Vibration sound production device and electronic device

Abstract

The application discloses a vibrating sound production device and electronic equipment. The vibrating sound production device comprises a shell, a sound production unit and a vibrating unit. The sound production unit comprises a magnetic circuit system and a vibrating system matched with the magnetic circuit system. The magnetic circuit system is hollowly arranged to define a mounting hole. The vibrating system comprises a vibrating diaphragm assembly and a voice coil. The vibrating diaphragm assembly surrounds the outer periphery of the vibrating unit. The vibrating diaphragm assembly comprises a vibrating plate, a first folded ring and a second folded ring. One end of the voice coil is connected with the vibrating plate. The other end of the voice coil is inserted into a magnetic gap of the magnetic circuit system. The first folded ring extends along a horizontal direction and is arranged on the side of the vibrating plate away from the vibrating unit. The second folded ring extends along a vertical direction and is arranged on the side of the vibrating plate close to the vibrating unit. One end of the second folded ring is connected with the vibrating plate. According to the vibrating sound production device, the second folded ring is arranged along the vertical direction, thereby prolonging the arrangement length of the vibrating plate, increasing the radiation area of the vibrating plate and improving the medium frequency sensitivity of the sound production unit.

Description

Technical Field

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

[0002] Smart terminal devices, especially mobile phones, typically need to provide both audio and haptic feedback experiences. The audio experience comes from the sound-generating unit, while the haptic feedback experience comes from the vibration unit. In related technologies, the sound-generating and vibration units are usually integrated into a single module. However, due to the requirements of the overall application, the module needs to be as miniaturized as possible. This miniaturization often sacrifices some of the sound-generating unit's acoustic performance, impacting its audio performance and thus affecting the overall audio experience of the smart terminal. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a vibration sound-generating device, which has the advantages of compact structure and excellent acoustic performance.

[0004] The present invention also proposes an electronic device having the above-mentioned vibration sound-generating device.

[0005] According to a first aspect of the present invention, a vibration-generating device includes: a housing having an installation space within it; a sound-generating unit disposed within the installation space, the sound-generating unit including a magnetic circuit system and a vibration system cooperating with the magnetic circuit system, the magnetic circuit system being hollowly disposed to define an installation hole; and a vibration unit disposed within the installation hole and connected to the housing, the vibration system including a diaphragm assembly and a voice coil, the diaphragm assembly surrounding the periphery of the vibration unit, the diaphragm assembly including a vibrating plate, a first folded ring, and a second folded ring, one end of the voice coil being connected to the vibrating plate, the other end of the voice coil being inserted into a magnetic gap in the magnetic circuit system, the first folded ring extending horizontally and disposed on the side of the vibrating plate away from the vibration unit, the second folded ring extending vertically and disposed on the side of the vibrating plate close to the vibration unit, one end of the second folded ring being connected to the vibrating plate.

[0006] According to a first aspect embodiment of the present invention, the diaphragm assembly has a first folded ring and a second folded ring spaced apart from each other. The first folded ring is arranged in a horizontal direction and the second folded ring is arranged in a vertical direction. This reduces the space occupied by the second folded ring in the horizontal direction, thereby extending the length of the diaphragm plate, increasing the radiation area of ​​the diaphragm plate, increasing the Sd of the sound-generating unit, improving the mid-frequency sensitivity of the sound-generating unit, and thus improving the audio effect of the vibration-generating device.

[0007] According to some embodiments of the present invention, the housing includes an upper shell and a lower shell, the upper shell and the lower shell cooperate to define the installation space, the upper shell is disposed on the side of the diaphragm assembly away from the magnetic circuit system, and the end of the second folded ring away from the vibrating plate is connected to the upper shell.

[0008] In some embodiments of the present invention, the lower shell is provided with a mounting port that is directly opposite to the mounting hole, the vibration unit is mounted in the mounting hole through the mounting port, and the bottom of the vibration unit is sealed to the mounting port.

