Loudspeaker and electronic equipment

Abstract

The loudspeaker comprises a metal support, a magnetic circuit system, a conducting strip and a vibration system, the magnetic circuit system and the vibration system are connected to the upper side and the lower side of the metal support, a magnetic yoke of the magnetic circuit system is connected with the metal support, the magnetic yoke is provided with a through hole, a magnetic gap is formed in a magnetic group, and the conducting strip is arranged in the magnetic group. One end of the voice coil is connected with the diaphragm assembly, the other end of the voice coil is suspended in the magnetic gap, the conducting strip is located in the through hole, the two ends of the conducting strip are electrically connected with the magnetic group and an external circuit respectively, the diaphragm assembly is provided with a first conducting part and a second conducting part which are spaced from each other, and the first conducting part is electrically connected with the voice coil and the magnetic group. The second conductive part is electrically connected with the voice coil and the metal support. The conductive part is arranged on the vibrating diaphragm assembly to be connected with the voice coil, and the whole magnetic circuit system and the metal bracket are used for conducting a circuit, so that more space is provided, the volume of a magnetic group is increased, and the magnetic induction intensity is enhanced.

Description

Technical Field

[0001] This invention relates to the field of electroacoustic transduction technology, specifically to a loudspeaker and an electronic device. Background Technology

[0002] In recent years, with the rapid development of consumer electronics, smartphones, VR devices, and other electronic devices have gained consumer acceptance and widespread application. Speakers are crucial electroacoustic transducers in consumer electronics, and with the rapid development of electronic products, people's requirements for the acoustic performance of speakers are also increasing.

[0003] To achieve better acoustic performance, loudspeakers often require a larger magnetic circuit system with a stronger magnetic field. Existing loudspeakers typically use conductive supports or other structures to conduct electricity to the voice coil. These conductive supports or other structures usually occupy some space in the magnetic circuit system, limiting the size of the magnets and thus reducing the magnetic field strength, lowering the black-white (BL) value, and affecting the loudspeaker's acoustic performance. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a loudspeaker and electronic device that, by changing the circuit conduction method, allows for more space to increase the volume of the magnetic assembly and enhance the magnetic induction intensity.

[0005] In a first aspect, embodiments of the present invention provide a loudspeaker, the loudspeaker comprising: Metal bracket; A magnetic circuit system is connected below the metal bracket. The magnetic circuit system includes a magnetic yoke and a magnetic assembly disposed on the magnetic yoke. The magnetic yoke is electrically connected to the metal bracket. A magnetic gap is formed in the magnetic assembly. The magnetic yoke is provided with a through hole. A conductive sheet is located inside the through hole. One end of the conductive sheet is electrically connected to the magnetic assembly, and the other end of the conductive sheet is used for electrical connection to an external circuit. A vibration system is connected above the metal bracket. The vibration system includes a diaphragm assembly and at least one voice coil. One end of the voice coil is connected to the diaphragm assembly, and the other end of the voice coil is suspended in the magnetic gap. The diaphragm assembly is provided with a first conductive part and a second conductive part spaced apart from each other. The first conductive part is electrically connected to the voice coil and the magnet assembly, and the second conductive part is electrically connected to the voice coil and the metal bracket.

[0006] Optionally, the magnetic assembly includes an annular outer magnetic part, an annular middle magnetic part, and an inner magnetic part. The outer magnetic part is disposed around the outside of the middle magnetic part, and the inner magnetic part is disposed inside the middle magnetic part. A first magnetic gap is formed between the outer magnetic part and the middle magnetic part, and a second magnetic gap is formed between the middle magnetic part and the inner magnetic part. The vibration system includes an inner voice coil and an outer voice coil. One end of the outer voice coil and one end of the inner voice coil are both connected to the diaphragm assembly. The outer voice coil is arranged around the outside of the inner voice coil. The other end of the outer voice coil is suspended in the first magnetic gap, and the other end of the inner voice coil is suspended in the second magnetic gap.

[0007] Optionally, one end of the conductive sheet is electrically connected to the inner magnetic part, the first conductive part is electrically connected to the inner voice coil, the outer voice coil and the inner magnetic part, and the second conductive part is electrically connected to the inner voice coil, the outer voice coil and the metal bracket.

[0008] Optionally, the diaphragm assembly has two spaced-apart first conductive blocks and second conductive blocks. The inner voice coil and the outer voice coil are electrically connected through the first conductive blocks and the second conductive blocks. The first conductive part is electrically connected to the first conductive block and the inner magnetic part, and the second conductive part is electrically connected to the second conductive block and the metal bracket.

[0009] Optionally, the diaphragm assembly includes a diaphragm and a dome, the dome being connected to the side of the diaphragm facing the magnetic circuit system, and the dome being provided with a first connection hole and a second connection hole at intervals; The first conductive block is disposed in the first connecting hole, and the second conductive block is disposed in the second connecting hole.

[0010] Optionally, the first conductive portion is disposed on the diaphragm and both ends of the first conductive portion extend to be electrically connected to the first conductive block and the inner magnetic portion, respectively; the second conductive portion is disposed on the diaphragm and both ends of the second conductive portion extend to be electrically connected to the second conductive block and the metal bracket, respectively.

[0011] Optionally, the dome is a ring-shaped structure, and the dome is arranged around the outside of the inner magnetic part; The diaphragm includes a first folded ring portion, a second folded ring portion, and two connecting portions. The first folded ring portion is arranged around the outside of the second folded ring portion. The two connecting portions are symmetrically arranged and connected between the first folded ring portion and the second folded ring portion. The first folded ring portion is located on the outside of the dome and is connected to the metal bracket. The second folded ring portion is located on the inside of the dome and is connected to the inner magnet portion. The two connecting portions are located on the dome.

