Sound generating apparatus and electronic device

Abstract

The present application provides a sound generating apparatus and an electronic device. The sound generating apparatus comprises a housing, a magnetic circuit assembly, a vibration assembly, a conductive support and a centering spider, wherein the vibration assembly comprises a diaphragm component and a voice coil component, the diaphragm component is connected to an opening, and the voice coil component comprises a first voice coil and a second voice coil, with 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 the centering spider electrically connects the first voice coil and the second voice coil to the conductive support. The magnetic field intensity of the magnetic circuit assembly is increased, thereby increasing the BL value of the sound generating apparatus and ensuring the acoustic performance of the sound generating apparatus.

Description

Sound production device and electronic device TECHNICAL FIELD

[0001] The present application belongs to the technical field of electro-acoustic transduction, and in particular, the present application relates to a sound production device and an electronic device. BACKGROUND

[0002] As an important electro-acoustic transduction component, the sound production device can provide sound production guarantee for electronic devices such as loudspeakers, earpieces, earphones, and mobile phones. With the improvement of the performance of electronic devices, the improvement of the acoustic performance of the sound production device is also an inevitable trend. In order to meet better acoustic performance, the sound production device often needs to be configured with a magnetic circuit system that has a larger size and a stronger magnetic field strength.

[0003] In related technologies, the sound production device is usually configured to set a centering piece at four corners of the sound production device or a short axis of the sound production device, which can connect and position the voice coil, but the centering piece occupies the space of the magnetic circuit system, reduces the magnetic field strength of the magnetic circuit system, and affects the acoustic performance of the sound production device. SUMMARY

[0004] An object of embodiments of the present application is to provide a new technical solution for a sound production device and an electronic device.

[0005] According to a first aspect of embodiments of the present application, a sound production device is provided, comprising:

[0006] a housing having an opening;

[0007] a magnetic circuit assembly disposed in the housing, the magnetic circuit assembly being provided with a mounting through hole and first and second magnetic gaps;

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

[0009] a conductive support embedded in the mounting through hole, and a centering piece electrically connecting the first and second voice coils to the conductive support.

[0010] Optionally, the centering piece has a first end portion, a second end portion, and an intermediate portion between the first end portion and the second end portion.

[0011] The first end portion is connected to the diaphragm component and electrically connected to the first and second voice coils, 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, the intermediate portion includes a vibrating arm connected to the second end portion and located in the same plane as the second end portion, and a connecting portion extending from the first end portion to the vibrating arm and connected to the vibrating arm;

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

[0014] Optionally, the centering support is of an integral structure, and the first end portion includes two and is respectively arranged on both sides of the second end portion along a long axis direction or a short axis direction of the magnetic circuit assembly;

[0015] Alternatively, the centering support includes two, and the two centering supports are symmetrically distributed along a long axis direction or a short axis direction of the magnetic circuit assembly.

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

[0017] Optionally, the center magnetic portion includes a center magnet and a center magnetic plate, the center magnet is clamped between the center magnetic plate and the magnetic yoke, and the mounting through hole penetrates the center magnet and the center magnetic plate in sequence.

[0018] Optionally, a first avoiding structure is arranged on a side of the center magnetic plate close to the vibrating assembly, one end of the first avoiding structure communicates with the mounting through hole, and the other end of the first avoiding structure extends towards a circumferential edge of the center magnetic plate, and the first avoiding structure includes at least one of an avoiding groove and an avoiding hole for avoiding the intermediate portion of the centering support.

[0019] Optionally, the first side magnetic portion includes a first side magnet and a first side Vasier, and the first side magnet is clamped between the first side Vasier and the magnetic yoke.

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

[0021] The first side magnet and the first side Vasier each are a plurality of and are arranged one by one, and adjacent first side magnets are connected end to end to form a closed ring structure; or,

[0022] The first side magnet and the first side yoke form a closed ring structure; the first side magnet comprises a plurality of first sub-magnets, and a first air flow gap is formed between adjacent first sub-magnets, and the first air flow gap is communicated with the first magnetic gap and the second magnetic gap.

[0023] Optionally, a second avoiding structure is arranged on a side of the first side yoke away from the first side magnet, the second avoiding structure comprises at least one of an avoiding slot and an avoiding hole, and the second avoiding structure is used for avoiding the end of the centering piece and / or the lead wire of the voice coil component.

[0024] Optionally, the second side magnetic part comprises a second side magnet and a second side yoke, and the second side magnet is clamped between the second side yoke and the magnetic yoke.

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

[0026] The second side magnet and the second side yoke are in 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 yoke forms a closed ring structure, and the second side magnet comprises a plurality of second sub-magnets, and a second air flow gap is formed between adjacent second sub-magnets, and the second air flow gap is communicated with the second magnetic gap and the space outside the sound generating device.

[0028] Optionally, the second side magnetic part comprises a second side magnet and a second side yoke, and the second side magnet is clamped between the second side yoke and the magnetic yoke, the second side magnet comprises a plurality of second sub-magnets, and a second air flow gap is formed between adjacent second sub-magnets, and the second air flow gap is communicated with the second magnetic gap and the space outside the sound generating device, and the second side yoke is provided with an air flow through hole, and the air flow through hole is communicated with the second air flow gap.

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

[0030] The ball top is provided with a protrusion on a side away from the diaphragm, and the first voice coil is connected to the protrusion.

