Sound production device and electronic equipment

Abstract

The utility model provides a sound production device and electronic equipment, the sound production device comprises a shell, a magnetic circuit assembly, a vibration assembly, a conductive support and a centering disk, the vibration assembly comprises a diaphragm component and a voice coil component, the diaphragm component is connected to an opening, the voice coil component comprises a first voice coil and a second voice coil, and the first voice coil is connected to the conductive support. The first voice coil is connected to the diaphragm component and suspended in the first magnetic gap, the second voice coil is connected to the diaphragm component and suspended in the second magnetic gap, and the centering disk is electrically connected with the first voice coil and the second voice coil to the conductive support, so that the magnetic field intensity of the magnetic circuit assembly is improved, the BL value of the sound production device can be increased, and the acoustic performance of the sound production device is ensured.

Description

Technical Field

[0001] The present application belongs to the technical field of electroacoustic transducer, and specifically relates to a sound-generating device and an electronic device. Background Art

[0002] As a crucial electroacoustic transducer, the sound generator ensures the sound production of electronic devices such as speakers, receivers, headphones, and mobile phones. As the performance of electronic devices improves, the acoustic performance of these devices is also an inevitable trend. To achieve better acoustic performance, sound generators often require larger magnetic circuit systems with stronger magnetic field strength.

[0003] In the related art, the sound-generating device usually arranges centering supports at the four corners of the sound-generating device or on the short axis of the sound-generating device. Although the voice coil can be connected and positioned, the centering supports occupy the space of the magnetic circuit system, reduce the magnetic field strength of the magnetic circuit system, and affect the acoustic performance of the sound-generating device. Utility Model Content

[0004] One purpose of the embodiments of the present application is to provide a new technical solution for a sound-emitting device and an electronic device.

[0005] According to a first aspect of an embodiment of the present application, there is provided a sound-generating device, comprising:

[0006] a housing having an opening;

[0007] A magnetic circuit assembly is disposed in the housing and is provided with a mounting through hole and a first magnetic gap and a second magnetic gap;

[0008] a vibration assembly, the vibration assembly comprising a diaphragm member and a voice coil member, the diaphragm member being connected to the opening, the voice coil member comprising a first voice coil and a second voice coil, the first voice coil being connected to the diaphragm member and suspended across the first magnetic gap, the second voice coil being connected to the diaphragm member and suspended across the second magnetic gap; and

[0009] A conductive support and a centering support, wherein the conductive support is embedded in the mounting through hole, and the centering support electrically connects the first voice coil and the second voice coil to the conductive support.

[0010] Optionally, the centering arm has a first end, a second end, and a middle portion located between the first end and the second end;

[0011] The first end portion is connected to the diaphragm component and electrically connects the first voice coil and the second voice coil, and the second end portion is electrically connected to the conductive support.

[0012] Optionally, the first end portion and the second end portion are located in different planes, and the middle portion includes a vibration arm connected to the second end portion and located in the same plane, and a connecting portion extending from the first end portion to the vibration arm and connected to the vibration arm;

[0013] The vibration arm extends in a bent shape; and / or a vibration space for accommodating the vibration arm is formed between the conductive support and the inner wall of the mounting through hole.

[0014] Optionally, the centering support piece is an integrated structure, and the first end portion includes two support pieces, which are respectively provided on both sides of the second end portion along the long axis direction or the short axis direction of the magnetic circuit assembly;

[0015] Alternatively, the centering supports include two, and the two centering supports are symmetrically distributed along the long axis direction or the short axis direction of the magnetic circuit component.

[0016] Optionally, the magnetic circuit assembly includes a magnetic yoke and a central magnetic portion, a first side magnetic portion and a second side magnetic portion arranged on the magnetic yoke, the first side magnetic portion is arranged around the central magnetic portion and forms a first magnetic gap with the central magnetic portion, the second side magnetic portion is arranged around the first side magnetic portion and forms a second magnetic gap with the first side magnetic portion, the mounting through hole passes through the magnetic yoke and the central magnetic portion, and is located in the central area of the magnetic circuit assembly.

[0017] Optionally, the central magnetic portion includes a central magnet and a central magnetic conductive plate, the central magnet is sandwiched between the central magnetic conductive plate and the magnetic conductive yoke, and the mounting through hole passes through the central magnet and the central magnetic conductive plate in sequence.

[0018] Optionally, a first avoidance structure is provided on the side of the central magnetic conductive plate close to the vibration component, one end of the first avoidance structure is connected to the mounting through hole, and the other end of the first avoidance structure extends toward the periphery of the central magnetic conductive plate, and the first avoidance structure includes at least one of an avoidance groove and an avoidance hole, for avoiding the middle part of the centering support plate.

[0019] Optionally, the first edge magnet portion includes a first edge magnet and a first edge washer, and the first edge magnet is sandwiched between the first edge washer and the magnetic yoke;

[0020] The first side magnet and the first side washer both form a closed ring structure; or,

[0021] There are multiple first side magnets and multiple first side washers, which are arranged in a one-to-one correspondence, and adjacent first side magnets are connected end to end to form a closed ring structure; or,

[0022] The first side washer forms a closed annular structure. The first side magnet includes a plurality of first sub-magnets. First airflow gaps are formed between adjacent first sub-magnets. The first airflow gaps connect the first magnetic gap and the second magnetic gap.

[0023] Optionally, a second avoidance structure is provided on the side of the first side washer away from the first side magnet, and the second avoidance structure includes at least one of a avoidance groove and a avoidance hole, and the second avoidance structure is used to avoid the end of the centering support plate and / or the lead of the voice coil component.

