Multifunctional sound production device

Abstract

The invention provides a multifunctional sound production device. The multifunctional sound production device comprises a shell, a sound outlet hole penetrating through the shell, a vibration assembly accommodated in the shell, a driving coil for driving the vibration assembly to vibrate and an elastic supporting piece, the vibration assembly comprises a sound production single body and driving magnetic steel. The single sounding body comprises a basin stand, and a vibration part and a magnetic circuit part which are respectively fixed on the basin stand, and the magnetic circuit part is provided with a through hole penetrating through the magnetic circuit part; the magnetic steel assembly is fixed to the magnetic circuit component and located in the through hole. The drive coil is fixed to the shell and located in the through hole. The number of the elastic supporting pieces is two, and each elastic supporting piece is of a linear structure. According to the multifunctional sound production device provided by the invention, the processing of the elastic supporting piece is simple, the forming is easy, and the position space for arranging the elastic supporting piece of the multifunctional sound production device can be saved, so that the space utilization rate of the multifunctional sound production device is improved, and the performance of the multifunctional sound production device is better.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration motors, and in particular to a multifunctional sound-generating device. Background Art

[0002] With the continuous innovation of smart mobile devices, they are becoming more and more popular among users. The most common ones are mobile phones, tablet computers, and handheld game consoles. Smart mobile devices with both playback and vibration functions are even more popular among users. Therefore, multifunctional sound-generating devices with both playback and vibration functions are now widely used in smart mobile devices.

[0003] The multifunctional sound-producing device mainly includes a shell, a vibration component housed in the shell, a driving coil for driving the vibration component to vibrate, and an elastic member that elastically supports the vibration component in the shell, wherein the vibration component includes a sound-producing unit for playing sound and a magnetic steel component for providing a vibration force perpendicular to the vibration direction of the sound-producing unit, and the sound-producing unit mainly includes a basin frame, vibration components respectively fixed to the basin frame, and a magnetic circuit component that drives the vibration components to vibrate and produce sound.

[0004] In the related art, the elastic part of the elastic support member is designed as a bending structure to provide better elastic supporting force for the vibration component. Although this design method can provide better elastic supporting force for the vibration component, it is complicated to process and difficult to form. The bending structure also occupies the internal space of the shell, resulting in low space utilization of the multi-functional sound-emitting device.

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

[0006] The purpose of the present invention is to provide a multifunctional sound-emitting device to solve the problem in the related art that the elastic support parts of the multifunctional sound-emitting device are not only complicated to process and difficult to form, but also occupy the internal space of the shell, resulting in low space utilization of the multifunctional sound-emitting device.

[0007] To achieve the above-mentioned object, the present invention provides a multifunctional sound-generating device, comprising a housing, a sound outlet extending through the housing, a vibration assembly housed within the housing, a drive coil fixed within the housing and driving the vibration assembly to vibrate, and an elastic support member elastically suspending the vibration assembly within the housing; the vibration assembly comprises a sound-generating unit and a drive magnet;

[0008] The sound-generating unit includes a basin frame, a vibration component fixed to the basin frame, and a magnetic circuit component that drives the vibration component to vibrate along a first direction to generate sound, and the magnetic circuit component is provided with a through hole penetrating therethrough along the first direction;

[0009] The driving magnet is fixed to the magnetic circuit component and is located in the through hole. The driving coil is fixed to the housing and is located in the through hole. The driving coil is spaced apart and arranged opposite to the driving magnet and drives the vibration assembly to vibrate in a second direction perpendicular to the first direction.

[0010] The elastic support members include two and both are in a straight line structure. The two elastic support members are respectively located on opposite sides of the vibration component along the second direction. The two ends of each elastic support member are respectively fixed to the housing and the vibration component.

[0011] Preferably, the vibration component also includes a magnetic bowl assembly fixed to the side of the magnetic circuit component away from the vibration component; the magnetic bowl assembly includes a magnetic bowl body fixed to the magnetic circuit component, and two fixed parts bent and extended from one group of diagonal positions of the magnetic bowl body toward the direction of the vibration component; the two elastic support members are respectively fixed to the two fixed parts.

