Sound production apparatus and electronic device

Abstract

The present application provides a sound production apparatus and an electronic device. The sound production apparatus comprises a housing, a magnetic circuit assembly, a vibration assembly, and a spider. The magnetic circuit assembly has a first magnetic gap and a second magnetic gap. The vibration assembly comprises a diaphragm component and a voice coil component. The voice coil component comprises a first voice coil disposed corresponding to the first magnetic gap and a second voice coil disposed corresponding to the second magnetic gap. The spider is electrically connected to the voice coil component and an external circuit. The spider comprises a connection arm, a bent arm, and a vibration arm connected in sequence. The connection arm is disposed on the diaphragm component and is electrically connected to the first voice coil and the second voice coil. The vibration arm extends in a bent shape. The bent arm is connected between the connection arm and the vibration arm, and the bent arm extends from an inner end of the vibration arm along a vibration direction of the vibration assembly and is connected to the connection arm. This configuration improves the magnetic field strength of the magnetic circuit assembly, thereby increasing the BL value of the sound production apparatus and ensuring the acoustic performance of the sound production apparatus.

Description

Sound-generating devices and electronic equipment Technical Field

[0001] This application belongs to the field of electroacoustic transduction technology, specifically, this application relates to a sound-generating device and an electronic device. Background Technology

[0002] As crucial electroacoustic transducers, sound-generating devices ensure the sound output of electronic devices such as speakers, handsets, headphones, and mobile phones. With advancements in electronic device performance, improvements in the acoustic performance of sound-generating devices are inevitable. To achieve better acoustic performance, sound-generating devices often require larger magnetic circuit systems with stronger magnetic fields.

[0003] In related technologies, sound-generating devices typically use centering supports at the four corners or the short axis of the sound-generating device. While this allows for the connection and positioning of the voice coil, the centering supports occupy space in the magnetic circuit system, reduce the magnetic field strength of the magnetic circuit system, and affect the acoustic performance of the sound-generating device. Summary of the Invention

[0004] One objective of this application is to provide a new technical solution for a sound-generating device and an electronic device.

[0005] According to a first aspect of the embodiments of this application, a sound-generating device is provided, comprising:

[0006] case;

[0007] A magnetic circuit assembly is disposed within the housing. The magnetic circuit assembly includes a magnetic yoke and a central magnetic portion, a first side magnetic portion, and a second side magnetic portion disposed on the magnetic yoke. The first side magnetic portion is disposed around the central magnetic portion and forms a first magnetic gap with the central magnetic portion. The second side magnetic portion is disposed around the first side magnetic portion and forms a second magnetic gap with the first side magnetic portion.

[0008] A vibration assembly, comprising a diaphragm component and a voice coil component, the diaphragm component being connected to the housing, and the voice coil component comprising a first voice coil and a second voice coil, the first voice coil being connected to the diaphragm component and suspended in a first magnetic gap, and the second voice coil being connected to the diaphragm component and suspended in a second magnetic gap; and

[0009] A centering support is provided, which is electrically connected to the voice coil component and an external circuit. The centering support includes a connecting arm, a bent arm, and a vibrating arm connected in sequence. The connecting arm is disposed on the diaphragm component and electrically connected to the first voice coil and the second voice coil. The outer end of the vibrating arm is connected to the housing and extends inward in a bent shape. The bent arm is connected between the connecting arm and the vibrating arm and extends from the inner end of the vibrating arm along the vibration direction of the vibration assembly and is connected to the connecting arm.

[0010] Optionally, the connecting arm and the vibrating arm are located on different planes, and a second avoidance structure is formed on the outer periphery of the second side magnet to avoid the vibrating arm.

[0011] Optionally, the first side magnetic part includes a first side magnet and a first side magnetic plate, with the first side magnet sandwiched between the first side magnetic plate and the magnetic yoke;

[0012] The first side magnet forms a closed ring structure; or,

[0013] There are multiple first-side magnets, and adjacent first-side magnets are connected end-to-end to form a closed ring structure; or,

[0014] The first side magnet includes a plurality of first sub-magnets, and a first airflow gap is formed between adjacent first sub-magnets. The first airflow gap connects the first magnetic gap and the second magnetic gap.

[0015] Optionally, the first side magnetic plate is provided with a first clearance structure, the first clearance structure including a first clearance groove formed by a recess on the side of the first side magnetic plate away from the first side magnet and / or a clearance hole penetrating the first side magnetic plate, the first clearance structure being used to avoid the connecting arm of the centering support plate and / or the lead wire of the voice coil component.

[0016] Optionally, the second side magnetic part includes a second side magnet and a second side magnetic plate, with the second side magnet sandwiched between the second side magnetic plate and the magnetic yoke;

[0017] The second side magnet forms a closed ring structure; or,

[0018] The second side magnet consists of multiple magnets, with adjacent second side magnets connected end-to-end to form a closed ring structure; or,

[0019] The second side magnet includes a plurality of second sub-magnets, and a second airflow gap is formed between adjacent second sub-magnets. The second airflow gap connects the second magnetic gap and the space outside the sound-generating device.

[0020] Optionally, the centering support includes two, and the two centering supports are disposed on both sides of the long axis of the magnetic circuit assembly;

[0021] The second side magnetic part includes a second side magnet and a second side magnetic plate, with the second side magnet sandwiched between the second side magnetic plate and the magnetic yoke;

[0022] The second side magnet includes short side magnets located on both sides of the long axis of the magnetic circuit assembly, and long side magnets located on both sides of the short axis of the magnetic circuit assembly, wherein the second clearance structure is at least partially formed on the outer periphery of the short side magnets.