[0031] Optionally, the ball top comprises a first ball top provided with a through hole and a second ball top 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 ball top.

[0032] Optionally, the conductive support is provided with a first welding surface and a second welding surface facing away from each other, the first welding surface is arranged to face the centering sheet and is connected to the centering sheet, and the second welding surface is used to connect to an external power supply.

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

[0034] Optionally, a groove is arranged 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] Optionally, the conductive support comprises a main body and a conductive welding sheet, the conductive welding sheet is embedded in the main body, the conductive welding sheet comprises a first welding portion and a second welding portion connected to each other, at least part of the first welding portion is exposed to the first welding surface, and at least part of the second welding portion is exposed to the second welding surface.

[0036] Optionally, the conductive support is used to be connected to an external electrical connector, a wiring groove is arranged on a side of the magnetic circuit assembly facing away from the diaphragm component, a wiring port is arranged on a periphery of the magnetic circuit assembly, the wiring groove is in communication with the mounting through hole and the wiring port, and the electrical connector is arranged in the wiring groove and the wiring port and is electrically connected to the conductive support.

[0037] Optionally, the conductive support and the magnetic circuit assembly are in an integral injection molding structure.

[0038] According to a second aspect of the embodiments of the present application, an electronic device is provided, which comprises the sound generating device of the first aspect.

[0039] One technical effect of the present application is that:

[0040] The embodiments of the present application provide a sound generating device, which comprises a housing, a magnetic circuit assembly, a vibration assembly, a conductive support and a centering sheet. The vibration assembly comprises a diaphragm component and a voice coil component. The diaphragm component is connected to the opening. The voice coil component comprises a first voice coil and a second voice coil. The first voice coil is connected to the diaphragm component and is suspended in a first magnetic gap. The second voice coil is connected to the diaphragm component and is suspended in a second magnetic gap. The centering sheet electrically connects the first voice coil and the second voice coil to the conductive support. The magnetic field strength of the magnetic circuit assembly is improved, thereby increasing the BL value of the sound generating device and ensuring the acoustic performance of the sound generating device.

[0041] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments thereof, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0042] 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.

[0043] Figure 1 is a perspective view of a sound-generating device according to an embodiment of this application;

[0044] Figure 2 is a perspective view of a sound-generating device according to an embodiment of this application;

[0045] Figure 3 is an exploded view of a sound-generating device according to an embodiment of this application;

[0046] Figure 4 is a schematic diagram of the connection of the voice coil component of a sound-generating device according to an embodiment of this application;

[0047] Figure 5 is a front view of the dome of a sound-generating device according to an embodiment of this application;

[0048] Figure 6 is a schematic diagram of the back of the dome of a sound-generating device according to an embodiment of this application;

[0049] Figure 7 is a schematic diagram of the central magnetic plate of a sound-generating device according to an embodiment of this application;

[0050] Figure 8 is a schematic diagram of the first side washer of a sound-generating device according to an embodiment of this application;

[0051] Figure 9 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 10 is a schematic diagram of the outer side of the magnetic yoke of a sound-generating device according to an embodiment of this application;

[0053] Figure 11 is a front view of a sound-generating device according to an embodiment of this application;

[0054] Figure 12 is a cross-sectional view along plane AA in Figure 11;

[0055] Figure 13 is a cross-sectional view along the BB plane in Figure 11.

[0056] Wherein: 1, shell; 11, conductive support; 12, opening; 13, magnetic yoke; 131, wiring groove; 132, wiring port; 14, annular shell; 2, magnetic circuit assembly; 21, center magnetic part; 211, center magnet; 212, center magnetic plate; 213, first avoidance structure; 214, mounting through hole; 22, first edge magnetic part; 221, first edge magnet; 222, first edge halsi; 223, second avoidance structure; 23, second edge magnetic part; 231, second edge magnet; 232, second edge halsi; 233, airflow through hole; 3, vibration assembly; 31, diaphragm component; 311, diaphragm; 312, ball top; 3121, protrusion; 32, voice coil component; 321, first voice coil; 322, second voice coil; 323, centering support piece; 3231, first end part; 3232, second end part; 3233, middle part; 3234, vibration arm; 3235, connecting part. DETAILED DESCRIPTION

[0057] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of the components and steps set forth in the embodiments, numerical expressions, and numerical values are not limiting to the scope of the present application unless specifically stated otherwise.

[0058] The embodiments of the present application will be described in detail below with reference to the drawings. The embodiments described below by reference to the drawings are exemplary and are for the purpose of explanation only and are not to be understood as limiting the present application. All other embodiments obtained by a person of ordinary skill in the art without creative effort based on the embodiments in the present application fall within the scope of the present application.

[0059] The terms "first", "second" in the specification and claims of the present application can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally means that the front and rear associated objects are in a "or" relationship.

[0060] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0061] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0062] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0063] The embodiment of the present application provides a sound generating device, which can be applied to an electronic device, and the sound generating device comprises,

[0064] Referring to FIGS. 1-3, the embodiment of the present application provides a sound generating device, which comprises:

[0065] A housing 1, the housing 1 has an opening 12;

[0066] A magnetic circuit assembly 2, the magnetic circuit assembly 2 is arranged in the housing 1, the magnetic circuit assembly 2 comprises a first magnetic gap and a second magnetic gap, the magnetic circuit assembly 2 is provided with a mounting through hole 214;

[0067] A vibration assembly 3, the vibration assembly 3 comprises 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 comprises 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;

[0068] The conductive support 11 is embedded in the mounting hole 214, and the centering sheet 323 electrically connects the first voice coil 321 and the second voice coil 322 to the conductive support 11.

