WO2013104162A1 - 一种透镜驱动装置 - Google Patents

一种透镜驱动装置 Download PDF

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Publication number
WO2013104162A1
WO2013104162A1 PCT/CN2012/074942 CN2012074942W WO2013104162A1 WO 2013104162 A1 WO2013104162 A1 WO 2013104162A1 CN 2012074942 W CN2012074942 W CN 2012074942W WO 2013104162 A1 WO2013104162 A1 WO 2013104162A1
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WO
WIPO (PCT)
Prior art keywords
coil
elastic piece
lens carrier
lens
driving device
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PCT/CN2012/074942
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English (en)
French (fr)
Inventor
金绍平
方绍彬
夏太红
金士雷
黄晓敏
颜石磊
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金龙机电股份有限公司
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Application filed by 金龙机电股份有限公司 filed Critical 金龙机电股份有限公司
Publication of WO2013104162A1 publication Critical patent/WO2013104162A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G02B7/08—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted to co-operate with a remote control mechanism
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
    • H02K41/02—Linear motors; Sectional motors
    • H02K41/035—DC motors; Unipolar motors
    • H02K41/0352—Unipolar motors
    • H02K41/0354—Lorentz force motors, e.g. voice coil motors
    • H02K41/0356—Lorentz force motors, e.g. voice coil motors moving along a straight path

Definitions

  • the present invention relates to a lens driving device, and more particularly to a lens driving device that is applied to a camera, a video camera, or a mobile phone having a photographing function to drive the lens to move to adjust the focal length.
  • the conventional camera has a gear unit for adjusting the focal length, and generally comprises a stepping motor, a gear, a cam, a connecting rod and the like.
  • a gear unit for adjusting the focal length
  • Chinese Patent Publication No. CN2938165Y discloses a lens structure with a stable autofocus function, including a housing, a motor, and a a gear, a second gear, a lens module and an elastic component, the motor being disposed in the housing, the first gear setting
  • the housing is fixed to the shaft of the motor
  • the second gear is disposed in the housing and vertically meshes with the first gear
  • the upper surface of the second gear has a spiral bevel.
  • the lens module is disposed in the housing, and the lens module has a bump that contacts the spiral bevel of the second gear.
  • the motor, two gears, the housing, the spiral bevel and the bump and the lens module have many components, which make the camera larger in size and complicated in transmission, so it is difficult to adapt to the trend of miniatur
  • a driving device that uses a magnetic field to generate power is used more and more widely.
  • a lens driving device including a square having a circular hole mounted on a base. And a yoke ring which is a contour of the outer casing of the lens driving device, wherein the yoke ring is provided with a magnet and a coil, and a lens with a lens carrier is disposed in the circular hole of the yoke ring, and the lens carrier is disposed in front and rear There are front side springs with front side gaskets and rear side springs with rear side gaskets.
  • the principle of this technical solution is to place the coil in the magnetic field generated by the magnet, energize the coil to be driven by the electromagnetic force to drive the lens carrier fixed thereto to drive the lens to a predetermined position. Since the device does not require a transmission tool such as a motor, a gear, a cam, or a screw, it is small in size and simple in manufacturing and assembly processes. However, in the technical solution disclosed in the above patent document, the magnetic lines of force generated by the magnet are relatively dispersed, and the magnetic induction intensity in the coil is small, so that the electromagnetic force for driving the carrier with the lens is also small.
  • the magnetic circuit of the lens driving device is from one pole of the magnet to the ring mouth, and then returns to the other pole of the magnet along the ring mouth. That is, the magnetic circuit is completed by the ring mouth, which requires a certain gap between the magnet and the coil and between the coil and the carrier, which is disadvantageous for designing the structure of the driving device to be more compact, and is not conducive to the coil and the carrier. Fixed between.
  • the lens support in the optical axis direction it is easily shaken by the radial force, resulting in blurring of the image captured by the lens.
  • the object of the present invention is to provide a lens driving device which is relatively reasonable in structure and relatively stable in performance.
  • a lens driving device includes a housing, and a lens carrier, a magnet assembly, a coil, a spring elastic piece and a lower elastic piece disposed in the housing; the lens carrier is disposed between the upper elastic piece and the lower elastic piece, and the magnet assembly is disposed At the periphery of the lens carrier; the coil is disposed between the magnet assembly and the lens carrier.
  • the above solution further includes a top elastic piece bracket and a lower insulating spacer;
  • the housing includes an upper cover made of a magnetic conductive material and a base made of an insulating material; and the upper elastic piece bracket is disposed on the upper elastic piece and the top wall of the upper cover Between the lower insulating spacers is disposed between the lower elastic piece and the base.
  • a lens driving device includes a housing, and a lens carrier, a magnet assembly, a coil, a spring elastic piece and a lower elastic piece disposed in the housing; the lens carrier is disposed between the upper elastic piece and the lower elastic piece, and the magnet assembly is disposed At the periphery of the lens carrier; the coil is disposed between the magnet assembly and the lens carrier.