[0023] Optionally, each of the centering supports includes two vibrating arms disposed at the two ends corresponding to the two ends of the short side magnet, and the two vibrating arms are respectively connected to the two ends of the connecting arm by a bent arm;

[0024] Both ends of the short-side magnet are provided with a second clearance groove corresponding to the vibrating arm on the side facing the housing, and the second clearance groove forms part of the second clearance structure.

[0025] Optionally, the connecting arm includes a U-shaped portion with the opening of the U-shaped portion facing the housing. The U-shaped portion includes a first arm that is connected to the two bent arms respectively and a second arm that connects the two first arms. The second arm is located between the first voice coil and the second voice coil, and the second arm is provided with a pad for connecting the first voice coil and the second voice coil.

[0026] Optionally, one of the connecting arms has two pads on its second arm that are electrically connected to the lead-in end of the first voice coil and the lead-out end of the second voice coil.

[0027] One of the connecting arms has two pads on its second arm that are electrically connected to the lead-out end of the first voice coil and the lead-in end of the second voice coil.

[0028] Optionally, the short-side magnet includes a protrusion located between the two second clearance slots, the outer wall surface of the protrusion being exposed on the outer wall surface of the housing; or the outer wall surface of the protrusion being flush with the outer wall surface of the housing.

[0029] And / or, the short-side magnet includes a protrusion located between the two second clearance slots, and the two bent arms of the same centering support are disposed at two end faces of the protrusion along the short axis direction of the magnetic circuit assembly.

[0030] And / or, the ends of the two vibrating arms of each of the centering supports are fixed to the corners of the housing.

[0031] Optionally, the second side magnetic plate is provided with a hollow portion that constitutes at least part of the second avoidance structure.

[0032] Optionally, the hollow portion includes a first hollow portion opposite to the vibrating arm and a second hollow portion opposite to the bending arm, the first hollow portion and the second hollow portion are connected, and the second hollow portion penetrates the inner wall surface of the second magnetic plate.

[0033] Optionally, the second magnetic plate portion enclosed by the inner sides of the first and second hollow portions forms a magnetic extension portion, and the two magnetic extension portions cover both ends of the short side magnet.

[0034] Optionally, the second side magnet includes a plurality of second sub-magnets, and a second airflow gap is formed between adjacent second sub-magnets, the hollow portion being connected to the second airflow gap.

[0035] Optionally, the diaphragm component includes a diaphragm and a dome, the diaphragm being connected to the housing, the dome being connected to the diaphragm, the first voice coil and the second voice coil being connected to the dome, and the connecting arm being connected to the dome.

[0036] Optionally, the dome is provided with an extension arm that bends toward the vibrating arm. The extension arm is connected to the vibrating arm, and there are multiple extension arms, each corresponding to one of the vibrating arms.

[0037] According to a second aspect of the embodiments of this application, an electronic device is provided, which includes the sound-generating device described in the first aspect.

[0038] One technical advantage of this application is:

[0039] This application provides a sound-generating device, which includes a housing, a magnetic circuit assembly, a vibration assembly, and a centering support. The centering support includes a connecting arm, a bent arm, and a vibrating arm. The connecting arm is disposed on the diaphragm component and electrically connected to a first voice coil and a second voice coil. The vibrating arm extends in a bent shape, and the bent arm is connected between the connecting arm and the vibrating arm. The bent arm extends from the inner end of the vibrating arm along the vibration direction of the vibration assembly and is connected to the connecting arm. This increases the magnetic field strength of the magnetic circuit assembly, thereby increasing the BL value of the sound-generating device and ensuring the acoustic performance of the sound-generating device.

[0040] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0041] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present application and, together with their description, serve to explain the principles of the present application.

[0042] Figure 1 is a perspective view of a sound-generating device according to an embodiment of this application;

[0043] Figure 2 is a perspective view of a sound-generating device according to an embodiment of this application;

[0044] Figure 3 is an exploded view of a sound-generating device according to an embodiment of this application;

[0045] Figure 4 is a schematic diagram of a centering support plate of a sound-generating device according to an embodiment of this application;

[0046] Figure 5 is a front view of the voice coil component connection of a sound-generating device according to an embodiment of this application;

[0047] Figure 6 is a schematic diagram of the back connection of the voice coil component of a sound-generating device according to an embodiment of this application;

[0048] Figure 7 is a schematic diagram of the first side magnetic plate of a sound-generating device according to an embodiment of this application;

[0049] Figure 8 is a schematic diagram of the front connection of the second side magnetic plate of a sound-generating device according to an embodiment of this application;

[0050] Figure 9 is a schematic diagram of the back connection of the second side magnetic plate of a sound-generating device according to an embodiment of this application;

[0051] Figure 10 is a schematic diagram of the magnet in the magnetic circuit assembly of a sound-generating device according to an embodiment of this application;

[0052] Figure 11 is a front view of a sound-generating device according to an embodiment of this application;

[0053] Figure 12 is a cross-sectional view along plane AA in Figure 11;

[0054] Figure 13 is a cross-sectional view along the BB plane in Figure 11;

[0055] Figure 14 is a magnified view of a portion of Figure 13;

[0056] Figure 15 is a cross-sectional view along the CC plane in Figure 11.