[0012] Optionally, the first connecting hole and the second connecting hole are provided in a one-to-one correspondence with the two connecting parts.

[0013] Optionally, the loudspeaker further includes a first insulating portion and a second insulating portion, the first insulating portion being disposed between the inner magnetic portion and the magnetic yoke and surrounding the outside of the through hole, and the second insulating portion being disposed on the side of the magnetic yoke away from the inner magnetic portion and surrounding the outside of the through hole.

[0014] Optionally, the corners of the magnetic yoke are bent upwards with multiple connecting pieces, and the metal bracket is provided with multiple insertion holes, with each connecting piece and each insertion hole being physically and electrically connected.

[0015] Optionally, the inner magnetic part includes a first inner magnet, an inner pole piece, and a second inner magnet stacked sequentially from top to bottom. A conductive layer is provided between the first inner magnet and the inner pole piece, and between the inner pole piece and the second inner magnet. The conductive piece is attached to the bottom of the second inner magnet.

[0016] Optionally, the central magnetic part includes a central pole piece and a central magnet stacked sequentially from top to bottom, and the central pole piece and the central magnet are arranged in a ring.

[0017] Optionally, the outer magnetic part includes an outer magnet with a ring structure, which is disposed between the magnetic yoke and the metal support.

[0018] Optionally, the inner side of the dome is recessed towards the magnetic circuit system to form a connecting plane, and the outer side of the dome is bent towards the magnetic circuit system to form a connecting sidewall. The inner voice coil is connected to the connecting plane, and the outer voice coil is connected to the connecting sidewall.

[0019] In a second aspect, embodiments of the present invention provide an electronic device, the electronic device comprising: case; The speaker as described in the first aspect is disposed within the housing.

[0020] In this embodiment, the magnetic circuit system and vibration system of the loudspeaker are connected to the upper and lower sides of the metal bracket. The magnetic yoke of the magnetic circuit system is connected to the metal bracket and has a through hole. A magnetic gap is formed within the magnetic assembly. One end of the voice coil is connected to the diaphragm assembly, and the other end of the voice coil is suspended within the magnetic gap. A conductive sheet is located within the through hole and its two ends are electrically connected to the magnetic assembly and an external circuit, respectively. The diaphragm assembly has a first conductive part and a second conductive part spaced apart from each other. The first conductive part is electrically connected to the voice coil and the magnetic assembly, and the second conductive part is electrically connected to the voice coil and the metal bracket. By providing conductive parts on the diaphragm assembly to connect the voice coil and utilizing the entire magnetic circuit system and the metal bracket for circuit conduction, more space is available to increase the volume of the magnetic assembly and enhance the magnetic induction intensity. Attached Figure Description

[0021] The above and other objects, features and advantages of the present invention will become clearer from the following description of embodiments of the invention with reference to the accompanying drawings, in which: Figure 1 This is a cross-sectional view of a loudspeaker according to an embodiment of the present invention; Figure 2 This is an exploded view of the loudspeaker according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the vibration system according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the magnetic circuit system according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the diaphragm structure according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the first conductive part and the second conductive part located on the diaphragm according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the dome structure according to an embodiment of the present invention.

[0022] Figure label: 1-Metal bracket; 11-Connection hole; 2-Magnetic circuit system; 21-Magnetic yoke; 211-Connecting piece; 212-Through hole; 22-Outer magnetic part; 221-Outer magnet; 23-Middle magnetic part; 231-Middle pole piece; 232-Middle magnet; 24-Inner magnetic part; 241-First inner magnet; 242-Inner pole piece; 243-Second inner magnet; 244-Conductive layer; 25-First magnetic gap; 26-Second magnetic gap; 3-Conductive piece; 4-Vibration system; 41-Diaphragm assembly; 411-First conductive block; 412-Second conductive block; 42-Inner voice coil; 43-Outer voice coil; 44-Diaphragm; 441-First surround; 4411-First surround; 4412-First inner fixing part; 44 13-First external fixing part; 442-Second folded ring part; 4421-Second folded ring; 4422-Second internal fixing part; 4423-Second external fixing part; 443-Connecting part; 45-Spherical dome; 451-First stepped surface; 452-Second stepped surface; 453-Third stepped surface; 454-First connecting hole; 455-Second connecting hole; 456-Connecting plane; 457-Connecting sidewall; 5-First conductive part; 51-First bent section; 52-First connecting section; 53-Second connecting section; 6-Second conductive part; 61-Second bent section; 62-Third connecting section; 63-Fourth connecting section; 7-First insulating part; 8-Second insulating part. Detailed Implementation

[0023] The present application is described below based on embodiments, but it is not limited to these embodiments. In the detailed description of the present application below, certain specific details are described in detail. Those skilled in the art can fully understand the present application without these details. To avoid obscuring the substance of the present application, well-known methods, processes, flows, elements, and circuits are not described in detail.

[0024] Furthermore, those skilled in the art should understand that the accompanying drawings provided herein are for illustrative purposes only and are not necessarily drawn to scale.

[0025] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0026] Unless the context explicitly requires it, words such as "including" or "contains" throughout the application should be interpreted as including rather than exclusive or exhaustive; that is, meaning "including but not limited to".

