Vibration sound-producing device and electronic apparatus

Abstract

A vibration sound-producing device and an electronic apparatus. The vibration sound-producing device comprises a shell, a first magnetic circuit system, a second magnetic circuit system, a first vibration system and a second vibration system. The first magnetic circuit system comprises a central magnetic portion. The first vibration system and the second vibration system are respectively arranged on two opposite sides of the first magnetic circuit system; and the second vibration system comprises a vibrator assembly, wherein the vibrator assembly comprises a driving coil, the driving coil comprising two connecting edges arranged opposite to each other. The second magnetic circuit system is arranged on the side of the driving coil that faces away from the central magnetic portion. The central magnetic portion comprises a first magnet and a second magnet which are adjacent to each other and have opposite magnetizing directions. The second magnetic circuit system comprises a third magnet and a fourth magnet which have opposite magnetizing directions. In a first direction, the first magnet and the third magnet have the same magnetizing direction and are located on two opposite sides of one of the connecting edges, and the second magnet and the fourth magnet have the same magnetizing direction and are located on two opposite sides of the other connecting edge. The vibration sound-producing device has good sound production and vibration effects.

Description

Vibration sound generating device and electronic device TECHNICAL FIELD

[0001] The present application relates to the field of electro-acoustic devices, and in particular to a vibration sound generating device and an electronic device. BACKGROUND

[0002] Smart terminal devices, especially mobile phones, usually need to have both audio experience and vibration haptic feedback experience. The audio experience comes from the sound generating unit, and the vibration haptic feedback experience comes from the vibration unit.

[0003] In the related art, a vibration sound generating module is proposed in which a sound generating unit and a vibration unit are integrated. The sound generating unit and the vibration unit share a set of magnetic circuit systems, which provide driving force for the voice coil of the sound generating unit and the driving coil of the motor unit. However, as the requirements for the comprehensive performance of terminal products become higher and higher, the above structure design is difficult to meet the sound generating sensitivity requirements of the sound generating unit and the vibration feeling requirements of the motor unit, and cannot meet the user's use demand for the terminal product. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application proposes a vibration sound generating device, which has good sound generating and vibration feedback effects.

[0005] The present application also proposes an electronic device having the above vibration sound generating device.

[0006] According to the vibration sound production device of the first aspect of the present application, the first magnetic circuit system is connected with the shell, the first magnetic circuit system comprises a central magnetic part and a side magnetic part, the side magnetic part is arranged outside the central magnetic part and is arranged to be spaced from the central magnetic part to define a magnetic gap, the central magnetic part comprises a plurality of first sub-central magnets which are spaced in a first direction and magnetized in a second direction, the first direction is perpendicular to the second direction; the first vibration system and the second vibration system, the first vibration system vibrates in the second direction, the first vibration system and the second vibration system are arranged on opposite sides of the first magnetic circuit system in the second direction, the first vibration system comprises a diaphragm assembly and a voice coil, one end of the voice coil is connected with the diaphragm assembly, the other end of the voice coil is arranged corresponding to the magnetic gap; the second vibration system is arranged in the mounting space and vibrates in the first direction, the second vibration system comprises an elastic connecting piece and a vibrator assembly, the two ends of the elastic connecting piece are respectively connected with the vibrator assembly and the inner wall of the shell, the vibrator assembly comprises a drive coil, the drive coil comprises two oppositely arranged connecting sides, the drive coil is arranged opposite to the central magnetic part in the second direction; the second magnetic circuit system is arranged on the side of the drive coil away from the first magnetic circuit system, wherein the plurality of first sub-central magnets comprises first magnets and second magnets which are adjacent and have opposite magnetization directions, the second magnetic circuit system comprises third magnets and fourth magnets which have opposite magnetization directions, the first magnets and the third magnets have the same magnetization direction and are located on opposite sides of one of the connecting sides in the second direction, the second magnets and the fourth magnets have the same magnetization direction and are located on opposite sides of the other connecting side in the second direction.

[0007] According to the vibration sound production device of the first aspect of the present application, the first magnetic circuit system is connected with the shell, the first magnetic circuit system comprises a central magnetic part and a side magnetic part, the side magnetic part is arranged outside the central magnetic part and is arranged to be spaced from the central magnetic part to define a magnetic gap, the central magnetic part comprises a plurality of first sub-central magnets which are spaced in a first direction and magnetized in a second direction, the first direction is perpendicular to the second direction; the first vibration system and the second vibration system, the first vibration system vibrates in the second direction, the first vibration system and the second vibration system are arranged on opposite sides of the first magnetic circuit system in the second direction, the first vibration system comprises a diaphragm assembly and a voice coil, one end of the voice coil is connected with the diaphragm assembly, the other end of the voice coil is arranged corresponding to the magnetic gap; the second vibration system is arranged in the mounting space and vibrates in the first direction, the second vibration system comprises an elastic connecting piece and a vibrator assembly, the two ends of the elastic connecting piece are respectively connected with the vibrator assembly and the inner wall of the shell, the vibrator assembly comprises a drive coil, the drive coil comprises two oppositely arranged connecting sides, the drive coil is arranged opposite to the central magnetic part in the second direction; the second magnetic circuit system is arranged on the side of the drive coil away from the first magnetic circuit system, wherein the plurality of first sub-central magnets comprises first magnets and second magnets which are adjacent and have opposite magnetization directions, the second magnetic circuit system comprises third magnets and fourth magnets which have opposite magnetization directions, the first magnets and the third magnets have the same magnetization direction and are located on opposite sides of one of the connecting sides in the second direction, the second magnets and the fourth magnets have the same magnetization direction and are located on opposite sides of the other connecting side in the second direction.

