Vibration sound device

Abstract

An embodiment of the present invention provides a vibration sound-generating device, comprising a housing, a sound-generating unit, and a motor vibration system. The motor vibration system comprises a vibration unit having a coil and an elastic member. The sound-generating unit comprises a basin, a vibration system, a magnetic circuit system, and a front cover. The vibration system comprises a first vibration system and a second vibration system, wherein the first vibration system surrounds and is coaxial with the second vibration system. The first vibration system comprises a first diaphragm and a first voice coil. The second vibration system comprises a second diaphragm and a second voice coil. The magnetic circuit system is fixed to the housing. The magnetic circuit system comprises a first magnetic gap and a second magnetic gap, the first voice coil is inserted in the first magnetic gap and drives the first diaphragm to vibrate and produce bass sounds. The second voice coil is inserted in the second magnetic gap and drives the second diaphragm to vibrate and produce treble sounds. The vibration sound-generating device using the present invention has a small overall thickness and volume and excellent acoustic performance.

Description

Technical field

[0001] The present invention relates to the field of electroacoustic conversion, and in particular to a vibration sound-generating device used in electronic speaker products. [Background Technology]

[0002] With the advent of the mobile internet era, the number of smart mobile devices continues to rise. Among these devices, mobile phones are undoubtedly the most common and portable. Currently, mobile phones have a wide variety of functions, including high-quality music and vibration functions. Therefore, sound-generating devices that provide vibration and sound playback are widely used in today's smart mobile devices.

[0003] The sound-generating device in the related technology includes a shell and a sound-generating unit and a motor vibration system housed in the shell. The sound-generating unit includes a basin frame and a vibration system and a magnetic circuit system with a magnetic gap respectively fixed to the basin frame; the motor vibration system is attached to the side of the magnetic circuit system away from the vibration system.

[0004] However, the sound-generating unit and the motor vibration system in the sound-generating device described in the related art can be controlled independently. However, since the motor vibration system is stacked below the sound-generating unit, the thickness of the sound-generating device increases, making it difficult to make the sound-generating device thinner and lighter. In addition, the respective magnetic steels of the sound-generating unit and the motor vibration system are not on the same plane, and the operation of their respective magnetic field driving forces interferes with and affects each other, resulting in a large number of magnetic steels in the sound-generating device, resulting in a large volume and an inability to achieve miniaturization, thereby resulting in poor acoustic and vibration performance of the sound-generating device. In addition, how to improve the acoustic performance of the sound-generating unit on the basis of the sound-generating device so that the high and low frequency performance of the sound-generating unit is good is a technical problem that needs to be solved.

[0005] Therefore, it is necessary to provide a new vibration sound-generating device to solve the above technical problems. [Summary of the invention]

[0006] The object of the present invention is to provide a vibration sound-generating device with small overall thickness and volume and excellent acoustic performance.

[0007] In order to achieve the above-mentioned purpose, the present invention provides a vibration sound-generating device, which includes a shell with a receiving space, a sound-generating unit received in the receiving space, and a sound-conducting channel formed in the receiving space, wherein the sound-generating unit is connected to the outside world through the sound-conducting channel; the vibration sound-generating device also includes a motor vibration system received in the receiving space, wherein the motor vibration system includes a vibration unit and an elastic member insert for suspending the vibration unit in the receiving space, wherein the vibration unit includes a coil; the sound-generating unit includes a basin, a vibration system and a magnetic circuit system respectively fixed to the basin, and a front cover fixed to the vibration system, wherein the front cover and the vibration system are spaced apart to form a front sound cavity, the sound-conducting channel connects the front sound cavity with the outside world, and the vibration unit is located on the side of the magnetic circuit system away from the front cover; the vibration The system includes a first vibration system and a second vibration system fixed to the basin frame, the first vibration system surrounds the second vibration system and is coaxially arranged with the second vibration system; the first vibration system includes a first annular diaphragm fixed to the basin frame and a first voice coil fixed to the first diaphragm and driving the first diaphragm to vibrate and produce sound, the second vibration system includes a second diaphragm and a second voice coil fixed to the second diaphragm and driving the second diaphragm to vibrate and produce sound, the first diaphragm is spaced apart and surrounds the second diaphragm; the magnetic circuit system has a first magnetic gap and a second magnetic gap set at intervals, the first magnetic gap surrounds the second magnetic gap, the first voice coil is inserted in the first magnetic gap and drives the first diaphragm to vibrate and produce bass, and the second voice coil is inserted in the second magnetic gap and drives the second diaphragm to vibrate and produce treble.

