WO2017133181A1 - 音圈电机 - Google Patents

音圈电机 Download PDF

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Publication number
WO2017133181A1
WO2017133181A1 PCT/CN2016/088491 CN2016088491W WO2017133181A1 WO 2017133181 A1 WO2017133181 A1 WO 2017133181A1 CN 2016088491 W CN2016088491 W CN 2016088491W WO 2017133181 A1 WO2017133181 A1 WO 2017133181A1
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WO
WIPO (PCT)
Prior art keywords
voice coil
coil motor
hole
magnet
end cover
Prior art date
Application number
PCT/CN2016/088491
Other languages
English (en)
French (fr)
Inventor
李增
谈恒
魏文远
Original Assignee
深圳市科曼医疗设备有限公司
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 深圳市科曼医疗设备有限公司 filed Critical 深圳市科曼医疗设备有限公司
Priority to EP16888999.6A priority Critical patent/EP3413445B1/en
Publication of WO2017133181A1 publication Critical patent/WO2017133181A1/zh

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/18—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators

Definitions

  • the present invention relates to the field of motor technology, and more particularly to voice coil motors.
  • Voice coil motor VCM It is a kind of motor.
  • the voice coil motor is generally composed of a ferromagnetic cylinder, a permanent magnet, a coil support, a tubular coil and the like.
  • the working principle is: the electromagnetic force is generated after the coil is energized, and the load is linearly moved, and the magnitude and direction of the electromagnetic force can be changed by changing the strength and polarity of the current.
  • the volume of permanent magnets in conventional voice coil motors is greatly limited, which seriously affects the motor power caused by the strength of the magnetic field. This structure will also cause a considerable degree of magnetic flux leakage, which will reduce the utilization of the magnetic field.
  • the design of the coil support is generally single and cumbersome, which will also greatly reduce the power of the motor.
  • a voice coil motor including
  • the stator includes a base, a magnet and an end cover; the magnet is engaged with the end cover, the base is provided with a cavity, and the magnet and the end cover are built in the cavity;
  • a rotor comprising a skeleton, a coil and a push rod, wherein the skeleton is provided with a connecting hole, a part of the push rod is located in the connecting hole, and abuts against the end cover; the coil is wound around the skeleton; The skeleton is sleeved on the end cap;
  • An upper cover, the rotor is built in the upper cover, and the upper cover is fastened to the base.
  • the stator further includes a fastener, and the mounting base, the magnet and the end cover are respectively provided with mounting through holes, and the fasteners are sequentially connected to the end through the mounting through hole firmware Cover, magnet and base.
  • the stator further includes a first bearing and an inlay block
  • the inner block is provided with a first through hole, and a part of the first bearing is engaged with an inner wall of the first through hole;
  • the first bearing is provided with a second through hole, and the push rod is engaged with the fastener through the second through hole.
  • the end cover is provided with a groove, and the groove and the through hole are penetrated;
  • the fastener is located in the mounting through hole, and the embedded block is located in the groove and abuts the fastener.
  • the push rod includes an integral connecting rod and an abutting block; the connecting rod is disposed perpendicular to the abutting block.
  • the skeleton comprises a unitary skeleton body and a winding portion, and the coil is located at the winding portion;
  • the skeleton body has a triangular claw shape, and the abutting block abuts the skeleton body.
  • the rotor further includes a lead plate sleeved on the connecting rod and sandwiched between the abutting block and the skeleton body.
  • the voice coil motor further includes a second bearing; the upper cover is provided with a receiving groove, the push rod passes through the receiving groove, and the second bearing is sleeved at The push rod is engaged with the inner wall of the receiving groove.
  • the voice coil motor further includes an external board, and an outer hole is formed in a sidewall of the upper cover, the outer board is engaged with an inner wall of the outer hole, and the lead plate Electrical connection.
  • the base is provided with a cavity, the magnet is built in the cavity, and the magnet and the base are seamlessly sleeved, and no magnetic leakage occurs, so that the utilization of the magnetic field is also maximized.
  • the stator adopts an integrated design, which is compact, simple, easy to install and has good integration effect.
  • Figure 1 is an exploded view of the structure of the voice coil motor
  • Figure 2 is a sectional view showing the assembly of the voice coil motor
  • Figure 3 is an exploded view of the assembly section of the voice coil motor.
