WO2020228050A1 - 屏幕发声激励器及电子设备 - Google Patents

屏幕发声激励器及电子设备 Download PDF

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Publication number
WO2020228050A1
WO2020228050A1 PCT/CN2019/087556 CN2019087556W WO2020228050A1 WO 2020228050 A1 WO2020228050 A1 WO 2020228050A1 CN 2019087556 W CN2019087556 W CN 2019087556W WO 2020228050 A1 WO2020228050 A1 WO 2020228050A1
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WIPO (PCT)
Prior art keywords
screen
magnetic
circuit system
fixedly connected
magnetic circuit
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PCT/CN2019/087556
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English (en)
French (fr)
Inventor
严绪东
金云浩
张鹏飞
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AAC Microtech Changzhou Co Ltd
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AAC Microtech Changzhou Co Ltd
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Publication of WO2020228050A1 publication Critical patent/WO2020228050A1/zh
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2400/00—Loudspeakers
    • H04R2400/11—Aspects regarding the frame of loudspeaker transducers

Definitions

  • the present invention relates to the technical field of acoustics, in particular to a screen sounding exciter and electronic equipment.
  • the principle is to use an actuator to drive the front screen and structure.
  • the screen is used as a vibrating body to generate sound waves through vibration and then transmit them to the human ear.
  • Piezoelectric ceramic unit exciters Multi-layer piezoelectric ceramics are attached to a thin metal sheet, called a vibrating membrane. Alternating voltages are applied to the vibrating membrane, which will vary with the voltage. The constantly changing upward and downward bending drives the load structure to vibrate and produce sound; and the micro-vibration unit exciter, which uses the interaction of the electric field and the magnetic field to generate a force field.
  • the magnetic circuit system and vibration system of the micro-vibration unit exciter currently used in the industry are split structures, and the magnetic circuit system and the vibration system are respectively fixed to the middle frame of the electronic device, so that the split magnetic circuit system and the vibration system are in the assembly process ,
  • the accuracy is difficult to guarantee, the installed performance is difficult to guarantee, and the device integrity is poor.
  • the purpose of the present invention is to provide a screen sounding exciter and electronic equipment, which can assemble a magnetic circuit system and a vibration system into an integral exciter, so as to improve assembly accuracy and overall machine performance.
  • a screen sound exciter including a magnetic circuit system and a vibration system for driving the screen to vibrate and sound
  • the magnetic circuit system includes a lower base plate and a magnetic steel structure fixed on the lower base plate, the The magnetic steel structure is enclosed to form an accommodating space
  • the vibration system includes a voice coil inserted in the accommodating space and an upper cover plate fixedly connected to the voice coil
  • the screen sound exciter also includes a magnetic The middle frame fixing part fixedly installed by the circuit system and the elastic part fixedly connected to the magnetic circuit system at one end and fixedly connected to the vibration system at the other end.
  • the elastic member includes an upper connecting portion fixedly connected to the vibration system, a lower connecting portion fixedly connected to the magnetic circuit system, and a spring interposed between the upper connecting portion and the lower connecting portion body.
  • the spring body is a U-shaped leaf spring or a coil spring.
  • the magnetic circuit system further includes a fixed block clamped between the magnetic steel structure and the lower bottom plate.
  • the magnetic steel structure includes four magnetic steels surrounding the outer surface of the voice coil, and the elastic members are arranged between adjacent magnetic steels.
  • the magnetic circuit system further includes a pole core fixed on the surface of the magnetic steel structure facing the accommodating space, and one pole core is attached to the surface of each magnetic steel.
  • the vibration system further includes an iron core inserted in the hollow position of the voice coil.
  • the vibration system further includes magnetic conductive plates respectively fixed at the upper and lower ends of the voice coil, one magnetic conductive plate is fixedly connected with the upper cover plate, and the other magnetic conductive plate is opposed to the lower bottom plate at intervals.