  • the above solution further includes a top elastic piece bracket and a lower insulating spacer;
  • the housing includes an upper cover made of a magnetic conductive material and a base made of an insulating material; and the upper elastic piece bracket is disposed on the upper elastic piece and the top wall of the upper cover Between the lower insulating spacers is disposed between the lower elastic piece and the base.
  • the first solution of the magnet assembly comprises: a plurality of magnets located in the same plane, each magnet is arranged in a ring shape, and a gap is left between the adjacent two magnets, and each magnet is close to the inner end of the lens carrier. Is a magnetic pole, another magnetic pole in a radial direction away from the lens carrier;
  • the second scheme of the magnet assembly comprises: a plurality of magnets arranged in a ring shape in a double layer, and a plurality of magnets in the same layer are arranged in a ring shape, and between two adjacent magnets in the same layer a gap is left; an upper end of each magnet in the upper magnet is an S pole, and a lower end is an N pole; an upper end of each of the lower magnets is an N pole, and a lower end is an S pole; the coils include an upper coil and a lower coil, the upper coil The coil is placed directly above the lower coil and there is a gap between the upper coil and the lower coil.
  • the outer wall of the lens carrier is provided with a positioning boss protruding in the radial direction, and the bottom end of the lower coil is disposed on the positioning boss.
  • the inner wall of the coil is fixed on the outer wall of the lens carrier by glue bonding, and the outer wall of the lens carrier is provided with a plastic tank for accommodating excess glue.
  • the glue receiving groove is disposed on the inner wall of the coil.
  • the gap distance between the upper coil and the lower coil is the travel distance of the lens carrier lens carrier.
  • the upper elastic piece comprises four fixed areas at four corners, an inner ring area for fixing on the lens carrier, a plurality of elastic arm areas connecting the corresponding fixed area and the inner ring area, and two adjacent connecting arms.
  • the reinforcing plates of the fixed area, each reinforcing plate is perpendicular to the plane of the fixed area.
  • the upper elastic piece further includes a connection area for connecting two adjacent fixed areas, and the connection areas are located in the same plane as the fixed area.
  • the reinforcing plate is higher than the plane of the fixing area; the reinforcing plates are located between the outer peripheral edge of the upper elastic piece bracket and the side wall of the upper cover, or the reinforcing plates are located in the through holes of the upper elastic piece bracket. .
  • each of the reinforcing plates is located at a peripheral edge of each of the fixing regions, and a gap is left between the adjacent two reinforcing plates.
  • the fixing plate, the inner ring region and the elastic arm region of the reinforcing plate and the upper elastic piece are made of the same plate, and the reinforcing plate is made by bending the plate portion of the plate.
  • the structure of the invention is relatively reasonable and compact, and the magnetic flux ring in the conventional lens driving device is no longer needed, thereby avoiding the disadvantage that the lens carrier is eccentric due to the magnetic force of the magnetic conductive ring being too strong, which not only simplifies the manufacturing process but also effectively reduces the manufacturing. cost.
  • the upper elastic piece comprises a reinforcing plate connecting adjacent two fixed areas, and each reinforcing plate is perpendicular to a plane of the fixed area, and the reinforcing plate can effectively improve the strength of the upper elastic piece on the basis of not increasing the occupied area, so that the installation operation is performed. At the time, permanent deformation is less likely to occur, and the yield is effectively improved, thereby reducing the manufacturing cost to some extent.
  • the occupied area of the upper elastic piece can also be effectively reduced, thereby reducing the overall volume.
  • the outer wall of the lens carrier of the invention is provided with a plastic glue groove, and when the coil is bonded and fixed on the outer wall of the lens carrier, the excess glue can be accommodated, thereby effectively overcoming various drawbacks caused by overflow of the glue.
  • FIG. 1 is a schematic perspective view of a first embodiment of the present invention
  • FIG. 2 is a schematic perspective view of the voice coil motor shown in FIG. 1 when viewed from another angle;
  • Figure 3 is a cross-sectional view of the voice coil motor shown in Figure 1;
  • Figure 4 is an exploded view of the voice coil motor shown in Figure 1;
  • Figure 5 is a perspective view showing a three-dimensional structure of the upper elastic piece in the voice coil motor shown in Figure 1;
  • Figure 6 is a cross-sectional view showing a second embodiment of the present invention.
  • Figure 7 is a perspective view showing a three-dimensional structure of the magnet assembly shown in Figure 6;
  • Figure 8 is a perspective view showing a three-dimensional structure of the upper elastic piece in the third embodiment of the present invention.
