WO2021082034A1 - 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
WO2021082034A1
WO2021082034A1 PCT/CN2019/115573 CN2019115573W WO2021082034A1 WO 2021082034 A1 WO2021082034 A1 WO 2021082034A1 CN 2019115573 W CN2019115573 W CN 2019115573W WO 2021082034 A1 WO2021082034 A1 WO 2021082034A1
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WO
WIPO (PCT)
Prior art keywords
screen
magnetic circuit
magnet
circuit system
display screen
Prior art date
Application number
PCT/CN2019/115573
Other languages
English (en)
French (fr)
Inventor
葛欢
毛路斌
Original Assignee
瑞声声学科技(深圳)有限公司
瑞声科技(新加坡)有限公司
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Application filed by 瑞声声学科技(深圳)有限公司, 瑞声科技(新加坡)有限公司 filed Critical 瑞声声学科技(深圳)有限公司
Publication of WO2021082034A1 publication Critical patent/WO2021082034A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R11/00—Transducers of moving-armature or moving-core type
    • H04R11/02—Loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; 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; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2869—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R15/00—Magnetostrictive transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026—Details of the structure or mounting of specific components
    • H04M1/0266—Details of the structure or mounting of specific components for a display module assembly
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H04R1/028—Casings; Cabinets ; Supports therefor; Mountings therein associated with devices performing functions other than acoustics, e.g. electric candles
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2400/00—Loudspeakers
    • H04R2400/07—Suspension between moving magnetic core and housing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2400/00—Loudspeakers
    • H04R2400/11—Aspects regarding the frame of loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/045—Mounting

Definitions

  • the present invention relates to the technical field of acoustics, in particular to a screen sounding exciter and electronic equipment.
  • 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 object of the present invention is to provide a screen sound exciter and electronic device that can enhance or eliminate the vibration effect of the back cover.
  • the first magnetic circuit system includes a screen connection plate fixed on one side of the display screen and a first magnetic steel fixed on the other side of the screen connection plate.
  • the second magnetic circuit system includes a mass block connected to the support frame through an elastic member, and a second magnetic steel fixed in a hollow position of the mass block.
  • the electromagnetic drive system includes a support frame fixed on the back cover, a voice coil fixed on the support frame, and an iron core inserted in the hollow position of the voice coil, and the first vibration gap is formed in Between the first magnetic steel and the iron core, the second vibration gap is formed between the second magnetic steel and the iron core.
  • the elastic member includes a first connecting part fixedly connected to the support frame, a second connecting part fixedly connected to the mass, and one end connected to the first connecting part and the other end connected to the first connecting part.
  • the spring body connected by the two connecting parts.
  • the support frame includes a first frame body for fixing the voice coil and a second frame body fixed on the back cover, and the first connecting portion is clamped between the first frame body and the second frame body between.
  • first connecting portion is a first ring-shaped connecting piece that fits with the outer edge of the first frame body and the outer edge of the second frame body, and the second connecting portion is connected to the mass block.
  • first magnet and the second magnet are both permanent magnets, and the polar arrangement directions of the first magnet and the second magnet are the same.
  • first magnet and the second magnet are both permanent magnets, and the polarities of the first magnet and the second magnet are arranged in opposite directions.
  • An electronic device of the present invention includes a display screen, a middle frame for fixing the display screen, a back cover fixedly connected to the middle frame, and a battery housed in the middle frame, wherein the electronic device also includes a set At least one of the above-mentioned screen sounding actuators is connected to the display screen on the back cover.
  • the beneficial effect of the present invention is that the screen sound exciter of the present invention forms a first vibration gap and a second vibration gap with the electromagnetic drive system by dividing the magnetic circuit system into a first magnetic circuit system and a second magnetic circuit system.
  • the magnetic circuit system is connected to the display screen, which can drive the display screen to sound under the influence of the electromagnetic field of the electromagnetic drive system.
  • the electromagnetic drive system is connected to the back cover.
  • the first magnetic circuit system and the second magnetic circuit system can interact to cancel or enhance the electromagnetic drive.
  • the vibration effect of the system, so that the vibration effect of the back cover is enhanced or eliminated.
  • FIG. 1 is a schematic diagram of a three-dimensional structure of an electronic device in an embodiment of the present invention
  • FIG. 2 is a cross-sectional view of the electronic device along the direction A-A in FIG. 1 in the embodiment of the present invention
  • FIG. 3 is a schematic diagram of the structure of the screen sound exciter in the embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a three-dimensional exploded structure of the screen sounding exciter in the embodiment of the present invention.
