Sound production device and electronic equipment

Abstract

The invention provides a sound production device and electronic equipment, the sound production device comprises a shell, a magnetic circuit assembly, a vibration assembly and a centering disk, the magnetic circuit assembly is provided with a first magnetic gap and a second magnetic gap, and the vibration assembly comprises a diaphragm component and a voice coil component. The voice coil component comprises a first voice coil arranged corresponding to the first magnetic gap and a second voice coil arranged corresponding to the second magnetic gap, the centering disk is electrically connected with the voice coil component and an external circuit, the centering disk comprises a connecting arm, a bending arm and a vibrating arm which are connected in sequence, the connecting arm is arranged on the vibrating diaphragm component and electrically connected to the first voice coil and the second voice coil, and the bending arm is arranged on the vibrating diaphragm component. The vibration arm extends in a bending shape, the bending arm is connected between the connecting arm and the vibration arm, and the bending arm extends along the vibration direction of the vibration assembly from the inner end of the vibration arm and is connected with the connecting arm, 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 transducers, and specifically, the present application relates to a sound-generating device and an electronic device. Background Art

[0002] As an important electroacoustic transducer component, the sound-generating device can provide a guarantee for the sound generation of electronic devices such as speakers, receivers, headphones and mobile phones. With the improvement of the performance of electronic devices, the improvement of the acoustic performance of the sound-generating device is also an inevitable trend. In order to achieve better acoustic performance, the sound-generating device often needs to be equipped with a larger magnetic circuit system 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 at 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. Summary of the invention

[0004] One purpose of the embodiments of the present application is to provide a new technical solution for a sound-generating 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] case;

[0007] A magnetic circuit component, the magnetic circuit component is arranged in the housing, the magnetic circuit component comprises a magnetic yoke and a central magnetic part, a first side magnetic part and a second side magnetic part arranged on the magnetic yoke; 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;

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

[0009] A centering support plate, wherein the centering support plate is electrically connected to the voice coil component and an external circuit, and the centering support plate includes a connecting arm, a bending arm and a vibration arm connected in sequence, wherein the connecting arm is arranged on the diaphragm component and is electrically connected to the first voice coil and the second voice coil, wherein the outer end of the vibration arm is connected to the shell and extends inward in a bending shape, wherein the bending arm is connected between the connecting arm and the vibration arm and the bending arm extends from the inner end of the vibration arm along the vibration direction of the vibration component and is connected to the connecting arm.

[0010] Optionally, the connecting arm and the vibration arm are located in different planes, and a second avoidance structure for avoiding the vibration arm is formed on an outer peripheral side of the second edge magnetic portion.

[0011] Optionally, the first side magnetic portion includes a first side magnet and a first side magnetic conductive plate, and the first side magnet is sandwiched between the first side magnetic conductive plate and the magnetic conductive yoke;

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

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

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

[0015] Optionally, the first side magnetic conductive plate is provided with a first avoidance structure, the first avoidance structure comprising a first avoidance groove formed by a depression on one side of the first side magnetic conductive plate away from the first side magnet and / or a avoidance hole passing through the first side magnetic conductive plate, the first avoidance structure being used to avoid the connecting arm of the centering support plate and / or the lead of the voice coil component.

[0016] Optionally, the second side magnetic portion includes a second side magnet and a second side magnetic conductive plate, and the second side magnet is sandwiched between the second side magnetic conductive plate and the magnetic conductive yoke;

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

[0018] There are a plurality of second side magnets, and adjacent second side magnets are connected end to end to form a closed ring structure; or,

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

[0020] Optionally, the centering support plates include two, and the two centering support plates are arranged on both sides of the long axis direction of the magnetic circuit component;

[0021] The second side magnetic part comprises a second side magnet and a second side magnetic conductive plate, and the second side magnet is sandwiched between the second side magnetic conductive plate and the magnetic conductive yoke;

[0022] The second side magnets include short side magnets located on both sides of the long axis direction of the magnetic circuit assembly and long side magnets located on both sides of the short axis direction of the magnetic circuit assembly, and the second avoidance structure is at least partially formed on the outer peripheral side of the short side magnets.

[0023] Optionally, each of the centering support plates includes two vibration arms arranged corresponding to the two ends of the short side magnet, and the two vibration arms are respectively connected to the two ends of the connecting arm through a bending arm;

[0024] Both ends of the short side magnet are provided with second avoidance grooves corresponding to the vibration arm on one side facing the shell, and the second avoidance grooves form a part of the second avoidance structure.

[0025] Optionally, the connecting arm includes a U-shaped portion, the opening of the U-shaped portion faces the shell, the U-shaped portion includes a first arm respectively connected to the two bending arms and a second arm connecting the two first arms, the second arm is located between the first voice coil and the second voice coil, and the second arm is provided with a soldering pad for connecting the first voice coil and the second voice coil.