[0012] Preferably, the magnetic bowl assembly is provided with an avoidance hole penetrating therethrough along the first direction for avoiding the driving coil and the driving magnet, and the avoidance hole is communicated with the through hole.

[0013] Preferably, each of the elastic support members includes an I-shaped elastic arm, a first fitting portion fixed to one end of the elastic arm close to the shell and fitted and fixed to the shell, and a second fitting portion fixed to one side of the elastic arm close to the vibration component and fitted and fixed to the fixed portion on the corresponding side.

[0014] Preferably, the elastic support member is made of SUS301 material.

[0015] Preferably, the ratio of the length to the width of the elastic support member is 4-8.

[0016] Preferably, the shell is rectangular; the two elastic support members are respectively arranged on the two short axis sides of the shell and are centrally symmetrical, and the ratio of the length of each elastic support member to the short axis length of the shell is 0.8 to 0.9; the ratio of the width of each elastic support member to the height of the shell is 0.5 to 0.8.

[0017] Preferably, the magnetic circuit component includes a main magnet provided with the through hole and a secondary magnet surrounding the outer circumference of the main magnet, the secondary magnet and the main magnet are separated to form a magnetic gap, and the secondary magnet and the main magnet are both stacked and fixed on the magnetic bowl body.

[0018] Preferably, the magnetic bowl assembly further includes a limiting ring block fixed to a side of the magnetic bowl body close to the vibration component, the limiting ring blocks are spaced around the periphery of the secondary magnet, and the projections of the limiting ring block and the secondary magnet on a plane parallel to the first direction at least partially overlap.

[0019] Preferably, the main magnet is rectangular and is formed by four sub-magnets, and the auxiliary magnets include four and are respectively arranged on the four sides of the main magnet; the magnetic circuit component also includes four auxiliary pole cores, and the four auxiliary pole cores are respectively stacked and fixed on the side of the four auxiliary magnets away from the magnetic bowl body, and the four auxiliary pole cores extend to the basin frame on the side close to the basin frame and form a fixed connection with the basin frame.

[0020] Preferably, the driving magnetic steels include two, and the two driving magnetic steels are respectively fixed to the two opposite inner sides of the main magnetic steel along a third direction and are arranged opposite to each other, and the third direction is perpendicular to the first direction and the second direction.

[0021] Preferably, the multifunctional sound-generating device further comprises an iron core fixed to the housing and located in the through hole, and the driving coil is wound around the outer circumference of the iron core.

[0022] Compared with the related art, the multifunctional sound-emitting device of the present invention elastically suspends the vibration component in the shell by adopting an I-shaped elastic support member. This not only makes the processing of the elastic support member simple and easy to shape, but also saves the position space for setting the elastic support member in the multifunctional sound-emitting device, so as to improve the space utilization rate of the multifunctional sound-emitting device, thereby making its performance better; in addition, by limiting the ratio of the length to the width of the elastic support member to 4 to 8, limiting the two elastic support members to be respectively arranged on the two short axis sides of the shell and in a central symmetry, the ratio of the length of each elastic support member to the short axis length of the shell is 0.8 to 0.9, and the ratio of the width of each elastic support member to the height of the shell is 0.5 to 0.8, thereby limiting the displacement of the vibration component along the first direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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:

[0024] Figure 1 A schematic diagram of the three-dimensional structure of a multifunctional sound-generating device provided in an embodiment of the present invention;

[0025] Figure 2A partial structural exploded view of a multifunctional sound-generating device provided by an embodiment of the present invention;

[0026] Figure 3 An exploded view of another portion of the structure of the multifunctional sound-generating device provided by an embodiment of the present invention;

[0027] Figure 4 for Figure 1 AA line cross-sectional view;

[0028] Figure 5 A partially exploded side view of the multifunctional sound-generating device provided by an embodiment of the present invention.