[0008] Preferably, the vibration sound-generating device also includes an insert inserted into the magnetic circuit system from a side of the magnetic circuit system away from the first diaphragm and fixed to the magnetic circuit system, and a conductive part fixed to the insert, the magnetic circuit system is arranged around the insert, the insert is provided with a conductive terminal passing through it, and the second voice coil is connected to the conductive part through the conductive terminal; one end of the conductive part is connected to the conductive terminal, and the other end of the conductive part passes through the shell and is at least partially exposed to the shell.

[0009] Preferably, the sound unit also includes a support frame fixed to the shell and arranged around the insert; the magnetic circuit system includes a first magnet, a second magnet, a magnetic bowl, a third magnet and a magnetic conductive plate, the first magnet is annular and stacked and fixed to the support frame, the second magnet is stacked and fixed to the support frame and arranged around the first magnet, the first magnet and the third magnet are together spaced apart from the second magnet to form the first magnetic gap, the first magnet and the second magnet are together arranged opposite to the coil, and the coil is located within the magnetic field range of the first magnet and the second magnet; the magnetic bowl includes a magnetic bowl body that is annular and stacked and fixed to the first magnet and an annular magnetic bowl extension that is bent and extended from the inner circumference of the magnetic bowl body away from the support frame, and the magnetic bowl extension surrounds the insert; the third magnet is stacked and fixed on the side of the magnetic bowl body close to the vibration system, the third magnet surrounds the magnetic bowl extension and is spaced apart from each other to form the second magnetic gap; the magnetic conductive plate is stacked and fixed to the second magnet and fixed to the basin.

[0010] Preferably, the first magnetic steel, the second magnetic steel and the third magnetic steel are all magnetized along the vibration direction of the vibration sound-generating device, and the first magnetic steel and the third magnetic steel are arranged opposite to each other with the same poles, and the magnetization directions of the first magnetic steel and the second magnetic steel are opposite.

[0011] Preferably, the sound unit also includes a ring-shaped fixing ring stacked and fixed on the third magnet, and the outer peripheral support of the second diaphragm is fixed to the fixing ring; the magnetic circuit system also includes an auxiliary magnet stacked and fixed on the side of the third magnet close to the vibration system, the auxiliary magnet is ring-shaped and surrounds the insert, and the fixing ring is connected to the outer peripheral side of the auxiliary magnet.

[0012] Preferably, the insert includes a first section, a second section extending from the first section, and a third section extending from the second section away from the first section. The first section is located on the inner circumference of the support frame and is fixed to the side of the first magnet away from the vibration system. The first magnet surrounds the second section, and the magnetic bowl extension surrounds the third section. The cross-sectional area of ​​the first section, the cross-sectional area of ​​the second section, and the cross-sectional area of ​​the third section decreases successively.

[0013] Preferably, the second diaphragm, the fixing ring and the front cover together form an inner acoustic cavity, the fixing ring is provided with a sound outlet running through it, and the inner acoustic cavity is connected with the front acoustic cavity through the sound outlet.

[0014] Preferably, the coils include two, and the two coils are respectively arranged on opposite sides of the insert along the vibration direction of the vibration unit.

[0015] Preferably, the vibration unit also includes a mass block, the elastic member is respectively fixed on opposite sides of the mass block along the vibration direction, the coil is fixed to the mass block, the mass block is provided with a mounting hole passing through it, and the support frame is fixed to the shell after passing through the mounting hole.

[0016] Preferably, the shell is provided with a protrusion protruding in a direction close to the magnetic circuit system, and the support frame is fixed to the protrusion.

