Sound production device and acoustic equipment

Abstract

The utility model provides a sound production device and acoustic equipment, the sound production device comprises a cover body unit, a magnetic circuit unit and a vibration unit, the vibration unit comprises a first vibration assembly and a second vibration assembly, and a first front cavity is formed in the side, away from the second vibration assembly, of the first vibration assembly; a second front cavity is formed in the side, deviating from the first vibration assembly, of the second vibration assembly. The support is provided with a sound guiding channel which communicates the first front cavity and the second front cavity to the sound outlet hole, so that the first front cavity and the second front cavity are converged to the side face of the support through the first channel and the second channel, and the sound guiding channel is arranged in the direction perpendicular to the vibration direction of the vibration unit. And at least part of the sound outlet hole is opposite to the magnetic circuit unit, so that the sound production quality and the sound production efficiency of the sound production device are enhanced.

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. Utility Model Content

[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 receiving space therein, and the cover unit comprises a bracket, and a sound outlet hole is arranged on a side surface of the bracket;

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

[0007] A vibration unit, wherein the vibration unit is arranged in the accommodating space, and in the vibration direction of the vibration unit, the two sides of the magnetic circuit unit have a first magnetic gap and a second magnetic gap respectively, the vibration unit comprises a first vibration component and a second vibration component, the first vibration component and the second vibration component are connected to opposite sides of the bracket, the first vibration component comprises a first diaphragm and a first voice coil connected to the first diaphragm, the second vibration component comprises a second diaphragm and a second voice coil connected to the second diaphragm, at least part of the first voice coil is located in the first magnetic gap, at least part of the second voice coil is located in the second magnetic gap, the first vibration component forms a first front cavity on the side away from the second vibration component, and the second vibration component forms a second front cavity on the side away from the first vibration component, the first vibration component, the second vibration component and the bracket form a rear cavity, and the bracket is provided with a sound guide channel connecting the first front cavity and the second front cavity to the sound outlet hole, and the sound guide channel is isolated from the rear cavity;

[0008] In a vibration direction perpendicular to the vibration unit, at least a portion of the sound outlet hole is opposite to the magnetic circuit unit.

[0009] Optionally, the bracket has a top surface and a bottom surface, and the top surface and the bottom surface are located on opposite sides of the side surface;

[0010] The sound guide channel includes a first channel that passes through the top surface and connects the first front cavity and the sound outlet hole, and a second channel that passes through the bottom surface and connects the second front cavity and the sound outlet hole.

[0011] Optionally, the first front cavity and the first channel form a first space, the second front cavity and the second channel form a second space, and both the first space and the second space are isolated from the rear cavity.

[0012] Optionally, the first channel and the second channel are connected along a vibration direction of the vibration unit.

[0013] Optionally, the first channel includes a first port located on the top surface, the second channel includes a second port located on the bottom surface, the first port is located on the outer peripheral side of the first vibration component, and the second port is located on the outer peripheral side of the second vibration component.

[0014] 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 first port, the second port, the first channel and the second channel are all arranged on the extension portion.

[0015] Optionally, the cover unit further comprises an upper cover and a lower cover, the upper cover is connected to the top surface of the bracket, and the lower cover is connected to the bottom surface of the bracket;

[0016] 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.

[0017] Optionally, the upper cover has a first outer protrusion facing away from the bracket, and the lower cover has a second outer protrusion facing away from the bracket, at least a portion of the first outer protrusion corresponds to the first channel, and at least a portion of the second outer protrusion corresponds to the second channel.

[0018] 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, and a side of the second bracket away from the first bracket forms the bottom surface;

[0019] The sound outlet is arranged between the first bracket and the second bracket.

[0020] Optionally, the magnetic circuit unit comprises a yoke, a central magnetic portion and a side magnetic portion, the yoke has a middle accommodating area and a peripheral accommodating area, the central magnetic portion is arranged in the middle accommodating area, and the side magnetic portion is arranged in the peripheral accommodating area;

[0021] The edge magnet portion includes an edge washer, an edge of the yoke is assembled to the first bracket, and an edge of the edge washer is assembled to the second bracket.

