Sound production device and electronic device

Abstract

This utility model discloses a sound-generating device and electronic device, relating to the field of electroacoustic transduction technology. The sound-generating device includes a mounting component, a magnetic circuit system, a vibration system, and a rear cover. The mounting component has a first end and a second end connected together, and a mounting cavity is formed within the mounting component. The magnetic circuit system is disposed within the mounting cavity and has a magnetic gap. The vibration system includes a diaphragm and a voice coil connected to the diaphragm. The periphery of the diaphragm is connected to the first end and is opposite to and spaced from the magnetic circuit system. A first rear cavity communicating with the magnetic gap is formed between the diaphragm and the magnetic circuit system. The end of the voice coil furthest from the diaphragm is suspended within the magnetic gap. The rear cover is connected to the second end and is opposite to and spaced from the magnetic circuit system. A second rear cavity is formed between the rear cover and the magnetic circuit system. A ventilation channel communicating with the first and second rear cavities is formed between the mounting component and the magnetic circuit system. This utility model's sound-generating device effectively reduces the product's F0 (Fever), improves the product's power handling capacity, and enhances acoustic performance.

Description

Technical Field

[0001] This utility model relates to the field of electroacoustic transduction technology, and in particular to a sound-generating device and an electronic device using the sound-generating device. Background Technology

[0002] With the development of electroacoustic transduction technology, sound-generating devices are widely used in people's daily lives. Not only are dedicated audio-visual equipment equipped with sound-generating devices, but they can also be installed in vehicles and buildings for convenient daily use.

[0003] In this field, different types of sound-generating devices can be designed to achieve better acoustic effects for different frequency bands and volumes of sound to be produced. For example, existing large woofers and tweeters in this field can be used in home audio systems, car audio systems, and other products.

[0004] With the improvement of electronic product performance, the improvement of the acoustic performance of sound-generating devices is an inevitable trend. In related technologies, tweeters, due to their acoustic performance requirements, have a smaller overall structure compared to woofers. To meet the requirements of limited assembly space, those skilled in the art have further compacted tweeter designs. This design compresses the rear cavity space of the tweeter, limiting ways to reduce the product's air pressure (F0). Simultaneously, when the tweeter vibrates and produces sound, the air pressure in the rear cavity increases due to vibration, temperature, and other factors. This makes the air in the rear cavity more prone to resonance, thus affecting the tweeter's acoustic performance. Utility Model Content

[0005] The main objective of this invention is to provide a sound-generating device and an electronic device, which aims to provide a sound-generating device that increases the volume of the acoustic cavity and improves the acoustic performance. This sound-generating device effectively reduces the product's F0 and improves the product's power handling capability.

[0006] To achieve the above objectives, this utility model proposes a sound-generating device, the sound-generating device comprising:

[0007] The mounting component has a first end and a second end connected to each other, and a mounting cavity is formed within the mounting component;

[0008] A magnetic circuit system is provided within the mounting cavity, and the magnetic circuit system is provided with a magnetic gap;

[0009] A vibration system comprising a diaphragm and a voice coil connected to the diaphragm, the periphery of the diaphragm being connected to a first end and opposite to and spaced from the magnetic circuit system, a first rear cavity communicating with the magnetic gap being formed between the diaphragm and the magnetic circuit system, and the end of the voice coil furthest from the diaphragm being suspended within the magnetic gap; and

[0010] A rear cover is connected to the second end and is opposite to and spaced from the magnetic circuit system, forming a second rear cavity between the rear cover and the magnetic circuit system;

[0011] The mounting component and the magnetic circuit system form a ventilation channel connecting the first rear cavity and the second rear cavity.

[0012] In one embodiment, the rear cover is further provided with a vent hole communicating with the second rear cavity;

[0013] And / or, the sound-generating device further includes a sound-absorbing material disposed in the second rear cavity.

[0014] In one embodiment, the inner wall of the mounting cavity is provided with a first locking platform, and the periphery of the magnetic circuit system is provided with a second locking platform. The second locking platform is supported and locked onto the first locking platform, and the outer wall of the magnetic circuit system is spaced apart from the inner wall of the mounting cavity to form the ventilation channel.

[0015] In one embodiment, the first card holder includes a plurality of first card holders, which are spaced apart along the periphery of the mounting member;

[0016] And / or, the second card station is a ring structure arranged along the periphery of the magnetic circuit system; or, the second card station includes multiple second card stations, which are spaced apart along the periphery of the magnetic circuit system, and the second card station corresponds to the first card station one by one.

[0017] In one embodiment, the inner wall of the mounting cavity adjacent to the first end protrudes into the mounting cavity to form a positioning platform, and the end of the magnetic circuit system facing the diaphragm is limited and abutted against the positioning platform, so that the magnetic circuit system is limited between the positioning platform and the first card plate.

[0018] In one embodiment, the positioning stage includes a plurality of positioning stages, which are spaced apart along the periphery of the first end;

[0019] And / or, the inner wall of the mounting cavity is further provided with a plurality of positioning protrusions, the plurality of positioning protrusions being spaced apart along the periphery of the mounting component and respectively abutting against the outer periphery of the magnetic circuit system, so as to form a ventilation channel between two adjacent positioning protrusions.

[0020] In one embodiment, the first end extends toward the mounting cavity to form a support platform, and the periphery of the diaphragm is supported and connected to the support platform;

[0021] The magnetic circuit system has one end facing the diaphragm spaced apart from the support platform to form a ventilation gap connecting the first rear cavity and the ventilation channel.

[0022] In one embodiment, the support platform is inclined on the side facing the magnetic circuit system;

[0023] And / or, the support platform is provided with a recessed groove for the lead wire of the voice coil to pass through.

[0024] In one embodiment, the second end protrudes towards the mounting cavity to form a third retaining platform, and the periphery of the rear cover forms a fourth retaining platform. The fourth retaining platform is supported and engaged with the third retaining platform so that the rear cover is connected to the second end.