  • FIG. 1 The drawings are labeled as: housing 1, upper cover 11, side wall 111, base 12, lens carrier 2, positioning boss 21, glue tank 22, magnet assembly 3, magnet 31, coil 4, upper coil 41, Lower coil 42, upper spring 5, fixed area 51, gap 511, Inner ring region 52, elastic arm region 53, reinforcing plate 54, notch 541, connecting portion 55, lower elastic piece 6, upper elastic piece holder 7, through hole 71, lower insulating spacer 8.
  • FIG. 1 1 is a schematic perspective view of a first structure of the present invention
  • FIG. 2 is a schematic perspective view of the voice coil motor shown in FIG. 1 when viewed from another angle
  • FIG. 3 is a schematic diagram of the voice coil motor shown in FIG. Sectional view
  • Figure 4 It is an exploded view of the voice coil motor shown in Fig. 1
  • Fig. 5 is a perspective structural view of the upper elastic piece in the voice coil motor shown in Fig. 1.
  • a lens driving device as shown in FIGS. 1 to 5, includes a housing 1, and a lens carrier 2, a magnet assembly 3, a coil 4, an upper elastic piece 5, a lower elastic piece 6, and an upper elastic piece holder 7 which are disposed in the housing 1. a lower insulating spacer 8; the lens carrier 2 is disposed between the upper elastic piece 5 and the lower elastic piece 6, the magnet assembly 3 is disposed at the outer periphery of the lens carrier 2; and the coil 4 is disposed between the magnet assembly 3 and the lens carrier 2 .
  • the housing 1 includes an upper cover 11 made of a magnetically permeable material and a base 12 made of an insulating material; the upper elastic piece bracket 7 is disposed between the upper elastic piece 5 and the top wall of the upper cover 11, the lower insulating spacer 8 is disposed between the lower elastic piece 6 and the base 12.
  • the magnet assembly 3 includes a plurality of magnets 31 located in the same plane, each of the magnets 31 is arranged in a ring shape, and a gap is left between the adjacent two magnets 31, and each of the magnets 31 is adjacent to the inner side of the lens carrier 2. Is a magnetic pole, which is another magnetic pole in a radial direction away from the lens carrier 2;
  • the outer wall of the lens carrier 2 is provided with a positioning boss 21 which protrudes in the radial direction, and the bottom end of the coil is disposed on the positioning boss 21.
  • the inner wall of the coil 4 is fixed on the outer wall of the lens carrier 2 by glue bonding, and the outer wall of the lens carrier 2 is provided with a plastic tank 22 for accommodating excess glue.
  • the adhesive tank 22 is disposed opposite the inner wall of the coil 4.
  • the upper elastic piece 5 includes four fixing regions 51 at four corners, an inner ring region 52 for fixing to the lens carrier 2, a plurality of elastic arm regions 53 connecting the corresponding fixing regions 51 and the inner ring region 52, and a connection.
  • the reinforcing plates 54 of the two adjacent fixing regions 51 are perpendicular to the plane of the fixing region 51.
  • the reinforcing plate 54 is higher than the plane of the fixing area 51; the reinforcing plates 54 are located between the outer peripheral edge of the upper elastic piece bracket 7 and the side wall 111 of the upper cover 11, or the reinforcing plates 54 are located on the upper elastic piece bracket 7 In the through hole 71.
  • Each of the reinforcing plates 54 is located at the outer peripheral edge of each of the fixing regions 51, and a gap 541 is left between the adjacent two reinforcing plates 54.
  • the upper elastic piece 5 further includes a connection area 55 for connecting adjacent two fixed areas 51, and each of the connection areas 55 is located in the same plane as the fixed area 51.
  • the reinforcing plate 54 and the fixing portion 51, the inner ring portion 52 and the elastic arm portion 53 of the upper elastic piece 5 are made of the same plate material, and the reinforcing plate 54 is made by bending the plate portion.
  • FIG. 1 1 is a schematic perspective view of a first structure of the present invention
  • FIG. 2 is a schematic perspective view of the voice coil motor shown in FIG. 1 when viewed from another angle
  • FIG. 3 is a schematic diagram of the voice coil motor shown in FIG. Sectional view
  • Figure 4 It is an exploded view of the voice coil motor shown in Fig. 1
  • Fig. 5 is a perspective structural view of the upper elastic piece in the voice coil motor shown in Fig. 1.
  • a lens driving device as shown in FIGS. 1 to 5, includes a housing 1, and a lens carrier 2, a magnet assembly 3, a coil 4, an upper elastic piece 5, a lower elastic piece 6, and an upper elastic piece holder 7 which are disposed in the housing 1. a lower insulating spacer 8; the lens carrier 2 is disposed between the upper elastic piece 5 and the lower elastic piece 6, the magnet assembly 3 is disposed at the outer periphery of the lens carrier 2; and the coil 4 is disposed between the magnet assembly 3 and the lens carrier 2 .
  • the housing 1 includes an upper cover 11 made of a magnetically permeable material and a base 12 made of an insulating material; the upper elastic piece bracket 7 is disposed between the upper elastic piece 5 and the top wall of the upper cover 11, the lower insulating spacer 8 is disposed between the lower elastic piece 6 and the base 12.