[0017] Compared to related technologies, the vibration sound-generating device of the present invention utilizes a sound-generating unit to create a vibration system and a magnetic circuit system. The vibration system comprises a first vibration system and a second vibration system, with the first vibration system surrounding the second vibration system and arranged coaxially with the second vibration system. The first vibration system comprises a first diaphragm and a first voice coil, while the second vibration system comprises a second diaphragm and a second voice coil. The magnetic circuit system includes a first magnetic gap and a second magnetic gap. The first voice coil is inserted within the first magnetic gap and drives the first diaphragm to vibrate and produce bass, while the second voice coil is inserted within the second magnetic gap and drives the second diaphragm to vibrate and produce treble. This structure enables the bass and treble to form a coaxial full-band speaker, providing high-quality sound, resulting in excellent acoustic performance for the vibration sound-generating device of the present invention. The vibration sound-generating device of the present invention is provided with a vibration unit having a coil through a motor vibration system, and the vibration unit is suspended in the receiving space through an elastic member, and the vibration unit is located on the side of the magnetic circuit system away from the front cover. This structure enables the vibration sound-generating device for linear vibration to fully utilize the mass of the sound-generating unit and the magnetic steel in the magnetic circuit system, which can maximize the release of the internal space of the vibration sound-generating device and enhance the driving force of the linear vibration, thereby making the vibration performance of the vibration sound-generating device good, and at the same time making the overall thickness of the vibration sound-generating device small, which is conducive to the lightweight application of the vibration sound-generating device.

Brief Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:

[0019] Figure 1 Schematic diagram of the three-dimensional structure of the vibration sound-generating device of the present invention;

[0020] Figure 2 Schematic diagram of the three-dimensional structure of the vibration sound-generating device of the present invention from another angle;

[0021] Figure 3 This is a partial exploded view of the three-dimensional structure of the vibration sound-generating device of the present invention;

[0022] Figure 4 For the Figure 3 Cross-section diagram along line AA;

[0023] Figure 5 For the Figure 4 Enlarged view of part B;

[0024] Figure 6 For the Figure 3 Cross-section diagram of the midline CC;

[0025] Figure 7 This is a partial three-dimensional structural diagram of the vibration sound-generating device of the present invention without the shell;

[0026] Figure 8 It is a schematic diagram of the three-dimensional assembly structure of the sound-generating unit and coil of the vibration sound-generating device of the present invention. [Specific implementation method]

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] The present invention provides a vibration sound-generating device 100. Figures 1-8 .

[0029] The vibration sound-generating device 100 includes a housing 10 having a housing 101, a sound-generating unit 20 housed within the housing 101, a sound-conducting channel 30 formed within the housing 101, a motor vibration system 40 housed within the housing 101, an insert 50, and a conductive member 60 secured to the insert. The sound-generating unit 20 communicates with the outside world via the sound-conducting channel 30. The motor vibration system 40 is provided with a coil 4011.

[0030] In this embodiment, the housing 10 is assembled from separate housings.

[0031] The sound unit 20 includes a basin frame 1, a vibration system 2 and a magnetic circuit system 3 respectively fixed to the basin frame 1, a front cover 4 fixed to the vibration system 2, and a support frame 5 fixed to the shell 10 and arranged around the insert 50.

[0032] In this embodiment, the front cover 4 is fixed to the housing 10 to form a sealing structure. This structure reduces the thickness of the vibration sound-generating device 100, which is beneficial for miniaturization of the vibration sound-generating device 100.

[0033] The front cover 4 and the vibration system 2 are spaced apart and together form a front acoustic cavity 201. The sound guide channel 30 connects the front acoustic cavity 201 with the outside world. In this embodiment, the coil 4011 of the motor vibration system 40 is located on the side of the magnetic circuit system 3 away from the front cover 4.

[0034] The vibration system 2 includes a first vibration system 2 a fixed to the basin frame 1 , a second vibration system 2 b , a frame 25 , and an elastic support assembly 26 .

[0035] The first vibration system 2a surrounds the second vibration system 2b and is coaxially arranged with the second vibration system 2b.

