WO2018205353A1 - 一种直线移动双位稳态电磁开关 - Google Patents

一种直线移动双位稳态电磁开关 Download PDF

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Publication number
WO2018205353A1
WO2018205353A1 PCT/CN2017/088936 CN2017088936W WO2018205353A1 WO 2018205353 A1 WO2018205353 A1 WO 2018205353A1 CN 2017088936 W CN2017088936 W CN 2017088936W WO 2018205353 A1 WO2018205353 A1 WO 2018205353A1
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WO
WIPO (PCT)
Prior art keywords
coil
electromagnetic switch
linearly moving
state electromagnetic
switch according
Prior art date
Application number
PCT/CN2017/088936
Other languages
English (en)
French (fr)
Inventor
冯力
颜陶
颜天宝
Original Assignee
佛山市川东磁电股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 佛山市川东磁电股份有限公司 filed Critical 佛山市川东磁电股份有限公司
Priority to US16/323,327 priority Critical patent/US11979708B2/en
Publication of WO2018205353A1 publication Critical patent/WO2018205353A1/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
    • 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
    • H04R1/2884—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of the enclosure structure, i.e. strengthening or shape of the enclosure
    • H04R1/2888—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of the enclosure structure, i.e. strengthening or shape of the enclosure for 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
    • 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
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/2815—Enclosures comprising vibrating or resonating arrangements of the bass reflex type
    • H04R1/2823—Vents, i.e. ports, e.g. shape thereof or tuning thereof with damping material
    • H04R1/2826—Vents, i.e. ports, e.g. shape thereof or tuning thereof with damping material for loudspeaker transducers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/081—Magnetic constructions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1607—Armatures entering the winding
    • H01F7/1615—Armatures or stationary parts of magnetic circuit having permanent magnet
    • 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
    • H04R1/025—Arrangements for fixing loudspeaker transducers, e.g. in a box, furniture
    • 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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H01F2007/1669—Armatures actuated by current pulse, e.g. bistable actuators
    • 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 
    • H04R1/225—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only  for telephonic receivers
    • 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
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's

Definitions

  • the present invention relates to an electromagnetic switch, and more particularly to a linearly moving double-position steady-state electromagnetic switch.
  • an object of the present invention is to provide a linearly moving two-position steady-state electromagnetic switch through which the leakage hole can be closed according to the multimedia mode and the call mode. Improves call distortion without reducing high frequency sound.
  • a linearly moving two-position steady-state electromagnetic switch includes a coil, a magnetic mover movably disposed in a bore of the coil, a casing enclosing the outer side of the coil, and a casing disposed between the coil and the casing An insulating layer; the magnetic mover is movable under the action of a magnetic field generated after the coil is energized; one end of the magnetic mover protrudes outside the coil and is connected with a blocking piece for closing the speaker leakage hole.
  • the linearly moving double-position steady-state electromagnetic switch wherein the housing comprises a base iron piece, and a metal half-shell connected to the base iron piece; the two ends of the base iron piece are respectively disposed with a vertical
  • the first hemming edge and the second hemming edge in the moving direction of the magnetic mover, the first hemming edge and the second hemming edge and the magnetic mover have a space therebetween
  • a through hole is disposed on the second flange of the blocking piece.
  • the linearly moving double-position steady-state electromagnetic switch wherein the magnetic mover includes a magnet fixing seat provided with a fixing groove, and two permanent magnets installed in the fixing groove in a manner opposite to the same pole A shielding block is connected between the two permanent magnets; the blocking piece is fixed at one end of the magnet fixing seat.
  • the present invention provides a linearly moving two-position steady-state electromagnetic switch, comprising a coil, a magnetic mover movably disposed in the inner bore of the coil, a housing enclosing the outer side of the coil, and a coil and a shell disposed
  • the insulating layer between the bodies; the magnetic mover can move under the action of a magnetic field generated after the coil is energized; one end of the magnetic mover protrudes out of the coil and is connected with a blocking piece for closing the leakage hole of the speaker.
  • the magnetic mover By changing the direction of the current in the coil, the magnetic mover can be extended or retracted, thereby driving the plug to block or release the leak hole, which can improve the call distortion without reducing the high frequency sound.
