Sound production device

Abstract

The utility model discloses a sounding device which comprises a loudspeaker assembly and a motor assembly surrounding the periphery of the loudspeaker assembly, the motor assembly comprises a motor vibrator and a motor stator used for driving the motor vibrator to move, and the motor stator and the loudspeaker assembly are relatively fixed. The motor vibrator is movably connected to the motor stator and / or the loudspeaker assembly, and at least one of the motor stator and the motor vibrator surrounds the periphery of the loudspeaker assembly. The motor assembly surrounds the periphery of the loudspeaker assembly, compared with a side-by-side arrangement mode, the compactness of the overall structure can be improved, the overall size of the sound production device is reduced, the occupied space of the sound production device is reduced, meanwhile, the motor stator of the motor assembly and the loudspeaker assembly are relatively fixed, and the sound production efficiency is improved. Therefore, only the loudspeaker assembly or the motor stator needs to be fixed to the external object, the whole sound production device can be fixedly installed to the external object, and the motor assembly and the loudspeaker assembly do not need to be respectively fixed.

Description

Technical Field

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

[0002] Some electronic devices, such as mobile phones, often need to have both sound and vibration effects. The sound effect comes from the speaker, and the vibration effect comes from the motor. In the current technology, the speaker and motor are usually set up separately, which occupies a large amount of internal space of the electronic device and has a great impact on the size and layout of other internal components. At the same time, the separate installation of the speaker and motor makes the assembly process complicated, and the time and cost increase accordingly. Utility Model Content

[0003] In view of this, the present invention provides a sound-generating device to solve the problems of large space occupation and complicated assembly process caused by separate installation of the speaker and motor in the prior art.

[0004] This application provides a sound-generating device, including a speaker assembly and a motor assembly surrounding the periphery of the speaker assembly. The motor assembly includes a motor vibrator and a motor stator for driving the motor vibrator to move. The motor stator is fixed relative to the speaker assembly, and the motor vibrator is movably connected to the motor stator and / or the speaker assembly. At least one of the motor stator and the motor vibrator surrounds the periphery of the speaker assembly.

[0005] In some embodiments, the motor stator surrounds the outer periphery of the speaker assembly, a predetermined gap is formed between the motor stator and the speaker assembly, the motor vibrator is movably mounted in the predetermined gap, and the motor vibrator is spaced apart from both the motor stator and the speaker assembly.

[0006] In some embodiments, the motor stator includes a circuit board surrounding the periphery of the speaker assembly and a coil electrically connected to the circuit board, the predetermined gap being formed between the circuit board and the speaker assembly;

[0007] The motor vibrator includes a vibrator body disposed within the preset gap and a magnetic component mounted on the vibrator body. The coil is used to cooperate with the magnetic component to generate magnetic force to drive the motor vibrator to move between the circuit board and the speaker assembly.

[0008] In some embodiments, both the circuit board and the vibrator body are annular, with the vibrator body spaced around the outer periphery of the speaker assembly and the circuit board spaced around the outer periphery of the vibrator body.

[0009] In some embodiments, there are multiple coils and multiple magnetic elements, with multiple coils respectively disposed on different sides of the circuit board and multiple magnetic elements respectively disposed on different sides of the oscillator body. The driving force generated between any coils and magnetic elements located on the same side has the same direction.

[0010] The driving force includes at least one of the following: magnetic force generated by a single coil and a single magnetic element being arranged in a one-to-one correspondence; magnetic resultant force generated by a plurality of magnetic elements being arranged in a single coil; and magnetic resultant force generated by a plurality of coils being arranged in a single magnetic element.

[0011] In some embodiments, the motor assembly has a first direction and a second direction that are perpendicular to each other, and the plurality of coils include a first coil and a second coil, the first coil being located on one side of the circuit board in the first direction and the second coil being located on one side of the circuit board in the second direction;

[0012] The plurality of magnetic components include a first magnetic component and a second magnetic component. The first magnetic component is disposed on one side of the oscillator body in the first direction and corresponds to the first coil. The second magnetic component is disposed on one side of the oscillator body in the second direction and corresponds to the second coil. The driving force generated by the cooperation of the first coil and the first magnetic component and the driving force generated by the cooperation of the second coil and the second magnetic component are in the same direction.