[0057] The components include: 1. Shell; 11. Annular shell; 12. Opening; 2. Magnetic circuit assembly; 21. Central magnetic part; 211. Central magnet; 212. Central magnetic guide plate; 22. First side magnetic part; 221. First side magnet; 222. First side magnetic guide plate; 223. First clearance structure; 23. Second side magnetic part; 231. Second side magnet; 232. Second side magnetic guide plate; 2321. Magnetic guide extension; 233. Second clearance structure; 2331. Hollowed-out part; 2331′. First hollowed-out part; 2331”. Second hollowed-out part; 2332. Second clearance groove; 2333. Protrusion; 24. Magnetic yoke; 3. Vibration assembly; 31. Diaphragm component; 311. Diaphragm; 312. Dome; 3121. Extension arm; 32. Voice coil assembly; 321. First voice coil; 322. Second voice coil; 4. Centering support; 401. Connecting arm; 402. Bending arm; 403. Vibrating arm; 4′. First centering support; 401′. First connecting arm; 402′. First bending arm; 403′. First vibrating arm; 4”. Second centering support; 401”. Second connecting arm; 402”. Second bending arm; 403”. Second vibrating arm. Detailed Implementation

[0058] Various exemplary embodiments of this application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this application.

[0059] The embodiments of this application will now be described in detail, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0060] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0061] In the description of this application, 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", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element 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 this application.

[0062] In the description of this application, it should be noted that, unless otherwise expressly 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 application based on the specific circumstances.

[0063] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0064] This application provides a sound-generating device that can be applied to electronic devices.

[0065] Referring to Figures 1 to 3, an embodiment of this application provides a sound-generating device, which includes:

[0066] Casing 1;

[0067] Magnetic circuit assembly 2 is disposed inside housing 1. Magnetic circuit assembly 2 includes magnetic yoke 24 and a central magnetic part 21, a first side magnetic part 22 and a second side magnetic part 23 disposed on magnetic yoke 24. The first side magnetic part 22 is disposed around the central magnetic part 21 and forms a first magnetic gap with the central magnetic part 21. The second side magnetic part 23 is disposed around the first side magnetic part 22 and forms a second magnetic gap with the first side magnetic part 22.

[0068] Vibration assembly 3 includes a diaphragm component 31 and a voice coil component 32. The diaphragm component 31 is connected to the housing 1. The voice coil component 32 includes a first voice coil 321 and a second voice coil 322. The first voice coil 321 is connected to the diaphragm component 31 and suspended in a first magnetic gap. The second voice coil 322 is connected to the diaphragm component 31 and suspended in a second magnetic gap.

[0069] Centering support 4 is electrically connected to voice coil component 32 and external circuit. Centering support 4 includes a connecting arm 401, a bent arm 402 and a vibrating arm 403 connected in sequence. The connecting arm 401 is disposed on diaphragm component 31 and electrically connected to the first voice coil 321 and the second voice coil 322. The outer end of the vibrating arm 403 is connected to the housing 1 and extends inward in a bent shape. The bent arm 402 is connected between the connecting arm 401 and the vibrating arm 403 and extends from the inner end of the vibrating arm 403 along the vibration direction of the vibration component 3 and is connected to the connecting arm 401.

[0070] In this embodiment, the housing 1 is used to install, fix and support components such as the magnetic circuit assembly 2 and the vibration assembly 3. In other words, the housing 1 provides a basis for assembling components such as the magnetic circuit assembly 2 and the vibration assembly 3.

[0071] In one embodiment, the housing has an opening 12. The housing 1 can be an integral structure, such as a shell with an opening 12 on one side. The magnetic circuit assembly 2 and the vibration assembly 3 are assembled into the interior of the housing 1 through the opening 12. The diaphragm component 31 is connected to the opening 12 and can emit sound to the outside through the opening 12.

[0072] In a specific embodiment, as shown in Figures 1 and 3, the magnetic circuit assembly 2 is assembled at one end of the housing 1, and the vibration assembly 3 is connected to the other end of the housing. The magnetic circuit assembly 2 and the vibration assembly 3 are arranged opposite to each other, so that the magnetic circuit assembly 2, the housing 1 and the vibration assembly 3 enclose and form a vibration cavity.

[0073] In this embodiment, when the sound-generating device is applied to an electronic device, the electronic device may be equipped with a power supply and a circuit. The centering support is electrically connected to the voice coil component 32 and the external circuit, and is electrically connected to the power supply through the external circuit to ensure the efficiency and stability of the power supply to the voice coil component 32.

[0074] In this embodiment, the central magnetic part 21, the first side magnetic part 22, and the second side magnetic part 23 form a magnetic circuit part. The magnetic yoke 24 of the magnetic circuit assembly 2 and the magnetic circuit part are stacked on top of each other. The central magnetic part 21, the first side magnetic part 22, and the second side magnetic part 23 of the magnetic circuit assembly 2 are arranged sequentially from the inside to the outside. Based on the support provided by the magnetic yoke 24 for the central magnetic part 21, the first side magnetic part 22, and the second side magnetic part 23, the magnetic circuit assembly 2 can be connected to the housing 1 through the periphery of the outermost second side magnetic part 23 to ensure the stability of the magnetic circuit assembly 2 inside the housing 1.

[0075] In this embodiment, the first side magnet 22 is disposed outside the central magnet 21 and forms a first magnetic gap with the central magnet 21, thereby connecting one end of the first voice coil 321 to the diaphragm component 31, and the other end of the first voice coil 321 is suspended in the first magnetic gap. When current is passed through the first voice coil 321, the first voice coil 321 vibrates back and forth in the first magnetic gap formed by the magnetic circuit component 2, thus realizing the conversion between electrical energy and mechanical energy. The first voice coil 321 then drives the diaphragm component 31 to vibrate, thereby realizing the sound generation of the sound generation device.

