Multifunctional sound-generating device

Abstract

The present invention relates to the technical field of electroacoustic conversion. Provided is a multifunctional sound-generating device, which comprises a housing, a sound-generating unit and an elastic member, wherein the sound-generating unit comprises a frame, a vibration system, and a magnetic circuit system that drives the vibration system to vibrate and produce sound; and the housing is provided with an opening. The multifunctional sound-generating device further comprises a driving coil fixed to the housing, wherein the driving coil interacts with the magnetic circuit system to drive the sound-generating unit to move in a reciprocating manner in a direction perpendicular to the vibration direction of the vibration system; and the vibration system comprises a diaphragm fixed to the frame and a vibrating voice coil that drives the diaphragm to vibrate. The multifunctional sound-generating device further comprises an annular sealing film, wherein the sealing film is connected to the housing and the sound-generating unit; the diaphragm, the sealing film and the housing jointly enclose a sealed rear cavity; and the sealing film can deform when the sound-generating unit moves in a reciprocating manner in the direction perpendicular to the vibration direction of the vibration system. Compared with the prior art, the multifunctional sound-generating device of the present invention has a simple overall structure, a good vibration effect and better acoustic performance.

Description

Multifunctional sound-generating device Technical Field

[0001] This invention relates to the field of electroacoustic conversion technology, and in particular to a multifunctional sound-generating device used in electronic motor products. Background Technology

[0002] With the advent of the mobile internet era, the number of smart mobile devices is constantly increasing. Among these mobile devices, mobile phones are undoubtedly the most common and portable mobile terminal devices. Currently, mobile phones have extremely diverse functions, including high-quality music and vibration functions. Therefore, multifunctional sound-generating devices with vibration and sound playback functions are widely used in today's smart mobile devices. Technical issues

[0003] The multifunctional sound-generating device of the related technology includes a housing and a motor vibration system housed within the housing; the motor vibration system includes a sound-generating unit fixed to the housing, a mass block fixed to the sound-generating unit, and a drive coil for driving the sound-generating unit to vibrate. The sound-generating unit is suspended inside the housing by an elastic element, and the drive coil drives the sound-generating unit to vibrate and generate sound when energized.

[0004] However, while related technologies improve the vibration performance of vibration motors by adding mass blocks, when the material density of the mass blocks is low, the overall volume of the mass blocks is too large, occupying installation space; at the same time, fixing the sound-generating unit and the housing results in poor vibration buffering and poor acoustic performance.

[0005] Therefore, it is necessary to provide a new multifunctional sound-generating device to solve the above-mentioned technical problems. Technical solutions

[0006] The purpose of this invention is to provide a multifunctional sound-generating device with a simple structure, good vibration effect, and better acoustic performance.

[0007] To achieve the above objectives, the present invention provides a multifunctional sound-generating device, comprising a housing with a receiving space, a sound-generating unit housed within the receiving space, and an elastic member that movably supports the sound-generating unit within the housing; the sound-generating unit includes a frame, a vibration system respectively fixed to opposite sides of the frame, and a magnetic circuit system for driving the vibration system to vibrate and generate sound; the housing has an opening for sound output from the sound-generating unit; the multifunctional sound-generating device further includes a drive coil fixed to the housing, the drive coil interacting with the magnetic circuit system to drive the sound-generating unit to reciprocate along a vibration direction perpendicular to the vibration system;

[0008] The vibration system includes a diaphragm fixed to the frame and a voice coil that drives the diaphragm to vibrate. The multifunctional sound-generating device also includes an annular sealing membrane. The sealing membrane is connected to the housing and the sound-generating unit respectively. The diaphragm, the sealing membrane, and the housing form a sealed rear cavity. The sealing membrane can deform when the sound-generating unit reciprocates along the vibration direction perpendicular to the vibration system.

[0009] Preferably, the hardness of the sealing film is less than 30A.

[0010] Preferably, the sealing membrane is made of one or more materials selected from silicone, rubber, and elastomer.

[0011] Preferably, the housing includes an annular frame, a bottom wall formed by bending and extending from one end of the frame toward the sound-generating unit, and a clearance portion formed through one side of the frame; the sealing membrane is fixed to the bottom wall on the side near the bottom wall, and the sealing membrane is fixed to the frame on the side near the clearance portion.