  • a voice coil motor is a device that converts electrical energy into mechanical energy and achieves linear and limited swing angle motion. It uses the interaction of magnetic poles in a magnetic field generated by an eternal magnetic field or a coiled conductor to produce a regular motion.
  • FIG. 1 is a structural exploded view of a voice coil motor including a stator 100 including a base 110, a magnet 120, and an end cover 130.
  • the magnet 120 is engaged with the end cover 130
  • the base 110 is provided with a cavity 111
  • the magnet 120 and the end cover 130 are built in the cavity 111
  • the rotor 200 the rotor 200
  • the bobbin 210 includes a bobbin 210 (not shown) and a push rod 220.
  • the bobbin 210 is provided with a connecting hole 211.
  • the part of the push rod 220 is located in the connecting hole 211 and abuts the end cover 130.
  • the coil (not shown) surrounds the bobbin 210.
  • On the skeleton 210; the skeleton 210 is sleeved on the end cover 130; and the upper cover 300, the rotor 100 is built in the upper cover 300, and the upper cover 300 is fastened to the base 110.
  • the base 110 is provided with a cavity 111, and the magnet 120 is built in the cavity 111 to cooperate, and there is no gap between the magnet 120 and the base 110, and no magnetic leakage occurs, so that the magnetic field utilization rate is utilized. Also maximized.
  • the stator adopts an integrated design, which is compact, simple, easy to install and has good integration effect.
  • the stator 100 also includes a fastener 140.
  • a cross-sectional exploded view of the voice coil motor is provided with mounting through holes 121 in the base 110, the magnet 120 and the end cover 130.
  • the fastener 140 sequentially connects the end cap 130, the magnet 120, and the base 110 by mounting the through hole 121.
  • the fastener 140 is a compression screw, and in other embodiments, it may be a rivet or a bolt, but is not limited thereto.
  • the stator 100 also includes a first bearing 150 and an inlay block 160.
  • the inlay block 160 is provided with a first through hole 161.
  • a part of the first bearing 150 is engaged with the inner wall of the first through hole 161; the first bearing 150 is provided with a second through hole 151, and the push rod is
  • the 220 is engaged with the fastener 140 through the second through hole 151.
  • the end cover 130 is provided with a recess 131 through which the recess 131 and the mounting through hole 121 are inserted.
  • the fastener 140 is located in the mounting through hole 121.
  • the insert block 160 is located in the recess 131 and abuts the fastener 140.
  • the push rod 220 includes an integral connecting rod 221 and an abutting block 223; the connecting rod 221 is disposed perpendicular to the abutting block 223.
  • the skeleton 210 includes an integrated skeleton body 213 and a winding portion 215. A coil (not shown) is located at the winding portion 215.
  • the skeleton body 213 has a triangular claw shape, and the abutting block 222 abuts against the skeleton body 211.
  • the skeleton body 213 is designed as a triangular claw shape. Since the skeleton body 213 is designed in a triangular claw shape, the top end thereof is formed into a sharp corner, so that the skeleton body 213 and the push rod 220 have a self-adjusting function. At the same time, the winding wall of the winding portion 215 is processed into a thin wall as much as possible, so that the quality of the entire skeleton 210 is lighter and the structural strength is more reliable, so that the weight of the voice coil motor can be obtained as much as possible. maximize.
  • the rotor 200 further includes a lead plate 230.
  • the lead plate 230 is sleeved on the connecting rod 221 and sandwiched between the abutting block 222 and the skeleton body 211.
  • the lead plate 230 is used to connect the coil to the finger load.
  • the voice coil motor further includes a second bearing 400.
  • a receiving slot 310 is defined in the upper cover 300, the push rod 220 passes through the receiving slot 310, and the second bearing 400 is sleeved in the push.
  • the rod 220 is engaged with the inner wall of the accommodating groove 400.
  • the lead plate 230 is pressed against the bobbin 210 by the push rod 220, and then the bobbin 210 around the coil is mounted into the first bearing 150 in the end cap 130.
  • the voice coil motor further includes an external board 500.
  • an external hole 320 is formed on the sidewall of the upper cover 300, and the outer board 500 is engaged with the inner wall of the external hole 320, and the lead wire.
  • the board 240 is electrically connected.
  • the external board 500 is fixed in the receiving slot 310 of the upper cover 300, the lead plate 230 and the external board 500 are connected by an enameled wire, the second bearing 400 is pressed into the upper cover 300, and then the end cover 130 and the upper cover are screwed. 300 fixed connection.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