[0009] In some embodiments of the present invention, the top of the vibration unit is spaced apart from the inner peripheral wall of the upper shell; or, the top of the vibration unit abuts against the inner peripheral wall of the upper shell; or, the upper shell is provided with a clearance opening opposite to the mounting hole, and the top of the vibration unit is exposed through the clearance opening into the upper shell.

[0010] According to some embodiments of the present invention, the magnetic circuit system includes a magnetic yoke, a central magnetic part, and a side magnetic part surrounding the periphery of the vibration unit. The side of the central magnetic part and the side magnetic part away from the diaphragm assembly is disposed on the magnetic yoke. The central magnetic part and the side magnetic part are spaced apart to form the magnetic gap. The central magnetic part is provided with the mounting hole. The end of the second folded ring away from the vibration plate is connected to the top of the central magnetic part.

[0011] In some embodiments of the present invention, the side magnetic portion includes a side magnet and a side magnetic plate disposed on the side of the side magnet away from the magnetic yoke. A portion of the side magnetic plate is bent and extended toward the direction close to the diaphragm assembly to form a mounting portion, and the end of the first folded ring away from the vibrating plate is connected to the mounting portion.

[0012] In some embodiments of the present invention, the vibrating plate includes a first horizontal connecting portion, a second horizontal connecting portion, and a vertically bent extension portion whose two ends are respectively connected to the first horizontal connecting portion and the second horizontal connecting portion. At least a portion of the vertically bent extension portion extends in a vertical direction away from the magnetic circuit system. The first horizontal connecting portion is connected to the voice coil, and the second horizontal connecting portion is connected to the second folded ring.

[0013] In some embodiments of the present invention, the central magnetic part includes a central magnet disposed on a central magnetic plate on the side of the central magnet away from the magnetic yoke, and the second folded ring is connected to the central magnetic plate; or, the central magnetic part includes a first central magnet, a central magnetic plate, and a second central magnet stacked sequentially along the vibration direction of the diaphragm assembly, the second folded ring being connected to the first central magnet, and the second central magnet being connected to the magnetic yoke; or, the central magnetic part includes a first central magnet, a central magnetic plate, and a second central magnet stacked sequentially along the vibration direction of the diaphragm assembly, the second central magnet being connected to the magnetic yoke, the first central magnet being disposed away from the second folded ring, and the second folded ring being connected to the central magnetic plate.

[0014] According to some embodiments of the present invention, the vibration unit, the magnetic circuit system and the housing cooperate to define a rear acoustic cavity that communicates with the inner cavity of the sound-generating unit, and the rear acoustic cavity is provided with sound-absorbing material.

[0015] An electronic device according to a second aspect of the present invention includes a vibration-generating sound device according to the first aspect of the present invention described above.

[0016] According to the second aspect of the present invention, the electronic device is provided with the vibration sound-generating device of the above embodiment. The vibration sound-generating device has a compact structure and can simultaneously have sound generation function and tactile vibration function, and also has a good sound generation effect, thereby greatly improving the user experience and product competitiveness of the electronic device.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of a vibration sound-generating device according to an embodiment of the present invention;

[0020] Figure 2 This is an exploded view of a vibration sound-generating device according to an embodiment of the present invention;

[0021] Figure 3 This is a vertical cross-sectional view of a vibration sound-generating device according to an embodiment of the present invention;

[0022] Figure 4 This is a vertical cross-sectional view of a vibration sound-generating device according to another embodiment of the present invention.

[0023] Figure label:

[0024] Vibration sound generating device 100,

[0025] Housing 1, front acoustic cavity 1a, rear acoustic cavity 1b, upper shell 11, middle shell 12, lower shell 13, mounting port 13a.

[0026] Sound unit 2,

[0027] Magnetic circuit system 21, mounting hole 21a, magnetic yoke 211, central magnetic part 212, central magnet 2121, central magnetic plate 2122, side magnetic part 213, side magnet 2131, side magnetic plate 2132, mounting part 21321.