[0026] Optionally, the second arm of one of the connecting arms is provided with two pads electrically connecting the lead-in end of the first voice coil and the lead-out end of the second voice coil;

[0027] The second arm of the other connecting arm is provided with two pads electrically connecting the lead-out end of the first voice coil and the lead-in end of the second voice coil.

[0028] Optionally, the short side magnet includes a protrusion located between the two second avoidance grooves, and the outer wall surface of the protrusion is exposed to the outer wall surface of the shell; or the outer wall surface of the protrusion is flush with the outer wall surface of the shell;

[0029] And / or, the short side magnet comprises a protrusion located between the two second avoidance grooves, and the two bent arms of the same centering support plate are arranged close to two end surfaces of the protrusion along the short axis direction of the magnetic circuit assembly;

[0030] And / or, ends of the two vibration arms of each of the centering support plates are fixed to corners of the shell.

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

[0032] Optionally, the hollow portion includes a first hollow portion opposite to the vibration arm and a second hollow portion opposite to the bending arm, the first hollow portion is connected to the second hollow portion, and the second hollow portion passes through the inner wall surface of the second magnetic conductive plate.

[0033] Optionally, the first hollow portion and the second magnetic conductive plate portion enclosed inside the second hollow portion form a magnetic conductive extension portion, and the two magnetic conductive extension portions cover both ends of the short side magnet.

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

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

[0036] Optionally, the ball top is provided with an extension arm bent toward the vibration arm, the extension arm is connected to the vibration arm, and the extension arm includes a plurality of extension arms, which correspond to the vibration arms one by one.

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

[0038] A technical effect of this application is:

[0039] An embodiment of the present application provides a sound-generating device, which includes a shell, a magnetic circuit component, a vibration component and a centering support plate, the centering support plate includes a connecting arm, a bending arm and a vibration arm, the connecting arm is arranged on the diaphragm component and is electrically connected to the first voice coil and the second voice coil, the vibration arm extends in a bent shape, the bending arm is connected between the connecting arm and the vibration arm, and the bending arm extends from the inner end of the vibration arm along the vibration direction of the vibration component and is connected to the connecting arm, thereby improving the magnetic field strength of the magnetic circuit component, thereby increasing the BL value of the sound-generating device and ensuring the acoustic performance of the sound-generating device.

[0040] Other features and advantages of 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

[0041] 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.

[0042] Figure 1 A stereoscopic sound device provided by an embodiment of the present application Figure 1 ;

[0043] Figure 2 A stereoscopic sound device provided by an embodiment of the present application Figure 2 ;

[0044] Figure 3An exploded view of a sound-generating device provided in one embodiment of the present application;

[0045] Figure 4 A schematic diagram of a centering support piece of a sound-generating device provided in one embodiment of the present application;

[0046] Figure 5 A front view schematic diagram of the connection of a voice coil component of a sound-generating device provided by one embodiment of the present application;

[0047] Figure 6 A schematic diagram of the back side of a voice coil component connection of a sound-generating device provided by one embodiment of the present application;

[0048] Figure 7 A schematic diagram of a first side magnetic conductive plate of a sound-generating device provided in one embodiment of the present application;

[0049] Figure 8 A schematic diagram of the front connection of the second side magnetic conductive plate of a sound-generating device provided by one embodiment of the present application;

[0050] Fig. 9 A schematic diagram of the back connection of the second side magnetic conductive plate of a sound-generating device provided by one embodiment of the present application;

[0051] Fig.10 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] Fig.11 A front schematic diagram of a sound-generating device provided by one embodiment of the present application;

[0053] Fig.12 for Fig.11 Cross-section along the AA plane;

[0054] Fig.13 for Fig.11 Cross-section along the BB plane;

[0055] Fig.14 for Fig.13 A partial enlarged view of the

[0056] Fig.15 for Fig.11 Cross-sectional view along the CC plane.

[0057] in:

[0058] 1. housing; 11. annular housing; 12. opening;

[0059] 2. Magnetic circuit components;

[0060] 21. Central magnetic part; 211. Central magnet; 212. Central magnetic plate;

[0061] 22. first side magnetic part; 221. first side magnet; 222. first side magnetic plate; 223. first avoidance structure;

[0062] 23, second side magnetic portion; 231, second side magnet; 232, second side magnetic plate; 2321, magnetic extension portion; 233, second avoidance structure; 2331, hollow portion; 2331', first hollow portion; 2331", second hollow portion; 2332, second avoidance groove; 2333, protruding portion;

[0063] 24. Magnetic yoke;

[0064] 3. Vibration components;

[0065] 31. diaphragm component; 311. diaphragm; 312. dome; 3121. extension arm;

[0066] 32. Voice coil component; 321. First voice coil; 322. Second voice coil;

[0067] 4. Centering support sheet; 401. Connecting arm; 402. Bending arm; 403. Vibrating arm;

[0068] 4', first centering support plate; 401', first connecting arm; 402', first bending arm; 403', first vibrating arm; 4", second centering support plate; 401", second connecting arm; 402", second bending arm; 403", second vibrating arm. DETAILED DESCRIPTION

[0069] 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 arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0070] 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 the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0071] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means 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 objects connected before and after are in an "or" relationship.

