Multifunctional sound production apparatus

Abstract

The present invention provides a multifunctional sound production apparatus, comprising a housing, a vibration unit accommodated in the housing, and a driving coil used for driving the vibration unit to vibrate. The vibration unit comprises a sound production unit and magnetic steel assemblies fixed to the sound production unit. The sound production unit comprises a basket, and a vibration system and a magnetic circuit system which are respectively fixed to the basket. The vibration system comprises a diaphragm fixed to the basket and a voice coil used for driving the diaphragm to vibrate to produce sound. The magnetic circuit system comprises a lower clamping plate, an annular main magnetic steel fixed to the lower clamping plate, and a secondary magnetic steel fixed to the lower clamping plate. The magnetic steel assemblies are fixed to the inner peripheral side of the main magnetic steel; the driving coil is fixed in the housing and located on the inner peripheral side of the main magnetic steel; and the driving coil and the magnetic steel assemblies are arranged at intervals. The multifunctional sound production apparatus in the present invention can integrate the magnetic circuit system and the magnetic steel assemblies, so as to improve the overall mass and driving force of the vibration unit, thereby improving a BL value and vibration sensation of the multifunctional sound production apparatus, and thus improving the performance of the multifunctional sound production apparatus.

Description

Multifunctional sound-generating device Technical Field

[0001] This invention relates to the field of vibration motor technology, and more particularly to a multifunctional sound-generating device. Background Technology

[0002] With the continuous innovation of smart mobile devices, they are becoming increasingly popular among users. The most common examples are mobile phones, tablets, and handheld game consoles. The design of both playback and vibration functions in smart mobile devices has become a basic feature. Therefore, multi-functional sound-generating devices with both playback and vibration functions are now widely used in smart mobile devices.

[0003] The multifunctional sound-generating device mainly includes a housing, a vibrating unit elastically supported within the housing, and a drive coil for driving the vibrating unit to vibrate. The vibrating unit includes a sound-generating unit for playing sound and a magnetic steel assembly for providing a vibrating force perpendicular to the vibration direction of the sound-generating unit. The sound-generating unit mainly includes a vibrating system with a frame fixed to the frame and a magnetic circuit system for driving the vibrating system to vibrate.

[0004] In related technologies, the magnetic circuit system and the magnet assembly of the multi-functional sound-generating device are designed as two separate magnetic circuit structures. This design not only reduces the overall mass of the vibration unit but also makes its driving force insufficient, ultimately resulting in weak vibration and reduced performance of the multi-functional sound-generating device.

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

[0006] The purpose of this invention is to provide a multifunctional sound-generating device to solve the problems in related technologies where the vibration unit of a multifunctional sound-generating device is lightweight and has insufficient driving force, resulting in weak vibration and reduced performance of the multifunctional sound-generating device. Technical solutions

[0007] To achieve the above objectives, the present invention provides a multifunctional sound-generating device, which includes a housing, a vibrating unit housed within the housing, and a drive coil for driving the vibrating unit to vibrate; the vibrating unit includes a sound-generating unit elastically supported by the housing and a magnet assembly fixed to the sound-generating unit.

[0008] The sound-generating unit includes a frame, a vibration system fixed to the frame, and a magnetic circuit system for driving the vibration system to vibrate and generate sound; the vibration system includes a diaphragm fixed to the frame and a voice coil for driving the diaphragm to vibrate and generate sound; the magnetic circuit system includes a lower clamping plate, a main magnet fixed to the lower clamping plate and in an annular shape, and a secondary magnet fixed to the lower clamping plate and located on the outer periphery of the main magnet, the secondary magnet and the main magnet being spaced apart to form a magnetic gap, and the voice coil being inserted and suspended within the magnetic gap;

[0009] The magnet assembly is fixed to the inner circumference of the main magnet, and the drive coil is fixed inside the housing and located on the inner circumference of the main magnet. The drive coil is spaced apart from the magnet assembly and drives the vibration unit to vibrate along a vibration direction perpendicular to the diaphragm.

[0010] Preferably, the magnet assembly includes two sets, which are respectively fixed to the inner circumference of the main magnet. The two sets of magnet assemblies are arranged on opposite sides of the main magnet along the vibration direction of the vibration unit, and the drive coil is located between the two sets of magnet assemblies. Each set of magnet assemblies includes three drive magnets that are spaced apart from each other and arranged side by side along the vibration direction of the vibration unit. The three drive magnets in one set of magnet assemblies correspond one-to-one with the three drive magnets in the other set of magnet assemblies.