[0076] Meanwhile, the second side magnet 23 is disposed outside the first side magnet 22 and forms a second magnetic gap with the first side magnet 22, thereby connecting one end of the second voice coil 322 to the diaphragm component 31, and the other end of the second voice coil 322 is suspended in the second magnetic gap. When current is passed through the second voice coil 322, the second voice coil 322 vibrates back and forth in the second magnetic gap formed by the magnetic circuit assembly 2, thus realizing the conversion between electrical energy and mechanical energy. The second voice coil 322 then drives the diaphragm component 31 to vibrate, thereby realizing the sound generation device. When the second voice coil 322 and the first voice coil 321 cooperate to drive the diaphragm component 31 to vibrate, the vibration frequency and vibration amplitude of the diaphragm component 31 can be increased, so that the sound generation device can work in a wider frequency range, thereby providing richer timbre and more delicate sound quality.

[0077] In this embodiment, by connecting the connecting arm 401 of the centering support plate 4 to the diaphragm component 31, that is, by welding the connecting arm 401 to the upper surface of the first voice coil 321 and the second voice coil 322, a stable electrical conduction path is provided for the first voice coil 321 and the second voice coil 322. Furthermore, the connecting arm 401 is fixed to the diaphragm component 31, and the bent arm 402 extends along the vibration direction of the vibrating component. While ensuring the stability of the centering support plate 4, this avoids the problem in the prior art where the bent arm 402 often occupies the space of the magnetic circuit component 2 due to being located in the corner area of ​​the magnetic circuit component 2 and extending horizontally. As a result, the magnetic circuit component 2 can be enlarged to increase the magnetic field strength of the magnetic circuit component 2, thereby increasing the BL value (drive strength value) of the sound-generating device and ensuring the acoustic performance of the sound-generating device.

[0078] In this embodiment, the outer end of the vibrating arm 403 is the end of the vibrating arm 403 away from the connecting arm 401, and the inner end of the vibrating arm 403 is the end of the vibrating arm 403 close to the connecting arm 401. The vibrating arm 403 extends in a bent shape in the direction from its outer end to its inner end, that is, the vibrating arm 403 has at least one bend, so as to realize the deformation of the centering support plate 4 through the vibrating arm 403, and play a centering role in the reciprocating vibration of the first voice coil 321 and the second voice coil 322 during the vibration of the diaphragm assembly.

[0079] The sound-generating device provided in this application embodiment includes a housing 1, a magnetic circuit assembly 2, and a vibration assembly 3. The magnetic circuit assembly 2 is disposed within the housing 1 and includes a magnetic yoke 24 and a central magnetic part 21, a first side magnetic part 22, and a second side magnetic part 23 disposed on the magnetic yoke 24. The first side magnetic part 22 is disposed around the central magnetic part 21 and forms a first magnetic gap with the central magnetic part 21. The second side magnetic part 23 is disposed around the first side magnetic part 22 and forms a second magnetic gap with the first side magnetic part 22. The vibration assembly 3 includes a diaphragm component 31 and a voice coil component 32. The diaphragm component 31 is connected to the housing, and the voice coil... Component 32 includes a first voice coil 321 and a second voice coil 322. The first voice coil 321 is connected to the diaphragm component 31 and suspended in the first magnetic gap. The second voice coil 322 is connected to the diaphragm component 31 and suspended in the second magnetic gap. Centering support 4 includes a connecting arm 401, a bending arm 402 and a vibrating arm 403 connected in sequence. The connecting arm 401 is disposed on the diaphragm component 31 and electrically connected to the first voice coil 321 and the second voice coil 322, thereby increasing the magnetic field strength of the magnetic circuit component 2, which can increase the BL value (driving strength value) of the sound-generating device and ensure the acoustic performance of the sound-generating device.

[0080] In some embodiments, referring to Figures 3 and 4, the connecting arm 401 and the vibrating arm 403 are located in different planes, and a second avoidance structure 233 that avoids the vibrating arm 403 is formed on the outer peripheral side of the second side magnetic part 23.

[0081] In this embodiment, the connecting arm 401 can electrically connect the leads of the first voice coil 321 and the second voice coil 322 when connected to the diaphragm component 31, so as to realize the circuit conduction from the centering support 4 to the first voice coil 321 and the second voice coil 322, and ensure the stability of current transmission of the first voice coil 321 and the second voice coil 322.

[0082] As shown in Figure 4, the vibrating arm 403 is connected to the outside of the connecting arm 401 via the bent arm 402, and the connecting arm 401 and the vibrating arm 403 are staggered, so that the bent arm 402 extends along the vibration direction of the vibrating component 3, and a second avoidance structure 233 is formed on the outer periphery of the second side magnetic part 23 to avoid the vibrating arm 403 and the bent arm 402, which makes reasonable use of the setting space and avoids mutual interference between the centering support plate 4 and the magnetic circuit component 2, thereby improving the magnet utilization rate of the magnetic circuit component 2.

[0083] In one embodiment, the first voice coil 321 and the second voice coil 322 can be connected in series through the centering support 4 to ensure the consistency of the current in the first voice coil 321 and the second voice coil 322, which facilitates the control of the current in the first voice coil 321 and the second voice coil 322. In another embodiment, the first voice coil 321 and the second voice coil 322 can be connected in parallel through the centering support 4, so that the current in the first voice coil 321 and the second voice coil 322 can be controlled independently, which improves the flexibility of the diaphragm component 31 when the first voice coil 321 and the second voice coil 322 vibrate.

[0084] In some embodiments, the centering support plate 4 includes two plates, which are symmetrically distributed along the long axis or short axis of the magnetic circuit assembly 2, thereby improving the flexibility of the arrangement of the centering support plate 4 and facilitating the use of the assembly gap inside the sound-generating device to set the centering support plate 4.

[0085] In some embodiments, referring to Figures 5, 6 and 10, the centering support 4 includes two parts, which are disposed on both sides of the long axis of the magnetic circuit assembly 2.