[0013] In some embodiments, the first coil and the first magnetic element are arranged in a one-to-one correspondence to generate a magnetic force along the first direction. The second coil and the second magnetic element are arranged alternately along the first direction, and the polarities of adjacent second coils near the oscillator body are opposite, and the polarities of adjacent second magnetic elements near the circuit board are opposite, so that two adjacent second coils cooperate with a corresponding second magnetic element to generate a driving force along the first direction.

[0014] In some embodiments, the sound-generating device further includes a connecting component, through which the motor vibrator is movably suspended within the preset gap.

[0015] In some embodiments, the connection assembly includes a connector and an elastic element, one end of the connector being connected to the speaker assembly and the other end being connected to the elastic element, the elastic element being connected to the motor vibrator.

[0016] In some embodiments, the motor vibrator is square, and the number of connecting components is four, with the four connecting components respectively located near the four corners of the motor vibrator.

[0017] The sound-generating device provided by this utility model improves the overall structural compactness by surrounding the motor assembly around the speaker assembly, compared to a side-by-side arrangement. This reduces the overall volume of the sound-generating device and the space it occupies. Furthermore, since the motor assembly is located outside the speaker assembly, its size can be adjusted according to actual needs without being affected by the size of the speaker assembly or its internal components. At the same time, the motor stator of the motor assembly is relatively fixed to the speaker assembly. Therefore, the sound-generating device can be fixed to the external object simply by fixing either the speaker assembly or the motor stator to the external object. This eliminates the need for separate fixing operations for the motor assembly and the speaker assembly, reducing the assembly difficulty and simplifying the assembly process, which helps to reduce assembly time and production costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a sound-generating device provided in an embodiment of the present invention;

[0019] Figure 2 for Figure 1 A cross-sectional view of the sound-generating device shown;

[0020] Figure 3 for Figure 1 An exploded view of the motor assembly and connecting components shown;

[0021] Figure 4 for Figure 1 A schematic diagram of the assembly of the sound-generating device shown with its housing removed;

[0022] Figure 5 for Figure 1 A cross-sectional view of the motor assembly and connecting assembly shown;

[0023] Figure 6 for Figure 5 A force diagram of the motor assembly shown in the figure;

[0024] Figure 7 for Figure 1 An exploded view of the speaker assembly shown.

[0025] In the diagram: 10, sound-generating device; 12, loudspeaker assembly; 14, motor assembly; 16, motor vibrator; 18, motor stator; 20, housing; 22, preset gap; 24, connecting assembly; 26, connector; 28, elastic element; 30, circuit board; 32, coil; 34, vibrator body; 36, magnetic element; 38, first coil; 40, second coil; 42, first magnetic element; 44, second magnetic element; 46, frame; 48, vibration system; 50, magnetic circuit system; 52, diaphragm; 54, dome; 56, voice coil; 58, magnetic cover; 60, center magnet; 62, side magnet; 64, magnetic gap; 66, flexible circuit board; 68, auxiliary diaphragm; 70, center pole piece; 72, annular pole piece. Detailed Implementation

[0026] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0027] It should be noted that all directional indicators (such as up, down, left, right, front, back, inside, outside, top, bottom, etc.) in the embodiments of this utility model are only used to explain the relative positional relationship between the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0028] It should also be noted that when a component is referred to as "fixed to" or "set on" another component, the component may be directly on the other component or there may be an intervening component present. When a component is referred to as "connected to" another component, it may be directly connected to the other component or there may be an intervening component present.

