CN118200817A - Vibration sounding device and electronic equipment - Google Patents

Abstract

The invention discloses a vibration sounding device and electronic equipment. The first magnetic circuit system includes 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, the second vibration system comprises a vibrator assembly and comprises a driving coil, the driving coil comprises two oppositely arranged connecting edges, the second magnetic circuit system is arranged on one side of the driving coil, which is opposite to the central magnetic part, the central magnetic part comprises a first magnet and a second magnet which are adjacent and opposite in magnetizing direction, the second magnetic circuit system comprises a third magnet and a fourth magnet opposite in magnetizing direction, the first magnet and the third magnet are identical in magnetizing direction along the first direction and are positioned on two opposite sides of one connecting edge, and the second magnet and the fourth magnet are identical in magnetizing direction and are positioned on two opposite sides of the other connecting edge. The vibration sounding device has good sounding and vibration effects.

Description

Vibration sound generating device and electronic equipment

Technical Field

The present invention relates to the field of electroacoustic equipment, and in particular to a vibration sound-generating device and an electronic device.

Background technique

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.

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.

Summary of the invention

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

The invention also provides an electronic device having the vibration sound-generating device.

According to a first aspect of the present invention, a vibration sound-generating device includes: a shell, the shell is a metal material or a composite of a metal material and a plastic material, and an installation space is defined in the shell; a first magnetic circuit system, the first magnetic circuit system is connected to the shell, the first magnetic circuit system includes a central magnetic part and a side magnetic part, 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 includes a plurality of first sub-center magnets spaced along a first direction and magnetized along a second direction, the first direction is perpendicular to the second direction; a first vibration system and a second vibration system, 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 corresponds to the magnetic gap. Setting: 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, the 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, along the second direction, the driving coil and the central magnetic part are arranged opposite to each other; 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, wherein a plurality of the first sub-center magnets include adjacent first magnets and second magnets with opposite magnetization directions, the second magnetic circuit system includes third magnets and fourth magnets with 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 another connecting edge.

According to the vibration sound-generating device of the first aspect of the present invention, a second magnetic circuit system is arranged on the side of the driving coil facing away from the first magnetic circuit system. The third magnet and the fourth magnet in the second magnetic circuit system are opposite to the first magnet and the second magnet in the first magnetic circuit system in pairs along the second direction and together form a complete magnetic circuit that acts on the driving coil. This can increase the magnetic field strength acting on the driving coil and improve the BL value of the driving coil, thereby enhancing the vibration generated by the second vibration system and improving the vibration effect of the vibration sound-generating device. In addition, the first vibration system and the second vibration system of the vibration sound-generating device share the first magnetic circuit system. On the premise of meeting the sound generation requirements of the first vibration system, a part of the magnetic field in the first magnetic circuit system can be applied to the driving coil to improve the vibration of the second vibration system, thereby improving the magnetic field utilization rate of the first magnetic circuit system.

According to some embodiments of the present invention, 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 the first sub-center magnet located at the other end of the plurality of first sub-center magnets.

According to some embodiments of the present invention, 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.

According to some embodiments of the present invention, the second magnetic circuit system also includes a fifth magnet disposed 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.

According to some embodiments of the present invention, the first magnetic circuit system also includes a magnetic yoke, the magnetic yoke includes a main body and a hollow hole arranged in the main body, the central magnetic part and the side magnetic part are arranged in the main body, and along the second direction, the hollow hole is at least partially arranged opposite to the driving coil.

In some embodiments of the present invention, the edge magnetic portion and the first sub-center magnet located at both ends are both arranged on the main body; or, the center magnetic portion also includes second sub-center magnets arranged at both ends of a third direction of the plurality of first sub-center magnets, the third direction is respectively perpendicular to the first direction and the second direction, and the edge magnetic portion and the second sub-center magnet are arranged on the main body.

According to some embodiments of the present invention, the vibrator assembly also includes a counterweight block, 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 is opposite to the second magnetic circuit system through the through hole.

According to some embodiments of the present invention, 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 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.

In some embodiments of the present invention, a positioning groove is provided on the outer peripheral side of the magnetic yoke, and a positioning protrusion is provided on the bending portion corresponding to the positioning groove, 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.