[0008] According to some embodiments of the present application, along the first direction, the first magnet or the second magnet is located at one end of the first sub-center magnets, and the magnetization direction of the first magnet or the second magnet is the same as that of the first sub-center magnet located at the other end of the first sub-center magnets.

[0009] According to some embodiments of the present application, along the first direction, the first sub-center magnets include end magnets located at two ends and intermediate magnets located between the two end magnets, the first magnet and the second magnet are the intermediate magnets, and the magnetization directions of the two end magnets are the same.

[0010] According to some embodiments of the present application, the second magnetic circuit system further comprises a fifth magnet located between the third magnet and the fourth magnet and extending along the first direction, the third magnet, the fourth magnet and the fifth magnet form a Halbach array, and the magnetic field strengthening side of the Halbach array is located on the side of the second magnetic circuit system facing the driving coil.

[0011] According to some embodiments of the present application, the first magnetic circuit system further comprises a magnetic yoke, the magnetic yoke comprises a body portion and a hollow hole provided on the body portion, the center magnetic portion and the edge magnetic portion are provided on the body portion, and along the second direction, the hollow hole is at least partially opposite to the driving coil.

[0012] In some embodiments of the present application, the edge magnetic portion and the first sub-center magnets located at two ends are provided on the body portion; or, the center magnetic portion further comprises second sub-center magnets provided at two ends of a third direction of the first sub-center magnets, the third direction is perpendicular to the first direction and the second direction respectively, and the edge magnetic portion and the second sub-center magnets are provided on the body portion.

[0013] According to some embodiments of the present application, the vibrator assembly further comprises a counterweight, two ends of the elastic connecting member are connected with the counterweight and the shell respectively, the driving coil is provided on the counterweight, the counterweight is provided with a through hole, and along the second direction, at least part of the driving coil is opposite to the second magnetic circuit system through the through hole.

[0014] According to some embodiments of the present application, the shell comprises a main body portion and a bending portion provided on the outer periphery of the main body portion, the bending portion is bent and extends towards the direction close to the first vibration system relative to the main body portion, one end of the elastic connecting member is fixed to the bending portion, the main body portion is provided with a support block, the first magnetic circuit system further comprises a magnetic yoke, the center magnetic portion and the edge magnetic portion are provided on the side of the magnetic yoke opposite to the diaphragm assembly, and the side of the magnetic yoke away from the diaphragm assembly is supported and fixed to the support block.

[0015] In some embodiments of the present application, the outer circumferential side of the magnetic yoke is provided with a positioning groove, the bent portion is provided with a positioning protrusion corresponding to the positioning groove, and the positioning protrusion is inserted into the corresponding positioning groove; and / or, the bent portion is flush with the outer circumferential wall of the first magnetic circuit system.

[0016] In some embodiments of the present application, the second magnetic circuit system is fixed to the main body portion.

[0017] According to the electronic device of the second aspect of the embodiments of the present application, the vibration sound generating device according to the above-mentioned embodiments of the present application is provided.

[0018] According to the electronic device of the second aspect of the embodiments of the present application, the vibration sound generating device has good sound generating effect and vibration effect, so that the electronic device has good sound quality and vibration feedback effect, and the product market competitiveness of the electronic device is improved.

[0019] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0020] The above-mentioned and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

[0021] Fig. 1 is an exploded structural schematic view of a vibration sound generating device according to a first embodiment of the present application;

[0022] Fig. 2 is a vertical sectional view of the vibration sound generating device according to the first embodiment of the present application;

[0023] Fig. 3 is a schematic view of the magnet arrangement of a magnetic circuit system of the vibration sound generating device according to the first embodiment of the present application;

[0024] Fig. 4 is a schematic view of the magnet charging state of the magnetic circuit system of the vibration sound generating device according to the first embodiment of the present application;

[0025] Fig. 5 is an exploded structural schematic view of a vibration sound generating device according to a second embodiment of the present application;

[0026] Fig. 6 is a vertical sectional view of the vibration sound generating device according to the second embodiment of the present application;

[0027] Fig. 7 is a schematic view of the magnet arrangement of a magnetic circuit system of the vibration sound generating device according to the second embodiment of the present application;

[0028] Fig. 8 is a schematic view of the magnet charging state of the magnetic circuit system of the vibration sound generating device according to the second embodiment of the present application.