[0029] Please see Figures 1 to 7 An embodiment of this utility model provides a sound-generating device 10, including a speaker assembly 12 and a motor assembly 14 connected to the speaker assembly 12. The speaker assembly 12 is used to vibrate to generate sound, and the motor assembly 14 is used to vibrate to create a vibration. The motor assembly 14 and the speaker assembly 12 can be used separately or together. For example, the same sound signal can be applied to the motor assembly 14 and the speaker assembly 12, so that the sound emitted by the motor assembly 14 can supplement the sound emitted by the speaker, thereby enhancing the sound.

[0030] The motor assembly 14 surrounds the speaker assembly 12. Compared to the side-by-side arrangement of the motor assembly 14 and the speaker assembly 12, the surrounding arrangement can improve the compactness of the sound-emitting device 10 structure, which is conducive to reducing the overall volume of the sound-emitting device 10 and thus reducing the space occupied by the sound-emitting device 10. When the sound-emitting device 10 is installed on an external object such as a mobile phone, the smaller space occupied by the sound-emitting device 10 can reduce the impact on the size and layout of other components inside the mobile phone. Moreover, the motor assembly 14 surrounds the speaker assembly 12 without increasing the overall height of the sound-emitting device 10, which is conducive to making the product thinner.

[0031] The motor assembly 14 includes a motor vibrator 16 and a motor stator 18. The motor stator 18 is fixed relative to the speaker assembly 12, and the motor vibrator 16 is movably connected to the motor stator 18 and / or the speaker assembly 12. At least one of the motor stator 18 and the motor vibrator 16 surrounds the outer periphery of the speaker assembly 12. That is, the motor assembly 14 may have only the motor stator 18 or the motor vibrator 16 surrounding the outer periphery of the speaker assembly 12, or both the motor stator 18 and the motor vibrator 16 may surround the outer periphery of the speaker assembly 12. The motor stator 18 cooperates with the motor vibrator 16 to generate a driving force acting on the motor vibrator 16, thereby driving the motor vibrator 16 to move relative to the motor stator 18 and the speaker assembly 12. Since the motor stator 18 and the speaker assembly 12 are fixed relative to each other, the sound-generating device 10 can be fixed to the phone as a whole simply by fixing the motor stator 18 or the speaker assembly 12 to an external object such as a mobile phone. There is no need to fix the motor assembly 14 and the speaker assembly 12 separately, which reduces the assembly difficulty of the sound-generating device 10 and simplifies the assembly process, which helps to reduce assembly time and production costs.

[0032] The specific method by which the motor stator 18 and the speaker assembly 12 are fixed relative to each other is not limited. For example, they can be connected by fasteners or glued together. In this application, the motor assembly 14 also includes a housing 20. The speaker assembly 12 and the motor stator 18 are both located inside the housing 20, and the housing 20 is fixedly connected to the speaker assembly 12 and the motor stator 18 respectively. That is, the motor stator 18 is fixed relative to the speaker assembly 12 through the housing 20.

[0033] The housing 20 includes a base plate and a surrounding wall around the base plate. The base plate and the surrounding wall together form a storage space. The speaker assembly 12 and the motor stator 18 are respectively stored in the storage space, and the motor stator 18 is attached to the inner side of the surrounding wall, while the speaker assembly 12 is fixed to one side of the base plate.

[0034] In one embodiment, the motor stator 18 is annular and surrounds the outer periphery of the speaker assembly 12. A preset gap 22 is formed between the motor stator 18 and the speaker assembly 12. The motor vibrator 16 is movably installed within the preset gap 22 and is spaced apart from both the motor stator 18 and the speaker assembly 12. The motor stator 18 drives the motor vibrator 16 to move within the preset gap 22, that is, between the motor stator 18 and the speaker assembly 12.

[0035] In this embodiment, both the motor stator 18 and the motor vibrator 16 are annular, with the motor vibrator 16 spaced around the outer periphery of the speaker assembly 12 and the motor stator 18 spaced around the outer periphery of the motor vibrator 16.