[0069] In this embodiment, the shell 1 is used to mount, fix and support the magnetic circuit assembly 2, the vibration assembly 3 and other components, that is, the shell 1 provides a basis for the assembly of the magnetic circuit assembly 2, the vibration assembly 3 and other components.

[0070] In one embodiment, the shell 1 can be a whole structure, for example, the shell 1 is a housing with an opening 12 on one side, and the magnetic circuit assembly 2 and the vibration assembly 3 are assembled into 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 externally through the opening 12.

[0071] In a specific embodiment, as shown in FIG. 1 and FIG. 3, the shell 1 is a square shell structure, and the shell 1 has a cavity with an opening on one side, the magnetic circuit assembly 2 is assembled inside the cavity, the vibration assembly 3 is connected to the opening 12 of the shell 1, and the magnetic circuit assembly 2 and the vibration assembly 3 are oppositely arranged, so that the magnetic circuit assembly 2, the shell 1 and the vibration assembly 3 form a vibration cavity.

[0072] In one embodiment, the magnetic circuit assembly 2 includes a magnetic yoke 13, a center magnetic part 21, a first side magnetic part 22 and a second side magnetic part 23 arranged on the magnetic yoke 13; the first side magnetic part 22 is arranged around the center magnetic part 21 and forms a first magnetic gap with the center 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 mounting hole 214 penetrates the magnetic yoke 13 and the center magnetic part 21. Further, the mounting hole 214 penetrates the central region of the magnetic yoke 13 and the center magnetic part 21.

[0073] In this embodiment, the center magnetic part 21, the first side magnetic part 22 and the second side magnetic part 23 form a magnetic circuit magnetic part, the magnetic yoke 13 and the magnetic circuit magnetic part of the magnetic circuit assembly 2 are stacked in layers, the center magnetic part 21, the first side magnetic part 22 and the second side magnetic part 23 of the magnetic circuit assembly 2 are arranged in order from inside to outside, and on the basis of the magnetic yoke 13 bearing the center 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 shell 1 through the peripheral edge of the outermost second side magnetic part 23 to ensure the stability of the arrangement of the magnetic circuit assembly 2 inside the shell 1. The mounting hole 214 penetrates the central region of the magnetic yoke 13 and the center magnetic part 21, which facilitates the symmetrical arrangement of the magnetic circuit assembly 2 and other components and simplifies the design.

[0074] In this embodiment, the diaphragm component 31 is connected to the opening 12 and is arranged opposite the magnetic circuit assembly 2, the first side magnetic part 22 is arranged outside the central magnetic part 21 and encloses the central magnetic part 21 to form a first magnetic gap, one end of the first voice coil 321 is connected to the diaphragm component 31, and the other end of the first voice coil 321 is suspended in the first magnetic gap. When an electric current is passed through the first voice coil 321, the first voice coil 321 reciprocates in the first magnetic gap formed by the magnetic circuit assembly 2, thereby realizing the conversion between electric energy and mechanical energy, and the diaphragm component 31 is driven to vibrate by the first voice coil 321, thereby realizing sound generation of the sound generation device.

[0075] Meanwhile, the second side magnetic part 23 is arranged outside the first side magnetic part 22 and encloses the first side magnetic part 22 to form a second magnetic gap, one end of the second voice coil 322 is connected to the diaphragm component 31, and the other end of the second voice coil 322 is suspended in the second magnetic gap. When an electric current is passed through the second voice coil 322, the second voice coil 322 reciprocates in the second magnetic gap formed by the magnetic circuit assembly 2, thereby realizing the conversion between electric energy and mechanical energy, and the diaphragm component 31 is driven to vibrate by the second voice coil 322, thereby realizing sound generation of 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 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 tone and more delicate sound quality.

[0076] In this embodiment, the central magnetic part 21 in the middle of the magnetic circuit assembly 2 is provided with a mounting through hole 214, 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 sheet 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 sheet 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 inside of the first voice coil 321 and the second voice coil 322 to the first voice coil 321 and the second voice coil 322 through the centering support sheet 323, and the centering support sheet 323 plays a centering role when the first voice coil 321 and the second voice coil 322 vibrate, avoiding the first voice coil 321 and the second voice coil 322 from swinging or deviating during vibration, thereby improving the sound generation effect and acoustic performance of the sound generation device.

[0077] In the magnetic circuit assembly 2, since the magnetic field utilization rate at the central position of the center magnetic part 21 is low, by arranging the mounting through hole 214 at the central position of the center magnetic part 21, the weight reduction can be realized by hollowing out the central position of the center magnetic part 21, and the mounting and fixing of the conductive support 11 in the shell 1 through the mounting through hole 214 can be realized with little influence on the magnetic field strength of the magnetic circuit assembly 2; and since the centering support sheet 323 is connected into the mounting through hole 214 in the center magnetic part 21, the centering support sheet 323 does not occupy the arrangement space of the first side magnetic part 22 and the second side magnetic part 23, so that the first side magnetic part 22 and the second side magnetic part 23 can increase the arrangement volume to improve the magnetic field strength of the magnetic circuit assembly 2, and thus the BL value (driving strength value) of the sound generating device can be improved to ensure the acoustic performance of the sound generating device.