[0025] In one embodiment, the rear cover has a sound-guiding protrusion on the side facing the magnetic circuit system, and the sound-guiding protrusion protrudes toward the side closer to the magnetic circuit system.

[0026] In one embodiment, the side surface of the acoustic protrusion is an inclined arc-shaped surface;

[0027] And / or, the sound-guiding protrusion has an arc-shaped top surface;

[0028] And / or, the side of the rear cover facing the magnetic circuit system is provided with a plurality of support protrusions, which are spaced apart; wherein, the plurality of support protrusions are arranged radially around the sound-guiding protrusion; and / or, the side of the rear cover facing the magnetic circuit system is provided with a support ring surrounding the sound-guiding protrusion, one end of each support protrusion is connected to the side of the support ring opposite to the sound-guiding protrusion, and extends toward the periphery of the rear cover.

[0029] In one embodiment, the magnetic circuit system includes a U-shaped iron and a central magnet. The U-shaped iron is disposed within the mounting cavity, and the ventilation channel is formed between the outer wall of the U-shaped iron and the inner wall of the mounting cavity. The U-shaped iron is provided with a receiving groove, and the central magnet is disposed within the receiving groove and spaced apart from the side wall of the receiving groove to form the magnetic gap. The central magnet includes a central magnet and a central washer stacked together, and the central magnet is connected to the bottom wall of the receiving groove.

[0030] And / or, the voice coil includes a skeleton and a voice coil wire wound around the skeleton, the skeleton is cylindrical, one end of the skeleton is connected to the diaphragm, and the skeleton is provided with a through hole;

[0031] And / or, the diaphragm includes a dome, a folded ring portion surrounding the dome, and a fixing portion connected to the outside of the folded ring portion, the fixing portion being supported and connected to the first end; wherein, the dome protrudes in a direction away from the magnetic circuit system;

[0032] And / or, the sound-generating device further includes a front cover, which is disposed on the side of the diaphragm facing away from the magnetic circuit system and connected to the mounting member; wherein, the front cover is provided with a conductive element, and the lead wire of the voice coil is connected to the conductive element; and / or, the periphery of the front cover extends toward the outer wall of the mounting member to form a snap-fit ​​platform, and the outer wall of the mounting member is provided with a snap-fit ​​ring platform that snaps into the snap-fit ​​platform.

[0033] This utility model also proposes an electronic device, which includes the sound-generating device described above.

[0034] The sound-generating device of this utility model places the magnetic circuit system inside the mounting cavity of the mounting component, and connects the diaphragm and the rear cover of the vibration system to the first and second ends of the mounting component, respectively. This creates a first rear cavity with a magnetic gap between the diaphragm and the magnetic circuit system, and a second rear cavity between the rear cover and the magnetic circuit system. By forming a ventilation channel between the mounting component and the magnetic circuit system that connects the first and second rear cavities, the sound cavity volume of the sound-generating device can be effectively increased by utilizing the first rear cavity in conjunction with the ventilation channel and the second rear cavity. This effectively reduces the product's F0, improves the product's power handling capacity, and enhances the acoustic performance of the sound-generating device. At the same time, by directly connecting the rear cover to the second end of the mounting component, the vibration system, magnetic circuit system, and rear cover are arranged sequentially along the vibration direction of the diaphragm, thus avoiding the need to install the sound-generating device in an additional enclosure to increase the sound cavity volume while simultaneously increasing the overall product size. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0036] Figure 1 A schematic diagram of the structure of an embodiment of the sound-generating device provided by this utility model;

[0037] Figure 2 A schematic diagram of the structure of an embodiment of the sound-generating device provided by this utility model from another perspective;

[0038] Figure 3 An exploded view of an embodiment of the sound-generating device provided by this utility model;

[0039] Figure 4 A cross-sectional schematic diagram of an embodiment of the sound-generating device provided by this utility model;

[0040] Figure 5 A cross-sectional view of the sound-generating device provided by this utility model with the front cover removed;

[0041] Figure 6 A top view of the sound-generating device provided by this utility model, with the front cover and vibration system removed;

[0042] Figure 7 A schematic diagram of the structure of an embodiment of the mounting component provided by this utility model;

[0043] Figure 8 A schematic diagram of the structure of an embodiment of the mounting component provided by this utility model from another perspective;

[0044] Figure 9 A schematic diagram of the structure of an embodiment of the back cover provided by this utility model;

[0045] Figure 10 A schematic diagram of the structure of another embodiment of the back cover provided by this utility model;

[0046] Figure 11 A schematic diagram of the structure of an embodiment of the front cover provided by this utility model;

[0047] Figure 12 The impedance performance curves of the sound-generating device of this utility model and the prior art are shown.

[0048] Figure 13 The diagram shows the frequency response performance of the sound-generating device of this invention compared to existing technologies.

[0049] Explanation of icon numbers:

[0050] 100. Sound-generating device; 1. Mounting component; 11. First end; 111. Support platform; 112. Ventilation gap; 113. Recessed groove; 12. Second end; 121. Third locking platform; 13. Mounting cavity; 131. Ventilation channel; 132. First locking platform; 133. Positioning platform; 134. Positioning protrusion; 135. Locking ring platform; 2. Magnetic circuit system; 21. Magnetic gap; 22. U-shaped iron; 221. Second locking platform; 222. Receiving groove; 23. Central magnetic part; 231. 232. Center magnet; 3. Center washer; 3. Vibration system; 31. Diaphragm; 311. Dome; 312. Surround section; 313. Fixing section; 32. Voice coil; 321. Frame; 322. Voice coil wire; 323. Through hole; 33. First rear cavity; 4. Rear cover; 41. Second rear cavity; 42. Vent hole; 44. Fourth mounting plate; 45. Sound guiding protrusion; 46. Support protrusion; 47. Support ring; 5. Sound absorbing material; 7. Front cover; 71. Conductive component; 72. Mounting plate.