  • the magnet assembly 3 includes a plurality of magnets 31 located in the same plane, each of the magnets 31 is arranged in a ring shape, and a gap is left between the adjacent two magnets 31, and each of the magnets 31 is adjacent to the inner side of the lens carrier 2. Is a magnetic pole, which is another magnetic pole in a radial direction away from the lens carrier 2;
  • the outer wall of the lens carrier 2 is provided with a positioning boss 21 which protrudes in the radial direction, and the bottom end of the coil is disposed on the positioning boss 21.
  • the inner wall of the coil 4 is fixed on the outer wall of the lens carrier 2 by glue bonding, and the outer wall of the lens carrier 2 is provided with a plastic tank 22 for accommodating excess glue.
  • the adhesive tank 22 is disposed opposite the inner wall of the coil 4.
  • the upper elastic piece 5 includes four fixing regions 51 at four corners, an inner ring region 52 for fixing to the lens carrier 2, a plurality of elastic arm regions 53 connecting the corresponding fixing regions 51 and the inner ring region 52, and a connection.
  • the reinforcing plates 54 of the two adjacent fixing regions 51 are perpendicular to the plane of the fixing region 51.
  • the reinforcing plate 54 is higher than the plane of the fixing area 51; the reinforcing plates 54 are located between the outer peripheral edge of the upper elastic piece bracket 7 and the side wall 111 of the upper cover 11, or the reinforcing plates 54 are located on the upper elastic piece bracket 7 In the through hole 71.
  • Each of the reinforcing plates 54 is located at the outer peripheral edge of each of the fixing regions 51, and a gap 541 is left between the adjacent two reinforcing plates 54.
  • the upper elastic piece 5 further includes a connection area 55 for connecting adjacent two fixed areas 51, and each of the connection areas 55 is located in the same plane as the fixed area 51.
  • the reinforcing plate 54 and the fixing portion 51, the inner ring portion 52 and the elastic arm portion 53 of the upper elastic piece 5 are made of the same plate material, and the reinforcing plate 54 is made by bending the plate portion.
  • FIG. 6 and FIG. 7 show a second embodiment of the present invention, wherein FIG. 6 is a cross-sectional view showing a second structure of the present invention; It is a schematic view of a three-dimensional structure of the magnet assembly shown in Fig. 6.
  • the magnet assembly 3 includes a plurality of magnets 31 arranged in a ring shape in a double layer, and a plurality of magnets 31 in the same layer are arranged in a ring shape, and a gap is left between two adjacent magnets 31 in the same layer;
  • the upper end of each magnet 31 in the magnet 31 is an S pole, and the lower end is an N pole;
  • the upper end of each magnet 31 has an N pole and a lower end is an S pole;
  • the coil 4 includes an upper coil and a lower coil, and the upper coil is disposed under The coil is directly above and there is a gap between the upper coil and the lower coil.
  • the gap distance between the upper coil 41 and the lower coil 42 is the stroke distance of the lens driving device lens carrier 2.
  • the outer wall of the lens carrier 2 is provided with a positioning boss 21 which protrudes in the radial direction, and the bottom end of the lower coil is disposed on the positioning boss 21.
  • Fig. 8 is a perspective view showing a three-dimensional structure of the upper elastic piece in the third structure of the present invention, showing a third embodiment of the present invention.
  • This embodiment is basically the same as Embodiment 1, except that: A connection region 55 for connecting the adjacent two fixing regions 51 is no longer provided on the upper elastic piece 5, and a gap 511 for blocking the adjacent two fixing regions 51 is provided between the respective fixing regions 51. Further, the specific shape of the upper elastic piece 5 is also different from that of the first embodiment.
  • the structure of the invention is relatively reasonable and compact, and the magnetic flux ring in the conventional lens driving device is no longer needed, thereby avoiding the disadvantage that the lens carrier is eccentric due to the magnetic force of the magnetic conductive ring being too strong, which not only simplifies the manufacturing process but also effectively reduces the manufacturing. cost.
  • the upper elastic piece comprises a reinforcing plate connecting adjacent two fixed areas, and each reinforcing plate is perpendicular to a plane of the fixed area, and the reinforcing plate can effectively improve the strength of the upper elastic piece on the basis of not increasing the occupied area, so that the installation operation is performed. At the time, permanent deformation is less likely to occur, and the yield is effectively improved, thereby reducing the manufacturing cost to some extent.
  • the occupied area of the upper elastic piece can also be effectively reduced, thereby reducing the overall volume.
  • the outer wall of the lens carrier is provided with a plastic glue groove.
  • the excess glue can be accommodated, thereby effectively overcoming various drawbacks caused by overflow of the glue.

