Sound production device and electronic equipment

Abstract

The utility model discloses a sounding device and electronic equipment, relates to electroacoustic transduction technical field, the sounding device includes casing, sounding unit and mesh enclosure, the casing has cavity and intercommunication cavity's mounting mouth, sounding unit is provided in the cavity, sounding unit is provided with the diaphragm corresponding to mounting mouth, the mesh enclosure is provided with the diaphragm. The mesh enclosure comprises a top part and a side part which are arranged at an included angle, the side part is connected to the shell, and the top part is opposite to the vibrating diaphragm, so that the mesh enclosure covers the mounting opening; and airflow holes are formed in the top part and the side parts. The utility model aims to provide the sound production device capable of effectively improving the high-frequency performance of the loudspeaker, the sound production device is applied to the loudspeaker outside a vehicle, the effective frequency range of the loudspeaker can be widened, the influence of external airflow can be reduced or avoided, and the sound production device has a higher sound pressure level.

Description

Technical Field

[0001] The utility model relates to the technical field of electroacoustic transducers, and particularly relates to a sound generating device and an electronic device applying the sound generating device. Background Art

[0002] With the rapid development of technology, loudspeakers are more and more widely used, and can be applied not only in portable electronic devices (such as mobile phones, earphones, computers), but also in devices such as vehicles.

[0003] As is well known, an electric vehicle usually includes multiple loudspeakers for different functions and applications; for example, each electric vehicle needs to include a signal horn that generates sound at a relatively high frequency; for another example, some electric vehicles also include multiple warning loudspeakers, and these warning loudspeakers can output a synthetic engine sound similar to that of a conventional combustion engine to warn pedestrians or other road users of the presence of the vehicle; for another example, many other loudspeakers for other applications in electric vehicles. At present, in order to upgrade the vehicle cost, energy conservation and functions, an external integrated loudspeaker that integrates multiple functions such as pedestrian safety warning, external voice broadcast and signal horn has appeared on the market.

[0004] In the related art, the overall product volume of the external integrated loudspeaker is large due to low integration, and the product integrated structure design is still unreasonable. For example, the loudspeaker box and its grille are designed in a vertical fence shape, and the side of the grille is closed and only the top is ventilated, which has a great impact on the acoustic performance, especially the effective frequency range, resulting in disadvantages such as poor high-frequency performance of the loudspeaker, low sensitivity, and high distortion of the overall sound quality. Summary of the Utility Model

[0005] The main purpose of the utility model is to provide a sound generating device and an electronic device, aiming to provide a sound generating device that can effectively improve the high-frequency performance of the loudspeaker. The sound generating device is applied to an external loudspeaker, can broaden its effective frequency range, and can reduce or avoid the influence of external airflow at the same time, and has a high sound pressure level.

[0006] To achieve the above purpose, the utility model proposes a sound generating device, and the sound generating device includes:

[0007] A housing, the housing has a cavity and an installation opening communicating with the cavity;

[0008] A sound generating unit, the sound generating unit is arranged in the cavity, and the sound generating unit is provided with a diaphragm corresponding to the installation opening; and

[0009] A grille, the grille includes a top and a side portion arranged at an angle, the side portion is connected to the housing, and the top is opposite to the diaphragm, so that the grille covers the installation opening;

[0010] Wherein, air flow holes are formed in both the top portion and the side portion.

[0011] In one embodiment, the side portion surrounds the periphery of the top portion and encloses a receiving cavity with the top portion. One end of the side portion away from the top portion is connected to the housing, and the air flow holes communicate with the receiving cavity.

[0012] The air flow holes include first air flow holes formed in the top portion and second air flow holes formed in the side portion.

[0013] In one embodiment, the opening area of the second air flow holes is greater than 0.6 times the area of the side portion.

[0014] And / or, the projected area of the first air flow holes on a horizontal plane is less than 10% of the projected area of the top portion on the horizontal plane.

[0015] And / or, the second air flow holes are at least one of circular holes, oval holes, strip holes, arc holes, polygon holes, and special-shaped holes.

[0016] And / or, the first air flow holes are at least one of circular holes, oval holes, strip holes, arc holes, polygon holes, and special-shaped holes.

[0017] And / or, the aperture or hole gap of the second air flow holes is greater than or equal to the aperture or hole gap of the first air flow holes.

[0018] In one embodiment, the side portion includes a first vertical wall, a flat portion, and a second vertical wall. One end of the first vertical wall is connected to the top portion and encloses the receiving cavity with the top portion. The flat portion is disposed on a side of the first vertical wall facing away from the receiving cavity and extends in a direction away from the receiving cavity. One end of the second vertical wall is connected to a side of the flat portion facing away from the top portion and extends toward the housing.

[0019] The housing is provided with an installation groove around the installation opening, and one end of the second vertical wall away from the flat portion is received and limited in the installation groove.

[0020] In one embodiment, the top portion includes a plurality of rib strips intersecting with each other. At least part of the rib strips are connected to the side portion, and the first air flow holes are formed between adjacent rib strips.

[0021] In one embodiment, the plurality of ribs include a plurality of first ribs extending linearly in the radial direction and a plurality of second ribs extending linearly in the circumferential direction. Both ends of the plurality of first ribs and the plurality of second ribs are fixedly connected to the side portion. The first air holes are formed between adjacent first ribs and adjacent second ribs, and the upper and lower ends of the first air holes in the vibration direction of the diaphragm are staggeredly arranged.