[0051] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0052] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0053] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0054] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0055] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0056] With the development of electroacoustic transduction technology, sound-generating devices are widely used in people's daily lives. Not only are dedicated audio-visual equipment equipped with sound-generating devices, but they can also be installed in vehicles and buildings for convenient daily use. Simultaneously, with the rapid development of consumer electronics, electronic devices such as headphones, smartphones, and VR devices have gained consumer acceptance and widespread application. Those skilled in the art have also made corresponding improvements to related supporting products, such as headphones, to meet the performance requirements of electronic products and satisfy consumers' needs for product performance. Sound-generating devices are important electroacoustic transduction components in consumer electronics, and they are widely used as speakers, earpieces, and headphones.

[0057] In this field, different types of sound-generating devices can be designed to achieve better acoustic effects for different frequency bands and volumes of sound to be produced. For example, existing large woofers and tweeters in this field can be used in home audio systems, car audio systems, and other products.

[0058] With the improvement of electronic product performance, the improvement of the acoustic performance of sound-generating devices is an inevitable trend. In related technologies, to improve the performance of sound-generating devices, product designs are becoming increasingly extreme, with higher space utilization rates, resulting in poorer overall performance and effect. Due to their inherent acoustic performance requirements, tweeters have a smaller overall structure compared to woofers. To meet the requirements of limited assembly space, those skilled in the art have further compacted tweeter designs. This design compresses the rear cavity space of the tweeter, limiting methods for reducing the F0 (fiber oscillation). Besides reducing the F0 of the diaphragm itself, it is usually necessary to place the sound-generating device in an additional enclosure or use the Helmholtz resonance principle to achieve the goal of reducing F0. However, the installation environment of tweeters in vehicle bodies is limited, and adding an additional enclosure structure results in a larger product size, hindering flexible placement. Furthermore, when the tweeter vibrates and produces sound, the air pressure in the rear cavity increases due to vibration, temperature, and other factors. This makes the air in the rear cavity more prone to resonance, thus affecting the tweeter's acoustic performance.

[0059] Based on the above concept and problems, this utility model proposes a sound-generating device 100. It is understood that the sound-generating device 100 is applied to electronic devices, which may be mobile phones, headphones, smart wearable devices, vehicles, etc., and are not limited thereto.

[0060] Please refer to the reference. Figures 1 to 10 As shown in the embodiment of this utility model, the sound-generating device 100 includes a mounting component 1, a magnetic circuit system 2, a vibration system 3, and a rear cover 4. The mounting component 1 has a first end 11 and a second end 12 connected to each other. A mounting cavity 13 is formed inside the mounting component 1. The magnetic circuit system 2 is disposed in the mounting cavity 13 and has a magnetic gap 21. The vibration system 3 includes a diaphragm 31 and a voice coil 32 connected to the diaphragm 31. The periphery of the diaphragm 31 is connected to the first end 11 and is opposite to and spaced from the magnetic circuit system 2. A first rear cavity 33 is formed between the diaphragm 31 and the magnetic circuit system 2, communicating with the magnetic gap 21. The end of the voice coil 32 away from the diaphragm 31 is suspended in the magnetic gap 21. The rear cover 4 is connected to the second end 12 and is opposite to and spaced from the magnetic circuit system 2. A second rear cavity 41 is formed between the rear cover 4 and the magnetic circuit system 2. A ventilation channel 131 is formed between the mounting component 1 and the magnetic circuit system 2, communicating with the first rear cavity 33 and the second rear cavity 41.

[0061] In this embodiment, the sound-generating device 100 can be a single sound-generating unit of a loudspeaker, and the loudspeaker can be a miniature loudspeaker. It is understood that... Figures 1 to 8As shown, the mounting component 1 of the sound-generating device 100 can be a frame, a housing, or other structures used to install, fix, support, and protect the magnetic circuit system 2 and the vibration system 3. In other words, the magnetic circuit system 2 and the vibration system 3 are integrated into one unit, so that the sound-generating device 100 can be used as a whole component in electronic equipment. No limitation is made here.

[0062] Understandably, the mounting member 1 serves to support, hold, and fix the various components of the sound-generating device 100. Optionally, the mounting member 1 has a cylindrical structure with openings at both ends. That is, the mounting member 1 has a first end 11 and a second end 12 connected to each other, and a mounting cavity 13 is formed inside the mounting member 1.

[0063] Optionally, the outer contour of the sound-generating device 100 can be circular or square, so that the outer contours of the mounting component 1, the magnetic circuit system 2, and the vibration system 3 are correspondingly set to circular or square, depending on actual needs, and are not limited here. In this embodiment, the mounting component 1 can be a basket, a frame, or a frame structure, that is, the mounting component 1 has a mounting cavity 13 with openings at both ends. The mounting component 1 can be a single integral structure or multiple separate structures combined together, and is not limited here.

[0064] In this embodiment, by placing the magnetic circuit system 2 inside the mounting cavity 13 of the mounting member 1, and placing the diaphragm 31 and the rear cover 4 of the vibration system 3 on the first end 11 and the second end 12 of the mounting member 1 respectively, the openings of the first end 11 and the second end 12 of the mounting member 1 are sealed by the diaphragm 31 and the rear cover 4, and the diaphragm 31 and the rear cover 4 are located on opposite sides of the magnetic circuit system 2, so as to form a first rear cavity 33 with a communicating magnetic gap 21 between the diaphragm 31 and the magnetic circuit system 2, and a second rear cavity 41 is formed between the rear cover 4 and the magnetic circuit system 2.

[0065] In this embodiment, by forming a ventilation channel 131 between the mounting component 1 and the magnetic circuit system 2, which connects the first rear cavity 33 and the second rear cavity 41, the acoustic cavity volume of the sound-generating device 100 is effectively increased by utilizing the first rear cavity 33 in conjunction with the ventilation channel 131 and the second rear cavity 41, thereby effectively reducing the product F0, improving the product power resistance, and improving the acoustic performance of the sound-generating device 100.