[0028] Vibration system 22, diaphragm assembly 221, diaphragm plate 2211, first horizontal connecting part 22111, second horizontal connecting part 22112, vertically bent extension part 22113, first surround 2212, second surround 2213, voice coil 222.

[0029] Vibration unit 3.

[0030] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0032] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0033] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions 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 those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0034] In this invention, the descriptions of directions such as "up", "down", "front", "back", "left", and "right" are based on the directions shown in the accompanying drawings and are only used to explain the relative positional relationships between the components in the posture shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0035] The following is for reference. Figures 1-4 A detailed description of a vibration sound-generating device 100 according to a first aspect embodiment of the present invention is provided, wherein the vibration sound-generating device 100 can be a loudspeaker that combines sound generation function and tactile vibration function.

[0036] like Figures 1-4 As shown, the vibration sound-generating device 100 according to a first aspect embodiment of the present invention includes: a housing 1, a sound-generating unit 2, and a vibration unit 3.

[0037] The housing 1 may have an installation space, and the sound-generating unit 2 may be installed in the installation space. The sound-generating unit 2 includes a magnetic circuit system 21 and a vibration system 22 that cooperates with the magnetic circuit system 21. The magnetic circuit system 21 is hollow to define the installation hole 21a. The vibrating unit 3 can be disposed in the mounting hole 21a and connected to the housing 1. The vibrating system 22 can include a diaphragm assembly 221 and a voice coil 222. The diaphragm assembly 221 surrounds the outer periphery of the vibrating unit 3. The diaphragm assembly 221 includes a diaphragm plate 2211, a first folded ring 2212 and a second folded ring 2213. One end of the voice coil 222 is connected to the diaphragm plate 2211, and the other end of the voice coil 222 is inserted into the magnetic gap of the magnetic circuit system 21. The first folded ring 2212 extends horizontally and is disposed on the side of the diaphragm plate 2211 away from the vibrating unit 3. The second folded ring 2213 extends vertically and is disposed on the side of the diaphragm plate 2211 close to the vibrating unit 3. One end of the second folded ring 2213 is connected to the diaphragm plate 2211.

[0038] Specifically, since the magnetic circuit system 21 of the sound-generating unit 2 has a hollow mounting hole 21a, the vibration unit 3 is housed within the mounting hole 21a, and the diaphragm assembly 221 is formed into a ring and surrounds the outer periphery of the vibration unit 3. This creates a nested structure where the sound-generating unit 2 is located around the vibration unit 3, thereby making the overall structure of the vibration sound-generating device 100 more compact and saving installation space. The diaphragm assembly 221 has a first folded ring 2212 and a second folded ring 2213 spaced apart. The first folded ring 2212 is located on the side of the vibrating plate 2211 away from the vibration unit 3 (outer side), and extends horizontally (e.g., ...). Figures 3-4 The second folding ring 2213 is located on the side (inner side) of the vibrating plate 2211 near the vibrating unit 3, and the first folding ring 2212 is arranged in the vertical direction (as shown in the left-right direction). Figures 3-4 The second fold ring 2213 is set vertically (as shown in the vertical direction). It can be understood that by setting the second fold ring 2213 vertically, the space occupied by the second fold ring 2213 in the horizontal direction can be reduced, thereby extending the setting length of the diaphragm 2211, increasing the radiation area of ​​the diaphragm 2211, thereby increasing the Sd of the sound generating unit 2, improving the mid-frequency sensitivity of the sound generating unit 2, and thus improving the audio effect of the vibration sound generating device 100.

[0039] According to a first aspect embodiment of the present invention, the vibration sound-generating device 100 has a diaphragm assembly 221 having a first folded ring 2212 and a second folded ring 2213 spaced apart from each other. The first folded ring 2212 is arranged in a horizontal direction, and the second folded ring 2213 is arranged in a vertical direction. This reduces the space occupied by the second folded ring 2213 in the horizontal direction, thereby extending the length of the vibrating plate 2211, increasing the radiation area of ​​the vibrating plate 2211, increasing the Sd of the sound-generating unit 2, improving the mid-frequency sensitivity of the sound-generating unit 2, and thus improving the audio effect of the vibration sound-generating device 100.