[0022] Alternatively, the plurality of ribs include a plurality of first ribs extending in the radial direction and a plurality of second ribs extending in the circumferential direction. The plurality of second ribs are arranged at intervals in the radial direction and are connected to the first ribs. The plurality of first ribs are arranged radially and are connected to the side portion. The first air holes are formed between two adjacent second ribs and adjacent first ribs, and the first air holes are in the shape of an arc-shaped slit.

[0023] In one embodiment, the top portion includes a recessed portion and a flat portion connected to the outside of the recessed portion. The edge of the flat portion away from the recessed portion is connected to the side portion. The recessed portion is recessed toward the side close to the diaphragm to form a recessed groove.

[0024] In one embodiment, the diaphragm includes a cone, a surround portion surrounding the cone, and a fixing portion located outside the surround portion. The fixing portion is clamped between the sound generating unit and the side portion. The projection of the surround portion on the top portion is within the range of the flat portion.

[0025] And / or, the distance between the side of the recessed portion facing the diaphragm and the diaphragm is greater than the maximum amplitude of the diaphragm.

[0026] And / or, defining the distance between the bottom of the recessed groove and the flat portion as the depth of the recessed groove, the depth of the recessed groove is not greater than the height of the side portion.

[0027] In one embodiment, the sound generating unit includes:

[0028] A chassis, the chassis is disposed in the cavity and is connected to the housing;

[0029] A magnetic circuit system, the magnetic circuit system is connected to one end of the chassis away from the mounting opening, and the magnetic circuit system is provided with a magnetic gap; and

[0030] A vibration system, the vibration system includes the diaphragm and a voice coil connected to the diaphragm. The periphery of the diaphragm is connected to one end of the chassis adjacent to the mounting opening, and is opposite to and spaced from the magnetic circuit system. The voice coil is suspended in the magnetic gap.

[0031] In one embodiment, the housing includes an upper housing and a lower housing. The upper housing and the lower housing are butt - connected and enclose to form the cavity. The upper housing is provided with the installation opening. One end of the speaker frame away from the magnetic circuit system is connected to the upper housing and corresponds to the installation opening. The speaker frame and the upper housing are of an integrally - formed structure.

[0032] The present utility model further provides an electronic device, and the electronic device includes the sound - producing device described above.

[0033] The sound - producing device of the technical solution of the present utility model is provided with a cavity and an installation opening communicating with the cavity in the housing. In this way, it is convenient to install and fix the sound - producing unit by using the installation opening, and the housing can be used to protect the sound - producing unit. When the sound - producing unit works, sound is emitted outward through the diaphragm via the installation opening. At the same time, a net cover is arranged at the installation opening of the housing. The net cover covers the installation opening, and air - flow holes are arranged on the net cover. Thus, the net cover can further provide safety protection for the sound - producing unit at the installation opening, and air - flow circulation and sound passage can be realized through the air - flow holes. Further, the net cover is set to have a top and a side portion arranged at an angle. By connecting the side portion to the housing, the top is opposite to the diaphragm, so as to cover the installation opening with the net cover. And by opening air - flow holes on both the top and the side portion of the net cover, the influence of the side portion of the net cover on the acoustic performance of the sound - producing unit can be eliminated, the high - frequency performance of the sound - producing device can be effectively improved, its effective frequency range can be broadened, and the influence of external air - flow can be reduced or avoided, and it has a relatively high sound pressure level. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following - described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0035] Figure 1 It is a top - view structural schematic diagram of an embodiment of the sound - producing device provided by the present utility model;

[0036] Figure 2 For Figure 1 the sectional schematic diagram taken along the A - A direction in

[0037] Figure 3 For Figure 2 the enlarged schematic diagram at B in

[0038] Figure 4 It is a top - view structural schematic diagram of another embodiment of the sound - producing device provided by the present utility model;

[0039] Figure 5 is Figure 4 a schematic cross-sectional view in the C-C direction;

[0040] Figure 6 is a schematic cross-sectional view of an embodiment of the wire mesh cover provided by the present utility model;

[0041] Figure 7 is a comparison diagram of the FR curves of the sound generating device provided by the present utility model and the prior art.

[0042] Explanation of the reference numerals in the drawings:

[0043] 100, sound generating device; 1, housing; 11, cavity; 12, upper shell; 121, mounting opening; 122, mounting groove; 13, lower shell; 2, sound generating unit; 21, chassis; 22, magnetic circuit system; 221, magnetic gap; 23, vibration system; 231, diaphragm; 2311, cone; 2312, surround; 2313, fixing part; 232, voice coil; 3, wire mesh cover; 31, top; 311, rib; 3111, first rib; 3112, second rib; 312, recessed part; 3121, recessed groove; 313, flat part; 32, side part; 321, first vertical wall; 322, flat part; 323, second vertical wall; 33, air flow hole; 331, first air flow hole; 332, second air flow hole; 34, accommodating cavity.

[0044] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0045] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0046] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between the components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0047] At the same time, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three solutions. Taking "A and / or B" as an example, it includes the A solution, or the B solution, or the solution where A and B are satisfied simultaneously.

[0048] In addition, in the present utility model, descriptions such as "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0049] With the rapid development of technology, loudspeakers are more and more widely used, and can be applied not only in portable electronic devices (such as mobile phones, earphones, computers), but also in devices such as vehicles.

[0050] As is well known, an electric vehicle usually includes multiple loudspeakers for different functions and applications; for example, each electric vehicle needs to include a signal horn that generates sound at a relatively high frequency; for another example, some electric vehicles also include multiple warning loudspeakers, and these warning loudspeakers can output a synthetic engine sound similar to that of a conventional combustion engine to warn pedestrians or other road users of the presence of the vehicle; for another example, many other loudspeakers for other applications in electric vehicles. At present, in order to upgrade the vehicle cost, energy saving and functions, there has emerged an external integrated loudspeaker on the market that integrates multiple functions such as pedestrian safety warning, external voice broadcast and signal horn.