[0078] In addition, since the center magnetic part 21 has the problem of magnetic leakage at the central position, the mounting through hole 214 of the embodiment of the application can be formed by removing at least part of the magnet at the central position of the center magnetic part 21, so that the magnetic leakage amount of the center magnetic part 21 can be reduced, and when the sound generating device is assembled in the electronic equipment, the influence of the center magnetic part 21 in the sound generating device on the performance of the electronic equipment due to magnetic leakage can be reduced to meet the requirement of the electronic equipment on the magnetic leakage amount.

[0079] The sound generating device provided by the embodiment of the application comprises a shell 1 having an opening 12; a magnetic circuit assembly 2 arranged in the shell 1, the magnetic circuit assembly 2 comprising a center 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 center magnetic part 21 and forms a first magnetic gap with the center 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 center magnetic part 21 is provided with a mounting through hole 214; a vibration assembly 3 comprising 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 comprises a first voice coil 321, a second voice coil 322 and a centering support sheet 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, and the sound generating device further comprises a conductive support 11 embedded in the mounting through hole 214 and the centering support sheet 323 electrically connected to the conductive support 11, the centering support sheet 323 electrically connects the first voice coil 321 and the second voice coil 322 to the conductive support 11, which improves the magnetic field strength of the magnetic circuit assembly 2, and thus the BL value (driving strength value) of the sound generating device can be increased to ensure the acoustic performance of the sound generating device.

[0080] In one embodiment, referring to FIG. 4, the centering sheet 323 has a first end 3231, a second end 3232 and an intermediate portion 3233 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. By arranging the first end 3231 to be connected to the diaphragm component 31, the first end 3231 can avoid occupying the space provided for the magnetic circuit assembly 2; and the vibration arm 3234 and the second end 3232 can extend to the mounting through hole 214 after being bent towards the magnetic circuit assembly 2 through the connecting portion, so as to form a staggered structure of the first end 3231 and the second end 3232, reasonably utilize the provided space, and avoid mutual interference between the centering sheet 323 and the magnetic circuit assembly 2.

[0081] In this embodiment, the second end 3232 has a welding point, which is electrically connected to the pad of the conductive support 11; and the first end 3231 can be electrically connected to the lead wire of one end of the first voice coil 321 and the second voice coil 322 in the case of being connected to the diaphragm component 31, so as to realize the circuit conduction of the conductive support 11, the centering sheet 323, the first voice coil 321 and the second voice coil 322, and ensure the stability of the current transmission of the first voice coil 321 and the second voice coil 322.

[0082] In one embodiment, the first voice coil 321 and the second voice coil 322 can be connected in series through the centering sheet 323, so as to ensure the consistency of the current in the first voice coil 321 and the second voice coil 322, and facilitate 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 sheet 323, so that the current in the first voice coil 321 and the second voice coil 322 can be independently controlled, and the flexibility of driving the diaphragm component 31 to vibrate when the first voice coil 321 and the second voice coil 322 vibrate is improved.

[0083] In one embodiment, the first end 3231 and the second end 3232 are located in different planes, the intermediate portion 3233 includes a vibration arm 3234 connected to the second end 3232 and located in the same plane, and a connecting portion 3235 extending from the first end 3231 to the vibration arm 3234 and connected to the vibration arm 3234. Optionally, the vibration arm 3234 extends in a bent shape, i.e. the vibration arm 3234 has at least one bending, so as to realize the deformation of the centering sheet 323 through the vibration arm 3234, 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.

[0084] In one embodiment, a vibration space is formed between the conductive support 11 and the inner wall of the mounting through hole 214 to avoid the vibration arm 3234. In this way, the vibration arm 3234 does not interfere with other components such as the center magnetic part 21 during vibration, improving the reliability of the sound production device.

[0085] In one embodiment, referring to FIG. 4, the vibration arm 3234 extends in a bent shape and is connected to both sides of the second end 3232. The bent extension of the vibration arm 3234 provides a deformation space for the centering bracket 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 bracket 323, the reciprocating vibration of the first voice coil 321 and the second voice coil 322 can be centered through the deformation of the centering bracket 323.

[0086] In some embodiments, the centering bracket 323 is a one-piece structure, and the first end 3231 includes two ends that are respectively arranged on both sides of the second end 3232 along the long axis direction or the short axis direction of the magnetic circuit assembly 2. The one-piece centering bracket 323 connects the first voice coil 321 and the second voice coil 322 to the conductive support 11, thereby improving the stability of the first voice coil 321 and the second voice coil 322.

[0087] In some embodiments, the centering bracket 323 includes two centering brackets 323 that are symmetrically distributed along the long axis direction or the short axis direction of the magnetic circuit assembly 2.

[0088] Alternatively, the two centering brackets 323 are a first bracket and a second bracket, respectively. One end of the first bracket is electrically connected to the conductive support 11, and the other end of the first bracket is electrically connected to one end of the first voice coil 321 and one end of the second voice coil 322.

[0089] One end of the second bracket is electrically connected to the conductive support 11, and the other end of the second bracket is electrically connected to the other end of the first voice coil 321 and the other end of the second voice coil 322.

[0090] In one embodiment, referring to FIG. 3, the center magnetic part 21 includes a center magnet 211 and a center magnetic plate 212. The center magnet 211 is clamped between the center magnetic plate 212 and the magnetic yoke 13, and the mounting through hole 214 sequentially penetrates the center magnet 211 and the center magnetic plate 212.