[0011] Preferably, the magnetization direction of the main magnet is parallel to the vibration direction of the vibration system; the magnetization direction of all the driving magnets is perpendicular to the magnetization direction of the main magnet, wherein the magnetization direction of the middle driving magnet in one group of magnet assemblies is opposite to the magnetization direction of the middle driving magnet in another group of magnet assemblies, and the magnetization direction of the middle driving magnet in any group of magnet assemblies is the same as the magnetization direction of the driving magnets on both sides in another group of magnet assemblies.

[0012] Preferably, the multifunctional sound-generating device further includes a frame fixed to the housing and located on the inner periphery of the main magnet, the frame being spaced apart from the magnet assembly; the drive coil is wound around the frame.

[0013] Preferably, the surface of the skeleton is provided with an inwardly recessed and annular groove; the drive coil is wound in the groove.

[0014] Preferably, the multifunctional sound-generating device further includes a flexible circuit board fixed inside the housing and electrically connected to the drive coil, with one end of the flexible circuit board away from the drive coil extending outside the housing.

[0015] Preferably, the multifunctional sound-generating device further includes two spring plates, which elastically support the opposite sides of the lower clamping plate against the outer shell.

[0016] Preferably, the main magnet includes four sub-magnets, all of which are fixed to the lower clamping plate. The four sub-magnets are spliced ​​end to end and together form a ring. The auxiliary magnet includes four magnets, which are respectively disposed on the outside of the four sub-magnets.

[0017] Preferably, the magnetic circuit system further includes an upper clamping plate fixed to the side of the four sub-magnets away from the lower clamping plate, and four sub-pole cores integrally formed with the basket frame and respectively stacked on the side of the four sub-magnets away from the lower clamping plate.

[0018] Preferably, the four auxiliary magnets are divided into two opposing first groups of magnets and two opposing second groups of magnets. Each of the two auxiliary magnets in the first group includes a magnet body and a protrusion extending from the central region of the magnet body away from the main magnet. The vibration system also includes two elastic members, each corresponding to one of the two auxiliary magnets in the first group, spaced apart from each other. Each elastic member includes a first fixed arm, a second fixed arm spaced apart and fixed to the voice coil, and two elastic arms that bend and extend from the first fixed arm towards the two second fixed arms and form a fixed connection. The central region of the first fixed arm has a U-shaped groove to avoid the protrusion, and the two elastic arms bend and extend towards the protrusion. One of the elastic members is electrically connected to the voice coil, and the elastic member electrically connected to the voice coil also includes an extension extending from the first fixed arm towards the outer casing, extending beyond the outer casing. Beneficial effects

[0019] Compared with related technologies, the multifunctional sound-generating device of the present invention designs the main magnet into a ring shape, fixes the magnet assembly to the inner circumference of the main magnet, and fixes the drive coil inside the housing, with the drive coil located on the inner circumference of the main magnet. At the same time, the drive coil and the magnet assembly are spaced apart, so that the drive coil drives the vibration unit to vibrate in a vibration direction perpendicular to the diaphragm. In this way, the magnetic circuit system and the magnet assembly can be integrated to improve the overall quality and driving force of the vibration unit, thereby improving the BL value and vibration sensation of the multifunctional sound-generating device and improving its performance. In addition, it can also make the short signal of the multifunctional sound-generating device crisper and save costs. 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 view of the structure 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 schematic diagram of the magnetization of the magnetic circuit system and the magnet assembly in the multifunctional sound-generating device provided in the embodiment of the present invention;

[0026] Figure 6 is a partial structural schematic diagram of the multifunctional sound-generating device provided in an embodiment of the present invention.

[0027] In the diagram, 100 is a multi-functional sound-generating device; 1 is the outer casing; 11 is the first housing; 12 is the second housing; 2 is the vibrating unit; 21 is the sound-generating unit; 211 is the frame; 2111 is the connector; 212 is the vibration system; 2121 is the diaphragm; 2122 is the voice coil; 2123 is the elastic element; 21231 is the first fixed arm; 21232 is the second fixed arm; 21233 is the spring arm; 21234 is the clearance groove; and 21235 is the... 213. Extension section; 2131. Magnetic circuit system; 2132. Lower clamping plate; 2133. Main magnet; 21321. Sub-magnet; 2133. Secondary magnet; 21331. Magnet body; 21332. Protrusion; 2134. Upper clamping plate; 2135. Secondary pole core; 22. Magnet assembly; 221. Drive magnet; 3. Drive coil; 4. Frame; 41. Groove; 5. Flexible circuit board; 6. Spring; 10. Sound outlet; 20. Magnetic gap. Embodiments of the present invention

[0028] 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.