[0051] In the related art, due to the low integration level of the external integrated loudspeaker, the overall product volume is relatively large, and due to the unreasonable design of the product integration structure, for example, the loudspeaker box and its grille are designed in a vertical fence shape, and the side of the grille is closed and only the top is ventilated, which has a great impact on the acoustic performance, especially the effective frequency range, resulting in disadvantages such as poor high-frequency performance of the loudspeaker, low sensitivity, and high distortion of the overall sound quality.

[0052] Based on the above concepts and problems, the present utility model proposes a sound generating device 100. It can be understood that the sound generating device 100 can be applied to electronic devices, and the electronic devices can be smart watches, mobile phones, audio systems, computers, earphones or televisions, etc.; or, the electronic devices can also be large intelligent devices or devices such as vehicles, etc., which are not limited herein.

[0053] The sound generating device 100 in this embodiment is suitable for use in outdoor environments, for example, used in an external speaker of an automobile (specifically, a new energy vehicle driven by a battery, typically an electric vehicle). The external speaker includes a box body and the above-mentioned sound generating device 100. The sound generating device 100 is disposed in the box body and can be used to emit a pedestrian warning sound, such as simulating the sound of an engine of a traditional automobile, to inform pedestrians that a vehicle is approaching or to improve the driving experience of the driver.

[0054] Please refer to Figures 1 to 6 As shown, in the embodiment of the present invention, the sound generating device 100 includes a housing 1, a sound generating unit 2, and a grille 3. The housing 1 has a cavity 11 and an installation opening 121 communicating with the cavity 11. The sound generating unit 2 is disposed in the cavity 11. The sound generating unit 2 is provided with a diaphragm 231 corresponding to the installation opening 121. The grille 3 includes a top portion 31 and a side portion 32 disposed at an angle. The side portion 32 is connected to the housing 1. The top portion 31 faces the diaphragm 231 so that the grille 3 covers the installation opening 121; wherein, both the top portion 31 and the side portion 32 are provided with air flow holes 33.

[0055] In this embodiment, the housing 1 is used to install, fix, and protect components such as the sound generating unit 2 and the grille 3, that is, the housing 1 provides a support basis for the sound generating unit 2 and the grille 3. It can be understood that the housing 1 can be a shell, a box body, a box or other structures, as long as it can install, fix, and protect the sound generating unit 2 and the grille 3, and no limitation is made here.

[0056] Optionally, the housing 1 can be an integral structure or a split structure. In this embodiment, as Figures 1 to 5 shown, the housing 1 includes an upper shell 12 and a lower shell 13. The upper shell 12 is connected to the lower shell 13 to enclose and form the cavity 11. It can be understood that the upper shell 12 and the lower shell 13 are also connected and fixed by welding or bonding and the like, so as to improve the structural strength and sealing effect of the housing 1. Of course, in other embodiments, the upper shell 12 and the lower shell 13 can also be connected by detachable methods such as snap connection, plug-in fit, screw connection, or pin connection, so as to facilitate the disassembly and assembly of the sound generating unit 2, and no limitation is made here.

[0057] It can be understood that one of the upper shell 12 and the lower shell 13 of the housing 1 is a flat structure, and the other is a U-shaped groove structure. At this time, the flat structure covers the opening of the U-shaped groove structure to enclose and form the cavity 11. Of course, the upper shell 12 and the lower shell 13 of the housing 1 can also be both set as U-shaped groove structures. At this time, the upper shell 12 and the lower shell 13 are butt-connected to enclose and form the cavity 11. Optionally, the upper shell 12 is provided with an installation opening 121 communicating with the cavity 11, and no limitation is made here.

[0058] In this embodiment, the outer contour of the housing 1 can be a cylindrical shape, a square shape, a polygonal structure, or an irregular special-shaped structure, etc., which is specifically adjusted according to the application scenario of the sound generating device 100 and is not limited herein. It can be understood that when the sound generating device 100 is applied to an electronic device, it can be connected and fixed to the electronic device through the housing 1, that is, the housing 1 of the sound generating device 100 and the electronic device are of a split design structure. Of course, in other embodiments, the housing 1 of the sound generating device 100 and the electronic device can also be set as an integral structure, which is not limited herein.

[0059] It can be understood that the sound generating unit 2 can be a micro speaker or a horn speaker, etc., which is not limited herein. The sound generating unit 2 has a diaphragm 231 that reciprocally vibrates along a movement axis extending in an up and down direction. When the sound generating unit 2 works, the diaphragm 231 vibrates to generate sound. In this embodiment, the sound generating unit 2 is installed in the cavity 11 of the housing 1, and the diaphragm 231 is correspondingly arranged at the installation opening 121.

[0060] In this embodiment, the mesh cover 3 is arranged above the sound generating unit 2. Specifically, the mesh cover 3 is installed on the housing 11 and covers the sound generating unit 2, and is used to provide protection for the sound generating unit 2 to protect the relatively fragile components inside the sound generating unit 2, such as the diaphragm 231, etc. The mesh cover 3 has a top 31 facing the upper surface of the diaphragm 231 and a side portion 32 located outside the periphery of the diaphragm 231. The mesh cover 3 is connected to the housing 1 through the side portion 32, and the top 31 is supported by the side portion 32 to be located above the diaphragm 231 and spaced from the diaphragm 231, so as to avoid interference between the diaphragm 231 and the top 31 during vibration and affect the sound generation effect.