  • Fig. 5 is a cross-sectional view of the screen sounding actuator in the embodiment of the present invention along the direction B-B in Fig. 3;
  • Fig. 6 is a schematic diagram of the structure of an elastic member in an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of the first magnetic polarity relationship of the screen sound exciter in the embodiment of the present invention.
  • FIG. 8 is a schematic diagram of the second magnetic polarity relationship of the screen sound exciter in the embodiment of the present invention.
  • Figure 9 is a schematic diagram of the third magnetic polarity relationship of the screen sound exciter in the embodiment of the present invention
  • FIG. 10 is a schematic diagram of the fourth magnetic polarity relationship of the screen sounding actuator in the embodiment of the present invention.
  • the present invention discloses an electronic device, including a display screen 200, a middle frame 400 for fixing the display screen 200, a back cover 300 fixedly connected to the middle frame 400, and a battery accommodated in the middle frame 400 500, and at least one screen sounding exciter 100 which is arranged on the back cover 300 and fixedly connected to the display screen 200.
  • the middle frame 400 is provided with a plurality of through holes 410 that are convenient for the screen sound exciter 100 to pass through and fixed on the back cover 300.
  • a screen sound exciter 100 which includes a first magnetic circuit system 110, an electromagnetic drive system 130, and a second magnetic circuit system 120 that are sequentially arranged from top to bottom along the vibration direction of the display screen 200.
  • the first magnetic circuit system 110 is fixed to the display screen 200
  • the electromagnetic drive system 130 is fixed to the back cover 300.
  • the screen sound actuator 100 also includes one end connected to the second magnetic circuit system 120 to elastically support the second magnetic circuit system 120 and the other end
  • the elastic member 140 fixed to the electromagnetic drive system 130.
  • the screen sound actuator 100 of the present invention divides the magnetic circuit system into a first magnetic circuit system 110 and a second magnetic circuit system 120 to form a first vibration gap 113 and a second vibration gap 113 and a second magnetic circuit system 130, respectively, with the electromagnetic drive system 130.
  • Vibration gap 123 the first magnetic circuit system 110 is connected to the display screen 200, which can drive the display screen 200 to produce sound under the influence of the electromagnetic field of the electromagnetic drive system 130.
  • the electromagnetic drive system 130 is connected to the back cover 300, and the first magnetic circuit system 110 is connected to the
  • the second magnetic circuit system 120 can interact to cancel or enhance the vibration effect of the electromagnetic drive system 130, thereby enhancing or eliminating the vibration effect of the rear cover 300.
  • the first magnetic circuit system 110 includes a screen connection plate 112 fixed on one side of the display screen 200 and a first magnetic steel 111 fixed on the other side of the screen connection plate 112.
  • One side of the screen connection plate 112 is in contact with the inner surface of the display screen 200, and the other side of the screen connection plate 112 is fixed to the first magnet 111.
  • the The vibration gap 113 drives the display screen 200 to vibrate and produce sound.
  • the second magnetic circuit system 120 includes a mass 122 connected to the support frame 133 through an elastic member 140 and a second magnetic steel 121 fixed in the hollow position of the mass 122.
  • the mass 122 is used to fix the second magnetic steel 121 and has a certain weight to provide a certain reaction force to the electromagnetic drive system 130.
  • the electromagnetic drive system 130 includes a support frame 133 fixed on the back cover 300, a voice coil 131 fixed on the support frame 133, and an iron core 132 inserted in the hollow position of the voice coil 131.
  • a first vibration gap 113 is formed between the first magnetic steel 111 and the iron core 132
  • the second vibration gap 123 is formed between the second magnetic steel 121 and the iron core 132.
  • the voice coil 131 is electrically connected to the control main board in the electronic device. After the current flows in the voice coil 131, an electromagnetic field centered on the iron core 132 is formed.
  • the iron core 132 is opposite to the first magnet 111 and the second magnet 121. Two opposite poles are generated at the ends, and due to the action of the electromagnetic field, the first magnet 111 and the second magnet 121 respectively generate vibration effects.
  • the elastic member 140 includes a first connecting portion 141 fixedly connected to the support frame 133, a second connecting portion 142 fixedly connected to the mass 122, and one end connected to the first connecting portion 141 and the other end to the second The spring body 143 connected by the connecting portion 142.