[0024] Optionally, the second side magnetic portion includes a second side magnet and a second side washer, and the second side magnet is sandwiched between the second side washer and the magnetic yoke;

[0025] The second side magnet and the second side washer both form a closed ring structure; or,

[0026] There are multiple second side magnets and multiple second side washers, which are arranged in a one-to-one correspondence, and adjacent second side magnets are connected end to end to form a closed ring structure; or,

[0027] The second side washer forms a closed annular structure, 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.

[0028] Optionally, the second side magnetic portion includes a second side magnet and a second side washer, the second side magnet is clamped between the second side washer and the magnetic yoke, 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-emitting device, and the second side washer is provided with an airflow hole, which connects the second airflow gap.

[0029] Optionally, the diaphragm component includes a diaphragm and a dome, the diaphragm is connected to the opening, the dome is connected to the diaphragm, and the first voice coil and the second voice coil are connected to the dome; wherein

[0030] A protrusion is provided on a side of the dome away from the diaphragm, and the first voice coil is connected to the protrusion.

[0031] Optionally, the dome includes a first dome provided with a through hole and a second dome covering the through hole, the through hole is arranged opposite to the conductive support, and the first voice coil and the second voice coil are both connected to the first dome.

[0032] Optionally, the conductive support is provided with a first welding surface and a second welding surface which are separated from each other, the first welding surface is arranged to face the centering support piece and is connected to the centering support piece, and the second welding surface is used to connect to an external power supply;

[0033] Wherein, the first welding surface is not higher than a side surface of the magnetic circuit component facing the diaphragm component.

[0034] Optionally, a groove is provided on a side of the conductive support facing away from the first welding surface, and a bottom wall of the groove forms the second welding surface;

[0035] And / or, the conductive support includes a main body and a conductive welding plate, the conductive welding plate is embedded in the main body, the conductive welding plate includes a first welding portion and a second welding portion connected to each other, at least a portion of the first welding portion is exposed on the first welding surface, and at least a portion of the second welding portion is exposed on the second welding surface.

[0036] Optionally, the conductive support is used to connect to an external electrical connector, a wiring groove is provided on a side of the magnetic circuit assembly facing away from the diaphragm component, a wiring opening is provided on a periphery of the magnetic circuit assembly, the wiring groove communicates with the mounting through hole and the wiring opening, and the electrical connector is provided in the wiring groove and the wiring opening and is electrically connected to the conductive support;

[0037] And / or, the conductive support and the magnetic circuit assembly are an integral injection-molded structure.

[0038] According to a second aspect of the embodiments of the present application, an electronic device is provided, which includes the sound-emitting device described in the first aspect.

[0039] One of the technical effects of this application is:

[0040] An embodiment of the present application provides a sound-emitting device, which includes a shell, a magnetic circuit assembly, a vibration assembly, a conductive support and a centering support. The vibration assembly includes a diaphragm component and a voice coil component. The diaphragm component is connected to an opening. The voice coil component includes a first voice coil and a second voice coil. The first voice coil is connected to the diaphragm component and suspended in a first magnetic gap. The second voice coil is connected to the diaphragm component and suspended in a second magnetic gap. The centering support electrically connects the first voice coil and the second voice coil to the conductive support, thereby improving the magnetic field strength of the magnetic circuit assembly, thereby increasing the BL value of the sound-emitting device and ensuring the acoustic performance of the sound-emitting device.

[0041] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0043] Figure 1 A stereoscopic sound device provided in one embodiment of the present application Figure 1 ;

[0044] Figure 2 A stereoscopic sound device provided in one embodiment of the present application Figure 2 ;

[0045] Figure 3 An exploded view of a sound-generating device provided in one embodiment of the present application;

[0046] Figure 4 A schematic diagram showing the connection of a voice coil component of a sound-generating device provided in one embodiment of the present application;

[0047] Figure 5 A schematic front view of a dome of a sound-generating device provided in one embodiment of the present application;

[0048] Figure 6 A schematic diagram of the back of a dome of a sound-generating device provided in one embodiment of the present application;

[0049] Figure 7 A schematic diagram of a central magnetic conductive plate of a sound-generating device provided in one embodiment of the present application;

[0050] Figure 8 A schematic diagram of a first side washer of a sound-generating device provided in one embodiment of the present application;

[0051] Figure 9 A schematic diagram of a magnet of a magnetic circuit assembly of a sound-generating device provided in one embodiment of the present application;

[0052] Figure 10 A schematic diagram of the outer side of a magnetic yoke of a sound-generating device provided in one embodiment of the present application;

[0053] Figure 11 A front view schematic diagram of a sound-generating device provided in one embodiment of the present application;

[0054] Figure 12 for Figure 11 Cross-section along the AA plane;

[0055] Figure 13 for Figure 11 Cross-sectional view along the BB plane.

[0056] in:

[0057] 1. Shell;

[0058] 11. Conductive support; 12. Opening; 13. Magnetic yoke; 131. Wire routing groove; 132. Wire routing opening; 14. Ring housing;

[0059] 2. Magnetic circuit components;

[0060] 21. Central magnetic portion; 211. Central magnet; 212. Central magnetic conductive plate; 213. First avoidance structure; 214. Mounting through hole;

[0061] 22. First side magnetic portion; 221. First side magnet; 222. First side washer; 223. Second avoidance structure;

[0062] 23. Second side magnetic portion; 231. Second side magnet; 232. Second side washer; 233. Air flow hole;

[0063] 3. Vibration component;

[0064] 31. Diaphragm component; 311. Diaphragm; 312. Dome; 3121. Protrusion;

[0065] 32. Voice coil component; 321. First voice coil; 322. Second voice coil; 323. Centering support; 3231. First end portion; 3232. Second end portion; 3233. Middle portion; 3234. Vibrating arm; 3235. Connecting portion. DETAILED DESCRIPTION

[0066] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application.