[0029] : Reference numerals: Vibration sound-generating device 100, housing 1, installation space 1a, main body 11, bending portion 12, first magnetic circuit system 2, magnetic yoke 21, main body 211, hollow hole 21a, positioning groove 21b, central magnetic portion 22, first sub-center magnet 221, first magnet 221a, second magnet 221b, end magnet 221c, second sub-center magnet 222, central magnetic plate 223, side magnetic portion 23, side magnet 231, side magnetic plate 232, second magnetic circuit system 3, third magnet 31, fourth magnet 32, fifth magnet 33, first vibration system 4, diaphragm assembly 41, diaphragm 411, vibration plate 412, voice coil 42, centering support 43, second vibration system 5, elastic connector 51, vibrator assembly 52, counterweight 521, assembly groove 521a, Through hole 521b, driving coil 522, connecting edge 5221, motor support piece 53, basin frame 6. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar components or components having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and are not to be construed as limiting the present invention.

[0031] The following describes in detail a vibration sound-generating device 100 according to a first embodiment of the present invention with reference to FIG1 to FIG8 . The vibration sound-generating device 100 may be a speaker unit or a speaker module having both sound-generating and vibration functions.

[0032] As shown in Figures 1-2 and Figures 4-5, the vibration sound-generating device 100 according to the first embodiment of the present invention includes: a shell 1, a first magnetic circuit system 2, a second magnetic circuit system 3, a first vibration system 4 and a second vibration system 5.

[0033] The shell 1 can be made of metal or a composite of metal and plastic. For example, the shell 1 can be made of stainless steel. The shell 1 can also include at least two parts, one of which is a metal part and the other is a plastic part. An installation space 1a can be defined in the shell 1. The first magnetic circuit system 2 can be connected to the shell 1. The first magnetic circuit system 2 includes a central magnetic part 22 and a side magnetic part 23. The side magnetic part 23 is arranged on the outside of the central magnetic part 22 and is spaced apart from the central magnetic part 22 to define a magnetic gap. The central magnetic part 22 includes a plurality of first sub-center magnets 221 spaced apart along a first direction (for example, a horizontal x direction) and magnetized along a second direction (for example, a vertical z direction). The first direction is perpendicular to the second direction.

[0034] As shown in FIG. 2 and FIG. 4, the first vibration system 4 is arranged along the second direction (for example, the vertical z direction) and the first vibration system 4 and the second vibration system 5 are respectively arranged on opposite sides of the first magnetic circuit system 2 along the second direction. The first vibration system 4 includes a diaphragm assembly 41 and a voice coil 42, one end of the voice coil 42 is connected to the diaphragm assembly 41, and the other end of the voice coil 42 is arranged corresponding to the magnetic gap. The second vibration system 5 is arranged in the mounting space 1a and vibrates along the first direction. The second vibration system 5 includes an elastic connecting piece 51 and a vibration element assembly 52, two ends of the elastic connecting piece 51 are respectively connected to the vibration element assembly 52 and the inner wall of the shell 1, and the elastic connecting piece 51 can suspend the vibration element assembly 52 in the mounting space 1a. The vibration element assembly 52 includes a driving coil 522, and the driving coil 522 includes two oppositely arranged connecting edges 5221. Along the second direction, the driving coil 522 is arranged opposite to the center magnetic part 22.

[0035] Specifically, the first magnetic circuit system 2 and the first vibration system 4 can constitute a sound generating unit of the vibration sound generating device 100. The first vibration system 4 can include the diaphragm assembly 41 and the voice coil 42, one end of the voice coil 42 is connected to the diaphragm assembly 41, and the other end of the voice coil 42 is arranged corresponding to the magnetic gap. Alternatively, along the second direction, the other end of the voice coil 42 can be arranged opposite to the magnetic gap, that is, the other end of the voice coil 42 is located outside the magnetic gap. Of course, along the second direction, the other end of the voice coil 42 can also be inserted into the magnetic gap. When the sound generating unit works, current is passed through the voice coil 42, and the voice coil 42 reciprocates along the second direction under the driving of the magnetic force, thereby driving the diaphragm assembly 41 to vibrate and sound, realizing the sound generating effect of the sound generating unit.

[0036] Alternatively, the diaphragm assembly 41 can include a diaphragm 411 and a vibration plate 412 arranged on the diaphragm 411, the sound generating unit can further include a basket 6, the outer periphery of the diaphragm 411 can be fixed to the basket 6, one end of the voice coil 42 can be connected to the vibration plate 412, and the first magnetic circuit system 2 can be fixed to the basket 6. The first vibration system 4 can further include a centering support 43, one end of the centering support 43 is connected to the bottom of the voice coil 42, and the other end of the centering support 43 is connected to the basket 6. The centering support 43 can balance the vibration of the voice coil 42 and improve the running stability of the first vibration system 4.

[0037] As shown in FIG. 2 and FIG. 6, the second magnetic circuit system 3 can be arranged on the side of the driving coil 522 opposite to the first magnetic circuit system 2, wherein the plurality of first sub-center magnets 221 include adjacent first magnets 221a and second magnets 221b with opposite magnetization directions, the second magnetic circuit system 3 includes third magnets 31 and fourth magnets 32 with opposite magnetization directions, and along the second direction, the first magnets 221a and the third magnets 31 have the same magnetization direction and are located on opposite sides of one connecting edge 5221, and the second magnets 221b and the fourth magnets 32 have the same magnetization direction and are located on opposite sides of the other connecting edge 5221.