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  • Engineering & Computer Science (AREA)
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Abstract

一种透镜驱动装置，包括壳体（1）、以及设置在壳体中的透镜载体（2）、磁石组件（3）、线圏（4）、上弹片（5）和下弹片（6）。透镜载体（2）设置在上弹片（5）和下弹片（6）之间，磁石组件（3）设置在透镜载体（2）外周，线圏（4）设置在磁石组件（3）与透镜载体（2）之间。该透镜驱动装置结构合理紧凑，无需传统透镜驱动装置中的导磁环，从而避免了因导磁环磁力过强而导致的透镜载体偏心，简化了制造工艺，有效降低了制造成本。

Description

一种透镜驱动装置 技术领域
本发明涉及一种透镜驱动装置，具体来说是一种应用于照相机、摄像机或具有拍照功能的手机等设备上以驱动镜头移动从而调节焦距的镜头驱动装置。
背景技术
传统的照相机其调节焦距的驱动装置通常包括步进电机、齿轮、凸轮及连杆等构件组成，如中国专利文献CN2938165Y公开了一种具有稳定自动对焦功能的镜头结构，包括壳体、马达、第一齿轮、第二齿轮、镜头模块及弹性组件，所述马达设置于该壳体内，所述第一齿轮设置 该壳体内并固定于该马达的轴心上，所述第二齿轮设置于该壳体内并与该第一齿轮垂直地啮合在一起，所述第二齿轮的上表面具有一螺旋状斜面，所述镜头模块设置于该壳体内，并且镜头模块具有一与第二齿轮的螺旋状斜面接触的凸块。其中涉及电机、两个齿轮、壳体、螺旋斜面和凸块及镜头模块，部件众多，使得照相机的尺寸较大，传动复杂，因此很难适应照相机小型化的趋势。
 技术问题
为适应相机小型化的需要，一种采用利用磁场产生动力的驱动装置使用越来越广泛，如中国专利文献CN201035200Y公开了一种透镜驱动装置，包括一安装在底座上的具有带圆孔的方形轮廓并兼为透镜驱动装置的外部筐体的磁轭环，该磁轭环内安置有磁石与线圈，磁轭环的圆孔中设置有带一透镜载体的透镜，该透镜载体的前后各设置有带前侧垫片的前侧弹簧与带后侧垫片的后侧弹簧。这种技术方案的原理是将线圈置于磁石产生的磁场中，给线圈通电使其受到电磁力的驱动从而带动与其固定在一起的透镜载体移动，将透镜驱动到预定的位置。由于这种装置无需电机、齿轮、凸轮、螺杆等传动工具因此体积小，且制作与装配工艺简单。但上述专利文献所披露的技术方案，磁石产生的磁力线较为分散，线圈中的磁感应强度较小，使得驱动带有镜头的载体的电磁力也较小。要使其达到驱动带有镜头的载体的目的，需要增大线圈的长度或加大线圈中的电流，而增加线圈的长度就必然会加大驱动装置的尺寸。因此，目前一般生产厂家都是采用加大线圈中的电流的方法，这就造成了能量的浪费。并且透镜驱动装置的磁路是经磁石的一极到环口，再沿环口回到磁石另一极。即所述磁路依靠环口来完成，这需要在磁石与线圈之间、线圈与载体之间保留一定的空隙，这不利于将驱动装置的结构设计得更加紧凑，也不利于线圈和载体之间的固定。另外，在透镜支撑体沿光轴方向移动的过程中，易受到径向的力而摇晃，导致透镜拍摄到的图像模糊。
 技术解决方案
本发明的目的是提供一种结构较为合理、性能较为稳定可靠的镜头驱动装置。
实现本发明目的的技术方案是： 一种透镜驱动装置，包括壳体，以及设置在壳体中的透镜载体、磁石组件、线圈、上弹片和下弹片；所述透镜载体设置在上弹片和下弹片之间，所述磁石组件设置在透镜载体外周；所述线圈设置在磁石组件与透镜载体之间。
上述方案中，还包括上弹片支架和下绝缘垫片；所述壳体包括导磁材料制成的上盖和绝缘材料制成的底座；所述上弹片支架设置在上弹片与上盖顶壁之间，所述下绝缘垫片设置在下弹片与底座之间。
实现本发明目的的技术方案是： 一种透镜驱动装置，包括壳体，以及设置在壳体中的透镜载体、磁石组件、线圈、上弹片和下弹片；所述透镜载体设置在上弹片和下弹片之间，所述磁石组件设置在透镜载体外周；所述线圈设置在磁石组件与透镜载体之间。
上述方案中，还包括上弹片支架和下绝缘垫片；所述壳体包括导磁材料制成的上盖和绝缘材料制成的底座；所述上弹片支架设置在上弹片与上盖顶壁之间，所述下绝缘垫片设置在下弹片与底座之间。
