Vibration sound production device and electronic equipment

Abstract

The utility model discloses a vibration sounding device and electronic equipment. The vibration sounding device comprises a shell, a first magnetic circuit system, a first vibration system and a second vibration system. The central magnetic part and the side magnetic parts are arranged at intervals to define a magnetic gap, the central magnetic part comprises a plurality of first sub-central magnets which are distributed at intervals in the first direction, and at least part of the first sub-central magnets form a Halbach array; and the magnetizing direction of the first sub-center magnets located at the two ends of the center magnetic part in the first direction is opposite to the magnetizing direction of the side magnets. The first vibration system and the second vibration system are arranged on the two opposite sides of the first magnetic circuit system respectively, the first vibration system comprises a vibrating diaphragm assembly and a voice coil, the second vibration system comprises an elastic connecting piece and a vibrator assembly, the vibrator assembly is suspended in the installation space through the elastic connecting piece, the vibrator assembly comprises a driving coil, and the driving coil drives the vibrating diaphragm assembly to rotate in the second direction. The driving coil and the central magnetic part are oppositely arranged. The vibration sounding device provided by the utility model has good sounding and vibration effects.

Description

Technical Field

[0001] The utility model relates to the field of electroacoustic equipment, in particular to a vibration sound-generating device and an electronic device. Background Art

[0002] Smart terminal devices, especially mobile phones, usually need to provide both audio experience and vibration tactile feedback experience, where the audio experience comes from the sound unit and the vibration tactile feedback experience comes from the vibration unit.

[0003] In the related art, a vibration sound module is proposed in which a sound unit and a vibration unit are integrated into one. The sound unit and the vibration unit share a magnetic circuit system, which is used to provide driving force for the voice coil of the sound 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 structural design is difficult to take into account the sound sensitivity requirements of the sound unit and the vibration requirements of the motor unit, and cannot meet the user's use requirements for the terminal product. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a vibration sound-generating device, which has the advantages of simple and compact structure and good sound and vibration effects.

[0005] The utility model also provides an electronic device with the vibration sound-generating device.

[0006] According to the first aspect of the present invention, the vibration sound-generating device comprises: a shell, an installation space is defined in the shell; a first magnetic circuit system, the first magnetic circuit system comprises a magnetic yoke and a central magnetic part and a side magnetic part arranged on the magnetic yoke, the magnetic yoke is connected to the shell, the side magnetic part is arranged on the outside of the central magnetic part and is spaced from the central magnetic part to define a magnetic gap, the central magnetic part comprises a plurality of first sub-center magnets spaced apart along a first direction, and the side magnetic part comprises side magnets; a first vibration system and a second vibration system, the first vibration system vibrates along a second direction perpendicular to the first direction, and along the second direction, the first vibration system and the second vibration system are respectively arranged at opposite ends of the first magnetic circuit system. For both sides, 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 connector and a vibrator assembly, the two ends of the elastic connector are respectively connected to the vibrator assembly and the inner wall of the shell, the vibrator assembly includes a driving coil, and along the second direction, the driving coil is arranged opposite to the central magnetic part; wherein, at least part of the first sub-center magnet forms a Halbach array, and the magnetization direction of the first sub-center magnet located at both ends of the central magnetic part along the first direction is opposite to the magnetization direction of the side magnet.

[0007] According to the vibration sound-generating device of the first embodiment of the utility model, a Halbach array is formed by setting at least part of the first sub-center magnet, and the magnetization direction of the first sub-center magnets at both ends of the center magnetic part along the first direction is opposite to the magnetization direction of the side magnets, thereby ensuring that the driving force acting on the first vibration system meets the actual sound generation demand and the sound generation sensitivity of the vibration sound-generating device is ensured; and the magnetic flux lines generated by the Halbach array in the center magnetic part are concentrated on the driving coil, thereby ensuring that the driving force acting on the second vibration system meets the actual vibration sense demand and improves the vibration sense effect generated by the vibration sound-generating device. In addition, the vibration sound-generating device uses a set of magnetic circuit systems to drive the first vibration system and the second vibration system respectively, and uses part of the magnetic field of the center magnetic part as the magnetic field of the second vibration system, which can improve the utilization rate of the magnetic field of the center magnetic part, save a set of magnetic circuit systems, and reduce production costs. In addition, it can also save the assembly space occupied by a set of magnetic circuit systems, thereby meeting the miniaturization and lightweight design of the vibration sound-generating device.

[0008] According to some embodiments of the present invention, there are five first sub-center magnets, and the five first sub-center magnets together form a first Halbach array, and the magnetic field strengthening side of the first Halbach array is located on the side of the central magnetic part facing the driving coil.

[0009] In some embodiments of the utility model, the plurality of first sub-center magnets include a first magnet magnetized along the first direction and a second magnet magnetized along the second direction, the first Halbach array includes two first magnets and three second magnets, the three second magnets are spaced apart along the first direction and the second magnet located in the middle has a magnetization direction opposite to that of the second magnets located at both ends, the two first magnets have opposite magnetization directions, and each of the first magnets has a second magnet with opposite magnetization directions on both sides.