[0029] In the figure, 100 is a multifunctional sound-emitting device; 1 is a shell; 10 is a sound outlet; 11 is a bottom plate; 12 is an upper cover; 2 is a vibration component; 21 is a sound-emitting unit; 211 is a basin frame; 212 is a vibration component; 2121 is a diaphragm; 2122 is a voice coil; 2123 is an elastic member; 213 is a magnetic circuit component; 2130 is a through hole; 2131 is a main magnet; 21311 is a sub-magnet; 2132 is a secondary magnet; 21320 is a magnetic gap; 2133 is an upper splint; 2134 is a secondary pole core; 22 is a driving magnet; 23 is a magnetic bowl assembly; 231 is a magnetic bowl body; 232 is a fixing part; 233 is a limiting ring block; 3 is a driving coil; 4 is an elastic support member; 41 is an elastic arm; 42 is a first fitting part; 43 is a second fitting part; 5 is an iron core; 6 is an elastic sealing membrane; 7 is a flexible circuit board. DETAILED DESCRIPTION

[0030] 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.

[0031] The embodiment of the present invention provides a multifunctional sound-generating device 100, which is combined with Figures 1 to 5 As shown, it includes a shell 1, a sound outlet 10 passing through the shell 1, a vibration component 2 accommodated in the shell 1, a driving coil 3 fixed in the shell 1 and driving the vibration component 2 to vibrate, and an elastic support member 4 elastically suspending the vibration component 2 in the shell 1. The vibration component 2 includes a sound-emitting unit 21 and a driving magnet 22.

[0032] The multifunctional sound-generating device 100 is rectangular; the housing 1 is rectangular and includes a bottom plate 11 covering and fixing the top cover 12 on the bottom plate 11 and forming a receiving space together with the bottom plate 11; the vibration component 2 and the driving coil 3 are both located in the receiving space.

[0033] The sound unit 21 includes a frame 211, a vibration component 212 fixed to the frame 211, and a magnetic circuit component 213 driving the vibration component 212 to vibrate along a first direction to generate sound. The magnetic circuit component 213 is provided with a through hole 2130 passing through it along the first direction.

[0034] The driving magnet 22 is fixed to the magnetic circuit component 213 and is located in the through hole 2130. The driving coil 3 is fixed to the housing 1 and is located in the through hole 2130. The driving coil 3 is spaced apart from the driving magnet 22 and drives the vibration component 2 to vibrate in a second direction perpendicular to the first direction. The first direction is Figure 1 The Z direction is Figure 1 The X-axis direction is the following third direction: Figure 1 In the Y-axis direction, the third direction, the second direction and the first direction are perpendicular to each other.

[0035] The vibration component 212 includes a diaphragm 2121 fixed to the basin frame 211 and a voice coil 2122 fixed to the side of the diaphragm 2121 close to the magnetic circuit component 213. The voice coil 2122 is used to drive the diaphragm 2121 to vibrate; the diaphragm 2121 is arranged to be opposite to the sound outlet 10.

[0036] The vibration component 212 also includes an elastic member 2123, one end of which is fixed to the basin frame 211 and the other end is fixed to the voice coil 2122. In this embodiment, the elastic members 2123 include two and are respectively arranged on opposite sides of the basin frame 211, and at least one of them is made of a flexible conductive material and extends outside the housing 1 to connect the voice coil 2122 to electrical energy.

[0037] The magnetic circuit component 213 includes a main magnet 2131 with a through hole 2130 and a secondary magnet 2132 surrounding the outer circumference of the main magnet 2131. The secondary magnet 2132 and the main magnet 2131 are separated to form a magnetic gap 21320 and are respectively stacked and fixed on the side of the magnetic bowl body 231 below close to the vibration component 212; the voice coil 2122 is inserted and suspended in the magnetic gap 21320.

[0038] In this embodiment, the main magnet 2131 is formed by four sub-magnets 21311, and the space formed by the four sub-magnets 21311 is the through hole 2130. Of course, the main magnet 2131 can also be a one-piece structure, in which case the through hole 2130 is formed from one side of the main magnet 2131 close to the vibrating component 212 to the other side.

