnetic part is provided with a plurality of second magnetic gaps corresponding to the plurality of second voice coils.

8. The sound production device of claim 6, wherein, The first voice coil and the second voice coil are integrally wound and formed.

9. The sound production device of claim 1, wherein, Or, the first voice coil and the second voice coil are formed into separate parts and are connected by adhesive.

10. The sound production device of any one of claims 1-9, wherein, The vibration system further comprises a diaphragm assembly, and one end of the voice coil assembly away from the magnetic circuit system is connected to the diaphragm assembly. The diaphragm assembly comprises a conductive film, and the voice coil assembly is electrically connected to the conductive film.

11. The sound production device of any one of claims 1-9, wherein, ​ ​ Or, the sound production device further comprises a centering support, the centering support is arranged between the voice coil assembly and the diaphragm assembly, the centering support is provided with a first pad and a second pad electrically connected with the first voice coil, and a third pad and a fourth pad electrically connected with the second voice coil.

12. An electronic device, comprising: The sound production device according to any one of claims 1-11.

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