[0010] In some embodiments of the utility model, there are two driving coils, and the two driving coils are arranged opposite to the two first magnets, wherein each of the driving coils includes two oppositely arranged connecting edges, and along the second direction, the two connecting edges are arranged opposite to the second magnets on both sides of the corresponding first magnets.

[0011] According to some embodiments of the present invention, the central magnetic portion also includes second sub-center magnets arranged at both ends of the third direction of the plurality of first sub-center magnets, the third direction being perpendicular to the first direction and the second direction respectively, and along the first direction, both ends of the second sub-center magnet are flush with both ends of the plurality of first sub-center magnets.

[0012] According to some embodiments of the utility model, the plurality of first sub-center magnets include a plurality of third magnets located in the middle position and two fourth magnets arranged on both sides of the plurality of third magnets, the plurality of third magnets form a second Halbach array, the magnetic field strengthening side of the second Halbach array is located on the side of the central magnetic portion facing the drive coil, and the magnetization directions of the two fourth magnets are the same and opposite to the magnetization direction of the side magnets.

[0013] In some embodiments of the utility model, the vibration sound-generating device also includes a second magnetic circuit system, which is arranged on the side of the drive coil facing away from the first magnetic circuit system, and the second magnetic circuit system is provided with a plurality of fifth magnets forming a third Halbach array, and the magnetic field strengthening side of the third Halbach array is located on the side of the second magnetic circuit system facing the drive coil.

[0014] In some embodiments of the present invention, the third magnet at the middle position of the second Halbach array and the fifth magnet at the middle position of the third Halbach array are magnetized along the first direction and in opposite directions, and the third magnets at both ends of the second Halbach array have the same magnetization direction as the corresponding fifth magnets at both ends of the third Halbach array; and / or, the number of magnets in the second Halbach array is the same as the number of magnets in the third Halbach array.

[0015] In some embodiments of the utility model, the second Halbach array includes three third magnets, the third magnet located at the center is magnetized along the first direction, and the two third magnets located at both ends are magnetized along the second direction and the magnetization directions are opposite; the vibration sound-generating device also includes a second magnetic circuit system, the second magnetic circuit system is arranged on the side of the driving coil facing away from the first magnetic circuit system, the second magnetic circuit system includes two sixth magnets magnetized along the second direction and the magnetization directions are opposite, along the second direction, the two sixth magnets are opposite to the two third magnets located at both ends and have the same magnetization direction; wherein, there is one driving coil, and the driving coil has two connecting edges arranged oppositely, and along the second direction, each of the connecting edges is located between the third magnet and the sixth magnet arranged oppositely.

[0016] According to some embodiments of the utility model, the magnetic yoke includes a main body and a hollow hole arranged in the main body, the edge magnetic portion and the first sub-center magnet located at both ends are both arranged in the main body, and along the second direction, the hollow hole is at least partially opposite to the drive coil; or, the center magnetic portion also includes a second sub-center magnet arranged at both ends of the third direction of the plurality of first sub-center magnets, the edge magnetic portion and the second sub-center magnet are arranged in the main body, and along the second direction, the hollow hole is at least partially opposite to the drive coil.

[0017] According to some embodiments of the utility model, 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 in a direction close to the first vibration system, one end of the elastic connecting member is fixed to the bending portion, a support block is provided on the main body, and the magnetic yoke support is fixed to the support block.

[0018] In some embodiments of the utility model, a positioning groove is provided on the outer peripheral side of the magnetic yoke, and a positioning protrusion corresponding to the positioning groove is provided on the bending portion, and the positioning protrusion is inserted into the corresponding positioning groove; and / or the bending portion is flush with the outer peripheral wall of the first magnetic circuit system.

[0019] The electronic device according to the embodiment of the second aspect of the utility model comprises the vibration sound-generating device according to the above embodiment of the utility model.

[0020] According to the electronic device of the second aspect of the utility model, by setting the above-mentioned vibration sound-generating device, the structure design of the vibration sound-generating device is compact, and it also has good sound effect and vibration effect, which can meet the requirements of lightweight design of electronic equipment, and can also make the electronic equipment have both good sound quality and vibration feedback effect, thereby improving the product market competitiveness of the electronic equipment.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 It is a schematic diagram of the explosion structure of the vibration sound-generating device according to the first embodiment of the utility model;

[0024] Figure 2 is a vertical cross-sectional view of a vibration sound-generating device according to a first embodiment of the utility model;

[0025] Figure 3 Schematic diagram of the magnet arrangement of the magnetic circuit system of the vibration sound-generating device according to the first embodiment of the utility model;

[0026] Figure 4 Schematic diagram of the magnetization state of the magnetic circuit system of the vibration sound-generating device according to the first embodiment of the utility model;

[0027] Figure 5 It is a schematic diagram of the explosion structure of the vibration sound-generating device according to the second embodiment of the utility model;

[0028] Figure 6 is a vertical cross-sectional view of a vibration sound-generating device according to a second embodiment of the utility model;

[0029] Figure 7 Schematic diagram of the magnet arrangement of the magnetic circuit system of the vibration sound-generating device according to the second embodiment of the utility model;

[0030] Figure 8 Schematic diagram of the magnetization state of the magnetic circuit system of the vibration sound-generating device according to the second embodiment of the utility model;

[0031] Fig. 9 is a vertical cross-sectional view of a vibration sound-generating device according to a third embodiment of the utility model;

[0032] Fig.10 Schematic diagram of the magnet arrangement of the magnetic circuit system of the vibration sound-generating device according to the third embodiment of the utility model;

[0033] Fig.11 It is a schematic diagram of the magnetization state of the magnetic circuit system of the vibration sound-generating device according to the third embodiment of the utility model.