[0036] The first vibration system 2a includes a first annular diaphragm 21 fixed to the basin frame 1 and a first voice coil 22 fixed to the first diaphragm 21 and driving the first diaphragm 21 to vibrate and produce bass.

[0037] The second vibration system 2 b includes a second diaphragm 23 and a second voice coil 24 fixed to the second diaphragm 23 and driving the second diaphragm 23 to vibrate and produce high-pitched sounds.

[0038] The first diaphragm 21 is spaced apart from and surrounds the second diaphragm 23. The first diaphragm 21 is located on the outside, which increases the size of the woofer, thereby improving the acoustic performance of the vibration sound-generating device 100 in terms of bass.

[0039] The first diaphragm 21 and the second diaphragm 23 are coaxially arranged. This structure enables bass and treble to form a coaxial full-band speaker, providing high-quality sound effects, thereby making the vibration sound-generating device 100 of the present invention have excellent acoustic performance.

[0040] One end of the skeleton 25 is connected to the first diaphragm 21 , and the other end of the skeleton 25 is connected to the first voice coil 22 .

[0041] The elastic support component 26 is spaced apart from the first diaphragm 21. In this embodiment, the basin is rectangular. In order to make full use of the space on the opposite sides of the short axis of the basin 1, in this embodiment, the elastic support component 26 is arranged on the opposite sides of the short axis of the basin 1. One end of the elastic support component 26 is fixed to the basin 1, and the other end of the elastic support component 26 is connected to the first voice coil 22 by being fixed to the skeleton 25. On the one hand, the elastic support component 26 is used to enhance the vibration effect of the first diaphragm 21 and improve the acoustic performance of the vibration sound-generating device 100. On the other hand, it is used to balance the swing of the vibration system 2 and improve the stability of the vibration sound-generating device 100.

[0042] In this embodiment, there are two elastic support assemblies 26. The two elastic support assemblies 26 are respectively located on opposite sides of the short axis of the basin frame 1. The symmetrical distribution of the two elastic support assemblies 26 provides more stable support for the first voice coil 22 and better vibration reliability.

[0043] In this embodiment, the side of the magnetic circuit system 3 away from the first diaphragm 21 is fixed to the shell 10. The coil 4011 is located within the magnetic field generated by the magnet of the magnetic circuit system 3, and the magnet of the magnetic circuit system 3 interacts with the coil 4011 to provide driving force. This setting allows the motor vibration system 40 to fully utilize the mass of the sound-emitting unit 20 and the magnet in the magnetic circuit system 3, which can maximize the release of the internal space of the vibration sound-emitting device 100 and enhance the driving force of linear vibration, thereby making the vibration performance of the vibration sound-emitting device 100 good, and at the same time making the overall thickness of the vibration sound-emitting device 100 small, which is conducive to the lightweight application of the vibration sound-emitting device 100. In this embodiment, the insert 50 is embedded in the center position of the magnetic circuit system 3.

[0044] The magnetic circuit system 3 has a first magnetic gap 301 and a second magnetic gap 302 that are spaced apart.

[0045] The first voice coil 22 is inserted into the first magnetic gap 301 and drives the first diaphragm 21 to vibrate and emit bass, so that the vibration sound-generating device 100 provides a bass sound effect function.

[0046] The second voice coil 24 is inserted into the second magnetic gap 302 and drives the second diaphragm 23 to vibrate and emit high-pitched sound, thereby enabling the vibration sound-generating device 100 to provide a high-pitched sound effect function.

[0047] The first magnetic gap 301 surrounds the second magnetic gap 302. This structure realizes coaxial full-band sound generation, so that the vibration sound-generating device 100 of the present invention has good acoustic performance.

[0048] Specifically, the magnetic circuit system 3 includes a first magnetic steel 32 , a second magnetic steel 33 , a magnetic bowl 34 , a third magnetic steel 35 and a magnetic conductive plate 36 .

[0049] The first magnetic steel 32 is annular and is stacked and fixed on the support frame 5 .