[0072] 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 referred device or element 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.

[0073] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0074] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0075] An embodiment of the present application provides a sound-generating device, which can be applied to electronic equipment.

[0076] Reference Figures 1 to 3 , an embodiment of the present application provides a sound-generating device, the sound-generating device comprising:

[0077] Shell 1;

[0078] The magnetic circuit component 2 is arranged in the housing 1, and the magnetic circuit component 2 includes a magnetic yoke 24 and a central magnetic portion 21, a first side magnetic portion 22 and a second side magnetic portion 23 arranged on the magnetic yoke 24. The first side magnetic portion 22 is arranged around the central magnetic portion 21 and forms a first magnetic gap with the central magnetic portion 21. The second side magnetic portion 23 is arranged around the first side magnetic portion 22 and forms a second magnetic gap with the first side magnetic portion 22.

[0079] A vibration assembly 3, the vibration assembly 3 includes a diaphragm component 31 and a voice coil component 32, the diaphragm component 31 is connected to the housing 1, the voice coil component 32 includes a first voice coil 321 and a second voice coil 322, the first voice coil 321 is connected to the diaphragm component 31 and suspended in the first magnetic gap, and the second voice coil 322 is connected to the diaphragm component 31 and suspended in the second magnetic gap; and

[0080] The centering support plate 4 is electrically connected to the voice coil component 32 and the external circuit. The centering support plate 4 includes a connecting arm 401, a bending arm 402 and a vibration arm 403 which are connected in sequence. The connecting arm 401 is arranged on the diaphragm component 31 and is electrically connected to the first voice coil 321 and the second voice coil 322. The outer end of the vibration arm 403 is connected to the shell 1 and extends inward in a bent shape. The bending arm 402 is connected between the connecting arm 401 and the vibration arm 403 and the bending arm 402 extends from the inner end of the vibration arm 403 along the vibration direction of the vibration component 3 and is connected to the connecting arm 401.

[0081] 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 a basis for assembling components such as the magnetic circuit assembly 2 and the vibration assembly 3 .

[0082] In one embodiment, the shell has an opening 12, and 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.

[0083] In a specific embodiment, Figure 1 and Figure 3 As shown, the magnetic circuit component 2 is assembled at one end of the shell 1, the vibration component 3 is connected to the other end of the shell, 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.

[0084] In this embodiment, when the sound-generating device is applied to an electronic device, a power supply and a circuit may be provided in the electronic device, and the centering support plate is electrically connected to the voice coil component 32 and the external circuit, and is electrically connected to the power supply through the external circuit to ensure the efficiency and stability of the power supply to the voice coil component 32.

[0085] In this embodiment, the central magnetic portion 21, the first side magnetic portion 22 and the second side magnetic portion 23 form a magnetic circuit magnetic portion, the magnetic yoke 24 and the magnetic circuit magnetic portion of the magnetic circuit component 2 are stacked up and down, and the central magnetic portion 21, the first side magnetic portion 22 and the second side magnetic portion 23 of the magnetic circuit component 2 are arranged in sequence from the inside to the outside. On the basis that the magnetic yoke 24 supports the central magnetic portion 21, the first side magnetic portion 22 and the second side magnetic portion 23, the magnetic circuit component 2 can be connected to the shell 1 through the periphery of the outermost second side magnetic portion 23 to ensure the stability of the magnetic circuit component 2 arranged inside the shell 1.

[0086] In this embodiment, 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, thereby connecting one end of the first voice coil 321 to the diaphragm component 31, and the other end of the first voice coil 321 is suspended in the first magnetic gap. When current is passed through the first voice coil 321, the first voice coil 321 vibrates back and forth in the first magnetic gap formed by the magnetic circuit 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-generating device.

[0087] 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, and the other end of the second voice coil 322 is suspended in the second magnetic gap. When current is passed through the second voice coil 322, the second voice coil 322 vibrates back and forth in the second magnetic gap formed by the magnetic circuit assembly 2, 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.