[0066] It should be noted that the magnetic circuit system 2 can be configured as a magnetic yoke and a central magnetic part and a side magnetic part disposed on the magnetic yoke. The side magnetic part is located outside the central magnetic part and is spaced apart from the central magnetic part to form a magnetic gap 21. Of course, the magnetic circuit system 2 can also be configured as a structure of T-iron combined with a ring magnetic circuit or U-iron combined with a central magnetic part, which is not limited here.

[0067] In this embodiment, the periphery of the diaphragm 31 of the vibration system 3 is connected to the first end 11 and is opposite to and spaced from the magnetic circuit system 2. The voice coil 32 is located in the first rear cavity 33, and one end of the voice coil 32 is connected to the diaphragm 31. The other end of the voice coil 32 is suspended in the magnetic gap 21 of the magnetic circuit system 2. When current is passed through the voice coil 32, the voice coil 32 drives the diaphragm 31 to vibrate and produce sound in the magnetic field formed by the magnetic circuit system 2.

[0068] Understandably, by directly connecting the back cover 4 to the second end 12 of the mounting component 1, the vibration system 3, the magnetic circuit system 2 and the back cover 4 are arranged sequentially along the vibration direction of the diaphragm 31. That is, there is no need to set up an additional box structure in order to increase the volume of the acoustic cavity, and the sound generating device 100 is installed in the box structure as a whole, thereby avoiding increasing the overall volume of the product.

[0069] The sound-generating device 100 of this utility model places the magnetic circuit system 2 inside the mounting cavity 13 of the mounting member 1, and connects the diaphragm 31 of the vibration system 3 and the rear cover 4 to the first end 11 and the second end 12 of the mounting member 1 respectively, so that a first rear cavity 33 with a communicating magnetic gap 21 is formed between the diaphragm 31 and the magnetic circuit system 2, and a second rear cavity 41 is formed between the rear cover 4 and the magnetic circuit system 2. By forming a ventilation channel 131 between the mounting member 1 and the magnetic circuit system 2 connecting the first rear cavity 33 and the second rear cavity 41, the sound-generating device 100 of this utility model can achieve the following: By utilizing the first rear cavity 33 in conjunction with the ventilation channel 131 and the second rear cavity 41, the acoustic cavity volume of the sound-generating device 100 is effectively increased, thereby effectively reducing the product F0, improving the product's power resistance, and enhancing the acoustic performance of the sound-generating device 100. At the same time, by directly connecting the rear cover 4 to the second end 12 of the mounting component 1, the vibration system 3, the magnetic circuit system 2, and the rear cover 4 are arranged sequentially along the vibration direction of the diaphragm 31, thus avoiding the need to install the sound-generating device 100 in an additional enclosure to increase the acoustic cavity volume while simultaneously increasing the overall product volume.

[0070] In one embodiment, the rear cover 4 is further provided with a vent 42 communicating with the second rear cavity 41. It is understood that, as Figure 2 , Figure 3 , Figure 9 and Figure 10 As shown, by providing a vent hole 42 on the rear cover 4, air can be released through the vent hole 42 to balance the air pressure on opposite sides of the diaphragm 31 of the sound-generating device 100.

[0071] In one embodiment, the sound-generating device 100 further includes a sound-absorbing material 5 disposed in the second rear cavity 41.

[0072] In this embodiment, as Figures 3 to 5As shown, by placing sound-absorbing material 5 in the second rear cavity 41, the sound-absorbing material 5 absorbs noise from the rear of the diaphragm 31, absorbs vibrations, and absorbs air molecules, thereby ensuring the sound quality of the sound-generating device 100. Optionally, the sound-absorbing material 5 is sound-absorbing cotton.

[0073] Understandably, since the ventilation channel 131 connects the first rear cavity 33 and the second rear cavity 41, the sound-absorbing material 5 can effectively absorb the vibration inside the sound-generating device 100, reducing the risk of resonance. When the air pressure inside the sound-generating device 100 increases, the sound-absorbing material 5 can also absorb air molecules to a certain extent, effectively increasing the volume of the sound cavity and thus alleviating the problem of increased air pressure.

[0074] In one embodiment, the inner wall of the mounting cavity 13 is provided with a first mounting platform 132, and the periphery of the magnetic circuit system 2 is provided with a second mounting platform 221. The second mounting platform 221 is supported and engaged with the first mounting platform 132, and the outer wall of the magnetic circuit system 2 is spaced apart from the inner wall of the mounting cavity 13 to form a ventilation channel 131.

[0075] In this embodiment, as Figures 3 to 5 , Figure 7 and Figure 8 As shown, by providing a first mounting plate 132 on the inner wall of the mounting cavity 13 of the mounting component 1 and a second mounting plate 221 on the outer wall of the magnetic circuit system 2, the magnetic circuit system 2 is supported and engaged with the first mounting plate 132 by the second mounting plate 221, so as to be installed in the mounting cavity 13. It also facilitates the formation of a ventilation channel 131 by spacing between the outer wall of the magnetic circuit system 2 and the inner wall of the mounting cavity 13.

[0076] Optionally, a plurality of first card stands 132 are provided, and the plurality of first card stands 132 are spaced apart along the periphery of the mounting member 1. It is understood that the plurality of first card stands 132 are spaced apart and arranged around the outer wall of the magnetic circuit system 2.

[0077] In this embodiment, as Figure 3 As shown, the second card holder 221 can be an annular structure arranged along the periphery of the magnetic circuit system 2. Of course, in other embodiments, there may be multiple second card holders 221, spaced apart along the periphery of the magnetic circuit system 2. Optionally, the second card holders 221 correspond one-to-one with the first card holders 132.