  • FIG. 1 is a perspective view of a linearly moving double-position steady-state electromagnetic switch provided by the present invention.
  • FIG. 2 is a perspective view of a linearly moving two-position steady-state electromagnetic switch provided by the present invention.
  • 3 is a structural diagram of a linearly moving double-position steady-state electromagnetic switch provided by the present invention.
  • 4 is a schematic structural view of a magnetic mover in a linearly moving two-position steady-state electromagnetic switch provided by the present invention.
  • the present invention provides a linearly moving two-position steady-state electromagnetic switch.
  • the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
  • the present invention provides a linearly moving two-position steady-state electromagnetic switch, comprising a coil 1, a magnetic mover 2 movably disposed in a bore of the coil, and a shell enclosing the outer side of the coil a body 3, and an insulating layer 4 disposed between the coil and the casing; the magnetic mover 2 is movable under the action of a magnetic field generated after the coil 1 is energized; one end of the magnetic mover protrudes out of the coil and is connected There is a blocking piece 211 for closing the speaker leakage hole.
  • the electromagnetic shut-off structure is simple and reliable.
  • the electromagnetic switch is installed in the mobile phone, so that the blocking piece 211 faces the leakage hole on the speaker sound cavity.
  • the electromagnetic switch is energized to extend the magnetic mover 2, and the driving blocking piece 211 is blocked.
  • the leakage hole is kept, so that the high-frequency sound of the speaker does not decrease; when the mobile phone switches to the call mode, the reverse current is turned off to the electromagnetic ⁇ to retract the magnetic mover, and the drive block is placed in the leakage hole, thereby improving the speaker. Low frequency distortion.
  • the housing 3 includes a base iron piece 31, and a metal half-shell 32 connected to the base iron piece.
  • the two ends of the base iron piece 31 are respectively disposed perpendicular to the magnetic mover. 2
  • a first flange 31 1 and a second flange 312 in the moving direction, the first flange and the second flange have a gap between the two ends of the magnetic mover, and are adjacent to the second flange 312 of the blocking piece 211
  • the through hole 313 is provided.
  • the first hemming edge and the second hemming edge act as a limit on the magnetic mover to prevent the magnetic mover from coming out of the coil during transportation and use; in addition, when the magnetic mover is moved by force, it will be under the action of its own magnetic force. Adsorbed on the first hemming edge or the second hemming edge, so that it is not necessary to maintain a closed state by continuous current, and only need to pass a pulse current to change the closed state, thereby saving the power of the mobile phone and improving the life of the electromagnetic switch. .
  • the magnetic mover 2 includes a magnet holder 21 provided with a fixing groove 212, and two magnets are mounted on the same pole (S or N).
  • the material of the shielding block 23 may be iron or other material having a large magnetic permeability. In fact, if you put one The whole magnet is placed in the inner hole of the coil. Since the force received at both ends of the magnet is always in the opposite direction and the size is equal, it cannot move.
  • the shielding block can shield the magnetic field of the permanent magnet from the end connected to the shielding block, so that the opposite end of the two magnets and the external magnetic field (the magnetic field of the coil) are reduced, and the opposite ends are subjected to The influence is very small. Therefore, the axial force received by the opposite end is greater than the axial force of the opposite end, and because the opposite ends have the same polarity, the force direction is the same, so the total axial force that the magnetic mover will receive is not It is zero, thus realizing the ability of the magnetic mover to move under the magnetic field of the coil.
  • the blocking piece 211 is provided with a gasket 213 as shown in FIG.
  • the gasket can be a sponge pad, a leather pad, a felt pad or other gasket with a gas-tight effect.
  • the gasket is designed to prevent air leakage in the speaker cavity in the closed state, thus ensuring that the speaker's high frequency sound is not degraded in the off state.
  • the magnetic mover 2 and the inner wall of the coil 1 have a gap of not more than 0.05 mm.
  • the length, width and height of the electromagnetic switch are not more than 7 mm, 6 mm, and 3 mm, respectively, and the gap between the magnetic mover and the inner wall of the coil is set within the range, thereby ensuring magnetic movement.
