Multifunctional sound production device

Abstract

A multifunctional sound production device, comprising a housing having an accommodating space, a sound production unit accommodated in the accommodating space, and a driving coil elastically supported in the accommodating space. The sound production unit comprises a frame fixed to the housing, and a vibration system and a magnetic circuit system which are respectively located on two opposite sides of the frame, the magnetic circuit system being used for driving the vibration system to vibrate so as to produce sounds. The driving coil and the magnetic circuit system are spaced apart from each other and are located within a magnetic field range of the magnetic circuit system; the magnetic circuit system and the housing are spaced apart from each other. The multifunctional sound production device further comprises a first elastic member elastically supporting the magnetic circuit system on the frame, movement directions of the magnetic circuit system and the vibration system facing each other or facing away from each other. The multifunctional sound production device can reduce vibration of the frame and the whole device connected to the frame, so as to weaken the vibration feeling of holding or touching the whole device, thus improving user experience.

Description

Multifunctional sound-generating device Technical Field

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

[0002] With the continuous innovation of small mobile devices, they are becoming increasingly popular among users. The most common examples are mobile phones, tablets, and handheld game consoles. Playback and vibration functions have become basic features in small mobile devices. Therefore, multi-functional sound-generating devices that combine playback and vibration functions are now widely used in small mobile devices.

[0003] The multifunctional sound-generating device mainly includes a housing, sound-generating units and drive coils fixed inside the housing; wherein, the sound-generating unit includes a frame fixed inside the housing, a vibration system fixed to the frame and a magnetic circuit system for driving the vibration system to vibrate, the magnetic circuit system being used to drive the vibration system to vibrate; the drive coil and the magnetic circuit system are spaced apart.

[0004] In related technologies, since the magnetic circuit system of the multi-functional sound-generating device needs to be fixed to the frame, it will not be subjected to any force that can be offset when the vibration system vibrates. At this time, the frame of the multi-functional sound-generating device and the whole machine connected to the frame will vibrate strongly, resulting in a strong vibration when holding or touching the whole machine, ultimately leading to a poor user experience. Technical issues

[0005] The purpose of this invention is to provide a multifunctional sound-generating device to solve the problem in related technologies where the frame of the multifunctional sound-generating device and the whole machine connected to the frame will vibrate strongly, resulting in a strong vibration when held or in contact with the whole machine, ultimately leading to a poor user experience. Technical solutions

[0006] To achieve the above objectives, this utility model provides a multifunctional sound-generating device, comprising a housing with a receiving space, a sound-generating unit housed within the receiving space, and a drive coil elastically supported within the receiving space; the sound-generating unit includes a frame fixed to the housing, a vibration system and a magnetic circuit system respectively located on opposite sides of the frame, the magnetic circuit system being used to drive the vibration system to vibrate and generate sound; the vibration system vibrates along a first direction; the drive coil is spaced apart from the magnetic circuit system and located within the magnetic field range of the magnetic circuit system; the drive coil interacts with the magnetic circuit system to drive the drive coil to move in a plane perpendicular to the first direction;

[0007] The magnetic circuit system is spaced apart from the outer shell. The multifunctional sound-generating device also includes a first elastic member that elastically supports the magnetic circuit system on the frame. The first elastic member elastically supports the magnetic circuit system to move along the first direction. The directions of movement of the magnetic circuit system and the vibration system are opposite to each other.

[0008] Preferably, the first elastic element is made of silicone rubber or foam material.

[0009] Preferably, the first elastic element is block-shaped, arc-shaped, or bent.

[0010] Preferably, the magnetic circuit system includes a lower clamping plate, a main magnetic part stacked and fixed to the lower clamping plate, and a secondary magnetic part stacked and fixed to the lower clamping plate and spaced apart from the main magnetic part; the first elastic member is fixed between the secondary magnetic part and the basin frame.

[0011] Preferably, the multifunctional sound-generating device further includes a fixing member connecting the basin frame and the first elastic member. The fixing member includes a support portion fixed to the basin frame and a bent portion formed by bending and extending the support portion near the end of the first elastic member. The first elastic member is clamped and fixed between the auxiliary magnet portion and the bent portion.

[0012] Preferably, the fixing members include at least two; the multifunctional sound-generating device further includes a connector connecting adjacent fixing members, the connector and at least two fixing members forming a ring structure, and the magnetic circuit system is disposed within the ring structure.

[0013] Preferably, the multifunctional sound-generating device further includes a first elastic pad clamped and fixed to the side of the magnetic circuit system away from the vibration system and the side of the housing close to the magnetic circuit system.