[0036] The sound-generating device 10 also includes a connecting assembly 24, through which the motor vibrator 16 is movably suspended within a preset gap 22. Specifically, the connecting assembly 24 is connected to both the motor vibrator 16 and the speaker assembly 12, meaning the motor vibrator 16 is movably connected to the speaker assembly 12 via the connecting assembly 24, allowing the motor vibrator 16 to move relative to the speaker assembly 12. Suspending the motor vibrator 16 within the preset gap 22 using the connecting assembly 24 prevents friction caused by contact with other components during movement from affecting the motor vibrator 16's motion.

[0037] The specific manner in which the motor vibrator 16 can move relative to the speaker assembly 12 via the connecting component 24 is not limited. For example, the motor vibrator 16 can be slidably connected to the connecting component 24, and the motor vibrator 16 can move relative to the speaker assembly 12 by sliding relative to the connecting component 24. Alternatively, the connecting component 24 can be made to have a certain elasticity, and the motor vibrator 16 can move relative to the speaker assembly 12 by deforming the connecting component 24.

[0038] In this embodiment, the connecting component 24 includes a connector 26 and an elastic element 28. One end of the connector 26 is connected to the speaker assembly 12, and the other end is connected to the elastic element 28. The elastic element 28 is connected to the motor vibrator 16, thereby connecting the motor vibrator 16 and the speaker assembly 12 together. The connector 26 has a certain strength and can support the motor vibrator 16, so that the motor vibrator 16 is suspended within the preset gap 22. The elastic element 28 is elastic and can deform under external force, so that the motor vibrator 16 can move relative to the speaker assembly 12 by deforming the elastic element 28. Moreover, the elastic element 28 can generate elastic force after deformation. When the motor vibrator 16 is not working, it can return to its initial position under the elastic force of the elastic element 28, forming a reset effect.

[0039] Specifically, the elastic element 28 is a spring, the connector 26 is columnar, one end of the connector 26 is inserted into the speaker assembly 12 and fixed to the speaker assembly 12, the other end is inserted into the spring and fixed to the spring, and the end of the spring away from the speaker assembly 12 is fixed to the motor vibrator 16, thereby movably suspending the motor vibrator 16 in the preset gap 22.

[0040] The specific number of connecting components 24 is not limited and can be set according to actual needs. In this application, the motor vibrator 16 is square with four corners. There are four connecting components 24. Each connecting component 24 is connected to the speaker assembly 12 and the motor vibrator 16 respectively. The four connecting components 24 are respectively set close to the four corners of the motor vibrator 16. This not only better supports the motor vibrator 16 and ensures the accuracy of the installation position of the motor vibrator 16, but also makes the force on the motor vibrator 16 more uniform, ensuring the stability and accuracy of the vibration of the motor vibrator 16.

[0041] In one embodiment, the motor stator 18 includes a circuit board 30 and a coil 32. The circuit board 30 surrounds the outer periphery of the speaker assembly 12 and is spaced apart from the speaker assembly 12. A predetermined gap 22 is formed between the circuit board 30 and the speaker assembly 12. The coil 32 is electrically connected to the circuit board 30. Specifically, the circuit board 30 is annular and is fixedly attached to the inner side of the enclosure wall of the housing 20.

[0042] The motor oscillator 16 includes an oscillator body 34 and a magnetic component 36 mounted on the oscillator body 34. The oscillator body 34 is located within a preset gap 22. A coil 32 on the circuit board 30 is correspondingly arranged with the magnetic component 36 on the oscillator body 34. The coil 32 is used to generate magnetic force in conjunction with the magnetic component 36 to drive the motor oscillator 16 to move between the circuit board 30 and the speaker assembly 12. Specifically, the oscillator body 34 is movably suspended within the preset gap 22 via a connecting component 24. When a corresponding current is passed through the coil 32, it can generate a magnetic field. The magnetic component 36 is located within this magnetic field, thereby forming an attractive or repulsive force with the coil 32 to drive the motor oscillator 16 to move. When the direction of the current passing through the coil 32 changes, the direction of movement of the motor oscillator 16 also changes accordingly. Therefore, the period of reciprocating motion of the motor oscillator 16 is related to the frequency of the current change.