[0038] The first magnetic circuit system 2, the second magnetic circuit system 3, and the second vibration system 5 can constitute a motor unit of the vibration sound device 100. The second vibration system 5 can include an elastic connecting piece 51 and a vibrator assembly 52, and the two ends of the elastic connecting piece 51 are respectively connected with the vibrator assembly 52 and the inner wall of the shell 1. The vibrator assembly 52 can include a counterweight 521 and a driving coil 522 arranged on the counterweight 521. The first magnets 221a and the second magnets 221b in the first magnetic circuit system 2 and the third magnets 31 and the fourth magnets 32 in the second magnetic circuit system 3 are all magnetized along the second direction, and the magnetization directions of the first magnets 221a and the second magnets 221b are opposite, the magnetization directions of the third magnets 31 and the fourth magnets 32 are opposite, the magnetization directions of the first magnets 221a and the third magnets 31 are the same, and the magnetization directions of the second magnets 221b and the fourth magnets 32 are the same. Along the second direction, the first magnets 221a and the third magnets 31 are located on opposite sides of one connecting edge 5221 of the driving coil 522, and the second magnets 221b and the fourth magnets 32 are located on opposite sides of the other connecting edge 5221 of the driving coil 522. Thus, the magnetic induction lines of the first magnets 221a, the third magnets 31, the fourth magnets 32, and the second magnets 221b form a complete magnetic circuit. When the motor unit is working, the driving coil 522 is driven to reciprocate by the magnetic field force of the magnetic circuit formed by the first magnets 221a, the third magnets 31, the fourth magnets 32, and the second magnets 221b, so that the motor unit can generate a vibration feeling.

[0039] It can be understood that, since the center magnetic part 22 not only needs to cooperate with the side magnetic part 23 to form a magnetic gap cooperating with the voice coil 42 to provide a driving force for driving the first vibration system 4 to vibrate, but also needs to cooperate with the driving coil 522 to provide a driving force for driving the second vibration system 5 to vibrate. By arranging the second magnetic circuit system 3 on the side of the driving coil 522 away from the first magnetic circuit system 2, the third magnet 31 and the fourth magnet 32 in the second magnetic circuit system 3 and the first magnet 221a and the second magnet 221b in the first magnetic circuit system 2 oppositely arranged in pairs along the second direction and jointly form a complete magnetic circuit acting on the driving coil 522, so that the magnetic field strength acting on the driving coil 522 can be increased, the BL value of the driving coil 522 can be improved, and the vibration sensation generated by the second vibration system 5 can be enhanced.

[0040] According to the vibration sound generating device 100 of the first aspect embodiment of the present application, by arranging the second magnetic circuit system 3 on the side of the driving coil 522 away from the first magnetic circuit system 2, the third magnet 31 and the fourth magnet 32 in the second magnetic circuit system 3 and the first magnet 221a and the second magnet 221b in the first magnetic circuit system 2 oppositely arranged in pairs along the second direction and jointly form a complete magnetic circuit acting on the driving coil 522, so that the magnetic field strength acting on the driving coil 522 can be increased, the BL value of the driving coil 522 can be improved, and the vibration sensation generated by the second vibration system 5 can be enhanced, and the vibration sensation effect generated by the vibration sound generating device 100 can be improved; in addition, the first vibration system 4 and the second vibration system 5 of the vibration sound generating device 100 share the first magnetic circuit system 2, and a part of the magnetic field in the first magnetic circuit system 2 can be used to act on the driving coil 522 to improve the vibration sensation of the second vibration system 5 on the premise that the sound generating requirement of the first vibration system 4 is met, so that the magnetic field utilization rate of the first magnetic circuit system 2 can be improved.

[0041] According to some embodiments of the present application, along the first direction, the first magnet 221a or the second magnet 221b is located at one end of the plurality of first sub-center magnets 221, and the magnetization direction is the same as that of the first sub-center magnet 221 located at the other end of the plurality of first sub-center magnets 221, that is, the plurality of first sub-center magnets 221 are arranged at intervals along the first direction, one end of which is the first magnet 221a or the second magnet 221b, and the first magnet 221a and the second magnet 221b are arranged adjacent to each other and have opposite magnetization directions, and the first sub-center magnet 221 at the other end has the same magnetization direction as the first magnet 221a or the second magnet 221b at the end, so that the first magnet 221a or the second magnet 221b at the end not only cooperates with the side magnetic part 23 to form a magnetic circuit acting on the voice coil 42, but also cooperates with the third magnet 31 and the fourth magnet 32 to form a magnetic circuit acting on the driving coil 522, and the structure design is relatively simple and compact.