[0022] Optionally, the bracket is provided with a leakage hole communicating with the rear cavity;

[0023] 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 of the sound-emitting device 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 of the sound-emitting device through the leakage hole.

[0024] According to a second aspect of the embodiments of the present application, an acoustic device is provided, and the acoustic device includes the sound-generating device described in the first aspect.

[0025] Optionally, the acoustic device comprises a housing, and the sound-generating device is connected to the housing via the bracket;

[0026] The shell is provided with an external sound hole, and the external sound hole is opposite to and communicated with the sound outlet hole.

[0027] Optionally, the housing is provided with an external leakage hole, an external rear cavity is provided between the housing and the cover unit, and the bracket is provided with a leakage hole;

[0028] Wherein, the rear cavity is connected to the outer rear cavity through the leakage hole, and the outer rear cavity is connected to the outside of the acoustic device through the external leakage hole.

[0029] A technical effect of this application is:

[0030] An embodiment of the present application provides a sound-emitting 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, a first front cavity is provided between the side of the first vibration component facing away from the second vibration component and the cover unit, and a second front cavity is provided between the side of the second vibration component facing away from the first vibration component and the cover unit; wherein a sound guiding channel connecting the first front cavity and the second front cavity to the sound outlet hole is provided on the bracket, and the sound guiding channel is isolated from the rear cavity, so that the first front cavity and the second front cavity converge to the side of the bracket through the first channel and the second channel, and in the vibration direction perpendicular to the vibration unit, at least a part of the sound outlet hole is opposite to the magnetic circuit unit, thereby enhancing the sound quality and sound efficiency of the sound-emitting device.

[0031] 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

[0032] 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.

[0033] Figure 1 A cross-sectional view of a sound-generating device provided in one embodiment of the present application;

[0034] Figure 2 A stereoscopic sound device provided by an embodiment of the present application Figure 1 ;

[0035] Figure 3 A stereoscopic sound device provided by an embodiment of the present application Figure 2 ;

[0036] Figure 4 A stereoscopic sound device provided by an embodiment of the present application Figure 3 ;

[0037] Figure 5 A stereoscopic sound device provided by an embodiment of the present application Figure 4 ;

[0038] Figure 6 A three-dimensional diagram of a sound-generating device provided in one embodiment of the present application (excluding the upper cover and the lower cover);

[0039] Figure 7 A cross-sectional view of an acoustic device provided for one embodiment of the present application;

[0040] Figure 8 An exploded diagram of an acoustic device provided in accordance with an embodiment of the present application;

[0041] Fig. 9 A stereoscopic acoustic device provided by an embodiment of the present application Figure 1 ;

[0042] Fig.10 A stereoscopic acoustic device provided by an embodiment of the present application Figure 2 .

[0043] in:

[0044] 1. Cover unit; 11. Bracket; 111. Sound outlet; 112. First channel; 1121. First port; 113. Second channel; 1131. Second port; 114. Circular portion; 115. Extending portion; 116. First bracket; 117. Second bracket; 118. Leakage hole; 12. Upper cover; 121. First convex portion; 13. Lower cover; 131. Second convex portion;

[0045] 2. Magnetic circuit unit; 21. Magnetic yoke; 22. Center magnetic part; 23. Side magnetic part; 231. Side washer;

[0046] 3. Vibration unit; 31. First vibration component; 311. First diaphragm; 312. First voice coil; 32. Second vibration component; 321. Second diaphragm; 322. Second voice coil;

[0047] 100. housing; 101. external discharge hole; 102. external leakage hole. DETAILED DESCRIPTION

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] The sound-emitting device provided in the embodiment of the present application is provided with vibration components on both sides of the magnetic circuit unit on the bracket, and the vibration area is increased by using the two vibration components; and two sound-guiding channels connected to the sound outlet holes are provided in the bracket, so as to merge the sound of the two front cavities to the sound outlet holes on the sides of the bracket to emit sound, thereby improving the sound efficiency and sound quality of the sound-emitting device.