[0088] In this embodiment, by connecting the connecting arm 401 of the centering support plate 4 to the diaphragm component 31, that is, placing the connecting arm 401 on the upper surface of the first voice coil 321 and the second voice coil 322 for welding and conduction, a stable electrical conduction path is provided for the first voice coil 321 and the second voice coil 322; and the connecting arm 401 is fixed to the diaphragm component 31, and the bending arm 402 extends along the vibration direction of the vibration component. On the basis of ensuring the setting stability of the centering support plate 4, it is avoided that the bending arm 402 in the prior art often occupies the setting space of the magnetic circuit component 2 due to being set in the corner area of ​​the magnetic circuit component 2 and extending horizontally, so that the magnetic circuit component 2 can increase the setting volume to improve the magnetic field strength of the magnetic circuit component 2, and then the BL value (driving strength value) of the sound-emitting device can be improved to ensure the acoustic performance of the sound-emitting device.

[0089] In this embodiment, the outer end of the vibration arm 403 is the end of the vibration arm 403 away from the connecting arm 401, and the inner end of the vibration arm 403 is the end of the vibration arm 403 close to the connecting arm 401. The vibration arm 403 extends in a bent shape in the direction from its outer end to the inner end, that is, the vibration arm 403 has at least one bend, so as to realize the deformation of the centering support plate 4 through the vibration arm 403, and play a centering role in the reciprocating vibration of the first voice coil 321 and the second voice coil 322 during the vibration of the diaphragm assembly.

[0090] The sound-generating device provided in the embodiment of the present application includes a shell 1, a magnetic circuit component 2 and a vibration component 3. The magnetic circuit component 2 is arranged in the shell 1. The magnetic circuit component 2 includes a magnetic yoke 24 and a central magnetic part 21, a first side magnetic part 22 and a second side magnetic part 23 arranged on the magnetic yoke 24; the first side magnetic part 22 is arranged around the central magnetic part 21, and a first magnetic gap is formed between the first side magnetic part 22 and the central magnetic part 21; the second side magnetic part 23 is arranged around the first side magnetic part 22, and a second magnetic gap is formed between the second side magnetic part 22; the vibration component 3 includes a diaphragm component 31 and a voice coil component 32, the diaphragm component 31 is connected to the shell, and the voice coil Component 32 includes a first voice coil 321 and a second voice coil 322, the first voice coil 321 is connected to the diaphragm component 31 and suspended in the first magnetic gap, the second voice coil 322 is connected to the diaphragm component 31 and suspended in the second magnetic gap; the centering support plate 4 includes a connecting arm 401, a bending arm 402 and a vibration arm 403 connected in sequence, the connecting arm 401 is arranged on the diaphragm component 31 and is electrically connected to the first voice coil 321 and the second voice coil 322, which improves the magnetic field strength of the magnetic circuit assembly 2, and then can increase the BL value (driving strength value) of the sound-emitting device, thereby ensuring the acoustic performance of the sound-emitting device.

[0091] In some embodiments, see Figure 3 and Figure 4 The connecting arm 401 and the vibration arm 403 are located in different planes, and a second avoidance structure 233 for avoiding the vibration arm 403 is formed on the outer peripheral side of the second edge magnetic portion 23 .

[0092] In this embodiment, the connecting arm 401 can electrically connect the leads of the first voice coil 321 and the leads of the second voice coil 322 when connected to the diaphragm component 31, so as to achieve circuit conduction from the centering support plate 4 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.

[0093] like Figure 4 As shown, the vibration arm 403 is connected to the outer side of the connecting arm 401 through the bending arm 402, and the connecting arm 401 and the vibration arm 403 are staggered, so that the bending arm 402 extends along the vibration direction of the vibration component 3, and a second avoidance structure 233 for avoiding the vibration arm 403 and the bending arm 402 is formed on the outer peripheral side of the second side magnetic part 23, so as to rationally utilize the setting space, avoid mutual interference between the centering support plate 4 and the magnetic circuit component 2, and improve the magnet utilization rate of the magnetic circuit component 2.

[0094] In one embodiment, the first voice coil 321 and the second voice coil 322 can be connected in series via the centering support plate 4 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 via the centering support plate 4, 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 first voice coil 321 and the second voice coil 322 in driving the vibration of the diaphragm component 31.

[0095] In some embodiments, the centering support plates 4 include two, and the two centering support plates 4 are symmetrically distributed along the long axis direction or the short axis direction of the magnetic circuit assembly 2, thereby improving the flexibility of the arrangement of the centering support plates 4 and facilitating the use of the assembly gap inside the sound-generating device to set the centering support plates 4.

[0096] In some embodiments, see Figure 5 , Figure 6 and Fig.10 The centering support plates 4 include two centering support plates 4 , which are arranged on both sides of the long axis direction of the magnetic circuit component 2 .

[0097] The second side magnetic portion 23 includes a second side magnet 231 and a second side magnetic conductive plate 232 . The second side magnet 231 is sandwiched between the second side magnetic conductive plate 232 and the magnetic conductive yoke 24 .