In some embodiments of the present invention, the second magnetic circuit system is fixed to the main body.

The electronic device according to the embodiment of the second aspect of the present invention comprises the vibration sound-generating device according to the above-mentioned embodiment of the present invention.

The electronic device according to the second aspect of the embodiment of the present invention has good sound effect and vibration effect by setting the above-mentioned vibration sound-generating device, so that the electronic device has both good sound quality and vibration feedback effect, thereby improving the product market competitiveness of the electronic device.

Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

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:

FIG1 is a schematic diagram of an exploded structure of a vibration sound-generating device according to a first embodiment of the present invention;

2 is a vertical cross-sectional view of a vibration sound-generating device according to a first embodiment of the present invention;

3 is a schematic diagram of the magnet arrangement of the magnetic circuit system of the vibration sound-generating device according to the first embodiment of the present invention;

4 is a schematic diagram of a magnetization state of a magnetic circuit system of a vibration sound-generating device according to a first embodiment of the present invention;

FIG5 is a schematic diagram of an exploded structure of a vibration sound-generating device according to a second embodiment of the present invention;

6 is a vertical cross-sectional view of a vibration sound-generating device according to a second embodiment of the present invention;

7 is a schematic diagram of the magnet arrangement of the magnetic circuit system of the vibration sound-generating device according to the second embodiment of the present invention;

FIG. 8 is a schematic diagram showing the magnetization state of the magnetic circuit system of the vibration sound-generating device according to the second embodiment of the present invention.

Reference numerals:

The vibration sound generating device 100,

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

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 end magnet 221c, 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 second magnetic circuit system 3, the third magnet 31, the fourth magnet 32, the fifth magnet 33,

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,

The second vibration system 5, the elastic connecting member 51, the vibrator assembly 52, the counterweight 521, the assembly groove 521a, the through hole 521b, the driving coil 522, the connecting edge 5221, the motor support plate 53,

Basin rack 6.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar components or components with 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.

The vibration sound-generating device 100 according to the first aspect of the present invention will be described in detail below with reference to FIGS. 1 to 8 . The vibration sound-generating device 100 may be a speaker unit or a speaker module having both sound-generating and vibration functions.

As shown in FIGS. 1-2 and 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.

The shell 1 may be made of metal material or a composite of metal material and plastic material. For example, the shell 1 may be made of stainless steel. The shell 1 may also include at least two parts, one of which is a metal material and the other is a plastic material. An installation space 1a may be defined in the shell 1. The first magnetic circuit system 2 may 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 outside 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-central magnets 221 spaced apart along a first direction (e.g., horizontal x direction) and magnetized along a second direction (e.g., vertical z direction). The first direction is perpendicular to the second direction.

As shown in FIG. 2 and FIG. 4 , the first vibration system 4 vibrates along the second direction (e.g., the vertical z 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. The driving coil 522 includes two oppositely arranged connecting edges 5221. Along the second direction, the driving coil 522 is arranged opposite to the central magnetic part 22.

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 piece 43, one end of the centering support piece 43 is connected to the bottom of the voice coil 42, and the other end of the centering support piece 43 is connected to the basin frame 6, and the centering support piece 43 can balance the vibration of the voice coil 42, thereby improving the running stability of the first vibration system 4.

As shown in Figures 2 and 6, the second magnetic circuit system 3 can be arranged on the side of the driving coil 522 facing away from the first magnetic circuit system 2, wherein the multiple first sub-center magnets 221 include adjacent first magnets 221a and second magnets 221b with opposite magnetization directions, and the second magnetic circuit system 3 includes a third magnet 31 and a fourth magnet 32 with opposite magnetization directions. Along the second direction, the first magnet 221a and the third magnet 31 have the same magnetization direction and are located on opposite sides of a connecting edge 5221, and the second magnet 221b and the fourth magnet 32 have the same magnetization direction and are located on opposite sides of another connecting edge 5221.