[0055] Reference Figure 1 , an embodiment of the present application provides a sound-generating device, the sound-generating device comprising:

[0056] A cover unit 1, wherein the cover unit 1 has a receiving space, and the cover unit 1 comprises a bracket 11, and a sound outlet hole 111 is arranged on a side surface of the bracket 11;

[0057] A magnetic circuit unit 2, which is disposed in the accommodation space and connected to the bracket 11;

[0058] The vibration unit 3 is arranged in the accommodating space. 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 vibration unit 3 includes a first vibration component 31 and a second vibration component 32. The first vibration component 31 and the second vibration component 32 are connected to the opposite sides of the bracket 11. The first vibration component 31 includes a first diaphragm 311 and a first voice coil 312 connected to the first diaphragm 311. The second vibration component 32 includes a second diaphragm 321 and a second voice coil 322 connected to the second diaphragm 321. At least a portion of the first voice coil 312 is located in the first magnetic gap, and at least a portion of the second voice coil 322 is located in the first magnetic gap. The first vibration component 31 is located in the second magnetic gap, and the side of the first vibration component 31 away from the second vibration component 32 forms a first front cavity, and the side of the second vibration component 32 away from the first vibration component 31 forms a second front cavity. For example, there is a first front cavity between the side of the first vibration component 31 away from the second vibration component 32 and the cover unit 1, and there is a second front cavity between the side of the second vibration component 32 away from the first vibration component 31 and the cover unit 1; the first vibration component 31, the second vibration component 32 and the bracket 11 form a rear cavity, and the bracket 11 is provided with a sound guide channel connecting the first front cavity and the second front cavity to the sound outlet hole 111, and the sound guide channel is isolated from the rear cavity;

[0059] See also Figure 1 , in a vibration direction perpendicular to the vibration unit 3 , at least a portion of the sound outlet hole 111 is opposite to the magnetic circuit unit 2 .

[0060] Specifically, the first vibration component 31 and the second vibration component 32 can be Figure 1 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.

[0061] The first diaphragm 311 in the first vibration component 31 is located on the upper side of the magnetic circuit unit 2, the top side of the first voice coil 312 is connected to the first diaphragm 311, and the bottom side of the first voice coil 312 is suspended and extends into the first magnetic gap, so that the first voice coil 312 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 31.

[0062] The second diaphragm 321 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 322 is connected to the second diaphragm 321, and the top side of the second voice coil 322 is suspended and extends into the second magnetic gap, so that the second voice coil 322 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.

[0063] Specifically, 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 to generate acoustic wave vibrations in the first front cavity and the second front cavity.

[0064] At least part of the sound outlet hole 111 is opposite to the magnetic circuit unit 2 in a direction perpendicular to the vibration direction of the vibration unit 3, for example Figure 1 At least a portion of the middle sound hole 111 is laterally opposite to the magnetic circuit unit 2, so the sound hole 111 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 111 and converge at the sound hole 111 to produce sound, thereby improving the sound efficiency and sound intensity of the sound-emitting device.

[0065] 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.

[0066] 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 first channel 112 and a second channel 113 are provided on the bracket 11, the first channel 112 connects the first front cavity to the sound outlet hole 111, and the second channel 113 connects the second front cavity to the sound outlet hole 111, so that the first front cavity and the second front cavity converge to the side of the bracket 11 through the sound guide channel formed by the first channel 112 and the second channel 113, and then converge to a sound outlet hole 111 to realize the side sound emission of the sound-emitting device, so as to achieve the effect of 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.

[0067] 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.

[0068] 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.

[0069] The sound-emitting device provided in the embodiment of the present application includes a cover unit 1, a magnetic circuit unit 2 and a vibration unit 3, the vibration unit 3 includes a first vibration component 31 and a second vibration component 32, the first vibration component 31 and the second vibration component 32 are connected to opposite sides of the bracket 11, the first vibration component 31 and the second vibration component 32 cooperate with the magnetic circuit unit 2 on both sides of the magnetic circuit unit 2, the first vibration component 31 forms a first front cavity on the side away from the second vibration component 32, and the second vibration component 32 forms a second front cavity on the side away from the first vibration component 31; wherein, a sound guide channel connecting the first front cavity and the second front cavity to the sound outlet is provided on the bracket 11, and the sound guide channel is isolated from the back cavity, so that the first front cavity and the second front cavity converge to the side of the bracket 11 through the sound guide channel formed by the first channel 112 and the second channel 113, and in the vibration direction perpendicular to the vibration unit, at least part of the sound outlet is opposite to the magnetic circuit unit, thereby enhancing the sound quality and sound efficiency of the sound-emitting device.