上述方案中，所述磁石组件的第一种方案是：包括多个位于同一平面的磁石，各磁石排成环状，相邻的两磁石之间留有间隙，各磁石接近透镜载体的内侧端是一种磁极，在远离透镜载体的径向方向上是另一磁极；
上述方案中，所述磁石组件的第二种方案是：包括上下双层呈环状排列的多个磁石，同层中的多个磁石排成环状，同层中相邻的两磁石之间留有间隙；所述上层磁石中各磁石的上端是S极，下端是N极；下层各磁石的上端是N极，下端是S极；所述各线圈包括上线圈和下线圈，所述上线圈设置在下线圈正上方，且上线圈与下线圈之间留有间隙。
上述方案中，所述透镜载体外壁上设有沿径向凸出的定位凸台，所述下线圈的底端设置在定位凸台上。
上述方案中，所述线圈的内壁通过胶水粘结固定在透镜载体外壁上，所述透镜载体的外壁上设有用于容置多余胶水的容胶槽。
上述方案中，所述容胶槽正对线圈内壁设置。
上述方案中，所述上线圈与下线圈之间的间隙距离为该透镜驱动装置透镜载体的行程距离。
上述方案中，所述上弹片包括位于四角处的四个固定区、用于固定在透镜载体上的内环区、连接相应固定区和内环区的多个弹性臂区、以及连接相邻两个固定区的增强板，各增强板垂直于固定区所在平面。
上述方案中，所述上弹片还包括用于连接相邻两个固定区的连接区，所述各连接区与固定区位于同一平面。
上述方案中，所述增强板高出固定区所在平面；所述各增强板位于上弹片支架的外周边缘与上盖的侧壁之间，或者所述各增强板位于上弹片支架的透孔中。
上述方案中，所述各增强板位于各固定区的外周边缘处，相邻的两个增强板之间留有缺口。
上述方案中，所述增强板与上弹片的固定区、内环区以及弹性臂区是采用同一板材制成，所述增强板是通过折弯该板材部分板体制成。
上述方案中，所述各固定区之间设有用于将相邻两个固定区隔断的间隙。
 有益效果
本发明结构较为合理紧凑，不再需要传统透镜驱动装置中的导磁环，从而避免发生因导磁环磁力过强而导致的透镜载体偏心的弊病，不仅简化了制造工艺，还有效降低了制造成本。
本发明中的 上弹片包括连接相邻两个固定区的增强板，各增强板垂直于固定区所在平面，这种增强板可以在不提高占用面积的基础上，有效提高上弹片的强度，使其在安装操作时，不易发生永久形变，有效提高了成品率，从而在一定程度上降低了制造成本。尤其是通过采用增强板结构方式，还可以有效减小上弹片的占用面积，从而减小整体体积。
本发明中的透镜载体外壁上设有容胶槽，在把线圈粘结固定在透镜载体外壁上时，可以收容多余的胶水，有效克服因胶水过多而溢出带来的种种弊端。
 附图说明
图 1 为本发明第一实施例的一种立体结构示意图；
图 2 为图 1 所示音圈马达从另一角度观察时的一种立体结构示意图；
图 3 为图 1 所示音圈马达的一种剖视图；
图 4 为图 1 所示音圈马达的一种爆炸图；
图 5 为图 1 所示音圈马达中上弹片的一种立体结构示意图；
图 6 为本发明第二实施例的一种剖视图；
图 7 为图 6 所示磁石组件的一种立体结构示意图；
图 8 为本发明第三实施例中上弹片的一种立体结构示意图。
附图所示标记为：壳体1，上盖11，侧壁111，底座12，透镜载体2，定位凸台21，容胶槽22，磁石组件3，磁石31，线圈4，上线圈41，下线圈42，上弹片5，固定区51，间隙511， 内环区52，弹性臂区53，增强板54，缺口541，连接区55，下弹片6，上弹片支架7，透孔71，下绝缘垫片8。
 本发明的最佳实施方式
图 1 至图 5 显示了本发明的第一种具体实施方式，其中图 1 为本发明第一种结构的一种立体结构示意图；图 2 为图 1 所示音圈马达从另一角度观察时的一种立体结构示意图；图 3 为图 1 所示音圈马达的一种剖视图；图 4 为图 1 所示音圈马达的一种爆炸图；图 5 为图 1 所示音圈马达中上弹片的一种立体结构示意图。
本实施例是 一种透镜驱动装置，见图1至图5，包括壳体1，以及设置在壳体1中的透镜载体2、磁石组件3、线圈4、上弹片5、下弹片6、上弹片支架7和下绝缘垫片8；所述透镜载体2设置在上弹片5和下弹片6之间，所述磁石组件3设置在透镜载体2外周；所述线圈4设置在磁石组件3与透镜载体2之间。
所述壳体1包括导磁材料制成的上盖11和绝缘材料制成的底座12；所述上弹片支架7设置在上弹片5与上盖11顶壁之间，所述下绝缘垫片8设置在下弹片6与底座12之间。
本实施例中，所述磁石组件3包括多个位于同一平面的磁石31，各磁石31排成环状，相邻的两磁石31之间留有间隙，各磁石31接近透镜载体2的内侧端是一种磁极，在远离透镜载体2的径向方向上是另一磁极；