[0042] As shown in FIG. 2 and FIG. 6, according to some embodiments of the present application, along the first direction, the plurality of first sub-center magnets 221 include end magnets 221c located at both ends and intermediate magnets located between the two end magnets 221c, the first magnet 221a and the second magnet 221b are intermediate magnets, and the magnetization directions of the two end magnets 221c are the same. Specifically, the plurality of first sub-center magnets 221 are spaced apart along the first direction, the magnetization directions of the two end magnets 221c located at the ends are the same, and the side magnetic circuit can include a side magnet 231, the magnetization directions of the two end magnets 221c and the side magnet 231 are opposite, thereby forming a magnetic circuit acting on the voice coil 42. Among them, the first magnet 221a and the second magnet 221b are intermediate magnets located between the two end magnets 221c, thereby the first magnet 221a and the second magnet 221b can cooperate with the third magnet 31 and the fourth magnet 32 to form a magnetic circuit acting on the driving coil 522, and the two end magnets 221c cooperate with the side magnet 231 to form a magnetic circuit acting on the voice coil 42, thereby the sound emitting sensitivity requirement of the first vibration system 4 and the vibration feedback effect of the second vibration system 5 can be ensured at the same time, and the sound emitting effect and the vibration feedback effect of the vibration sound emitting device 100 can be ensured.

[0043] In the specific example shown in FIGS. 1-4, the first magnetic circuit system 2 includes a center magnetic portion 22 and a side magnetic portion 23 disposed outside the center magnetic portion 22 and spaced apart from the center magnetic portion 22 to form a magnetic gap, and the voice coil 42 is disposed in the magnetic gap away from the first diaphragm assembly 41. The side magnetic portion 23 includes a side magnet 231, and the center magnetic portion 22 includes four first sub-center magnets 221 spaced apart along a first direction (horizontal x direction), each of which is magnetized along a second direction (vertical z direction). Among them, the two first sub-center magnets 221 located at the two ends of the first direction are end magnets 221c and have the same magnetization direction, and the magnetization directions of the two end magnets 221c are opposite to the magnetization direction of the side magnet 231 to form a magnetic circuit acting on the voice coil 42. The two first sub-center magnets 221 located in the middle position are a first magnet 221a and a second magnet 221b, which form a middle magnet, and the magnetization directions of the first magnet 221a and the second magnet 221b are opposite. That is, the four first sub-center magnets 221 of the center magnetic portion 22 along the first direction are the end magnet 221c, the first magnet 221a, the second magnet 221b, and the end magnet 221c in turn. The second magnetic circuit system 3 includes two magnets, i.e. a third magnet 31 and a fourth magnet 32, which are disposed on the side of the drive coil 522 away from the center magnetic portion 22, and the third magnet 31 and the fourth magnet 32 are both magnetized along the second direction and have opposite magnetization directions. The third magnet 31 is opposite to the first magnet 221a along the second direction and has the same magnetization direction, and the fourth magnet 32 is opposite to the second magnet 221b along the second direction and has the opposite magnetization direction.

[0044] For example, the side magnet 231 is magnetized along the direction from top to bottom, as shown in FIG. 2, along the first direction, the magnetization directions of the four first sub-center magnets 221 are in turn from bottom to top, from top to bottom, from bottom to top, and from bottom to top, the third magnet 31 is magnetized along the direction from top to bottom, and the fourth magnet 32 is magnetized along the direction from bottom to top. Alternatively, for example, the side magnet 231 is magnetized along the direction from bottom to top, along the first direction, the magnetization directions of the four first sub-center magnets 221 are in turn from top to bottom, from bottom to top, from top to bottom, and from top to bottom, the third magnet 31 is magnetized along the direction from bottom to top, and the fourth magnet 32 is magnetized along the direction from top to bottom.

[0045] As shown in FIGS. 5-8, according to some embodiments of the present application, the second magnetic circuit system 3 further includes a fifth magnet 33 disposed between the third magnet 31 and the fourth magnet 32 and extending along the first direction, and the third magnet 31, the fourth magnet 32, and the fifth magnet 33 form a Halbach array, and the magnetic field strengthening side of the Halbach array is located on the side of the second magnetic circuit system 3 facing the drive coil 522. Therefore, the magnetic field strength acting on the drive coil 522 can be further improved, and thus the vibration sensation of the second vibration system 5 can be improved.