[0086] The second side magnetic part 23 includes a second side magnet 231 and a second side magnetic guide plate 232. The second side magnet 231 is sandwiched between the second side magnetic guide plate 232 and the magnetic guide yoke 24.

[0087] Referring to Figure 10, the second side magnet 231 includes short side magnets located on both sides of the long axis direction of the magnetic circuit assembly 2 and long side magnets located on both sides of the short axis direction of the magnetic circuit assembly 2. The second clearance structure 233 is at least partially formed on the outer periphery of the short side magnet.

[0088] In this embodiment, the second clearance structure 233 is at least partially formed on the outer periphery of the short side magnet, which facilitates the connection of the connecting arm 401 of the centering support plate 4 to the lead wire of the voice coil component 32 on the short side magnet side, reduces the extension length of the connecting arm 401 and the vibrating arm 403, further reduces the space occupied by the magnetic circuit assembly 2, and helps to reduce production costs.

[0089] In some embodiments, referring to Figures 4 to 6, each centering support 4 includes two vibrating arms 403 disposed at the two ends corresponding to the short side magnet, and the two vibrating arms 403 are respectively connected to the two ends of the connecting arm 401 through a bent arm 402.

[0090] Referring to Figure 10, both ends of the short magnet are provided with a second clearance groove 2332 corresponding to the vibrating arm 403 on the side facing the housing 1. The second clearance groove 2332 forms part of the second clearance structure 233.

[0091] In this embodiment, the connecting arm 401 is electrically connected to the leads of the first voice coil 321 and the second voice coil 322; the two vibrating arms 403 form a power path connected to the external circuit, ensuring the current transmission of the first voice coil 321 and the second voice coil 322.

[0092] In some embodiments, referring to Figures 3 to 6, the connecting arm 401 includes a U-shaped portion with the opening of the U-shaped portion facing the housing 1. The U-shaped portion includes a first arm and a second arm. The two first arms are respectively connected to two bent arms 402. The second arm connects the two first arms and is located between the first voice coil 321 and the second voice coil 322. The second arm is provided with pads for connecting the first voice coil 321 and the second voice coil 322, so that the connection of the first voice coil 321 and the second voice coil 322 can be realized through a connecting arm 401, simplifying the structure of the sound-generating device.

[0093] In some embodiments, the sound-generating device includes two centering supports 4, each centering support 4 including a connecting arm 401, see Figures 3 and 4, one of the connecting arms 401 has two pads on its second arm, one pad is electrically connected to the lead-in end of the first voice coil 321, and the other pad is electrically connected to the lead-out end of the second voice coil 322;

[0094] On the second arm of the other connecting arm 401, there are two pads. One pad is electrically connected to the lead-out end of the first voice coil 321, and the other pad is electrically connected to the lead-in end of the second voice coil 322, so as to realize the series connection of the first voice coil 321 and the second voice coil 322.

[0095] In one specific embodiment, referring to Figures 5 and 6, the centering support 4 includes a first centering support 4′ and a second centering support 4″, which are symmetrically distributed along the long axis of the magnetic circuit assembly.

[0096] The first centering support 4′ includes a first connecting arm 401′, a first bending arm 402′, and a first vibrating arm 403′. The first connecting arm 401′ is disposed on the diaphragm component 31 and electrically connected to the lead-in end of the first voice coil 321 and the lead-out end of the second voice coil 322. The first bending arm 402′ is connected between the first connecting arm 401′ and the first vibrating arm 403′, and the first bending arm 402′ and the first vibrating arm 403′ are disposed between the outer periphery of the second side magnet 23 and the housing 1.

[0097] The second centering support 4″ includes a second connecting arm 401″, a second bending arm 402″, and a second vibrating arm 403″. The second connecting arm 401″ is disposed on the diaphragm component 31 and electrically connected to the lead-out end of the first voice coil 321 and the lead-in end of the second voice coil 322. The second bending arm 402″ is connected between the second connecting arm 401″ and the second vibrating arm 403″, and the second bending arm 402″ and the second vibrating arm 403″ are disposed between the outer periphery of the second side magnet 23 and the housing 1.

[0098] In some embodiments, referring to FIG10, the short-side magnet includes a protrusion 2333, and two second clearance grooves 2332 are located on both sides of the protrusion 2333;

[0099] The outer wall surface of the protrusion 2333 is exposed on the outer wall surface of the housing 1 to increase the volume of the short side magnet; or the outer wall surface of the protrusion 2333 is flush with the outer wall surface of the housing 1 to ensure the structure of the sound-generating device is regular.

[0100] In some embodiments, the short-side magnet includes a protrusion 2333 and two second clearance grooves 2332 located on both sides of the protrusion 2333; along the short axis direction of the magnetic circuit assembly 2, two bent arms 402 of the same centering support 4 are arranged close to the two end faces of the protrusion 2333 to improve the structural compactness of the sound-generating device.

[0101] In some embodiments, the ends of the two vibrating arms 403 of each centering support plate 4 are fixed to the corners of the housing 1, that is, the outer ends of the vibrating arms 403 of each centering support plate 4 are fixed to the four corners of the housing 1, which facilitates positioning and assembly.

[0102] In one embodiment, referring to Figures 3 and 7, the first side magnetic part 22 includes a first side magnet 221 and a first side magnetic plate 222, with the first side magnet 221 sandwiched between the first side magnetic plate 222 and the magnetic yoke 24.

[0103] In this embodiment, optionally, the first side magnet 221 is a closed ring structure; or, there are multiple first side magnets 221, with adjacent first side magnets 221 connected end to end to form a closed ring structure.