[0091] In this embodiment, the center magnet 211 serves as a magnetic source, and its magnetic lines are concentrated and enhanced by the magnetic conduction of the center magnetic plate 212. The center magnet 211 is clamped between the center magnetic plate 212 and the magnetic yoke 13, which provides stable support for the center magnet 211 and prevents displacement or loosening of the center magnet 211.

[0092] The mounting through hole 214 penetrates the center magnet 211 and the center magnetic conducting plate 212 in sequence. The hollow setting of the mounting through hole 214 can reduce the magnetic leakage of the center magnetic part 21, and further reduce the influence of the magnetic leakage of the center magnetic part 21 on the performance of the electronic device, so as to meet the requirement of the electronic device on the magnetic leakage.

[0093] In one embodiment, referring to FIGS. 3 and 7, the center magnetic conducting plate 212 is provided with a first avoiding structure 213 on the side close to the vibration assembly 3. One end of the first avoiding structure 213 is communicated with the mounting through hole 214, and the other end of the first avoiding structure 213 extends towards the periphery of the center magnetic conducting plate 212. The first avoiding structure 213 includes at least one of an avoiding slot and an avoiding hole, and is used for avoiding the middle part 3233 of the centering support sheet 323.

[0094] In this embodiment, the centering support sheet 323 has a first end part 3231, a second end part 3232, and a middle part 3233 between the first end part 3231 and the second end part 3232. The first end part 3231 is connected with the diaphragm part 31 and electrically connected with the first voice coil 321 and the second voice coil 322. The second end part 3232 is electrically connected to the conductive support 11.

[0095] In this embodiment, the first avoiding structure 213 can communicate the mounting through hole 214 to the peripheral space of the center magnetic conducting plate 212, so as to avoid the middle part 3233 of the centering support sheet 323 on the upper surface of the center magnetic conducting plate 212. The avoiding slot can be a thinned area on the center magnetic conducting plate 212, and the avoiding hole can be a through hole penetrating the center magnetic conducting plate 212. The avoiding of the middle part 3233 of the centering support sheet 323 by the first avoiding structure 213 can prevent the physical interference between the center magnetic part 21 and the centering support sheet 323, so as to ensure that the vibration assembly 3 can freely vibrate and the vibration performance of the vibration assembly 3 is not affected by the space limitation of the center magnetic part 21.

[0096] In one embodiment, referring to FIGS. 3 and 8, the first side magnetic part 22 includes a first side magnet 221 and a first side amorphous metal 222. The first side magnet 221 is clamped between the first side amorphous metal 222 and the magnetic conducting yoke 13.

[0097] In this embodiment, the first side magnet 221 and the first side amorphous metal 222 can form a closed ring structure, so as to improve the stability of the magnetic field generated by the first side magnetic part 22. Alternatively, the first side magnet 221 and the first side amorphous metal 222 can be a plurality of and correspondingly arranged. The 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 magnet 221 and the first side amorphous metal 222. Alternatively, at least one of the first side magnet 221 and the first side amorphous metal 222 forms a closed ring structure, so as to generate a more uniform and stable magnetic field by the first side magnetic part 22.

[0098] In this embodiment, the first side magnet 221 is clamped between the first side vane 222 and the magnetic yoke 13. This clamping manner provides stable support for the first side magnet 221, which can prevent the first side magnet 221 from displacement or loosening.

[0099] In this embodiment, the closed ring structure of the first side magnet 221 and / or the first side vane 222 helps to generate a more uniform and stable magnetic field in the magnetic gap of the sound generating device, reducing the distortion of sound generated due to the non-uniformity of the magnetic field.

[0100] In some embodiments, the first side vane 222 is provided with a second avoiding structure 223 away from the side of the first side magnet 221, the second avoiding structure 223 includes at least one of an avoiding slot and an avoiding hole, and the second avoiding structure 223 is used to avoid the end of the centering support sheet 323 and / or the lead wire of the voice coil component 32.

[0101] In this embodiment, the centering support sheet 323 has a first end 3231, a second end 3232, and an intermediate portion 3233 between the first end 3231 and the second end 3232; the first end 3231 is connected with the diaphragm component 31 and electrically connected with the first voice coil 321 and the second voice coil 322, and the second end 3232 is electrically connected to the conductive support 11. The second avoiding structure 223 is used to avoid the first end 3231, or further used to avoid the lead wire of the voice coil component 32. In this way, the second avoiding structure 223 can be a thinned area or a through hole on the first side vane 222, so that the second avoiding structure 223 avoids the end of the centering support sheet 323 and / or the lead wire of the voice coil component 32, so that there is no physical interference between the first side magnetic part 22 and the centering support sheet 323, ensuring that the vibration assembly 3 can vibrate freely and will not affect its vibration performance due to the space limitation of the first side magnetic part 22.

[0102] In one embodiment, referring to FIGS. 8 and 9, the first side magnetic part 22 includes the first side magnet 221 and the first side vane 222, the first side magnet 221 is clamped between the first side vane 222 and the magnetic yoke 13, the first side vane 222 forms a closed ring structure, and the first side magnet 221 includes a plurality of first sub-magnets, a first airflow gap is formed between adjacent first sub-magnets, and the first airflow gap communicates the first magnetic gap and the second magnetic gap.

