Sound production device and acoustic equipment

Abstract

The embodiment of the invention discloses a sound production device and acoustic equipment. The sound production device comprises a cover body unit, a magnetic circuit unit and a vibration unit. A containing space is formed in the cover body unit, the cover body unit comprises a support, and leakage holes are formed in the side face of the support. The magnetic circuit unit is arranged in the accommodating space and is connected with the bracket; the vibration unit is arranged in the containing space and comprises a first vibration assembly and a second vibration assembly, and the first vibration assembly and the second vibration assembly are connected to the two sides of the support respectively in the vibration direction of the vibration unit and matched with the magnetic circuit unit on the two sides of the magnetic circuit unit. The first vibration assembly, the second vibration assembly, the support and the magnetic circuit unit define a rear cavity. And a leakage channel which is communicated with the rear cavity and the leakage hole is arranged between the magnetic circuit unit and the bracket. The sound production device provided by the invention enhances the sound production quality.

Description

Technical Field

[0001] The present application belongs to the field of acoustic technology, and specifically, the present application relates to a sound-generating device and an acoustic equipment. Background Art

[0002] Due to the limited size constraints of traditional sound-generating devices, the improvement of their vibration area and vibration displacement is very limited, resulting in the problem that the overall performance is difficult to be significantly enhanced, affecting the sound quality of the sound-generating device. Summary of the invention

[0003] One purpose of the embodiments of the present application is to provide a new technical solution for a sound-generating device and an acoustic equipment.

[0004] According to a first aspect of an embodiment of the present application, there is provided a sound-generating device, comprising:

[0005] A cover unit, wherein the cover unit has a storage space therein, and the cover unit includes a bracket, wherein the bracket has a top surface, a bottom surface, and a side surface located therebetween, and the side surface of the bracket is provided with a sound outlet hole communicating with the outside of the sound-generating device;

[0006] A magnetic circuit unit, which is disposed in the accommodation space and connected to the bracket;

[0007] A vibration unit, the vibration unit is arranged in the accommodation space, the vibration unit includes a first vibration component and a second vibration component, in the vibration direction of the vibration unit, the first vibration component and the second vibration component are respectively connected to the two sides of the bracket, and cooperate with the magnetic circuit unit on the two sides of the magnetic circuit unit, the first vibration component forms a first front cavity on the side away from the second vibration component, the second vibration component forms a second front cavity on the side away from the first vibration component, and the first vibration component, the second vibration component and the bracket surround a rear cavity;

[0008] Among them, in the vibration direction perpendicular to the vibration unit, the sound outlet hole at least partially corresponds to the magnetic circuit unit, the bracket is provided with a sound guide channel connecting the first front cavity, the second front cavity and the sound outlet hole, the side of the bracket is also provided with a leakage hole connected to the outside of the sound-emitting device, and a leakage channel connecting the rear cavity and the leakage hole is provided between the magnetic circuit unit and the bracket.

[0009] Optionally, the first vibration component, the bracket and the magnetic circuit unit enclose a first space, the second vibration component, the bracket and the magnetic circuit unit enclose a second space, and the rear cavity includes the first space and the second space;

[0010] A first channel and a second channel are respectively provided between the two sides of the magnetic circuit unit and the bracket, the leakage channel includes the first channel and the second channel, the first space is connected to the leakage hole through the first channel, and the second space is connected to the leakage hole through the second channel.

[0011] Optionally, the magnetic circuit unit comprises a yoke, a central magnetic part and a side magnetic part, the yoke has a middle accommodating area and a side accommodating area, the central magnetic part is arranged in the middle accommodating area, the side magnetic part is arranged in the side accommodating area, and the side magnetic part comprises a side magnet and a side washer which are arranged and stacked in sequence in the side accommodating area;

[0012] The portion of the yoke corresponding to the edge accommodating area is provided with a first notch along its periphery, the edge washer is provided with a second notch along its periphery, the first channel includes the first notch, and the second channel includes the second notch.

[0013] Optionally, the first notch and the second notch extend along the periphery of the edge accommodating area and the periphery of the edge washer respectively, and the extension length of the first notch accounts for 10% to 50% of the periphery of the edge accommodating area, and the extension length of the second notch accounts for 10% to 50% of the periphery of the edge washer.

[0014] Optionally, the first notch and the second notch are connected along the vibration direction of the vibration unit;

[0015] And / or, the bracket is provided with a third notch connected to the first notch, and a fourth notch connected to the second notch, the first channel also includes the third notch, the second channel also includes the fourth notch, and the third notch is connected to the fourth notch along the vibration direction of the vibration unit.

[0016] Optionally, the sound guiding channel includes a third channel that passes through the top surface of the bracket and connects the first front cavity and the sound outlet hole, and a fourth channel that passes through the bottom surface of the bracket and connects the second front cavity and the sound outlet hole. The first front cavity, the third channel, the second front cavity and the fourth channel are all isolated from the rear cavity.