  • the support frame 133 includes a first frame body 1331 for fixing the voice coil 131 and a second frame body 1332 that is fixed on the rear cover 300.
  • the first connecting portion 141 is clamped between the first frame body 1331 and the second frame body 1331. Between the frame 1332.
  • the first frame body 1331 and the second frame body 1332 are fixedly connected, and the fixing of the first connecting portion 141 is realized.
  • the first connecting portion 141 is a first ring-shaped connecting piece that fits the outer edge of the first frame body 1331 and the outer edge of the second frame body 1332, and the two sides of the first ring-shaped connecting piece are respectively Through glue, the edge position of the first frame body 1331 and the edge position of the second frame body 1332 are seamlessly bonded.
  • the second connecting portion 142 is a second ring-shaped connecting piece that fits with the outer edge of the mass 122. One side of the two ring-shaped connecting pieces is seamlessly bonded to the edge position of the mass 122 by glue, and the second ring-shaped connecting piece is fixed in the hollow groove of the first ring-shaped connecting piece through a spring body 143.
  • the outer diameter of the first ring-shaped connecting piece is larger than that of the second ring-shaped connecting piece.
  • the spring body 143 bends, so that the first ring-shaped connecting piece and the second ring-shaped connecting piece are at different height positions. vibration.
  • the spring body 143 is a straight or curved elastic piece structure with ductility, and the number of the spring body 143 is determined according to the specific shapes of the first loop-shaped connecting piece and the second loop-shaped connecting piece.
  • the first magnet 111 and the second magnet 121 are both permanent magnets, and the polar arrangement directions of the first magnet 111 and the second magnet 121 are the same.
  • the N poles of the first magnet 111 and the second magnet 121 are all facing upwards, and the S poles are all facing downwards; when the coil current makes the S poles of the iron core 132 in the electromagnetic drive system 130 face upwards, the iron
  • the first magnetic steel 111 and the iron core 132 and the second magnetic steel 121 and the iron core 132 all present a mutual repulsive force, two repulsive force directions On the contrary, they can cancel each other out, weaken the vibration of the electromagnetic drive system 130, and thereby reduce the vibration effect of the rear cover 300.