[0104] In this embodiment, the first side magnet 221 is clamped between the first side magnetic plate 222 and the magnetic yoke 24. This clamping method provides stable support for the first side magnet 221 and can prevent the first side magnet 221 from being displaced or loosened.

[0105] In this embodiment, the first side magnet 221 forms a closed ring structure, which helps to generate a more uniform and stable magnetic field in the magnetic gap of the sound-generating device.

[0106] In some embodiments, referring to FIG7, the first side magnetic part 22 includes a first side magnet 221 and a first side magnetic plate 222, with the first side magnet 221 sandwiched between the first side magnetic plate 222 and the magnetic yoke 24;

[0107] The first side magnetic plate 222 is provided with a first clearance structure 223. The first clearance structure 223 is formed by a first clearance groove and / or a clearance hole through the first side magnetic plate 222 formed by a recess on the side of the first side magnetic plate 222 away from the first side magnet 221. The first clearance structure 223 is used to avoid the connecting arm 401 of the centering support plate 4 and / or the lead wire of the voice coil component 32.

[0108] In this embodiment, the centering support 4 includes a connecting arm 401, a bent arm 402, and a vibrating arm 403. The connecting arm 401 is disposed on the diaphragm component 31 and electrically connected to the first voice coil 321 and the second voice coil 322. The vibrating arm 403 extends in a bent shape, and the bent arm 402 extends along the vibration direction and connects between the connecting arm 401 and the vibrating arm 403. The first clearance structure 223 is used to avoid the connecting arm 401 of the centering support 4, or further to avoid the lead wire of the voice coil component 32. Thus, the first clearance structure 223 can be a thinned area on the first side magnetic plate 222 or a through hole penetrating the first side magnetic plate 222, so as to avoid the connecting arm 401 and / or the lead wire of the voice coil component 32 of the centering support 4 through the first clearance structure 223, so that there is no physical interference between the first side magnetic part 22 and the centering support 4, ensuring that the vibration component 3 can vibrate freely and its vibration performance is not affected by the space limitation of the first side magnetic part 22.

[0109] In one embodiment, referring to FIG3, the first side magnetic part 22 includes a first side magnet 221 and a first side magnetic plate 222. The first side magnet 221 is sandwiched between the first side magnetic plate 222 and the magnetic yoke 24. The first side magnet 221 includes a plurality of first sub-magnets. A first airflow gap is formed between adjacent first sub-magnets. The first airflow gap connects the first magnetic gap and the second magnetic gap.

[0110] In this embodiment, a first airflow gap is left between adjacent first sub-magnets so that the airflow when the diaphragm component 31 vibrates can flow through the first magnetic gap and the second magnetic gap in the sound-generating device, thereby improving the gas flow in the vibration space, avoiding excessive air pressure on one side of the diaphragm component 31 when it vibrates, and improving the vibration balance of the diaphragm component 31.

[0111] In one embodiment, the first airflow gap may extend along the long axis of the magnetic circuit assembly 2, or it may extend along the short axis of the magnetic circuit assembly 2, or the first airflow gap may be distributed at the four corners of the magnetic circuit assembly. The appropriate option can be chosen flexibly based on the specific circumstances.

[0112] In some embodiments, referring to FIG3, the central magnetic part 21 includes a central magnet 211 and a central magnetic guide plate 212. The central magnet 211 is sandwiched between the central magnetic guide plate 212 and the magnetic guide yoke 24. The central magnet 211 serves as a magnetic source, and its magnetic lines of force are concentrated and enhanced through the magnetic guiding effect of the central magnetic guide plate 212. Furthermore, the central magnet 211 is sandwiched between the central magnetic guide plate 212 and the magnetic guide yoke 24. This clamping method provides stable support for the central magnet 211 and can prevent the central magnet 211 from shifting or loosening.

[0113] In one embodiment, referring to Figures 3, 8 and 9, the second side magnetic part 23 includes a second side magnet 231 and a second side magnetic plate 232, with the second side magnet 231 sandwiched between the second side magnetic plate 232 and the magnetic yoke.

[0114] Optionally, the second side magnet 231 forms a closed ring structure to improve the stability of the magnetic field formed by the second side magnet 23; or, there are multiple second side magnets 231, with adjacent second side magnets 231 connected end to end to form a closed ring structure, improving the stability of the magnetic circuit assembly 2; or the second side magnet 231 includes multiple second sub-magnets, with a second airflow gap formed between adjacent second sub-magnets, the second airflow gap connecting the second magnetic gap and the space outside the sound-generating device. This facilitates the flow of air in the vibration cavity of the sound-generating device and the external airflow, balances the air pressure inside and outside the vibration cavity, improves the vibration stability of the diaphragm component 31, and improves the sound-generating performance of the sound-generating device.

[0115] In this embodiment, the second airflow gap can extend in the long axis direction of the magnetic circuit assembly, or the second airflow gap can extend in the short axis direction of the magnetic circuit assembly, or the second airflow gap can be distributed at the four corners of the magnetic circuit assembly, all of which can ensure that the airflow of the diaphragm component 31 is connected to the outside when it vibrates.

[0116] In some embodiments, referring to Figures 8 and 9, the second side magnetic part 23 includes a second side magnet 231 and a second side magnetic plate 232, with the second side magnet 231 sandwiched between the second side magnetic plate 232 and the magnetic yoke.

[0117] The second magnetic guide plate 232 has a hollowed-out portion 2331, which constitutes at least part of the second avoidance structure 233, that is, the hollowed-out portion 2331 forms part of the second avoidance structure 233.