所述透镜载体2外壁上设有沿径向凸出的定位凸台21，所述线圈的底端设置在定位凸台21上。
所述线圈4的内壁通过胶水粘结固定在透镜载体2外壁上，所述透镜载体2的外壁上设有用于容置多余胶水的容胶槽22。所述容胶槽22正对线圈4内壁设置。
所述上弹片5包括位于四角处的四个固定区51、用于固定在透镜载体2上的内环区52、连接相应固定区51和内环区52的多个弹性臂区53、以及连接相邻两个固定区51的增强板54，各增强板54垂直于固定区51所在平面。
所述增强板54高出固定区51所在平面；所述各增强板54位于上弹片支架7的外周边缘与上盖11的侧壁111之间，或者所述各增强板54位于上弹片支架7的透孔71中。
所述各增强板54位于各固定区51的外周边缘处，相邻的两个增强板54之间留有缺口541。
所述上弹片5还包括用于连接相邻两个固定区51的连接区55，所述各连接区55与固定区51位于同一平面。
所述增强板54与上弹片5的固定区51、内环区52以及弹性臂区53是采用同一板材制成，所述增强板54是通过折弯该板材部分板体制成。
 本发明的实施方式
图 1 至图 5 显示了本发明的第一种具体实施方式，其中图 1 为本发明第一种结构的一种立体结构示意图；图 2 为图 1 所示音圈马达从另一角度观察时的一种立体结构示意图；图 3 为图 1 所示音圈马达的一种剖视图；图 4 为图 1 所示音圈马达的一种爆炸图；图 5 为图 1 所示音圈马达中上弹片的一种立体结构示意图。
本实施例是 一种透镜驱动装置，见图1至图5，包括壳体1，以及设置在壳体1中的透镜载体2、磁石组件3、线圈4、上弹片5、下弹片6、上弹片支架7和下绝缘垫片8；所述透镜载体2设置在上弹片5和下弹片6之间，所述磁石组件3设置在透镜载体2外周；所述线圈4设置在磁石组件3与透镜载体2之间。
所述壳体1包括导磁材料制成的上盖11和绝缘材料制成的底座12；所述上弹片支架7设置在上弹片5与上盖11顶壁之间，所述下绝缘垫片8设置在下弹片6与底座12之间。
本实施例中，所述磁石组件3包括多个位于同一平面的磁石31，各磁石31排成环状，相邻的两磁石31之间留有间隙，各磁石31接近透镜载体2的内侧端是一种磁极，在远离透镜载体2的径向方向上是另一磁极；
所述透镜载体2外壁上设有沿径向凸出的定位凸台21，所述线圈的底端设置在定位凸台21上。
所述线圈4的内壁通过胶水粘结固定在透镜载体2外壁上，所述透镜载体2的外壁上设有用于容置多余胶水的容胶槽22。所述容胶槽22正对线圈4内壁设置。
所述上弹片5包括位于四角处的四个固定区51、用于固定在透镜载体2上的内环区52、连接相应固定区51和内环区52的多个弹性臂区53、以及连接相邻两个固定区51的增强板54，各增强板54垂直于固定区51所在平面。
所述增强板54高出固定区51所在平面；所述各增强板54位于上弹片支架7的外周边缘与上盖11的侧壁111之间，或者所述各增强板54位于上弹片支架7的透孔71中。
所述各增强板54位于各固定区51的外周边缘处，相邻的两个增强板54之间留有缺口541。
所述上弹片5还包括用于连接相邻两个固定区51的连接区55，所述各连接区55与固定区51位于同一平面。
所述增强板54与上弹片5的固定区51、内环区52以及弹性臂区53是采用同一板材制成，所述增强板54是通过折弯该板材部分板体制成。
图6和图7显示了本发明的第二种具体实施方式，其中， 图 6 为本发明第二种结构的一种剖视图；图 7 为图 6 所示磁石组件的一种立体结构示意图。
本实施例与实施例 1 基本相同，不同之处在于： 所述磁石组件3包括上下双层呈环状排列的多个磁石31，同层中的多个磁石31排成环状，同层中相邻的两磁石31之间留有间隙；所述上层磁石31中各磁石31的上端是S极，下端是N极；下层各磁石31的上端是N极，下端是S极；所述各线圈4包括上线圈和下线圈，所述上线圈设置在下线圈正上方，且上线圈与下线圈之间留有间隙。所述上线圈41与下线圈42之间的间隙距离为该透镜驱动装置透镜载体2的行程距离。
所述透镜载体2外壁上设有沿径向凸出的定位凸台21，所述下线圈的底端设置在定位凸台21上。
图 8 为本发明第三种结构中上弹片的一种立体结构示意图， 显示了本发明的第三种具体实施方式。