[0061] It can be understood that the mesh cover 3 has a rigid side portion 32, and the side portion 32 is fixedly connected to the housing 1. The mesh cover 3 and the housing 1 can be fixedly connected, such as by welding, bonding, etc. Of course, for the convenience of disassembly and assembly, the mesh cover 3 and the housing 1 can also be detachably connected, such as by snap connection, plug-in fit, screw connection, pin connection, or by screw connection, etc., which is not limited herein.

[0062] In this embodiment, air flow holes 33 are provided on both the top 31 and the side portion 32 of the mesh cover 3. In this way, it can not only form air flow holes 33 to allow sound and air flow to pass through, but also realize the protection and safeguarding effect on the diaphragm 231. In this way, the influence of the side portion 32 of the mesh cover 3 on the acoustic performance of the sound generating unit 2 can be eliminated, the high-frequency performance of the sound generating device 100 can be effectively improved, its effective frequency range can be broadened, and the influence of external air flow can be reduced or avoided, and it has a relatively high sound pressure level.

[0063] It can be understood that Figure 7This is a comparison chart of the FR curve of the sound generating device 100 of the present application and the FR curve of an existing conventional loudspeaker. The abscissa of the FR curve is in Hz, and the ordinate is in dB. In the present application, the sound generating device 100 (flat) has a sensitivity increase of approximately 3 dB at 4.5 kHz, and the effective frequency range is increased from the original 7 kHz to 8 kHz; in the present application, the sound generating device 100 (concave) has a sensitivity of 5 dB at 3.7 kHz, and the effective frequency range is increased to 15 kHz.

[0064] The sound generating device 100 of the present utility model is provided with a cavity 11 and an installation opening 121 communicating with the cavity 11 in the housing 1. In this way, it is convenient to install and fix the sound generating unit 2 through the installation opening 121, and the housing 1 can be used to protect and safeguard the sound generating unit 2. When the sound generating unit 2 is working, sound is emitted outward through the diaphragm 231 via the installation opening 121; meanwhile, a mesh cover 3 is provided at the installation opening 121 of the housing 1, the mesh cover 3 covers the installation opening 121, and air flow holes 33 are provided on the mesh cover 3. Thus, the mesh cover 3 can be used to further provide safety protection for the sound generating unit 2 at the installation opening 121, and air flow can be achieved through the air flow holes 33 and sound can be allowed to pass through; further, the mesh cover 3 is provided with a top portion 31 and a side portion 32 arranged at an angle. By connecting the side portion 32 to the housing 1, the top portion 31 is opposite to the diaphragm 231, so as to realize the mesh cover 3 covering the installation opening 121. And by providing air flow holes 33 on both the top portion 31 and the side portion 32 of the mesh cover 3, the influence of the side portion 32 of the mesh cover 3 on the acoustic performance of the sound generating unit 2 can be eliminated, the high-frequency performance of the sound generating device 100 can be effectively improved, its effective frequency range can be broadened, and the influence of external air flow can be reduced or avoided, and it has a relatively high sound pressure level.

[0065] In an embodiment, the side portion 32 is disposed around the periphery of the top portion 31 and encloses a receiving cavity 34 with the top portion 31. One end of the side portion 32 far from the top portion 31 is connected to the housing 1, and the air flow holes 33 communicate with the receiving cavity 34; the air flow holes 33 include a first air flow hole 331 opened on the top portion 31 and a second air flow hole 332 opened on the side portion 32.

[0066] In this embodiment, as Figure 2 、 Figure 3 、 Figure 5 and Figure 6 shown, the side portion 32 of the mesh cover 3 is disposed in a circle around the periphery of the top portion 31. Optionally, the side portion 32 is perpendicularly disposed with respect to the top portion 31, so that the side portion 32 and the top portion 31 enclose a receiving cavity 34. It can be understood that the mesh cover 3 is connected to the housing 1 through the side portion 32 to cover the installation opening 121. At this time, a part of the diaphragm 231 of the sound generating unit 2 is received in the receiving cavity 34 of the mesh cover 3, so that the top portion 31 is directly opposite to the diaphragm 231 and is arranged at an interval.

[0067] Optionally, the side portion 32 has an annular structure. The air flow holes 33 in the top portion 31 and the air flow holes 33 in the side portion 32 are both communicated with the accommodation cavity 34. In this embodiment, as Figure 2 , Figure 3 , Figure 5 and Figure 6 shown, the air flow hole 33 includes a first air flow hole 331 opened in the top portion 31 and a second air flow hole 332 opened in the side portion 32.

[0068] It can be understood that, in order to ensure that the air flow holes 33 of the mesh cover 3 can eliminate the influence of the mesh cover 3 on the acoustic performance of the sound generating unit 2, and can reduce or avoid the influence of external air flow, and have a relatively high sound pressure level. Optionally, the top portion 31 is provided with a plurality of first air flow holes 331, and the plurality of first air flow holes 331 are arranged at intervals. The side portion 32 is provided with a plurality of second air flow holes 332, and the plurality of second air flow holes 332 are arranged at intervals.

[0069] It can be understood that the plurality of first air flow holes 331 can be arranged in a regular array on the top portion 31, or can be arranged irregularly on the top portion 31, which is not limited herein. Of course, the plurality of second air flow holes 332 can be arranged in a regular array on the side portion 32, or can be arranged irregularly on the side portion 32, which is not limited herein.