[0118] The hollowed-out portion 2331 includes a first hollowed-out portion 2331′ opposite to the vibrating arm 403 and a second hollowed-out portion 2331” opposite to the bending arm 402. The first hollowed-out portion 2331′ and the second hollowed-out portion 2331” are connected, and the second hollowed-out portion 2331” penetrates the inner wall surface of the second side magnetic plate 232.

[0119] In this embodiment, the centering support 4 includes a connecting arm 401, a bent arm 402, and a vibrating arm 403. The connecting arm 401 is disposed between the diaphragm component 31 and the voice coil component 32 and is electrically connected to the first voice coil 321 and the second voice coil 322. The vibrating arm 403 extends in a bent shape. The first hollow portion 2331' facilitates the insertion of the vibrating arm 403. The bent arm 402 passes through the second hollow portion 2331" and extends inward through the inner wall of the second side magnetic plate 232. The ends of the bent arm 402 located at both ends of the second hollow portion 2331" are respectively connected to the connecting arm 401 and the vibrating arm 403, so as to extend the vibrating arm 403 to the outer periphery of the second side magnetic portion 23.

[0120] In some embodiments, referring to Figures 8 and 10, the second side magnet 231 includes short side magnets located on both sides of the long axis direction of the magnetic circuit assembly 2, and the second side magnet 231 includes long side magnets located on both sides of the short axis direction of the magnetic circuit assembly 2.

[0121] The second side magnetic plate 232, which is enclosed by the inner sides of the first hollow part 2331′ and the second hollow part 2331″, forms a magnetic extension part 2321. The two magnetic extension parts 2321 cover both ends of the short side magnet so that the magnetic field of the second side magnet 231 can be converged to the center by the magnetic extension parts 2321, thereby increasing the magnetic field strength of the magnetic circuit assembly 2.

[0122] In one embodiment, referring to Figures 3 and 10, the second side magnet 231 includes a plurality of second sub-magnets, a second airflow gap is formed between adjacent second sub-magnets, and the hollow portion 2331 communicates with the second airflow gap.

[0123] In this embodiment, the second side magnetic part 23 includes a second side magnet 231 and a second side magnetic guide plate 232. The second side magnet 231 is sandwiched between the second side magnetic guide plate 232 and the magnetic yoke 24. The second side magnet 231 includes a plurality of second sub-magnets. A second airflow gap is formed between adjacent second sub-magnets. The second airflow gap connects the second magnetic gap and the space outside the sound-generating device. The second side magnetic guide plate 232 forms a closed ring structure. A hollow part 2331 is provided on the second side magnetic guide plate 232.

[0124] In this embodiment, the hollow portion 2331 on the second side magnetic plate 232 can connect the second magnetic gap and the space outside the sound generating device, so that the airflow when the diaphragm component 31 vibrates can flow outward through the hollow portion 2331, avoiding excessive air pressure on one side of the diaphragm component 31 when it vibrates, and ensuring the sensitivity of the diaphragm component 31 vibration.

[0125] In some embodiments, the diaphragm component 31 includes a diaphragm 311 and a dome 312. The diaphragm 311 is connected to the housing, the dome 312 is connected to the diaphragm 311, the first voice coil 321 and the second voice coil 322 are connected to the dome 312, and the connecting arm 401 is connected to the dome 312.

[0126] In this embodiment, when the dome 312 is connected to the diaphragm 311, the dome 312 may be connected to the center of the diaphragm 311; or a hollow region may be provided on the diaphragm 311, and the dome 312 may cover the hollow region.

[0127] In one embodiment, referring to Figures 11 to 15, the dome 312 is provided with an extension arm 3121 that bends toward the vibrating arm 403. The extension arm 3121 is connected to the vibrating arm 403. There are multiple extension arms 3121, and each extension arm 3121 is connected to a corresponding vibrating arm 403. This further improves the stability of the connection between the centering support 4 and the dome 312 and the consistency of the reciprocating vibration.

[0128] In one embodiment, this application provides an electronic device that includes the aforementioned sound-generating device.

[0129] In this embodiment, the sound-generating device of the electronic device adopts a dual voice coil configuration. The first voice coil 321 is connected to the diaphragm component 31 and suspended in the first magnetic gap, and the second voice coil 322 is connected to the diaphragm component 31 and suspended in the second magnetic gap. The centering support plate 4 is electrically connected to the first voice coil 321 and the second voice coil 322, which increases the magnetic field strength of the magnetic circuit component 2, thereby increasing the BL value of the sound-generating device and ensuring the acoustic performance of the electronic device.

[0130] The electronic device includes, but is not limited to, one of the following: smartwatch, mobile phone, tablet computer, e-book reader, audio player, video player, computer, set-top box, and wearable device.

[0131] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.

Claims

1. A sound-generating device, characterized in that, include: case; A magnetic circuit assembly is disposed within the housing. The magnetic circuit assembly includes a magnetic yoke and a central magnetic portion, a first side magnetic portion, and a second side magnetic portion disposed on the magnetic yoke. The first side magnetic portion is disposed around the central magnetic portion and forms a first magnetic gap with the central magnetic portion. The second side magnetic portion is disposed around the first side magnetic portion and forms a second magnetic gap with the first side magnetic portion. A vibration assembly, comprising a diaphragm component and a voice coil component, wherein the diaphragm component is connected to the housing, and the voice coil component comprises a first voice coil and a second voice coil, wherein the first voice coil is connected to the diaphragm component and suspended in a first magnetic gap, and the second voice coil is connected to the diaphragm component and suspended in a second magnetic gap; as well as A centering support is provided, which is electrically connected to the voice coil component and an external circuit. The centering support includes a connecting arm, a bent arm, and a vibrating arm connected in sequence. The connecting arm is disposed on the diaphragm component and electrically connected to the first voice coil and the second voice coil. The outer end of the vibrating arm is connected to the housing and extends inward in a bent shape. The bent arm is connected between the connecting arm and the vibrating arm and extends from the inner end of the vibrating arm along the vibration direction of the vibration assembly and is connected to the connecting arm.