[0103] In this embodiment, a first airflow gap is left between adjacent first sub-magnets, so that the airflow flows in the sound generating device through the first magnetic gap and the second magnetic gap when the diaphragm component 31 vibrates, avoiding excessive air pressure on one side of the diaphragm component 31 when it vibrates, and ensuring the amplitude and efficiency of the vibration of the diaphragm component 31.

[0104] In one embodiment, the first air flow gap can extend in the long axis direction of the magnetic circuit assembly 2, or the first air flow gap can extend in the short axis direction of the magnetic circuit assembly 2, or the first air flow gap is distributed at the four corner positions of the magnetic circuit assembly. The actual situation is flexible.

[0105] In one embodiment, referring to FIGS. 3 and 9, the second edge magnetic part 23 includes a second edge magnet 231 and a second edge amorphous metal 232, and the second edge magnet 231 is clamped between the second edge amorphous metal 232 and the magnetic yoke 13. Optionally, the second edge magnet 231 and the second edge amorphous metal 232 each form a closed ring structure to improve the stability of the magnetic field formed by the second edge magnetic part 23; or the second edge magnet 231 and the second edge amorphous metal 232 are each a plurality of and are arranged one-to-one, and adjacent second edge magnets 231 are connected end to end to form a closed ring structure, so as to facilitate flexible arrangement of the second edge magnet 231 and the second edge amorphous metal 232, and an air flow gap can be formed between adjacent second edge magnets 231 and between adjacent second edge amorphous metals 232, facilitating air flow in the sound generating device.

[0106] Or in other embodiments, the second edge magnetic part 23 includes a second edge magnet 231 and a second edge amorphous metal 232, the second edge magnet 231 is clamped between the second edge amorphous metal 232 and the magnetic yoke 13, the second edge amorphous metal 232 forms a closed ring structure, and the second edge magnet 231 includes a plurality of second sub-magnets, and a second air flow gap is formed between adjacent second sub-magnets, and the second air flow gap is connected to the second magnetic gap and the space outside the sound generating device. In this way, the circulation of air flow in the vibration cavity of the sound generating device and the external air flow is facilitated, the air pressure inside and outside the vibration cavity is balanced, the vibration stability of the diaphragm part 31 is improved, and the sound generating performance of the sound generating device is improved.

[0107] In the present embodiment, the second air flow gap can extend in the long axis direction of the magnetic circuit assembly, or the second air flow gap can extend in the short axis direction of the magnetic circuit assembly, or the second air flow gap is distributed at the four corner positions of the magnetic circuit assembly, which can ensure the air flow when the diaphragm part 31 vibrates.

[0108] In one embodiment, referring to FIG. 3, the second edge magnetic part 23 includes a second edge magnet 231 and a second edge amorphous metal 232, the second edge magnet 231 is clamped between the second edge amorphous metal 232 and the magnetic yoke 13, the second edge magnet 231 includes a plurality of second sub-magnets, a second air flow gap is formed between adjacent second sub-magnets, the second air flow gap is connected to the second magnetic gap and the space outside the sound generating device, the second edge amorphous metal 232 forms a closed ring structure, and the second edge amorphous metal 232 is provided with an air flow through hole 233.

[0109] In this embodiment, the airflow through hole 233 on the second side wall 232 can communicate the second magnetic gap and the space outside the sound generating device, so as to facilitate the airflow to flow outwards through the airflow through hole 233 when the diaphragm component 31 vibrates, avoid the air pressure on one side of the diaphragm component 31 being too large when the diaphragm component 31 vibrates, and ensure the sensitivity of the vibration of the diaphragm component 31.

[0110] In one embodiment, referring to FIGS. 3, 5 and 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, a first voice coil 321 and a second voice coil 322 are connected to the dome 312; wherein the dome 312 is provided with a protrusion 3121 on the side away from the diaphragm 311, and the first voice coil 321 is connected to the protrusion 3121.

[0111] 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, such as the dome 312 being attached to the inner side of the diaphragm 311; or a hollow region is provided on the diaphragm 311, and the dome 312 is connected to the hollow region.

[0112] The first voice coil 321 is connected to the protrusion 3121 on the inner side of the dome 312, which can facilitate supporting and bonding the first voice coil 321, and ensure the stability of the first voice coil 321; and 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, which ensures the consistency of the driving action of the first voice coil 321 and the second voice coil 322. Alternatively, the protrusion 3121 is recessed from the side of the dome 312 to the magnetic circuit assembly 2.

[0113] In one embodiment, the dome 312 includes a first dome 3121 provided with 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 the welding of the second end of the centering sheet 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, which ensures the synchronization of the actions of the first voice coil 321 and the second voice coil 322.

[0114] In one embodiment, referring to FIG. 3, the conductive support 11 is provided with a first welding surface and a second welding surface facing away from each other, the first welding surface faces the centering sheet 323 and is connected to the centering sheet 323, and the second welding surface is used to connect to an external power supply.

[0115] In the embodiment, the first welding surface is not higher than the side surface of the magnetic circuit assembly 2 facing the diaphragm component 31. Since 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 the conductive support 11, thereby avoiding interference with the vibration of the vibration assembly 3. In an embodiment, the first welding surface is not higher than the side surface of the center magnetic component 21 facing the diaphragm component 31.

[0116] In an embodiment, the side of the conductive support 11 facing away from the first welding surface is provided with a groove, and the bottom wall of the groove forms a second welding surface. Thus, mounting space is provided for the conductive line or flexible circuit board for connecting the conductive support 11, and protection is provided for the conductive line or flexible circuit board.