[0098] See also Fig.10 The second side magnet 231 includes short side magnets located on both sides of the long axis direction of the magnetic circuit component 2 and long side magnets located on both sides of the short axis direction of the magnetic circuit component 2, and the second avoidance structure 233 is at least partially formed on the outer peripheral side of the short side magnet.

[0099] In this embodiment, the second avoidance structure 233 is at least partially formed on the outer peripheral side of the short side magnet, which facilitates the connection of the connecting arm 401 of the centering support plate 4 with the lead of the voice coil component 32 on the short side magnet side, reduces the extended length of the connecting arm 401 and the vibration arm 403, further reduces the space occupied by the magnetic circuit assembly 2, and helps to reduce production costs.

[0100] In some embodiments, see Figures 4 to 6 Each centering support plate 4 includes two vibration arms 403 arranged at the two ends of the short side magnet, and the two vibration arms 403 are connected to the two ends of the connecting arm 401 through a bending arm 402 respectively;

[0101] See also Fig.10 Both ends of the short side magnet are provided with a second avoidance groove 2332 corresponding to the vibration arm 403 on one side facing the housing 1 , and the second avoidance groove 2332 forms a part of the second avoidance structure 233 .

[0102] In this embodiment, the connecting arm 401 is electrically connected to the leads of the first voice coil 321 and the second voice coil 322 ; a power path connected to an external circuit is formed through two vibration arms 403 , thereby ensuring current transmission between the first voice coil 321 and the second voice coil 322 .

[0103] In some embodiments, see Figures 3 to 6 The connecting arm 401 includes a U-shaped portion, the opening of the U-shaped portion faces the shell 1, the U-shaped portion includes a first arm and a second arm, the two first arms are respectively connected to the two bending arms 402, the second arm connects the two first arms, the second arm is located between the first voice coil 321 and the second voice coil 322, and the second arm is provided with a soldering pad for connecting the first voice coil 321 and the second voice coil 322, so that the first voice coil 321 and the second voice coil 322 can be connected through a connecting arm 401, thereby simplifying the structure of the sound-generating device.

[0104] In some embodiments, the sound-generating device comprises two centering supports 4, each of which comprises a connecting arm 401, see Figure 3 and Figure 4 , two pads are provided on the second arm of one connecting arm 401, one pad is electrically connected to the lead-in end of the first voice coil 321, and the other pad is electrically connected to the lead-out end of the second voice coil 322;

[0105] The second arm of the other connecting arm 401 has two pads, one of which is electrically connected to the lead-out end of the first voice coil 321 , and the other is electrically connected to the lead-in end of the second voice coil 322 , so as to realize the series connection of the first voice coil 321 and the second voice coil 322 .

[0106] In a specific embodiment, see Figure 5 and Figure 6 The centering support plate 4 includes a first centering support plate 4' and a second centering support plate 4", and the first centering support plate 4' and the second centering support plate 4" are symmetrically distributed along the long axis direction of the magnetic circuit assembly;

[0107] The first centering support 4′ includes a first connecting arm 401′, a first bending arm 402′ and a first vibrating arm 403′, wherein the first connecting arm 401′ is disposed on the diaphragm component 31 and is electrically connected to the lead-in end of the first voice coil 321 and the lead-out end of the second voice coil 322, the first bending arm 402′ is connected between the first connecting arm 401′ and the first vibrating arm 403′, and the first bending arm 402′ and the first vibrating arm 403′ are disposed between the outer peripheral side of the second edge magnet portion 23 and the housing 1;

[0108] The second centering support plate 4″ includes a second connecting arm 401″, a second bending arm 402″ and a second vibration arm 403″, the second connecting arm 401″ is arranged on the diaphragm component 31 and is electrically connected to the lead-out end of the first voice coil 321 and the lead-in end of the second voice coil 322, the second bending arm 402″ is connected between the second connecting arm 401″ and the second vibration arm 403″, and the second bending arm 402″ and the second vibration arm 403″ are arranged between the outer peripheral side of the second edge magnet portion 23 and the shell 1.

[0109] In some embodiments, see Fig.10 , the short side magnet includes a protruding portion 2333 , and two second avoidance grooves 2332 are located on both sides of the protruding portion 2333 ;

[0110] The outer wall surface of the protrusion 2333 is exposed on the outer wall surface of the shell 1 to increase the volume of the short side magnet; or the outer wall surface of the protrusion 2333 is flush with the outer wall surface of the shell 1 to ensure the regular structure of the sound-generating device.

[0111] In some embodiments, the short side magnet includes a protrusion 2333, and two second avoidance grooves 2332 are located on both sides of the protrusion 2333; along the short axis direction of the magnetic circuit assembly 2, the two bent arms 402 of the same centering support plate 4 are arranged close to the two end faces of the protrusion 2333 to improve the structural compactness of the sound-generating device.