[0078] It should be noted that, in order to ensure the smooth flow of the ventilation channel 131, a groove can also be provided on the outer wall of the magnetic circuit system 2, such that the groove extends along the vibration direction of the diaphragm 31 from one end of the magnetic circuit system 2 facing the first rear cavity 33 to the other end of the magnetic circuit system 2 facing the second rear cavity 41, which is not limited here. Of course, a groove or protrusion can also be provided on the inner wall of the mounting cavity 13 of the mounting component 1 to facilitate the formation of the ventilation channel 131 by spacing between the outer wall of the magnetic circuit system 2 and the inner wall of the mounting cavity 13, which is not limited here.

[0079] To further improve the installation stability of the magnetic circuit system 2, in one embodiment, the inner wall of the mounting cavity 13 adjacent to the first end 11 protrudes into the mounting cavity 13 to form a positioning platform 133. The end of the magnetic circuit system 2 facing the diaphragm 31 is limited and abutted against the positioning platform 133, so that the magnetic circuit system 2 is limited between the positioning platform 133 and the first carding platform 132.

[0080] In this embodiment, as Figures 3 to 8 As shown, the inner wall of the mounting cavity 13 of the mounting component 1 is provided with a positioning platform 133, which makes the positioning platform 133 abut against the end of the magnetic circuit system 2 facing the diaphragm 31. The first locking platform 132 locks into the second locking platform 221 that supports the magnetic circuit system 2, thus limiting the magnetic circuit system 2 between the positioning platform 133 and the first locking platform 132, thereby further improving the connection stability between the magnetic circuit system 2 and the mounting component 1.

[0081] Optionally, the positioning stage 133 includes a plurality of stages, which are spaced apart along the periphery of the first end 11. Understandably, this arrangement ensures that the outer wall of the magnetic circuit system 2 is spaced apart from the inner wall of the mounting cavity 13 to form a ventilation channel 131.

[0082] To further ensure the smooth ventilation of the ventilation channel 131 formed by the gap between the outer wall of the magnetic circuit system 2 and the inner wall of the mounting cavity 13, in one embodiment, the inner wall of the mounting cavity 13 is further provided with a plurality of positioning protrusions 134. The plurality of positioning protrusions 134 are spaced apart along the periphery of the mounting member 1 and respectively abut against the outer periphery of the magnetic circuit system 2 to form a ventilation channel 131 between two adjacent positioning protrusions 134.

[0083] In this embodiment, as Figure 3 , Figure 7 and Figure 8 As shown, multiple positioning protrusions 134 all abut against the outer periphery of the magnetic circuit system 2, that is, they limit the magnetic circuit system 2 in the peripheral direction. The cooperation of the positioning platform 133 and the first card platform 132 limits the magnetic circuit system 2 in the vibration direction of the diaphragm 31, which can effectively improve the installation stability of the magnetic circuit system 2.

[0084] Optionally, the positioning protrusions 134 and the positioning platform 133 are arranged in a one-to-one correspondence along the vibration direction of the diaphragm 31. In this embodiment, the positioning platform 133 and the first card platform 132 are staggered along the vibration direction of the diaphragm 31, that is, the positioning platform 133 is adjacent to the first end 11, and the first card platform 132 is adjacent to the second end 12. Optionally, the positioning protrusions 134 and the first card platform 132 are alternately arranged along the periphery of the magnetic circuit system 2, which is not limited here.

[0085] In one embodiment, the first end 11 extends toward the mounting cavity 13 to form a support platform 111, and the periphery of the diaphragm 31 is supported and connected to the support platform 111; wherein, the end of the magnetic circuit system 2 facing the diaphragm 31 is spaced apart from the support platform 111 to form a ventilation gap 112 connecting the first rear cavity 33 and the ventilation channel 131.

[0086] In this embodiment, as Figures 3 to 7 As shown, by increasing the end face of the first end 11, the connection area between the end face of the first end 11 and the periphery of the diaphragm 31 is increased, thereby improving connection stability and sealing. It is understood that the magnetic circuit system 2 is located below the support platform 111, such that the end of the magnetic circuit system 2 facing the diaphragm 31 is spaced from the support platform 111 to form a ventilation gap 112 connecting the first rear cavity 33 and the ventilation channel 131, thus ensuring that the first rear cavity 33 is connected to the second rear cavity 41 through the ventilation gap 112 and the ventilation channel 131.

[0087] Understandably, the positioning platform 133 can be formed by extending the inner side of the support platform 111 toward the center of the mounting cavity 13, and this is not limited here. To further ensure the ventilation size of the ventilation gap 112, the support platform 111 may optionally be inclined on the side facing the magnetic circuit system 2.

[0088] In one embodiment, the support platform 111 is provided with a recessed groove 113 for the lead wire of the voice coil 32 to pass through. It is understood that... Figure 3 , Figure 6 and Figure 7 As shown, by providing a recessed groove 113 on the end face of the first end 11 of the mounting part 1, the recessed groove 113 can be used to provide a wire passage for the lead wire of the voice coil 32, thereby realizing the connection and conduction between the voice coil 32 and the external circuit.

[0089] In one embodiment, the second end 12 protrudes into the mounting cavity 13 to form a third mounting platform 121, and the periphery of the rear cover 4 forms a fourth mounting platform 44. The fourth mounting platform 44 is supported and engaged with the third mounting platform 121 so that the rear cover 4 is connected to the second end 12.

[0090] In this embodiment, as Figures 2 to 5 , Figure 7 and Figure 8As shown, by setting a third locking platform 121 at the second end 12 of the mounting component 1 and forming a fourth locking platform 44 at the edge of the rear cover 4, the rear cover 4 is supported and locked to the third locking platform 121 by the fourth locking platform 44 and installed at the second end 12 of the mounting component 1, thereby simplifying the structure and improving the ease of installation.