  • the middle frame fixing member includes a bottom plate fixing part fixedly connected to the lower bottom plate and the magnetic circuit system, and a middle frame fixing part extending in the horizontal direction of the middle frame, and the middle frame fixing part is provided with Through holes for assembly.
  • An electronic device of the present invention includes a display screen, a middle frame for fixing the display screen, and a lower housing fixedly connected to the middle frame.
  • the electronic device also includes a display screen, a middle frame fixedly connected to the middle frame, and a lower housing. At least one of the above-mentioned screen sounding exciters.
  • the magnetic circuit system of the present invention is fixedly connected to the middle frame of the electronic device through the middle frame fixing member, the vibration system is fixedly connected to the electronic device display screen, and the upper cover plate and the magnetic steel structure have a first Vibration gap, there is a second vibration gap between the end of the voice coil away from the upper cover and the lower bottom plate, and the vibration system is in the first vibration gap and the second vibration gap under the action of the magnetic circuit system Vibrate, and drive the display to vibrate and sound.
  • the elastic part is arranged between the vibration system and the magnetic circuit system to achieve an elastic and fixed connection between the two, which can facilitate the assembly process, and at the same time limit the relative positional relationship between the vibration system and the magnetic circuit system to achieve the complete machine Precision requirements.
  • FIG. 1 is a schematic diagram of a three-dimensional exploded structure of an electronic device in an embodiment of the present invention
  • FIG. 2 is a schematic diagram of the structure of the screen sound exciter in the embodiment of the present invention.
  • FIG. 3 is a schematic diagram of an exploded structure of a screen sounder in an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of an exploded structure of the vibration system of the screen sounder in the embodiment of the present invention.
  • FIG. 5 is a schematic diagram of the magnetic circuit system structure of the screen sounder in the embodiment of the present invention.
  • Figure 6 is a cross-sectional view of the screen sound actuator in the embodiment of the present invention along the direction A-A in Figure 2;
  • Figure 7 is a schematic diagram of the structure of an elastic member in an embodiment of the present invention.
  • Fig. 8 is a schematic structural diagram of a middle frame fixing member in an embodiment of the present invention.
  • the present invention discloses an electronic device, including a display screen 200, a middle frame 300 that fixes the display screen 200, a lower housing 400 fixedly connected to the middle frame 300, and a At least one screen sounding actuator 100 with which the display screen 200 is in contact.
  • the middle frame 300 is provided with a plurality of grooves for accommodating the screen sound actuator 100, and each group of grooves accommodates a group of the screen sound actuator 100.
  • the screen sound actuator 100 of the present invention includes a magnetic circuit system 110 and a vibration system 120 that drives the screen to vibrate and produce sound.
  • the magnetic circuit system 110 includes a lower base plate 111 and a magnet fixed on the lower base plate 111 Structure 112, the magnetic steel structure 112 is surrounded to form a accommodating space 115.
  • the vibration system 120 includes a voice coil 121 inserted in the accommodating space 115 and an upper cover 122 fixedly connected to the voice coil 121.
  • the screen sound exciter 100 also It includes a middle frame fixing member 140 fixedly installed with the magnetic circuit system 110 and an elastic member 130 fixedly connected to the magnetic circuit system 110 at one end and fixedly connected to the vibration system 120 at the other end.
  • the upper cover 122 and the magnetic steel structure 112 have a first There is a vibration gap 125, and a second vibration gap 126 is formed between the end of the voice coil 121 away from the upper cover 122 and the lower bottom plate 111.
  • the magnetic circuit system 110 of the present invention is fixedly connected to the electronic device middle frame 300 through the middle frame fixing member 140, the vibration system 120 is fixedly connected to the electronic device display screen 200, and the vibration system 120 is in the magnetic circuit system 110. Under the action, it vibrates in the first vibration gap 125 and the second vibration gap 126, and drives the display screen 200 to vibrate and produce sound.
  • the elastic member 130 is arranged between the vibration system 120 and the magnetic circuit system 110 to achieve elasticity between the two
  • the fixed connection not only facilitates the assembly process, but also limits the relative positional relationship between the vibration system 120 and the magnetic circuit system 110, which meets the requirements of the accuracy of the whole machine.