The first magnetic circuit system 2, the second magnetic circuit system 3 and the second vibration system 5 can constitute the motor unit of the vibration sound-generating device 100. The second vibration system 5 can 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 housing 1. The vibrator assembly 52 can include a counterweight 521 and a driving coil 522 arranged on the counterweight 521. The first magnet 221a and the second magnet 221b in the first magnetic circuit system 2 and the third magnet 31 and the fourth magnet 32 in the second magnetic circuit system 3 are magnetized along the second direction, and the magnetization directions of the first magnet 221a and the second magnet 221b are opposite, the magnetization directions of the third magnet 31 and the fourth magnet 32 are opposite, the magnetization directions of the first magnet 221a and the third magnet 31 are the same, and the magnetization directions of the second magnet 221b and the fourth magnet 32 are the same. Along the second direction, the first magnet 221a and the third magnet 31 are located on opposite sides of one of the connecting edges 5221 of the driving coil 522, and the second magnet 221b and the fourth magnet 32 are located on opposite sides of the other connecting edge 5221 of the driving coil 522. Thus, the magnetic flux lines of the first magnet 221a, the third magnet 31, the fourth magnet 32 and the second magnet 221b form a complete magnetic circuit. When the motor unit is working, current flows into the driving coil 522, and the driving coil 522 vibrates back and forth under the driving force of the magnetic field force of the magnetic circuit formed by the first magnet 221a, the third magnet 31, the fourth magnet 32 and the second magnet 221b, thereby causing the motor unit to generate a vibration sense.

It is understandable 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 to drive 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 to drive the second vibration system 5 to vibrate. By arranging the second magnetic circuit system 3 on the side of the driving coil 522 facing 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 are opposite to each other in the second direction and together form a complete magnetic circuit, thereby increasing the magnetic field strength acting on the driving coil 522, improving the BL value of the driving coil 522, and thus enhancing the vibration generated by the second vibration system 5.

According to the vibration sound-generating device 100 of the first aspect of the embodiment of the present invention, by arranging the second magnetic circuit system 3 on the side of the driving coil 522 facing 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 are opposite to each other in the second direction and together form a complete magnetic circuit that acts on the driving coil 522, thereby increasing the magnetic field strength acting on the driving coil 522 and improving the BL value of the driving coil 522, thereby enhancing the vibration sense generated by the second vibration system 5 and improving the vibration sense effect generated by the vibration sound-generating device 100; 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 on the premise of meeting the sound generation requirements of the first vibration system 4, a part of the magnetic field in the first magnetic circuit system 2 can be applied to the driving coil 522 to improve the vibration sense of the second vibration system 5, thereby improving the magnetic field utilization rate of the first magnetic circuit system 2.

According to some embodiments of the present invention, 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 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, and the magnet at one end is the first magnet 221a or the second magnet 221b, the first magnet 221a and the second magnet 221b are adjacently arranged 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 located at the end, thereby, the first magnet 221a or the second magnet 221b located at the end cooperates with the edge magnet portion 23 to form a magnetic circuit acting on the voice coil 42, and cooperates with the third magnet 31 and the fourth magnet 32 to form a magnetic circuit acting on the drive coil 522, and the structural design is relatively simple and compact.

As shown in FIG. 2 and FIG. 6, according to some embodiments of the present invention, along the first direction, the plurality of first sub-center magnets 221 include end magnets 221c located at both ends and a middle magnet located between the two end magnets 221c, the first magnet 221a and the second magnet 221b are middle 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, the side magnetic circuit may include a side magnet 231, and 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 middle magnets located at the two end magnets 221c. Therefore, 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 drive coil 522, and the two end magnets 221c cooperate with the side magnets 231 to form a magnetic circuit acting on the voice coil 42, thereby ensuring the sound sensitivity requirements of the first vibration system 4 and the vibration feedback effect of the second vibration system 5 at the same time, and then ensuring the sound effect and vibration feedback effect of the vibration sound-generating device 100.