[0039] The secondary magnetic steel 2132 can be designed as a ring or multiple spaced apart. In this embodiment, the secondary magnetic steel 2132 includes four and is respectively arranged on the four sides of the main magnetic steel 2131. Specifically, the four secondary magnetic steels 2132 are respectively arranged on the outside of the main magnetic steel 2131 away from the through hole 2130.

[0040] The magnetic circuit component 213 further includes an upper clamping plate 2133 that is annular and stacked and fixed on a side of the main magnet 2131 close to the vibration component.

[0041] The magnetic circuit component 213 also includes four secondary pole cores 2134, which are stacked and fixed on the side of the four secondary magnets 2132 away from the lower magnetic bowl body 231. The four secondary pole cores 2134 extend to the basin frame 211 on the side close to the basin frame 211 and form a fixed connection with the basin frame 211. This design can improve the performance of the magnetic circuit component 213. In other embodiments, the four secondary pole cores 2134 can also be integrally formed with the basin frame 211.

[0042] The two driving magnets 22 are fixed to opposite inner sides of the main magnet 2131 along the third direction and arranged in a facing relationship. The two driving magnets 22 are respectively arranged on the two longitudinal axis sides of the housing 1. In this embodiment, each driving magnet 22 is a single-piece structure. Of course, each driving magnet 22 can also be formed by three small magnets stacked in sequence along the X-axis.

[0043] Vibration assembly 2 also includes a magnetic bowl assembly 23 fixed to the side of magnetic circuit component 213 away from vibration component 212. Magnetic bowl assembly 23 includes a magnetic bowl body 231 fixed to magnetic circuit component 213, and two fixing portions 232 extending from a pair of diagonal positions of magnetic bowl body 231 toward vibration component 212. Two elastic support members 4 are fixed to the two fixing portions 232 at their respective ends away from housing 1. Magnetic bowl assembly 23 increases the weight of vibration assembly 2, thereby enhancing its vibration effect, while also facilitating the fixing of elastic support members 4.

[0044] The magnetic bowl assembly 23 is provided with an avoidance hole (not shown) penetrating therethrough along the first direction for avoiding the driving coil 3 and the driving magnet 22 . The avoidance hole is communicated with the through hole 2130 .

[0045] The magnetic bowl assembly 23 also includes a retaining ring block 233 fixed to the side of the magnetic bowl body 231 near the vibrating component 212. The retaining ring blocks 233 are spaced apart and surround the periphery of the secondary magnet 2132. The projections of the retaining ring blocks 233 and the secondary magnet 2132 on a plane parallel to the first direction at least partially overlap. This design, because the retaining ring blocks 233 are located on the periphery of the secondary magnet 2132, can limit the position of the secondary magnet 2132, improving assembly efficiency while further reducing the weight of the vibrating assembly 2. In addition, a reinforcement portion (not shown) that matches the fixing portion 232 can also be provided at the position of the retaining ring block 233 corresponding to the fixing portion 232, thereby enhancing the structural strength of the fixing portion 232.

[0046] The two elastic support members 4 are respectively located on opposite sides of the vibration assembly 2 along the second direction. The two ends of each elastic support member 4 are respectively fixed to the inner side of the peripheral wall of the upper cover 12 of the housing 1 and the fixing portion 232.

[0047] The two elastic support members 4 are respectively arranged on the two short axis sides of the housing 1 and are centrally symmetrical. This design allows the elastic support members 4 to more stably elastically support the vibration component 2 in the housing 1.

[0048] The elastic support member 4 is made of SUS301 material, and the ratio of the length L to the width W of the elastic support member 4 is 4 to 8. This design can improve the strength of the elastic support member 4 and prevent it from being damaged when providing elasticity.

[0049] The ratio of the length L of each elastic support member 4 to the minor axis length L1 of the housing 1 is 0.8 to 0.9; the ratio of the width W of each elastic support member 4 to the height H of the housing 1 is 0.5 to 0.8. This design ensures the strength of the elastic support members 4 without occupying too much internal space of the housing 1.