  • the elastic member 130 includes an upper connecting portion 131 fixedly connected to the upper cover 122, and a lower connection fixedly connected to at least one of the lower bottom plate 111, the magnetic steel structure 112, the fixing block 113 or the middle frame fixing member 140 Portion 132 and a spring body 133 disposed between the upper connecting portion 131 and the lower connecting portion 132.
  • the upper connecting portion 131 and the upper cover 122 are seamlessly bonded together by glue, and the lower connecting portion 132 and the lower bottom plate 111 are seamlessly bonded together by glue.
  • the upper connecting portion 131 and the lower connecting portion 132 are mainly bonded together.
  • the spring body 133 can be an arched spring or a spiral spring, as long as it can ensure an elastic fixed connection within a certain range, the upper connecting portion 131 and the lower connecting portion 132 It is welded and fixed with the spring body 133.
  • a first gasket 134 is provided on the opposite surface of the spring body 133 and the fixing surface of the upper connecting portion 131. The first gasket 134 is used to strengthen the connection between the spring body 133 and the upper connecting portion 131.
  • a second gasket 135 is also provided on the opposite surface of the fixed surface of the body 133 and the lower connecting portion 132, and the second gasket 135 is used to strengthen the connection between the spring body 133 and the lower connecting portion 132.
  • the spring body 133 is a U-shaped leaf spring or a coil spring.
  • the spring body 133 mainly elastically connects the magnetic circuit system and the vibration system, and its specific shape can be adjusted according to different needs.
  • the present invention is not limited to the shape limitation of the two spring bodies 133 mentioned above, and can also be of other shapes. As long as the spring structure that can realize elastic connection belongs to the simple deformation and transformation of this solution, it should fall into the protection scope of the present invention. .
  • the number of spring bodies 133 is determined according to the specific shapes of the voice coil 121 and the magnetic steel structure 112.
  • the elastic member 130 in this solution includes four groups, and the four groups of elastic bodies realize the connection between the upper cover 122 and the lower bottom plate 111. Stable and fixed between.
  • the present invention is not limited to the arrangement of the four groups of elastic members 130, the elastic member 130 can also be directly deformed into a ring-shaped elastic member to surround the magnetic steel structure 112 as a whole, or two groups of elastic members 130 can be symmetrically fixed to the magnetic steel structure 112. Structure 112 outside.
  • it can realize the elastic and stable connection of the magnetic circuit system 110 and the vibration system 120, it belongs to the simple deformation and transformation of this solution and should fall into the protection scope of the present invention.
  • the magnetic circuit system 110 further includes a fixing block 113 clamped between the magnetic steel structure 112 and the lower base plate 111.
  • the fixing block 113 is a plastic material, and is used to fix the magnetic steel structure 112 to the lower base plate 111 to avoid the possibility of the magnetic steel structure 112 being displaced or loosened during the use of the electronic device .
  • the magnetic circuit system 110 further includes a pole core 114 fixed on the surface of the magnetic steel structure 112 facing the accommodating space 115.
  • the pole core enhances the magnetic permeability of the magnetic steel structure 112.
  • the magnetic steel structure 112 includes four magnetic steels surrounding the outer surface of the voice coil 121, and elastic members 130 are provided between adjacent magnetic steels.
  • Each piece of magnetic steel corresponds to a set of pole cores 114.
  • a fixed block is provided at the connection between each magnetic steel and the lower base plate 111, and a pole core 114 is provided on the surface of each magnetic steel facing the accommodating space 115 to make the magnetic field stable and uniform.
  • the vibration system 120 further includes an iron core 123 inserted in the hollow position of the voice coil 121.
  • the iron core 123 can enhance the magnetic induction intensity of the voice coil 121 to a certain extent, and improve the vibration effect of the vibration system 120.
  • the vibration system 120 further includes magnetic conductive plates 124 fixed on the upper and lower ends of the voice coil 121, respectively.