[0029] The present invention provides a multifunctional sound-generating device 100, as shown in Figures 1 to 6, which includes a housing 1, a vibration unit 2 housed in the housing 1, and a drive coil 3 for driving the vibration unit 2 to vibrate.

[0030] The outer shell 1 is rectangular; the outer shell 1 includes a first shell 11 and a second shell 12 covering the first shell 11. The first shell 11 is provided with a sound outlet 10 passing through it. The second shell 12 and the first shell 11 together form a receiving space; the vibration unit 2 is received in the receiving space.

[0031] The vibration unit 2 includes a sound-generating unit 21 elastically supported on the outer shell 1 and a magnet assembly 22 fixed to the sound-generating unit 21.

[0032] The sound-generating unit 21 includes a frame 211, a vibration system 212 fixed on opposite sides of the frame 211, and a magnetic circuit system 213 that drives the vibration system 212 to vibrate and generate sound. The frame 211 is elastically supported on the periphery of the sound outlet 10 by a connector 2111 with elastic deformation properties, so as to seal the sound outlet 10.

[0033] The vibration system 212 includes a diaphragm 2121 fixed to the frame 211 and a voice coil 2122 fixed to the side of the diaphragm 2121 near the magnetic circuit system 213 and driving the diaphragm 2121 to vibrate and produce sound. The diaphragm 2121 is positioned directly opposite the sound outlet 10.

[0034] The magnetic circuit system 213 includes a lower clamping plate 2131, a main magnet 2132 fixed to the lower clamping plate 2131 and in a ring shape, and a secondary magnet 2133 fixed to the lower clamping plate 2131 and located on the outer periphery of the main magnet 2132. The lower clamping plate 2131 is elastically supported on the outer shell 1, specifically, the lower clamping plate 2131 is elastically supported on the first shell 11. The secondary magnet 2133 and the main magnet 2132 are spaced apart to form a magnetic gap 20, and the voice coil 2122 is inserted and suspended in the magnetic gap 20. Of course, the sound-generating unit 21 is not limited to being elastically supported by the lower clamping plate 2131 and the first shell 11 of the outer shell 1.

[0035] There are three types of ring-shaped design for the main magnet 2132: the first type is to design it as a whole ring structure; the second type is to design it as a ring structure formed by splicing multiple sub-magnets 21321 end to end; and the third type is to design it as a broken ring structure with gaps, where the gaps can be one or multiple gaps spaced apart.

[0036] In this embodiment, the main magnet 2132 includes four sub-magnets 21321, all of which are fixed to the lower clamping plate 2131. The four sub-magnets 21321 are spliced ​​end to end and together form a ring. The auxiliary magnets 2133 include four and are respectively disposed on the outside of the four sub-magnets 21321.

[0037] The four auxiliary magnets 2133 are divided into two opposing first groups of magnets and two opposing second groups of magnets. The two auxiliary magnets 2133 in the first group each include a magnet body 21331 and a protrusion 21332 formed by extending from the central region of the magnet body 21331 away from the main magnet 2132. Alternatively, the two auxiliary magnets 2133 in the second group can be designed with the same structure as the two auxiliary magnets 2133 in the first group.

[0038] The magnetic circuit system 213 also includes an upper clamping plate 2134 fixed to the side of the four sub-magnets 21321 away from the lower clamping plate 2131, and four sub-pole cores 2135 integrally formed with the basin frame 211 and respectively stacked on the side of the four sub-magnets 2133 away from the lower clamping plate 2131. Of course, if the sub-pole cores 2135 are not designed, the side of the sub-magnets 2133 away from the lower clamping plate 2131 can be directly fixedly connected to the basin frame 211.

[0039] When the voice coil 2122 is energized, it will generate a force with the magnetic circuit system 213 to drive the sound-generating unit 21 to move along the vibration direction of the diaphragm 2121.

[0040] The magnet assembly 22 is fixed to the inner circumference of the main magnet 2132; the magnet assembly 22 can be directly fixed to the main magnet 2132, or it can be fixed to the main magnet 2132 through other connecting parts. This design allows both the magnet assembly 22 and the magnetic circuit system 213 to serve as the mass of the vibration unit 2, thereby saving costs and improving overall performance.

[0041] The magnet assembly 22 includes two sets, each fixed to the inner circumference of the main magnet 2132. The two sets of magnet assemblies 22 are arranged on opposite sides of the main magnet 2132 along the vibration direction of the vibration unit 2. The drive coil 3 is located between the two sets of magnet assemblies 22. Each set of magnet assemblies 22 includes three drive magnets 221 spaced apart from each other and arranged side by side along the vibration direction of the vibration unit 2. The three drive magnets 221 in one set of magnet assemblies 22 correspond one-to-one with the three drive magnets 221 in the other set of magnet assemblies 22. When the drive coil 3 is energized, it will generate a force with the six drive coils 3 to drive the multifunctional sound-generating device 100 to move along the vibration direction perpendicular to the diaphragm 2121.