[0034] Reference numerals:

[0035] The vibration sound generating device 100,

[0036] Shell 1, installation space 1a, main body 11, bending portion 12,

[0037] The first magnetic circuit system 2, the magnetic yoke 21, the main body 211, the hollow hole 21a, the positioning groove 21b, the central magnetic part 22, the first sub-center magnet 221, the first magnet 221a, the second magnet 221b, the third magnet 221c, the fourth magnet 221d, the second sub-center magnet 222, the central magnetic plate 223, the side magnetic part 23, the side magnet 231, the side magnetic plate 232, the first Halbach array 2a, the second Halbach array 2b,

[0038] The second magnetic circuit system 3, the third Halbach array 3a, the fifth magnet 31, the sixth magnet 32,

[0039] The first vibration system 4, the diaphragm assembly 41, the diaphragm 411, the vibration plate 412, the voice coil 42, the centering support plate 43,

[0040] The second vibration system 5, the elastic connecting member 51, the vibrator assembly 52, the counterweight 521, the assembly groove 521a, the driving coil 522, the connecting edge 5221, and the motor support plate 53;

[0041] Basin rack 6. DETAILED DESCRIPTION

[0042] The embodiments of the present invention are described in detail below, and 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 cannot be understood as limiting the present invention.

[0043] Reference below Figure 1-Figure 11 The vibration sound-generating device 100 according to the first embodiment of the utility model is described in detail. The vibration sound-generating device 100 may be a speaker unit or a speaker module having both sound-generating and vibration functions.

[0044] like Figure 1-Figure 2 , Figure 5-Figure 6 as well as Fig. 9 As shown, the vibration sound-generating device 100 according to the first embodiment of the utility model includes: a shell 1, a first magnetic circuit system 2, a first vibration system 4 and a second vibration system 5.

[0045] The housing 1 may define an installation space 1a. The first magnetic circuit system 2 includes a magnetic yoke 21 and a central magnetic portion 22 and a side magnetic portion 23 provided on the magnetic yoke 21. The magnetic yoke 21 is connected to the housing 1. The side magnetic portion 23 is provided on the outside of the central magnetic portion 22 and is spaced apart from the central magnetic portion 22 to define a magnetic gap. The central magnetic portion 22 includes a plurality of first sub-central magnets 221 spaced apart along a first direction (e.g., a horizontal x direction), and the side magnetic portion 23 includes side magnets 231.

[0046] like Figure 2 , Figure 6 and Fig. 9 As shown, the first vibration system 4 vibrates along a second direction (e.g., vertical z direction) perpendicular to the first direction. Along the second direction, the first vibration system 4 and the second vibration system 5 are respectively arranged on opposite sides of the first magnetic circuit system 2. 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 installation space 1a and vibrates along the first direction. The second vibration system 5 includes an elastic connector 51 and a vibrator assembly 52. ​​The two ends of the elastic connector 51 are respectively connected to the vibrator assembly 52 and the inner wall of the housing 1. The elastic connector 51 can suspend the vibrator assembly 52 in the installation space 1a. The vibrator assembly 52 includes a driving coil 522. Along the second direction, the driving coil 522 is arranged opposite to the central magnetic part 22.

[0047] Specifically, the first magnetic circuit system 2 and the first vibration system 4 can constitute a sound unit of the vibration sound-generating device 100. Among them, the first vibration system 4 may include 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. Optionally, along the second direction, the other end of the voice coil 42 can be arranged relative 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 unit is working, current is passed through the voice coil 42, and the voice coil 42 vibrates back and forth along the second direction driven by the magnetic field force, thereby driving the diaphragm assembly 41 to vibrate and make sound, thereby achieving the sound effect of the sound unit. Optionally, the diaphragm assembly 41 may include a diaphragm 411 and a vibration plate 412 disposed on the diaphragm 411, the sound unit may further include a basin frame 6, the outer periphery of the diaphragm 411 may be fixed to the basin frame 6, one end of the voice coil 42 may be connected to the vibration plate 412, and the first magnetic circuit system 2 may be fixed to the basin frame 6. The first vibration system 4 may 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 basin frame 6, and the centering support 43 can balance the vibration of the voice coil 42, thereby improving the running stability of the first vibration system 4.