  • the magnetic conductive plates 124 can also be further fixedly connected to the iron core 123, one of the magnetic conductive plates 124 and the upper cover 122 In a fixed connection, the other magnetic conductive plate 124 is opposed to the lower bottom plate 111 at intervals.
  • the magnetic permeable plate 124 is mainly used to fix the voice coil 121 in combination with the iron core 123 and play a certain role in magnetic permeability.
  • the permeable plate 124 is also provided with a convenient way for the voice coil 121 input line and output line to be electrically connected to the FPC circuit board 1222 Lead groove.
  • the upper cover 122 includes a supporting plate 1221 fixedly connected to the magnetic conductive plate 124 to transmit vibration force, and an FPC circuit board 1222 fixed on the supporting plate 1221 and electrically connected to the voice coil 121.
  • the FPC circuit board 1222 is electrically connected to the voice coil 121 and inputs current values of different magnitudes to the voice coil 121 to achieve the effect that the voice coil 121 drives the display screen 200 to emit different sounds under different signals.
  • the support plate includes a plastic support plate 1221 and a steel sheet support plate 1223.
  • the double-layer support plate can not only meet the support rigidity requirements of the support plate, but also can play a protective role to a certain extent.
  • the middle frame fixing member 140 includes a bottom plate fixing portion 141 fixedly connected to the lower bottom plate 111 and the magnetic circuit system 110, and a middle frame fixing portion 142 extending horizontally to the middle frame 300.
  • the middle frame fixing portion 142 is provided with There are through holes for assembly.