[0042] The magnetization direction of the main magnet 2132 is parallel to the vibration direction of the vibration system 212, that is, the magnetization direction of the main magnet 2132 is parallel to the vibration direction of the diaphragm 2121. The magnetization direction of all driving magnets 221 is perpendicular to the magnetization direction of the main magnet 2132. The magnetization direction of the middle driving magnet 221 in one set of magnet assemblies 22 is opposite to that of the middle driving magnet 221 in another set of magnet assemblies 22. The magnetization direction of the middle driving magnet 221 in any set of magnet assemblies 22 is the same as that of the driving magnets 221 on both sides in another set of magnet assemblies 22. Specifically, the magnetization direction of the middle driving magnet 221 in each set of magnet assemblies 22 is opposite to that of the driving coil 3, and the magnetization direction of each magnet is shown by the dashed line in Figure 5.

[0043] The drive coil 3 is fixed inside the housing 1 and located on the inner circumference of the main magnet 2132. The drive coil 3 and the magnet assembly 22 are spaced apart.

[0044] The multifunctional sound-generating device 100 also includes a frame 4 fixed to the outer shell 1 and located on the inner periphery of the main magnet 2132, with the frame 4 spaced apart from the magnet assembly 22; the drive coil 3 is wound around the frame 4. Specifically, the frame 4 is fixed to the second shell 12; the surface of the frame 4 is provided with an inwardly recessed and annular groove 41, and the drive coil 3 is wound in the groove 41.

[0045] The multifunctional sound-generating device 100 also includes a flexible circuit board 5 fixed inside the housing 1 and electrically connected to the drive coil 3, with one end of the flexible circuit board 5 extending outside the housing 1 away from the drive coil 3. This design facilitates electrical connection between the drive coil 3 and an external power source.

[0046] The multifunctional sound-generating device 100 also includes two spring pieces 6, which elastically support the opposite sides of the lower clamping plate 2131 to the outer shell 1. Specifically, the two spring pieces 6 elastically support the opposite sides of the lower clamping plate 2131 to the first shell 11.

[0047] In addition, the vibration system 212 also includes two elastic members 2123, which are respectively arranged in one-to-one correspondence with the two auxiliary magnets 2133 in the first group of magnets. The two elastic members 2123 are respectively spaced apart from the two auxiliary magnets 2133 in the first group of magnets. The two elastic members 2123 respectively include a first fixed arm 21231, a second fixed arm 21232 that is spaced apart from each other and fixed to the voice coil 2122, and two elastic arms that are bent and extended from the first fixed arm 21231 toward the two second fixed arms 21232 and form a fixed connection. 21233, the middle region of the first fixed arm 21231 is provided with a clearance groove 21234 to avoid the protrusion 21332, and the two elastic arms 21233 bend and extend towards the protrusion 21332 respectively; one of the elastic elements 2123 is a flexible circuit board and is electrically connected to the voice coil 2122, and the elastic element 2123 electrically connected to the voice coil 2122 also includes an extension 21235 formed by the first fixed arm 21231 extending towards the outer casing 1, and the extension 21235 extends outside the outer casing 1. Specifically, the first fixed arm 21231 has an arc-shaped structure. This design not only saves the arrangement space required for the elastic element 2123, but also realizes the electrical connection between the voice coil 2122 and the external power supply.

[0048] Compared with related technologies, the multifunctional sound-generating device 100 of the present invention designs the main magnet 2132 into a ring shape, fixes the magnet assembly 22 to the inner circumference of the main magnet 2132, and fixes the drive coil 3 inside the outer shell 1, with the drive coil 3 located on the inner circumference of the main magnet 2132. At the same time, the drive coil 3 and the magnet assembly 22 are spaced apart, so that the drive coil 3 drives the vibration unit 2 to vibrate in a vibration direction perpendicular to the diaphragm 2121. In this way, the magnetic circuit system 213 and the magnet assembly 22 can be integrated to improve the overall quality and driving force of the vibration unit 2, thereby improving the BL value and vibration of the multifunctional sound-generating device 100 and improving its performance. In addition, it can also make the short signal of the multifunctional sound-generating device 100 crisper and save costs.