一种音圈电机，包括定子（100），定子（100）包括底座（110）、磁铁（120）和端盖（130）；所述磁铁（120）与所述端盖（130）卡接，所述底座（110）开设有空腔（111），所述磁铁（120）、端盖（130）内置于所述空腔（111）中；转子（200），包括骨架（210）、线圈和推杆（220），所述骨架（210）开设有连接孔（211），部分所述推杆（220）位于所述连接孔（211）中，且与所述端盖（130）抵接；所述线圈环绕在所述骨架（210）上；所述骨架（210）套接在所述端盖（130）上；以及上盖（300），所述转子（200）内置于所述上盖（300）中，且所述上盖（300）与所述底座（110）扣合连接。在上述音圈电机中，其底座（110）开设有空腔（111），磁铁（120）内置于空腔（111）中，磁铁（120）与底座（110）无缝隙配合套接，不会产生漏磁的现象，使磁场的利用率也达到最大化。同时，定子（100）采用一体化的设计，使音圈电机的结构紧凑、简单，易于安装，集成效果好。

Description

音圈电机
【技术领域】
本发明涉及电机技术领域，特别是涉及音圈电机。
【背景技术】
音圈电机(voice coil motor，VCM) ，VCM 是一种电机，目前音圈电机一般是由铁磁圆柱、永久磁铁、线圈支撑、管状线圈等结构组成。其工作原理是：线圈通电后产生电磁力，带动负载作直线运动，改变电流的强弱和极性，即可改变电磁力的大小和方向。但是，传统音圈电机中的永久磁铁的体积受到很大的限制，严重影响到磁场强度所导致的电机力量。这种结构也会造成相当程度的漏磁现象，使磁场的利用率下降，同时线圈支撑的设计普遍比较单一、笨重，这样也会使电机力量大打折扣。
【发明内容】
基于此，有必要针对定子存在的漏磁现象，使磁场的利用率下降的问题，提供一种音圈电机。
一种音圈电机，包括
定子，包括底座、磁铁和端盖；所述磁铁与所述端盖卡接，所述底座开设有空腔，所述磁铁、端盖内置于所述空腔中；
转子，包括骨架、线圈和推杆，所述骨架开设有连接孔，部分所述推杆位于所述连接孔中，且与所述端盖抵接；所述线圈环绕在所述骨架上；所述骨架套接在所述端盖上；以及
上盖，所述转子内置于所述上盖中，且所述上盖与所述底座扣合连接。
在其中一个实施例中，所述定子还包括紧固件，在所述底座、磁铁和端盖上均开设有安装通孔，所述紧固件通过所述安装通孔固件依次连接所述端盖、磁铁和底座。
在其中一个实施例中，所述定子还包括第一轴承和内嵌块；
所述内嵌块开设有第一通孔，部分所述第一轴承与所述第一通孔的内壁卡接；
所述第一轴承开设有第二通孔，所述推杆穿过所述第二通孔与所述紧固件卡接。
在其中一个实施例中，所述端盖开设有凹槽，所述凹槽和安装通孔贯通；
所述紧固件位于所述安装通孔内，所述内嵌块位于所述凹槽中，并与所述紧固件抵接。
在其中一个实施例中，所述推杆包括一体式的连接杆和抵接块；所述连接杆与所述抵接块垂直设置。
在其中一个实施例中，所述骨架包括一体式的骨架本体和绕线部，所述线圈位于所述绕线部；
所述骨架本体呈三角爪形，所述抵接块与所述骨架本体抵接。
在其中一个实施例中，所述转子还包括引线板，所述引线板套接在所述连接杆上，夹持在所述抵接块与骨架本体之间。
在其中一个实施例中，所述音圈电机还包括第二轴承；所述上盖上开设有容置槽，所述推杆穿过所述容置槽，且所述第二轴承套接在所述推杆上且与所述容置槽的内壁卡接。
在其中一个实施例中，所述音圈电机还包括外接板，在所述上盖的侧壁上开设有外接孔，所述外接板与所述外接孔的内壁卡接，与所述引线板电连接。
在上述音圈电机中，其底座开设有空腔，磁铁内置于空腔中，磁铁与底座无缝隙配合套接，不会产生漏磁的现象，使磁场的利用率也达到最大化。同时，定子采用一体化的设计，是音圈电机的结构紧凑、简单，易于安装，集成效果好。
【附图说明】
图1为音圈电机的结构爆炸图；
图2为音圈电机的装配剖面图；
图3为音圈电机的装配剖面爆炸图。
【具体实施方式】
为了便于理解本发明，下面将参照相关附图对本发明进行更全面的描述。附图中给出了本发明的较佳实施例。但是，本发明可以以许多不同的形式来实现，并不限于本文所描述的实施例。相反地，提供这些实施例的目的是使对本发明的公开内容的理解更加透彻全面。