  • the middle frame fixing member 140 includes two groups to fix the lower bottom plate 111. Its shape is not limited. As long as the structure of the middle frame 300 and the lower bottom plate 111 can be fixedly connected, it belongs to a simple modification and transformation of this scheme and should fall into The scope of protection of the present invention.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

本发明提供了一种屏幕发声激励器以及应用该屏幕发声激励器的电子设备，电子设备包括屏幕发声激励器，屏幕发声激励器包括磁路系统以及驱动屏幕振动发声的振动系统，所述磁路系统包括下底板以及固定于所述下底板上的磁钢结构，所述磁钢结构围设形成容置空间，所述振动系统包括插置于所述容置空间的音圈以及与所述音圈固定连接的上盖板，该屏幕发声激励器还包括与所述磁路系统固定安装的中框固定件以及一端与所述磁路系统固定连接且另一端与所述振动系统固定连接的弹性件。本发明的可以将磁路系统以及振动系统组装为整体式激励器，以提高装配精度以及整机性能。

Description

屏幕发声激励器及电子设备 技术领域
本发明涉及声学技术领域，尤其涉及一种屏幕发声激励器，及电子设备。
 背景技术
随着手机全面屏的普及，原有的16：9的屏幕逐步被18：9替代，各厂商争相扩大手机的屏占比，部分手机已然将屏占比达到了90％以上，但是传统器件的摆放日渐困难，尤其是传统受话器的位置，逐步被隐藏甚至取消；目前传统的听筒还是以动圈式Receiver为主，屏幕听筒位置开孔的问题直到屏幕发声技术的出现才得以解决，其原理就是通过一个激励器(actuator)，驱动前方的屏幕及结构，以屏幕作为振动体，借由振动产生声波，然后传送到人耳。
目前手机上的屏幕发声激励器主要有两种，压电陶瓷单元激励器，多层压电陶瓷片附着在金属薄片，称作振动膜，给振动膜加交替变化的电压，会随着电压的变化而不停的上下弯曲驱动负载结构振动发声；以及微振动单元激励器，利用电场跟磁场交互作用而产生力场。
当前行业采用的微振动单元激励器的磁路系统与振动系统为分体式结构，磁路系统与振动系统分别与电子设备的中框固定，这样分体式的磁路系统与振动系统在装配过程中，精度难以保证，装机性能难以保证，器件整体性较差。
因此，有必要提供一种磁路系统与振动系统为整体式的激励器，以保证器件的装配精度以及装机性能。
 技术问题
本发明的目的在于提供一种屏幕发声激励器及电子设备，能够将磁路系统以及振动系统组装为整体式激励器，以提高装配精度以及整机性能。
 技术解决方案
本发明的技术方案如下：一种屏幕发声激励器，包括磁路系统以及驱动屏幕振动发声的振动系统，所述磁路系统包括下底板以及固定于所述下底板上的磁钢结构，所述磁钢结构围设形成容置空间，所述振动系统包括插置于所述容置空间的音圈以及与所述音圈固定连接的上盖板，该屏幕发声激励器还包括与所述磁路系统固定安装的中框固定件以及一端与所述磁路系统固定连接且另一端与所述振动系统固定连接的弹性件，所述上盖板与所述磁钢结构之间具有第一振动间隙，所述音圈的远离所述上盖板的一端与所述下底板之间具有第二振动间隙。
进一步地，所述弹性件包括与所述振动系统固定连接的上连接部、与所述磁路系统固定连接的下连接部以及置于所述上连接部与所述下连接部之间的弹簧体。
进一步地，所述弹簧体为U型簧片或螺旋弹簧。
进一步地，所述磁路系统还包括夹持在所述磁钢结构与所述下底板之间的固定块。
进一步地，所述磁钢结构包括围设在所述音圈外表面的四块磁钢，相邻的磁钢之间均设有所述弹性件。
进一步地，所述磁路系统还包括固定于所述磁钢结构面向所述容置空间的表面的极芯，每块所述磁钢的表面均贴设有一个所述极芯。
进一步地，所述振动系统还包括插置于所述音圈中空位置的铁芯。
进一步地，所述振动系统还包括分别固定在所述音圈上下两端的导磁板，一导磁板与所述上盖板固定连接，另一导磁板与所述下底板间隔相对。
进一步地，所述中框固定件包括与所述下底板及所述磁路系统固定连接的底板固定部以及向中框水平方向延伸的中框固定部，所述中框固定部上设有用于装配的通孔。
本发明一种电子设备，包括显示屏、固定显示屏的中框以及与所述中框固定连接的下壳体，该电子设备还包括设置于所述中框内并与所述显示屏相接触的至少一个上述屏幕发声激励器。
 有益效果