[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, the multifunctional sound-generating device comprising a housing, a vibrating unit housed within the housing, and a drive coil for driving the vibrating unit to vibrate; characterized in that, The vibration unit includes a sound-generating unit elastically supported on the outer shell and a magnet assembly fixed to the sound-generating unit. The sound-generating unit includes a frame, a vibration system fixed to the frame, and a magnetic circuit system for driving the vibration system to vibrate and generate sound; the vibration system includes a diaphragm fixed to the frame and a voice coil for driving the diaphragm to vibrate and generate sound; the magnetic circuit system includes a lower clamping plate, a main magnet fixed to the lower clamping plate and in an annular shape, and a secondary magnet fixed to the lower clamping plate and located on the outer periphery of the main magnet, the secondary magnet and the main magnet being spaced apart to form a magnetic gap, and the voice coil being inserted and suspended within the magnetic gap; The magnet assembly is fixed to the inner circumference of the main magnet, and the drive coil is fixed inside the housing and located on the inner circumference of the main magnet. The drive coil is spaced apart from the magnet assembly and drives the vibration unit to vibrate along a vibration direction perpendicular to the diaphragm.

2. The multifunctional sound-generating device as described in claim 1, characterized in that, The magnet assembly includes two sets, which are respectively fixed to the inner circumference of the main magnet. The two sets of magnet assemblies are arranged on opposite sides of the main magnet along the vibration direction of the vibration unit. The drive coil is located between the two sets of magnet assemblies. Each set of magnet assemblies includes three drive magnets that are spaced apart from each other and arranged side by side along the vibration direction of the vibration unit. The three drive magnets in one set of magnet assemblies correspond one-to-one with the three drive magnets in the other set of magnet assemblies.

3. The multifunctional sound-generating device as described in claim 2, characterized in that, The magnetization direction of the main magnet is parallel to the vibration direction of the vibration system; the magnetization direction of all the driving magnets is perpendicular to the magnetization direction of the main magnet, wherein the magnetization direction of the middle driving magnet in one group of magnet assemblies is opposite to the magnetization direction of the middle driving magnet in another group of magnet assemblies, and the magnetization direction of the middle driving magnet in any group of magnet assemblies is the same as the magnetization direction of the driving magnets on both sides in another group of magnet assemblies.

4. The multifunctional sound-generating device as described in claim 1, characterized in that, The multifunctional sound-generating device also includes a frame fixed to the housing and located on the inner circumference of the main magnet, the frame being spaced apart from the magnet assembly; the drive coil is wound around the frame.

5. The multifunctional sound-generating device as described in claim 4, characterized in that, The surface of the skeleton is provided with an inwardly recessed, annular groove; the drive coil is wound inside the groove.

6. The multifunctional sound-generating device as described in claim 1, characterized in that, The multifunctional sound-generating device also includes a flexible circuit board fixed inside the housing and electrically connected to the drive coil, with one end of the flexible circuit board away from the drive coil extending outside the housing.

7. The multifunctional sound-generating device as described in claim 1, characterized in that, The multifunctional sound-generating device also includes two spring plates, which elastically support the opposite sides of the lower clamping plate against the outer shell.

8. The multifunctional sound-generating device as described in claim 1, characterized in that, The main magnet includes four sub-magnets, all of which are fixed to the lower clamping plate. The four sub-magnets are spliced ​​end to end and together form a ring. The auxiliary magnet includes four magnets, which are respectively disposed on the outside of the four sub-magnets.

9. The multifunctional sound-generating device as described in claim 8, characterized in that, The magnetic circuit system also includes an upper clamping plate fixed to the side of the four sub-magnets away from the lower clamping plate, and four sub-pole cores integrally formed with the basket frame and respectively stacked on the side of the four sub-magnets away from the lower clamping plate.

10. The multifunctional sound-generating device as described in claim 8, characterized in that, The four auxiliary magnets are divided into two opposing first groups of magnets and two opposing second groups of magnets. Each of the two auxiliary magnets in the first group includes a magnet body and a protrusion extending from the central region of the magnet body away from the main magnet. The vibration system also includes two elastic members, each corresponding to one of the two auxiliary magnets in the first group, spaced apart from each other. Each elastic member includes a first fixed arm, a second fixed arm spaced apart and fixed to the voice coil, and two elastic arms that bend and extend from the first fixed arm towards the two second fixed arms and form a fixed connection. The central region of the first fixed arm has a clearance groove to avoid the protrusion, and the two elastic arms bend and extend towards the protrusion. One of the elastic members is electrically connected to the voice coil. The elastic member electrically connected to the voice coil also includes an extension extending from the first fixed arm towards the outer casing, extending beyond the outer casing.

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