  • the first magnet 111 and the second magnet 121 are both permanent magnets, and the polarities of the first magnet 111 and the second magnet 121 are arranged in opposite directions.
  • the N pole of the first magnet 111 faces up
  • the S pole of the second magnet 121 faces up
  • both the first magnet 111 and the iron core 132 present a mutual repulsive force
  • the second magnet 121 and the iron core 132 At this time, the repulsive force received by the iron core 132 is in the same direction as the attractive force, and the two forces can be superimposed on each other, which enhances the vibration of the electromagnetic drive system 130, and further enhances the vibration effect of the back cover 300.
  • the present invention can achieve two different effects in the working process of the screen sounding mobile phone through the different designs of the magnetic steel inside the device: the first is to offset the vibration of the back cover 300 and improve the user's holding experience; the second is to make The vibration of the back cover 300 is increased, and the back cover 300 is used to sound simultaneously with the screen to enhance the sound effect.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Electromagnetism (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

本发明提供了一种屏幕发声激励器及电子设备。本发明的屏幕发声激励器包括沿所述显示屏的振动方向自上而下依次设置的第一磁路系统、电磁驱动系统及第二磁路系统，所述第一磁路系统与所述显示屏固定，所述电磁驱动系统与所述后盖固定，所述屏幕发声激励器还包括一端与所述第二磁路系统连接以弹性支撑所述第二磁路系统、另一端固定于所述电磁驱动系统的弹性件。本发明的第一磁路系统与显示屏相连，可以在电磁驱动系统的电磁场影响下带动显示屏屏幕发声，电磁驱动系统与后盖相连，第一磁路系统与第二磁路系统可以相互作用抵消或增强电磁驱动系统的振动效果，从而使后盖振动效果增强或消除。

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】
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。
【 技术问题】
本发明的目的在于提供一种使后盖振动效果增强或消除的屏幕发声激励器及电子设备。
【 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，应用于电子设备，所述电子设备包括由所述激励器驱动发声的显示屏、与所述显示屏围设成收容空间的后盖，所述屏幕发声激励器包括沿所述显示屏的振动方向自上而下依次设置的第一磁路系统、电磁驱动系统及第二磁路系统，所述第一磁路系统与所述显示屏固定，所述电磁驱动系统与所述后盖固定，所述屏幕发声激励器还包括一端与所述第二磁路系统连接以弹性支撑所述第二磁路系统、另一端固定于所述电磁驱动系统的弹性件。
进一步地，所述第一磁路系统包括一面固定于所述显示屏上的屏幕连接板以及固定于所述屏幕连接板的另一面的第一磁钢。
进一步地，所述第二磁路系统包括通过弹性件与所述支撑架相连的质量块以及固定于所述质量块中空位置的第二磁钢。
进一步地，所述电磁驱动系统包括固定于所述后盖上的支撑架、固定于支撑架上的音圈以及插置于所述音圈中空位置的铁芯，所述第一振动间隙形成于所述第一磁钢与所述铁芯之间，所述第二振动间隙形成于所述第二磁钢与所述铁芯之间。
进一步地，所述弹性件包括与所述支撑架固定连接的第一连接部、与所述质量块固定连接的第二连接部以及一端与所述第一连接部连接且另一端与所述第二连接部连接的弹簧体。