[0027] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0028] Figure 1 This is a schematic diagram of the speaker structure according to an embodiment of this application. Figures 1-4 As shown, the loudspeaker includes a metal bracket 1, a magnetic circuit system 2, a conductive sheet 3, and a vibration system 4. The magnetic circuit system 2 and the vibration system 4 are connected to the metal bracket 1, specifically located below and above the metal bracket 1, respectively. It should be noted that the magnetic circuit system 2 and the vibration system 4 are arranged opposite to each other. The magnetic circuit system 2 includes a magnetic yoke 21 and a magnetic assembly on the yoke 21. The vibration system 4 includes a diaphragm assembly 41 and at least one voice coil. A magnetic gap is formed within the magnetic assembly. One end of the voice coil is connected to the diaphragm assembly 41, and the other end of the voice coil is suspended within the magnetic gap.

[0029] The diaphragm assembly 41 is provided with a first conductive part 5 and a second conductive part 6. The first conductive part 5 is electrically connected to the voice coil and the magnetic assembly, and the second conductive part 6 is electrically connected to the voice coil and the metal support 1. The magnetic yoke 21 is connected to the metal support 1. A conductive sheet 3 is disposed in the through hole 212 of the magnetic yoke 21. One end of the conductive sheet 3 is electrically connected to the magnetic assembly, and the other end of the conductive sheet 3 is electrically connected to an external circuit. Thus, external current flows into the voice coil through the conductive sheet 3, the magnetic assembly, and the first conductive part 5 in sequence. The current flowing out of the voice coil flows through the second conductive part 6, the metal support 1, and to the magnetic yoke 21. In this embodiment, the loudspeaker uses two conductive parts on the diaphragm assembly 41 to connect the voice coil and utilizes the magnetic assembly, the magnetic yoke 21, and the metal support 1 for circuit conduction. This eliminates the need for additional conductive supports or other structures to provide more internal space to increase the volume of the magnetic assembly, thereby enhancing the magnetic induction intensity.

[0030] In this embodiment, the magnetic assembly includes an outer magnetic part 22, a middle magnetic part 23, and an inner magnetic part 24, such as... Figure 1 , Figure 2 and Figure 3 As shown. The vibration system 4 includes two voice coils, namely an inner voice coil 42 and an outer voice coil 43, as follows. Figure 1 , Figure 2 and Figure 3 As shown. The outer magnetic part 22 and the middle magnetic part 23 are ring-shaped. The outer magnetic part 22 is arranged around the outside of the middle magnetic part 23, and the inner magnetic part 24 is arranged inside the middle magnetic part 23 (that is, the middle magnetic part 23 is arranged around the outside of the inner magnetic part 24). A first magnetic gap 25 is formed between the outer magnetic part 22 and the middle magnetic part 23, and a second magnetic gap 26 is formed between the middle magnetic part 23 and the inner magnetic part 24. The outer voice coil 43 is arranged around the outside of the inner voice coil 42. One end of the outer voice coil 43 and one end of the inner voice coil 42 are connected to the diaphragm assembly 41. The other end of the outer voice coil 43 is suspended in the first magnetic gap 25, and the other end of the inner voice coil 42 is suspended in the second magnetic gap 26. The outer side of the diaphragm assembly 41 is connected to the metal bracket 1.

[0031] The magnetic yoke 21 is connected to the metal support 1. A through hole 212 is provided on the magnetic yoke 21, and the position of the through hole 212 corresponds to the inner magnetic part 24. A conductive sheet 3 is disposed within the through hole 212 of the magnetic yoke 21. One end of the conductive sheet 3 is electrically connected to the inner magnetic part 24, and the other end is electrically connected to an external circuit. The first conductive part 5 on the diaphragm assembly 41 is electrically connected to the inner voice coil 42, the outer voice coil 43, and the inner magnetic part 24. The second conductive part 6 is electrically connected to the inner voice coil 42, the outer voice coil 43, and the metal support 1. Thus, external current flows sequentially through the conductive sheet 3, the inner magnetic part 24, and the first conductive part 5 into the inner voice coil 42 and the outer voice coil 43. The current flowing out from the inner voice coil 42 and the outer voice coil 43 flows through the second conductive part 6 and the metal support 1 to the magnetic yoke 21. In this embodiment, the loudspeaker connects the inner voice coil 42 and the outer voice coil 43 by setting two conductive parts on the diaphragm assembly 41, and uses the inner magnetic part 24, the magnetic yoke 21 and the metal bracket 1 to conduct the circuit. There is no need to set additional conductive brackets or other structures to make the metal bracket 1 have more space to increase the volume of each magnetic part, thereby enhancing the magnetic induction intensity.

[0032] The first magnetic gap 25 and the second magnetic gap 26 are concentrically arranged and independently operating annular magnetic gaps, forming a nested double annular magnetic gap. These gaps provide an independent and efficient magnetic field environment for the outer voice coil 43 and the inner voice coil 42, driving both to simultaneously vibrate the diaphragm assembly 41 and produce sound. This double annular magnetic gap structure constitutes two independent, efficient, radially distributed driving regions, fully utilizing radial space to achieve dual driving within a limited volume. Combined with the inner and outer dual voice coil design, it achieves symmetrical driving of the diaphragm assembly 41, significantly improving the speaker's driving force, power capacity, high-frequency linearity, and acoustic consistency. One end of the outer voice coil 43 and one end of the inner voice coil 42 are simultaneously fixed to the diaphragm assembly 41, greatly enhancing its overall rigidity. Furthermore, the physical separation of the outer voice coil 43 and the inner voice coil 42 prevents heat transfer and increases the overall surface area, improving heat dissipation efficiency.

