JP2017021365A5

JP2017021365A5 -

Info

Publication number: JP2017021365A5
Application number: JP2016179409A
Authority: JP
Filing date: 2016-09-14
Publication date: 2017-05-18
Anticipated expiration: 2031-08-24

Description

本発明によれば、レンズバレル（１２）を光軸（Ｏ）に沿って移動させるオートフォーカス用レンズ駆動部（２０；２０Ａ）と、このオートフォーカス用レンズ駆動部を、光軸（Ｏ）に直交し、かつ互いに直交する第１の方向（Ｘ）及び第２の方向（Ｙ）に移動させることにより、手振れを補正するようにした手振れ補正部とを有するレンズ駆動装置（１０；１０Ａ）であって、
手振れ補正部は、
オートフォーカス用レンズ駆動部（２０；２０Ａ）から光軸（Ｏ）方向に離間して配置された固定部材（１４、１８、４０、４４）と、
固定部材（１４、１８、４０、４４）の外周部で一端が固定された複数本のサスペンションワイヤ（１６）であって、光軸（Ｏ）に沿って延在して他端がオートフォーカス用レンズ駆動部（２０；２０Ａ）に固定され、オートフォーカス用レンズ駆動部（２０；２０Ａ）を、第１の方向（Ｘ）及び第２の方向（Ｙ）に揺動可能に支持する、複数本のサスペンションワイヤ（１６）と、
を有し、
オートフォーカス用レンズ駆動部（２０；２０Ａ）は、
レンズバレル（１２）を保持するための筒状部（２４０）を有するレンズホルダ（２４）と、
レンズホルダ（２４）に、筒状部（２４０）の周囲に位置するように固定されたフォーカスコイル（２６）と、
フォーカスコイル（２６）と対向して配置された永久磁石（２８）と、
レンズホルダ（２４）の外周に配置されて、永久磁石（２８）を保持するマグネットホルダ（３０）と、
マグネットホルダ（３０）の光軸（Ｏ）方向の第１の端（３０ａ）に取り付けられた第１の板バネ（３２）と、第１の板バネ（３２）に比べて固定部材（１４、１８、４０、４４）の近傍に配置され、マグネットホルダ（３０）の光軸（Ｏ）方向の第２の端（３０ｂ）に取り付けられ、少なくとも１つの穴（３４４ａ）が設けられている、第２の板バネ（３４）からなり、第１及び第２の板バネ（３２，３４）により、レンズホルダ（３０）を径方向に位置決めした状態で光軸（Ｏ）方向に変位可能に支持する板バネ部（３２，３４）と、
マグネットホルダ（３０）の第２の端（３０ｂ）から光軸（Ｏ）方向に固定部材（１４、１８、４０、４４）へ向けて突出し、第２の板バネ（３４）の少なくとも１つの穴（３４４ａ）に装入される少なくとも１つの突起（３０６ａ）と、
を有し、
レンズ駆動装置（１０；１０Ａ）は、
複数本のサスペンションワイヤ（１６）の他端は、第１の板バネ（３２）に固定されており、
少なくとも１つの突起（３０６ａ）と固定部材（１４、１８、４０、４４）との間に配設され、オートフォーカス用レンズ駆動部（２０；２０Ａ）の光軸（Ｏ）方向における不要共振を抑えるダンパ材（６５）をさらに有する、
レンズ駆動装置（１０；１０Ａ）が得られる。 According to the present invention, the autofocus lens driving section (20; 20A) for moving the lens barrel (12) along the optical axis (O) and the autofocus lens driving section on the optical axis (O). A lens driving device (10; 10A) having a camera shake correction unit that corrects camera shake by moving in a first direction (X) and a second direction (Y) that are orthogonal and orthogonal to each other. There,
The image stabilization unit
A fixing member (14, 18, 40, 44) disposed away from the autofocus lens driving unit (20; 20A) in the optical axis (O) direction;
A plurality of suspension wires (16) having one end fixed at the outer peripheral portion of the fixing member (14, 18, 40, 44), extending along the optical axis (O) and the other end for autofocusing A plurality of lenses fixed to the lens driving section (20; 20A) and supporting the autofocus lens driving section (20; 20A) so as to be swingable in the first direction (X) and the second direction (Y). Suspension wire (16) of
Have,
The autofocus lens driver (20; 20A)
A lens holder (24) having a cylindrical portion (240) for holding the lens barrel (12);
A focus coil (26) fixed to the lens holder (24) so as to be positioned around the cylindrical portion (240);
A permanent magnet (28) disposed opposite the focus coil (26);
A magnet holder (30) disposed on the outer periphery of the lens holder (24) and holding the permanent magnet (28);
The first plate spring (32) attached to the first end (30a) in the optical axis (O) direction of the magnet holder (30) and the fixed member (14, compared to the first plate spring (32)) disposed in the vicinity of the 18,40,44) is attach to the optical axis of the magnet holder (30) (O) direction of the second end (3 0b), at least one hole (344a) is provided The first and second leaf springs (32, 34) can be displaced in the optical axis (O) direction with the lens holder (30) positioned in the radial direction. Leaf springs (32, 34) supported by
Ma Gunetto second end of the holder (30) (30 b) or Stanislaus Lo Kuang axis (O) projecting toward the direction to the fixed member (14,18,40,44), at least of the second plate spring (34) At least one protrusion (306a) inserted into one hole (344a) ;
Have
The lens driving device (10; 10A)
The other ends of the plurality of suspension wires (16) are fixed to the first leaf spring (32),
Arranged between at least one protrusion (306a) and the fixing member (14, 18, 40, 44) to suppress unnecessary resonance in the optical axis (O) direction of the autofocus lens driving section (20; 20A). Further comprising a damper material (65),
A lens driving device (10; 10A) is obtained.