进一步地，所述支撑架包括固定音圈的第一架体以及固定于后盖上的第二架体，所述第一连接部夹持在所述第一架体与所述第二架体之间。
进一步地，所述第一连接部为与所述第一架体的外边缘以及第二架体的外边缘相适配的第一圈形连接片，所述第二连接部为与质量块的外边缘相适配的第二圈形连接片，所述第二圈形连接片通过所述弹簧体固定于所述第一圈形连接片的空心槽体内。
进一步地，所述第一磁钢以及所述第二磁钢均为永磁体，且所述第一磁钢与所述第二磁钢的极性排布方向相同。
进一步地，所述第一磁钢以及所述第二磁钢均为永磁体，且所述第一磁钢与所述第二磁钢的极性排布方向相反。
本发明的一种电子设备，包括显示屏、固定所述显示屏的中框、与中框固定连接的后盖以及容置于中框内的电池，其特征在于，所述电子设备还包括设置于所述后盖上并与所述显示屏相连的至少一个上述的屏幕发声激励器。
【 有益效果】
本发明的有益效果在于：本发明的屏幕发声激励器通过将磁路系统分为第一磁路系统以及第二磁路系统分别与电磁驱动系统形成第一振动间隙以及第二振动间隙，第一磁路系统与显示屏相连，可以在电磁驱动系统的电磁场影响下带动显示屏屏幕发声，电磁驱动系统与后盖相连，第一磁路系统与第二磁路系统可以相互作用抵消或增强电磁驱动系统的振动效果，从而使后盖振动效果增强或消除。
【 附图说明】
图1为本发明实施例中电子设备的立体结构示意图；
图2为本发明实施例中电子设备沿图1中A-A方向的剖视图；
图3为本发明实施例中屏幕发声激励器的结构示意图；
图4为本发明实施例中屏幕发声激励器的立体分解结构示意图；
图5为本发明实施例中屏幕发声激励器沿图3中B-B方向的剖视图；
图6为本发明实施例中弹性件的结构示意图；
图7为本发明实施例中屏幕发声激励器的第一种磁极性关系示意图；
图8为本发明实施例中屏幕发声激励器的第二种磁极性关系示意图；
图9为本发明实施例中屏幕发声激励器的第三种磁极性关系示意图
图10为本发明实施例中屏幕发声激励器的第四种磁极性关系示意图。
【 具体实施方式】
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400、与中框400固定连接的后盖300、容置于中框400内的电池500，以及设置于后盖300上并与显示屏200固定连接的至少一个的屏幕发声激励器100。中框400与屏幕发声激励器100之间无直接连接关系，中框400上设置有多个便于屏幕发声激励器100穿过固定于后盖300上的通孔410。
请进一步参阅图1-5，一种屏幕发声激励器100，包括沿显示屏200的振动方向自上而下依次设置的第一磁路系统110、电磁驱动系统130及第二磁路系统120，第一磁路系统110与显示屏200固定，电磁驱动系统130与后盖300固定，屏幕发声激励器100还包括一端与第二磁路系统120连接以弹性支撑第二磁路系统120、另一端固定于电磁驱动系统130的弹性件140。第一磁路系统110的底部与电磁驱动系统130的顶部之间具有第一振动间隙113，第二磁路系统120的顶部与电磁驱动系统130的底部之间具有第二振动间隙123。
相较于现有技术，本发明的屏幕发声激励器100通过将磁路系统分为第一磁路系统110以及第二磁路系统120分别与电磁驱动系统130形成第一振动间隙113以及第二振动间隙123，第一磁路系统110与显示屏200相连，可以在电磁驱动系统130的电磁场影响下带动显示屏200屏幕发声，电磁驱动系统130与后盖300相连，第一磁路系统110与第二磁路系统120可以相互作用抵消或增强电磁驱动系统130的振动效果，从而使后盖300振动效果增强或消除。
在本实施例中，第一磁路系统110包括一面固定于显示屏200上的屏幕连接板112以及固定于屏幕连接板112的另一面的第一磁钢111。屏幕连接板112的一面与显示屏200的内表面相接触，屏幕连接板112的另一面与第一磁钢111固定，当第一磁钢111受到电磁驱动系统130的电磁场影响时，在第一振动间隙113中带动显示屏200振动发声。
在本实施例中，第二磁路系统120包括通过弹性件140与支撑架133相连的质量块122以及固定于质量块122中空位置的第二磁钢121。质量块122用于固定第二磁钢121，同时具备一定重量可以向电磁驱动系统130提供一定反作用力。
在本实施例中，电磁驱动系统130包括固定于后盖300上的支撑架133、固定于支撑架133上的音圈131以及插置于音圈131中空位置的铁芯132，第一振动间隙113形成于第一磁钢111与铁芯132之间，第二振动间隙123形成于第二磁钢121与铁芯132之间。音圈131与电子设备中的控制主板电连接，在音圈131内流入电流后形成以铁芯132为中心的电磁场，铁芯132分别与第一磁钢111以及第二磁钢121相对的两端产生相对两极，由于电磁场的作用，第一磁钢111与第二磁钢121分别对应产生振动效果。
请进一步参阅图6，弹性件140包括与支撑架133固定连接的第一连接部141、与质量块122固定连接的第二连接部142以及一端与第一连接部141连接且另一端与第二连接部142连接的弹簧体143。
在本实施例中，支撑架133包括固定音圈131的第一架体1331以及固定于后盖300上的第二架体1332，第一连接部141夹持在第一架体1331与第二架体1332之间。第一架体1331与第二架体1332固定连接，并实现了第一连接部141的固定。
在本实施例中，第一连接部141为与第一架体1331的外边缘以及第二架体1332的外边缘相适配的第一圈形连接片，第一圈形连接片的两面分别通过胶水与第一架体1331的边缘位置以及第二架体1332的边缘位置无缝粘接，第二连接部142为与质量块122的外边缘相适配的第二圈形连接片，第二圈形连接片的一面通过胶水与质量块122的边缘位置无缝粘接，第二圈形连接片通过弹簧体143固定于第一圈形连接片的空心槽体内。第一圈形连接片的外径大于第二圈形连接片的外径，在电磁场的影响下，弹簧体143弯曲，使第一圈形连接片与第二圈形连接片在不同的高度位置振动。弹簧体143为具有延展性的直的或弯曲的弹片结构，弹簧体143的数量根据第一圈形连接片与第二圈形连接片的具体形状而确定。