[0050] The second magnetic steel 33 is stacked and fixed to the support frame 5 and is disposed around the first magnetic steel 32. That is, the first magnetic steel 32 and the second magnetic steel 33 are connected and fixed to form a whole through the support frame 5, so that the first magnetic steel 32 and the second magnetic steel 33 are connected in the magnetic circuit. At the same time, the first magnetic steel 32 and the second magnetic steel 33 are fixed to the housing 10 through the support frame 5.

[0051] The magnetic bowl 34 comprises an annular magnetic bowl body 341, which is stacked and fixed to the first magnetic steel 32, and an annular magnetic bowl extension 342, which bends and extends from the inner circumference of the magnetic bowl body 341 away from the support frame 5. The magnetic bowl extension 342 surrounds the insert 50. This structure forms a groove in the magnetic bowl 34, into which the insert 50 is inserted, thereby allowing the first magnetic gap 301 to be spaced away from the insert 50. This allows the first diaphragm 21, which produces bass, to be larger in size, resulting in a better bass effect.

[0052] The third magnetic steel 35 is stacked and fixed on a side of the magnetic bowl body 341 close to the vibration system 2 .

[0053] The first magnetic steel 32 , the third magnetic steel 35 and the second magnetic steel 33 are spaced apart to form the first magnetic gap 301 .

[0054] The third magnetic steels 35 surround the magnetic bowl extension 342 and are spaced apart from each other to form the second magnetic gap 302. This structure enables the first magnetic gap 301 and the second magnetic gap 302 to surround the insert 50 to form a coaxial sounding structure.

[0055] Specifically, the first magnetic steel 32, the second magnetic steel 33, and the third magnetic steel 35 are all magnetized along the vibration direction of the vibration sound-generating device 100. The first magnetic steel 32 and the third magnetic steel 35 are arranged with the same polarity opposite to each other, that is, the first magnetic steel 32 and the third magnetic steel 35 are magnetized in opposite directions. The first magnetic steel 32 and the second magnetic steel 33 are magnetized in opposite directions.

[0056] The magnetic conductive plate 36 is stacked and fixed on the second magnetic steel 33 and is fixedly connected to the basin frame 1. The magnetic circuit system 3 is fixed to the basin frame 1 through the magnetic conductive plate 36.

[0057] In this embodiment, outer sides of the magnetic conductive plates 36 are fixed to opposite sides of the long axis of the basin frame 1 .

[0058] In this embodiment, the sound unit 20 further includes a fixing ring 70. The fixing ring 70 is annular and is stacked and fixed to the third magnetic steel 35. The outer periphery of the second diaphragm 23 is supported and fixed to the fixing ring 70. In this embodiment, the fixing ring 70 is an annular steel ring.

[0059] In this embodiment, one end of the fixing ring 70 is fixed to the front cover 4, and the other end of the fixing ring 70 is fixed to the magnetic circuit system 3. The fixing ring 70 is used to fix the magnetic circuit system 3 to the front cover 4, that is, the magnetic circuit system 3 is fixed to the housing 10 by being fixed to the front cover 4, and the other end of the magnetic circuit system 3 is directly fixed to the housing 10. This structure ensures that the sound unit 20 remains intact when the vibration sound-generating device 100 vibrates, thereby improving the reliability of the vibration sound-generating device 100.

[0060] The second diaphragm 23, the fixing ring 70, and the front cover 4 together form an inner acoustic cavity 202. The fixing ring 70 is provided with a sound outlet 203 extending therethrough. The inner acoustic cavity 202 communicates with the front acoustic cavity 201 through the sound outlet 203. The inner acoustic cavity 202 and the sound outlet 203 enhance the acoustic effect of the second diaphragm 23 in producing high-pitched sounds, improving the acoustic performance of the high-pitched sounds.

[0061] In this embodiment, the magnetic circuit system 3 further includes an auxiliary magnetic steel 31 stacked and fixed on a side of the third magnetic steel 35 close to the vibration system 2 .