[0033] Optionally, the magnetic circuit system 2 and the vibration system 4 can be arranged in a square shape. For example, the magnetic circuit system 2 may include an outer magnetic part 22 with a square annular structure, a middle magnetic part 23 with a square annular structure, and an inner magnetic part 24 with a square structure. Correspondingly, the first magnetic gap 25 and the second magnetic gap 26 are both formed as square annular magnetic gaps. For example, the vibration system 4 may include a diaphragm assembly 41 with a square structure, an inner voice coil 42 with a square annular structure, and an outer voice coil 43 with a square annular structure. It is understood that the magnetic yoke 21 and the metal bracket 1 can also be arranged in a square structure, with the magnetic circuit system 2 and the vibration system 4 respectively mounted on the upper and lower sides of the metal bracket 1, so that the overall structure of the speaker is square. Optionally, the magnetic circuit system 2, the vibration system 4, and the metal bracket 1 can also be arranged in a circular shape, so that the overall structure of the speaker is circular. In addition, the magnetic circuit system 2, the vibration system 4, and the metal bracket 1 can also be arranged in other shapes, which are not limited here.

[0034] like Figure 2 and Figure 4 As shown, the diaphragm assembly 41 includes a diaphragm 44 and a dome 45. The dome 45 is located between the diaphragm 44 and the magnetic circuit system 2, and is connected to the diaphragm 44. The outer edge of the diaphragm 44 is connected to the metal support 1. The inner voice coil 42 and the outer voice coil 43 are respectively connected to the inner and outer sides of the dome 312. Figure 7 As shown, the dome 45 has a ring-shaped structure. The inner side of the dome 45 is recessed towards the magnetic circuit system 2 to form a connecting plane 456, and the outer side of the dome 45 is bent towards the magnetic circuit system 2 to form a connecting sidewall 457. The inner voice coil 42 is connected to the connecting plane 456, and the outer voice coil 43 is connected to the connecting sidewall 457. Optionally, the inner voice coil 42, the outer voice coil 43, and the dome 45 can be fixed together by adhesive, or they can be connected by mechanical means or injection molding, etc., which are not limited here.

[0035] In one embodiment, the diaphragm 44 and the dome 45 may be an integrally molded structure, thereby ensuring the vibration performance and structural strength of the diaphragm assembly 41. Alternatively, the diaphragm 44 and the dome 45 may be connected by adhesive bonding or integral injection molding.

[0036] The connecting sidewall 457 and the connecting plane 456 are respectively positioned along the vibration direction to correspond to the first magnetic gap 25 and the second magnetic gap 26, allowing the outer voice coil 43 and the inner voice coil 42 to be inserted and suspended within the first magnetic gap 25 and the second magnetic gap 26, thus completing the installation of the relative positions of the voice coils and the magnetic field. The simultaneous connection of the inner voice coil 42 and the outer voice coil 43 to the dome 45 allows the inner voice coil 42 and the outer voice coil 43 to simultaneously drive the dome 45 to vibrate the diaphragm 44 through two different magnetic field environments, improving the acoustic performance of the loudspeaker.

[0037] like Figure 4As shown, the diaphragm assembly 41 includes two spaced-apart first conductive blocks 411 and second conductive blocks 412. Specifically, the first conductive blocks 411 and second conductive blocks 412 are disposed on the dome 45. The inner voice coil 42 and the outer voice coil 43 can be electrically connected through the first conductive blocks 411 and second conductive blocks 412. When the inner voice coil 42 and the outer voice coil 43 are fixedly connected to the dome 45, their leads can be connected through the first conductive blocks 411 and second conductive blocks 412. Thus, the first conductive part 5 electrically connects the first conductive block 411 to the inner magnet part 24, achieving electrical connection between the inner voice coil 42, the outer voice coil 43, and the inner magnet part 24; the second conductive part 6 electrically connects the second conductive block 412 to the metal bracket 1, achieving electrical connection between the inner voice coil 42, the outer voice coil 43, and the metal bracket 1.

[0038] In this embodiment, the first conductive block 411 and the second conductive block 412 can be formed by curing conductive adhesive. Specifically, the dome 45 is provided with a first connecting hole 454 and a second connecting hole 455 at intervals, preferably holes that penetrate the upper and lower surfaces. The conductive adhesive is filled in the first connecting hole 454 and the second connecting hole 455, and the first conductive block 411 and the second conductive block 412 are fixedly formed respectively. The leads of the inner voice coil 42 and the leads of the outer voice coil 43 are connected in parallel or in series on the side of the first conductive block 411 and the second conductive block 412 closest to the magnetic circuit system 2.

[0039] The first conductive part 5 is disposed on the diaphragm 44 and both ends of the first conductive part 5 extend to be electrically connected to the first conductive block 411 and the inner magnetic part 24, respectively. The second conductive part 6 is disposed on the diaphragm 44 and both ends of the second conductive part 6 extend to be electrically connected to the second conductive block 412 and the metal bracket 1, respectively.

[0040] like Figure 5 As shown, the diaphragm 44 includes a first folded ring portion 441, a second folded ring portion 442, and two connecting portions 443. The first folded ring portion 441 is arranged around the outside of the second folded ring portion 442, and the two connecting portions 443 are symmetrically arranged and connected between the first folded ring portion 441 and the second folded ring portion 442. The dome 45 is an annular structure, arranged around the outside of the inner magnetic portion 24. The first folded ring portion 441 is connected to the outside of the dome 45 and is connected to the side of the metal support 1 away from the magnetic circuit system 2. The second folded ring portion 442 is connected to the inside of the dome 45 and is connected to the inner magnetic portion 24. The two connecting portions 443 are located on the dome 45.