[0091] Optionally, the third card holder 121 has a ring structure, that is, the third card holder 121 is arranged in a ring along the periphery of the second end 12. Optionally, the fourth card holder 44 has a ring structure, that is, the fourth card holder 44 is arranged in a ring along the periphery of the rear cover 4, which is not limited here.

[0092] It is understandable that the mounting component 1 and the back cover 4 can be fixedly connected or integrally molded, such as by welding, bonding, or injection molding, etc., without limitation. Of course, the mounting component 1 and the back cover 4 can also be separate components, such as by snap-fit ​​connection, plug-in fit, screw connection, or pin connection, etc., without limitation.

[0093] In one embodiment, the rear cover 4 has a sound-guiding protrusion 45 on the side facing the magnetic circuit system 2, and the sound-guiding protrusion 45 protrudes toward the side closer to the magnetic circuit system 2.

[0094] In this embodiment, as Figures 3 to 5 , Figure 9 As shown, the rear cover 4 has a receiving groove, and a sound-guiding protrusion 45 is formed on the bottom surface of the receiving groove of the rear cover 4, such that the sound-guiding protrusion 45 protrudes upward from the bottom surface of the rear cover 4. Optionally, sound-absorbing material 5 can be disposed around the sound-guiding protrusion 45.

[0095] Understandably, the sound-guiding protrusion 45 can guide the airflow inside the sound-generating device 100. When the diaphragm 31 vibrates, causing airflow and pressure changes, the sound-guiding protrusion 45 extends along the vibration direction of the diaphragm 31. Therefore, it can guide and divert the airflow within the second rear cavity 41, directing the air and vibrations towards the sound-absorbing material 5 surrounding the sound-guiding protrusion 45. The air and vibrations, guided by the sound-guiding protrusion 45, can be efficiently absorbed by the sound-absorbing material 5, thereby reducing the overall resonant frequency of the sound-generating device 100, preventing acoustic problems such as resonance, and exhibiting better high-frequency vibration performance.

[0096] Optionally, such as Figures 3 to 5 , Figure 9 As shown, the sidewall of the sound-guiding protrusion 45 can be an arc surface. That is, the side surface of the sound-guiding protrusion 45 is an inclined arc-shaped surface. The sound-guiding protrusion 45 as a whole has an arc-shaped protrusion structure that gradually tapers from bottom to top along the axial section. The arc-shaped surface can better guide the airflow.

[0097] Optionally, such as Figures 3 to 5 , Figure 9 As shown, the sound-guiding protrusion 45 has an arc-shaped top surface. Both the arc-shaped top surface and the arc-shaped side surface can guide airflow and air vibration. Compared with the flat upper surface of the sound-guiding protrusion 45, the arc-shaped top surface can more smoothly guide the airflow to the surrounding sound-absorbing material 5, reducing the obstruction and rebound effect on the airflow.

[0098] Optionally, the extension length of the sound-guiding protrusion 45 along the vibration direction of the diaphragm 31 is less than the distance between the bottom surface of the rear cover 4 and the bottom surface of the magnetic circuit system 2.

[0099] In one embodiment, the side of the rear cover 4 facing the magnetic circuit system 2 is provided with a plurality of support protrusions 46, which are spaced apart; wherein, the plurality of support protrusions 46 are arranged radially around the sound-conducting protrusion 45; and / or, the side of the rear cover 4 facing the magnetic circuit system 2 is provided with a support ring 47 surrounding the sound-conducting protrusion 45, one end of each support protrusion 46 is connected to the side of the support ring 47 opposite to the sound-conducting protrusion 45, and extends toward the periphery of the rear cover 4.

[0100] In this embodiment, as Figure 3 and Figure 9 As shown, by setting the support protrusion 46, on the one hand, the support protrusion 46 supports the sound-absorbing material 5, and on the other hand, the support protrusion 46 guides the airflow in the second rear cavity 41.

[0101] Understandably, multiple support protrusions 46 are spaced apart. Optionally, the multiple support protrusions 46 are arranged radially around the sound-guiding protrusion 45. This arrangement facilitates the guidance of airflow through the ventilation channel 131 around the periphery of the magnetic circuit system 2 to the center of the rear cover 4 via the support protrusions 46, and also facilitates the guidance of airflow to the surrounding sound-absorbing material 5.

[0102] In this embodiment, by providing a support ring 47, one end of a plurality of support protrusions 46 is connected to one side of the support ring 47 opposite to the acoustic protrusion 45, and extends toward the periphery of the rear cover 4. Optionally, the extension length of the support ring 47 and the support protrusions 46 along the vibration direction of the diaphragm 31 is less than the distance between the bottom surface of the rear cover 4 and the bottom surface of the magnetic circuit system 2.

[0103] Understandably, this ensures that the second rear cavity 41 formed between the rear cover 4 and the magnetic circuit system 2 is part of the acoustic cavity of the sound-generating device 100, so that the sound-guiding protrusion 45, the support ring 47, and the support protrusion 46 can minimize their obstructive effect while still being able to guide airflow. This improves the actual effective space of the acoustic cavity in the sound-generating device 100 and maximizes the sound absorption effect of the sound-absorbing material 5.

[0104] Optionally, the height of the sound-guiding protrusion 45, the support ring 47, and the support protrusion 46 is lower than the depth of the receiving groove of the rear cover 4. The sound-guiding protrusion 45, the support ring 47, and the support protrusion 46 all protrude upwards from the bottom surface of the receiving groove of the rear cover 4, and are entirely located within the rear cover 4, with their tops lower than the upper edge of the rear cover 4. This implementation reduces the possibility of the sound-guiding protrusion 45, the support ring 47, and the support protrusion 46 blocking the second rear cavity 41. If the height of the sound-guiding protrusion 45, the support ring 47, and the support protrusion 46 is too high, protruding upwards and abutting against the bottom surface of the magnetic circuit system 2, it may prevent the smooth flow of air within the second rear cavity 41, thus reducing the pressure relief capacity of the acoustic cavity.