[0062] The auxiliary magnetic steel 31 is annular and surrounds the insert 50. The fixing ring 70 is connected to the outer periphery of the auxiliary magnetic steel 31. The auxiliary magnetic steel 31 can be used to position and install the fixing ring 70 during assembly, thereby facilitating the production of the vibration sound-generating device 100 and improving the production yield. More preferably, this structure allows the fixing ring 70 to be more firmly fixed in the aforementioned two directions, namely, the outer periphery of the auxiliary magnetic steel 31 and the third magnetic steel 35, thereby better securing the fixing ring 70 to the magnetic circuit system 3.

[0063] The auxiliary magnetic steel 31 and the third magnetic steel 35, stacked sequentially, are separated from the magnetic bowl extension 342 to form the second magnetic gap 302. The auxiliary magnetic steel 31 ensures that the magnetic steels on both sides of the second magnetic gap 302 are of equal height, and the outer periphery of the auxiliary magnetic steel 31 can be positioned to fix the fixing ring 70, fully utilizing the internal space and enhancing the magnetic lines of force of the magnetic circuit formed by the second magnetic gap 302. This results in a compact internal structure and good acoustic effect of the vibration sound-generating device 100, facilitating miniaturization and application of the vibration sound-generating device 100.

[0064] The motor vibration system 40 includes a vibration unit 401 and an elastic member 402 suspending the vibration unit 401 in the receiving space 101 .

[0065] The vibration unit 401 is located on a side of the magnetic circuit system 3 away from the front cover 4. Specifically, the vibration unit 401 includes the coil 4011 and a mass block 4012.

[0066] Specifically, the coil 4011 is fixed to the mass block 4012. The coil 4011 includes two. The two coils 4011 are respectively arranged on opposite sides of the insert 50 along the vibration direction of the vibration unit 401. Specifically, the first magnetic steel 32 and the second magnetic steel 33 are arranged opposite to the coil 4011. The coil 4011 is located within the magnetic field range of the first magnetic steel 32 and the second magnetic steel 33. This structure allows the vibration sound-generating device 100 for linear vibration to fully utilize the mass of the sound-generating unit 20 and the magnetic steel in the magnetic circuit system 3, which can maximize the release of the internal space of the vibration sound-generating device 100 and enhance the driving force of linear vibration, thereby making the vibration performance of the vibration sound-generating device 100 good, and at the same time making the overall thickness of the vibration sound-generating device 100 small, which is conducive to the lightweight application of the vibration sound-generating device 100.

[0067] The mass block 4012 is used for counterweighting, increasing the weight of the vibration unit 401 to increase the vibration amplitude of the vibration unit 401, so that the motor vibration system 40 outputs a higher acceleration, thereby improving the vibration performance of the vibration sound-generating device 100 of the present invention.

[0068] In this embodiment, the mass block 4012 is provided with a mounting hole 4010 extending therethrough. The support frame 5 is fixed to the housing 10 after passing through the mounting hole 4010. This structure makes the internal structure of the vibration sound-generating device 100 compact and has a good acoustic effect, which is conducive to the miniaturization application of the vibration sound-generating device 100.

[0069] In order to further reduce the thickness of the vibration sound generating device 100 , in this embodiment, the housing 10 is provided with a protrusion 102 protruding toward the magnetic circuit system 3 . The support frame 5 is fixed to the protrusion 102 .

[0070] In this embodiment, at least two elastic members 402 are fixed to opposite sides of the mass block 4012 along the vibration direction. The elastic members 402 include at least two elastic members 402, which are disposed on opposite sides of the mass block 4012 along the vibration direction of the vibration unit 401. The elastic members 402 are V-shaped or C-shaped springs. In this embodiment, the elastic members are V-shaped springs.

[0071] The insert 50 is inserted into the magnetic circuit system 3 from the side of the magnetic circuit system 3 away from the first diaphragm 21 and fixed to the magnetic circuit system 3. The magnetic circuit system 3 is arranged around the insert 50. The insert 50 is provided with a conductive terminal 501 extending therethrough, and the second voice coil 24 is connected to the conductive member 60 via the conductive terminal 501. This structure facilitates the electrical connection of the second vibration system 2b and improves the reliability of the vibration sound-generating device 100.