[0043] It should be noted that the corresponding arrangement of coil 32 and magnetic component 36 can mean that coil 32 and magnetic component 36 are directly opposite each other, or that coil 32 and magnetic component 36 are misaligned, as long as coil 32 and magnetic component 36 can cooperate to generate the driving force in the required direction.

[0044] In one embodiment, both the circuit board 30 and the oscillator body 34 are annular. The oscillator body 34 is spaced and surrounds the outer periphery of the speaker assembly 12, and the circuit board 30 is spaced and surrounds the outer periphery of the oscillator body 34. The coil 32 and the magnetic member 36 are respectively disposed on two opposite sides of the circuit board 30 and the oscillator body 34. Specifically, both the circuit board 30 and the oscillator body 34 are square rings, so that the motor assembly 14 forms a shape similar to a figure-eight. In the case of the same actual area of the motor assembly 14, the figure-eight design can make the motor assembly 14 have a larger perimeter, so that the motor oscillator 16 has a larger mass, thereby generating a greater sense of vibration.

[0045] In other embodiments, the circuit board 30 and the oscillator body 34 may also be circular rings or oval rings, etc.

[0046] In the present application, the coil 32 is fixed to the inner side of the circuit board 30, that is, the side close to the oscillator body 34, and protrudes from the surface of the circuit board 30. A groove is provided on the outer side of the oscillator body 34, that is, the side close to the circuit board 30. The magnetic member 36 is installed in the groove, and the magnetic member 36 does not protrude from the surface of the oscillator body 34, that is, the thickness of the magnetic member 36 is less than the depth of the groove, so as to enhance the compactness of the structure of the motor oscillator 16.

[0047] In one embodiment, the number of both the magnetic members 36 and the coils 32 is multiple. The multiple coils 32 are respectively disposed on different sides of the circuit board 30, and the multiple magnetic members 36 are respectively disposed on different sides of the oscillator body 34. The driving force directions generated between the coils 32 and the magnetic members 36 on any same side are the same. That is, the driving force directions generated by the cooperation of the coils 32 and the magnetic members 36 in different directions are the same. The driving force refers to the acting force generated by the cooperation of the coil 32 and the magnetic member 36 and acting on the motor oscillator 16, so that the motor oscillator 16 can obtain a greater driving force, thereby generating a stronger sense of vibration.

[0048] The driving force includes at least one of the following situations: the magnetic force generated by a single coil 32 and a magnetic member 36 being arranged in one-to-one correspondence, the magnetic resultant force generated by multiple magnetic members 36 corresponding to a single coil 32, and the magnetic resultant force generated by multiple coils 32 corresponding to a single magnetic member 36. That is, the driving force received by the motor oscillator 16 can be the magnetic force generated by making the coil 32 and the magnetic member 36 arranged in one-to-one correspondence, and each coil 32 cooperates with a corresponding magnetic member 36, or it can also be the magnetic resultant force generated by making multiple magnetic members 36 correspond to a single coil 32, and the multiple magnetic members 36 cooperate with the corresponding single coil 32, or it can also be the magnetic resultant force generated by making multiple coils 32 correspond to a single magnetic member 36, and the multiple coils 32 cooperate with the corresponding single magnetic member 36, as long as it can drive the motor oscillator 16 to move in a preset direction.

[0049] The motor assembly 14 has a first direction X and a second direction Y that are perpendicular to each other. A plurality of coils 32 include a first coil 38 and a second coil 40. The first coil 38 is located on one side of the circuit board 30 in the first direction X, and the second coil 40 is located on the other side of the circuit board 30 in the second direction Y.