[0040] like Figure 2 and Figure 4 As shown, according to some embodiments of the present invention, the housing 1 may include an upper housing 11 and a lower housing 13, the upper housing 11 and the lower housing 13 cooperating to define an installation space, the upper housing 11 being disposed on the side of the diaphragm assembly 221 away from the magnetic circuit system 21 (e.g. Figure 4 The upper side shown), the end of the second folding ring 2213 away from the vibrating plate 2211 (as shown above) Figure 4 The upper end shown is connected to the upper shell 11, thereby the upper shell 11 can define sufficient assembly space, and the second folding ring 2213 can be easily fixed to the upper shell 11.

[0041] It should be noted that the structural configuration of the housing 1 is not limited to this. For example, in Figure 2In the specific example shown, the housing 1 may include an upper housing 11, a middle housing 12 and a lower housing 13 arranged sequentially in the vertical direction. One end of the middle housing 12 is engaged with the upper housing 11, and the other end of the middle housing 12 is engaged with the lower housing 13. The middle housing 12, together with the upper housing 11 and the lower housing 13, defines the installation space.

[0042] like Figures 2-3 As shown, in some embodiments of the present invention, the lower shell 13 is provided with a mounting opening 13a directly opposite the mounting hole 21a. The vibration unit 3 can be installed in the mounting hole 21a through the mounting opening 13a, and the bottom of the vibration unit 3 is sealed to the mounting opening 13a, thereby making the mating structure of the vibration unit 3 and the sound generating unit 2 more compact. Optionally, at least a portion of the lower shell 13 can be a metal part made of metal material, and the bottom of the vibration unit 3 can be laser-welded to the metal part. Of course, it is understood that the mating method of the vibration unit 3 and the sound generating unit 2 is not limited to this. For example, the vibration unit 3 can also be connected to the sound generating unit 2 by adhesive bonding.

[0043] In some embodiments of the present invention, the top of the vibration unit 3 is spaced apart from the inner peripheral wall of the upper shell 11, so that the vibration unit 3, the upper shell 11 and the diaphragm assembly 221 can jointly form a front acoustic cavity 1a that is interconnected, thereby widening the Fh of the sound generating unit 2 and improving the sound generating effect of the sound generating unit 2.

[0044] In some embodiments of the present invention, such as Figures 3-4 As shown, the top of the vibration unit 3 can abut against the inner peripheral wall of the upper shell 11; or, the upper shell 11 can be provided with a clearance opening that is directly opposite to the mounting hole 21a, and the top of the vibration unit 3 passes through the clearance opening and protrudes from the upper shell 11. Thus, through the above two arrangement methods, the matching structure of the sound generating unit 2 and the vibration unit 3 can be made more compact, and the assembly space occupied by the vibration sound generating device 100 can be saved.

[0045] like Figures 2-4As shown, according to some embodiments of the present invention, the magnetic circuit system 21 may include a magnetic yoke 211, a central magnetic part 212, and a side magnetic part 213 surrounding the vibrating unit 3. The side of the central magnetic part 212 and the side magnetic part 213 away from the diaphragm assembly 221 is disposed on the magnetic yoke 211. The central magnetic part 212 and the side magnetic part 213 are spaced apart to form a magnetic gap. The central magnetic part 212 is provided with a mounting hole 21a. The end of the second folded ring 2213 away from the vibrating plate 2211 can be connected to the top of the central magnetic part 212. Specifically, both the magnetic yoke 211 and the central magnetic part 212 are hollow, thereby forming interconnected mounting holes 21a. The second folded ring 2213 extends vertically. One end of the second folded ring 2213 is connected to the vibrating plate 2211, and the other end of the second folded ring 2213 is connected to the central magnetic part 212, thereby facilitating the assembly of the second folded ring 2213 and making the operation relatively convenient.