2. The sound-generating device according to claim 1, characterized in that, The connecting arm and the vibrating arm are located in different planes; A second clearance structure is formed on the outer periphery of the second side magnet to avoid the vibrating arm.

3. The sound-generating device according to claim 1, characterized in that, The first side magnetic part includes a first side magnet and a first side magnetic plate, with the first side magnet sandwiched between the first side magnetic plate and the magnetic yoke; The first side magnet forms a closed ring structure; or, There are multiple first-side magnets, and adjacent first-side magnets are connected end-to-end to form a closed ring structure; or, The first side magnet includes a plurality of first sub-magnets, and a first airflow gap is formed between adjacent first sub-magnets. The first airflow gap connects the first magnetic gap and the second magnetic gap.

4. The sound-generating device according to claim 3, characterized in that, The first side magnetic plate is provided with a first clearance structure, which includes a first clearance groove formed by a recess on the side of the first side magnetic plate away from the first side magnet and / or a clearance hole penetrating the first side magnetic plate. The first clearance structure is used to avoid the connecting arm of the centering support plate and / or the lead wire of the voice coil component.

5. The sound-generating device according to claim 2, characterized in that, The second side magnetic part includes a second side magnet and a second side magnetic plate, with the second side magnet sandwiched between the second side magnetic plate and the magnetic yoke; The second side magnet forms a closed ring structure; or, The second side magnet consists of multiple magnets, with adjacent second side magnets connected end-to-end to form a closed ring structure; or, The second side magnet includes a plurality of second sub-magnets, and a second airflow gap is formed between adjacent second sub-magnets. The second airflow gap connects the second magnetic gap and the space outside the sound-generating device.

6. The sound-generating device according to claim 2, characterized in that, The centering support includes two, and the two centering supports are disposed on both sides of the long axis of the magnetic circuit assembly; The second side magnetic part includes a second side magnet and a second side magnetic plate, with the second side magnet sandwiched between the second side magnetic plate and the magnetic yoke; The second side magnet includes short side magnets located on both sides of the long axis of the magnetic circuit assembly, and long side magnets located on both sides of the short axis of the magnetic circuit assembly, wherein the second clearance structure is at least partially formed on the outer periphery of the short side magnets.

7. The sound-generating device according to claim 6, characterized in that, Each of the centering supports includes two vibrating arms disposed at the two ends corresponding to the two ends of the short side magnet, and the two vibrating arms are respectively connected to the two ends of the connecting arm by a bent arm; Both ends of the short-side magnet are provided with a second clearance groove corresponding to the vibrating arm on the side facing the housing, and the second clearance groove forms part of the second clearance structure.

8. The sound-generating device according to claim 6, characterized in that, The connecting arm includes a U-shaped portion with the opening facing the housing. The U-shaped portion includes a first arm that is connected to the two bent arms respectively and a second arm that connects the two first arms. The second arm is located between the first voice coil and the second voice coil, and the second arm is provided with a pad for connecting the first voice coil and the second voice coil.

9. The sound-generating device according to claim 8, characterized in that, One of the connecting arms has two pads on its second arm that are electrically connected to the lead-in end of the first voice coil and the lead-out end of the second voice coil. One of the connecting arms has two pads on its second arm that are electrically connected to the lead-out end of the first voice coil and the lead-in end of the second voice coil.

10. The sound-generating device according to claim 6, characterized in that, The short-side magnet includes a protrusion located between the two second clearance slots, the outer wall surface of which is exposed on the outer wall surface of the housing; or the outer wall surface of the protrusion is flush with the outer wall surface of the housing. And / or, the short-side magnet includes a protrusion located between the two second clearance slots, and two bent arms of the same centering support are disposed near the two end faces of the protrusion along the short axis direction of the magnetic circuit assembly. And / or, the ends of the two vibrating arms of each of the centering supports are fixed to the corners of the housing.

11. The sound-generating device according to claim 5, characterized in that, The second side magnetic plate has a hollow portion that constitutes at least part of the second avoidance structure.

12. The sound-generating device according to claim 11, characterized in that, The hollowed-out portion includes a first hollowed-out portion opposite to the vibrating arm and a second hollowed-out portion opposite to the bending arm. The first hollowed-out portion and the second hollowed-out portion are connected, and the second hollowed-out portion penetrates the inner wall surface of the second side magnetic plate.

13. The sound-generating device according to claim 12, characterized in that, The second side magnetic plate portion enclosed by the first and second hollow portions forms a magnetic extension portion, and the two magnetic extension portions cover both ends of the short side magnet.

14. The sound-generating device according to claim 11, characterized in that, The second side magnet includes a plurality of second sub-magnets, and a second airflow gap is formed between adjacent second sub-magnets. The hollowed-out portion is connected to the second airflow gap.

15. The sound-generating device according to claim 1, characterized in that, The diaphragm component includes a diaphragm and a dome. The diaphragm is connected to the housing, the dome is connected to the diaphragm, the first voice coil and the second voice coil are connected to the dome, and the connecting arm is connected to the dome.

16. The sound-generating device according to claim 15, characterized in that, The dome is provided with an extension arm that bends toward the vibrating arm. The extension arm is connected to the vibrating arm, and there are multiple extension arms, each corresponding to one of the vibrating arms.

17. An electronic device, characterized in that, Includes the sound-generating device according to any one of claims 1-16.

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