[0041] The first conductive part 5 is disposed on the second folded ring part 442 and the connecting part 443 corresponding to the first conductive block 411, and the second conductive part 6 is disposed on the first folded ring part 441 and the connecting part 443 corresponding to the second conductive block 412.

[0042] In one embodiment, the first folded ring portion 441, the second folded ring portion 442, and the two connecting portions 443 of the diaphragm 44 can be selected as an integrally molded structure, thereby ensuring the vibration performance and structural strength of the diaphragm 44. For example, the first folded ring portion 441, the second folded ring portion 442, and the two connecting portions 443 of the diaphragm 44 can be made of the same material as integrally molded structural components, and can be selected according to actual usage requirements. Optionally, the dome 45, the first folded ring portion 441, and the second folded ring portion 442 can be in the form of a square ring structure or a circular ring structure.

[0043] In this embodiment, the first folded ring portion 441 and the second folded ring portion 442 have an upwardly convex bulge structure or a downwardly concave concave structure, which is not limited here. Optionally, the concave directions of the first folded ring portion 441 and the second folded ring portion 442 are opposite. In this embodiment, the first folded ring portion 441 protrudes towards the side closer to the magnetic circuit system 2, and the second folded ring portion 442 protrudes towards the side farther away from the magnetic circuit system 2.

[0044] In this embodiment, the outer periphery of the dome 45 forms a first stepped surface 451, the inner periphery of the dome 45 forms a second stepped surface 452, and the dome 45 is provided with two third stepped surfaces 453 that respectively connect the first stepped surface 451 and the second stepped surface 452. The two third stepped surfaces 453 are symmetrically arranged on both sides of the dome 45, such as... Figure 7 As shown. The first folded ring portion 441 includes a first folded ring 4411, a first inner fixing portion 4412, and a first outer fixing portion 4413. The first inner fixing portion 4412 and the first outer fixing portion 4413 extend perpendicular to the vibration direction and are formed on the inner and outer sides of the first folded ring 4411, respectively. Figure 5 As shown. The second folded ring portion 442 includes a second folded ring 4421, a second inner fixing portion 4422, and a second outer fixing portion 4423. The second inner fixing portion 4422 and the second outer fixing portion 4423 extend perpendicularly to the vibration direction and are formed on the inner and outer sides of the second folded ring 4421, respectively. Figure 5 As shown. The connecting part 443 connects the first inner fixing part 4412 and the second outer fixing part 4423. The first inner fixing part 4412 is connected to the first stepped surface 451, the second outer fixing part 4423 is connected to the second stepped surface 452, and the connecting part 443 is connected to the third stepped surface 453. The first outer fixing part 4413 is connected to the metal bracket 1, and the second inner fixing part 4422 is connected to the inner magnetic part 24.

[0045] In this embodiment, the first fold ring 4411 and the second fold ring 4421 have an upwardly convex hull structure or a downwardly concave structure, which is not limited here. Optionally, the concave directions of the first fold ring 4411 and the second fold ring 4421 are opposite. In one implementation, the first fold ring 4411 protrudes towards the side closer to the magnetic circuit system 2, and the second fold ring 4421 protrudes towards the side farther away from the magnetic circuit system 2.

[0046] Understandably, the dome 45 is bonded to the diaphragm 44, specifically through an insulating adhesive layer, to prevent short circuits between the inner voice coil 42 and the outer voice coil 43. By forming a first stepped surface 451 on the outer periphery of the dome 45, the first stepped surface 451 is recessed towards the direction close to the magnetic circuit system 2, thereby ensuring that the first inner fixing part 4412 of the first folded ring 441 overlaps the first stepped surface 451. When the first inner fixing part 4412 is bonded to the first stepped surface 451, the side of the first inner fixing part 4412 facing away from the first stepped surface 451 is flush with the dome 45, thereby making the assembly structure more compact and ensuring the vibration performance of the entire diaphragm assembly 41. Meanwhile, by forming a second stepped surface 452 on the inner periphery of the dome 45, and making the second stepped surface 452 concave towards the direction of the magnetic circuit system 2, it is ensured that when the second outer fixing part 4423 of the second folded ring part 442 overlaps the second stepped surface 452 and is bonded to the second stepped surface 452, the side of the second outer fixing part 4423 facing away from the second stepped surface 452 is flush with the dome 45, thereby making the assembly structure more compact and saving vibration space. Simultaneously, by forming a third stepped surface 453 on the dome 45, and making the third stepped surface 453 concave towards the direction of the magnetic circuit system 2, it is ensured that when the connecting part 443 overlaps the third stepped surface 453 and is bonded to the third stepped surface 453, the side of the connecting part 443 facing away from the third stepped surface 453 is flush with the dome 45, thereby making the assembly structure more compact and saving vibration space.

[0047] The dome 45 can be made of metal or fiber. For example, when the dome 45 is made of metal such as aluminum alloy, it can be easily stamped.

[0048] In this embodiment, the metal bracket 1 is used to install, fix, and support components such as the magnetic circuit system 2 and the vibration system 4; that is, the metal bracket 1 provides a mounting base for components such as the magnetic circuit system 2 and the vibration system 4. It is understood that the metal bracket 1 can be a single integral structure or formed by multiple separate structures, and this is not limited here. In this embodiment, the metal bracket 1 can be a square frame or a frame structure, that is, the metal bracket 1 has a cavity with openings at both ends. The magnetic circuit system 2 and the vibration system 4 are respectively connected to the two sides of the metal bracket 1 and are arranged opposite to each other, so that the magnetic circuit system 2, the metal bracket 1, and the diaphragm assembly 41 of the vibration system 4 enclose and form a vibration cavity. In this embodiment, the metal bracket 1 is used to fix the vibration system 4 and the magnetic circuit system 2, etc., so that the loudspeaker can be used as an independent component in electronic devices, and this is not limited here.