[0050] The elastic support member 4 includes a straight-line elastic arm 41, a first fitting portion 42 fixed to one end of the elastic arm 41 near the housing 1 and affixed to the housing 1, and a second fitting portion 43 fixed to one side of the elastic arm 41 near the vibration assembly 2 and affixed to the fixing portion 232 on the corresponding side. This design allows the elastic support member 4 to be more stably fixed to the housing 1 and the vibration assembly 2.

[0051] The multifunctional sound-generating device 100 further includes an iron core 5 fixed to the bottom plate 11 of the housing 1 and positioned within the through hole 2130. The iron core 5 is spaced apart from the two drive magnets 22. The drive coil 3 is wound around the outer periphery of the iron core 5. This design facilitates the securing of the drive coil 3.

[0052] The multifunctional sound-generating device 100 further includes a flexible circuit board 7 fixed to the bottom plate 11 and extending outside the housing 1 . The flexible circuit board 7 is electrically connected to the driving coil 3 to provide the driving coil 3 with electrical energy.

[0053] The multifunctional sound-producing device 100 further includes an elastic sealing membrane 6 fixed to the side of the housing 1 near the sound-producing unit 21 and arranged around the sound-producing hole 10. The side of the elastic sealing membrane 6 facing away from the housing 1 is fixed to the side of the diaphragm 2121 facing away from the basin frame 211. This design effectively seals the space within the housing 1 and provides a damping effect for the vibration assembly 2 along the vibration direction of the vibrating component 212, preventing the vibration assembly 2 from colliding with the upper cover 12.

[0054] In the multifunctional sound-emitting device 100 of this embodiment, the first-order mode of the vibration component 2 is 80 to 300 Hz, and the second-order mode is 3.5 to 8 times the first-order mode, that is, the second-order mode frequency of the vibration component 2 is higher and is far away from the low-frequency resonance point of the sound-emitting unit 21, so as to reduce the resonance of the vibration component 2 along the vibration direction perpendicular to the vibration component 212, and at the same time reduce the influence of the mode of the vibration component 2 on the sound-emitting unit 21, and the K value of the vibration component 2 in the non-X-axis direction is larger, and it is less likely to excite other modes.

[0055] The comparison table of the modes of the related art that does not use the straight-line elastic support member 4 and does not include foam and the modes of the embodiment that uses the straight-line elastic support member 4 is as follows:

[0056]

[0057] This table is a comparison of one embodiment and does not represent a comparison of all embodiments. It can be seen from the table that the second-order mode in the prior art is 2.7 times the first-order mode, while the second-order mode in this embodiment is 5.34 times the first-order mode.

[0058] Compared with related art, the multifunctional sound-generating device 100 of this embodiment uses a straight-line elastic support member 4 to elastically suspend the vibration component 2 within the housing 1. This not only simplifies the processing of the elastic support member 4, making it easy to form and lowering the cost, but also saves space for the elastic support member 4 to be set in the multifunctional sound-generating device 100, thereby improving the space utilization rate of the multifunctional sound-generating device 100 and improving its performance. In addition, as part of the vibration component 2, the sound-generating unit 21 can provide part of the mass of the vibration component 2 to improve the vibration effect of the vibration component 2. In addition, by limiting the length to width ratio of the elastic support member 4 to 4 to 8, limiting the two elastic support members 4 to be respectively arranged on the two short axis sides of the housing 1 and being centrally symmetrical, the ratio of the length of each elastic support member 4 to the short axis length of the housing 1 is 0.8 to 0.9, and the ratio of the width of each elastic support member 4 to the height of the housing 1 is 0.5 to 0.8, thereby limiting the displacement of the vibration component 2 along the first direction.