[0067] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be understood as limiting the present application. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0068] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly refer to one or more of the features. Throughout the description of this application, unless otherwise specified, "plurality" means two or more. Furthermore, "and / or" in the specification and claims refers to at least one of the connected entities, and the character " / " generally indicates an "or" relationship between the connected entities.

[0069] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0070] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0071] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0072] The embodiment of the present application provides a sound-generating device, which can be applied to electronic equipment. The sound-generating device includes:

[0073] Reference Figures 1 to 3 , an embodiment of the present application provides a sound-generating device, the sound-generating device comprising:

[0074] The housing 1 has an opening 12;

[0075] The magnetic circuit assembly 2 is disposed in the housing 1 , and includes a first magnetic gap and a second magnetic gap. The magnetic circuit assembly 2 is provided with a mounting through hole 214 ;

[0076] The vibration assembly 3 includes a diaphragm component 31 and a voice coil component 32. The diaphragm component 31 is connected to the opening 12. 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.

[0077] The conductive support 11 and the centering support 323, the conductive support 11 is embedded in the mounting hole 214, and the centering support 323 electrically connects the first voice coil 321 and the second voice coil 322 to the conductive support 11; for example, the conductive support 11 is embedded in the mounting hole 214 from one end of the mounting hole 214, and the centering support 323 is connected to the conductive support 11 from the other end of the mounting hole 214.

[0078] 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 , that is, the housing 1 provides an assembly basis for components such as the magnetic circuit assembly 2 and the vibration assembly 3 .

[0079] In one embodiment, the shell 1 can be an integral structure, for example, the shell 1 is an outer shell with an opening 12 on one side, the magnetic circuit component 2 and the vibration component 3 are assembled to the interior of the shell 1 through the opening 12, and the diaphragm component 31 is connected to the opening 12 and can emit sound to the outside through the opening 12.

[0080] In a specific embodiment, Figure 1 and Figure 3 As shown, the shell 1 is a square shell structure, and the shell 1 has a cavity with an opening on one side. The magnetic circuit component 2 is assembled inside the cavity, the vibration component 3 is connected to the opening 12 of the shell 1, and the magnetic circuit component 2 and the vibration component 3 are arranged relative to each other, so that the magnetic circuit component 2, the shell 1 and the vibration component 3 enclose a vibration cavity.

[0081] In one embodiment, the magnetic circuit assembly 2 includes a magnetic yoke 13 and a central magnetic portion 21, a first side magnetic portion 22, and a second side magnetic portion 23 disposed on the magnetic yoke 13. The first side magnetic portion 22 surrounds the central magnetic portion 21 and forms a first magnetic gap with the central magnetic portion 21. The second side magnetic portion 23 surrounds the first side magnetic portion 22 and forms a second magnetic gap with the first side magnetic portion 22. The mounting hole 214 extends through the magnetic yoke 13 and the central magnetic portion 21. Furthermore, the mounting hole 214 extends through the central region of the magnetic yoke 13 and the central magnetic portion 21.

[0082] In this embodiment, the central magnetic portion 21, the first side magnetic portion 22, and the second side magnetic portion 23 form the magnetic portion of the magnetic circuit. The magnetic yoke 13 of the magnetic circuit assembly 2 and the magnetic portion of the magnetic circuit are stacked up and down. The central magnetic portion 21, the first side magnetic portion 22, and the second side magnetic portion 23 of the magnetic circuit assembly 2 are arranged sequentially from the inside to the outside. On the basis that the magnetic yoke 13 supports the central magnetic portion 21, the first side magnetic portion 22, and the second side magnetic portion 23, the magnetic circuit assembly 2 can be connected to the housing 1 through the periphery of the outermost second side magnetic portion 23 to ensure the stability of the magnetic circuit assembly 2 within the housing 1. The mounting through hole 214 runs through the central area of the magnetic yoke 13 and the central magnetic portion 21, facilitating the symmetrical arrangement of components such as the magnetic circuit assembly 2 and simplifying the design.

[0083] In this embodiment, the diaphragm component 31 is connected to the opening 12 and is arranged relative to the magnetic circuit assembly 2. The first side magnetic portion 22 is arranged on the outside of the central magnetic portion 21 and is enclosed with the central magnetic portion 21 to form a first magnetic gap, so that one end of the first voice coil 321 is connected to the diaphragm component 31, so that 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 assembly 2, thereby 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 of the sound-emitting device.

[0084] At the same time, the second side magnetic portion 23 is arranged on the outside of the first side magnetic portion 22, and is enclosed with the first side magnetic portion 22 to form a second magnetic gap, thereby connecting one end of the second voice coil 322 to the diaphragm component 31, so that 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, thereby 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 of the sound-generating device; when the second voice coil 322 and the first voice coil 321 cooperate with each other 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-generating device operates in a wider frequency range, thereby providing richer timbre and more delicate sound quality.

[0085] In this embodiment, a mounting through-hole 214 is provided on the central magnetic portion 21 located in the middle of the magnetic circuit assembly 2, and the conductive support 11 is embedded in the mounting through-hole 214 from one end of the mounting through-hole 214. One end of the centering support 323 can be electrically connected to the first voice coil 321 and the second voice coil 322, and the other end of the centering support 323 can be electrically connected to the conductive support 11 from the other end of the mounting through-hole 214. In this way, the current is introduced from the inner side of the first voice coil 321 and the second voice coil 322 into the first voice coil 321 and the second voice coil 322 through the centering support 323. At the same time, the centering support 323 is used to center the first voice coil 321 and the second voice coil 322 during vibration, thereby preventing the first voice coil 321 and the second voice coil 322 from swinging or polarizing during vibration, thereby improving the sound effect and acoustic performance of the sound-generating device.