[0049] In this embodiment, the metal support 1 is electrically conductive. For example... Figure 6As shown, a first conductive portion 5 and a second conductive portion 6 spaced apart from each other are provided on the diaphragm 44, preferably formed on the diaphragm 44 by spraying. The first conductive portion 5 and the second conductive portion 6 are sprayed and disposed on the side of the diaphragm 44 facing the magnetic circuit system 2. The first conductive portion 5 can electrically connect the inner voice coil 42, the outer voice coil 43 and the inner magnet 24, and the second conductive portion 6 can electrically connect the inner voice coil 42, the outer voice coil 43 and the metal bracket 1.

[0050] Specifically, the first conductive block 411 and the second conductive block 412 are respectively located at the two third step surfaces 453, that is, below the two connecting parts 443. The two third step surfaces 453 are respectively provided with a first connecting hole 454 and a second connecting hole 455. After the conductive adhesive is poured into the first connecting holes 454 and the second connecting holes 455 and cured, the first conductive block 411 and the second conductive block 412 are formed. The first conductive block 411 and the second conductive block 412 can extend from the upper and lower sides of the third step surface 453, respectively. The lower end face of the first conductive block 411 and the lower end face of the second conductive block 412 can be electrically connected to the inner voice coil 42 and the outer voice coil 43. The two ends of the first conductive part 5 are electrically connected to the upper end face of the first conductive block 411 and the inner magnetic part 24, respectively. The two ends of the second conductive part 6 are electrically connected to the upper end face of the second conductive block 412 and the metal bracket 1, respectively. The inner magnetic part 24 is electrically connected to the external circuit, and the metal bracket 1 is connected to the magnetic yoke 21. Thus, the current can flow into the inner voice coil 42 and the outer voice coil 43 through the inner magnetic part 24 and the first conductive part 5. Then the current flows from the second conductive part 6 to the metal bracket 1 and then to the magnetic yoke 21.

[0051] In this embodiment, the first conductive portion 5 includes a first bent section 51, a first connecting section 52, and a second connecting section 53. The first connecting section 52 and the second connecting section 53 are connected to both sides of the first bent section 51, as shown below. Figure 6 As shown. The first curved section 51 is sprayed onto the raised surface of the second folded ring portion 442; the first connecting section 52 is sprayed onto the outer side of the second folded ring portion 442 (i.e., the second outer fixing portion 4423) and the connecting portion 443; and the second connecting section 53 is sprayed onto the inner side of the second folded ring portion 442 (i.e., the second inner fixing portion 4422). The first connecting section 52 can cover the first conductive block 411, and the second connecting section 53 covers the inner magnetic portion 24. Thus, after passing through the inner magnetic portion 24, the external current can sequentially flow through the first conductive portion 511 and the first conductive block 411 into the inner voice coil 42 and the outer voice coil 43.

[0052] In this embodiment, the second conductive portion 6 includes a second bent section 61, a third connecting section 62, and a fourth connecting section 63. The third connecting section 62 and the fourth connecting section 63 are connected to both sides of the second bent section 61, as shown below. Figure 6As shown. The second curved section 61 is sprayed onto the raised surface of the first folded ring portion 441; the third connecting section 62 is sprayed onto the inner side of the first folded ring portion 441 (i.e., the first inner fixing portion 4412) and the connecting portion 443; and the fourth connecting section 63 is sprayed onto the outer side of the first folded ring portion 441 (i.e., the first outer fixing portion 4413). The third connecting section 62 covers the second conductive block 412, and the fourth connecting section 63 covers the metal bracket 1. Thus, after the current flows out from the inner voice coil 42 and the outer voice coil 43, it can sequentially flow through the second conductive block 412 and the second conductive portion 6 into the metal bracket 1, and then to the magnetic yoke 21.

[0053] Optionally, the second conductive part 6 and the metal bracket 1 can be physically and electrically connected by conductive adhesive.

[0054] The first conductive part 5 and the second conductive part 6 are composite conductive materials (such as nano-silver wire conductive materials), which are composed of conductive particles uniformly dispersed within a conductive substrate. In this embodiment, the conductive substrate is made of the same material as the diaphragm 44, making it easy to bond the first conductive part 5 and the second conductive part 6 to the diaphragm 44. The conductive particles are one or more of gold, silver, copper, zinc, and graphite, and have a linear structure and / or a sheet structure, which gives the first conductive part 5 and the second conductive part 6 a smaller and more stable resistivity, reducing the risk of overheating of the first conductive part 5 and the second conductive part 6, reducing energy loss, and increasing energy utilization.

[0055] In this embodiment, the magnetic yoke 21 is located below the metal support 1 and is connected to the metal support 1, allowing current to flow through the metal support 1 into the magnetic yoke 21. Specifically, the corners of the magnetic yoke 21 are bent upwards to form connecting pieces 211, and the metal support 1 is provided with insertion holes 11, with the connecting pieces 211 corresponding to the insertion holes 11. The magnetic yoke 21 achieves contact connection with the metal support 1 by inserting the connecting pieces 211 into the insertion holes 11.