[0046] like Figures 3-4 As shown, in some embodiments of the present invention, the side magnetic portion 213 may include a side magnet 2131 and a side disposed on the side of the side magnet 2131 away from the magnetic yoke 211 (e.g., Figures 3-4 The side magnetic plate 2132 (shown on the upper side) has a portion bent and extended towards the diaphragm assembly 221 to form a mounting portion 21321. The end of the first folded ring 2212 away from the vibrating plate 2211 is connected to the mounting portion 21321. Specifically, a portion of the side magnetic plate 2132 is fixed to the side magnet 2131, and this portion can be bent and extended towards the diaphragm assembly 221 to form the mounting portion 21321. The first folded ring 2212 extends horizontally, with one end connected to the vibrating plate 2211 and the other end connected to the mounting portion 21321. This simplifies the housing structure of the sound-generating unit 2, allowing the side magnet 2131 to be part of the housing, resulting in a simpler and more compact overall structure for the sound-generating unit 2. Optionally, the first fold ring 2212 can be recessed toward the side magnet portion 213, because the formation of the mounting portion 21321 can limit the vibration space of the first fold ring 2212, thereby making the overall thickness of the sound generating unit 2 thinner while meeting the amplitude requirements of the first fold ring 2212.

[0047] It should be noted that the fixing method of the first folding ring 2212 is not limited to this. For example, in some specific examples, the sound generating unit 2 may also include a plastic basin frame (not shown in the figure), the side magnet 2131 may be bonded to the plastic basin frame or integrally injection molded, and the end of the first folding ring 2212 away from the vibrating plate 2211 may be bonded to the plastic basin frame or integrally injection molded.

[0048] like Figure 3As shown, in some embodiments of the present invention, the diaphragm 2211 may include a first horizontal connecting portion 22111, a second horizontal connecting portion 22112, and a vertically bent extension portion 22113 connected at both ends to the first horizontal connecting portion 22111 and the second horizontal connecting portion 22112, respectively. At least a portion of the vertically bent extension portion 22113 extends in a vertical direction away from the magnetic circuit system 21. The first horizontal connecting portion 22111 may be connected to the voice coil 222, and the second horizontal connecting portion 22112 may be connected to the second folded ring 2213. Specifically, the vibrating plate 2211 has a first horizontal connecting portion 22111 and a second horizontal connecting portion 22112 at both ends. The two ends of the first folded ring 2212 can be connected to the first horizontal connecting portion 22111 and the side magnetic portion 213 respectively. The two ends of the second folded ring 2213 are distributed and connected to the second horizontal connecting portion 22112 and the central magnetic portion 212 / upper shell 11. A vertically bent extension portion 22113 is provided between the first horizontal connecting portion 22111 and the second horizontal connecting portion 22112. At least a portion of the vertically bent extension portion 22113 extends in the vertical direction away from the magnetic circuit system 21. Thus, sufficient space can be defined between the second horizontal connecting portion 22112 and the central magnetic portion 212, thereby increasing the installation volume of the central magnetic portion 212, improving the BL value of the magnetic circuit system 21, and thus improving the vibration sensitivity of the sound generating unit 2.

[0049] It should be noted that the vertically bent extension 22113 serves to increase the space between the second horizontal connecting part 22112 and the central magnetic part 212. The vertically bent extension 22113 can be formed to extend vertically as a whole in a direction away from the magnetic circuit system 21, or it can be formed to extend vertically in a direction away from the magnetic circuit system 21. The present invention does not impose specific restrictions on the structural design of the vertically bent extension 22113.

[0050] like Figures 3-4 As shown, in some embodiments of the present invention, the central magnetic part 212 may include a central magnetic steel 2121 disposed on the side of the central magnetic steel 2121 away from the magnetic yoke 211, and a central magnetic plate 2122 disposed on the side of the central magnetic steel 2121 away from the magnetic yoke 211. The second folding ring 2213 is connected to the central magnetic plate 2122. That is, the second folding ring 2213 extends in the vertical direction, and the two ends of the second folding ring 2213 can be connected to the central magnetic plate 2122 and the vibrating plate 2211 respectively.