[0048] The first magnetic circuit system 2 and the second vibration system 5 can constitute the motor unit of the vibration sound-generating device 100. Among them, the second vibration system 5 may include an elastic connector 51 and a vibrator assembly 52, and the two ends of the elastic connector 51 are respectively connected to the vibrator assembly 52 and the inner wall of the shell 1. The vibrator assembly 52 may include a mass block and a driving coil 522 arranged on the mass block. Along the second direction, the driving coil 522 is arranged opposite to the central magnetic part 22 of the first magnetic circuit system 2. When the motor unit is working, current is passed through the driving coil 522, and the driving coil 522 vibrates back and forth under the drive of the magnetic field force of the central magnetic part 22, thereby enabling the motor unit to generate a vibration sense.

[0049] like Figure 2 , Figure 6 and Fig. 9 As shown, at least part of the first sub-center magnets 221 form a Halbach array, and the magnetization direction of the first sub-center magnets 221 located at both ends of the center magnetic portion 22 along the first direction is opposite to the magnetization direction of the side magnets 231. In other words, all of the first sub-center magnets 221 may form a Halbach array together, or a few of the first sub-center magnets 221 may form a Halbach array.

[0050] It can be understood that, since the central magnetic part 22 not only needs to cooperate with the side magnetic part 23 to form a magnetic gap that cooperates with the voice coil 42 to provide a driving force for driving the first vibration system 4 to vibrate, the central magnetic part 22 also needs to cooperate with the driving coil 522 to provide a driving force for driving the second vibration system 5 to vibrate. By setting at least part of the first sub-center magnet 221 to form a Halbach array, and the magnetizing direction of the first sub-center magnet 221 at both ends of the central magnetic part 22 along the first direction is opposite to the magnetizing direction of the side magnet 231, it can be ensured that the driving force acting on the first vibration system 4 meets the actual sound generation requirements and ensures the sound generation sensitivity of the vibration sound-generating device 100; moreover, the Halbach array can play a role in gathering magnetic flux lines, and can play a role in generating a stronger magnetic field strength under the condition of limited magnets. The magnetic flux lines generated by the Halbach array in the central magnetic part 22 can be concentrated on the driving coil 522, thereby ensuring that the driving force acting on the second vibration system 5 meets the actual vibration sense requirements and improves the vibration sense effect generated by the vibration sound-generating device 100.

[0051] According to the vibration sound-generating device 100 of the first aspect of the present invention, a Halbach array is formed by setting at least a portion of the first sub-center magnet 221, and the magnetizing direction of the first sub-center magnet 221 at both ends of the center magnetic part 22 along the first direction is opposite to the magnetizing direction of the side magnet 231, thereby ensuring that the driving force acting on the first vibration system 4 meets the actual sound generation requirements and ensures the sound generation sensitivity of the vibration sound-generating device 100; moreover, the magnetic flux lines generated by the Halbach array in the center magnetic part 22 can be concentrated on the driving coil 522, thereby also ensuring that the driving force acting on the second vibration system 5 meets the actual vibration sense requirements and enhances the vibration sense effect generated by the vibration sound-generating device 100. In addition, the vibration sound-generating device 100 uses a magnetic circuit system to drive the first vibration system 4 and the second vibration system 5 respectively, and uses part of the magnetic field of the central magnetic part 22 as the magnetic field of the second vibration system 5, which can improve the utilization rate of the magnetic field of the central magnetic part 22, save a magnetic circuit system, and reduce production costs. In addition, it can also save the assembly space occupied by a magnetic circuit system, thereby meeting the miniaturization and lightweight design of the vibration sound-generating device 100.

[0052] like Figure 3-Figure 4 As shown, according to some embodiments of the present invention, there are five first sub-center magnets 221, and the five first sub-center magnets 221 together form a first Halbach array 2a, and the magnetic field strengthening side of the first Halbach array 2a is located on the side of the central magnetic part 22 facing the drive coil 522. Specifically, the Halbach array plays a role in gathering magnetic flux lines on one side thereof, that is, forming a magnetic field strengthening side. By controlling all five first sub-center magnets 221 to form the first Halbach array 2a together, the magnetic field strength on the magnetic field strengthening side can be increased while meeting the sound generation requirements of the first vibration system 4, and along the second direction, the magnetic field strengthening side of the first Halbach array 2a is located on the side of the central magnetic part 22 facing the drive coil 522, thereby increasing the magnetic field strength acting on the drive coil 522, thereby improving the vibration effect of the second vibration system 5.