本发明的有益效果在于：本发明的磁路系统通过中框固定件与电子设备中框固定连接，振动系统与电子设备显示屏固定连接，上盖板与所述磁钢结构之间具有第一振动间隙，所述音圈的远离所述上盖板的一端与所述下底板之间具有第二振动间隙，振动系统在磁路系统的作用下，在第一振动间隙以及第二振动间隙内振动，并带动显示屏振动发声。弹性件设置在振动系统与磁路系统之间，实现二者之间的有弹性固定连接，既可以方便装配过程，同时将振动系统与磁路系统的相对位置关系进行了限定，达到了整机精度的要求。
 附图说明
图1为本发明实施例中电子设备的立体分解结构示意图；
图2为本发明实施例中屏幕发声激励器的结构示意图；
图3为本发明实施例中屏幕发声器的分解结构示意图；
图4为本发明实施例中屏幕发声器的振动系统分解结构示意图；
图5为本发明实施例中屏幕发声器的磁路系统结构示意图；
图6为本发明实施例中屏幕发声激励器沿图2中A-A方向的剖视图；
图7为本发明实施例中弹性件的结构示意图；
图8为本发明实施例中中框固定件的结构示意图。
 本发明的实施方式
下面结合附图和实施方式对本发明作进一步说明。
请参阅图1-2，本发明公开了一种电子设备，包括显示屏200、固定显示屏200的中框300、与中框300固定连接的下壳体400以及设置于中框300内并与显示屏200相接触的至少一个屏幕发声激励器100。中框300内设有多处容置屏幕发声激励器100的凹槽，每组凹槽中容置一组屏幕发声激励器100。
请进一步参阅图3-5，本发明的屏幕发声激励器100，包括磁路系统110以及驱动屏幕振动发声的振动系统120，磁路系统110包括下底板111以及固定于下底板111上的磁钢结构112，磁钢结构112围设形成容置空间115，振动系统120包括插置于容置空间115的音圈121以及与音圈121固定连接的上盖板122，该屏幕发声激励器100还包括与磁路系统110固定安装的中框固定件140以及一端与磁路系统110固定连接且另一端与振动系统120固定连接的弹性件130，上盖板122与磁钢结构112之间具有第一振动间隙125，音圈121的远离上盖板122的一端与下底板111之间具有第二振动间隙126。
相较于现有技术，本发明的磁路系统110通过中框固定件140与电子设备中框300固定连接，振动系统120与电子设备显示屏200固定连接，振动系统120在磁路系统110的作用下，在第一振动间隙125以及第二振动间隙126内振动，并带动显示屏200振动发声，弹性件130设置在振动系统120与磁路系统110之间，实现二者之间的有弹性固定连接，既可以方便装配过程，同时将振动系统120与磁路系统110的相对位置关系进行了限定，达到了整机精度的要求。
请进一步参阅图6，弹性件130包括与上盖板122固定连接的上连接部131，与下底板111、磁钢结构112、固定块113或中框固定件140中至少一个固定连接的下连接部132以及置于上连接部131与下连接部132之间的弹簧体133。上连接部131与上盖板122之间通过胶水无缝粘接在一起，下连接部132与下底板111之间通过胶水无缝粘接在一起，上连接部131与下连接部132主要起到连接上盖板122与下底板111的作用，弹簧体133可以是拱形弹片或是螺旋状弹簧，只要是能够在一定范围内保证弹性固定连接即可，上连接部131、下连接部132与弹簧体133焊接固定，弹簧体133与上连接部131的固定表面的相对表面上设有第一垫片134，第一垫片134用于加固弹簧体133与上连接部131的连接，弹簧体133与下连接部132的固定表面的相对表面上也设有第二垫片135，第二垫片135用于加固弹簧体133与下连接部132的连接。
在本实施例中，弹簧体133为U型簧片或螺旋弹簧。弹簧体133主要将磁路系统与振动系统弹性连接，其具体形状可以根据不同的需求进行调整。当然，本发明并不局限于上述两种弹簧体133的形状限制，也可以是其他形状，只要能够实现弹性连接的弹簧结构均属于本方案的简单变形与变换，应当落入本发明的保护范围。
弹簧体133的数量根据音圈121以及磁钢结构112的具体形状确定，如图1所示，本方案中的弹性件130包括四组，四组弹性体实现上盖板122与下底板111之间的稳定固定。当然，本发明并不局限于上述四组弹性件130的设置，弹性件130也可以直接变形为环形弹性件整体环绕在磁钢结构112外，也可以使用两组弹性件130对称固定在磁钢结构112外。只要是能够实现磁路系统110与振动系统120的有弹性稳定连接方式，均属于本方案的简单变形与变换，应当落入本发明的保护范围。
在本实施例中，磁路系统110还包括夹持在磁钢结构112与下底板111之间的固定块113。固定块113为塑胶材料，用于将磁钢结构112固定于下底板111，避免磁钢结构112在电子设备使用过程中移位或松脱的可能 。