[0117] In an embodiment, the conductive support 11 includes a main body and a conductive welding sheet embedded in the main body. The conductive welding sheet includes a first welding portion and a second welding portion connected to each other. At least part of the first welding portion is exposed to the first welding surface, and at least part of the second welding portion is exposed to the second welding surface. The conductive line or flexible circuit board connecting the external circuit is connected to the second pad portion of the second welding surface in conduction, thereby smoothly conducting the external current to the first voice coil 321 and the second voice coil 322 through the conductive support 11 and the centering support 323.

[0118] In an embodiment, the shell 1 includes a ring-shaped shell 14. One end of the ring-shaped shell 14 is connected to the magnetic yoke 13, and the other end of the ring-shaped shell 14 forms an opening 12. The conductive support 11 is arranged at the middle position inside the magnetic yoke 13.

[0119] In this embodiment, the mounting cavity is formed by connecting one end of the ring-shaped shell 14 to the magnetic yoke 13, which facilitates the installation of the magnetic circuit assembly 2 and the vibration assembly 3 in the mounting cavity and at the opening 12. The conductive support 11 is arranged at the middle position inside the magnetic yoke 13, which can connect the first voice coil 321 and the second voice coil 322 to the conductive support 11 through the centering support 323, thereby avoiding the occupation of the size of the first side magnetic component 22 and the second side magnetic component 23, and ensuring the stability of the magnetic circuit assembly 2 arranged inside the shell 1.

[0120] In one embodiment, referring to FIG. 3 and FIG. 10, the conductive support 11 is configured to be connected with an external electrical connector, the magnetic circuit assembly 2 is provided with a wire slot 131 on the side facing away from the diaphragm component 31, the periphery of the magnetic circuit assembly 2 is provided with a wire port 132, the wire slot 131 is in communication with the mounting through hole 214 and the wire port 132, and the electrical connector is arranged in the wire slot 131 and the wire port 132 and is electrically connected to the conductive support 11. In one embodiment, the magnetic yoke 13 is provided with a wire slot 131 on the side facing away from the diaphragm component 31, the periphery of the magnetic yoke is provided with a wire port 132, the wire slot 131 is in communication with the mounting through hole 214 and the wire port 132, and the electrical connector is arranged in the wire slot 131 and the wire port 132 and is electrically connected to the conductive support 11.

[0121] In this embodiment, the electrical connector can be a FPC (Flexible Printed Circuit) or a cable, the wire slot 131 can be a thinned area on the outer side of the magnetic yoke 13, the wire port 132 can be a through hole area on the outer side of the magnetic yoke 13, and the wire slot 131 and the wire port 132 provide a special passage for the electrical connector, so that the structure of the sound production device is more compact and the overall space is saved.

[0122] In one embodiment, the magnetic circuit assembly 2 and the magnetic yoke 13 are in an integral injection molding structure, which improves the stability of the arrangement of the conductive support 11. Specifically, the conductive support 11 and the magnetic yoke 13 are in an integral injection molding structure, or the conductive support 11 and the center magnetic plate 212 are in an integral injection molding structure.

[0123] In one embodiment, the present application provides an electronic device comprising the sound production device described above.

[0124] In this embodiment, the sound production device of the electronic device adopts a double-coil arrangement, the first coil 321 is connected to the diaphragm component 31 and suspended in the first magnetic gap, the second coil 322 is connected to the diaphragm component 31 and suspended in the second magnetic gap, and the centering spider 323 electrically connects the first coil 321 and the second coil 322 to the conductive support 11, which improves the magnetic field strength of the magnetic circuit assembly 2 and thus increases the BL value of the sound production device, thereby ensuring the acoustic performance of the electronic device.

[0125] 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.

[0126] While certain embodiments of the application have been described by way of example with specific reference to the drawings, it will be appreciated that the application is not limited by any of the examples described. It will be further appreciated that modifications can be made to the described embodiments without departing from the scope and spirit of the application. The scope of the application is defined in the claims that follow.

Claims

1. A sound producing device, characterized by, The application relates to a loudspeaker, which comprises the following parts: a shell with an opening; a magnetic circuit assembly arranged in the shell, the magnetic circuit assembly being provided with a mounting through hole and a first magnetic gap and a second magnetic gap; a vibration assembly comprising a diaphragm component and a voice coil component, the diaphragm component being connected to the opening, 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 the first magnetic gap, and the second voice coil being connected to the diaphragm component and suspended in the second magnetic gap; and a conductive support and a centering sheet, the conductive support being embedded in the mounting through hole, and the centering sheet electrically connecting the first voice coil and the second voice coil to the conductive support. The centering sheet has a first end, a second end and an intermediate part between the first end and the second end. The first end is connected to the diaphragm component and electrically connected to the first voice coil and the second voice coil, and the second end is electrically connected to the conductive support. The first end and the second end are located in different planes, the intermediate part comprises a vibration arm connected to the second end and located in the same plane, and a connecting part extending from the first end to the vibration arm and connected to the vibration arm. The vibration arm extends in a bent shape; and / or, a vibration space for avoiding the vibration arm is formed between the conductive support and the inner wall of the mounting through hole.