[0070] In one embodiment, the bracket 11 has a top surface, a bottom surface and a side surface, and the top surface and the bottom surface are located on opposite sides of the side surface;

[0071] The sound guide channel includes a first channel 112 that passes through the top surface and connects the first front cavity and the sound outlet hole 111 , and a second channel 113 that passes through the bottom surface and connects the second front cavity and the sound outlet hole 111 .

[0072] 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 on the side facing the upper cover of the cover unit 1, and the bracket 11 forms a bottom surface on the side facing the lower cover 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 outlet hole 111 is arranged on the side surface of the bracket 11 to facilitate the side sound of the sound-emitting device and improve the sound efficiency of the sound-emitting device.

[0073] In some embodiments, see Figure 1 The first front cavity and the first channel 112 form a first space, the second front cavity and the second channel 113 form a second space, and both the first space and the second space are isolated from the rear cavity.

[0074] Specifically, since the first vibration component 31 and the second vibration component 32 are arranged on opposite sides of the bracket 11, the space inside the bracket 11 is surrounded by the first vibration component 31 and the second vibration component 32 to form a rear cavity inside the sound-generating device; the rear cavity is isolated from the space where the two front cavities are located, which can optimize the output frequency response curve of the sound-generating device and make the sound emitted by the sound-generating device more natural and realistic.

[0075] In the sound-emitting device provided in the embodiment of the present application, the first channel 112 and the second channel 113 can be connected to the sound outlet hole 111 after merging in the bracket 11, or the first channel 112 and the second channel 113 can be extended separately in the bracket 11 and then connected to the sound outlet hole 111, that is, the first channel 112 and the second channel 113 are independent of each other.

[0076] In some embodiments, see Figure 1 The first channel 112 and the second channel 113 merge into a channel outlet in the bracket 11, and the channel outlet is connected to the sound outlet 111 through a connecting channel, so that the vibration sound waves in the first front cavity and the second front cavity are merged in the bracket 11, thereby ensuring the consistency of the sound wave vibration transmitted to the sound outlet 111.

[0077] In another embodiment, the first channel 112 and the second channel 113 are independently arranged in the bracket 11, one end of the first channel 112 is located on the top surface, and the other end of the first channel 112 is connected to the sound outlet hole 111, and one end of the second channel 113 is located on the bottom surface, and the other end of the second channel 113 is connected to the sound outlet hole 111 and isolated from the other end of the first channel 112, which can avoid the mutual weakening of vibration sound waves in the first front cavity and the second front cavity, thereby increasing the sound intensity of the sound-emitting device.

[0078] In some embodiments, see Figure 1 The first channel 112 and the second channel 113 are connected along the vibration direction of the vibration unit 3. Specifically, the first vibration component 31 and the second vibration component 32 can be connected in the following manner: Figure 1 The first channel 112 and the second channel 113 are connected to each other after extending vertically in the bracket 11 to form a vertical sound guide channel. The vibration sound waves in the first front cavity and the second front cavity converge at the middle position of the sound guide channel and are further transmitted to the sound outlet 111 to emit sound to the outside, thereby ensuring the sound clarity and sound intensity of the sound-emitting device.

[0079] In some embodiments, see Figure 1 and Figure 6 The first channel 112 includes a first port 1121 located on the top surface, and the second channel 113 includes a second port 1131 located on the bottom surface. The first port 1121 is located on the outer peripheral side of the first vibration component 31 , and the second port 1131 is located on the outer peripheral side of the second vibration component 32 .

[0080] Specifically, when the first vibration component 31 is connected to the top surface of the bracket 11, the top surface of the bracket 11 also has a first area on the outer peripheral side of the first vibration component 31, and the first area can be used to set the first port 1121 of the first channel 112, so that the first port 1121 and the first vibration component 31 are adjacent to each other, so that the sound waves generated by the vibration of the first vibration component 31 can be transmitted to the first channel 112 through the first port 1121, thereby shortening the path of sound wave transmission.