[0012] Preferably, the sealing membrane includes a sealing membrane body fixed to the bottom wall and in an annular shape, an annular support portion extending from one end of the sealing membrane body away from the bottom wall, and a stepped portion formed by recessing the support portion from the side near the sound-generating unit toward the direction away from the sound-generating unit; the support portion bends and extends toward the clearance position corresponding to the clearance position to form a bent portion; and the end of the bent portion away from the sound-generating unit is fixed to the frame.

[0013] Preferably, the multifunctional sound-generating device further includes an annular sealing ring, the inner and outer sides of which are fixed to the sealing membrane and the sound-generating unit, respectively.

[0014] Preferably, the sealing ring includes a ring-shaped sealing ring body fixed to the stepped portion, a first connecting portion formed by bending and extending the sealing ring body from one end near the bottom wall toward the sound-emitting unit, and a second connecting portion formed by bending and extending the sealing ring body from one end away from the bottom wall toward the frame; the first connecting portion is fixed to the sound-emitting unit, and the second connecting portion is fixed to one end of the support portion away from the sealing membrane body.

[0015] The first connecting part is fixed to the diaphragm, and the sealing ring body extends along the vibration direction of the vibration system and is spaced apart from the frame in the vibration direction perpendicular to the vibration system.

[0016] Preferably, the sealing film and the housing are integrally formed or fixedly connected by adhesive bonding.

[0017] Preferably, the multifunctional sound-generating device further includes a conductive element, which connects the drive coil and / or the vibrating voice coil and introduces an external electrical signal to the drive coil and / or the vibrating voice coil.

[0018] Preferably, the conductive element includes a first conductive element and a second conductive element. One end of the first conductive element is fixed to the drive coil and forms an electrical connection, and the other end extends to the outside of the housing for connecting to an external device. One end of the second conductive element is fixed to the vibrating voice coil and forms an electrical connection, and the other end extends to the outside of the housing for connecting to an external device. Beneficial effects

[0019] Compared with the prior art, in the multifunctional sound-generating device of the present invention, the sound-generating unit is movably supported in the housing by an elastic element, and the housing has an opening for sound output of the sound-generating unit. The multifunctional sound-generating device also includes a drive coil fixed to the housing. The drive coil interacts with the magnetic circuit system to drive the sound-generating unit to reciprocate along the vibration direction perpendicular to the vibration system, thereby realizing the vibration of the sound-generating unit. At the same time, the weight of the sound-generating unit itself provides the mass effect of the motor oscillator, saving overall installation space. By connecting the housing and the sound-generating unit with a sealing diaphragm, a sealed rear cavity is formed between the diaphragm, the sealing diaphragm, and the housing. The sealing diaphragm can deform when the sound-generating unit reciprocates along the vibration direction perpendicular to the vibration system, so that the sealing diaphragm can both deform and isolate the air and sound pressure between the front cavity and the rear cavity, further improving the acoustic performance of the multifunctional sound-generating device. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments 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 these drawings without creative effort, wherein:

[0021] Figure 1 is a three-dimensional structural schematic diagram of the multifunctional sound-generating device provided in an embodiment of the present invention;

[0022] Figure 2 is an exploded three-dimensional view of the multifunctional sound-generating device provided in an embodiment of the present invention;

[0023] Figure 3 is a cross-sectional view along line AA in Figure 1;

[0024] Figure 4 is a cross-sectional view along line BB in Figure 1;

[0025] Figure 5 is a magnified view of part C in Figure 3;

[0026] Figure 6 is a schematic diagram of the structure of the sealing membrane provided in an embodiment of the present invention. Embodiments of the present invention

[0027] 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 them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Referring to Figures 1 to 6, this embodiment of the invention provides a multifunctional sound-generating device 100, which includes a housing 1 with a receiving space, a sound-generating unit 2 housed within the receiving space, and an elastic member 7 that movably supports the sound-generating unit 2 within the housing 1. The sound-generating unit 2 includes a frame 21, a vibration system 22 respectively fixed to opposite sides of the frame 21, and a magnetic circuit system 23 that drives the vibration system 22 to vibrate and generate sound. The housing 1 has an opening 13 for sound output from the sound-generating unit 2. The multifunctional sound-generating device 100 also includes a drive coil 3 fixed to the housing 1, and the drive coil 3 interacts with the magnetic circuit system 23 to drive the sound-generating unit 2 to reciprocate along a vibration direction perpendicular to the vibration system 22.