[0070] In this embodiment, the outer contour of the first air flow hole 331 in the top portion 31 and the outer contour of the second air flow hole 332 in the side portion 32 can be the same or different, which is not limited herein. Optionally, the first air flow hole 331 is at least one of a circular hole, an oval hole, a strip hole, an arc hole, a polygonal hole, and a special-shaped hole. It can be understood that the outer contours of the plurality of first air flow holes 331 in the top portion 31 can be all the same structure, or can be completely different, and of course can also be partially the same, etc., which is not limited herein.

[0071] Optionally, the second air flow hole 332 is at least one of a circular hole, an oval hole, a strip hole, an arc hole, a polygonal hole, and a special-shaped hole. It can be understood that the outer contours of the plurality of second air flow holes 332 in the side portion 32 can be all the same structure, or can be completely different, and of course can also be partially the same, etc., which is not limited herein.

[0072] It can be understood that, in order to facilitate the processing of the mesh cover 3, the outer contours of the plurality of first air flow holes 331 in the top portion 31 are consistent, and the outer contours of the plurality of second air flow holes 332 in the side portion 32 are consistent, which is not limited herein.

[0073] In order to ensure that the air flow holes 33 of the grille 3 can eliminate the influence of the grille 3 on the acoustic performance of the sound generating unit 2, and can reduce or avoid the influence of external air flow, and have a relatively high sound pressure level. In one embodiment, the opening area of the second air flow holes 332 is greater than 0.6 times the area of the side portion 32. Optionally, the opening ratio of the second air flow holes 332 in the side portion 32 is greater than 60%, which is not limited herein.

[0074] Optionally, the projected area of the first air flow holes 331 in the horizontal plane is less than 10% of the projected area of the top portion 31 in the horizontal plane. It can be understood that such a setting can ensure that the sound of the diaphragm 231 can smoothly pass through the first air flow holes 331 in the top portion 31, and can also prevent external sundries from entering the grille 3, so as not to affect the sound generating effect of the sound generating unit 2, and can reduce or avoid the influence of external air flow, and have a relatively high sound pressure level.

[0075] In this embodiment, the aperture or hole gap of the second air flow holes 332 is greater than or equal to the aperture or hole gap of the first air flow holes 331. It can be understood that since the side portion 32 is not directly opposite to the diaphragm 231, setting the second air flow holes 332 in the side portion 32 to be larger can eliminate the influence of the grille 3 on the acoustic performance of the sound generating unit 2, and can reduce or avoid the influence of external air flow, and have a relatively high sound pressure level.

[0076] In one embodiment, the top portion 31 includes a plurality of rib strips 311 that intersect with each other, at least some of the rib strips 311 are connected to the side portion 32, and the first air flow holes 331 are formed between adjacent rib strips 311.

[0077] In this embodiment, as Figures 1 to 6 shown, the top portion 31 of the grille 3 is arranged in a grid structure, that is, the top portion 31 includes a plurality of rib strips 311 that intersect with each other, and the rib strips 311 are connected to the side portion 32. Optionally, the top portion 31 and the side portion 32 of the grille 3 are integrally injection molded, that is, the rib strips 311 of the top portion 31 and the side portion 32 are integrally injection molded, which can simplify the processing process and is not limited herein.

[0078] It can be understood that the side portion 32 of the grille 3 can also be arranged in a grid structure, that is, the side portion 32 includes a plurality of rib strips that intersect with each other, so that the second air flow holes 332 are formed between adjacent rib strips, which is not limited herein. In this embodiment, in order to ensure the structural strength and rigidity of the grille 3, the side portion 32 of the grille 3 is preferably a rigid ring structure.

[0079] In one embodiment, the plurality of ribs 311 includes a plurality of first ribs 3111 extending linearly in the radial direction and a plurality of second ribs 3112 extending linearly in the circumferential direction. Both ends of the plurality of first ribs 3111 and the plurality of second ribs 3112 are fixedly connected to the side portion 32. A first air hole 331 is formed between adjacent first ribs 3111 and adjacent second ribs 3112. The upper end and the lower end of the first air hole 331 in the vibration direction of the diaphragm 231 are staggeredly arranged.

[0080] In this embodiment, the plurality of ribs 311 on the top portion 31 all extend linearly. The plurality of first ribs 3111 and the plurality of second ribs 3112 are optionally arranged perpendicularly, that is, the plurality of first ribs 3111 extend linearly in the radial direction and are spaced apart, and the plurality of second ribs 3112 extend linearly in the circumferential direction and are spaced apart. In this way, both ends of the plurality of first ribs 3111 and both ends of the plurality of second ribs 3112 are fixedly connected to the side portion 32, so as to form a first air hole 331 between adjacent first ribs 3111 and adjacent second ribs 3112.

[0081] In order to reduce or avoid the influence of external air flow and have a higher sound pressure level. Optionally, the upper end and the lower end of the first air hole 331 in the vibration direction of the diaphragm 231 are staggeredly arranged. In this embodiment, the cross-section of the first rib 3111 and / or the second rib 3112 is arranged in a structure such as a T shape, a V shape, a Y shape or a wedge shape, which is not limited herein.

[0082] In one embodiment, the plurality of ribs 311 includes a plurality of first ribs 3111 extending in the radial direction and a plurality of second ribs 3112 extending in the circumferential direction. The plurality of second ribs 3112 are arranged at intervals in the radial direction and are connected to the first ribs 3111. The plurality of first ribs 3111 are arranged radially and are connected to the side portion 32. A first air hole 331 is formed between two adjacent second ribs 3112 and an adjacent first rib 3111. The first air hole 331 is in the shape of an arc-shaped slit.