[0053] like Figure 2As shown, in some embodiments of the utility model, the plurality of first sub-center magnets 221 include first magnets 221a magnetized along the first direction and second magnets 221b magnetized along the second direction, the first Halbach array 2a includes two first magnets 221a and three second magnets 221b, the three second magnets 221b are spaced along the first direction and the second magnet 221b located in the middle position has a magnetization direction opposite to the second magnets 221b located at both ends, the two first magnets 221a have opposite magnetization directions, and both sides of each first magnet 221a are provided with second magnets 221b with opposite magnetization directions. For example, the first direction may be the horizontal x direction, and the second direction may be the vertical z direction, wherein the first sub-center magnet 221 magnetized along the horizontal direction x among the five first sub-center magnets 221 is the first magnet 221a, and the first sub-center magnet 221 magnetized along the vertical direction z among the five first sub-center magnets 221 is the second magnet 221b. The side magnets 231 of the first magnetic circuit system 2 are also magnetized in the vertical z direction and in the bottom-up direction. The two magnets at both ends of the first Halbach array 2a are both second magnets 221b and are magnetized in the top-down direction. The magnet in the middle position of the first Halbach array 2a is the second magnet 221b and is magnetized in the bottom-up direction. A first magnet 221a is provided between the second magnet 221b in the middle position and the two second magnets 221b at the two ends, and the two first magnets 221a are magnetized in the horizontal x direction toward the second magnet 221b close to the middle position.

[0054] Therefore, through the above design, the two second magnets 221b at both ends of the first Halbach array 2a are magnetized in opposite directions to the side magnets 231 to form a magnetic circuit acting on the voice coil 42, thereby meeting the sound production requirements of the first vibration system 4. The above-mentioned magnet arrangement of the first Halbach array 2a can form a magnetic field strengthening side on the side of the central magnetic part 22 facing the drive coil 522, thereby increasing the magnetic field strength acting on the drive coil 522 and enhancing the vibration effect of the second vibration system 5.

[0055] like Figure 2 As shown, in some embodiments of the present invention, there are two drive coils 522, and the two drive coils 522 are arranged opposite to the two first magnets 221a, wherein each drive coil 522 includes two oppositely arranged connecting edges 5221, and along the second direction, the two connecting edges 5221 are arranged opposite to the second magnets 221b on both sides of the corresponding first magnet 221a, thereby the connecting edge 5221 of each drive coil 522 can be placed at a position where the magnetic flux lines are concentrated, thereby increasing the magnetic field strength acting on the drive coil 522 and improving the vibration effect of the second vibration system 5. It should be noted that the number of drive coils 522 is not limited to two, and can be selected and set according to actual use requirements, and the present invention does not impose specific restrictions on this.

[0056] like Figure 4 , Figure 8 and Fig.11 As shown, according to some embodiments of the utility model, the central magnetic part 22 also includes a second sub-center magnet 222 disposed 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 respectively, and along the first direction, the two ends of the second sub-center magnet 222 are flush with the two ends of the plurality of first sub-center magnets 221, thereby, the two first sub-center magnets 221 and the two second sub-center magnets 222 located at the end can form a uniform magnetic field that cooperates with the side magnets 231, and can ensure the sound effect of the first vibration system 4. Moreover, along the first direction, the two ends of the second sub-center magnet 222 are flush with the two ends of the plurality of first sub-center magnets 221, thereby making the overall structure of the first magnetic circuit system 2 more compact and regular, and convenient for assembly.

[0057] like Figure 6 and Fig. 9 As shown, according to some embodiments of the utility model, the plurality of first sub-center magnets 221 include a plurality of third magnets 221c located in the middle position and two fourth magnets 221d arranged on both sides of the plurality of third magnets 221c. The plurality of third magnets 221c form a second Halbach array 2b. The magnetic field strengthening side of the second Halbach array 2b is located on the side of the central magnetic portion 22 facing the driving coil 522. The magnetization directions of the two fourth magnets 221d are the same and opposite to the magnetization direction of the side magnets 231.

[0058] For example, the first direction may be the horizontal x direction (left-right direction), the second direction may be the vertical z direction (up-down direction), the side magnet 231 of the first magnetic circuit system 2 is also magnetized along the vertical z direction and magnetized in the direction from top to bottom, the two fourth magnets 221d are magnetized along the vertical z direction and magnetized in the direction from bottom to top, the third magnet 221c is formed of three, the third magnet 221c located in the middle position is magnetized along the horizontal x direction (from right to left), the two third magnets 221c located at the two end positions are magnetized in the vertical z direction, the third magnet 221c on the left side of the third magnet 221c in the middle position is magnetized in the direction from top to bottom, and the third magnet 221c on the right side of the third magnet 221c in the middle position is magnetized in the direction from bottom to top. Thus, the three third magnets 221c in the middle position form the second Halbach array 2b, and the magnetic field strengthening side of the second Halbach array 2b is located on the side of the central magnetic part 22 facing the drive coil 522, thereby increasing the magnetic field strength acting on the drive coil 522. Moreover, the two fourth magnets 221d located on the left and right sides of the second Halbach array 2b have opposite magnetization directions to the side magnets 231 to form a magnetic circuit acting on the voice coil 42 to meet the sound generation requirements of the first vibration system 4.