[0056] In this embodiment, the magnetic yoke 21 has a square structure, and the metal support 1 has a square ring structure. The four corners of the magnetic yoke 21 are bent upward to form four connecting pieces 211, and the four corners of the metal support 1 are respectively provided with insertion holes 11. The four connecting pieces 211 of the magnetic yoke 21 are respectively inserted into the four insertion holes 11, thereby realizing the connection between the magnetic yoke 21 and the metal support 1.

[0057] The magnetic yoke 21 has a through hole 212, specifically located at the center. The inner magnetic part 24 is fixed to the magnetic yoke 21 and located directly above the through hole 212. A conductive sheet 3 is connected to the bottom surface of the inner magnetic part 24. The conductive sheet 3 is located inside the through hole 212, and there is a gap between the conductive sheet 3 and the side wall of the through hole 212. The conductive sheet 3 is used for electrical connection with an external circuit, thereby allowing current to reach the inner magnetic part 24 through the conductive sheet 3.

[0058] like Figure 1 and Figure 2 As shown, the loudspeaker also includes a first insulating portion 7 and a second insulating portion 8. The first insulating portion 7 is disposed between the inner magnetic portion 24 and the yoke 21, and surrounds the outside of the through-hole 212. The first insulating portion 7 insulates the inner magnetic portion 24 from the yoke 21, allowing current to flow from the inner magnetic portion 24 through the first conductive portion 5 to the inner voice coil 42 and the outer voice coil 43. The second insulating portion 8 is disposed on the side of the yoke 21 away from the inner magnetic portion 24, and surrounds the outside of the through-hole 212. The second insulating portion 8 insulates the yoke 21 from other structures of the electronic device.

[0059] In this embodiment, the inner magnetic part 24 includes a first inner magnet 241, an inner pole piece 242, and a second inner magnet 243 stacked sequentially from top to bottom. Conductive layers 244 are disposed between the first inner magnet 241 and the inner pole piece 242, and between the inner pole piece 242 and the second inner magnet 243. A conductive sheet 3 is attached to the underside of the second inner magnet 243. Figure 2 and Figure 3 As shown. The conductive sheet 3 carries the external current through the second inner magnet 243, the inner pole piece 242, and the first inner magnet 241 to the first conductive part 5. The middle magnetic part 23 includes a middle pole piece 231 and a middle magnet 232 stacked sequentially from top to bottom. The middle pole piece 231 and the middle magnet 232 are arranged in a ring and surround the outside of the inner magnetic part 24. The outer magnetic part 22 includes an outer magnet 221 with a ring structure. The outer magnet 221 is disposed between the magnetic yoke 21 and the metal support 1, as shown. Figure 1 and Figure 2 As shown. Current flows from the second conductive part 6 to the metal bracket 1, and then the current can flow directly from the metal bracket 1 to the magnetic yoke 21 or through the outer magnet 221 to the magnetic yoke 21. The outer magnet 221 has notches at its corners to avoid the connecting piece 211.

[0060] In this embodiment, the inner voice coil 42 and the outer voice coil 43 can be connected in parallel or in series via the first conductive block 411 and the second conductive block 412. Preferably, the inner voice coil 42 and the outer voice coil 43 are connected in parallel, enabling single-signal parallel driving, increasing power, reducing overall impedance, and meeting system requirements. When there is a greater impedance requirement, the inner voice coil 42 and the outer voice coil 43 can be connected in series to improve impedance matching.

[0061] Understandably, loudspeakers are used in electronic devices, such as smartwatches, mobile phones, speakers, computers, headphones, or televisions, etc., without limitation. The electronic device includes a housing and a loudspeaker, with the loudspeaker housed within the housing. The loudspeaker can be electrically connected to the main circuit board of the electronic device, thereby supplying power to the inner voice coil 42 and the outer voice coil 43. It should be noted that the metal bracket 1 of the loudspeaker can be a separate structure from the outer shell or enclosure of the electronic device. In this case, the metal bracket 1 integrates the magnetic circuit system 2 and the vibration system 4 of the loudspeaker into a single structure, facilitating assembly and disassembly. Alternatively, the metal bracket 1 of the loudspeaker can be integrally molded with the housing of the electronic device, which effectively improves structural strength and sealing performance.

[0062] This embodiment replaces the conventional lead wire or FPC connection of the voice coil with a conductive part on the diaphragm 44, and makes full use of the entire magnetic circuit (magnetic yoke 21 and inner magnet 24) and metal bracket 1 for circuit conduction, so as to have more space to increase the magnet volume and enhance the magnetic induction intensity.

[0063] Furthermore, in this embodiment, the inner voice coil 42 and the outer voice coil 43 of the loudspeaker are simultaneously connected to the diaphragm assembly 41 and are respectively suspended in different magnetic gaps. The inner voice coil 42 and the outer voice coil 43 jointly drive the same diaphragm assembly 41 through a strong magnetic field region, improving the equivalent driving force and high-frequency acoustic performance, while also enhancing overall rigidity and heat dissipation efficiency. Specifically, the loudspeaker is configured with an inner voice coil 42 and an outer voice coil 43 arranged inside and outside, reducing the size of the magnetic gap and greatly enhancing the magnetic induction intensity. The inner voice coil 42 and the outer voice coil 43 are mounted on the diaphragm assembly 41 to form a U-shaped vibration structure, which greatly enhances its overall rigidity and improves high-frequency performance. In addition, the large overall surface area of ​​the inner voice coil 42 and the outer voice coil 43 increases heat dissipation efficiency.