[0112] In some embodiments, the ends of the two vibration arms 403 of each centering support piece 4 are fixed to the corners of the shell 1, that is, the outer ends of the vibration arms 403 of each centering support piece 4 are correspondingly fixed to the four corners of the shell 1 for easy positioning and assembly.

[0113] In one embodiment, see Figure 3 and Figure 7 The first side magnetic portion 22 includes a first side magnet 221 and a first side magnetic conductive plate 222 . The first side magnet 221 is sandwiched between the first side magnetic conductive plate 222 and the magnetic conductive yoke 24 .

[0114] In this embodiment, optionally, the first side magnet 221 is a closed ring structure; or, there are multiple first side magnets 221, and adjacent first side magnets 221 are connected end to end to form a closed ring structure.

[0115] In this embodiment, the first side magnet 221 is sandwiched between the first side magnetic conductive plate 222 and the magnetic conductive yoke 24 . This clamping method provides stable support for the first side magnet 221 and can prevent the first side magnet 221 from being displaced or loosened.

[0116] In this embodiment, the first side magnet 221 forms a closed ring structure, which helps to generate a more uniform and stable magnetic field in the magnetic gap of the sound-generating device.

[0117] In some embodiments, see Figure 7 The first side magnetic portion 22 includes a first side magnet 221 and a first side magnetic conductive plate 222 , and the first side magnet 221 is sandwiched between the first side magnetic conductive plate 222 and the magnetic conductive yoke 24 ;

[0118] The first side magnetic conductive plate 222 is provided with a first avoidance structure 223. The first avoidance structure 223 is formed by a first avoidance groove recessed on one side of the first side magnetic conductive plate 222 away from the first side magnet 221 and / or a avoidance hole penetrating the first side magnetic conductive plate 222. The first avoidance structure 223 is used to avoid the connecting arm 401 of the centering support plate 4 and / or the lead of the voice coil component 32.

[0119] In this embodiment, the centering support 4 includes a connecting arm 401, a bending arm 402 and a vibration arm 403. The connecting arm 401 is arranged on the diaphragm component 31 and is electrically connected to the first voice coil 321 and the second voice coil 322. The vibration arm 403 extends in a bent shape. The bending arm 402 extends along the vibration direction and is connected between the connecting arm 401 and the vibration arm 403. The first avoidance structure 223 is used to avoid the connecting arm 401 of the centering support 4, or further used to avoid the lead wire of the voice coil component 32. In this way, the first avoidance structure 223 can be a thinned area on the first side magnetic conductive plate 222 or a through hole penetrating the first side magnetic conductive plate 222, so that the connecting arm 401 of the centering support 4 and / or the lead wire of the voice coil component 32 are avoided by the first avoidance structure 223, so that there is no physical interference between the first side magnetic part 22 and the centering support 4, ensuring that the vibration component 3 can vibrate freely, and its vibration performance will not be affected by the space limitation of the first side magnetic part 22.

[0120] In one embodiment, see Figure 3 The first side magnetic portion 22 includes a first side magnet 221 and a first side magnetic conductive plate 222. The first side magnet 221 is sandwiched between the first side magnetic conductive plate 222 and the magnetic conductive yoke 24. The first side magnet 221 includes a plurality of first sub-magnets. A first airflow gap is formed between adjacent first sub-magnets. The first airflow gap connects the first magnetic gap and the second magnetic gap.

[0121] In this embodiment, a first airflow gap is left between adjacent first sub-magnets to facilitate the airflow to flow through the first magnetic gap and the second magnetic gap in the sound-generating device when the diaphragm component 31 vibrates, thereby improving the gas flowability in the vibration space, avoiding excessive air pressure on one side of the diaphragm component 31 when vibrating, and improving the vibration balance of the diaphragm component 31.

[0122] 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. It can be flexibly selected according to actual conditions.

[0123] In some embodiments, see Figure 3 The central magnetic part 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 24. 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 sandwiched between the central magnetic plate 212 and the magnetic yoke 24. This clamping method provides stable support for the central magnet 211 and can prevent the central magnet 211 from being displaced or loosened.

[0124] In one embodiment, see Figure 3 , Figure 8 and Fig. 9 The second side magnetic portion 23 includes a second side magnet 231 and a second side magnetic conductive plate 232 , and the second side magnet 231 is sandwiched between the second side magnetic conductive plate 232 and the magnetic conductive yoke.