[0014] Preferably, the multifunctional sound-generating device further includes a second elastic pad clamped and fixed to the side of the vibration system away from the magnetic circuit system and the side of the housing close to the vibration system.

[0015] Preferably, the multifunctional sound-generating device further includes a second elastic element that elastically supports the drive coil. The second elastic element includes two fixed arms fixed to opposite sides of the housing, a base plate suspended on the side of the magnetic circuit system away from the vibration system, and two elastic arms extending from the two fixed arms to opposite sides of the base plate and forming a fixed connection with the base plate. The base plate and the magnetic circuit system are spaced apart along the first direction. The drive coil is fixed to the base plate and is opposite to and spaced apart from the magnetic circuit system.

[0016] Preferably, the multifunctional sound-generating device further includes a mass block fixed to the base plate on the side near the magnetic circuit system, and the mass block is spaced apart from the outer shell, the frame, and the magnetic circuit system. Beneficial effects

[0017] Compared with related technologies, the multifunctional sound-generating device of this utility model elastically supports the magnetic circuit system on the frame through the first elastic element, and limits the movement direction of the magnetic circuit system and the vibration system to be opposite to each other. In this way, when the vibration system vibrates, the vibration of the magnetic circuit system can cancel the bass vibration of the vibration system, thereby reducing the vibration of the frame and the whole machine connected to the frame, reducing the vibration felt when holding or touching the whole machine, and thus improving the user experience. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0019] Figure 1 is a three-dimensional structural diagram of the multifunctional sound-generating device provided in an embodiment of the present invention;

[0020] Figure 2 is a partial exploded view of the multifunctional sound-generating device provided in an embodiment of this utility model;

[0021] Figure 3 is a cross-sectional view along line AA in Figure 1;

[0022] Figure 4 is a cross-sectional view along line BB in Figure 1.

[0023] In the diagram, 100 is a multifunctional sound-generating device; 1 is the outer shell; 11 is the top cover; 111 is the sound guide channel; 112 is the support wall; 12 is the bottom cover; 2 is the sound-generating unit; 21 is the frame; 22 is the vibration system; 221 is the diaphragm; 2211 is the first surround; 2212 is the second surround; 2213 is the first fixing part; 2214 is the vibrating part; 2215 is the second fixing part; 222 is the voice coil; 223 is the elastic support; 2231 is the first flexible circuit board; 224 is the frame; 23 is the magnetic circuit system; 231 is the lower clamping plate; 23 2. Main magnetic section; 2321. Main magnet; 2322. Upper clamping plate; 2323. Central magnet; 233. Secondary magnetic section; 2331. Secondary magnet; 2332. Magnetic guide plate; 3. Drive coil; 31. Second flexible circuit board; 4. First elastic element; 5. Fixing element; 51. Support part; 52. Bending part; 53. Connecting element; 6. First elastic gasket; 7. Second elastic gasket; 8. Second elastic element; 81. Fixing arm; 82. Base plate; 83. Elastic arm; 9. Mass block; 10. Front cavity; 20. Front acoustic cavity; 30. Rear cavity. Embodiments of the present invention

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] This utility model embodiment provides a multifunctional sound-generating device 100, as shown in Figures 1 to 4, which includes a housing 1 with a receiving space, a sound-generating unit 2 housed in the receiving space, and a drive coil 3 elastically supported in the receiving space.

[0026] The multifunctional sound-generating device 100 is rectangular. Of course, depending on actual needs, the multifunctional sound-generating device 100 can also be designed in other shapes, such as circular, trapezoidal, elliptical, etc.

[0027] The housing includes an upper cover 11 and a lower cover 12 that covers the upper cover 11 and together encloses the housing space.

[0028] The sound-emitting unit 2 and the upper cover 11 are spaced apart and together form a front sound cavity 20; the upper cover 11 is provided with a sound guiding channel 111 that passes through it, the sound guiding channel 111 connects the front sound cavity 20 with the outside world, and together with the front sound cavity 20, forms a front cavity 10; the sound-emitting unit 2, together with the upper cover 11 and the lower cover 12, respectively, forms a rear cavity 30.

[0029] The sound-generating unit 2 includes a frame 21 fixed to the outer shell 1, a vibration system 22 and a magnetic circuit system 23 located on opposite sides of the frame 21, the magnetic circuit system 23 being spaced apart from the outer shell 1, the magnetic circuit system 23 being used to drive the vibration system 22 to vibrate and generate sound, the vibration system 22 vibrating along the first direction X; the drive coil 3 being spaced apart from the magnetic circuit system 23 and located within the magnetic field range of the magnetic circuit system 23, the drive coil 3 interacting with the magnetic circuit system 23 to drive the drive coil 3 to move in a plane perpendicular to the first direction X.