[0029] The housing 1 includes a first housing 11 with a hollow structure and a second housing 12 fixed to the first housing 11. The drive coil 3 drives the sound-generating unit 2 to vibrate. The sound-generating unit 2 is fixed to the side of the first housing 11 near the second housing 12, and the drive coil 3 is fixed to the second housing 12 and suspended inside the sound-generating unit 2. Elastic members 7 are provided on both sides of the sound-generating unit 2 to fix the sound-generating unit 2 and the first housing 11 together, so that the sound-generating unit 2 is suspended within the receiving space of the housing 1 and can reciprocate along the vibration direction perpendicular to the vibration system 22. Optionally, there are two elastic members 7, which are provided on opposite sides of the sound-generating unit 2. The elastic members 7 can be spring sheets, spring arms, or other structures.

[0030] The drive coil 3 includes an iron core 31 and a winding 32 wound around the iron core 31. The sound-generating unit 2 is provided with a through hole 236. The iron core 31 is fixed to the second housing 12 and located in the through hole 236.

[0031] The vibration system 22 includes a diaphragm 221 fixed to the frame 21 and a voice coil 222 that drives the diaphragm 221 to vibrate. The multifunctional sound-generating device 100 also includes an annular sealing diaphragm 4, which connects the housing 1 and the sound-generating unit 2. The diaphragm 221, the sealing diaphragm 4, and the housing 1 form a sealed rear cavity 8. The sealing diaphragm 4 can deform when the sound-generating unit 2 reciprocates along the vibration direction perpendicular to the vibration system 22. By utilizing the weight of the sound-generating unit 2 to provide the mass effect of the motor oscillator, the overall installation space is saved. By connecting the sealing diaphragm 4 to the housing 1 and the sound-generating unit 2, the diaphragm 221, the sealing diaphragm 4, and the housing 1 form a sealed rear cavity 8. The sealing diaphragm 4 can deform when the sound-generating unit 2 reciprocates along the vibration direction perpendicular to the vibration system 22, so that the sealing diaphragm 4 can both deform and isolate the air and sound pressure between the front cavity and the rear cavity 8, further improving the acoustic performance of the multifunctional sound-generating device 100. The magnetic circuit system 23 has a magnetic gap 233, the vibrating voice coil 222 is inserted into the magnetic gap 233, and the through hole 236 is provided through the magnetic circuit system 23.

[0032] In this embodiment, the sealing membrane 4 and the housing 1 are integrally formed or fixedly connected by adhesive bonding. This improves the structural strength of the housing 1 and the sealing membrane 4.

[0033] In this embodiment, the vibration system 22 further includes a frame 223, the two ends of which are fixed to the diaphragm 221 and the voice coil 222, respectively.

[0034] In this embodiment, the hardness of the sealing film 4 is less than 30A.

[0035] In this embodiment, the sealing membrane 4 is made of one or more materials selected from silicone, rubber, and elastomer. By using a polymer material, such as silicone, rubber, or elastomer, to make the sealing membrane 4, its hardness is less than 30A, allowing the sealing membrane 4 to deform in the X and Y directions, or in the X, Y, and Z directions, thereby isolating the diaphragm 221 from the sound pressure of the front and rear cavities 8; wherein, the X and Y directions are the vibration directions perpendicular to the vibration system 22, and the Z direction is the vibration direction of the vibration system 22.

[0036] The sealing membrane 4 is made of polymer material, which allows the sealing membrane 4 to deform as a whole, playing a damping role on the sound-generating unit 2 and providing good vibration performance.

[0037] In this embodiment, the first housing 11 of the housing 1 includes a ring-shaped frame 111, a bottom wall 112 formed by bending and extending from one end of the frame 111 towards the sound-generating unit 2, and a clearance position 113 formed through one side of the frame 111. The sealing membrane 4 is fixed to the bottom wall 112 on the side near the bottom wall 112, and fixed to the frame 111 on the side near the clearance position 113. The first housing 11 is generally rectangular, with two elastic members 7 located along the minor axis of the frame 111. The clearance position 113 is located along either the major axis of the frame 111. The opening 13 can be located on the bottom wall 112 corresponding to the diaphragm 221, enabling frontal sound generation of the sound-generating unit. Alternatively, the opening 13 can be located on the frame 111, in which case a front cavity is formed between the diaphragm 221, the sealing membrane 4, and the bottom wall 112, allowing sound output from the sound-generating unit 2. Sound can be output through the front cavity and the opening 13 on the frame 111, achieving side sound generation. At this point, the optional clearance 113 can serve as the opening 13.