In the specific example shown in FIGS. 1 to 4 , the first magnetic circuit system 2 includes a central magnetic portion 22 and a side magnetic portion 23 disposed outside the central magnetic portion 22. The side magnetic portion 23 is spaced apart from the central magnetic portion 22 to form a magnetic gap, and the voice coil 42 is inserted into the magnetic gap away from the first diaphragm assembly 41. The side magnetic portion 23 includes side magnets 231, and the central magnetic portion 22 includes four first sub-center magnets 221 spaced apart along a first direction (horizontal x direction). Each first sub-center magnet 221 is magnetized along a second direction (vertical z direction), wherein the two first sub-center magnets 221 located at both ends of the first direction are end magnets 221c and have the same magnetization direction, and the magnetization direction of the two end magnets 221c is opposite to the magnetization direction of the side magnets 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 the first magnet 221a and the second magnet 221b. The first magnet 221a and the second magnet 221b form a middle magnet. 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 part 22 are the end magnet 221c, the first magnet 221a, the second magnet 221b and the end magnet 221c in the first direction. The second magnetic circuit system 3 includes two magnets, namely the third magnet 31 and the fourth magnet 32. The third magnet 31 and the fourth magnet 32 are arranged on the side of the driving coil 522 facing away from the center magnetic part 22. The third magnet 31 and the fourth magnet 32 are magnetized in the second direction and in opposite directions. The third magnet 31 is opposite to the first magnet 221a in the second direction and has the same magnetization direction. The fourth magnet 32 is opposite to the second magnet 221b in the second direction and has opposite magnetization directions.

Taking the magnetization of the side magnet 231 from top to bottom as an example, as shown in FIG2 , 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 from top to bottom, and the fourth magnet 32 is magnetized from bottom to top. Alternatively, taking the magnetization of the side magnet 231 from bottom to top as an example, 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 from bottom to top, and the fourth magnet 32 is magnetized from top to bottom.

As shown in Figures 5 to 8, according to some embodiments of the present invention, the second magnetic circuit system 3 also includes a fifth magnet 33 arranged between the third magnet 31 and the fourth magnet 32 and extending along the first direction. 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, thereby further enhancing the magnetic field strength acting on the drive coil 522, thereby enhancing the vibration sense of the second vibration system 5.

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

Taking the magnetization of the side magnet 231 from top to bottom as an example, as shown in FIG5 , along the first direction, the magnetization directions of the four first sub-center magnets 221 are from bottom to top, from top to bottom, from bottom to top and from bottom to top, the third magnet 31 is magnetized from top to bottom, the fifth magnet 33 is magnetized from left to right, and the fourth magnet 32 is magnetized from bottom to top. Alternatively, taking the magnetization of the side magnet 231 from bottom to top as an example, along the first direction, the magnetization directions of the four first sub-center magnets 221 are from top to bottom, from bottom to top, from top to bottom and from top to bottom, the third magnet 31 is magnetized from bottom to top, the fifth magnet 33 is magnetized from right to left, and the fourth magnet 32 is magnetized from top to bottom.

Therefore, through 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, and the third magnet 31, the fifth magnet 33 and the fourth magnet 32 form a Halbach array with the magnetic field strengthening side located on the side of the second magnetic circuit system 3 facing the drive coil 522, thereby further enhancing the magnetic field strength acting on the drive coil 522 and enhancing the vibration sense of the second vibration system 5.

As shown in FIGS. 1-2 and 5-6, according to some embodiments of the present invention, the first magnetic circuit system 2 further includes a magnetic yoke 21, the magnetic yoke 21 includes a main body 211 and a hollow hole 21a provided in the main body 211, the central magnetic part 22 and the side magnetic part 23 are provided in the main body 211, and along the second direction, the hollow hole 21a is at least partially arranged opposite to the driving coil 522. Thus, through the above arrangement, 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 generated by the first magnetic circuit system 2, thereby ensuring the vibration effect of the second vibration system 5.

In some embodiments of the present invention, the edge magnetic portion 23 and the first sub-center magnet 221 at both ends are both disposed on the main body 211, so that the first sub-center magnet 221 at the middle position can be opposite to the driving coil 522 through the hollow hole 21a. Alternatively, in other embodiments of the present invention, the center magnetic portion 22 also includes second sub-center magnets 222 disposed at both ends of the third direction of the plurality of first sub-center magnets 221, the third direction is perpendicular to the first direction and the second direction, respectively, and the edge magnetic portion 23 and the second sub-center magnet 222 are disposed on the main body 211. Thus, the plurality of first sub-center magnets 221 can be opposite to the driving coil 522 through the hollow hole 21a.