[0017] Optionally, the bracket includes a circular portion and an extension portion protruding from the circular portion, the first vibration component and the second vibration component are both connected to the circular portion, and the third channel and the fourth channel are both arranged in the extension portion.

[0018] Optionally, the cover unit further comprises an upper cover and a lower cover, wherein the upper cover and the lower cover are respectively connected to two sides of the bracket;

[0019] The first front cavity is formed between the first vibration component and the upper cover, and the second front cavity is formed between the second vibration component and the lower cover;

[0020] The upper cover has a first protrusion away from the bracket, and the lower cover has a second protrusion away from the bracket. At least part of the first protrusion corresponds to the third channel, and at least part of the second protrusion corresponds to the fourth channel.

[0021] Optionally, in the vibration direction of the vibration unit, two sides of the magnetic circuit unit have a first magnetic gap and a second magnetic gap respectively;

[0022] The first vibration component includes a first diaphragm and a first voice coil connected to the first diaphragm, the second vibration component includes a second diaphragm and a second voice coil connected to the second diaphragm, at least a portion of the first voice coil is located in the first magnetic gap, and at least a portion of the second voice coil is located in the second magnetic gap.

[0023] Optionally, the bracket includes a first bracket and a second bracket, the first bracket and the second bracket are relatively connected, a side of the first bracket away from the second bracket forms the top surface, a side of the second bracket away from the first bracket forms the bottom surface, and the sound outlet hole and the leakage hole are both arranged between the first bracket and the second bracket;

[0024] And / or, two leakage holes are provided, and two leakage channels respectively connecting the two leakage holes and the rear cavity are provided between the magnetic circuit unit and the bracket.

[0025] Optionally, when the sound-emitting device emits sound, the first vibration component and the second vibration component radiate first sound waves of the same phase to the outside through the sound outlet hole, and the first vibration component and the second vibration component radiate second sound waves of opposite phase to the first sound wave to the outside through the leakage hole.

[0026] According to a second aspect of the present application, there is provided an acoustic device, characterized by the sound-generating device described in the first aspect.

[0027] Optionally, it further comprises a shell, wherein the sound-generating device is connected to the shell through the bracket;

[0028] The housing is provided with an external sound hole, the external sound hole is opposite to and connected with the sound outlet hole;

[0029] The shell is also provided with an external leakage hole, and an external rear cavity is provided between the shell and the cover unit. The rear cavity is connected to the external rear cavity through the leakage hole, and the external rear cavity is connected to the outside of the acoustic device through the external leakage hole.

[0030] A technical effect of this application is:

[0031] The present application provides a sound-generating device, which includes a cover unit, a magnetic circuit unit and a vibration unit, wherein the vibration unit includes a first vibration component and a second vibration component, wherein the first vibration component and the second vibration component respectively vibrate and cooperate with the magnetic circuit unit on both sides of the magnetic circuit unit in the vibration direction of the vibration component, and the first vibration component, the second vibration component, the bracket and the magnetic circuit unit form a back cavity; wherein a leakage channel connecting the back cavity and the leakage hole is provided between the magnetic circuit unit and the bracket, so that the back cavity is connected to the side surface of the bracket through the leakage channel, thereby enhancing the sound quality of the sound-generating device.

[0032] 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

[0033] 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.

[0034] Figure 1 One of the three-dimensional diagrams of a sound-generating device provided by one embodiment of the present application;

[0035] Figure 2 A second stereoscopic diagram of a sound-generating device provided by an embodiment of the present application;

[0036] Figure 3 One of the cross-sectional views of a sound-generating device provided by one embodiment of the present application;

[0037] Figure 4 A second cross-sectional view of a sound-generating device provided in one embodiment of the present application;

[0038] Figure 5 A schematic diagram of the external structure of a bracket and a vibration unit provided in one embodiment of the present application.

[0039] Figure 6 A three-dimensional diagram of an acoustic device provided for one embodiment of the present application;

[0040] Figure 7 A cross-sectional view of an acoustic device provided in accordance with an embodiment of the present application;

[0041] Figure 8 An exploded diagram of an acoustic device provided according to an embodiment of the present application.

[0042] Wherein: 1, cover unit; 11, bracket; 111, leakage hole; 112, sound outlet hole; 113, third notch; 114, fourth notch; 115, first bracket; 116, second bracket; 117, third channel; 118, fourth channel; 119, circular portion; 120, extension portion; 12, upper cover; 121, first protrusion; 13, lower cover; 131, second protrusion;

[0043] 2. Magnetic circuit unit; 21. Magnetic yoke; 211. Edge region; 2111. First notch; 22. Center magnetic part; 23. Edge magnetic part; 231. Edge washer; 2311. Second notch;

[0044] 3. Vibration unit; 31. First vibration component; 311. First voice coil; 312. First diaphragm; 32. Second vibration component; 321. Second voice coil; 322. Second diaphragm;

[0045] 4. Leakage channel; 41. First channel; 42. Second channel;

[0046] 100. housing; 101. external discharge hole; 102. external leakage hole. DETAILED DESCRIPTION

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] Reference Figures 1 to 4 According to a first aspect of an embodiment of the present application, a sound-generating device is provided, comprising: a cover unit 1, a magnetic circuit unit 2 and a vibration unit 3, wherein the cover unit 1 has a storage space therein, the cover unit 1 comprises a bracket 11, the bracket 11 has a top surface, a bottom surface and a side surface therebetween, the side surface of the bracket 11 is provided with a sound outlet hole 112 connected to the outside of the sound-generating device; the magnetic circuit unit 2 is arranged in the storage space and connected to the bracket 11; the vibration unit 3 is arranged in the storage space.