[0105] In one embodiment, the magnetic circuit system 2 includes a U-shaped iron 22 and a central magnetic part 23. The U-shaped iron 22 is disposed in the mounting cavity 13, and a ventilation channel 131 is formed between the outer wall of the U-shaped iron 22 and the inner wall of the mounting cavity 13. The U-shaped iron 22 is provided with a receiving groove 222. The central magnetic part 23 is disposed in the receiving groove 222 and is spaced apart from the side wall of the receiving groove 222 to form a magnetic gap 21. The central magnetic part 23 includes a central magnet 231 and a central washer 232 stacked together. The central magnet 231 is connected to the bottom wall of the receiving groove 222.

[0106] In this embodiment, as Figures 3 to 6 As shown, the U-shaped iron 22 of the magnetic circuit system 2 has a U-shaped basin structure. A receiving groove 222 is formed inside the U-shaped iron 22. By stacking the central magnet 231 and the central washer 232 of the central magnetic part 23 in the receiving groove 222, the periphery of the central magnet 231 and the central washer 232 is spaced from the side wall of the U-shaped iron 22 (that is, the side wall of the receiving groove 222), so that a magnetic gap 21 is formed between the central magnetic part 23 and the side wall of the U-shaped iron 22.

[0107] Optionally, the external contours of the mounting component 1, the magnetic circuit system 2, and the vibration system 3 are all circular. Understandably, the receiving groove 222 of the U-shaped iron 22 is a cylindrical cavity, and the central magnet 231 and the central washer 232 of the central magnetic part 23 are both circular plate structures, which are not limited here. Optionally, the central washer 232 is a magnetically conductive plate structure.

[0108] In one implementation, such as Figures 3 to 5 As shown, the voice coil 32 includes a frame 321 and a voice coil wire 322 wound around the frame 321. The frame 321 is cylindrical, with one end connected to the diaphragm 31. The frame 321 has a through hole 323. It can be understood that by winding the voice coil wire 322 around the inner and / or outer wall of the frame 321, the frame 321 places the voice coil wire 322 within the magnetic gap 21, ensuring it is always within the magnetic field formed by the magnetic circuit system 2, thus guaranteeing the driving force on the voice coil 32.

[0109] Understandably, by providing a through-hole 323 at one end of the frame 321 adjacent to the diaphragm 31, the air pressure balance inside and outside the voice coil 32 can be ensured. Optionally, the frame 321 is cylindrical.

[0110] In one implementation, such as Figure 1 , Figures 3 to 5 As shown, the diaphragm 31 includes a dome 311, a folded ring portion 312 surrounding the dome 311, and a fixing portion 313 connected to the outside of the folded ring portion 312. The fixing portion 313 is supported and connected to the first end 11. The dome 311 protrudes in a direction away from the magnetic circuit system 2.

[0111] Understandably, the surround portion 312 of the diaphragm 31 protrudes in a direction away from the magnetic circuit system 2. Optionally, the dome 311 of the diaphragm 31 protrudes in a direction away from the magnetic circuit system 2. In this embodiment, the connection between the dome 311 and the surround portion 312 of the diaphragm 31 is connected to one end of the voice coil 32. Optionally, the dome 311, the surround portion 312, and the fixing portion 313 of the diaphragm 31 are integrally formed, which ensures the structural strength and sealing of the diaphragm 31.

[0112] In one embodiment, the sound-generating device 100 further includes a front cover 7, which is disposed on the side of the diaphragm 31 facing away from the magnetic circuit system 2 and connected to the mounting member 1; wherein, the front cover 7 is provided with a conductive element 71, and the lead wire of the voice coil 32 is connected to the conductive element 71; and / or, the periphery of the front cover 7 extends toward the outer wall of the mounting member 1 to form a snap-fit ​​platform 72, and the outer wall of the mounting member 1 is provided with a snap-fit ​​ring platform 135 that snaps into the snap-fit ​​platform 72.

[0113] In this embodiment, as Figures 1 to 4 As shown, the front cover 7 has a through hole for the sound wave radiation of the diaphragm 31. By providing the front cover 7, the diaphragm 31 is protected, preventing damage caused by collisions during installation. Understandably, to facilitate the connection between the voice coil 32 and external circuitry, a conductive element 71 is provided on the front cover 7. This allows the lead wire of the voice coil 32 to pass through the recessed groove 113 and connect to the conductive element 71. The conductive element 71 connects to the external circuitry via lines, cables, or flexible circuit boards, etc., which are not limited here.

[0114] Understandably, in order to improve the connection stability between the front cover 7 and the mounting part 1, the front cover 7 is provided with a snap-fit ​​platform 72, and the outer wall of the mounting part 1 is provided with a snap-fit ​​ring platform 135. In this way, the snap-fit ​​ring platform 135 is snapped onto the snap-fit ​​platform 72, thereby fixing the front cover 7 and the mounting part 1.

[0115] The sound-generating device 100 of this utility model changes the design of the mounting component 1 from a closed design to a through-hole design, so that a ventilation channel 131 is formed between the mounting component 1 and the outer wall of the magnetic circuit system 2. This allows the first rear cavity 33 formed by the diaphragm 31 facing the magnetic circuit system 2 and the magnetic circuit system 2 to communicate with the second rear cavity 41 increased by the rear cover 4 through the ventilation channel 131. This can effectively increase the volume of the sound cavity of the sound-generating device 100. The sound-absorbing material 5 is placed in the second rear cavity 41 to absorb the air, thereby expanding the rear cavity and reducing the product F0. It also expands the frequency range to a certain extent.

[0116] Understandable, such as Figure 12 and Figure 13 As shown, the sound-generating device 100 effectively reduces the product F0 and improves the product power resistance without adding an extra enclosure structure. Compared with the prior art, the sound-generating device 100 of this utility model has a product F0 of 1080Hz, while the product F0 of the prior art is 1335Hz. The product F0 is significantly reduced, and the frequency response curve has a wider bandwidth.