[0081] When the second vibration component 32 is connected to the bottom surface, a second area is also provided on the bottom surface of the bracket 11 at the outer peripheral side of the second vibration component 32, and the second area can be used to set the second port 1131 of the second channel 113, so that the second port 1131 and the second vibration component 32 are arranged adjacent to each other, so that the sound waves generated by the vibration of the second vibration component 32 can be transmitted to the second channel 113 through the second port 1131, thereby shortening the path of sound wave transmission and improving the sound efficiency of the sound-emitting device.

[0082] In some embodiments, see Figure 6 The bracket 11 includes a circular portion 114 and an extension portion 115 protruding from the circular portion 114 , the first vibration component 31 and the second vibration component 32 are both connected to the circular portion 114 , and the first port 1121 , the second port 1131 , the first channel 112 and the second channel 113 are all disposed on the extension portion 115 .

[0083] Specifically, the circular portion 114 can be used to set the first vibration component 31 and the second vibration component 32 , and the extension portion 115 is located in a local area around the circular portion 114 .

[0084] In some embodiments, see Figures 1 to 3 The cover unit 1 further includes an upper cover 12 and a lower cover 13, the upper cover 12 is connected to the top surface of the bracket 11, and the lower cover 13 is connected to the bottom surface of the bracket 11;

[0085] See also Figure 1 A first front cavity is formed between the first vibration component 31 and the upper cover 12 , and a second front cavity is formed between the second vibration component 32 and the lower cover 13 .

[0086] Specifically, the upper cover 12 is connected to the outer side of the first channel 112 on the top surface of the bracket 11, so that the upper cover 12 surrounds the first port 1121 and the first vibration component 31, thereby ensuring the sealing of the sound waves in the first front cavity to the first channel 112; the lower cover 13 is connected to the outer side of the first channel 112 on the bottom surface of the bracket 11, so that the lower cover 13 surrounds the second port 1131 and the second vibration component 32, thereby ensuring the sealing of the sound waves in the second front cavity to the second channel 113, thereby avoiding sound leakage when the sound-emitting device emits sound.

[0087] In some embodiments, see Figure 1 , Figure 4 and Figure 5 The upper cover 12 has a first outer protrusion 121 facing away from the bracket 11, and the lower cover 13 has a second outer protrusion 131 facing away from the bracket 11. At least part of the first outer protrusion 121 corresponds to the first channel 112, and at least part of the second outer protrusion 131 corresponds to the second channel 113.

[0088] Specifically, the area on the upper cover 12 close to the bracket 11 protrudes outward to form a first outer protrusion 121 on the upper cover 12 away from the bracket 11, thereby increasing the transmission space between the first front cavity and the first channel 112 and ensuring the efficiency of sound wave transmission from the first front cavity to the first channel 112.

[0089] The area on 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 second channel 113 and ensuring the efficiency of sound wave transmission from the second front cavity to the second channel 113.

[0090] In some embodiments, see Figure 1 The bracket 11 includes a first bracket 116 and a second bracket 117, the first bracket 116 and the second bracket 117 are connected relative to each other, a side of the first bracket 116 away from the second bracket 117 forms a top surface, and a side of the second bracket 117 away from the first bracket 116 forms a bottom surface;

[0091] The sound outlet 11 is disposed between the first bracket 116 and the second bracket 117 .

[0092] Specifically, a first notch is formed on a side of the first bracket 116 close to the second bracket 117, and the first notch extends to the side surface of the first bracket 116. A second notch is formed on a side of the second bracket 117 close to the first bracket 116, and the second notch extends to the side surface of the second bracket 117. The side surface of the first bracket 116 and the side surface of the second bracket 117 together form the side surface of the bracket 11, that is, the first notch and the second notch both extend to the side surface of the bracket 11.

[0093] In this embodiment, the first notch and the second notch are opposite to each other up and down, thereby enclosing and forming the sound outlet 111 , so that the sound waves vibrating in the front cavity outside the first bracket 116 and the second bracket 117 are transmitted to the sound outlet 111 .