[0054] The vibration unit 3 includes a first vibration component 31 and a second vibration component 32. In the vibration direction of the vibration unit 3, the first vibration component 31 and the second vibration component 32 are respectively connected to the two sides of the bracket 11, and cooperate with the magnetic circuit unit 2 on both sides of the magnetic circuit unit 2. The side of the first vibration component 31 facing away from the second vibration component 32 forms a first front cavity, and the side of the second vibration component 32 facing away from the first vibration component 31 forms a second front cavity. The first vibration component 31, the second vibration component 32 and the bracket 11 surround a rear cavity.

[0055] Among them, in the vibration direction perpendicular to the vibration unit 3, the sound outlet hole 112 at least partially corresponds to the magnetic circuit unit 2, the bracket 11 is provided with a sound guide channel connecting the first front cavity, the second front cavity and the sound outlet hole 112, and the side of the bracket 11 is also provided with a leakage hole 111 connected to the outside of the sound-emitting device, and a leakage channel 4 connecting the rear cavity and the leakage hole 111 is provided between the magnetic circuit unit 2 and the bracket 11.

[0056] Specifically, in this embodiment, the first vibration component 31 and the second vibration component 32 can be Figure 3 The magnetic circuit unit 2 vibrates up and down in the vertical direction, and the upper and lower sides of the magnetic circuit unit 2 form a first magnetic gap and a second magnetic gap respectively, and the annular first magnetic gap is located inside the annular second magnetic gap. The first vibration component 31 and the second vibration component 32 cooperate with the magnetic circuit unit 2 on opposite sides of the magnetic circuit unit 2, that is, a part of the first vibration component 31 extends into the first magnetic gap, and a part of the second vibration component 32 extends into the second magnetic gap, so as to generate acoustic wave vibrations in the first front cavity and the second front cavity.

[0057] At least part of the sound outlet hole 112 is opposite to the magnetic circuit unit 2 in a direction perpendicular to the vibration direction of the vibration unit 3, for example Figure 4 At least a portion of the middle sound hole 112 is laterally opposite to the magnetic circuit unit 2, so the sound hole 112 can be set at a position opposite to the area between the first vibration component 31 and the second vibration component 32, so that the sound wave vibration generated in the two front cavities on the outside of the first vibration component 31 and the outside of the second vibration component 32 can be quickly transmitted to the sound hole 112 and converge at the sound hole 112 to produce sound, thereby improving the sound efficiency and sound intensity of the sound-emitting device.

[0058] In this embodiment, the first vibration component 31 and the second vibration component 32 on both sides of the magnetic circuit unit 2 can cooperate with the magnetic circuit unit 2, that is, the first vibration component 31 and the second vibration component 32 share a magnetic circuit unit 2, thereby improving the structural compactness of the sound-generating device.

[0059] In this embodiment, the bracket 11 is arranged in the accommodating space inside the cover unit 1, and the bracket 11 forms a top surface toward the upper side of the cover unit 1, and the bracket 11 forms a bottom surface toward the lower side of the cover unit 1. The side surface of the bracket 11 is adjacent to the top surface and the bottom surface and can be directly exposed from the cover unit 1. The sound hole 112 is arranged on the side of the bracket 11 to facilitate the side sound of the sound-emitting device and improve the sound efficiency of the sound-emitting device.

[0060] When the sound-emitting device is in a sound-emitting state, the first vibration component 31 and the second vibration component 32 vibrate towards each other to increase the vibration intensity of the sound-emitting device; and a sound guide channel is provided on the bracket 11 to connect the first front cavity and the second front cavity to the sound outlet hole 112, so that the first front cavity and the second front cavity converge to the side of the bracket 11 through the sound guide channel, and then converge to a sound outlet hole 112 to realize the side sound of the sound-emitting device, thereby achieving the effect of superimposing the performance of the first vibration component 31 and the second vibration component 32, that is, the vibration area of ​​the sound-emitting device is improved, and the sound quality of the sound-emitting device is enhanced.

[0061] A rear cavity is formed between the first vibration component 31, the second vibration component 32, the bracket 11 and the magnetic circuit unit 2, and is connected to the outside of the sound-generating device through the leakage channel 4 set between the magnetic circuit unit 2 and the bracket 11 through the leakage hole 111, so that the sound leakage structure of the sound-generating device is completed by the bracket 11 and the magnetic circuit unit 2 themselves, without adding additional parts to set the leakage channel 4, thereby reducing the radial and axial dimensions of the sound-generating device, making the structure of the sound-generating device simpler and more compact, and facilitating the miniaturization of the sound-generating device.