[0086] In the magnetic circuit assembly 2, since the magnetic field utilization rate at the central position of the central magnetic part 21 is low, a mounting hole 214 is set at the central position of the central magnetic part 21. Under the premise of having little impact on the magnetic field strength of the magnetic circuit assembly 2, the central position of the central magnetic part 21 can be hollowed out to achieve weight reduction, and the conductive support 11 can be installed and fixed in the shell 1 through the mounting hole 214; moreover, since the centering support piece 323 is connected to the mounting hole 214 in the central magnetic part 21, the centering support piece 323 will not occupy the setting space of the first side magnetic part 22 and the second side magnetic part 23, so that the setting volume of the first side magnetic part 22 and the second side magnetic part 23 can be increased to improve the magnetic field strength of the magnetic circuit assembly 2, and then the BL value (driving strength value) of the sound-generating device can be improved to ensure the acoustic performance of the sound-generating device.

[0087] In addition, due to the problem of magnetic leakage at the central position of the central magnetic part 21, the mounting through hole 214 in the embodiment of the present application can be formed by removing at least a portion of the magnet at the central position of the central magnetic part 21, thereby reducing the amount of magnetic leakage of the central magnetic part 21. When the sound-emitting device is assembled in an electronic device, the influence of the magnetic leakage of the central magnetic part 21 in the sound-emitting device on the performance of the electronic device can be reduced, thereby meeting the requirements of the electronic device for magnetic leakage.

[0088] The sound-generating device provided by the embodiment of the present application includes a shell 1, which has an opening 12; a magnetic circuit component 2, which is arranged in the shell 1, and includes a central magnetic part 21, a first side magnetic part 22 and a second side magnetic part 23; the first side magnetic part 22 is arranged 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 arranged around the first side magnetic part 22, and forms a second magnetic gap with the first side magnetic part 22, and the central magnetic part 21 is provided with a mounting through hole 214; a vibration component 3, which includes a diaphragm component 31 and a voice coil component 32, the diaphragm component 31 is connected to the opening 12, and the voice coil component 32 is connected to the voice coil component 32. The coil component 32 includes a first voice coil 321, a second voice coil 322 and a centering support 323. 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. The sound-emitting device also includes a conductive support 11 embedded in the mounting through hole 214 and a centering support 323 electrically connected to the conductive support 11. The centering support 323 electrically connects the first voice coil 321 and the second voice coil 322 to the conductive support 11, thereby improving the magnetic field strength of the magnetic circuit assembly 2, thereby increasing the BL value (driving strength value) of the sound-emitting device and ensuring the acoustic performance of the sound-emitting device.

[0089] In one embodiment, see Figure 4The centering support 323 includes a first end 3231, a second end 3232, and an intermediate portion 3233 located between the first end 3231 and the second end 3232. The first end 3231 is connected to the diaphragm component 31 and electrically connects the first voice coil 321 and the second voice coil 322. The second end 3232 is electrically connected to the conductive support 11. By connecting the first end 3231 to the diaphragm component 31, the first end 3231 can be prevented from occupying the space provided for the magnetic circuit assembly 2. The vibrating arm 3234 and the second end 3232 can be bent toward the magnetic circuit assembly 2 through the connecting portion and then extend to the mounting hole 214, forming a staggered structure between the first end 3231 and the second end 3232. This optimizes the use of installation space and prevents interference between the centering support 323 and the magnetic circuit assembly 2.

[0090] In this embodiment, the second end portion 3232 has a solder point, which is electrically connected to the solder pad of the conductive support 11 through the solder point. The first end portion 3231 can be electrically connected to the lead at one end of the first voice coil 321 and the second voice coil 322 when connected to the diaphragm component 31, so as to realize circuit conduction from the conductive support 11, the centering support plate 323 to the first voice coil 321 and the second voice coil 322, thereby ensuring the current transmission stability of the first voice coil 321 and the second voice coil 322.

[0091] In one embodiment, the first voice coil 321 and the second voice coil 322 can be connected in series through the centering support plate 323 to ensure the consistency of the current in the first voice coil 321 and the second voice coil 322, thereby facilitating 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 plate 323, so that the current in the first voice coil 321 and the second voice coil 322 can be independently controlled, thereby improving the flexibility of the diaphragm component 31 in driving the vibration when the first voice coil 321 and the second voice coil 322 vibrate.

[0092] In one embodiment, the first end portion 3231 and the second end portion 3232 are located in different planes, and the middle portion 3233 includes a vibration arm 3234 connected to the second end portion 3232 and located in the same plane, and a connecting portion 3235 extending from the first end portion 3231 to the vibration arm 3234 and connected to the vibration arm 3234. Optionally, the vibration arm 3234 extends in a bent shape, that is, the vibration arm 3234 has at least one bend, so that the vibration arm 3234 can deform the centering arm 323 and serve to center the reciprocating vibration of the first voice coil 321 and the second voice coil 322 during the vibration of the diaphragm assembly.

[0093] In one embodiment, a vibration space is formed between the conductive support 11 and the inner wall of the mounting hole 214 to avoid the vibration arm 3234. In this way, the vibration arm 3234 will not interfere with other components such as the central magnetic part 21 during vibration, thereby improving the reliability of the sound-generating device.