[0125] Optionally, the second side magnet 231 forms a closed ring 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 adjacent second side magnets 231 are connected end to end to form a closed ring structure to improve the stability of the magnetic circuit assembly 2, or the second side magnet 231 includes multiple second sub-magnets, and a second airflow gap is formed between adjacent second sub-magnets, and the second airflow gap connects the second magnetic gap and the space outside the sound-emitting device. In this way, the airflow in the vibration cavity of the sound-emitting device and the external airflow are circulated, so that 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-emitting device is improved.

[0126] 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.

[0127] In some embodiments, see Figure 8 and Fig. 9 The second side magnetic portion 23 includes a second side magnet 231 and a second side magnetic conductive plate 232, and the second side magnet 231 is sandwiched between the second side magnetic conductive plate 232 and the magnetic conductive yoke;

[0128] A hollow portion 2331 is disposed on the second side magnetic conductive plate 232 , and the hollow portion 2331 constitutes at least a portion of the second avoidance structure 233 , that is, the hollow portion 2331 forms a part of the second avoidance structure 233 .

[0129] The hollow portion 2331 includes a first hollow portion 2331 ′ opposite to the vibration arm 403 and a second hollow portion 2331 ″ opposite to the bending arm 402 . The first hollow portion 2331 ′ is connected to the second hollow portion 2331 ″, and the second hollow portion 2331 ″ penetrates the inner wall surface of the second side magnetic conductive plate 232 .

[0130] In this embodiment, the centering support plate 4 includes a connecting arm 401, a bending arm 402 and a vibration arm 403. The connecting arm 401 is arranged between the diaphragm component 31 and the voice coil component 32 and is electrically connected to the first voice coil 321 and the second voice coil 322. The vibration arm 403 extends in a bent shape. The first hollow portion 2331′ can facilitate the insertion of the vibration arm 403. The bending arm 402 is inserted into the second hollow portion 2331", and the second hollow portion 2331" penetrates the inner wall surface of the second side magnetic conductive plate 232 inwardly. The ends of the bending arm 402 located at both ends of the second hollow portion 2331" are respectively connected to between the connecting arm 401 and the vibration arm 403, so as to extend the vibration arm 403 to the outer peripheral side of the second side magnetic portion 23.

[0131] In some embodiments, see Figure 8 and Fig.10 , the second side magnet 231 includes short side magnets located on both sides of the long axis direction of the magnetic circuit component 2, and the second side magnet 231 includes long side magnets located on both sides of the short axis direction of the magnetic circuit component 2;

[0132] The second side magnetic conductive plate 232 part enclosed by the first hollow part 2331′ and the second hollow part 2331″ forms a magnetic conductive extension part 2321. The two magnetic conductive extension parts 2321 cover the two ends of the short side magnet, so as to converge the magnetic field of the second side magnet 231 to the center by the magnetic conductive extension parts 2321, thereby improving the magnetic field strength of the magnetic circuit assembly 2.

[0133] In one embodiment, see Figure 3 and Fig.10 The second side magnet 231 includes a plurality of second sub-magnets, a second airflow gap is formed between adjacent second sub-magnets, and the hollow portion 2331 is connected to the second airflow gap.

[0134] In this embodiment, the second side magnetic portion 23 includes a second side magnet 231 and a second side magnetic conductive plate 232. The second side magnet 231 is sandwiched between the second side magnetic conductive plate 232 and the magnetic conductive yoke 24. The second side magnet 231 includes a plurality of second sub-magnets. A second airflow gap is formed between adjacent second sub-magnets. The second airflow gap connects the second magnetic gap and the space outside the sound-emitting device. The second side magnetic conductive plate 232 forms a closed ring structure. A hollow portion 2331 is provided on the second side magnetic conductive plate 232.

[0135] In this embodiment, the hollow portion 2331 on the second side magnetic conductive plate 232 can connect the second magnetic gap and the space outside the sound-emitting device, so that the airflow can flow outward through the hollow portion 2331 when the diaphragm component 31 vibrates, thereby avoiding excessive air pressure on one side of the diaphragm component 31 when it vibrates, thereby ensuring the sensitivity of vibration of the diaphragm component 31.

[0136] In some embodiments, the diaphragm component 31 includes a diaphragm 311 and a dome 312 , the diaphragm 311 is connected to the housing, the dome 312 is connected to the diaphragm 311 , the first voice coil 321 and the second voice coil 322 are connected to the dome 312 , and the connecting arm 401 is connected to the dome 312 .

[0137] In this embodiment, when the dome 312 is connected to the diaphragm 311 , the dome 312 may be connected to the center of the diaphragm 311 ; or a hollow area is provided on the diaphragm 311 , and the dome 312 covers the hollow area.

[0138] In one embodiment, see Figures 11 to 15 The ball top 312 is provided with an extension arm 3121 bent toward the vibration arm 403, the extension arm 3121 is connected to the vibration arm 403, the extension arm 3121 includes multiple, and the multiple extension arms 3121 are connected to the multiple vibration arms 403 in a one-to-one correspondence. In this way, the stability of the connection between the centering support plate 4 and the ball top 312 and the consistency of the reciprocating vibration are further improved.