[0038] In this embodiment, the sealing membrane 4 includes a sealing membrane body 41 fixed to the bottom wall 112 and in an annular shape, an annular support portion 42 extending from one end of the sealing membrane body 41 away from the bottom wall 112, and a stepped portion 43 formed by recessing the support portion 42 from the side near the sound-emitting unit 2 away from the sound-emitting unit 2; the support portion 42 bends and extends towards the avoidance position 113 corresponding to the avoidance position 113 to form a bent portion 44; the end of the bent portion 44 away from the sound-emitting unit 2 is fixed to the frame 111.

[0039] In this embodiment, the multifunctional sound-generating device 100 further includes an annular sealing ring 5, the inner and outer sides of which are fixed to the sealing diaphragm 4 and the sound-generating unit 2, respectively. The sealing ring 5 enhances the sealing performance of the sealing diaphragm 4, better isolating air and sound pressure between the front and rear chambers 8.

[0040] In this embodiment, the sealing ring 5 includes a ring-shaped sealing ring body 51 fixed to the stepped portion, a first connecting portion 52 formed by bending and extending the sealing ring body 51 from one end near the bottom wall toward the sound-emitting unit, and a second connecting portion 53 formed by bending and extending the sealing ring body 51 from one end away from the bottom wall toward the frame 111. The first connecting portion 52 is fixed to the sound-emitting unit 2, and the second connecting portion 53 is fixed to the end of the support portion 42 away from the sealing membrane body 41. This increases the sealing performance between the sealing membrane body 41 and the sound-emitting unit 2.

[0041] In this embodiment, the first connecting portion 52 is fixed to the diaphragm 221, and the sealing ring body 51 extends along the vibration direction of the vibration system 22 and is spaced apart from the frame 21 in a vibration direction perpendicular to the vibration system 22. This allows the sound-generating unit 2 to vibrate more effectively.

[0042] In this embodiment, the longitudinal section of the sealing ring 5 is arranged in a Z-shaped or S-shaped structure. The shape of the sealing ring 5 can be selected according to specific needs.

[0043] In this embodiment, the multifunctional sound-generating device 100 further includes a conductive element 6, which connects to the driving coil 3 and / or the vibrating voice coil 222 and introduces an external electrical signal to the driving coil 3 and / or the vibrating voice coil 222.

[0044] In this embodiment, the conductive element 6 includes a first conductive element 61 and a second conductive element 62. One end of the first conductive element 61 is fixed to the drive coil 3 and forms an electrical connection, and the other end extends to the outside of the housing 1 to connect to external devices. One end of the second conductive element 62 is fixed to the vibrating voice coil 222 and forms an electrical connection, and the other end extends to the outside of the housing 1 to connect to external devices.

[0045] Optionally, the conductive component 6 can be an FPC circuit board, etc.

[0046] In this embodiment, the magnetic circuit system 23 includes a magnetic cup 235 fixed to the elastic member 7, a main magnet assembly 231 stacked and fixed to the side of the magnetic cup 235 near the vibration system 22, and a secondary magnet 232 surrounding the main magnet assembly 231. A through hole 236 is formed through the main magnet assembly 231, and the secondary magnet 232 is fixed to the frame 21 on the side near the vibration system 22. The magnetic cup 235 supports and fixes the main magnet assembly 231 and the secondary magnet 232. The main magnet assembly 231 is driven to vibrate in the vertical vibration direction by the drive coil 3, thereby improving the overall vibration performance of the multifunctional sound-generating device 100.

[0047] In this embodiment, the multifunctional sound-generating device 100 further includes a pole core 234 stacked and fixed to the main magnet assembly 231. The pole core 234 enhances the magnetism of the main magnet assembly 231, thereby improving the magnetic circuit performance of the main magnet assembly 231 and the auxiliary magnet 232.

[0048] Compared with the prior art, in the multifunctional sound-generating device of the present invention, the sound-generating unit is movably supported in the housing by an elastic element, and the housing has an opening for sound output of the sound-generating unit. The multifunctional sound-generating device also includes a drive coil fixed to the housing. The drive coil interacts with the magnetic circuit system to drive the sound-generating unit to reciprocate along the vibration direction perpendicular to the vibration system, thereby realizing the vibration of the sound-generating unit. At the same time, the weight of the sound-generating unit itself provides the mass effect of the motor oscillator, saving overall installation space. By connecting the housing and the sound-generating unit with a sealing diaphragm, a sealed rear cavity is formed between the diaphragm, the sealing diaphragm, and the housing. The sealing diaphragm can deform when the sound-generating unit reciprocates along the vibration direction perpendicular to the vibration system, so that the sealing diaphragm can both deform and isolate the air and sound pressure between the front cavity and the rear cavity, further improving the acoustic performance of the multifunctional sound-generating device.