2. The sound production device of claim 1, wherein, The centering sheet is of an integrated structure, the first end comprises two parts and is arranged on both sides of the second end along the long axis direction or the short axis direction of the magnetic circuit assembly. Alternatively, the centering sheet comprises two parts, and the two parts are symmetrically distributed along the long axis direction or the short axis direction of the magnetic circuit assembly.

3. The sound production device of claim 2, wherein, The magnetic circuit assembly comprises a magnetic yoke, a central magnetic part, a first side magnetic part and a second side magnetic part, the first side magnetic part is arranged around the central magnetic part and forms a first magnetic gap with the central magnetic part, the second side magnetic part is arranged around the first side magnetic part and forms a second magnetic gap with the first side magnetic part, and the mounting through hole penetrates the magnetic yoke and the central magnetic part and is located in the central region of the magnetic circuit assembly. The central magnetic part comprises a central magnet and a central magnetic conducting plate, the central magnet is clamped between the central magnetic conducting plate and the magnetic yoke, and the mounting through hole penetrates the central magnet and the central magnetic conducting plate in sequence.

4. The sound production device of claim 2, wherein, A first avoiding structure is arranged on the side of the central magnetic conducting plate close to the vibration assembly, one end of the first avoiding structure is communicated with the mounting through hole, and the other end of the first avoiding structure extends towards the periphery of the central magnetic conducting plate, and the first avoiding structure comprises at least one of an avoiding groove and an avoiding hole for avoiding the intermediate part of the centering sheet. The first side magnetic part comprises a first side magnet and a first side amperometric sensor, and the first side magnet is clamped between the first side amperometric sensor and the magnetic yoke.

5. The sound production device of claim 1, wherein, The first side magnet and the first side amperometric sensor both form a closed ring structure; or, 6. The sound production device of claim 5, wherein, ​ 7. The sound production device of claim 6, wherein, ​ 8. The sound production device of claim 5, wherein, ​ ​ The first side magnets and the first side soft magnetic members are both multiple and are arranged one-to-one, and adjacent first side magnets are connected end to end to form a closed ring structure; or The first side soft magnetic members form a closed ring structure, and the first side magnets include multiple first sub-magnets, and first air flow gaps are formed between adjacent first sub-magnets, and the first air flow gaps are communicated with the first magnetic gap and the second magnetic gap.

9. The sound production device of claim 8, wherein, The first side soft magnetic members are provided with second avoiding structures away from one side of the first side magnets, and the second avoiding structures include at least one of avoiding grooves and avoiding holes, and the second avoiding structures are used for avoiding the end of the centering support sheet and / or the lead of the voice coil component.

10. The sound production device of claim 5, wherein, The second side magnetic part includes second side magnets and second side soft magnetic members, and the second side magnets are clamped between the second side soft magnetic members and the magnetic yoke; The second side magnets and the second side soft magnetic members both form a closed ring structure; or The second side magnets and the second side soft magnetic members are both multiple and are arranged one-to-one, and adjacent second side magnets are connected end to end to form a closed ring structure; or The second side soft magnetic members form a closed ring structure, and the second side magnets include multiple second sub-magnets, and second air flow gaps are formed between adjacent second sub-magnets, and the second air flow gaps are communicated with the second magnetic gap and the space outside the sound generating device.

11. The sound production device of claim 5, wherein, The second side magnetic part includes second side magnets and second side soft magnetic members, and the second side magnets are clamped between the second side soft magnetic members and the magnetic yoke, the second side magnets include multiple second sub-magnets, and second air flow gaps are formed between adjacent second sub-magnets, and the second air flow gaps are communicated with the second magnetic gap and the space outside the sound generating device, and the second side soft magnetic members are provided with air flow through holes, and the air flow through holes are communicated with the second air flow gaps.

12. The sound production device of claim 1, wherein, The diaphragm part includes a diaphragm and a ball top, the diaphragm is connected to the opening, and the ball top is connected to the diaphragm; the first voice coil and the second voice coil are connected to the ball top; Wherein The ball top is provided with a protrusion away from one side of the diaphragm, and the first voice coil is connected to the protrusion.

13. The sound production device of claim 12, wherein, The ball top includes a first ball top provided with a through hole and a second ball top 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 ball top.

14. The sound production device of claim 1, wherein, The conductive support is provided with a first welding surface and a second welding surface facing away from each other, the first welding surface faces the centering support sheet and is connected to the centering support sheet, and the second welding surface is used for connecting an external power supply; Wherein, the first welding surface is not higher than the surface of the magnetic circuit assembly facing the diaphragm part.

15. The sound production device of claim 14, wherein, The conductive support is provided with a groove away from the first welding surface, and the bottom wall of the groove forms the second welding surface; And / or, the conductive support includes a main body and a conductive welding sheet, the conductive welding sheet is embedded in the main body, the conductive welding sheet includes a first welding part and a second welding part connected to each other, at least part of the first welding part is exposed to the first welding surface, and at least part of the second welding part is exposed to the second welding surface.

16. The sound production device of claim 1, wherein, The conductive support is used for connecting with an external electrical connector, a wire slot is arranged on a side of the magnetic circuit assembly away from the diaphragm component, a wire port is arranged on a periphery of the magnetic circuit assembly, the wire slot is communicated with the mounting through hole and the wire port, and the electrical connector is arranged in the wire slot and the wire port and electrically connected to the conductive support. And / or, the conductive support and the magnetic circuit assembly are an integral injection molding structure.

17. An electronic device, comprising: The sound production device comprises the sound production device according to any one of claims 1-16.

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