[0059] like Figure 5-Figure 8 As shown, in some embodiments of the utility model, the vibration sound-generating device 100 also includes a second magnetic circuit system 43, and the second magnetic circuit system 43 is arranged on the side of the driving coil 522 facing away from the first magnetic circuit system 2. The second magnetic circuit system 43 is provided with a plurality of fifth magnets 31 constituting a third Halbach array 3a. The magnetic field strengthening side of the third Halbach array 3a is located on the side of the second magnetic circuit system 43 facing the driving coil 522. Thus, the first magnetic circuit system 2 and the second magnetic circuit system 43 respectively form a Halbach array with the magnetic field strengthening side facing the driving coil 522, thereby further enhancing the magnetic field strength acting on the driving coil 522 and further enhancing the vibration effect of the second vibration system 5.

[0060] like Figure 6 As shown, in some embodiments of the present invention, the third magnet 221c at the middle position of the second Halbach array 2b and the fifth magnet 31 at the middle position of the third Halbach array 3a are magnetized along the first direction and in opposite directions, and the third magnets 221c at both ends of the second Halbach array 2b and the corresponding fifth magnets 31 at both ends of the third Halbach array 3a have the same magnetization direction. Therefore, the second Halbach array 2b and the third Halbach array 3a can generate a closed magnetic flux loop acting on the drive coil 522, thereby increasing the magnetic field strength acting on the drive coil 522.

[0061] Optionally, the number of magnets in the second Halbach array 2b is the same as the number of magnets in the third Halbach array 3a. Figure 6 As shown, the second Halbach array 2b includes three third magnets 221c, and the third Halbach array 3a includes three fifth magnets 31, wherein the third magnet 221c located in the middle position is magnetized from right to left along the horizontal x direction, the third magnet 221c on the left side of the third magnet 221c located in the middle position is magnetized from top to bottom along the vertical z direction, and the third magnet 221c on the right side of the third magnet 221c located in the middle position is magnetized from bottom to top along the vertical z direction. The fifth magnet 31 located in the middle position is magnetized from left to right along the horizontal x direction, the fifth magnet 31 on the left side of the fifth magnet 31 located in the middle position is magnetized from top to bottom along the vertical z direction, and the fifth magnet 31 on the right side of the fifth magnet 31 located in the middle position is magnetized from bottom to top along the vertical z direction. Therefore, through the above-mentioned setting, the magnetic flux lines on both sides of the driving coil 522 can be distributed more evenly, thereby improving the vibration effect of the second vibration system 5.

[0062] like Figure 9-11As shown, in some embodiments of the utility model, the second Halbach array 2b includes three third magnets 221c, the third magnet 221c located at the center is magnetized along the first direction, and the two third magnets 221c located at both ends are magnetized along the second direction and the magnetization directions are opposite; the vibration sound-generating device 100 also includes a second magnetic circuit system 43, the second magnetic circuit system 43 is arranged on the side of the driving coil 522 facing away from the first magnetic circuit system 2, the second magnetic circuit system 43 includes two sixth magnets 32 magnetized along the second direction and the magnetization directions are opposite, along the second direction, the two sixth magnets 32 are opposite to the two third magnets 221c located at the two ends and have the same magnetization direction, wherein there is one driving coil 522, and the driving coil 522 has two connecting edges 5221 arranged oppositely, and along the second direction, each connecting edge 5221 is located between the third magnet 221c and the sixth magnet 32 ​​arranged oppositely.

[0063] For example, the second Halbach array 2b includes three third magnets 221c, and the third Halbach array 3a includes two sixth magnets 32, wherein the third magnet 221c located in the middle position is magnetized from right to left along the horizontal x direction, the third magnet 221c on the left side of the third magnet 221c in the middle position is magnetized from top to bottom along the vertical z direction, and the third magnet 221c on the right side of the third magnet 221c in the middle position is magnetized from bottom to top along the vertical z direction. The sixth magnet 32 ​​located on the left side is magnetized from top to bottom along the vertical z direction, and the sixth magnet 32 ​​located on the right side is magnetized from bottom to top along the vertical z direction. Thus, through the above design, the second magnetic circuit system 43 can further enhance the magnetic field strength acting on the drive coil 522, and the two sixth magnets 32 and the two third magnets 221c located at the two end positions are arranged correspondingly and form a magnetic flux loop acting on the drive coil 522, thereby enhancing the vibration effect of the second vibration system 5.

[0064] like Figure 1-Figure 2 , Figure 5-Figure 6As shown, according to some embodiments of the utility model, the magnetic yoke 21 includes a main body 211 and a hollow hole 21a provided on the main body 211, the edge magnetic part 23 and the first sub-center magnet 221 located at both ends are provided on the main body 211, and along the second direction, the hollow hole 21a is at least partially opposite to the driving coil 522; or, the central magnetic part 22 also includes a second sub-center magnet 222 provided at both ends of the third direction of the plurality of first sub-center magnets 221, the edge magnetic part 23 and the second sub-center magnet 222 are provided on the main body 211, and along the second direction, the hollow hole 21a is at least partially opposite to the driving coil 522. By providing the hollow hole 21a on the main body 211, the hollow hole 21a can be opposite to part of the driving coil 522, or to the entire driving coil 522, thereby ensuring that the driving coil 522 can smoothly cut the magnetic flux lines, thereby ensuring the vibration effect of the second vibration system 5.