Optionally, along the first direction, the two ends of the second sub-center magnet 222 are flush with the two ends of the multiple 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 end can form a uniform magnetic field that cooperates with the side magnets 231, which 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 multiple first sub-center magnets 221, which can also make the overall structure of the first magnetic circuit system 2 more compact and regular, and convenient for assembly.

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 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 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 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 .

As shown in Figures 1 and 5, according to some embodiments of the present invention, the vibrator assembly 52 also includes a counterweight block 521, and the two ends of the elastic connecting member 51 are respectively connected to the counterweight block 521 and the shell 1, and the driving coil 522 is arranged on the counterweight block 521. The counterweight block 521 is provided with a through hole 521b. Along the second direction, at least part of the driving coil 522 is opposite to the second magnetic circuit system 3 through the through hole 521b. Therefore, through the above-mentioned arrangement, the through hole 521b can be opposite to part of the driving coil 522, or it can be opposite to the entire driving coil 522, thereby ensuring that the driving coil 522 can smoothly cut the magnetic flux lines generated by the second magnetic circuit system 3, thereby ensuring the vibration effect of the second vibration system 5.

In a specific example of the present invention, a mounting groove 521a is provided on the 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. A through hole 521b is provided on the side of the counterweight 521 close to the second magnetic circuit system 3, and the through hole 521b is connected to the mounting groove 521a, and part of the drive coil 522 is opposite to the second magnetic circuit system 3 through the through hole 521b.

As shown in Figures 1 and 5, according to some embodiments of the present invention, 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 of the first magnetic circuit system 2 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.

In some embodiments of the present invention, 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. 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.

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.

In some embodiments of the present invention, the second magnetic circuit system 3 can be fixed to the main body 11. Optionally, the second magnetic circuit system 3 can be fixed to the main body 11 by adhesive connection or welding connection.

The electronic device according to the second embodiment of the present invention comprises the vibration sound-generating device 100 according to the above embodiment of the present invention. Optionally, the electronic device can be a mobile phone, a PAD, a notebook computer, etc.

According to the electronic device of the second embodiment of the present invention, by setting the above-mentioned vibration sound-generating device 100, the vibration sound-generating device 100 has good sound effect and vibration effect, so that the electronic device has both good sound quality and vibration feedback effect, thereby improving the product market competitiveness of the electronic device.

In the description of the present invention, it should be understood 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 positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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.

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 present invention. 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 may be combined in any one or more embodiments or examples in a suitable manner.

Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art 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 (11)

1. A vibration sound-generating device, comprising: A housing, wherein the housing is made of metal material or a composite of metal material and plastic material, and an installation space is defined in the housing; A first magnetic circuit system, the first magnetic circuit system is connected to the housing, 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 spaced from the central magnetic part to define a magnetic gap, the central magnetic part comprises a plurality of first sub-central magnets spaced along a first direction and magnetized along a second direction, 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 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, the vibrator assembly comprises a driving coil, the driving coil comprises 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, the second magnetic circuit system is arranged on the side of the driving coil facing away from the first magnetic circuit system, wherein the plurality of the first sub-center magnets include a first magnet and a second magnet that are adjacent and have opposite magnetization directions, 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 two 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 two opposite sides of another of the connecting edges. 2. The vibration sound-generating device according to claim 1 is 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 the magnetization direction is the same 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 is characterized in that, 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 is 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 is characterized in that the first magnetic circuit system also includes a magnetic yoke, the magnetic yoke includes a main body and a hollow hole arranged in the main body, the central magnetic part and the side magnetic part are arranged in the main body, and along the second direction, the hollow hole is at least partially arranged opposite to the driving coil. 6. The vibration sound-generating device according to claim 5, characterized in that the side magnet portion and the first sub-center magnet located at both ends are both disposed on the main body portion; Alternatively, the central magnetic portion further includes second sub-center magnets disposed at both ends of a 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 the side 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 is 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 the counterweight block 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. 8. The vibration sound-generating device according to any one of claims 1-7 is 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, 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 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. 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 by comprising the vibration sound-generating device according to any one of claims 1 to 10.