[0059] 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 multifunctional sound-generating device, comprising a housing, a sound outlet extending through the housing, a vibration assembly housed within the housing, a drive coil secured within the housing and configured to drive the vibration assembly, and an elastic support member elastically suspending the vibration assembly within the housing, the vibration assembly comprising a sound-generating unit and a drive magnet. The sound-generating unit includes a basin frame, a vibration component fixed to the basin frame, and a magnetic circuit component that drives the vibration component to vibrate along a first direction to generate sound, and the magnetic circuit component is provided with a through hole penetrating therethrough along the first direction; The driving magnet is fixed to the magnetic circuit component and is located in the through hole, the driving coil is fixed to the housing and is located in the through hole, the driving coil and the driving magnet are arranged opposite to each other and drive the vibration component to vibrate in a second direction perpendicular to the first direction; characterized in that The elastic support members include two and both are in a straight line structure, the two elastic support members are respectively located on opposite sides of the vibration component along the second direction, and the two ends of each elastic support member are respectively fixed to the housing and the vibration component; The ratio of the length to the width of the elastic support member is 4 to 8; the outer shell is rectangular; the two elastic support members are respectively arranged on the two short axis sides of the outer shell and are centrally symmetrical, and the ratio of the length of each elastic support member to the short axis length of the outer shell is 0.8 to 0.9; the ratio of the width of each elastic support member to the height of the outer shell is 0.5 to 0.

8.

2. The multifunctional sound-generating device according to claim 1, wherein: The vibration component also includes a magnetic bowl component fixed to the side of the magnetic circuit component away from the vibration component; the magnetic bowl assembly includes a magnetic bowl body fixed to the magnetic circuit component, and two fixing parts bent and extended from one group of diagonal positions of the magnetic bowl body toward the direction of the vibration component; the two elastic support members are respectively fixed to the two fixing parts.

3. The multifunctional sound-generating device according to claim 2, wherein: The magnetic bowl assembly is provided with an avoidance hole penetrating therethrough along the first direction for avoiding the driving coil and the driving magnet, and the avoidance hole is communicated with the through hole.

4. The multifunctional sound-generating device according to claim 2, wherein: Each of the elastic support members includes an I-shaped elastic arm, a first fitting portion fixed to one end of the elastic arm close to the shell and fixed to the shell, and a second fitting portion fixed to one side of the elastic arm close to the vibration component and fixed to the fixed portion on the corresponding side.

5. The multifunctional sound-generating device according to claim 1, wherein: The elastic supporting member is made of SUS301 material.

6. The multifunctional sound-generating device according to claim 2, wherein: The magnetic circuit component includes a main magnet provided with the through hole and a secondary magnet surrounding the outer circumference of the main magnet. The secondary magnet and the main magnet are separated to form a magnetic gap. The secondary magnet and the main magnet are both stacked and fixed on the magnetic bowl body.

7. The multifunctional sound-generating device according to claim 6, wherein: The magnetic bowl assembly also includes a limiting ring block fixed to a side of the magnetic bowl body close to the vibration component. The limiting ring blocks are spaced around the periphery of the secondary magnet, and the projections of the limiting ring blocks and the secondary magnet on a plane parallel to the first direction at least partially overlap.

8. The multifunctional sound-generating device according to claim 6, wherein: The main magnet is rectangular and is formed by four sub-magnets. The auxiliary magnets include four and are respectively arranged on the four sides of the main magnet. The magnetic circuit component also includes four auxiliary pole cores, which are respectively stacked and fixed on the side of the four auxiliary magnets away from the magnetic bowl body. The four auxiliary pole cores extend to the basin frame on the side close to the basin frame and are fixedly connected to the basin frame.

9. The multifunctional sound-generating device according to claim 6, wherein: The two driving magnetic steels are respectively fixed to two opposite inner sides of the main magnetic steel and arranged opposite to each other along a third direction, and the third direction is perpendicular to the first direction and the second direction.

10. The multifunctional sound-generating device according to claim 1, wherein: The multifunctional sound-generating device further includes an iron core fixed to the housing and located in the through hole, and the driving coil is wound around the outer circumference of the iron core.

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