[0083] In this embodiment, as Figures 1 to 6 shown, the plurality of first ribs 3111 extend radially from the center of the top portion 31 to the peripheral direction, so that one end of the plurality of first ribs 3111 adjacent to the periphery of the top portion 31 is connected to the side portion 32. The plurality of second ribs 3112 are arranged at intervals along the extension direction of the first ribs 3111 in a plurality of concentric circular rings and are connected to the plurality of first ribs 3111, so as to form a first air hole 331 between two adjacent second ribs 3112 and an adjacent first rib 3111. Optionally, the first air hole 331 is in the shape of an arc-shaped slit.

[0084] In one embodiment, the side portion 32 includes a first vertical wall 321, a flat portion 322, and a second vertical wall 323. One end of the first vertical wall 321 is connected to the top portion 31 and encloses a receiving cavity 34 with the top portion 31. The flat portion 322 is disposed on the side of the first vertical wall 321 facing away from the receiving cavity 34 and extends in a direction away from the receiving cavity 34. One end of the second vertical wall 323 is connected to the side of the flat portion 322 facing away from the top portion 31 and extends toward the housing 1; the housing 1 is provided with a mounting groove 122 around the mounting opening 121, and the end of the second vertical wall 323 away from the flat portion 322 is received and limited within the mounting groove 122.

[0085] In this embodiment, as Figure 2 , Figure 3 , Figure 5 and Figure 6 shown, by providing the mounting groove 122 around the mounting opening 121 in the housing 1 and receiving and limiting a part of the side portion 32 of the mesh cover 3 within the mounting groove 122, it is possible to provide both the mounting stability of the mesh cover 3 and ensure the sealing effect at the connection.

[0086] It can be understood that the first vertical wall 321 of the side portion 32 is connected to the top portion 31 and is vertically arranged. Optionally, the second air hole 332 is provided in the first vertical wall 321. The flat portion 322 is disposed outside the first vertical wall 321 and extends in a direction perpendicular to the first vertical wall 321, so that the flat portion 322 can be used to connect to the top of the housing 1 to play a role of support and limitation. Optionally, the flat portion 322 is located at the end of the first vertical wall 321 away from the top portion 31. Optionally, the flat portion 322 is parallel to the top portion 31. The second vertical wall 323 is located below the flat portion 322, that is, the second vertical wall 323 extends toward the housing 1 and is located on the side of the flat portion 322 facing away from the top portion 31. Optionally, the second vertical wall 323 has the same extension direction as the first vertical wall 321, and the second vertical wall 323 is parallel to the first vertical wall 321, and the second vertical wall 323 is located outside the projection of the first vertical wall 321.

[0087] In this embodiment, the end of the second vertical wall 323 of the side portion 32 away from the flat portion 322 is received and limited within the mounting groove 122, and the flat portion 322 of the side portion 32 abuts against the top of the housing 1 to ensure that the first vertical wall 321 of the side portion 32 supports the top portion 31 at a certain height, thereby avoiding interference between the top portion 31 and the diaphragm 231.

[0088] In one embodiment, the top portion 31 includes a recessed portion 312 and a flat portion 313 connected to the outside of the recessed portion 312. The edge of the flat portion 313 away from the recessed portion 312 is connected to the side portion 32, and the recessed portion 312 is recessed toward the side close to the diaphragm 231 to form a recessed groove 3121.

[0089] In this embodiment, as Figures 4 to 6 shown, a recessed portion 312 is provided at the top 31 of the mesh cover 3, that is, the recessed portion 312 is recessed toward the side close to the diaphragm 231 to form a recessed groove 3121. It can be understood that such a setting can cause the recessed portion 312 of the mesh cover 3 to resonate with the vibration system 23 of the sound generating unit 2, thereby further improving the acoustic performance.

[0090] To avoid the interference of the recessed portion 312 at the top 31 on the surround portion 2312 of the diaphragm 231, in one embodiment, the diaphragm 231 includes a cone 2311, a surround portion 2312 disposed around the cone 2311, and a fixing portion 2313 located outside the surround portion 2312. The fixing portion 2313 is clamped between the sound generating unit 2 and the side portion 32, and the projection of the surround portion 2312 at the top 31 is within the range of the flat portion 313.

[0091] It can be understood that the cross-section of the top 31 of the mesh cover 3 is designed in a trapezoidal recessed shape, which can resonate with the vibration system 23 of the sound generating unit 2, thereby further improving the acoustic performance, and the effect is more obvious. In this embodiment, along the projection in the vibration direction of the diaphragm 231, the projection of the flat portion 313 of the top 31 is larger than the projection of the surround portion 2312 of the diaphragm 231, that is, the projection of the surround portion 2312 of the diaphragm 231 is completely within the projection range of the flat portion 313 of the top 31.

[0092] Optionally, the distance between the side of the recessed portion 312 facing the diaphragm 231 and the diaphragm 231 is greater than the maximum amplitude of the diaphragm 231. It can be understood that such a setting can ensure that during the vibration of the diaphragm 231, the cone 2311 of the diaphragm 231 will not collide with or interfere with the recessed portion 312.

[0093] In one embodiment, the distance between the bottom of the recessed groove 3121 and the flat portion 313 is defined as the depth of the recessed groove 3121, and the depth of the recessed groove 3121 is not greater than the height of the side portion 32. It can be understood that as Figure 6 shown, the protruding height of the recessed portion 312 is not greater than the height of the side portion 32. In this way, it can resonate with the vibration system 23 of the sound generating unit 2 and can reasonably design the structure to avoid interference between the mesh cover 3 and the diaphragm 231.