  • the sub-occupation fully occupies the inner space of the coil to improve the electromagnetic force, and ensures that the magnetic mover moves smoothly.
  • the distance between the blocking piece 211 and the second folded edge 312 is 0.5 to 2 mm.
  • the distance is 1 mm, and the distance can ensure that the air in the speaker sound chamber can be unimpeded in the snoring state, thereby ensuring low frequency without distortion, and the electromagnetic smashing structure is compact, occupying a small installation space of the mobile phone device. .
  • the metal half-shells 32 are provided at both ends with a plurality of fixing flaps 32 1, as shown in Figs.
  • the insulating layer 4 is an insulating paper.
  • the insulating layer can also be an insulating paste, an insulating varnish or other insulating material.
  • a pin positioning ring 314 for fixing the coil pin 11 is respectively disposed on the base iron piece 31 at positions on both sides of the root portion of the first flange 311. Setting the pin positioning ring prevents the coil pin from being pulled and damaging the internal structure of the coil.
  • the present invention provides a linearly moving two-position steady-state electromagnetic switch, comprising a coil, a magnetic mover movably disposed in the inner hole of the coil, and a casing enclosing the outer side of the coil, And an insulating layer disposed between the coil and the housing; the magnetic mover can be moved down by a magnetic field generated after the coil is energized One end of the magnetic mover protrudes out of the coil and is connected with a blocking piece for closing the leakage hole of the speaker. By changing the direction of the current in the coil, the magnetic mover can be extended or retracted, thereby driving the plug to block or release the leak hole, which can improve the call distortion without reducing the high frequency sound effect.