[0062] In addition, the structural design of the leakage channel 4 combined with the rear cavity and the leakage hole 111 ensures the low-frequency characteristics of the sound-generating device without increasing the volume of the sound-generating device, thereby enhancing the sound quality of the sound-generating device. The improvement of the sound quality of the sound-generating device can improve the sound quality, response speed, and wearing comfort of the sound-generating device, thereby ensuring the performance requirements of the sound-generating device.

[0063] In one embodiment, the sound-generating device can be applied to OWS (Open Wearable Stereo) headphones or TWS (True Wireless Stereo) headphones to improve the sound quality of OWS headphones or TWS headphones; the sound-generating device can adopt a DPS (Die Packaging Solution) structural monomer to ensure the sound requirements of the sound-generating device.

[0064] Optionally, refer to Figure 3 to Figure 4 The first vibration component 31, the bracket 11 and the magnetic circuit unit 2 form a first space, the second vibration component 32, the bracket 11 and the magnetic circuit unit 2 form a second space, and the rear cavity includes the first space and the second space; the first channel 41 and the second channel 42 are respectively provided between the two sides of the magnetic circuit unit 2 and the bracket 11, the leakage channel 4 includes the first channel 41 and the second channel 42, the first space is connected to the leakage hole 111 through the first channel 41, and the second space is connected to the leakage hole 111 through the second channel 42.

[0065] Specifically, in this embodiment, based on the structural design of the magnetic circuit unit 2 and the vibration unit 3, the sound-generating device has a double-sided vibration characteristic, so that the back cavity includes a first space surrounded by the first vibration component 31, the bracket 11 and the magnetic circuit unit 2, and a second space surrounded by the second vibration component 32, the bracket 11 and the magnetic circuit unit 2. In practical applications, the first space is usually connected to the second space to increase the volume of the entire back cavity and the smoothness of the airflow. Further, the sound waves of the first space and the second space can be transmitted to the outside of the sound-generating device through the first channel 41 formed between the upper side of the magnetic circuit unit 2 and the bracket 11 and the second channel 42 formed between the lower side and the bracket 11 through the leakage hole 111, respectively, so as to meet the sound leakage requirements of the first space and the second space without adding components. The first channel 41 and the second channel 42 are connected to each other to simplify the overall structure of the entire leakage channel 4.

[0066] Optionally, refer to Figure 3 The magnetic circuit unit 2 includes a yoke 21, a central magnetic portion 22 and a side magnetic portion 23. The yoke 21 has a middle accommodating area and an edge accommodating area. The central magnetic portion 22 is arranged in the middle accommodating area, and the side magnetic portion 23 is arranged in the edge accommodating area. The side magnetic portion 23 includes side magnets and side washers 231 which are stacked in sequence in the edge accommodating area. The part 211 of the yoke 21 corresponding to the edge accommodating area is provided with a first notch 2111 along its periphery, and the side washer 231 is provided with a second notch 2311 along its periphery. The first channel 41 includes the first notch 2111, and the second channel 42 includes the second notch.

[0067] Specifically, in this embodiment, the yoke 21 may include a middle zone, an edge zone 211 and a connecting zone, the middle zone is connected to the edge zone through the connecting zone and is staggered with the edge zone to form an intermediate accommodating zone between the middle zone and the connecting zone, and an edge accommodating zone is formed between the edge zone and the connecting zone.

[0068] Among them, the central magnetic part 22 is arranged in the middle accommodating area and forms a first magnetic gap between the connecting area, and the edge magnetic part 23 is arranged in the edge accommodating area and forms a second magnetic gap between the connecting area. The first magnetic gap and the second magnetic gap are respectively located on the upper and lower sides of the magnetic yoke 21, so that part of the structure of the first vibration component 31 vibrates up and down under the action of the magnetic field change in the first magnetic gap, and part of the second vibration component 32 vibrates up and down under the action of the magnetic field change in the second magnetic gap without affecting each other, thereby ensuring the vibration efficiency of the first vibration component 31 and the second vibration component 32.

[0069] A first notch 2111 is provided along the outer circumference of the portion of the yoke corresponding to the edge accommodating area to form a part of the first channel 41, thereby connecting the first space with the leakage hole 111; a second notch 2311 is provided along the outer circumference of the edge washer to form a part of the second channel 42 to connect the second space with the leakage hole 111, thereby connecting the entire rear cavity with the leakage hole 111, which does not affect the characteristics of the magnetic circuit unit 2, while satisfying the sealing performance of the rear cavity inside the sound-emitting device and the sound leakage requirements from the side of the bracket 11, thereby enhancing the low-frequency characteristics of the sound-emitting device.