[0046] In the specific example shown in FIGS. 5-8, the first magnetic circuit system 2 includes a center magnetic portion 22 and a side magnetic portion 23 disposed outside the center magnetic portion 22, the side magnetic portion 23 is spaced apart from the center magnetic portion 22 to form a magnetic gap, and the voice coil 42 is disposed in the magnetic gap away from the first diaphragm assembly 41. The side magnetic portion 23 includes a side magnet 231, and the center magnetic portion 22 includes four first sub-center magnets 221 spaced apart along a first direction (horizontal x direction), each of the first sub-center magnets 221 is magnetized along a second direction (vertical z direction), wherein the two first sub-center magnets 221 located at the ends of the first direction are end magnets 221c and have the same magnetization direction, and the magnetization directions of the two end magnets 221c are opposite to the magnetization direction of the side magnet 231 to form a magnetic circuit acting on the voice coil 42. The two first sub-center magnets 221 located at the middle position, i.e., the first magnet 221a and the second magnet 221b, form a middle magnet, and the magnetization directions of the first magnet 221a and the second magnet 221b are opposite, i.e., the four first sub-center magnets 221 of the center magnetic portion 22 along the first direction are sequentially the end magnet 221c, the first magnet 221a, the second magnet 221b, and the end magnet 221c. The second magnetic circuit system 3 includes three magnets, i.e., a third magnet 31, a fifth magnet 33, and a fourth magnet 32 sequentially distributed along the first direction, the third magnet 31, the fourth magnet 32, and the fifth magnet 33 are disposed on the side of the driving coil 522 away from the center magnetic portion 22, the third magnet 31 and the fourth magnet 32 are both magnetized along the second direction and have opposite magnetization directions, and the fifth magnet 33 is magnetized along the first direction, the third magnet 31 and the first magnet 221a are opposite along the second direction and have the same magnetization direction, and the fourth magnet 32 and the second magnet 221b are opposite along the second direction and have opposite magnetization directions.

[0047] For example, the side magnet 231 is magnetized along the direction from top to bottom, as shown in FIG. 5, along the first direction, the magnetization directions of the four first sub-center magnets 221 are sequentially from bottom to top, from top to bottom, from bottom to top, and from bottom to top, the third magnet 31 is magnetized along the direction from top to bottom, the fifth magnet 33 is magnetized along the direction from left to right, and the fourth magnet 32 is magnetized along the direction from bottom to top. Alternatively, for example, the side magnet 231 is magnetized along the direction from bottom to top, along the first direction, the magnetization directions of the four first sub-center magnets 221 are sequentially from top to bottom, from bottom to top, from top to bottom, and from top to bottom, the third magnet 31 is magnetized along the direction from bottom to top, the fifth magnet 33 is magnetized along the direction from right to left, and the fourth magnet 32 is magnetized along the direction from top to bottom.

[0048] Thus, by the above arrangement, the first magnet 221a, the third magnet 31, the fifth magnet 33, the fourth magnet 32 and the second magnet 221b form a complete magnetic circuit acting on the drive coil 522, the third magnet 31, the fifth magnet 33 and the fourth magnet 32 form a Halbach array with the field strengthening side on the side of the second magnetic circuit system 3 facing the drive coil 522, so that the magnetic field strength acting on the drive coil 522 can be further improved, and the vibration feeling of the second vibration system 5 can be improved.

[0049] As shown in FIGS. 1-2 and 5-6, according to some embodiments of the present application, the first magnetic circuit system 2 further comprises a magnetic conductive yoke 21, the magnetic conductive yoke 21 comprising a body portion 211 and a hollow hole 21a provided on the body portion 211, the center magnetic portion 22 and the side magnetic portion 23 being provided on the body portion 211, and the hollow hole 21a being at least partially opposite to the drive coil 522 along the second direction. Thus, by the above arrangement, the hollow hole 21a can be opposite to part of the drive coil 522 or opposite to the entire drive coil 522, so that it can be ensured that the drive coil 522 can smoothly cut the magnetic induction lines generated by the first magnetic circuit system 2, thereby ensuring the vibration effect of the second vibration system 5.

[0050] In some embodiments of the present application, the side magnetic portion 23 and the first sub-center magnets 221 located at both ends are provided on the body portion 211, so that the first sub-center magnets 221 located in the middle can be opposite to the drive coil 522 through the hollow hole 21a. Alternatively, in some other embodiments of the present application, the center magnetic portion 22 further comprises second sub-center magnets 222 provided at both ends of the third direction of the plurality of first sub-center magnets 221, the third direction being perpendicular to the first direction and the second direction, and the side magnetic portion 23 and the second sub-center magnets 222 being provided on the body portion 211. Thus, the plurality of first sub-center magnets 221 can be opposite to the drive coil 522 through the hollow hole 21a.

[0051] Alternatively, along the first direction, the two ends of the second sub-center magnets 222 are flush with the two ends of the plurality of first sub-center magnets 221, so that the two first sub-center magnets 221 and the two second sub-center magnets 222 located at the ends can form a uniform magnetic field cooperating with the side magnet 231, and the sound production effect of the first vibration system 4 can be ensured. Moreover, along the first direction, the two ends of the second sub-center magnets 222 are flush with the two ends of the plurality of first sub-center magnets 221, so that the overall structure of the first magnetic circuit system 2 can be more compact and regular, and assembly is facilitated.

[0052] In one specific example of the present application, the first magnetic circuit system 2 comprises a magnetic yoke 21, a central magnetic portion 22 and a side magnetic portion 23 arranged at the central magnetic portion 22 and spaced apart from the central magnetic portion 22 to form a magnetic gap, the side magnetic portion 23 comprises a side magnetic 231 arranged at the magnetic yoke 21 and a side magnetic plate 232 arranged at a side of the side magnetic 231 away from the magnetic yoke 21, and the central magnetic portion 22 comprises a central magnetic arranged at the magnetic yoke 21 and a central magnetic plate 223 arranged at a side of the central magnetic away from the magnetic yoke 21. The central magnetic comprises a plurality of first sub-central magnets 221 arranged in a first direction, and a second sub-central magnet 222 arranged at both ends of the plurality of first sub-central magnets 221 in a third direction, and the side of each of the first sub-central magnets 221 and the second sub-central magnet 222 away from the magnetic yoke 21 is connected to the central magnetic plate 223. The magnetic yoke 21 comprises a body portion 211 and a hollow hole 21a arranged at the body portion 211, the side magnetic portion 23 and the second sub-central magnet 222 are arranged at the body portion 211, and the plurality of first sub-central magnets 221 are opposite to the driving coil 522 through the hollow hole 21a.