[0094] In one embodiment, see Figure 4 The vibration arm 3234 extends in a bent shape and is connected to both sides of the second end portion 3232. The vibration arm 3234 extends in a bent shape to provide deformation space for the centering support piece 323. In the structure in which the first voice coil 321 and the second voice coil 322 are connected to the conductive support 11 through the centering support piece 323, the reciprocating vibration of the first voice coil 321 and the second voice coil 322 can be centered by the deformation of the centering support piece 323.

[0095] In some embodiments, the centering support piece 323 is an integrated structure, and the first end portion 3231 includes two and is respectively arranged on both sides of the second end portion 3232 along the long axis direction or the short axis direction of the magnetic circuit assembly 2, so as to connect the first voice coil 321 and the second voice coil 322 to the conductive support 11 through the integrated centering support piece 323, thereby improving the stability of the first voice coil 321 and the second voice coil 322.

[0096] In some embodiments, the centering support pieces 323 include two, and the two centering support pieces 323 are symmetrically distributed along the long axis direction or the short axis direction of the magnetic circuit component 2 .

[0097] Optionally, the two centering supports 323 are respectively a first support and a second support, one end of the first support is electrically connected to the conductive support 11, and the other end of the first support is electrically connected to one end of the first voice coil 321 and one end of the second voice coil 322;

[0098] One end of the second support is electrically connected to the conductive support 11 , and the other end of the second support is electrically connected to the other end of the first voice coil 321 and the other end of the second voice coil 322 .

[0099] In one embodiment, see Figure 3 The central magnetic portion 21 includes a central magnet 211 and a central magnetic plate 212. The central magnet 211 is sandwiched between the central magnetic plate 212 and the magnetic yoke 13. The mounting through hole 214 passes through the central magnet 211 and the central magnetic plate 212 in sequence.

[0100] In this embodiment, the central magnet 211 serves as a magnetic source, and its magnetic lines of force are concentrated and enhanced by the magnetic conductivity of the central magnetic plate 212. The central magnet 211 is clamped between the central magnetic plate 212 and the magnetic yoke 13. This clamping method provides stable support for the central magnet 211 and can prevent the central magnet 211 from being displaced or loosened.

[0101] The mounting through hole 214 passes through the central magnet 211 and the central magnetic conductive plate 212 in sequence. The hollowing out of the mounting through hole 214 can reduce the magnetic leakage of the central magnetic part 21, thereby reducing the influence of the magnetic leakage of the central magnetic part 21 in the sound-generating device on the performance of the electronic equipment, thereby meeting the requirements of the electronic equipment for magnetic leakage.

[0102] In one embodiment, see Figure 3 and Figure 7 A first avoidance structure 213 is provided on the side of the central magnetic conductive plate 212 close to the vibration component 3. One end of the first avoidance structure 213 is connected to the mounting through hole 214, and the other end of the first avoidance structure 213 extends toward the periphery of the central magnetic conductive plate 212. The first avoidance structure 213 includes at least one of an avoidance groove and an avoidance hole, so as to avoid the middle part 3233 of the centering support piece 323.

[0103] In this embodiment, the centering support 323 has a first end 3231, a second end 3232 and a middle portion 3233 located between the first end 3231 and the second end 3232; the first end 3231 is connected to the diaphragm component 31 and electrically connected to the first voice coil 321 and the second voice coil 322, and the second end 3232 is electrically connected to the conductive support 11.

[0104] In this embodiment, the first avoidance structure 213 can connect to the mounting through hole 214 and connect to the peripheral space of the central magnetic conductive plate 212, so as to avoid the middle portion 3233 of the centering support piece 323 located on the upper surface of the central magnetic conductive plate 212; the avoidance groove can be a thinned area on the central magnetic conductive plate 212, and the avoidance hole can be a through hole passing through the central magnetic conductive plate 212, so as to avoid the middle portion 3233 of the centering support piece 323 through the first avoidance structure 213, so that there will be no physical interference between the central magnetic part 21 and the centering support piece 323, thereby ensuring that the vibration component 3 can vibrate freely and its vibration performance will not be affected by the space limitation of the central magnetic part 21.

[0105] In one embodiment, see Figure 3 and Figure 8 The first side magnetic portion 22 includes a first side magnet 221 and a first side washer 222 . The first side magnet 221 is sandwiched between the first side washer 222 and the magnetic yoke 13 .

[0106] In this embodiment, optionally, the first side magnet 221 and the first side washer 222 both form a closed ring structure to improve the stability of the magnetic field formed by the first side magnetic portion 22; or, there are multiple first side magnets 221 and first side washers 222, and they are arranged one by one, and adjacent first side magnets 221 are connected end to end to form a closed ring structure, so as to facilitate the flexible arrangement of the first side magnets 221 and the first side washers 222; or, at least one of the first side magnets 221 and the first side washers 222 forms a closed ring structure, so that the first side magnetic portion 22 generates a more uniform and stable magnetic field.

[0107] In this embodiment, the first side magnet 221 is sandwiched between the first side washer 222 and the magnetic yoke 13 . This sandwiching method provides stable support for the first side magnet 221 and can prevent the first side magnet 221 from being displaced or loosened.

[0108] In this embodiment, the closed ring structure of the first side magnet 221 and / or the first side washer 222 helps to generate a more uniform and stable magnetic field in the magnetic gap of the sound-generating device, thereby reducing sound distortion caused by uneven magnetic field.

[0109] In some embodiments, a second avoidance structure 223 is provided on the side of the first side washer 222 away from the first side magnet 221. The second avoidance structure 223 includes at least one of an avoidance groove and an avoidance hole. The second avoidance structure 223 is used to avoid the end of the centering support plate 323 and / or the lead of the voice coil component 32.