[0070] Optionally, refer to Figure 3 and Figure 4 The first notch 2111 and the second notch 2311 extend along the periphery of the edge accommodating area and the periphery of the edge washer 231 respectively, and the extension length of the first notch 2111 accounts for 10% to 50% of the periphery of the edge accommodating area, and the extension length of the second notch 2311 accounts for 10% to 50% of the periphery of the edge washer.

[0071] Specifically, in this embodiment, the ratio of the extension length of the first notch 2111 and the second notch 2311 not only ensures the magnetic circuit characteristics of the magnetic circuit unit 2, but also meets the connection requirements of the first space and the second space with the leakage hole 111, thereby ensuring the sound quality of the sound-generating device. Among them, the ratio of the first notch 2111 and the ratio of the second notch 2311 can be the same or different, which is subject to the actual structural design.

[0072] Optionally, refer to Figures 1 to 3 , the first notch 2111 and the second notch 2311 are connected along the vibration direction of the vibration unit 3; and / or, the bracket 11 is provided with a third notch 113 connected to the first notch 2111, and a fourth notch 114 connected to the second notch 2311, the first channel 41 also includes the third notch 113, the second channel 42 also includes the fourth notch 114, and the third notch 113 is connected to the fourth notch 114 along the vibration direction of the vibration unit 3.

[0073] Specifically, in this embodiment, a third notch 113 communicating with the first notch 2111 and a fourth notch 114 communicating with the second notch 2311 may be further provided at positions on the bracket 11 corresponding to the first notch 2111 and the second notch 2311. The first notch 2111 and the third notch 113 form a first channel 41, and the second notch 2311 and the fourth notch 114 form a second channel 42, further improving the smoothness of the airflow in each part of the leakage channel 4.

[0074] In the above structure, the circumference range of the third notch 113 and the fourth notch 114 along the bracket 11 can be the same as or different from the circumference range of the first notch 2111 and the second notch 2311. Among them, at least a part of the third notch 113 is opposite to the first notch 2111, and at least a part of the fourth notch 114 is opposite to the second notch 2311, so that the first notch 2111 is connected to the third notch 113, and the second notch 2311 is connected to the fourth notch 114. In combination with the first notch 2111 and the second notch 2311 being connected to each other in the vibration direction of the vibration unit 3, the entire leakage channel 4 is connected to the leakage hole 111, thereby improving the compactness of the structure.

[0075] Optionally, refer to Figure 4 The sound-conducting channel includes a third channel 117 that passes through the top surface of the bracket and connects the first front cavity and the sound outlet hole 112, and a fourth channel 118 that passes through the bottom surface of the bracket 11 and connects the second front cavity and the sound outlet hole 112. The first front cavity, the third channel 117, the second front cavity and the fourth channel 118 are all isolated from the rear cavity.

[0076] Specifically, in this embodiment, the third channel 117 and the fourth channel 118 are used as sound-guiding channels to converge the first front cavity and the second front cavity to the sound outlet 112, so as to achieve the side sound effect of the sound-emitting device, and the effect of the superposition of the performance of the first vibration component 31 and the second vibration component 32, that is, the vibration area of ​​the sound-emitting device is improved, and the sound quality of the sound-emitting device is enhanced. Among them, the third channel 117, the fourth channel 118, the first front cavity and the second front cavity are separated from the rear cavity, and the third channel 117 and the fourth channel 118 respectively pass through the top and bottom surfaces of the bracket 11 and are connected to the sound outlet 112, so that the third channel 117 and the fourth channel 118 are set without adding parts, while improving the compactness of the sound-emitting device and optimizing the output frequency response curve of the sound-emitting device, so that the sound emitted by the sound-emitting device is more natural and real.

[0077] Furthermore, the sound quality of the sound-emitting device is improved, which can improve the sound quality, response speed and wearing comfort of the sound-emitting device, thereby ensuring the performance requirements of the sound-emitting device.

[0078] In one embodiment, the sound-generating device can be applied to OWS (Open Wearable Stereo) headphones or TWS (True Wireless Stereo) headphones to improve the sound quality of OWS headphones or TWS headphones; the sound-generating device can adopt a DPS (Die Packaging Solution) structural monomer to ensure the sound requirements of the sound-generating device.

[0079] Alternatively, if Figure 5 As shown, the bracket 11 includes a circular portion 119 and an extension portion 120 protruding from the circular portion 119, the first vibration component 31 and the second vibration component 32 are both connected to the circular portion 119, and the third channel 117 and the fourth channel 118 are both arranged at the extension portion 120. Specifically, the circular portion 119 can be used to arrange the first vibration component 31 and the second vibration component 32, and the extension portion is located in a local area around the circular portion 119.

[0080] Optionally, refer to Figure 3 and Figure 4 The cover unit 1 also includes an upper cover 12 and a lower cover 13, and the upper cover 12 and the lower cover 13 are respectively connected to the two sides of the bracket 11; the first front cavity is formed between the first vibration component 31 and the upper cover 12, and the second front cavity is formed between the second vibration component 32 and the lower cover 13; the upper cover 12 has a first outer protrusion 121 away from the bracket 11, and the lower cover 13 has a second outer protrusion 131 away from the bracket 11, at least a part of the first outer protrusion 121 corresponds to the third channel 117, and at least a part of the second outer protrusion 131 corresponds to the fourth channel 118.