[0051] In another embodiment of the invention, the central magnet 212 may include components along the vibration direction of the diaphragm assembly 221 (e.g., ...). Figures 3-4The first central magnet, the central magnetic plate 2122, and the second central magnet are stacked sequentially in the vertical direction shown. The second folding ring 2213 is connected to the first central magnet, and the second central magnet is connected to the magnetic yoke 211. It can be understood that at least a portion of the vertically bent extension 22113 extends vertically away from the magnetic circuit system 21, defining sufficient space between the second horizontal connecting portion 22112 and the central magnet portion 212. This allows an additional central magnet (the first central magnet) to be provided above the central magnetic plate 2122. The central magnet portion 212 can be formed as a sandwich magnetic circuit structure, thereby increasing the BL value of the magnetic circuit system 21 and thus improving the vibration sensitivity of the sound-generating unit 2.

[0052] In another embodiment of the present invention, the central magnetic part 212 may further include a first central magnet, a central magnetic guide plate 2122, and a second central magnet stacked sequentially along the vibration direction of the diaphragm assembly 221. The second central magnet is connected to the magnetic guide yoke 211, and the first central magnet is disposed away from the second folded ring 2213. The second folded ring 2213 is connected to the central magnetic guide plate 2122. Specifically, at least a portion of the vertically bent extension 22113 extends vertically away from the magnetic circuit system 21, defining a sufficient space between the second horizontal connection 22112 and the central magnetic part 212. Thus, an additional central magnet 2121 (first central magnet) can be disposed above the central magnetic guide plate 2122. However, considering the assembly space requirements of the second folded ring 2213, the volume of the first central magnet can be appropriately reduced, so that the second folded ring 2213 is connected to the central magnetic guide plate 2122, and the first central magnet is disposed away from the second folded ring 2213. Therefore, not only can the BL value of the magnetic circuit system 21 be improved to a certain extent, but the assembly of the second fold ring 2213 can also be facilitated.

[0053] According to some embodiments of the present invention, the vibration unit 3, the magnetic circuit system 21, and the housing 1 cooperate to define a rear acoustic cavity 1b that communicates with the inner cavity of the sound-generating unit 2. The rear acoustic cavity 1b may be provided with sound-absorbing material, which may be sound-absorbing particles such as zeolite or activated carbon, or sound-absorbing cotton. Therefore, by providing sound-absorbing particles in the rear acoustic cavity 1b, the virtual space of the rear acoustic cavity 1b can be increased, thereby improving the low-frequency acoustic performance of the sound-generating unit 2.

[0054] An electronic device according to a second aspect of the present invention includes a vibration-generating sound device 100 implemented according to the first aspect of the present invention. The electronic device may be a mobile phone, a tablet, a smart wearable device, etc.

[0055] For example, in a mobile phone, the vibration unit 3 in the vibration sound-generating device 100 is a linear motor, and the sound-generating unit 2 is a speaker. The sound-generating unit 2 can meet the audio playback requirements of the mobile phone, and the vibration unit 3 can meet the vibration and tactile feedback requirements of the mobile phone.

[0056] According to the second aspect of the present invention, the electronic device is equipped with the vibration sound-generating device 100 of the above embodiment. The vibration sound-generating device 100 has a compact structure, can simultaneously have sound generation function and tactile vibration function, and also has a good sound generation effect, thereby greatly improving the user experience and product competitiveness of the electronic device.