[0110] In this embodiment, the centering arm 323 has a first end 3231, a second end 3232, and an intermediate portion 3233 located between the first and second ends 3231 and 3232. The first end 3231 is connected to the diaphragm assembly 31 and electrically connected to the first and second voice coils 321 and 322, while the second end 3232 is electrically connected to the conductive support 11. The second relief structure 223 is used to provide clearance for the first end 3231 or, more specifically, for the leads of the voice coil assembly 32. The second relief structure 223 can be a thinned area or a through-hole on the first side washer 222. This relief structure 223 provides clearance for the end of the centering arm 323 and / or the leads of the voice coil assembly 32. This prevents physical interference between the first side magnet 22 and the centering arm 323, ensuring free vibration of the vibration assembly 3 without being affected by the spatial constraints of the first side magnet 22.

[0111] In one embodiment, see Figure 8 and Figure 9The first side magnetic portion 22 includes a first side magnet 221 and a first side washer 222. The first side magnet 221 is sandwiched between the first side washer 222 and the magnetic yoke 13. The first side washer 222 forms a closed ring structure. 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.

[0112] In this embodiment, a first airflow gap is left between adjacent first sub-magnets to facilitate the airflow to flow in the sound-emitting device through the first magnetic gap and the second magnetic gap when the diaphragm component 31 vibrates, thereby avoiding excessive air pressure on one side of the diaphragm component 31 when vibrating, thereby ensuring the amplitude and efficiency of the vibration of the diaphragm component 31.

[0113] In one embodiment, the first airflow gap may extend in the long axis direction of the magnetic circuit component 2, or the first airflow gap may extend in the short axis direction of the magnetic circuit component 2, or the first airflow gap may be distributed at the four corners of the magnetic circuit component. The selection may be flexible according to actual conditions.

[0114] In one embodiment, see Figure 3 and Figure 9 The second side magnetic portion 23 includes a second side magnet 231 and a second side washer 232, and the second side magnet 231 is sandwiched between the second side washer 232 and the magnetic yoke 13. Optionally, the second side magnet 231 and the second side washer 232 both form a closed annular structure to improve the stability of the magnetic field formed by the second side magnetic portion 23; or, there are multiple second side magnets 231 and second side washers 232, and they are arranged one by one, and adjacent second side magnets 231 are connected end to end to form a closed annular structure, so as to facilitate the flexible arrangement of the second side magnets 231 and the second side washers 232, and airflow gaps can be formed between adjacent second side magnets 231 and adjacent second side washers 232 to facilitate the flow of air inside the sound-generating device.

[0115] Or in other embodiments, the second side magnetic portion 23 includes a second side magnet 231 and a second side washer 232, the second side magnet 231 is sandwiched between the second side washer 232 and the magnetic yoke 13, the second side washer 232 forms a closed ring structure, the second side magnet 231 includes a plurality of second sub-magnets, and a second air flow gap is formed between adjacent second sub-magnets. The second air flow gap connects the second magnetic gap and the space outside the sound-producing device, so that the air flow in the vibration cavity of the sound-producing device and the external air flow are circulated, the air pressure inside and outside the vibration cavity is balanced, the vibration stability of the diaphragm component 31 is improved, and the sound performance of the sound-producing device is improved.

[0116] 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 is distributed at the four corners of the magnetic circuit assembly, all of which can ensure that the airflow is connected to the outside when the diaphragm component 31 vibrates.

[0117] In one embodiment, see Figure 3 The second side magnetic portion 23 includes a second side magnet 231 and a second side washer 232. The second side magnet 231 is sandwiched between the second side washer 232 and the magnetic yoke 13. 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 washer 232 forms a closed ring structure. An airflow hole 233 is provided on the second side washer 232.

[0118] In this embodiment, the air flow hole 233 on the second side washer 232 can connect the second magnetic gap and the space outside the sound-emitting device, so that the air flow can flow outward through the air flow hole 233 when the diaphragm component 31 vibrates, avoiding excessive air pressure on one side of the diaphragm component 31 when vibrating, thereby ensuring the sensitivity of vibration of the diaphragm component 31.

[0119] In one embodiment, see Figure 3 、 Figure 5 and Figure 6 The diaphragm component 31 includes a diaphragm 311 and a dome 312. The diaphragm 311 is connected to the opening 12, the dome 312 is connected to the diaphragm 311, and the first voice coil 321 and the second voice coil 322 are connected to the dome 312. A protrusion 3121 is provided on the side of the dome 312 away from the diaphragm 311, and the first voice coil 321 is connected to the protrusion 3121.

[0120] In this embodiment, when the dome 312 is connected to the diaphragm 311, the dome 312 can be connected to the inner side of the diaphragm 311, for example, the dome 312 is attached to the inner side of the diaphragm 311; or a hollow area is set on the diaphragm 311, and the dome 312 is connected to the hollow area.

[0121] The first voice coil 321 is connected to a protrusion 3121 on the inner side of the dome 312. The protrusion 3121 facilitates support and bonding of the first voice coil 321, ensuring the stability of the first voice coil 321. The second voice coil 322 can be spaced apart from the outer periphery of the first voice coil 321 and connected to the same side of the dome 312 as the first voice coil 321, ensuring consistent driving effects of the first and second voice coils 321, 322. Optionally, the protrusion 3121 is formed by a depression of the dome 312 toward one side of the magnetic circuit assembly 2.

[0122] In one embodiment, the dome 312 includes a first dome 3121 having a through hole and a second dome 3122 covering the through hole. The through hole is arranged opposite to the conductive support 11, so as to facilitate welding of the second end of the centering support 323 and the conductive support 11; the first voice coil 321 and the second voice coil 322 are both connected to the first dome 3121, ensuring the synchronization of the movements of the first voice coil 321 and the second voice coil 322.