[0094] In one embodiment, the sound generating unit 2 includes a chassis 21, a magnetic circuit system 22, and a vibration system 23. The chassis 21 is disposed in the accommodation cavity 11 and connected to the housing 1. The magnetic circuit system 22 is connected to one end of the chassis 21 away from the mounting opening 121. The magnetic circuit system 22 is provided with a magnetic gap 221. The vibration system 23 includes a diaphragm 231 and a voice coil 232 connected to the diaphragm 231. The periphery of the diaphragm 231 is connected to one end of the chassis 21 adjacent to the mounting opening 121, and is opposite to and spaced from the magnetic circuit system 22. The voice coil 232 is suspended in the magnetic gap 221.

[0095] In this embodiment, as Figure 2 and Figure 5 shown, the chassis 21 of the sound generating unit 2 provides a mounting base for the magnetic circuit system 22 and the vibration system 23. The chassis 21 can be selected as a bowl-shaped structure. The chassis 21 has a mounting cavity with openings at both ends. One end of the chassis 21 is connected to one side of the housing 1 adjacent to the mounting opening 121, so that the mounting opening 121 is connected to the mounting cavity through the opening at one end of the chassis 21. The periphery of the diaphragm 231 is connected to one end of the chassis 21 adjacent to the mounting opening 121, so that the diaphragm 231 closes the opening at one end of the chassis 21. The magnetic circuit system 22 is connected to one end of the chassis 21 away from the diaphragm 231, and the magnetic circuit system 22 is provided with a magnetic gap 221. At this time, one end of the voice coil 232 is connected to the cone 2311 of the diaphragm 231, and the other end of the voice coil 232 is suspended in the magnetic gap 221.

[0096] It can be understood that when an electric current is passed into the voice coil 232, the magnetic circuit system 22 provides an external magnetic field after the voice coil 232 is energized, so as to drive the voice coil 232 to vibrate reciprocally along the above-mentioned movement axis, thereby driving the diaphragm 231 to vibrate and generate sound. It should be understood that for the convenience of description and understanding, the movement axis in the drawings extends in the up and down direction; in fact, the movement axis can be oriented in any direction, including but not limited to: the vertical direction, the horizontal direction, or inclined and intersecting with the horizontal plane, specifically depending on the installation space and design requirements of the sound generating device 100 on the vehicle.

[0097] In this embodiment, the sound generating unit 2 is fixed in the accommodation cavity 11 of the housing 1 through the rigid chassis 21. Specifically, the magnetic circuit system 22, the voice coil 232, etc. of the sound generating unit 2 are all located in the accommodation cavity 11. In some embodiments, the diaphragm 231 may also be located in the accommodation cavity 11; or the entire chassis 21 is also located in the accommodation cavity 11, or only partially exposed outside the accommodation cavity 11, which is not limited herein.

[0098] It can be understood that the magnetic circuit system 22 can be formed by a U-shaped iron and a central magnetic part, such that a magnetic gap 221 is formed by spacing the central magnetic part from the side walls of the U-shaped iron. Alternatively, it can be formed by a magnetic yoke, a side magnetic part, and a central magnetic part provided on the magnetic yoke, such that the side magnetic part is located outside the central magnetic part and forms a magnetic gap 221 with the central magnetic part. This is not limited herein. In this embodiment, the chassis 21 of the sound generating unit 2 can be selected as a plastic part, and the chassis 21 and the U-shaped iron of the magnetic circuit system 22 can be injection molded.

[0099] In one embodiment, the housing 1 includes an upper housing 12 and a lower housing 13. The upper housing 12 and the lower housing 13 are butt-connected and enclose to form a cavity 11. The upper housing 12 is provided with an installation opening 121. One end of the chassis 21 away from the magnetic circuit system 22 is connected to the upper housing 12 and corresponds to the installation opening 121. The chassis 21 and the upper housing 12 are of an integrally formed structure.

[0100] In this embodiment, as Figure 2 and Figure 5 shown, the housing 1 can be selected as a plastic part, that is, the upper housing 12 and the lower housing 13 of the housing 1 can be injection molded separately. To further improve the connection stability between the housing 1 and the sound generating unit 2, the housing 1 and the chassis 21 of the sound generating unit 2 can be integrally injection molded. Optionally, the chassis 21 and the upper housing 12 are of an integrally formed structure.

[0101] Comparative Example 1

[0102] Referring to Figure 2 shown, the difference between the sound generating device provided in Comparative Example 1 and the embodiment is that: the side part of the grille of the sound generating device in Comparative Example 1 is not provided with air flow holes, and the other parts are exactly the same as those in the embodiment.

[0103] Sound effect evaluation:

[0104] Select Figure 2 the planar embodiment shown, Figure 5 the sunken embodiment shown, and 3 sound generating devices of the same specification as those in Comparative Example 1 as test objects, wherein the sound radiation areas are of equal size. The sound pressure curves of the three are respectively referred to Figure 7 . It can be seen from the 3 sound pressure curves in Figure 7 that the sound generating device 100 of the planar embodiment in the present application improves the sensitivity by about 3 dB @ 4.5 kHz, and the effective frequency range is increased from the original 7 kHz to 8 kHz. The sound generating device 100 of the sunken embodiment in the present application improves the sensitivity by about 5 dB @ 3.7 kHz, and the effective frequency range is increased to 15 kHz.