[0050] Multiple magnetic components 36 include a first magnetic component 42 and a second magnetic component 44. The first magnetic component 42 is located on one side of the oscillator body 34 in the first direction X and is correspondingly arranged with the first coil 38. The second magnetic component 44 is located on one side of the oscillator body 34 in the second direction Y and is correspondingly arranged with the second coil 40. The driving force generated by the first coil 38 and the first magnetic component 42 and the driving force generated by the second coil 40 and the second magnetic component 44 are in the same direction. That is, the motor oscillator 16 moves under the combined action of the driving force generated by the first coil 38 and the first magnetic component 42 and the driving force generated by the second coil 40 and the second magnetic component 44, thereby obtaining a greater driving force to form a greater vibration.

[0051] Specifically, there are multiple first coils 38 and multiple second coils 40. The multiple first coils 38 are arranged at intervals along the second direction Y, and the multiple second coils 40 are arranged at intervals along the first direction X. There are multiple first magnetic elements 42 and multiple second magnetic elements 44. The multiple first magnetic elements 42 are arranged at intervals along the second direction Y, and the multiple second magnetic elements 44 are arranged at intervals along the first direction X. The driving force generated by the multiple first coils 38 and multiple first magnetic elements 42 in the first direction X is in the same direction as the driving force generated by the multiple second coils 40 and multiple magnetic elements 36 in the second direction Y.

[0052] The first coil 38 and the first magnetic element 42 are arranged in a one-to-one correspondence to generate a magnetic force along the first direction X. That is, each first coil 38 is directly opposite a first magnetic element 42 in the first direction X, so that each first coil 38 can cooperate with a corresponding first magnetic element 42 to generate a magnetic force along the first direction X. This magnetic force refers to the attractive or repulsive force acting on the motor oscillator. The second coil 40 and the second magnetic element 44 are arranged alternately along the first direction X, and the polarities of adjacent second coils 40 near the oscillator body 34 are opposite, and the polarities of adjacent second magnetic elements 44 near the circuit board 30 are opposite, so that two adjacent second coils 40 cooperate with a corresponding second magnetic element 44 to generate a driving force along the first direction X. Because the polarities of two adjacent second coils 40 on the side closest to the oscillator body 34 are opposite, one of the two adjacent second coils 40 generates a repulsive force relative to the second direction Y on the corresponding second magnetic element 44, while the other generates an attractive force relative to the second direction Y on the second magnetic element 44. Both the repulsive and attractive forces include components in the first direction X and the second direction Y. The components of the repulsive and attractive forces in the first direction X are in the same direction, while the components in the second direction Y are in opposite directions and of the same magnitude. Therefore, the components in the second direction Y cancel each other out, ultimately forming a driving force in the first direction X, while no driving force is formed in the second direction Y. The second coil 40 and the second magnetic element 44 in the second direction Y cooperate to generate a driving force along the first direction X, which, together with the driving force generated by the first coil 38 and the first magnetic element 42, drives the motor oscillator 16 to move. This not only allows the motor oscillator 16 to obtain a greater driving force, but also allows the magnitude or direction of the driving force generated by the cooperation of the second coil 40 and the second magnetic element 44 to be adjusted, thereby producing different vibration sensations.

[0053] It should be noted that the polarity of the first coil 38 and the second coil 40 refers to the polarity of the magnetic field generated by the first coil 38 and the second coil 40 when current is passed through them during the operation of the motor assembly 14.

[0054] The specific manner in which the second coil 40 and the second magnetic element 44, which are correspondingly arranged in the second direction Y, generate the driving force along the first direction X is not limited. For example, the second magnetic element 44 can be arranged between two adjacent second coils 40, and the distance and tilt angle between the center of the second magnetic element 44 and the center of the two adjacent second coils 40 are the same. Then, currents of the same magnitude but opposite directions are passed through the two adjacent second coils 40, so that the polarities of the two second coils 40 on the side closer to the oscillator body 34 are opposite, thereby generating repulsive and attractive forces of the same magnitude and forming an angle on the second magnetic element 44. The angle between the repulsive and attractive forces is bisected by a straight line along the first direction X, so that the repulsive force and the attractive force cancel each other out in the second direction Y, and the component forces in the first direction X are superimposed to form the driving force along the first direction X.