[0123] In one embodiment, see Figure 3 The conductive support 11 is provided with a first welding surface and a second welding surface which are opposite to each other. The first welding surface is arranged facing the centering support piece 323 and is connected to the centering support piece 323. The second welding surface is used to connect to an external power supply.

[0124] The first welding surface is no higher than the surface of the magnetic circuit assembly 2 facing the diaphragm component 31. Because the conductive support 11 is embedded in the mounting hole 214, the second end of the centering support 323 can extend into the mounting hole 214 to connect with the conductive support 11, thereby preventing interference with the vibration of the vibration assembly 3. In one embodiment, the first welding surface is no higher than the surface of the central magnetic portion 21 facing the diaphragm component 31.

[0125] In one embodiment, a groove is provided on the side of the conductive support 11 facing away from the first welding surface, and the bottom wall of the groove forms a second welding surface; thereby providing installation space for the conductive circuit or flexible circuit board used to connect the conductive support 11, and protecting the conductive circuit or flexible circuit board.

[0126] In one embodiment, the conductive support 11 includes a main body and a conductive pad embedded within the main body. The conductive pad includes a first and second connected pads, with at least a portion of the first pad exposed on the first pad surface, and at least a portion of the second pad exposed on the second pad surface. A conductive trace or flexible printed circuit board (FPC) connected to an external circuit is electrically connected to the second pad on the second pad surface, thereby smoothly conducting external current through the conductive support 11 and the centering pad 323 to the first and second voice coils 321 and 322.

[0127] In one embodiment, the housing 1 includes an annular shell 14 , one end of which is connected to the magnetic yoke 13 , and the other end of which forms an opening 12 ; the conductive support 11 is disposed in the middle of the inner side of the magnetic yoke 13 .

[0128] In this embodiment, an installation cavity is formed by connecting one end of the annular shell 14 to the magnetic yoke 13, which facilitates the installation of the magnetic circuit component 2 and the vibration component 3 in the installation cavity and the opening 12; and the conductive support 11 is arranged in the middle position inside the magnetic yoke 13, and the first voice coil 321 and the second voice coil 322 can be connected inward to the conductive support 11 through the centering support 323, avoiding the size occupation of the first side magnetic part 22 and the second side magnetic part 23, thereby ensuring the stability of the magnetic circuit component 2 set inside the shell 1.

[0129] In one embodiment, see Figure 3 and Figure 10 The conductive support 11 is used to connect to an external electrical connector. A wiring groove 131 is provided on the side of the magnetic circuit assembly 2 facing away from the diaphragm component 31. A wiring opening 132 is provided on the periphery of the magnetic circuit assembly 2. The wiring groove 131 communicates with the mounting through-hole 214 and the wiring opening 132. An electrical connector is provided in the wiring groove 131 and the wiring opening 132 and is electrically connected to the conductive support 11. In one embodiment, a wiring groove 131 is provided on the side of the magnetic yoke 13 facing away from the diaphragm component 31. A wiring opening 132 is provided on the periphery of the magnetic yoke. The wiring groove 131 communicates with the mounting through-hole 214 and the wiring opening 132. An electrical connector is provided in the wiring groove 131 and the wiring opening 132 and is electrically connected to the conductive support 11.

[0130] In this embodiment, the electrical connector can be an FPC (Flexible Printed Circuit) or a cable, the wiring groove 131 can be a thinned area on the outside of the magnetic yoke 13, and the wiring opening 132 can be a through-hole area on the outside of the magnetic yoke 13. The wiring groove 131 and the wiring opening 132 provide a dedicated channel for the electrical connector, making the structure of the sound-emitting device more compact and helping to save overall space.

[0131] In one embodiment, the magnetic circuit assembly 2 and the magnetic yoke 13 are integrally molded to improve the stability of the conductive support 11. Specifically, the conductive support 11 and the magnetic yoke 13 are integrally molded or the conductive support 11 and the central magnetic plate 212 are integrally molded.

[0132] In one embodiment, the present application provides an electronic device comprising the above-mentioned sound-generating device.

[0133] In this embodiment, the sound-emitting device of the electronic device adopts a dual voice coil setting, and 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, and the centering support 323 electrically connects the first voice coil 321 and the second voice coil 322 to the conductive support 11, thereby improving the magnetic field strength of the magnetic circuit assembly 2, thereby increasing the BL value of the sound-emitting device and ensuring the acoustic performance of the electronic device.

[0134] The electronic device includes but is not limited to one of a smart watch, a mobile phone, a tablet computer, an e-book reader, an audio player, a video player, a computer, a set-top box and a wearable device.

[0135] Although some specific embodiments of the present application have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A sound-generating device, characterized in that: include: a housing having an opening; A magnetic circuit assembly is disposed in the housing and is provided with a mounting through hole and a first magnetic gap and a second magnetic gap; a vibration assembly, the vibration assembly comprising a diaphragm member and a voice coil member, the diaphragm member being connected to the opening, the voice coil member comprising a first voice coil and a second voice coil, the first voice coil being connected to the diaphragm member and suspended across the first magnetic gap, the second voice coil being connected to the diaphragm member and suspended across the second magnetic gap; and A conductive support and a centering support, wherein the conductive support is embedded in the mounting through hole, and the centering support electrically connects the first voice coil and the second voice coil to the conductive support.

2. The sound-generating device according to claim 1, wherein: The centering arm has a first end, a second end, and a middle portion located between the first end and the second end; The first end portion is connected to the diaphragm component and electrically connects the first voice coil and the second voice coil, and the second end portion is electrically connected to the conductive support.