[0030] The upper cover 11 is provided with a support wall 112 extending in the direction of the lower cover 12, and the basin stand 21 is fixed to the support wall.

[0031] The vibration system 22 includes a diaphragm 221 fixed to the side of the frame 21 away from the magnetic circuit system 23 and a voice coil 222 fixed to the side of the diaphragm 221 close to the magnetic circuit system 23 and used to drive the diaphragm 221 to vibrate and produce sound.

[0032] In this embodiment, the diaphragm 221 includes a first folded ring 2211 and a second folded ring 2212 that are annular and spaced apart from each other, a first fixing part 2213 that extends from the outer periphery of the first folded ring 2211 toward the basin frame 21 and is fixed to the basin frame 21, a vibrating part 2214 that extends from the inner periphery of the first folded ring 2211 toward the second folded ring 2212 and is fixed to the outer periphery of the second folded ring 2212, and a second fixing part 2215 that is fixedly connected to the inner periphery of the second folded ring 2212.

[0033] The vibration system 22 also includes an elastic support 223 and a ring-shaped frame 224. The elastic support 223 includes two members, which are respectively located on opposite sides of the frame 21. The elastic support 223 serves as a first flexible circuit board 2231 and is electrically connected to the voice coil 222. One end of each elastic support 223 is fixed to the frame 21, and the other end is fixed to the frame 224. The frame 224 is attached to the vibrating part 2214 fixed to the diaphragm 221. The inner side of the frame 224 extends toward the voice coil 222 and forms a fixed connection with the voice coil 222.

[0034] The magnetic circuit system 23 includes a lower clamping plate 231, a main magnetic part 232 stacked and fixed to the lower clamping plate 231, and a secondary magnetic part 233 stacked and fixed to the lower clamping plate 231 and spaced apart from the main magnetic part 232; the drive coil 3 is respectively positioned opposite to and spaced apart from the main magnetic part 232 and the secondary magnetic part 233 in the first direction X, and the first elastic member 4 is fixed between the secondary magnetic part 233 and the frame 21. The secondary magnetic part 233 and the main magnetic part 232 form a magnetic gap, and the voice coil 222 is inserted and suspended in the magnetic gap.

[0035] In this embodiment, the main magnetic part 232 includes a main magnet 2321 stacked and fixed to the lower clamping plate 231, an upper clamping plate 2322 stacked and fixed to the side of the main magnet 2321 away from the lower clamping plate 231, and a central magnet 2323 stacked and fixed to the side of the upper clamping plate 2322 away from the main magnet 2321.

[0036] The auxiliary magnet 233 includes an auxiliary magnet 2331 stacked and fixed to the lower clamping plate 231 and spaced apart from the main magnet 2321 to form a magnetic gap, and a magnetic guide plate 2332 stacked and fixed to the side of the auxiliary magnet 2331 away from the lower clamping plate 231. The side of the first elastic member 4 away from the basin frame 21 is fixed to the side of the auxiliary magnet 2331 near the basin frame 21 and / or the side of the magnetic guide plate 2332 near the basin frame 21.

[0037] The auxiliary magnet 2331 includes at least one set, and each set of auxiliary magnets 2331 includes two magnets, which are respectively located on opposite sides of the main magnet 2321.

[0038] In this embodiment, the auxiliary magnets 2331 include two sets, namely, four auxiliary magnets 2331 are respectively disposed around the main magnet 2321 and spaced apart from each other, and the two opposite auxiliary magnets 2331 are stacked and fixed to the lower clamping plate 231; the magnetic guide plate 2332 is in the shape of a ring and is stacked and fixed to the side of the four auxiliary magnets 2331 away from the lower clamping plate 231; the side of the first elastic member 4 away from the basin frame 21 is fixed to the side of the auxiliary magnets 2331 near the basin frame 21 and the side of the magnetic guide plate 2332 near the basin frame 21, at which time the other two opposite auxiliary magnets 2331 are fixed to the magnetic guide plate 2332, which is equivalent to being indirectly fixed to the basin frame 21 through the magnetic guide plate 2332; the first elastic member 4 includes two and is respectively disposed on opposite sides of the basin frame 21, and the side of each first elastic member 4 away from the basin frame 21 is fixed to the auxiliary magnet 2331 and the magnetic guide plate 2332.