[0055] In this embodiment, the motor assembly 14 has a rectangular outline, meaning the circuit board 30 and the oscillator body 34 form a rectangular ring. The first direction X and the second direction Y of the motor assembly 14 are the length direction and the width direction, respectively. Both the circuit board 30 and the oscillator body 34 are composed of four end-to-end connected sides, with two sides arranged parallel to each other in the length direction and the other two sides arranged parallel to each other in the width direction. A first coil 38 is disposed on two sides of the circuit board 30 arranged parallel to each other in the length direction, and a first magnetic element 42 is disposed on two sides of the oscillator body 34 arranged parallel to each other in the length direction; a second coil 40 is disposed on two sides of the circuit board 30 arranged parallel to each other in the width direction, and a second magnetic element 44 is disposed on two sides of the oscillator body 34 arranged parallel to each other in the width direction.

[0056] Specifically, the circuit board 30 has two sides arranged along its length, each side having three first coils 38 spaced apart along its width; the oscillator body 34 has two sides arranged along its length, each side having three first magnetic elements 42 spaced apart along its width. The circuit board 30 has two sides arranged along its width, each side having four second coils 40 spaced apart along its length; the oscillator body 34 has two sides arranged along its width, each side having three second magnetic elements 44 spaced apart along its length. A second magnetic element 44 is positioned between every two adjacent second coils 40, creating an alternating arrangement of the second coils 40 and the second magnetic elements 44.

[0057] It should be noted that the second magnetic element 44 being located between two adjacent second coils 40 means that the second magnetic element 44 is located between the two ends of the two adjacent second coils 40 that are far apart from each other. Therefore, the second coils 40 and the second magnetic element can be completely offset in the width direction or they can partially overlap.

[0058] In one embodiment, the speaker assembly 12 includes a frame 46, a vibration system 48, and a magnetic circuit system 50. The vibration system 48 and the magnetic circuit system 50 are respectively mounted to the frame 46 and arranged along the axial direction of the frame 46. The magnetic circuit system 50 can generate a magnetic field, and the vibration system 48 can vibrate under the action of the magnetic field of the magnetic circuit system 50 to produce sound. The motor assembly 14 surrounds the outer periphery of the frame 46. Specifically, the motor vibrator 16 is spaced around the outer periphery of the frame 46 and connected to the frame 46 through the connecting assembly 24. The motor stator 18 is fixed relative to the magnetic circuit system 50 through the housing 20.

[0059] The vibration system 48 includes a diaphragm 52 connected to the frame 46, a dome 54 fixed relative to the diaphragm 52, and a voice coil 56 fixed to the side of the diaphragm 52 near the magnetic circuit system 50. The magnetic circuit system 50 includes a magnetic cover 58 connected to the frame 46, a central magnet 60 fixed to the magnetic cover 58, and a side magnet 62 fixed to the magnetic cover 58 and spaced apart from the central magnet 60. The central magnet 60 is located in the middle of the magnetic cover 58, and the side magnet 62 is close to the edge of the magnetic cover 58. A magnetic gap 64 is formed between the central magnet 60 and the side magnet 62. The voice coil 56 is inserted into the magnetic gap 64. When current is passed through the voice coil 56, it can vibrate under the action of the magnetic field generated by the central magnet 60 and the side magnetic field, and drive the diaphragm 52 and the dome 54 to vibrate.

[0060] The vibration system 48 also includes a flexible circuit board 66 and an auxiliary diaphragm 68. The flexible circuit board 66 is connected to the frame 46 and the end of the voice coil 56 away from the diaphragm 52, respectively. The auxiliary diaphragm 68 is connected to the side of the flexible circuit board 66 away from the frame 46.