除非另有定义，本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在限制本发明。本文所使用的术语“和／或”包括一个或多个相关的所列项目的任意的和所有的组合。
音圈电机，是一种将电能转化为机械能的装置，并实现直线型及有限摆角的运动。它利用来自永恒磁场或通电线圈导体产生的磁场中磁极的相互作用产生有规律的运动。
如图1所示的为音圈电机的结构爆炸图，该包括音圈电机包括定子100，定子100包括底座110、磁铁120和端盖130。如图2所示的为音圈电机的装配剖面图，磁铁120与端盖130卡接，底座110开设有空腔111，磁铁120、端盖130内置于空腔111中；转子200，转子200包括骨架210、线圈（图中未示）和推杆220，骨架210开设有连接孔211，部分推杆220位于连接孔211中，且与端盖130抵接；线圈（图中未示）环绕在骨架210上；骨架210套接在端盖130上；以及上盖300，转子100内置于上盖300中，且上盖300与底座110扣合连接。
进一步地可以理解为：当线圈（图中未示）通电时，其通电线圈（图中未示）（导体）穿过磁场就会产生一个垂直于磁场线的力，这个力的大小取决于通过磁场的线圈（图中未示）（导体）的长度、磁场及电流的强度。音圈电机将实际的电流转化为直线推力，其推力的大小是同实际通过的电流的大小成比例。在本实施例中，其底座110开设有空腔111，磁铁120内置于空腔111中，使其配合，磁铁120与底座110中没有缝隙，不会产生漏磁的现象，使磁场的利用率也达到最大化。同时，定子采用一体化的设计，是音圈电机的结构紧凑、简单，易于安装，集成效果好。
在本市实施例中，定子100还包括紧固件140。如图3所示的为音圈电机的剖面爆炸图，在底座110、磁铁120和端盖130上均开设有安装通孔121。参考图3，紧固件140通过安装通孔121固件依次连接端盖130、磁铁120和底座110。在本实施中，紧固件140为压紧螺钉，在其他实施例中，还可以为铆钉、螺栓，但不限于此。
定子100还包括第一轴承150和内嵌块160。参考图3，内嵌块160开设有第一通孔161，参考图2，部分第一轴承150与第一通孔161的内壁卡接；第一轴承150开设有第二通孔151，推杆220穿过第二通孔151与紧固件140卡接。端盖130开设有凹槽131，凹槽131和安装通孔121贯通；紧固件140位于安装通孔121内，内嵌块160位于凹槽131中，并与紧固件140抵接。
在本实施例中，参考图3，推杆220包括一体式的连接杆221和抵接块223；连接杆221与抵接块223垂直设置。骨架210包括一体式的骨架本体213和绕线部215，线圈（图中未示）位于绕线部215；骨架本体213呈三角爪形，抵接块222与骨架本体211抵接。
在本实施例中，将骨架本体213设计成三角爪形，由于骨架本体213设计成三角爪形，其顶端做成尖角，这样骨架本体213与推杆220具有自调整的功能。同时将绕线部215的绕线壁尽可能的加工成薄壁，这样使得整个骨架210的质量更轻、结构强度也更可靠，使其尽可能的轻量化，可以让音圈电机的力量得到最大化。
在本实施例中，转子200还包括引线板230，参考图2，引线板230套接在连接杆221上，夹持在抵接块222与骨架本体211之间。引线板230用于将线圈引接指负载。
同时，音圈电机还包括第二轴承400；参考图2和图3，在上盖300中开设有容置槽310，推杆220穿过容置槽310，且第二轴承400套接在推杆220上且与容置槽400的内壁卡接。用推杆220把引线板230压紧在骨架210上面，接着将绕好线圈的骨架210安装到端盖130中的第一轴承150中。
在本实施例中，音圈电机还包括外接板500，参考图2和图3，在上盖300的侧壁上开设有外接孔320，外接板500与外接孔320的内壁卡接，与引线板240电连接。将外接板500固定在上盖300的容置槽310中，用漆包线把引线板230和外接板500连接起来，第二轴承400压入到上盖300，然后用螺钉将端盖130和上盖300固定连接。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。