[0039] The first elastic element 4 is made of an elastic material such as silicone rubber or foam.

[0040] The first elastic element 4 can be block-shaped, arc-shaped, or bent. A bent element means that the first elastic element itself includes at least one bend; for example, the cross-section of the first elastic element is C-shaped, S-shaped, M-shaped, or N-shaped. Of course, depending on actual needs, the first elastic element 4 can also be designed as rhomboid, elliptical, or trapezoidal. In this embodiment, there are two first elastic elements 4, both of which are block-shaped.

[0041] The multifunctional sound-generating device 100 also includes a fixing member 5 connecting the basin frame 21 and the first elastic member 4. The fixing member 5 includes a support portion 51 fixed to the basin frame 21 and a bent portion 52 formed by bending and extending the support portion 51 near the end of the first elastic member 4. The first elastic member 4 is fixed between the auxiliary magnet portion 233 and the bent portion 52. This design is equivalent to indirectly fixing the side of the first elastic member 4 away from the auxiliary magnet portion 233 to the basin frame 21.

[0042] The fixing element 5 includes at least two; the multifunctional sound-generating device 100 also includes a connector 53 connecting adjacent fixing elements 5, the connector 53 and at least two fixing elements 5 forming a ring structure, and the magnetic circuit system 23 is disposed within the ring structure. This design can improve the stability of the fixing elements 5.

[0043] In this embodiment, there are two fixing members 5 and two connecting members 53, which means that the number of connecting members 53 is the same as the number of fixing members 5. The two ends of each connecting member 53 are respectively connected to the ends of the bent portions 52 in the two fixing members 5 located on the same side of the magnetic circuit system. Of course, depending on actual needs, the fixing members 5 can also be designed as three, four, or five, etc. In addition, they can also be designed as an integral ring structure.

[0044] The multifunctional sound-generating device 100 also includes a first elastic pad 6 clamped and fixed to the side of the magnetic circuit system 23 away from the vibration system 22 and the side of the outer shell 1 near the magnetic circuit system 23. Specifically, the first elastic pad 6 is clamped and fixed to the side of the lower clamping plate 231 away from the vibration system 22 and the side of the lower cover 12 near the magnetic circuit system 23. This design can prevent the magnetic circuit system 23 from falling and failing. The multifunctional sound-generating device 100 may also include a second elastic pad 7 clamped and fixed to the side of the vibration system 22 away from the magnetic circuit system 23 and the side of the outer shell 1 near the vibration system 22. Specifically, the second elastic pad 7 is clamped and fixed to the side of the second fixing part 2215 in the diaphragm 221 away from the magnetic circuit system 23 and the side of the upper cover 11 near the vibration system 22. This design further prevents the magnetic circuit system 23 from falling and failing. Specifically, it avoids the magnetic circuit system 23 from vibrating and impacting the upper cover 11 or lower cover 12, which could damage the upper cover 11 or lower cover 12. At the same time, the magnetic circuit system will squeeze the first elastic pad and the second elastic pad when vibrating, which improves the reliability of the magnetic circuit system when it is suspended in the shell and vibrates, and avoids the possibility of the magnetic circuit system falling and failing when vibrating.

[0045] The multifunctional sound-generating device 100 also includes a second elastic element 8 that elastically supports the drive coil 3. The second elastic element 8 includes two fixed arms 81 fixed to opposite sides of the housing 1, a base plate 82 suspended on the side of the magnetic circuit system 23 away from the vibration system 22, and two spring arms 83 extending from the two fixed arms 81 to opposite sides of the base plate 82 and fixedly connected to the base plate 82. The two spring arms 83 are located on opposite sides of the base plate 82. In this embodiment, the two fixed arms 81 and the two spring arms 83 of the second elastic element 8 are located on different sides of the base plate 82. The base plate 82 and the magnetic circuit system 23 are spaced apart along a first direction; the drive coil 3 is fixed to the base plate 82 and is directly opposite and spaced apart from the magnetic circuit system 23. This design securely and elastically supports the drive coil 3 within the receiving space.

[0046] The multifunctional sound-generating device 100 also includes a mass block 9 fixed to the side of the base plate 82 near the magnetic circuit system 23. The mass block 9 is spaced apart from the outer shell 1, the frame 21, and the magnetic circuit system 23. This design increases the mass of the base plate 82, thereby enhancing the vibration sensation when the drive coil 3 vibrates.