[0139] In one embodiment, the present application provides an electronic device, which includes the above-mentioned sound-generating device.

[0140] 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 plate 4 is electrically connected to the first voice coil 321 and the second voice coil 322, 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.

[0141] 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.

[0142] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting 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: case; A magnetic circuit assembly, the magnetic circuit assembly is arranged in the housing, the magnetic circuit assembly includes a magnetic yoke and a central magnetic portion, a first side magnetic portion and a second side magnetic portion 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; A vibration assembly, the vibration assembly comprising a diaphragm component and a voice coil component, the diaphragm component is connected to the housing, 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 suspended in the first magnetic gap, the second voice coil is connected to the diaphragm component and suspended in the second magnetic gap; as well as A centering support plate, wherein the centering support plate is electrically connected to the voice coil component and an external circuit, and the centering support plate includes a connecting arm, a bending arm and a vibration arm connected in sequence, wherein the connecting arm is arranged on the diaphragm component and is electrically connected to the first voice coil and the second voice coil, wherein the outer end of the vibration arm is connected to the shell and extends inward in a bending shape, wherein the bending arm is connected between the connecting arm and the vibration arm and the bending arm extends from the inner end of the vibration arm along the vibration direction of the vibration component and is connected to the connecting arm.

2. The sound generating device according to claim 1, characterized in that: The connecting arm and the vibrating arm are located in different planes; A second avoidance structure for avoiding the vibration arm is formed on the outer peripheral side of the second edge magnet portion.

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

4. The sound-generating device according to claim 3, characterized in that: The first side magnetic conductive plate is provided with a first avoidance structure, the first avoidance structure comprising a first avoidance groove formed by a depression on one side of the first side magnetic conductive plate away from the first side magnet and / or a avoidance hole passing through the first side magnetic conductive plate, the first avoidance structure is used to avoid the connecting arm of the centering support plate and / or the lead of the voice coil component.

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

6. The sound generating device according to claim 2, characterized in that: The centering support plates include two, and the two centering support plates are arranged on both sides of the long axis direction of the magnetic circuit component; The second side magnetic part comprises a second side magnet and a second side magnetic conductive plate, and the second side magnet is sandwiched between the second side magnetic conductive plate and the magnetic conductive yoke; The second side magnets include short side magnets located on both sides of the long axis direction of the magnetic circuit assembly and long side magnets located on both sides of the short axis direction of the magnetic circuit assembly, and the second avoidance structure is at least partially formed on the outer peripheral side of the short side magnets.

7. The sound generating device according to claim 6, characterized in that: Each of the centering support plates includes two vibration arms arranged corresponding to the two ends of the short side magnet, and the two vibration arms are respectively connected to the two ends of the connecting arm through a bending arm; Both ends of the short side magnet are provided with second avoidance grooves corresponding to the vibration arm on one side facing the shell, and the second avoidance grooves form a part of the second avoidance structure.

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

9. The sound generating device according to claim 8, characterized in that: The second arm of one of the connecting arms is provided with two pads electrically connecting the lead-in end of the first voice coil and the lead-out end of the second voice coil; The second arm of the other connecting arm is provided with two pads electrically connecting the lead-out end of the first voice coil and the lead-in end of the second voice coil.

10. The sound generating device according to claim 6, characterized in that: The short side magnet comprises a protrusion located between the two second avoidance grooves, and the outer wall surface of the protrusion is exposed to the outer wall surface of the shell; or the outer wall surface of the protrusion is flush with the outer wall surface of the shell; And / or, the short side magnet comprises a protrusion located between the two second avoidance grooves, and the two bent arms of the same centering support sheet are arranged close to the two end surfaces of the protrusion along the short axis direction of the magnetic circuit assembly; And / or, ends of the two vibration arms of each of the centering support plates are fixed to corners of the shell.

11. The sound generating device according to claim 5, characterized in that: The second side magnetic conductive plate is provided with a hollow portion constituting at least a portion of the second avoidance structure.

12. The sound generating device according to claim 11, characterized in that: The hollow portion includes a first hollow portion opposite to the vibration arm and a second hollow portion opposite to the bending arm, the first hollow portion is connected to the second hollow portion, and the second hollow portion passes through the inner wall surface of the second side magnetic conductive plate.

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

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

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

16. The sound generating device according to claim 15, characterized in that: The ball top is provided with an extension arm bent toward the vibration arm, the extension arm is connected to the vibration arm, and the extension arm includes a plurality of extension arms, which correspond to the vibration arms one by one.

17. An electronic device, characterized in that: A sound-generating device comprising any one of claims 1-16.

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