[0081] Specifically, the area of ​​the upper cover 12 close to the bracket 11 bulges outward to form a first outer protrusion 121 on the upper cover away from the bracket 11, thereby increasing the transmission space between the first front cavity and the third channel 117, and ensuring the efficiency of sound waves in the first front cavity being transmitted to the third channel 117. The area of ​​the lower cover 13 close to the bracket 11 bulges outward to form a second outer protrusion 131 on the lower cover 13 away from the bracket 11, thereby increasing the transmission space between the second front cavity and the fourth channel 118, and ensuring the efficiency of sound waves in the second front cavity being transmitted to the fourth channel 118.

[0082] The upper cover 12 is connected to the upper side of the bracket 11 so that the upper cover 12 surrounds the first vibration component 31 and the third channel 117, ensuring the sealing of the sound waves in the first front cavity to the third channel 117; the lower cover 13 is connected to the lower side of the bracket 11 so that the lower cover 13 surrounds the second vibration component 32 and the fourth channel 118, ensuring the sealing of the sound waves in the second front cavity to the fourth channel 118, and avoiding sound leakage when the sound-emitting device emits sound.

[0083] Optionally, refer to Figure 3 and Figure 4, in the vibration direction of the vibration unit 3, the two sides of the magnetic circuit unit 2 have a first magnetic gap and a second magnetic gap respectively; the first vibration component 31 includes a first diaphragm 312 and a first voice coil 311 connected to the first diaphragm 312, the second vibration component 32 includes a second diaphragm 322 and a second voice coil 321 connected to the second diaphragm 322, at least a part of the first voice coil 311 is located in the first magnetic gap, and at least a part of the second voice coil 321 is located in the second magnetic gap.

[0084] Specifically, the first vibration component 31 and the second vibration component 32 can be Figure 3 The magnetic circuit unit 2 vibrates up and down in the vertical direction, and the upper and lower sides of the magnetic circuit unit 2 respectively form a first magnetic gap and a second magnetic gap, and the annular first magnetic gap is located inside the annular second magnetic gap.

[0085] The first diaphragm 312 in the first vibration component 31 is located on the upper side of the magnetic circuit unit 2, and the top side of the first voice coil 311 is connected to the first vibration. The bottom side of the first voice coil 311 is suspended and extends into the first magnetic gap, so that the first voice coil 311 vibrates up and down under the action of the magnetic field change in the first magnetic gap, thereby ensuring the vibration efficiency of the first vibration component 3131.

[0086] The second diaphragm 322 in the second vibration component 32 is located on the lower side of the magnetic circuit unit 2, the bottom side of the second voice coil 321 is connected to the second diaphragm 322, and the top side of the second voice coil 321 is suspended and extends into the second magnetic gap, so that the second voice coil 321 can vibrate up and down under the action of the magnetic field change in the second magnetic gap, thereby ensuring the vibration efficiency of the second vibration component 32.

[0087] Optionally, refer to Figures 1 to 4 The bracket 11 includes a first bracket 115 and a second bracket 116, the first bracket 115 and the second bracket 116 are relatively connected, the side of the first bracket 115 away from the second bracket 116 forms the top surface, and the side of the second bracket 116 away from the first bracket 115 forms the bottom surface, the sound outlet hole 112 and the leakage hole 111 are both arranged between the first bracket 115 and the second bracket 116; and / or, there are two leakage holes 111, and two leakage channels 4 are arranged between the magnetic circuit unit 2 and the bracket 11 to respectively connect the two leakage holes 111 and the back cavity.

[0088] Specifically, in this embodiment, the bracket 11 is designed as a split structure in which the first bracket 115 and the second bracket 116 are connected, so as to facilitate the assembly of the magnetic circuit unit 2 and the vibration unit 3, and the split bracket 11 structure is convenient for setting the leakage hole 111 or the sound outlet hole 112 on its side, reducing the difficulty of processing. The leakage hole 111 is set between the first bracket 115 and the second bracket 116, which is also convenient for the rear cavity to be connected to the leakage hole 111 through the leakage channel 4, or for the first front cavity and the second front cavity to be connected to the sound outlet hole 112 through the sound guide channel respectively.

[0089] In a specific embodiment, two leakage holes 111 connected to the side surface of the bracket 11 are formed on the side surface of the bracket 11. The two leakage holes 111 are respectively located on opposite sides of the bracket 11, and the sound outlet hole 112 is equidistant from the two leakage holes 111, so that the sound outlet hole 112 is set away from the leakage hole to avoid the sound waves of the leakage hole 111 affecting the sound of the sound outlet hole 112.

[0090] Optionally, refer to Figure 4 When the sound-emitting device emits sound, the first vibration component 31 and the second vibration component 32 radiate the first sound wave of the same phase to the outside through the sound outlet hole 112, and the first vibration component 31 and the second vibration component 32 radiate the second sound wave of the opposite phase to the first sound wave to the outside through the leakage hole 111.