[0065] In a specific example of the present invention, the first magnetic circuit system 2 includes a magnetic yoke 21 and a central magnetic portion 22 and a side magnetic portion 23 provided on the magnetic yoke 21. The side magnetic portion 23 is provided on the outside of the central magnetic portion 22 and is spaced apart from the central magnetic portion 22 to form a magnetic gap. The side magnetic portion 23 includes a side magnet 231 provided on the magnetic yoke 21 and a side magnetic conductive plate 232 provided on the side of the side magnet 231 away from the magnetic yoke 21. The central magnetic portion 22 includes a central magnet provided on the magnetic yoke 21 and a central magnetic conductive plate 223 provided on the side of the central magnet away from the magnetic yoke 21. The central magnet includes a plurality of first sub-central magnets 221 spaced apart along the first direction, and second sub-central magnets 222 provided at both ends of the plurality of first sub-central magnets 221 in the third direction. The side of each of the first sub-central magnet 221 and the second sub-central magnet 222 away from the magnetic yoke 21 is connected to the central magnetic conductive plate 223. The magnetic yoke 21 includes a main body 211 and a hollow hole 21 a provided in the main body 211 . The side magnetic part 23 and the second sub-center magnet 222 are provided in the main body 211 . The plurality of first sub-center magnets 221 are opposite to the driving coil 522 through the hollow hole 21 a .

[0066] like Figure 1 and Figure 5 As shown, according to some embodiments of the utility model, the shell 1 may include a main body 11 and a bending portion 12 arranged on the outer periphery of the main body 11, the bending portion 12 is bent and extended relative to the main body 11 in a direction close to the first vibration system 4, one end of the elastic connecting member 51 is fixed to the bending portion 12, a support block (not shown) is provided on the main body 11, and the magnetic yoke 21 is supported and fixed on the support block, thereby, the sound unit composed of the first vibration system 4 and the first magnetic circuit system 2 can be fixedly supported on the shell 1 by the support block.

[0067] In some embodiments of the utility model, a positioning groove 21b is provided on the outer peripheral side of the magnetic yoke 21, and a positioning protrusion corresponding to the positioning groove 21b is provided on the bending portion 12, and the positioning protrusion is inserted into the corresponding positioning groove 21b, thereby, the magnetic yoke 21 realizes its positioning in the horizontal x direction and the horizontal y direction through the cooperation between the positioning groove 21b and the positioning protrusion, and the magnetic yoke 21 can realize the positioning in the vertical z direction through the support block, thereby realizing the precise positioning of the sound unit. One end of the elastic connecting member 51 is connected to the bending portion 12, and the other end of the elastic connecting member 51 is connected to the vibrator assembly 52, and the vibrator assembly 52 may include a counterweight block 521 and a driving coil 522 arranged on the counterweight block 521, thereby the motor unit is suspended in the installation space 1a. Among them, the second vibration system 5 also includes a motor support plate 53, one end of the motor support plate 53 is electrically connected to the driving coil 522, and the other end of the motor support plate 53 is connected to the external circuit component.

[0068] In a specific example of the present invention, a mounting groove 521a is provided on one side of the counterweight 521 close to the first magnetic circuit system 2, and the drive coil 522 is embedded in the mounting groove 521a, thereby making the structure of the vibrator assembly 52 more compact. Optionally, a fixing glue can be provided in the mounting groove 521a, and the drive coil 522 can be fixed in the mounting groove 521a by the fixing glue. It should be noted that the structural design of the counterweight 521 is not limited to this. For example, the counterweight 521 may not be provided with the mounting groove 521a, and the drive coil 522 may be bonded to the outer surface of the counterweight 521.

[0069] In some embodiments of the present invention, the bending portion 12 is arranged flush with the outer peripheral wall of the first magnetic circuit system 2, thereby making the overall structure of the vibration sound-generating device 100 more compact and occupying less assembly space.

[0070] The electronic device according to the second embodiment of the utility model comprises the vibration sound-generating device 100 according to the above embodiment of the utility model. Optionally, the electronic device can be a mobile phone, a PAD, a laptop computer, etc.

[0071] According to the electronic device of the embodiment of the second aspect of the utility model, by setting the above-mentioned vibration sound-generating device 100, the structural design of the vibration sound-generating device 100 is compact, and the assembly space occupied is small, and it also has good sound effect and vibration effect, so that it can meet the requirements of lightweight design of electronic equipment, and can also make the electronic equipment have both good sound quality and vibration feedback effect, thereby improving the product market competitiveness of the electronic equipment.

[0072] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0073] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0074] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", 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 utility model. In this specification, the schematic representation 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.