[0061] The magnetic circuit system 50 also includes a central pole piece 70 and an annular pole piece 72 for conducting magnetism. The central pole piece 70 is attached and fixed to the side of the central magnet 60 away from the magnetic cover 58, and the annular pole piece 72 is fixed to the inner side of the frame 46 and attached and fixed to the side of the side magnet 62 away from the magnetic cover 58.

[0062] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A sound producing device, characterized by, The motor assembly surrounds the periphery of the speaker assembly, and the motor assembly comprises a motor stator and a motor vibrator for driving the motor vibrator to move, the motor stator is fixed relative to the speaker assembly, the motor vibrator is movably connected to the motor stator and / or the speaker assembly, and at least one of the motor stator and the motor vibrator surrounds the periphery of the speaker assembly.

2. The sound production device of claim 1, wherein, The motor stator surrounds the periphery of the speaker assembly, a preset gap is formed between the motor stator and the speaker assembly, and the motor vibrator is movably arranged in the preset gap and spaced apart from the motor stator and the speaker assembly, respectively.

3. The sound production device of claim 2, wherein, The motor stator comprises a circuit board surrounding the periphery of the speaker assembly and a coil electrically connected to the circuit board, and the preset gap is formed between the circuit board and the speaker assembly. The motor vibrator comprises a vibrator body arranged in the preset gap and a magnetic member arranged on the vibrator body, and the coil is used to cooperate with the magnetic member to generate a magnetic force to drive the motor vibrator to move between the circuit board and the speaker assembly.

4. The sound production device of claim 3, wherein, The circuit board and the vibrator body are both annular, the vibrator body is spaced apart and surrounds the periphery of the speaker assembly, and the circuit board is spaced apart and surrounds the periphery of the vibrator body.

5. The sound production device of claim 4, wherein, The number of the coil and the magnetic member is multiple, multiple coils are arranged on different sides of the circuit board, multiple magnetic members are arranged on different sides of the vibrator body, and the driving force generated between any coils and magnetic members on the same side is in the same direction. The driving force includes at least one of the following: a magnetic force generated by one-to-one correspondence between the coil and the magnetic member, a magnetic resultant force generated by one-to-one correspondence between multiple magnetic members and a single coil, and a magnetic resultant force generated by one-to-one correspondence between multiple coils and a single magnetic member.

6. The sound production device of claim 5, wherein, The motor assembly has a first direction and a second direction perpendicular to each other, the multiple coils include a first coil and a second coil, the first coil is located on one side of the circuit board in the first direction, and the second coil is located on one side of the circuit board in the second direction. The multiple magnetic members include a first magnetic member and a second magnetic member, the first magnetic member is arranged on one side of the vibrator body in the first direction and corresponds to the first coil, the second magnetic member is arranged on one side of the vibrator body in the second direction and corresponds to the second coil, and the driving force generated by cooperation between the first coil and the first magnetic member and the driving force generated by cooperation between the second coil and the second magnetic member are in the same direction.

7. The sound production device of claim 6, wherein, The first coil and the first magnetic member are arranged one by one to cooperate to generate a magnetic force along the first direction, the second coil and the second magnetic member are arranged alternately along the first direction, and the polarity of adjacent second coils close to one side of the vibrator body is opposite, and the polarity of adjacent second magnetic members close to one side of the circuit board is opposite, so that the two adjacent second coils cooperate with a corresponding second magnetic member to generate a driving force along the first direction.

8. Sound production device according to any of claims 2-7, characterized in that The sound generating device further comprises a connecting assembly, and the motor vibrator is movably suspended in the preset gap through the connecting assembly.

9. The sound production device of claim 8, wherein, The connecting assembly comprises a connecting piece and an elastic piece, one end of the connecting piece is connected with the loudspeaker assembly, the other end is connected with the elastic piece, and the elastic piece is connected with the motor vibrator.

10. The sound production device of claim 8, wherein, The motor vibrator is square, the number of the connecting assemblies is four, and the four connecting assemblies are arranged close to four corners of the motor vibrator respectively.

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