本实施例与实施例 1 基本相同，不同之处在于： 所述上弹片5上不再设置用于连接相邻两个固定区51的连接区55，所述各固定区51之间设有用于将相邻两个固定区51隔断的间隙511。另外所述上弹片5的具体形状也与实施例1有所不同。
 工业实用性
本发明结构较为合理紧凑，不再需要传统透镜驱动装置中的导磁环，从而避免发生因导磁环磁力过强而导致的透镜载体偏心的弊病，不仅简化了制造工艺，还有效降低了制造成本。
上弹片包括连接相邻两个固定区的增强板，各增强板垂直于固定区所在平面，这种增强板可以在不提高占用面积的基础上，有效提高上弹片的强度，使其在安装操作时，不易发生永久形变，有效提高了成品率，从而在一定程度上降低了制造成本。尤其是通过采用增强板结构方式，还可以有效减小上弹片的占用面积，从而减小整体体积。
透镜载体外壁上设有容胶槽，在把线圈粘结固定在透镜载体外壁上时，可以收容多余的胶水，有效克服因胶水过多而溢出带来的种种弊端。
显然，本发明的上述实施例仅仅是为清楚地说明本发明所作的举例，而并非是对本发明的实施方式的限定。对于所属领域的普通技术人员来说，在上述说明的基础上还可以做出其它不同形式的变化或变动。这里无需也无法对所有的实施方式予以穷举。而这些属于本发明的实质精神所引伸出的显而易见的变化或变动仍属于本发明的保护范围。
 序列表自由内容

Claims (10)

  1. 一种透镜驱动装置，包括壳体（1），以及设置在壳体（1）中的透镜载体（2）、磁石组件（3）、线圈（4）、上弹片（5）和下弹片（6）；所述透镜载体（2）设置在上弹片（5）和下弹片（6）之间，所述磁石组件（3）设置在透镜载体（2）外周；其特征在于：所述线圈（4）设置在磁石组件（3）与透镜载体（2）之间。
  2. 根据权利要求1所述的透镜驱动装置，其特征在于：还包括上弹片支架（7）和下绝缘垫片（8）；所述壳体（1）包括导磁材料制成的上盖（11）和绝缘材料制成的底座（12）；所述上弹片支架（7）设置在上弹片（5）与上盖（11）顶壁之间，所述下绝缘垫片（8）设置在下弹片（6）与底座（12）之间。
  3. 根据权利要求2所述的透镜驱动装置，其特征在于：所述磁石组件（3）包括多个位于同一平面的磁石（31），各磁石（31）排成环状，相邻的两磁石（31）之间留有间隙，各磁石（31）接近透镜载体（2）的内侧端是一种磁极，在远离透镜载体（2）的径向方向上是另一磁极；
    或者所述磁石组件（3）包括上下双层呈环状排列的多个磁石（31），同层中的多个磁石（31）排成环状，同层中相邻的两磁石（31）之间留有间隙；所述上层磁石（31）中各磁石（31）的上端是S极，下端是N极；下层各磁石（31）的上端是N极，下端是S极；所述各线圈（4）包括上线圈和下线圈，所述上线圈设置在下线圈正上方，且上线圈与下线圈之间留有间隙。
  4. 根据权利要求3所述的透镜驱动装置，其特征在于：所述透镜载体（2）外壁上设有沿径向凸出的定位凸台（21），所述下线圈的底端设置在定位凸台（21）上。
  5. 根据权利要求1-4之一所述的透镜驱动装置，其特征在于：所述线圈（4）的内壁通过胶水粘结固定在透镜载体（2）外壁上，所述透镜载体（2）的外壁上设有用于容置多余胶水的容胶槽（22）。
  6. 根据权利要求5所述的透镜驱动装置，其特征在于：所述容胶槽（22）正对线圈（4）内壁设置。
  7. 根据权利要求3所述的透镜驱动装置，其特征在于：所述上线圈与下线圈之间的间隙距离为该透镜驱动装置透镜载体（2）的行程距离。
  8. 根据权利要求1所述的透镜驱动装置，其特征在于：所述上弹片（5）包括位于四角处的四个固定区（51）、用于固定在透镜载体（2）上的内环区（52）、连接相应固定区（51）和内环区（52）的多个弹性臂区（53）、以及连接相邻两个固定区（51）的增强板（54），各增强板（54）垂直于固定区（51）所在平面。
  9. 根据权利要求5所述的透镜驱动装置，其特征在于：所述上弹片（5）还包括用于连接相邻两个固定区（51）的连接区（55），所述各连接区（55）与固定区（51）位于同一平面。
  10. 根据权利要求5所述的透镜驱动装置，其特征在于：所述增强板（54）高出固定区（51）所在平面；所述各增强板（54）位于上弹片支架（7）的外周边缘与上盖（11）的侧壁（111）之间，或者所述各增强板（54）位于上弹片支架（7）的透孔（71）中。
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