上記本発明によるレンズ駆動装置（１０；１０Ａ）において、オートフォーカス用レンズ駆動部（２０；２０Ａ）の光軸（Ｏ）方向における不要共振を抑えるダンパ材（６５）は、マグネットホルダ（３０）と固定部材（１４、１８、４０、４４）との間の８箇所に配設されてよい。また、上記本発明によるレンズ駆動装置（１０；１０Ａ）において、複数本のサスペンションワイヤ（１６）が配置されている固定部材（１４、１８、４０、４４）の外周部の四隅部に配置され、
ダンパ材（６５）は、前記マグネットホルダと固定部材（１４、１８、４０、４４）との間の、固定部材（１４、１８、４０、４４）の外周部の四隅部と四辺部とにそれぞれ配設されてよい。 In the lens driving device (10; 10A) according to the present invention, the damper material (65) for suppressing unnecessary resonance in the optical axis (O) direction of the autofocus lens driving unit (20; 20A ) is a magnet holder (30 ). And eight fixing members (14, 18, 40, 44). In the lens driving device (10; 10A) according to the present invention, the lens driving device (10; 10A ) is arranged at the four corners of the outer peripheral portion of the fixing member (14, 18, 40, 44) on which the plurality of suspension wires (16) are arranged.
The damper material (65) is provided at each of the four corners and four sides of the outer periphery of the fixing member (14, 18, 40, 44) between the magnet holder and the fixing member (14, 18, 40, 44). It may be arranged .

Claims

An autofocus lens driving unit that moves the lens barrel along the optical axis, and the autofocus lens driving unit are moved in a first direction and a second direction that are orthogonal to the optical axis and orthogonal to each other. A lens driving device having a camera shake correction unit configured to correct camera shake,
The image stabilization unit is
A fixing member disposed away from the autofocus lens driving unit in the optical axis direction;
A plurality of suspension wires having one end fixed at an outer peripheral portion of the fixing member, extending along the optical axis and having the other end fixed to the autofocus lens driving unit; A plurality of suspension wires that support a drive unit in a swingable manner in the first direction and the second direction;
Have,
The autofocus lens driving unit is:
A lens holder having a cylindrical portion for holding the lens barrel;
A focus coil fixed to the lens holder so as to be positioned around the cylindrical portion;
A permanent magnet disposed opposite the focus coil;
A magnet holder disposed on the outer periphery of the lens holder to hold the permanent magnet;
A first leaf spring attached to a first end of the magnet holder in the optical axis direction, and is disposed closer to the fixing member than the first leaf spring, and the optical axis direction of the magnet holder the second is attach the edge of, at least one hole is provided, consists of a second plate spring, by the first and second leaf springs, and positioning the lens holder in a radial direction A leaf spring portion that is displaceably supported in the optical axis direction in a state;
At least one projection to be charged into the second end or al before protrudes toward Kihikarijiku direction to the stationary member, the at least one hole of said second plate spring before Symbol magnet holder,
Have
The lens driving device includes:
A damper material that is disposed between the at least one protrusion and the fixing member and suppresses unnecessary resonance of the autofocus lens driving unit in the optical axis direction;
Lens drive device.

2. The damper material that suppresses unnecessary resonance in the optical axis direction of the autofocus lens driving unit is disposed at eight positions between the magnet holder and the fixing member. The lens drive device described in 1.

The protrusions are disposed at four corners of the outer peripheral portion of the fixing member where the plurality of suspension wires are disposed,
The damper material is disposed at each of the four corners and the four sides of the outer peripheral portion of the fixing member between the magnet holder and the fixing member.
The lens driving device according to claim 2.

The fixing member is
A base for fixing one end of the plurality of suspension wires at the outer periphery;
A coil substrate fixed on the base and formed with a camera shake correction coil of the camera shake correction unit;
With
The damper member, said projection and said is disposed between the coil substrate, the lens driving device according to any one of claims 1 to 3.

The permanent magnet is composed of four permanent magnet pieces, each of the four permanent magnet pieces having a first surface facing the focus coil, and a radius of the focus coil with respect to the optical axis. Arranged on the outer side in the direction facing the first direction and the second direction,
The camera shake correction coil includes four camera shake correction coil portions disposed on the coil substrate so as to face the second surface perpendicular to the first surface of the four permanent magnet pieces, respectively. The lens driving device according to claim 4.

Said magnet holder has a guide groove for guiding a dispenser for applying the damper member, the lens driving device according to any one of claims 1 to 5.

A lens driving device according to any one of claims 1 to 6,
An image sensor disposed on an imaging substrate disposed on the opposite side of the autofocus lens driving unit with respect to the fixing member;
Having a camera module.

A camera module according to claim 7;
A control unit for controlling the camera module;
Having a camera.