[0072] Specifically, the insert 50 includes a first section 502, a second section 503 extending from the first section 502, and a third section 504 extending from the second section 503 away from the first section 502. The first section 502 is located on the inner circumference of the support frame 5 and is fixed to the side of the first magnetic steel 32 away from the vibration system 2. The first magnetic steel 32 surrounds the second section 503. The second magnetic steel extension 242 surrounds the third section 504. The insert 50 also has a leakage channel 500 extending therethrough.

[0073] In this embodiment, the cross-sectional areas of the first section 502, the second section 503, and the third section 504 are successively reduced. This structure facilitates the assembly of the insert 50 and the magnetic circuit system 3.

[0074] One end of the conductive member 60 is connected to the conductive terminal 501 , and the other end of the conductive member 60 passes through the housing 10 and is at least partially exposed outside the housing 10 .

[0075] Compared to related technologies, the vibration sound-generating device of the present invention utilizes a sound-generating unit to create a vibration system and a magnetic circuit system. The vibration system comprises a first vibration system and a second vibration system, with the first vibration system surrounding the second vibration system and arranged coaxially with the second vibration system. The first vibration system comprises a first diaphragm and a first voice coil, while the second vibration system comprises a second diaphragm and a second voice coil. The magnetic circuit system includes a first magnetic gap and a second magnetic gap. The first voice coil is inserted within the first magnetic gap and drives the first diaphragm to vibrate and produce bass, while the second voice coil is inserted within the second magnetic gap and drives the second diaphragm to vibrate and produce treble. This structure enables the bass and treble to form a coaxial full-band speaker, providing high-quality sound, resulting in excellent acoustic performance for the vibration sound-generating device of the present invention. The vibration sound-generating device of the present invention is provided with a vibration unit having a coil through a motor vibration system, and the vibration unit is suspended in the receiving space through an elastic member, and the vibration unit is located on the side of the magnetic circuit system away from the front cover. This structure enables the vibration sound-generating device for linear vibration to fully utilize the mass of the sound-generating unit and the magnetic steel in the magnetic circuit system, which can maximize the release of the internal space of the vibration sound-generating device and enhance the driving force of the linear vibration, thereby making the vibration performance of the vibration sound-generating device good, and at the same time making the overall thickness of the vibration sound-generating device small, which is conducive to the lightweight application of the vibration sound-generating device.

[0076] The above description is only an embodiment of the present invention. It should be pointed out that those skilled in the art can make improvements without departing from the creative concept of the present invention, but these improvements all fall within the scope of protection of the present invention.