[0091] Specifically, the vibration frequency and amplitude of the first vibration component 31 and the second vibration component 32 can be the same, so that the first vibration component 31 and the second vibration component 32 radiate the first sound wave of the same phase to the outside of the sound-emitting device through the sound outlet hole 112; at least one leakage hole 111 connected to its side surface can be formed on the side of the bracket 11, and the leakage channel 4 connected from the rear cavity to the leakage hole 111 is separated from the third channel 117 and the fourth channel 118 connected from the two front cavities to the sound outlet hole 112, so as to balance the air pressure in the rear cavity and avoid distortion when the sound-emitting device emits sound.

[0092] In a specific embodiment, two leakage holes 111 connected to the side surface of the bracket 11 are formed on the side surface of the bracket 11, and the two leakage holes 111 are respectively located on opposite sides of the bracket 11, and the sound outlet hole 112 is equidistant from the two leakage holes 111, so as to set the sound outlet hole 112 away from the leakage hole 111 to avoid the sound waves of the leakage hole 111 affecting the sound of the sound outlet hole 112.

[0093] According to the second aspect of the present application, referring to Figures 6 to 8 , provides an acoustic device, comprising the sound-generating device described in the first aspect.

[0094] Specifically, the acoustic device can be a wearable acoustic device, such as an earphone, a bracelet, a watch, a VR device, an AR device or an MR device, or the acoustic device can be other electronic devices, such as a mobile phone, a tablet computer, an e-book reader, an audio player, a video player, a computer, a set-top box, a smart TV and a wearable device.

[0095] In the sound-generating device of the acoustic equipment, a leakage hole 111 connected to the outside is arranged on the side of the bracket 11, so that the airflow in the rear cavity is discharged from the side of the bracket 11 through the leakage channel 4, thereby enhancing the sound quality of the acoustic equipment without increasing the volume of the sound-generating device.

[0096] Optionally, refer to Figure 7 The acoustic device also includes a shell 100, and the sound-emitting device is connected to the shell 100 through the bracket 11; the shell 100 is provided with an external hole 101, and the external hole 101 is opposite to and connected with the sound outlet hole 111; the shell 100 is also provided with an external leakage hole 102, and an external rear cavity is provided between the shell 100 and the cover unit 1, and the rear cavity is connected to the external rear cavity through the leakage hole 111, and the external rear cavity is connected to the outside of the acoustic device through the external leakage hole 102.

[0097] Specifically, when the sound-emitting device is connected to the shell 100, there may be an assembly space between the sound-emitting device and the shell 100, and the assembly space may be connected to the rear cavity through the leakage hole 111 to form an external rear cavity, so as to increase the overall volume of the rear cavity in the acoustic device. The external rear cavity is connected to the outside of the acoustic device through the external leakage hole 102, thereby improving the low-frequency sound performance of the acoustic device.

[0098] The external sound hole 101 is relatively connected to the sound outlet hole 112, and the area between the external sound hole 101 and the sound outlet hole 112 is sealed. When the first front cavity and the second front cavity emit sound through the sound outlet hole 112 on the side of the bracket 11, the sound waves can be emitted to the outside of the acoustic device through the external sound hole 101, thereby ensuring the sound effect of the acoustic device.

[0099] In a specific embodiment, referring to Figure 6 The shell 100 is square, and the six faces of the shell 100 are respectively the front wall, the rear wall, the left wall, the right wall, the upper wall and the lower wall. The shell 100 is provided with an external hole 101 and two external leakage holes 102. The external hole 101 is located in the middle area of ​​the front wall, one external leakage hole 102 is located at the connection between the rear wall and the upper wall, and the other external leakage hole 102 is located at the connection between the rear wall and the lower wall, so as to balance the low-frequency performance of the acoustic device while ensuring the sound effect of the acoustic device.

[0100] 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: A cover unit, wherein the cover unit has a storage space therein, and the cover unit includes a bracket, wherein the bracket has a top surface, a bottom surface, and a side surface located therebetween, and the side surface of the bracket is provided with a sound outlet hole communicating with the outside of the sound-generating device; A magnetic circuit unit, which is disposed in the accommodation space and connected to the bracket; A vibration unit, the vibration unit is arranged in the accommodation space, the vibration unit includes a first vibration component and a second vibration component, in the vibration direction of the vibration unit, the first vibration component and the second vibration component are respectively connected to the two sides of the bracket, and cooperate with the magnetic circuit unit on the two sides of the magnetic circuit unit, the first vibration component forms a first front cavity on the side away from the second vibration component, the second vibration component forms a second front cavity on the side away from the first vibration component, and the first vibration component, the second vibration component and the bracket surround a rear cavity; Among them, in the vibration direction perpendicular to the vibration unit, the sound outlet hole at least partially corresponds to the magnetic circuit unit, the bracket is provided with a sound guide channel connecting the first front cavity, the second front cavity and the sound outlet hole, the side of the bracket is also provided with a leakage hole connected to the outside of the sound-emitting device, and a leakage channel connecting the rear cavity and the leakage hole is provided between the magnetic circuit unit and the bracket.