  • the electromagnetic switch does not have to maintain the closed state by the continuous current, thereby saving the power of the mobile phone and improving the life of the electromagnetic switch.
  • a gasket is placed on the blocking piece to prevent air leakage in the speaker cavity in the closed state, thereby ensuring that the high-frequency sound of the speaker does not decrease in the off state.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Power Engineering (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Push-Button Switches (AREA)

Abstract

一种直线移动双位稳态电磁开关，包括线圈（1），可移动地设置在线圈（1）内孔中的磁性动子（2），包裹线圈（1）外侧面的壳体（3），以及设置在线圈（1）与壳体（3）之间的绝缘层（4）；磁性动子（2）能够在线圈（1）通电后产生的磁场的作用下移动；磁性动子（2）的一端伸出线圈（1）外并连接有用于开闭扬声器泄漏孔的堵片（211）。通过改变线圈中电流的方向可以使磁性动子伸出或缩回，从而驱使堵片堵住或放开泄漏孔，既可改善通话失真情况而又不降低高频音效。

Description

一种直线移动双位稳态电磁幵关 技术领域
[0001] 本发明涉及一种电磁幵关， 特别涉及一种直线移动双位稳态电磁幵关。
背景技术
[0002] 目前市场上有一些手机具有两个扬声器以产生环绕立体声效果， 这类手机通常 用一侧的扬声器替代听筒， 在进行通话吋通过电路的切换， 把该扬声器的功率 降低， 使其音量降低到适合贴近耳朵倾听的程度。 然而为了使语音不失真， 一 般听筒的有效频率范围为 300-3400HZ的低频， 而一般扬声器在该频率范围内失 真较严重， 因此使用扬声器替代听筒， 在通话吋存在失真现象。 为此， 一些现 在技术中， 在该扬声器的音腔上幵设泄漏孔以改善低频失真的问题， 但是又导 致了高频音效的下降。
[0003] 可见， 现有技术还有待改进和提高。
技术问题
[0004] 鉴于上述现有技术的不足之处， 本发明的目的在于提供一种直线移动双位稳态 电磁幵关， 通过该电磁幵关可以根据多媒体模式和通话模式进行泄漏孔的关和 幵， 改善通话失真情况而又不降低高频音效。
问题的解决方案
技术解决方案
[0005] 为了达到上述目的， 本发明采取了以下技术方案：
[0006] 一种直线移动双位稳态电磁幵关， 包括线圈， 可移动地设置在线圈内孔中的磁 性动子， 包裹线圈外侧面的壳体， 以及设置在线圈与壳体之间的绝缘层； 所述 磁性动子能够在线圈通电后产生的磁场的作用下移动； 所述磁性动子的一端伸 出线圈外并连接有用于幵闭扬声器泄漏孔的堵片。
[0007] 所述的直线移动双位稳态电磁幵关， 其中， 所述壳体包括底座铁片， 以及与底 座铁片连接的金属半壳； 所述底座铁片的两端分别设置有垂直于磁性动子移动 方向的第一折边和第二折边， 第一折边和第二折边与磁性动子两端之间具有间 隙， 靠近所述堵片的第二折边上幵设有透孔。
[0008] 所述的直线移动双位稳态电磁幵关， 其中， 所述磁性动子包括设置有固定槽的 磁铁固定座， 以及两个以同极相对的方式安装在固定槽中的永磁铁； 两个永磁 铁之间连接有屏蔽块； 所述堵片固定在磁铁固定座的一端。
[0009] 所述的直线移动双位稳态电磁幵关， 其中， 所述屏蔽块的材料为铁。
[0010] 所述的直线移动双位稳态电磁幵关， 其中， 所述堵片上设置有密封垫。
[0011] 所述的直线移动双位稳态电磁幵关， 其中， 所述磁性动子与线圈内孔壁之间具 有不大于 0.05mm的间隙。
[0012] 所述的直线移动双位稳态电磁幵关， 其中， 当磁性动子缩回吋， 所述堵片与第 二折边之间的距离为 0.5〜2mm。
[0013] 所述的直线移动双位稳态电磁幵关， 其中， 所述金属半壳的两端设置有若干固 定折片。