[0075] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A vibration sound-generating device, characterized in that: include: a housing, wherein an installation space is defined within the housing; A first magnetic circuit system, the first magnetic circuit system comprises a magnetic yoke and a central magnetic part and a side magnetic part arranged on the magnetic yoke, the magnetic yoke is connected to the housing, the side magnetic part is arranged outside the central magnetic part and is spaced from the central magnetic part to define a magnetic gap, the central magnetic part comprises a plurality of first sub-central magnets spaced apart along a first direction, and the side magnetic part comprises side magnets; a first vibration system and a second vibration system, wherein the first vibration system vibrates along a second direction perpendicular to the first 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 comprises 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 comprises 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, and the vibrator assembly comprises a driving coil, and along the second direction, the driving coil is arranged opposite to the central magnetic part; At least part of the first sub-center magnets form a Halbach array, and the magnetization direction of the first sub-center magnets located at two ends of the central magnetic portion along the first direction is opposite to the magnetization direction of the side magnets.

2. The vibration sound-generating device according to claim 1, characterized in that: There are five first sub-center magnets, and the five first sub-center magnets together form a first Halbach array. The magnetic field strengthening side of the first Halbach array is located on the side of the central magnetic part facing the driving coil.

3. The vibration sound-generating device according to claim 2, characterized in that: The plurality of first sub-center magnets include a first magnet magnetized along the first direction and a second magnet magnetized along the second direction, the first Halbach array includes two first magnets and three second magnets, the three second magnets are spaced apart along the first direction and the second magnet located in the middle has a magnetization direction opposite to that of the second magnets located at both ends, the two first magnets have opposite magnetization directions, and each of the first magnets has a second magnet with opposite magnetization directions on both sides.

4. The vibration sound-generating device according to claim 3, characterized in that: There are two driving coils, and the two driving coils are arranged opposite to the two first magnets, wherein each driving coil includes two oppositely arranged connecting edges, and along the second direction, the two connecting edges are arranged opposite to the second magnets on both sides of the corresponding first magnets.

5. The vibration sound-generating device according to claim 1, characterized in that: The central magnetic part also includes second sub-center magnets arranged at both ends of the third direction of the plurality of first sub-center magnets, the third direction is perpendicular to the first direction and the second direction respectively, and along the first direction, both ends of the second sub-center magnet are flush with both ends of the plurality of first sub-center magnets.

6. The vibration sound-generating device according to claim 1, characterized in that: The multiple first sub-center magnets include multiple third magnets located in the middle position and two fourth magnets arranged on both sides of the multiple third magnets. The multiple third magnets form a second Halbach array. The magnetic field strengthening side of the second Halbach array is located on the side of the central magnetic part facing the driving coil. The magnetization directions of the two fourth magnets are the same and opposite to the magnetization direction of the side magnets.

7. The vibration sound-generating device according to claim 6, characterized in that: The vibration sound-generating device also includes a second magnetic circuit system, which is arranged on the side of the drive coil facing away from the first magnetic circuit system. The second magnetic circuit system is provided with a plurality of fifth magnets forming a third Halbach array, and the magnetic field strengthening side of the third Halbach array is located on the side of the second magnetic circuit system facing the drive coil.

8. The vibration sound-generating device according to claim 7, characterized in that: The third magnet in the middle of the second Halbach array and the fifth magnet in the middle of the third Halbach array are magnetized along the first direction and in opposite directions, and the third magnets at both ends of the second Halbach array have the same magnetization direction as the corresponding fifth magnets at both ends of the third Halbach array; And / or, the number of magnets in the second Halbach array is the same as the number of magnets in the third Halbach array.

9. The vibration sound-generating device according to claim 6, characterized in that: The second Halbach array includes three third magnets, the third magnet located at the center is magnetized along the first direction, and the two third magnets located at both ends are magnetized along the second direction and in opposite directions; the vibration sound-generating device also includes a second magnetic circuit system, the second magnetic circuit system is arranged on the side of the driving coil facing away from the first magnetic circuit system, the second magnetic circuit system includes two sixth magnets magnetized along the second direction and in opposite directions, and along the second direction, the two sixth magnets are opposite to the two third magnets located at both ends one by one and have the same magnetization direction; There is one driving coil, and the driving coil has two connecting edges that are arranged opposite to each other. Along the second direction, each of the connecting edges is located between the third magnet and the sixth magnet that are arranged opposite to each other.

10. The vibration sound-generating device according to any one of claims 1 to 9, characterized in that: The magnetic yoke comprises a main body and a hollow hole provided in the main body. The side magnets and the first sub-center magnets at both ends are both disposed on the main body, and along the second direction, the hollow holes are at least partially disposed opposite to the driving coil; Alternatively, the central magnetic portion also includes second sub-center magnets arranged at both ends of the first sub-center magnets in the third direction, the side magnetic portion and the second sub-center magnet are arranged on the main body, and along the second direction, the hollow hole is at least partially arranged opposite to the drive coil.

11. The vibration sound-generating device according to any one of claims 1 to 9, 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 a direction close to the first vibration system, one end of the elastic connecting member is fixed to the bending portion, a support block is provided on the main body, and the magnetic yoke support is fixed to the support block.

12. The vibration sound-generating device according to claim 11, characterized in that: A positioning groove is provided on the outer peripheral side of the magnetic yoke, and a positioning protrusion corresponding to the positioning groove is provided on the bent portion, 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.

13. An electronic device, characterized in that: It comprises a vibration sound-generating device according to any one of claims 1-12.

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