[0117] This utility model also proposes an electronic device, which includes the aforementioned sound-generating device 100. The specific structure of the sound-generating device 100 is as described in 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 about by the technical solutions of the foregoing embodiments, which will not be described in detail here.

[0118] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A sound producing device, characterized by, The sound-generating device includes: The mounting component has a first end and a second end connected to each other, and a mounting cavity is formed within the mounting component; A magnetic circuit system is provided within the mounting cavity, and the magnetic circuit system is provided with a magnetic gap; A vibration system comprising a diaphragm and a voice coil connected to the diaphragm, the periphery of the diaphragm being connected to a first end and opposite to and spaced from the magnetic circuit system, a first rear cavity communicating with the magnetic gap being formed between the diaphragm and the magnetic circuit system, and the end of the voice coil furthest from the diaphragm being suspended within the magnetic gap; and A rear cover is connected to the second end and is opposite to and spaced from the magnetic circuit system, forming a second rear cavity between the rear cover and the magnetic circuit system; The mounting component and the magnetic circuit system form a ventilation channel connecting the first rear cavity and the second rear cavity.

2. The sound production device of claim 1, wherein The rear cover is also provided with a vent hole that connects to the second rear cavity; And / or, the sound-generating device further includes a sound-absorbing material disposed in the second rear cavity.

3. The sound production device of claim 1, wherein The inner wall of the mounting cavity is provided with a first locking platform, and the periphery of the magnetic circuit system is provided with a second locking platform. The second locking platform is supported and locked onto the first locking platform, and the outer wall of the magnetic circuit system is spaced apart from the inner wall of the mounting cavity to form the ventilation channel.

4. The sound production device of claim 3, wherein The first card holder includes multiple first card holders, which are spaced apart along the periphery of the mounting component; And / or, the second card station is a ring structure arranged along the periphery of the magnetic circuit system; or, the second card station includes multiple second card stations, which are spaced apart along the periphery of the magnetic circuit system, and the second card station corresponds to the first card station one by one.

5. The sound production device of claim 3, wherein The inner wall of the mounting cavity adjacent to the first end protrudes into the mounting cavity to form a positioning platform. The end of the magnetic circuit system facing the diaphragm is limited and abutted against the positioning platform, so that the magnetic circuit system is limited between the positioning platform and the first card plate.

6. The sound production device of claim 5, wherein The positioning platform includes multiple positioning platforms, which are spaced apart along the periphery of the first end; And / or, the inner wall of the mounting cavity is further provided with a plurality of positioning protrusions, the plurality of positioning protrusions being spaced apart along the periphery of the mounting component and respectively abutting against the outer periphery of the magnetic circuit system, so as to form a ventilation channel between two adjacent positioning protrusions.

7. The sound production device of claim 1, wherein The first end extends toward the mounting cavity to form a support platform, and the periphery of the diaphragm is supported and connected to the support platform; The magnetic circuit system has one end facing the diaphragm spaced apart from the support platform to form a ventilation gap connecting the first rear cavity and the ventilation channel.

8. The sound production device of claim 7, wherein, The support platform is inclined on the side facing the magnetic circuit system. And / or, the support platform is provided with a recessed groove for the lead wire of the voice coil to pass through.

9. The sound production device of claim 1, wherein, The second end protrudes towards the mounting cavity to form a third locking platform, and the periphery of the rear cover forms a fourth locking platform. The fourth locking platform is supported and locked onto the third locking platform so that the rear cover is connected to the second end.

10. The sound production device of claim 1, wherein, The rear cover has a sound-guiding protrusion on the side facing the magnetic circuit system, and the sound-guiding protrusion protrudes towards the side closer to the magnetic circuit system.

11. The sound production device of claim 10, wherein, The side surface of the sound-guiding protrusion is an inclined arc-shaped surface; And / or, the sound-guiding protrusion has an arc-shaped top surface; And / or, the side of the rear cover facing the magnetic circuit system is provided with a plurality of support protrusions, which are spaced apart; wherein, the plurality of support protrusions are arranged radially around the sound-guiding protrusion; and / or, the side of the rear cover facing the magnetic circuit system is provided with a support ring surrounding the sound-guiding protrusion, one end of each support protrusion is connected to the side of the support ring opposite to the sound-guiding protrusion, and extends toward the periphery of the rear cover.

12. The sound production device of any one of claims 1 to 11, wherein, The magnetic circuit system includes a U-shaped iron and a central magnet. The U-shaped iron is disposed in the mounting cavity, and the outer wall of the U-shaped iron and the inner wall of the mounting cavity form the ventilation channel. The U-shaped iron is provided with a receiving groove, and the central magnet is disposed in the receiving groove and spaced from the side wall of the receiving groove to form the magnetic gap. The central magnet includes a central magnet and a central washer stacked together, and the central magnet is connected to the bottom wall of the receiving groove. And / or, the voice coil includes a skeleton and a voice coil wire wound around the skeleton, the skeleton is cylindrical, one end of the skeleton is connected to the diaphragm, and the skeleton is provided with a through hole; And / or, the diaphragm includes a dome, a folded ring portion surrounding the dome, and a fixing portion connected to the outside of the folded ring portion, the fixing portion being supported and connected to the first end; wherein, the dome protrudes in a direction away from the magnetic circuit system; And / or, the sound-generating device further includes a front cover, which is disposed on the side of the diaphragm facing away from the magnetic circuit system and connected to the mounting member; wherein, the front cover is provided with a conductive element, and the lead wire of the voice coil is connected to the conductive element; and / or, the periphery of the front cover extends toward the outer wall of the mounting member to form a snap-fit ​​platform, and the outer wall of the mounting member is provided with a snap-fit ​​ring platform that snaps into the snap-fit ​​platform.

13. An electronic device, comprising: The electronic device includes a sound-generating device as described in any one of claims 1 to 12.

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