[0053] As shown in FIG. 1 and FIG. 5, according to some embodiments of the present application, the vibrator assembly 52 further comprises a counterweight 521, both ends of the elastic connecting member 51 are connected to the counterweight 521 and the shell 1 respectively, the driving coil 522 is arranged at the counterweight 521, the counterweight 521 is provided with a through hole 521b, and at least part of the driving coil 522 is opposite to the second magnetic circuit system 3 along a second direction through the through hole 521b. Thus, through the above arrangement, the through hole 521b can be opposite to part of the driving coil 522 or the entire driving coil 522, thereby ensuring that the driving coil 522 can smoothly cut the magnetic induction lines generated by the second magnetic circuit system 3, so as to ensure the vibration effect of the second vibration system 5.

[0054] In one specific example of the present application, the side of the counterweight 521 close to the first magnetic circuit system 2 is provided with an assembly groove 521a, and the driving coil 522 is embedded in the assembly groove 521a, thereby making the structure of the vibrator assembly 52 more compact. Optionally, a fixing glue can be arranged in the assembly groove 521a, and the driving coil 522 can be fixed in the assembly groove 521a through the fixing glue. The side of the counterweight 521 close to the second magnetic circuit system 3 is provided with a through hole 521b, the through hole 521b is communicated with the assembly groove 521a, and part of the driving coil 522 is opposite to the second magnetic circuit system 3 through the through hole 521b.

[0055] As shown in FIG. 1 and FIG. 5, according to some embodiments of the present application, the shell 1 can include a main body part 11 and a bending part 12 arranged at the outer periphery of the main body part 11, the bending part 12 extends in a direction close to the first vibration system 4 relative to the main body part 11, one end of the elastic connecting piece 51 is fixed to the bending part 12, the main body part 11 is provided with a support block (not shown in the figure), the magnetic yoke 21 of the first magnetic circuit system 2 is supported and fixed to the support block, thereby the sound generating unit composed of the first vibration system 4 and the first magnetic circuit system 2 can be fixed and supported on the shell 1 through the support block.

[0056] In some embodiments of the present application, the outer periphery of the magnetic yoke 21 is provided with a positioning groove 21b, the bending part 12 is provided with a positioning protrusion arranged correspondingly to the positioning groove 21b, the positioning protrusion is inserted into the corresponding positioning groove 21b, thereby the positioning of the magnetic yoke 21 in the horizontal x direction and the horizontal y direction is realized through the cooperation of the positioning groove 21b and the positioning protrusion, the positioning of the magnetic yoke 21 in the vertical z direction can be realized through the support block, thereby the accurate positioning of the sound generating unit can be realized. One end of the elastic connecting piece 51 is connected to the bending part 12, the other end of the elastic connecting piece 51 is connected to the vibrator assembly 52, the vibrator assembly 52 can include a counterweight 521 and a drive coil 522 arranged on the counterweight 521, thereby the suspension of the motor unit in the installation space 1a is realized. The second vibration system 5 further includes a motor support sheet 53, one end of the motor support sheet 53 is electrically connected to the drive coil 522, the other end of the motor support sheet 53 is electrically connected to an external circuit.

[0057] In some embodiments of the present application, the bending part 12 is arranged flush with the outer periphery wall of the first magnetic circuit system 2, thereby the overall structure of the vibration sound generating device 100 can be more compact, and the occupied assembly space is less.

[0058] In some embodiments of the present application, the second magnetic circuit system 3 can be fixed to the main body part 11, optionally, the second magnetic circuit system 3 can be fixed to the main body part 11 by means of adhesive connection, or can be fixed to the main body part 11 by means of welding connection.

[0059] According to the electronic device of the second aspect of the embodiments of the present application, the vibration sound generating device 100 according to the above-mentioned embodiments of the present application is included. Optionally, the electronic device can be a mobile phone, a PAD, a notebook computer, etc.

[0060] According to the electronic device of the second aspect of the embodiments of the present application, by arranging the above-mentioned vibration sound generating device 100, the vibration sound generating device 100 has good sound generating effect and vibration effect, thereby the electronic device has good sound quality and vibration feedback effect, and the product market competitiveness of the electronic device is improved.

[0061] In the description of the application, it is necessary to understand that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or component referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the features defined with "first", "second" can be explicitly or implicitly include one or more of the features. In the description of the application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0062] In the description of the application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, and it can be the communication inside two components. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0063] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the application. In this specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0064] Although the embodiments of the application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirit of the application, and the scope of the application is defined by the claims and their equivalents.