在本实施例中，磁路系统110还包括固定于磁钢结构112面向容置空间115的表面的极芯114。极芯增强了磁钢结构112的导磁作用。
在本实施例中，磁钢结构112包括围设在音圈121外表面的四块磁钢，相邻的磁钢之间均设有弹性件130。
每块磁钢对应一组极芯114。每块磁钢与下底板111之间的连接处均设有一块固定块，每块磁钢面向容置空间115的表面均设有一块极芯114，使磁场产生稳定且均匀。
在本实施例中，振动系统120还包括插置于音圈121中空位置的铁芯123。铁芯123可以在一定程度上增强音圈121的磁感应强度，提高振动系统120的振动效果。
在本实施例中，振动系统120还包括分别固定在音圈121上下两端的导磁板124，导磁板124也可进一步与铁芯123固定连接，其中一导磁板124与上盖板122固定连接，另一导磁板124与下底板111间隔相对。
导磁板124主要用于与铁芯123组合固定音圈121，并起到一定导磁作用，导磁板124上还设有便于音圈121输入线以及输出线与FPC线路板1222电连接的引线槽。
在本实施例中，上盖板122包括与导磁板124固定连接以传递振动作用力的支撑板1221以及固定于支撑板1221上并与音圈121电连接的FPC线路板1222。FPC线路板1222与音圈121电连接，并向音圈121输入大小不同的电流值，以实现音圈121在不同信号下带动显示屏200发出不同声音的效果。支撑板包括塑胶支撑板1221以及钢片支撑板1223，双层支撑板既可以满足支撑板的支撑刚性要求，又可以在一定程度上起到保护作用。
请进一步参阅图7，中框固定件140包括与下底板111以及磁路系统110固定连接的底板固定部141以及向中框300水平方向延伸的中框固定部142，中框固定部142上设有装配的通孔。中框固定件140包括两组，将下底板111进行固定，其形状并不受局限，只要能够实现中框300与下底板111固定连接的结构均属于本方案的简单变形与变换，应当落入本发明的保护范围。
以上的仅是本发明的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本发明创造构思的前提下，还可以做出改进，但这些均属于本发明的保护范围。

Claims (10)

  1. 一种屏幕发声激励器，包括磁路系统以及驱动屏幕振动发声的振动系统，所述磁路系统包括下底板以及固定于所述下底板上的磁钢结构，所述磁钢结构围设形成容置空间，所述振动系统包括插置于所述容置空间的音圈以及与所述音圈固定连接的上盖板，其特征在于，该屏幕发声激励器还包括与所述磁路系统固定安装的中框固定件以及一端与所述磁路系统固定连接且另一端与所述振动系统固定连接的弹性件，所述上盖板与所述磁钢结构之间具有第一振动间隙，所述音圈的远离所述上盖板的一端与所述下底板之间具有第二振动间隙。
  2. 根据权利要求1所述的屏幕发声激励器，其特征在于，所述弹性件包括与所述振动系统固定连接的上连接部、与所述磁路系统固定连接的下连接部以及置于所述上连接部与所述下连接部之间的弹簧体。
  3. 根据权利要求2所述的屏幕发声激励器，其特征在于，所述弹簧体为U型簧片或螺旋弹簧。
  4. 根据权利要求1所述的屏幕发声激励器，其特征在于，所述磁路系统还包括夹持在所述磁钢结构与所述下底板之间的固定块。
  5. 根据权利要求1所述的屏幕发声激励器，其特征在于，所述磁钢结构包括围设在所述音圈外表面的四块磁钢，相邻的磁钢之间均设有所述弹性件。
  6. 根据权利要求5所述的屏幕发声激励器，其特征在于，所述磁路系统还包括固定于所述磁钢结构面向所述容置空间的表面的极芯，每块所述磁钢的表面均贴设有一个所述极芯。
  7. 根据权利要求1所述的屏幕发声激励器，其特征在于，所述振动系统还包括插置于所述音圈中空位置的铁芯。
  8. 根据权利要求7所述的屏幕发声激励器，其特征在于，所述振动系统还包括分别固定在所述音圈上下两端的导磁板，一导磁板与所述上盖板固定连接，另一导磁板与所述下底板间隔相对。
  9. 根据权利要求1所述的屏幕发声激励器，其特征在于，所述中框固定件包括与所述下底板及所述磁路系统固定连接的底板固定部以及向中框水平方向延伸的中框固定部，所述中框固定部上设有用于装配的通孔。
  10. 一种电子设备，包括显示屏、固定显示屏的中框以及与所述中框固定连接的下壳体，其特征在于，该电子设备还包括设置于所述中框内并与所述显示屏相接触的至少一个如权利要求1-9任一项所述的屏幕发声激励器。
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