[0047] In this embodiment, there are two drive coils 3, which are fixed to the base plate 82 on the side near the magnetic circuit system 23. The two drive coils 3 are spaced apart and are respectively located on opposite sides of the lower clamping plate 231. There are two mass blocks 9, which are respectively located on the other opposite sides of the lower clamping plate 231.

[0048] The multifunctional sound-generating device 100 also includes a second flexible circuit board 31, which is electrically connected to two drive coils 3 and extends outward through the housing 1.

[0049] Compared with related technologies, the multifunctional sound-generating device 100 of this embodiment elastically supports the magnetic circuit system 23 on the frame 21 through the first elastic member 4, and limits the movement directions of the magnetic circuit system 23 and the vibration system 22 to be opposite to each other. In this way, when the vibration system 22 vibrates, the vibration of the magnetic circuit system 23 can cancel the bass vibration of the vibration system 22, thereby reducing the vibration of the frame 21 and the whole machine connected to the frame 21, reducing the vibration of the hand or the whole machine, and thus improving the user experience.

[0050] The above description is merely an embodiment of this utility model. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this utility model, but these improvements all fall within the protection scope of this utility model.

Claims

1. A multifunctional sound-generating device, comprising a housing having a receiving space, a sound-generating unit housed within the receiving space, and a drive coil elastically supported within the receiving space; the sound-generating unit includes a frame fixed to the housing, a vibration system and a magnetic circuit system respectively located on opposite sides of the frame, the magnetic circuit system being used to drive the vibration system to vibrate and generate sound; the vibration system vibrates along a first direction; the drive coil is spaced apart from the magnetic circuit system and located within the magnetic field range of the magnetic circuit system; the drive coil interacts with the magnetic circuit system to drive the drive coil to move in a plane perpendicular to the first direction; characterized in that, The magnetic circuit system is spaced apart from the outer shell. The multifunctional sound-generating device also includes a first elastic member that elastically supports the magnetic circuit system on the frame. The first elastic member elastically supports the magnetic circuit system to move along the first direction. The directions of movement of the magnetic circuit system and the vibration system are opposite to each other.

2. The multifunctional sound-generating device as described in claim 1, characterized in that, The first elastic element is made of silicone rubber or foam material.

3. The multifunctional sound-generating device as described in claim 1, characterized in that, The first elastic element is block-shaped, arc-shaped, or bent.

4. The multifunctional sound-generating device as described in claim 1, characterized in that, The magnetic circuit system includes a lower clamping plate, a main magnetic part stacked and fixed to the lower clamping plate, and a secondary magnetic part stacked and fixed to the lower clamping plate and spaced apart from the main magnetic part; the first elastic member is fixed between the secondary magnetic part and the basin frame.

5. The multifunctional sound-generating device as described in claim 4, characterized in that, The multifunctional sound-generating device further includes a fixing member connecting the basin frame and the first elastic member. The fixing member includes a support portion fixed to the basin frame and a bent portion formed by bending and extending the support portion near the end of the first elastic member. The first elastic member is clamped and fixed between the auxiliary magnet portion and the bent portion.

6. The multifunctional sound-generating device as described in claim 5, characterized in that, The fixing members include at least two; the multifunctional sound-generating device also includes a connector connecting adjacent fixing members, the connector and at least two fixing members forming a ring structure, and the magnetic circuit system is disposed within the ring structure.

7. The multifunctional sound-generating device as described in claim 1, characterized in that, The multifunctional sound-generating device also includes a first elastic pad clamped and fixed on the side of the magnetic circuit system away from the vibration system and on the side of the housing close to the magnetic circuit system.

8. The multifunctional sound-generating device as described in claim 7, characterized in that, The multifunctional sound-generating device also includes a second elastic pad clamped and fixed on the side of the vibration system away from the magnetic circuit system and on the side of the housing close to the vibration system.

9. The multifunctional sound-generating device as described in claim 1, characterized in that, The multifunctional sound-generating device further includes a second elastic element that elastically supports the drive coil. The second elastic element includes two fixed arms fixed to opposite sides of the housing, a base plate suspended on the side of the magnetic circuit system away from the vibration system, and two elastic arms extending from the two fixed arms to opposite sides of the base plate and forming a fixed connection with the base plate. The base plate and the magnetic circuit system are spaced apart along the first direction. The drive coil is fixed to the base plate and is opposite to and spaced apart from the magnetic circuit system.

10. The multifunctional sound-generating device as described in claim 9, characterized in that, The multifunctional sound-generating device also includes a mass block fixed to the base plate near the magnetic circuit system, and the mass block is spaced apart from the outer shell, the basket frame and the magnetic circuit system.

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