[0049] The above description is merely an embodiment of the present invention. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements all fall within the protection scope of the present invention.

Claims

1. A multifunctional sound-generating device, comprising a housing having a receiving space, a sound-generating unit housed within the receiving space, and an elastic member movably supporting the sound-generating unit within the housing; the sound-generating unit includes a frame, a vibration system respectively fixed to opposite sides of the frame, and a magnetic circuit system for driving the vibration system to vibrate and generate sound; the housing has an opening for sound output from the sound-generating unit; the multifunctional sound-generating device further includes a drive coil fixed to the housing, the drive coil interacting with the magnetic circuit system to drive the sound-generating unit to reciprocate along a vibration direction perpendicular to the vibration system; characterized in that, The vibration system includes a diaphragm fixed to the frame and a voice coil that drives the diaphragm to vibrate. The multifunctional sound-generating device also includes an annular sealing membrane. The sealing membrane is connected to the housing and the sound-generating unit respectively. The diaphragm, the sealing membrane, and the housing form a sealed rear cavity. The sealing membrane can deform when the sound-generating unit reciprocates along the vibration direction perpendicular to the vibration system.

2. The multifunctional sound-generating device according to claim 1, characterized in that, The hardness of the sealing membrane is less than 30A.

3. The multifunctional sound-generating device according to claim 1, characterized in that, The sealing membrane is made of one or more materials selected from silicone, rubber, and elastomers.

4. The multifunctional sound-generating device according to claim 1, characterized in that, The housing includes an annular frame, a bottom wall formed by bending and extending from one end of the frame toward the sound-generating unit, and a clearance portion formed through one side of the frame; the sealing membrane is fixed to the bottom wall on the side near the bottom wall, and fixed to the frame on the side near the clearance portion.

5. The multifunctional sound-generating device according to claim 4, characterized in that, The sealing membrane includes a ring-shaped sealing membrane body fixed to the bottom wall, a ring-shaped support portion extending from one end of the sealing membrane body away from the bottom wall, and a stepped portion formed by recessing the support portion from the side near the sound-emitting unit away from the sound-emitting unit; the support portion bends and extends towards the clearance position to form a bent portion corresponding to the clearance position; the end of the bent portion away from the sound-emitting unit is fixed to the frame.

6. The multifunctional sound-generating device according to claim 5, characterized in that, The multifunctional sound-generating device also includes an annular sealing ring, the inner and outer sides of which are fixed to the sealing membrane and the sound-generating unit, respectively.

7. The multifunctional sound-generating device according to claim 6, characterized in that, The sealing ring includes a ring-shaped sealing ring body fixed to the stepped portion, a first connecting portion formed by bending and extending the sealing ring body from one end near the bottom wall toward the sound-emitting unit, and a second connecting portion formed by bending and extending the sealing ring body from one end away from the bottom wall toward the frame; the first connecting portion is fixed to the sound-emitting unit, and the second connecting portion is fixed to one end of the support portion away from the sealing membrane body.

8. The multifunctional sound-generating device according to claim 7, characterized in that, The first connecting part is fixed to the diaphragm, and the sealing ring body extends along the vibration direction of the vibration system and is spaced apart from the frame in the vibration direction perpendicular to the vibration system.

9. The multifunctional sound-generating device according to claim 1, characterized in that, The sealing membrane and the shell are integrally formed or fixedly connected by adhesive bonding.

10. The multifunctional sound-generating device according to claim 1, characterized in that, The multifunctional sound-generating device also includes a conductive element, which connects the drive coil and / or the vibrating voice coil and introduces an external electrical signal to the drive coil and / or the vibrating voice coil.

11. The multifunctional sound-generating device according to claim 10, characterized in that, The conductive component includes a first conductive component and a second conductive component. One end of the first conductive component is fixed to the drive coil and forms an electrical connection, and the other end extends to the outside of the housing for connecting to external devices. One end of the second conductive component is fixed to the vibrating voice coil and forms an electrical connection, and the other end extends to the outside of the housing for connecting to external devices.

Images