3. The sound-generating device according to claim 2, characterized in that: The first end portion and the second end portion are located in different planes, and the middle portion includes a vibration arm connected to the second end portion and located in the same plane, and a connecting portion extending from the first end portion to the vibration arm and connected to the vibration arm; The vibration arm extends in a bent shape; and / or a vibration space for accommodating the vibration arm is formed between the conductive support and the inner wall of the mounting through hole.

4. The sound-generating device according to claim 2, characterized in that: The centering support is an integrated structure, and the first end portion includes two support members, which are respectively arranged on both sides of the second end portion along the long axis direction or the short axis direction of the magnetic circuit component; Alternatively, the centering supports include two, and the two centering supports are symmetrically distributed along the long axis direction or the short axis direction of the magnetic circuit component.

5. The sound-generating device according to claim 1, characterized in that: The magnetic circuit assembly includes a magnetic yoke and a central magnetic portion, a first side magnetic portion and a second side magnetic portion arranged on the magnetic yoke. The first side magnetic portion is arranged around the central magnetic portion and forms a first magnetic gap with the central magnetic portion. The second side magnetic portion is arranged around the first side magnetic portion and forms a second magnetic gap with the first side magnetic portion. The mounting through hole passes through the magnetic yoke and the central magnetic portion and is located in the central area of the magnetic circuit assembly.

6. The sound-generating device according to claim 5, characterized in that: The central magnetic portion includes a central magnet and a central magnetic conductive plate. The central magnet is sandwiched between the central magnetic conductive plate and the magnetic conductive yoke. The mounting through hole passes through the central magnet and the central magnetic conductive plate in sequence.

7. The sound-generating device according to claim 6, characterized in that: A first avoidance structure is provided on one side of the central magnetic conductive plate close to the vibration component, one end of the first avoidance structure is connected to the mounting through hole, and the other end of the first avoidance structure extends toward the periphery of the central magnetic conductive plate, and the first avoidance structure includes at least one of an avoidance groove and an avoidance hole, so as to avoid the middle part of the centering support plate.

8. The sound-generating device according to claim 5, characterized in that: The first side magnet portion includes a first side magnet and a first side washer, and the first side magnet is sandwiched between the first side washer and the magnetic yoke; The first side magnet and the first side washer both form a closed ring structure; or, There are multiple first side magnets and multiple first side washers, which are arranged in a one-to-one correspondence, and adjacent first side magnets are connected end to end to form a closed ring structure; or, The first side washer forms a closed annular structure. The first side magnet includes a plurality of first sub-magnets. First airflow gaps are formed between adjacent first sub-magnets. The first airflow gaps connect the first magnetic gap and the second magnetic gap.

9. The sound-generating device according to claim 8, characterized in that: A second avoidance structure is provided on the side of the first side washer away from the first side magnet. The second avoidance structure includes at least one of a avoidance groove and a avoidance hole. The second avoidance structure is used to avoid the end of the centering support plate and / or the lead of the voice coil component.

10. The sound-generating device according to claim 5, characterized in that: The second side magnetic portion includes a second side magnet and a second side washer, and the second side magnet is sandwiched between the second side washer and the magnetic yoke; The second side magnet and the second side washer both form a closed ring structure; or, There are multiple second side magnets and multiple second side washers, which are arranged in a one-to-one correspondence, and adjacent second side magnets are connected end to end to form a closed ring structure; or, The second side washer forms a closed annular structure, 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.

11. The sound generating device according to claim 5, characterized in that: The second side magnetic portion includes a second side magnet and a second side washer, the second side magnet is clamped between the second side washer and the magnetic yoke, 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-emitting device. The second side washer is provided with an airflow hole, and the airflow hole connects the second airflow gap.

12. The sound-generating device according to claim 1, wherein: The diaphragm component includes a diaphragm and a dome, the diaphragm is connected to the opening, the dome is connected to the diaphragm, and the first voice coil and the second voice coil are connected to the dome; in A protrusion is provided on a side of the dome away from the diaphragm, and the first voice coil is connected to the protrusion.

13. The sound generating device according to claim 12, characterized in that: The dome includes a first dome with a through hole and a second dome covering the through hole. The through hole is arranged opposite to the conductive support. The first voice coil and the second voice coil are both connected to the first dome.

14. The sound-generating device according to claim 1, wherein: The conductive support is provided with a first welding surface and a second welding surface which are separated from each other, the first welding surface is arranged to face the centering support piece and is connected to the centering support piece, and the second welding surface is used to connect to an external power supply; Wherein, the first welding surface is not higher than a side surface of the magnetic circuit component facing the diaphragm component.

15. The sound generating device according to claim 14, wherein: A groove is provided on a side of the conductive support facing away from the first welding surface, and a bottom wall of the groove forms the second welding surface; And / or, the conductive support includes a main body and a conductive welding plate, the conductive welding plate is embedded in the main body, the conductive welding plate includes a first welding portion and a second welding portion connected to each other, at least a portion of the first welding portion is exposed on the first welding surface, and at least a portion of the second welding portion is exposed on the second welding surface.

16. The sound-generating device according to claim 1, characterized in that The conductive support is used to connect to an external electrical connector. A wiring groove is provided on a side of the magnetic circuit assembly facing away from the diaphragm component. A wiring opening is provided on the periphery of the magnetic circuit assembly. The wiring groove communicates with the mounting through hole and the wiring opening. The electrical connector is provided in the wiring groove and the wiring opening and is electrically connected to the conductive support. And / or, the conductive support and the magnetic circuit assembly are an integral injection-molded structure.

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

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