Claims

1. A vibration sound-generating device, characterized in that: include: A housing, wherein the housing is made of metal or a composite of metal and plastic, and defines an installation space; a first magnetic circuit system connected to the housing, comprising a central magnetic portion and a side magnetic portion, wherein the side magnetic portion is disposed outside the central magnetic portion and spaced apart from the central magnetic portion to define a magnetic gap, and the central magnetic portion comprises a plurality of first sub-central magnets spaced apart along a first direction and magnetized along a second direction, wherein the first direction is perpendicular to the second direction; a first vibration system and a second vibration system, wherein the first vibration system vibrates along the second direction, and along the second direction, the first vibration system and the second vibration system are respectively arranged on opposite sides of the first magnetic circuit system, the first vibration system includes a diaphragm assembly and a voice coil, one end of the voice coil is connected to the diaphragm assembly, and the other end of the voice coil is arranged corresponding to the magnetic gap; the second vibration system is arranged in the installation space and vibrates along the first direction, the second vibration system includes an elastic connecting member and a vibrator assembly, two ends of the elastic connecting member are respectively connected to the vibrator assembly and the inner wall of the shell, the vibrator assembly includes a driving coil, the driving coil includes two oppositely arranged connecting edges, and along the second direction, the driving coil is arranged opposite to the central magnetic part; and A second magnetic circuit system is provided on a side of the drive coil facing away from the first magnetic circuit system, wherein the plurality of first sub-center magnets include a first magnet and a second magnet that are adjacent and have opposite magnetization directions, and the second magnetic circuit system includes a third magnet and a fourth magnet that have opposite magnetization directions. Along the second direction, the first magnet and the third magnet have the same magnetization direction and are located on opposite sides of one of the connecting edges, and the second magnet and the fourth magnet have the same magnetization direction and are located on opposite sides of the other connecting edge.

2. The vibration sound-generating device according to claim 1, characterized in that: Along the first direction, the first magnet or the second magnet is located at one end of the plurality of first sub-center magnets, and has the same magnetization direction as that of the first sub-center magnet located at the other end of the plurality of first sub-center magnets.

3. The vibration sound-generating device according to claim 1, wherein: Along the first direction, the plurality of first sub-center magnets include end magnets located at both ends and a middle magnet located between the two end magnets. The first magnet and the second magnet are the middle magnets, and the magnetization directions of the two end magnets are the same.

4. The vibration sound-generating device according to claim 1, characterized in that: The second magnetic circuit system also includes a fifth magnet arranged between the third magnet and the fourth magnet and extending along the first direction. The third magnet, the fourth magnet and the fifth magnet form a Halbach array, and the magnetic field strengthening side of the Halbach array is located on the side of the second magnetic circuit system facing the drive coil.

5. The vibration sound-generating device according to claim 1, characterized in that: The first magnetic circuit system also includes a magnetic yoke, which includes a main body and a hollow hole provided in the main body. The central magnetic part and the side magnetic part are provided in the main body. Along the second direction, the hollow hole is at least partially arranged opposite to the drive coil.

6. The vibration sound-generating device according to claim 5, characterized in that: The edge magnet portion and the first sub-center magnets located at both ends are both provided on the main body portion; Alternatively, the central magnetic portion further includes second sub-center magnets disposed at both ends of the first sub-center magnets in a third direction, the third direction being perpendicular to the first direction and the second direction respectively, and the edge magnetic portion and the second sub-center magnet are disposed on the main body portion.

7. The vibration sound-generating device according to claim 1, characterized in that: The vibrator assembly also includes a counterweight block, the two ends of the elastic connecting member are respectively connected to the counterweight block and the shell, the driving coil is arranged on the counterweight block, and a through hole is provided on the counterweight block. Along the second direction, at least part of the driving coil passes through the through hole and is opposite to the second magnetic circuit system.

8. The vibration sound-generating device according to any one of claims 1 to 7, characterized in that: The shell includes a main body and a bending portion arranged on the outer periphery of the main body, the bending portion is bent and extended relative to the main body toward the direction close to the first vibration system, one end of the elastic connecting member is fixed to the bending portion, and a support block is provided on the main body. The first magnetic circuit system also includes a magnetic yoke, the central magnetic portion and the side magnetic portion are arranged on the side of the magnetic yoke opposite to the diaphragm assembly, and the side of the magnetic yoke facing away from the diaphragm assembly is supported and fixed to the support block.

9. The vibration sound-generating device according to claim 8, characterized in that: A positioning groove is provided on the outer peripheral side of the magnetic yoke, and a positioning protrusion is provided on the bent portion corresponding to the positioning groove, and the positioning protrusion is inserted into the corresponding positioning groove; And / or, the bent portion is arranged flush with the outer peripheral wall of the first magnetic circuit system.

10. The vibration sound-generating device according to claim 8, characterized in that: The second magnetic circuit system is fixed to the main body.

11. An electronic device, characterized in that: The invention comprises a vibration sound-generating device according to any one of claims 1 to 10.

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