Claims (9)

  1. 一种音圈电机，其特征在于，包括
    定子，包括底座、磁铁和端盖；所述磁铁与所述端盖卡接，所述底座开设有空腔，所述磁铁、端盖内置于所述空腔中；
    转子，包括骨架、线圈和推杆，所述骨架开设有连接孔，部分所述推杆位于所述连接孔中，且与所述端盖抵接；所述线圈环绕在所述骨架上；所述骨架套接在所述端盖上；以及
    上盖，所述转子内置于所述上盖中，且所述上盖与所述底座扣合连接。
  2. 根据权利要求1所述的音圈电机，其特征在于，所述定子还包括紧固件，在所述底座、磁铁和端盖上均开设有安装通孔，所述紧固件通过所述安装通孔固件依次连接所述端盖、磁铁和底座。
  3. 根据权利要求1所述的音圈电机，其特征在于，所述定子还包括第一轴承和内嵌块；
    所述内嵌块开设有第一通孔，部分所述第一轴承与所述第一通孔的内壁卡接；
    所述第一轴承开设有第二通孔，所述推杆穿过所述第二通孔与所述紧固件卡接。
  4. 根据权利要求3所述的音圈电机，其特征在于，所述端盖开设有凹槽，所述凹槽和安装通孔贯通；
    所述紧固件位于所述安装通孔内，所述内嵌块位于所述凹槽中，并与所述紧固件抵接。
  5. 根据权利要求1所述的音圈电机，其特征在于，所述推杆包括一体式的连接杆和抵接块；所述连接杆与所述抵接块垂直设置。
  6. 根据权利要求5所述的音圈电机，其特征在于，所述骨架包括一体式的骨架本体和绕线部，所述线圈位于所述绕线部；
    所述骨架本体呈三角爪形，所述抵接块与所述骨架本体抵接。
  7. 根据权利要求6所述的音圈电机，其特征在于，所述转子还包括引线板，所述引线板套接在所述连接杆上，夹持在所述抵接块与骨架本体之间。
  8. 根据权利要求1所述的音圈电机，其特征在于，所述音圈电机还包括第二轴承；所述上盖上开设有容置槽，所述推杆穿过所述容置槽，且所述第二轴承套接在所述推杆上且与所述容置槽的内壁卡接。
  9. 根据权利要求7所述的音圈电机，其特征在于，所述音圈电机还包括外接板，在所述上盖的侧壁上开设有外接孔，所述外接板与所述外接孔的内壁卡接，与所述引线板电连接。
PCT/CN2016/088491 2016-02-01 2016-07-04 音圈电机 WO2017133181A1 (zh)

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