[0057] It should be noted that the above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A vibration-generating sound device, characterized in that, include: A housing, wherein an installation space is provided within the housing; A sound-generating unit is disposed within the installation space. The sound-generating unit includes a magnetic circuit system and a vibration system that cooperates with the magnetic circuit system. The magnetic circuit system is hollowly disposed to define a mounting hole. A vibration unit is disposed within the mounting hole and connected to the housing. The vibration system includes a diaphragm assembly and a voice coil. The diaphragm assembly surrounds the outer periphery of the vibration unit. The diaphragm assembly includes a diaphragm plate, a first folded ring, and a second folded ring. One end of the voice coil is connected to the diaphragm plate, and the other end of the voice coil is inserted into the magnetic gap of the magnetic circuit system. The first folded ring extends horizontally and is located on the side of the diaphragm plate away from the vibration unit. The second folded ring extends vertically and is located on the side of the diaphragm plate closer to the vibration unit. One end of the second folded ring is connected to the diaphragm plate.

2. The vibration-generating sound device according to claim 1, characterized in that, The housing includes an upper shell and a lower shell, which cooperate to define the installation space. The upper shell is located on the side of the diaphragm assembly away from the magnetic circuit system, and the end of the second folded ring away from the vibrating plate is connected to the upper shell.

3. The vibration-generating sound device according to claim 2, characterized in that, The lower shell is provided with a mounting port that is directly opposite the mounting hole. The vibration unit is installed in the mounting hole through the mounting port, and the bottom of the vibration unit is sealed to the mounting port.

4. The vibration-generating sound device according to claim 2, characterized in that, The top of the vibration unit is spaced apart from the inner peripheral wall of the upper shell; Alternatively, the top of the vibration unit is disposed against the inner peripheral wall of the upper shell; Alternatively, the upper shell may have a clearance opening directly opposite the mounting hole, through which the top of the vibration unit protrudes from the upper shell.

5. The vibration-generating sound device according to claim 1, characterized in that, The magnetic circuit system includes a magnetically conductive yoke, a central magnetic part, and a side magnetic part surrounding the periphery of the vibration unit. The side of the central magnetic part and the side magnetic part away from the diaphragm assembly is located on the magnetically conductive yoke. The central magnetic part and the side magnetic part are spaced apart to form the magnetic gap. The central magnetic part is provided with the mounting hole. The end of the second folding ring away from the vibration plate is connected to the top of the central magnetic part.

6. The vibration-generating sound device according to claim 5, characterized in that, The side magnetic part includes a side magnet and a side magnetic plate disposed on the side of the side magnet away from the magnetic yoke. A portion of the side magnetic plate is bent and extended toward the direction close to the diaphragm assembly to form a mounting part. The end of the first folded ring away from the vibrating plate is connected to the mounting part.

7. The vibration-generating sound device according to claim 5, characterized in that, The diaphragm includes a first horizontal connecting portion, a second horizontal connecting portion, and a vertically bent extension portion whose two ends are respectively connected to the first horizontal connecting portion and the second horizontal connecting portion. At least a portion of the vertically bent extension portion extends in a vertical direction away from the magnetic circuit system. The first horizontal connecting portion is connected to the voice coil, and the second horizontal connecting portion is connected to the second folded ring.

8. The vibration-generating sound device according to claim 7, characterized in that, The central magnetic part includes a central magnet and a central magnetic plate disposed on the side of the central magnet away from the magnetic yoke, and the second folded ring is connected to the central magnetic plate; Alternatively, the central magnetic part includes a first central magnet, a central magnetic guide plate, and a second central magnet stacked sequentially along the vibration direction of the diaphragm assembly, the second folded ring being connected to the first central magnet, and the second central magnet being connected to the magnetic guide yoke; Alternatively, the central magnetic part may include a first central magnet, a central magnetic guide plate, and a second central magnet stacked sequentially along the vibration direction of the diaphragm assembly. The second central magnet is connected to the magnetic guide yoke, the first central magnet is disposed away from the second folded ring, and the second folded ring is connected to the central magnetic guide plate.

9. The vibration-generating sound device according to any one of claims 1-8, characterized in that, The vibration unit, the magnetic circuit system, and the housing cooperate to define a rear acoustic cavity that communicates with the inner cavity of the sound-generating unit, and the rear acoustic cavity is provided with sound-absorbing material.

10. An electronic device, characterized in that, Includes the vibration-generating sound device according to any one of claims 1-9.

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