2. The sound generating device according to claim 1, characterized in that: The first vibration component, the bracket and the magnetic circuit unit enclose a first space, the second vibration component, the bracket and the magnetic circuit unit enclose a second space, and the rear cavity includes the first space and the second space; A first channel and a second channel are respectively provided between the two sides of the magnetic circuit unit and the bracket, the leakage channel includes the first channel and the second channel, the first space is connected to the leakage hole through the first channel, and the second space is connected to the leakage hole through the second channel.

3. The sound generating device according to claim 2, characterized in that: The magnetic circuit unit comprises a yoke, a central magnetic part and a side magnetic part, the yoke has a middle accommodating area and a side accommodating area, the central magnetic part is arranged in the middle accommodating area, the side magnetic part is arranged in the side accommodating area, and the side magnetic part comprises a side magnet and a side washer which are arranged and stacked in sequence in the side accommodating area; The portion of the yoke corresponding to the edge accommodating area is provided with a first notch along its periphery, the edge washer is provided with a second notch along its periphery, the first channel includes the first notch, and the second channel includes the second notch.

4. The sound generating device according to claim 3, characterized in that: The first notch and the second notch extend along the periphery of the edge accommodating area and the periphery of the edge washer respectively, the extension length of the first notch accounts for 10% to 50% of the periphery of the edge accommodating area, and the extension length of the second notch accounts for 10% to 50% of the periphery of the edge washer.

5. The sound generating device according to claim 3, characterized in that: The first notch and the second notch are connected along the vibration direction of the vibration unit; And / or, the bracket is provided with a third notch connected to the first notch, and a fourth notch connected to the second notch, the first channel also includes the third notch, the second channel also includes the fourth notch, and the third notch is connected to the fourth notch along the vibration direction of the vibration unit.

6. The sound generating device according to claim 1, characterized in that: The sound-guiding channel includes a third channel that passes through the top surface of the bracket and connects the first front cavity and the sound outlet hole, and a fourth channel that passes through the bottom surface of the bracket and connects the second front cavity and the sound outlet hole. The first front cavity, the third channel, the second front cavity and the fourth channel are all isolated from the rear cavity.

7. The sound generating device according to claim 6, characterized in that: The bracket includes a circular portion and an extension portion protruding from the circular portion, the first vibration component and the second vibration component are both connected to the circular portion, and the third channel and the fourth channel are both arranged in the extension portion.

8. The sound generating device according to claim 6, characterized in that: The cover unit further comprises an upper cover and a lower cover, wherein the upper cover and the lower cover are respectively connected to two sides of the bracket; The first front cavity is formed between the first vibration component and the upper cover, and the second front cavity is formed between the second vibration component and the lower cover; The upper cover has a first protrusion away from the bracket, and the lower cover has a second protrusion away from the bracket. At least part of the first protrusion corresponds to the third channel, and at least part of the second protrusion corresponds to the fourth channel.

9. The sound generating device according to claim 1, characterized in that: In the vibration direction of the vibration unit, two sides of the magnetic circuit unit are respectively provided with a first magnetic gap and a second magnetic gap; The first vibration component includes a first diaphragm and a first voice coil connected to the first diaphragm, the second vibration component includes a second diaphragm and a second voice coil connected to the second diaphragm, at least a portion of the first voice coil is located in the first magnetic gap, and at least a portion of the second voice coil is located in the second magnetic gap.

10. The sound generating device according to claim 1, characterized in that: The bracket comprises a first bracket and a second bracket, the first bracket and the second bracket are connected relative to each other, a side of the first bracket away from the second bracket forms the top surface, a side of the second bracket away from the first bracket forms the bottom surface, and the sound outlet and the leakage hole are both arranged between the first bracket and the second bracket; And / or, two leakage holes are provided, and two leakage channels respectively connecting the two leakage holes and the rear cavity are provided between the magnetic circuit unit and the bracket.

11. The sound generating device according to any one of claims 1 to 10, characterized in that: When the sound-emitting device emits sound, the first vibration component and the second vibration component radiate first sound waves of the same phase to the outside through the sound outlet hole, and the first vibration component and the second vibration component radiate second sound waves of opposite phase to the first sound wave to the outside through the leakage hole.

12. An acoustic device, characterized in that: A sound-generating device comprising any one of claims 1-11.

13. The acoustic device according to claim 12, characterized in that It also includes a housing, wherein the sound-generating device is connected to the housing through the bracket; The housing is provided with an external sound hole, the external sound hole is opposite to and connected with the sound outlet hole; The shell is also provided with an external leakage hole, and an external rear cavity is provided between the shell and the cover unit. The rear cavity is connected to the external rear cavity through the leakage hole, and the external rear cavity is connected to the outside of the acoustic device through the external leakage hole.

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