Claims

1. A vibration sound-generating device comprising a housing having a receiving space, a sound-generating unit received in the receiving space, and a sound-conducting channel formed in the receiving space, wherein the sound-generating unit is connected to the outside world through the sound-conducting channel; characterized in that: The vibration sound generating device further comprises a motor vibration system housed in the housing space, the motor vibration system comprising a vibration unit and an elastic member suspending the vibration unit in the housing space, the vibration unit comprising a coil; The sound unit includes a basin frame, a vibration system and a magnetic circuit system respectively fixed to the basin frame, and a front cover fixed to the vibration system. The front cover and the vibration system are spaced apart and together form a front sound cavity. The sound guide channel connects the front sound cavity with the outside world. The vibration unit is located on a side of the magnetic circuit system away from the front cover. The vibration system includes a first vibration system and a second vibration system fixed to the basin frame, the first vibration system surrounding the second vibration system and being coaxially arranged with the second vibration system; the first vibration system includes a first annular diaphragm fixed to the basin frame and a first voice coil fixed to the first diaphragm and driving the first diaphragm to vibrate and produce sound; the second vibration system includes a second diaphragm and a second voice coil fixed to the second diaphragm and driving the second diaphragm to vibrate and produce sound, the first diaphragm being spaced apart and surrounding the second diaphragm; The magnetic circuit system has a first magnetic gap and a second magnetic gap spaced apart from each other, the first magnetic gap surrounding the second magnetic gap, the first voice coil inserted in the first magnetic gap and driving the first diaphragm to vibrate and produce bass, and the second voice coil inserted in the second magnetic gap and driving the second diaphragm to vibrate and produce treble; The vibration sound-generating device further includes an insert inserted into the magnetic circuit system from a side of the magnetic circuit system away from the first diaphragm and fixed to the magnetic circuit system, and a conductive member fixed to the insert, the magnetic circuit system is arranged around the insert, the insert is provided with a conductive terminal extending therethrough, and the second voice coil is connected to the conductive member via the conductive terminal; one end of the conductive member is connected to the conductive terminal, and the other end of the conductive member passes through the housing and is at least partially exposed to the housing; The sound unit also includes a support frame fixed to the shell and arranged around the insert; the magnetic circuit system includes a first magnetic steel, a second magnetic steel, a magnetic bowl, a third magnetic steel and a magnetic conductive plate, the first magnetic steel is annular and stacked and fixed to the support frame, the second magnetic steel is stacked and fixed to the support frame and arranged around the first magnetic steel, the first magnetic steel and the third magnetic steel are together spaced apart from the second magnetic steel to form the first magnetic gap, the first magnetic steel and the second magnetic steel are together arranged opposite to the coil, and the coil is located within the magnetic field range of the first magnetic steel and the second magnetic steel; The magnetic bowl includes an annular magnetic bowl body stacked and fixed to the first magnetic steel, and an annular magnetic bowl extension portion bent and extended from the inner circumference of the magnetic bowl body in a direction away from the support frame, wherein the magnetic bowl extension portion surrounds the insert; The third magnetic steels are stacked and fixed on a side of the magnetic bowl body close to the vibration system. The third magnetic steels surround the magnetic bowl extension and are spaced apart from each other to form the second magnetic gap. The magnetic conductive plate is stacked and fixed on the second magnetic steel and is fixedly connected to the basin frame.

2. The vibration sound-generating device according to claim 1, characterized in that: The first magnetic steel, the second magnetic steel and the third magnetic steel are all magnetized along the vibration direction of the vibration sound-generating device, and the first magnetic steel and the third magnetic steel are arranged opposite to each other with the same poles, and the magnetization directions of the first magnetic steel and the second magnetic steel are opposite.

3. The vibration sound-generating device according to claim 2, characterized in that: The sound unit also includes a ring-shaped fixing ring stacked and fixed on the third magnet, and the outer peripheral support of the second diaphragm is fixed to the fixing ring; the magnetic circuit system also includes an auxiliary magnet stacked and fixed on the side of the third magnet close to the vibration system, the auxiliary magnet is ring-shaped and surrounds the insert, and the fixing ring is connected to the outer peripheral side of the auxiliary magnet.

4. The vibration sound-generating device according to claim 3, characterized in that: The insert includes a first section, a second section extending from the first section, and a third section extending from the second section away from the first section. The first section is located on the inner circumference of the support frame and is fixed to the side of the first magnet away from the vibration system. The first magnet surrounds the second section, and the magnetic bowl extension surrounds the third section. The cross-sectional areas of the first section, the second section, and the third section decrease successively.

5. The vibration sound-generating device according to claim 3, characterized in that: The second diaphragm, the fixing ring and the front cover together form an inner acoustic cavity. The fixing ring is provided with a sound outlet running through it. The inner acoustic cavity is connected to the front acoustic cavity through the sound outlet.

6. The vibration sound-generating device according to claim 1, wherein: The coils include two coils, which are respectively arranged on opposite sides of the insert along the vibration direction of the vibration unit.

7. The vibration sound-generating device according to claim 1, wherein: The vibration unit also includes a mass block, the elastic member is respectively fixed to the opposite sides of the mass block along the vibration direction of the vibration unit, the coil is fixed to the mass block, the mass block is provided with a mounting hole passing through it, and the support frame is fixed to the shell after passing through the mounting hole.

8. The vibration sound-generating device according to claim 7, characterized in that: The shell is provided with a protruding portion protruding in a direction close to the magnetic circuit system, and the support frame is fixed to the protruding portion.

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