[0014] 所述的直线移动双位稳态电磁幵关， 其中， 所述绝缘层为绝缘纸。
[0015] 所述的直线移动双位稳态电磁幵关， 其中， 所述底座铁片上位于第一折边的根 部两侧的位置分别设置- 用于固定线圈引脚的引脚定位圈
发明的有益效果
有益效果
[0016] 本发明提供了一种直线移动双位稳态电磁幵关， 包括线圈， 可移动地设置在线 圈内孔中的磁性动子， 包裹线圈外侧面的壳体， 以及设置在线圈与壳体之间的 绝缘层； 所述磁性动子能够在线圈通电后产生的磁场的作用下移动； 所述磁性 动子的一端伸出线圈外并连接有用于幵闭扬声器泄漏孔的堵片。 通过改变线圈 中电流的方向可以使磁性动子伸出或缩回， 从而驱使堵片堵住或放幵泄漏孔， 既可改善通话失真情况而又不降低高频音效。
对附图的简要说明
附图说明
[0017] 图 1为本发明提供的直线移动双位稳态电磁幵关的立体图。
[0018] 图 2为本发明提供的直线移动双位稳态电磁幵关的立体图。
[0019] 图 3为本发明提供的直线移动双位稳态电磁幵关的结构图。 [0020] 图 4为本发明提供的直线移动双位稳态电磁幵关中， 磁性动子的结构示意图。 实施该发明的最佳实施例
本发明的最佳实施方式
[0021] 本发明提供一种直线移动双位稳态电磁幵关， 为使本发明的目的、 技术方案及 效果更加清楚、 明确， 以下参照附图并举实施例对本发明进一步详细说明。 应 当理解， 此处所描述的具体实施例仅用以解释本发明， 并不用于限定本发明。
[0022] 请参阅图 1-4， 本发明提供一种直线移动双位稳态电磁幵关， 包括线圈 1， 可移 动地设置在线圈内孔中的磁性动子 2， 包裹线圈外侧面的壳体 3， 以及设置在线 圈与壳体之间的绝缘层 4; 所述磁性动子 2能够在线圈 1通电后产生的磁场的作用 下移动； 所述磁性动子的一端伸出线圈外并连接有用于幵闭扬声器泄漏孔的堵 片 211。
[0023] 该电磁幵关结构简单， 幵关可靠。 把该电磁幵关安装在手机中， 令堵片 211正 对扬声器音腔上的泄漏孔， 当手机处于多媒体模式吋， 向该电磁幵关通电使磁 性动子 2伸出， 驱动堵片 211堵住泄漏孔， 从而保持扬声器的高频音效不下降； 当手机切换到通话模式吋， 向该电磁幵关通反向电流使磁性动子缩回， 驱动堵 片放幵泄漏孔， 从而改善扬声器的低频失真情况。
[0024] 具体的， 见图 3， 所述壳体 3包括底座铁片 31， 以及与底座铁片连接的金属半壳 32； 所述底座铁片 31的两端分别设置有垂直于磁性动子 2移动方向的第一折边 31 1和第二折边 312， 第一折边和第二折边与磁性动子两端之间具有间隙， 靠近所 述堵片 211的第二折边 312上幵设有透孔 313。 第一折边和第二折边对磁性动子起 限位作用， 防止磁性动子在运输和使用过程中从线圈中脱出； 此外， 当磁性动 子受力移动后会在本身磁力的作用下吸附在第一折边或第二折边上， 这样可以 不必通过持续电流来维持幵闭状态， 使用吋仅需要通入脉冲电流来改变幵闭状 态， 从而节省手机电源并提高电磁幵关的寿命。
[0025] 进一步的， 见图 3、 4， 所述磁性动子 2包括设置有固定槽 212的磁铁固定座 21， 以及两个以同极 （S极或 N极均可） 相对的方式安装在固定槽 212中的永磁铁 22; 两个永磁铁 22之间连接有屏蔽块 23; 所述堵片 211固定在磁铁固定座 21的一端。 所述屏蔽块 23的材料可以是铁或者其他磁导率较大的材料。 事实上， 如果把一 整块磁铁放在线圈内孔中， 由于磁铁两端受到的力总是方向相反、 大小相当的 ， 因此无法移动。 本申请中， 屏蔽块能够对永磁铁的、 与屏蔽块连接的一端的 磁场起屏蔽作用， 使两个磁铁相对的一端与外磁场 （线圈的磁场） 的作用力降 低， 而相背的一端受到的影响很小， 因此， 相背端受到的轴向力大于相对端的 轴向力， 又因为相背的一端极性也相同导致受力方向相同， 因此磁性动子会受 到的总轴向力不为零， 从而实现了磁性动子在线圈的磁场下的移动能力。
[0026] 在本实施例中， 所述堵片 211上设置有密封垫 213， 如图 4所示。 密封垫可以是 海绵垫、 皮革垫、 毛毡垫或者其他具有气密封效果的垫片。 密封垫的设置可以 防止关闭状态下扬声器音腔中的空气泄漏， 从而保证了关闭状态下扬声器高频 音效不下降。
[0027] 进一步的， 所述磁性动子 2与线圈 1内孔壁之间具有不大于 0.05mm的间隙。 事 实上在本实施例中， 电磁幵关的长、 宽、 高分别不超过 7mm、 6mm、 3mm, 磁 性动子与线圈内孔壁之间的间隙设置在所述范围内， 既能保证磁性动子充分占 据线圈内部空间从而提高电磁力， 又能保证磁性动子移动顺畅。