[0105] The present utility model also provides an electronic device, which includes the above-mentioned sound generating device 100. For the specific structure of the sound generating device 100, reference may be made to the foregoing embodiments. Since this electronic device adopts all the technical solutions of all the foregoing embodiments, it has at least all the beneficial effects brought by the technical solutions of the foregoing embodiments, which will not be elaborated herein one by one.

[0106] In this embodiment, the electronic device may be a vehicle, such as an electric vehicle, etc. The sound generating device 100 is used as a vehicle speaker, which is not limited herein.

[0107] The above are only optional embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present utility model under the concept of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims

1. A sound generating device, characterized in that, The sound generating device includes: a housing having a cavity and a mounting opening communicating with the cavity; a sound generating unit disposed in the cavity, the sound generating unit being provided with a diaphragm corresponding to the mounting opening; and a mesh cover including a top portion and a side portion disposed at an angle, the side portion being connected to the housing, the top portion being opposite to the diaphragm so that the mesh cover covers the mounting opening; wherein air flow holes are formed in both the top portion and the side portion.

2. The sound generating device according to claim 1, wherein The side portion surrounds the periphery of the top portion and encloses a receiving cavity with the top portion. One end of the side portion far from the top portion is connected to the housing, and the air flow holes communicate with the receiving cavity; The air flow holes include first air flow holes formed in the top portion and second air flow holes formed in the side portion.

3. The sound generating device according to claim 2, wherein, The opening area of the second air flow holes is greater than 0.6 times the area of the side portion; and / or, the projected area of the first air flow holes in the horizontal plane is less than 10% of the projected area of the top portion in the horizontal plane; and / or, the second air flow holes are at least one of circular holes, oval holes, strip holes, arc holes, polygon holes, and special-shaped holes; and / or, the first air flow holes are at least one of circular holes, oval holes, strip holes, arc holes, polygon holes, and special-shaped holes; and / or, the aperture or hole gap of the second air flow holes is greater than or equal to the aperture or hole gap of the first air flow holes.

4. The sound generating device according to claim 2, wherein, The side portion includes a first vertical wall, a straight portion, and a second vertical wall. One end of the first vertical wall is connected to the top portion and encloses the receiving cavity with the top portion. The straight portion is disposed on a side of the first vertical wall facing away from the receiving cavity and extends in a direction away from the receiving cavity. One end of the second vertical wall is connected to a side of the straight portion facing away from the top portion and extends toward the housing; The housing is provided with a mounting groove around the mounting opening, and one end of the second vertical wall far from the straight portion is received and limited in the mounting groove.

5. The sound generating device according to claim 2, wherein, The top portion includes a plurality of rib strips intersecting each other. At least some of the rib strips are connected to the side portion, and the first air flow holes are formed between adjacent rib strips.

6. The sound generating device according to claim 5, wherein The plurality of rib strips include a plurality of first rib strips extending linearly in the radial direction and a plurality of second rib strips extending linearly in the circumferential direction. Both ends of the plurality of first rib strips and the plurality of second rib strips are fixedly connected to the side portion. The first air flow holes are formed between adjacent first rib strips and adjacent second rib strips, and the upper and lower ends of the first air flow holes in the vibration direction of the diaphragm are arranged in a staggered manner; or, the plurality of rib strips include a plurality of first rib strips extending in the radial direction and a plurality of second rib strips extending in the circumferential direction. The plurality of second rib strips are arranged at intervals in the radial direction and are connected to the first rib strips. The plurality of first rib strips are arranged in a radial pattern and are connected to the side portion. The first air flow holes are formed between two adjacent second rib strips and adjacent first rib strips, and the first air flow holes are in the shape of an arc-shaped slit.

7. The sound generating device according to any one of claims 1 to 6, characterized in that, The top portion includes a recessed portion and a planar portion connected to the outer side of the recessed portion. The edge of the planar portion away from the recessed portion is connected to the side portion. The recessed portion is recessed toward the side close to the diaphragm to form a recessed groove.

8. The sound generating device according to claim 7, wherein The diaphragm includes a conical diaphragm, a surround portion disposed around the conical diaphragm, and a fixing portion located outside the surround portion. The fixing portion is clamped between the sound generating unit and the side portion. The projection of the surround portion on the top portion is within the range of the planar portion. And / or, the distance between the side of the recessed portion facing the diaphragm and the diaphragm is greater than the maximum amplitude of the diaphragm. And / or, defining the distance between the bottom of the recessed groove and the planar portion as the depth of the recessed groove, the depth of the recessed groove is not greater than the height of the side portion.

9. The sound generating device according to any one of claims 1 to 6, characterized in that The sound generating unit includes: A chassis, the chassis is disposed in the cavity and connected to the housing. A magnetic circuit system, the magnetic circuit system is connected to one end of the chassis away from the mounting opening, and the magnetic circuit system is provided with a magnetic gap. And A vibration system, the vibration system includes the diaphragm and a voice coil connected to the diaphragm. The periphery of the diaphragm is connected to one end of the chassis adjacent to the mounting opening, and is opposite and spaced from the magnetic circuit system. The voice coil is suspended in the magnetic gap.

10. The sound generating device according to claim 9, wherein, The housing includes an upper housing and a lower housing. The upper housing and the lower housing are butt-connected and enclose to form the cavity. The upper housing is provided with the mounting opening. One end of the chassis away from the magnetic circuit system is connected to the upper housing and corresponds to the mounting opening. The chassis and the upper housing are an integrally formed structure.

11. An electronic device, characterized in that, The electronic device includes the sound generating device according to any one of claims 1 to 10.

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