请进一步参阅图7-8，第一磁钢111以及第二磁钢121均为永磁体，且第一磁钢111与第二磁钢121的极性排布方向相同。如图7所示，第一磁钢111以及第二磁钢121的N极均朝上，S极均朝下；当线圈电流使电磁驱动系统130中的铁芯132的S极朝上，铁芯132的N极朝下时（如图7-1），第一磁钢111与铁芯132之间以及第二磁钢121与铁芯132之间均呈现相互排斥力，两种排斥力方向相反可以相互抵消，减弱了电磁驱动系统130的振动，进而降低了后盖300的振动效果。当线圈电流使电磁驱动系统130中的铁芯132的N极朝上，铁芯132的S极朝下时（如图7-2），第一磁钢111与铁芯132之间以及第二磁钢121与铁芯132之间均呈现相互吸引力，两种吸引力方向相反可以相互抵消，减弱了电磁驱动系统130的振动，进而降低了后盖300的振动效果。如图8所示，第一磁钢111以及第二磁钢121的S极均朝上，N极均朝下，图8-2中的作用原理与图7-1中类似，图8-1中的作用原理与图7-2中类似，达到效果相同，故在此不做赘述。
请进一步参阅图9-10，第一磁钢111以及第二磁钢121均为永磁体，且第一磁钢111与第二磁钢121的极性排布方向相反。如图9所示，第一磁钢111的N极朝上，S极朝下，第二磁钢121的S极朝上，N极朝下；当线圈电流使电磁驱动系统130中的铁芯132的S极朝上，铁芯132的N极朝下时（如图9-1），第一磁钢111与铁芯132之间均呈现相互排斥力，第二磁钢121与铁芯132之间呈现相互吸引力，此时铁芯132受到的排斥力与吸引力方向相同，两种作用力可以相互叠加，增强了电磁驱动系统130的振动，进而增强了后盖300的振动效果，使其与屏幕一起振动发声。当线圈电流使电磁驱动系统130中的铁芯132的N极朝上，铁芯132的S极朝下时（如图9-2），第一磁钢111与铁芯132之间均呈现相互吸引力，第二磁钢121与铁芯132之间呈现相互排斥力，此时铁芯132受到的吸引力与排斥力方向相同，两种作用力可以相互叠加，增强了电磁驱动系统130的振动，进而增强了后盖300的振动效果，使其与屏幕一起振动发声。如图10所示，第一磁钢111的S极朝上，N极朝下，第二磁钢121的N极朝上，S极朝下，图10-2中的作用原理与图9-1中类似，图10-1中的作用原理与图9-2中类似，达到效果相同，故在此不做赘述。
综上，本发明通过器件内部磁钢的不同设计，可以实现屏幕发声手机工作过程中两种不同的效果：第一种为使后盖300振动抵消，提升用户握持体验；第二种为使后盖300振动增大，利用后盖300与屏幕同时发声，提升声音效果。
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，应用于电子设备，所述电子设备包括由所述激励器驱动发声的显示屏、与所述显示屏围设成收容空间的后盖，其特征在于，所述屏幕发声激励器包括沿所述显示屏的振动方向自上而下依次设置的第一磁路系统、电磁驱动系统及第二磁路系统，所述第一磁路系统与所述显示屏固定，所述电磁驱动系统与所述后盖固定，所述屏幕发声激励器还包括一端与所述第二磁路系统连接以弹性支撑所述第二磁路系统、另一端固定于所述电磁驱动系统的弹性件。
  2. 根据权利要求1所述的屏幕发声激励器，其特征在于，所述第一磁路系统包括一面固定于所述显示屏上的屏幕连接板以及固定于所述屏幕连接板的另一面的第一磁钢。
  3. 根据权利要求2所述的屏幕发声激励器，其特征在于，所述电磁驱动系统包括固定于所述后盖上的支撑架、固定于支撑架上的音圈以及插置于所述音圈中空位置的铁芯。
  4. 根据权利要求3所述的屏幕发声激励器，其特征在于，所述第二磁路系统包括通过弹性件与所述支撑架相连的质量块以及固定于所述质量块中空位置的第二磁钢。
  5. 根据权利要求4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支撑架固定连接的第一连接部、与所述质量块固定连接的第二连接部以及一端与所述第一连接部连接且另一端与所述第二连接部连接的弹簧体。
  6. 根据权利要求5所述的屏幕发声激励器，其特征在于，所述支撑架包括固定音圈的第一架体以及固定于后盖上的第二架体，所述第一连接部夹持在所述第一架体与所述第二架体之间。
  7. 根据权利要求5所述的屏幕发声激励器，其特征在于，所述第一连接部为与所述第一架体的外边缘以及第二架体的外边缘相适配的第一圈形连接片，所述第二连接部为与质量块的外边缘相适配的第二圈形连接片，所述第二圈形连接片通过所述弹簧体固定于所述第一圈形连接片的空心槽体内。
  8. 根据权利要求4所述的屏幕发声激励器，其特征在于，所述第一磁钢以及所述第二磁钢均为永磁体，且所述第一磁钢与所述第二磁钢的极性排布方向相同。
  9. 根据权利要求4所述的屏幕发声激励器，其特征在于，所述第一磁钢以及所述第二磁钢均为永磁体，且所述第一磁钢与所述第二磁钢的极性排布方向相反。
  10. 一种电子设备，包括显示屏、固定所述显示屏的中框、与中框固定连接的后盖以及容置于中框内的电池，其特征在于，所述电子设备还包括设置于所述后盖上并与所述显示屏相连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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