[0028] 具体的， 当磁性动子 2缩回吋， 所述堵片 211与第二折边 312之间的距离为 0.5〜2 mm。 优选的， 该距离为 lmm， 该距离既能保证打幵状态下， 扬声器音腔中的空 气能够流通不受阻， 从而保证低频不失真， 又能使电磁幵关结构紧凑、 占用手 机设备安装空间小。
[0029] 为了防止线圈 1从壳体 3中脱出， 所述金属半壳 32的两端设置有若干固定折片 32 1， 如图 1-3所示。
[0030] 在本实施例中， 所述绝缘层 4为绝缘纸。 绝缘层还可以是绝缘胶、 绝缘漆或者 用其他绝缘材料。
[0031] 此外， 见图 1-3， 所述底座铁片 31上位于第一折边 311的根部两侧的位置分别设 置一个用于固定线圈引脚 11的引脚定位圈 314。 设置引脚定位圈可以防止线圈引 脚受到拉力吋， 破坏线圈内部结构。
[0032] 综上所述， 本发明提供了一种直线移动双位稳态电磁幵关， ， 包括线圈， 可移 动地设置在线圈内孔中的磁性动子， 包裹线圈外侧面的壳体， 以及设置在线圈 与壳体之间的绝缘层； 所述磁性动子能够在线圈通电后产生的磁场的作用下移 动； 所述磁性动子的一端伸出线圈外并连接有用于幵闭扬声器泄漏孔的堵片。 通过改变线圈中电流的方向可以使磁性动子伸出或缩回， 从而驱使堵片堵住或 放幵泄漏孔， 既可改善通话失真情况而又不降低高频音效。
[0033] 此外， 通过设置第一折边和第二折边， 使电磁幵关不必通过持续电流来维持幵 闭状态， 从而节省手机电源并提高电磁幵关的寿命。 在堵片上设置密封垫， 防 止关闭状态下扬声器音腔中的空气泄漏， 从而保证了关闭状态下扬声器高频音 效不下降。 通过合理设置堵片与第二折边的距离， 使扬声器音腔中的空气能够 流通不受阻的同吋， 缩小电磁幵关的占用空间。 设置引脚定位圈防止线圈引脚 受到拉力吋， 破坏线圈内部结构。
[0034] 可以理解的是， 对本领域普通技术人员来说， 可以根据本发明的技术方案及其 发明构思加以等同替换或改变， 而所有这些改变或替换都应属于本发明所附的 权利要求的保护范围。

Claims

权利要求书
[权利要求 1] 一种直线移动双位稳态电磁幵关， 其特征在于， 包括线圈， 可移动地 设置在线圈内孔中的磁性动子， 包裹线圈外侧面的壳体， 以及设置在 线圈与壳体之间的绝缘层； 所述磁性动子能够在线圈通电后产生的磁 场的作用下移动； 所述磁性动子的一端伸出线圈外并连接有用于幵闭 扬声器泄漏孔的堵片。
[权利要求 2] 根据权利要求 1所述的直线移动双位稳态电磁幵关， 其特征在于， 所 述壳体包括底座铁片， 以及与底座铁片连接的金属半壳； 所述底座铁 片的两端分别设置有垂直于磁性动子移动方向的第一折边和第二折边 ， 第一折边和第二折边与磁性动子两端之间具有间隙， 靠近所述堵片 的第二折边上幵设有透孔。
[权利要求 3] 根据权利要求 1所述的直线移动双位稳态电磁幵关， 其特征在于， 所 述磁性动子包括设置有固定槽的磁铁固定座， 以及两个以同极相对的 方式安装在固定槽中的永磁铁； 两个永磁铁之间连接有屏蔽块； 所述 堵片固定在磁铁固定座的一端。
[权利要求 4] 根据权利要求 3所述的直线移动双位稳态电磁幵关， 其特征在于， 所 述屏蔽块的材料为铁。
[权利要求 5] 根据权利要求 1-4任一项所述的直线移动双位稳态电磁幵关， 其特征 在于， 所述堵片上设置有密封垫。
[权利要求 6] 根据权利要求 1所述的直线移动双位稳态电磁幵关， 其特征在于， 所 述磁性动子与线圈内孔壁之间具有不大于 0.05mm的间隙。
[权利要求 7] 根据权利要求 2所述的直线移动双位稳态电磁幵关， 其特征在于， 当 磁性动子缩回吋， 所述堵片与第二折边之间的距离为 0.5〜2mm。
[权利要求 8] 根据权利要求 2所述的直线移动双位稳态电磁幵关， 其特征在于， 所 述金属半壳的两端设置有若干固定折片。
[权利要求 9] 根据权利要求 1所述的直线移动双位稳态电磁幵关， 其特征在于， 所 述绝缘层为绝缘纸。
[权利要求 10] 根据权利要求 2所述的直线移动双位稳态电磁幵关， 其特征在于， 所 述底座铁片上位于第一折边的根部两侧的位置分别设置一个用于固定 线圈引脚的引脚定位圈。
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