[0094] In some embodiments, see Figure 1 The magnetic circuit unit 2 includes a yoke 21, a central magnetic portion 22 and a peripheral magnetic portion 23. The yoke 21 has a middle accommodating area and a peripheral accommodating area. The central magnetic portion 22 is arranged in the middle accommodating area, and the side magnetic portion 23 is arranged in the peripheral accommodating area.

[0095] The edge magnet portion 23 includes an edge washer 231 . The edge of the yoke 21 is assembled to the first bracket 116 , and the edge of the edge washer 231 is assembled to the second bracket 117 .

[0096] Specifically, the yoke 21 may include a middle area, an edge area and a connecting area, wherein the middle area is connected to the edge area through the connecting area and is staggered with the edge area to form an intermediate accommodating area between the middle area and the connecting area, and a peripheral accommodating area is formed between the edge area and the connecting area.

[0097] The central magnetic portion 22 is arranged in the middle accommodating area and forms a first magnetic gap with the connecting area, and the edge magnetic portion 23 is arranged in the peripheral accommodating area and forms a second magnetic gap with the connecting area. The first magnetic gap and the second magnetic gap are respectively located on the upper and lower sides of the yoke 21, so that the first voice coil 312 vibrates up and down under the action of the magnetic field change in the first magnetic gap, and the second voice coil 322 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.

[0098] In some embodiments, see Figures 1 to 5 , the bracket 11 is provided with a leakage hole 118 communicating with the rear cavity;

[0099] 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 of the sound-emitting device through the sound outlet hole 111, 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 of the sound-emitting device through the leakage hole 118.

[0100] 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 111; the side of the bracket 11 can form at least one leakage hole 118 connected to its side surface, and the channel connecting the rear cavity to the leakage hole 118 and the channels connecting the two front cavities to the sound outlet holes 111 are isolated from each other, so as to balance the air pressure in the rear cavity and avoid distortion when the sound-emitting device emits sound.

[0101] In a specific embodiment, two leakage holes 118 connected to the side surface of the bracket 11 are formed on the side surface of the bracket 11. The two leakage holes 118 are respectively located on opposite sides of the bracket 11, and the distances between the sound outlet hole 111 and the two leakage holes 118 are equal, so that the sound outlet hole 111 is set away from the leakage hole 118 to avoid the sound waves of the leakage hole 118 from affecting the sound of the sound outlet hole 111.

[0102] See also Figures 7 to 10 , an embodiment of the present application provides an acoustic device, which includes the above-mentioned sound-generating device.

[0103] 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.

[0104] In the sound-emitting device of the acoustic device, a first channel 112 penetrating from the top surface to the side surface and a second channel 113 penetrating from the bottom surface to the side surface are provided on the bracket 11, and the first channel 112 connects the first front cavity to the sound outlet hole 111, and the second channel 113 connects the second front cavity to the sound outlet hole 111, so that the first front cavity and the second front cavity converge to the side of the bracket 11 through the sound-guiding channel formed by the first channel 112 and the second channel 113, thereby enhancing the sound quality of the acoustic device.

[0105] In some embodiments, see Figure 7 and Fig. 9 , the acoustic device comprises a housing 100, and a sound generating device is connected to the housing 100 via a bracket 11;

[0106] The housing 100 is provided with an external sound hole 101 , which is opposite to and connected with the sound outlet hole 111 .

[0107] Specifically, the external hole 101 is relatively connected to the sound outlet hole 111, and the area between the external hole 101 and the sound outlet hole 111 is sealed. When the sound guiding channel formed by the first channel 112 and the second channel 113 of the first front cavity converges to the sound outlet hole 111 on the side of the bracket 11, the sound waves in the sound guiding channel can be emitted to the outside of the acoustic device through the external hole 101, thereby ensuring the sound effect of the acoustic device.

[0108] In some embodiments, see Figure 7 , Fig. 9 and Fig.10 , an external leakage hole 102 is provided on the housing 100, an external rear cavity is provided between the housing 100 and the cover unit 1, and a leakage hole 118 is provided on the bracket 11;

[0109] The rear cavity is connected to the outer rear cavity through the leakage hole 118 , and the outer rear cavity is connected to the outside of the acoustic device through the outer leakage hole 102 .