[0064] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A loudspeaker, characterized by The loudspeaker includes: Metal bracket; A magnetic circuit system is connected below the metal bracket. The magnetic circuit system includes a magnetic yoke and a magnetic assembly disposed on the magnetic yoke. The magnetic yoke is electrically connected to the metal bracket. A magnetic gap is formed in the magnetic assembly. The magnetic yoke is provided with a through hole. A conductive sheet is located inside the through hole. One end of the conductive sheet is connected to the magnetic assembly, and the other end of the conductive sheet is used for electrical connection with an external circuit. A vibration system is connected above the metal bracket. The vibration system includes a diaphragm assembly and at least one voice coil. One end of the voice coil is connected to the diaphragm assembly, and the other end of the voice coil is suspended in the magnetic gap. The diaphragm assembly is provided with a first conductive part and a second conductive part spaced apart from each other. The first conductive part is electrically connected to the voice coil and the magnet assembly, and the second conductive part is electrically connected to the voice coil and the metal bracket.

2. The loudspeaker according to claim 1, characterized in that, The magnetic assembly includes an annular outer magnetic part, an annular middle magnetic part, and an inner magnetic part. The outer magnetic part is arranged around the outside of the middle magnetic part, and the inner magnetic part is arranged inside the middle magnetic part. A first magnetic gap is formed between the outer magnetic part and the middle magnetic part, and a second magnetic gap is formed between the middle magnetic part and the inner magnetic part. The vibration system includes an inner voice coil and an outer voice coil. One end of the outer voice coil and one end of the inner voice coil are both connected to the diaphragm assembly. The outer voice coil is arranged around the outside of the inner voice coil. The other end of the outer voice coil is suspended in the first magnetic gap, and the other end of the inner voice coil is suspended in the second magnetic gap.

3. The loudspeaker according to claim 2, characterized in that, One end of the conductive sheet is electrically connected to the inner magnetic part, the first conductive part is electrically connected to the inner voice coil, the outer voice coil and the inner magnetic part, and the second conductive part is electrically connected to the inner voice coil, the outer voice coil and the metal bracket.

4. The loudspeaker according to claim 3, characterized in that, The diaphragm assembly has two spaced-apart first conductive blocks and second conductive blocks. The inner voice coil and the outer voice coil are electrically connected through the first conductive blocks and the second conductive blocks. The first conductive part is electrically connected to the first conductive block and the inner magnetic part, and the second conductive part is electrically connected to the second conductive block and the metal bracket.

5. The loudspeaker according to claim 4, characterized in that, The diaphragm assembly includes a diaphragm and a dome, the dome being connected to the side of the diaphragm facing the magnetic circuit system, and the dome being provided with a first connection hole and a second connection hole at intervals; The first conductive block is disposed in the first connecting hole, and the second conductive block is disposed in the second connecting hole.

6. The loudspeaker according to claim 5, characterized in that, The first conductive part is disposed on the diaphragm and its two ends extend to be electrically connected to the first conductive block and the inner magnetic part, respectively. The second conductive part is disposed on the diaphragm and its two ends extend to be electrically connected to the second conductive block and the metal bracket, respectively.

7. The loudspeaker according to claim 6, characterized in that, The dome has a ring structure and is arranged around the outside of the inner magnetic part; The diaphragm includes a first folded ring portion, a second folded ring portion, and two connecting portions. The first folded ring portion is arranged around the outside of the second folded ring portion. The two connecting portions are symmetrically arranged and connected between the first folded ring portion and the second folded ring portion. The first folded ring portion is located on the outside of the dome and is connected to the metal bracket. The second folded ring portion is located on the inside of the dome and is connected to the inner magnet portion. The two connecting portions are located on the dome.

8. The loudspeaker according to claim 7, characterized in that, The first connecting hole and the second connecting hole are provided in a one-to-one correspondence with the two connecting parts.

9. The loudspeaker according to claim 2, characterized in that, The loudspeaker further includes a first insulating portion and a second insulating portion. The first insulating portion is disposed between the inner magnetic portion and the magnetic yoke and surrounds the outside of the through hole. The second insulating portion is disposed on the side of the magnetic yoke away from the inner magnetic portion and surrounds the outside of the through hole.

10. The loudspeaker according to claim 1, characterized in that, The magnetic yoke has multiple connecting pieces bent upwards at its corners, and the metal bracket has multiple insertion holes. Each connecting piece and each insertion hole are physically and electrically connected.

11. The loudspeaker according to claim 2, characterized in that, The inner magnetic part includes a first inner magnet, an inner pole piece, and a second inner magnet stacked sequentially from top to bottom. A conductive layer is provided between the first inner magnet and the inner pole piece, and between the inner pole piece and the second inner magnet. The conductive piece is attached to the bottom of the second inner magnet.

12. The loudspeaker according to claim 2, characterized in that, The central magnetic section includes a central pole piece and a central magnet stacked sequentially from top to bottom, and the central pole piece and the central magnet are arranged in a ring.

13. The loudspeaker according to claim 2, characterized in that, The outer magnetic part includes an outer magnet with a ring structure, which is disposed between the magnetic yoke and the metal support.

14. The loudspeaker according to claim 5, characterized in that, The inner side of the dome is recessed towards the magnetic circuit system to form a connecting plane, and the outer side of the dome is bent towards the magnetic circuit system to form a connecting sidewall. The inner voice coil is connected to the connecting plane, and the outer voice coil is connected to the connecting sidewall.

15. An electronic device, characterized in that, The electronic device includes: case; The loudspeaker as claimed in any one of claims 1 to 14, wherein the loudspeaker is disposed within the housing.

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