[0110] 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 118 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.

[0111] In a specific embodiment, the shell 100 is square, and the six faces of the shell 100 are respectively a front wall, a rear wall, a left wall, a right wall, an upper wall and a 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.

[0112] 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 receiving space therein, and the cover unit comprises a bracket, and a sound outlet hole is arranged on a side surface of the bracket; A magnetic circuit unit, which is disposed in the accommodation space and connected to the bracket; A vibration unit, wherein the vibration unit is arranged in the accommodating space, and in the vibration direction of the vibration unit, the two sides of the magnetic circuit unit have a first magnetic gap and a second magnetic gap respectively, the vibration unit comprises a first vibration component and a second vibration component, the first vibration component and the second vibration component are connected to opposite sides of the bracket, the first vibration component comprises a first diaphragm and a first voice coil connected to the first diaphragm, the second vibration component comprises a second diaphragm and a second voice coil connected to the second diaphragm, at least part of the first voice coil is located in the first magnetic gap, at least part of the second voice coil is located in the second magnetic gap, the first vibration component forms a first front cavity on the side away from the second vibration component, and the second vibration component forms a second front cavity on the side away from the first vibration component, the first vibration component, the second vibration component and the bracket form a rear cavity, and the bracket is provided with a sound guide channel connecting the first front cavity and the second front cavity to the sound outlet hole, and the sound guide channel is isolated from the rear cavity; In a vibration direction perpendicular to the vibration unit, at least a portion of the sound outlet hole is opposite to the magnetic circuit unit.

2. The sound generating device according to claim 1, characterized in that: The bracket has a top surface and a bottom surface, and the top surface and the bottom surface are located on opposite sides of the side surface; The sound guide channel includes a first channel that passes through the top surface and connects the first front cavity and the sound outlet hole, and a second channel that passes through the bottom surface and connects the second front cavity and the sound outlet hole.

3. The sound-generating device according to claim 2, characterized in that: The first front cavity and the first channel form a first space, the second front cavity and the second channel form a second space, and both the first space and the second space are isolated from the rear cavity.

4. The sound-generating device according to claim 2, characterized in that: The first passage and the second passage communicate with each other in a vibration direction of the vibration unit.

5. The sound generating device according to claim 2, characterized in that: The first channel includes a first port located on the top surface, the second channel includes a second port located on the bottom surface, the first port is located on the outer peripheral side of the first vibration component, and the second port is located on the outer peripheral side of the second vibration component.

6. The sound generating device according to claim 5, 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 first port, the second port, the first channel and the second channel are all arranged on the extension portion.

7. The sound-generating device according to claim 2, characterized in that: The cover unit further comprises an upper cover and a lower cover, wherein the upper cover is connected to the top surface of the bracket, and the lower cover is connected to the bottom surface 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.

8. The sound generating device according to claim 7, characterized in that: 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 first channel, and at least part of the second protrusion corresponds to the second channel.

9. The sound generating device according to claim 2, 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, and a side of the second bracket away from the first bracket forms the bottom surface; The sound outlet is arranged between the first bracket and the second bracket.

10. The sound generating device according to claim 9, 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 peripheral accommodating area, the central magnetic part is arranged in the middle accommodating area, and the side magnetic part is arranged in the peripheral accommodating area; The edge magnet portion includes an edge washer, an edge of the yoke is assembled to the first bracket, and an edge of the edge washer is assembled to the second bracket.

11. The sound generating device according to claim 1, characterized in that: The bracket is provided with a leakage hole communicating with the rear cavity; 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 of the sound-emitting device 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 of the sound-emitting device 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 comprises a housing, wherein the sound-generating device is connected to the housing through the bracket; The shell is provided with an external sound hole, and the external sound hole is opposite to and communicated with the sound outlet hole.

14. The acoustic device according to claim 13, characterized in that The outer shell is provided with an external leakage hole, an outer rear cavity is provided between the outer shell and the cover unit, and the bracket is provided with a leakage hole; Wherein, the rear cavity is connected to the outer rear cavity through the leakage hole, and the outer rear cavity is connected to the outside of the acoustic device through the external leakage hole.

Images