JP2000187146A - Lens drive mechanism - Google Patents
Lens drive mechanismInfo
- Publication number
- JP2000187146A JP2000187146A JP10366715A JP36671598A JP2000187146A JP 2000187146 A JP2000187146 A JP 2000187146A JP 10366715 A JP10366715 A JP 10366715A JP 36671598 A JP36671598 A JP 36671598A JP 2000187146 A JP2000187146 A JP 2000187146A
- Authority
- JP
- Japan
- Prior art keywords
- optical axis
- lens group
- lens
- axis direction
- holding frame
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Landscapes
- Lens Barrels (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、レンズの駆動機構
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens driving mechanism.
【０００２】[0002]
【従来の技術】従来のレンズ駆動機構として、図３に示
す構成のものが知られている。同図において、１はレン
ズ群、２はレンズ枠、３はガイドバー、４はＵバー、５
はステッピングモーターのスクリュウ、６はラック、７
はラックバネ、２ｄはレンズ枠２のスリーブ部である。
図３のレンズの駆動機構には、レンズ群１を光軸方向に
移動させるために、アクチュエーターからの力を伝える
伝達部材（スクリュウ５およびラック６）と、伝達部材
とレンズ群との間に発生するスラスト方向のガタを除去
するための、弾性部材（ラックバネ）７とを設けてい
た。2. Description of the Related Art As a conventional lens driving mechanism, one having a configuration shown in FIG. 3 is known. In the figure, 1 is a lens group, 2 is a lens frame, 3 is a guide bar, 4 is a U bar, 5
Is a stepping motor screw, 6 is a rack, 7
Denotes a rack spring, and 2d denotes a sleeve portion of the lens frame 2.
The lens driving mechanism shown in FIG. 3 includes a transmission member (a screw 5 and a rack 6) that transmits a force from an actuator to move the lens group 1 in the optical axis direction, and a transmission member and a lens group formed between the transmission member and the lens group. An elastic member (rack spring) 7 is provided to remove backlash in the thrust direction.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら上記従来
例では、スラスト方向のガタを除去するための弾性部材
を設けているために、アクチュエーターとレンズ群との
間に設ける駆動力伝達部材が大きくなり、レンズの小型
化を進める上で障害となっていた。However, in the above conventional example, since the elastic member for removing the play in the thrust direction is provided, the driving force transmitting member provided between the actuator and the lens group becomes large. This was an obstacle to downsizing the lens.
【０００４】本発明は、上記従来例における問題点に鑑
みてなされたもので、レンズ駆動機構の小型化を図るこ
とを目的とする。[0004] The present invention has been made in view of the problems in the above conventional example, and has as its object to reduce the size of a lens driving mechanism.
【０００５】[0005]
【課題を解決するための手段および作用】上記目的を達
成するために、本発明は、駆動力伝達部材とレンズ群と
の間に発生するスラストガタを除去するために、駆動力
伝達部材に弾性部を設けて、従来の駆動力伝達部材およ
び弾性部材をこれに代替えし小型化を実現したものであ
る。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an elastic member provided on a driving force transmitting member for removing thrust play generated between the driving force transmitting member and a lens group. Are provided to replace the conventional driving force transmitting member and the elastic member, thereby realizing miniaturization.
【０００６】[0006]
【実施例】以下、図面を用いて本発明の実施例を説明す
る。 （第１の実施例）図１は本発明の一実施例に係るレンズ
駆動機構の構成を示す。同図において、１は光軸方向に
進退する対物レンズ群、２はレンズ群１を包含するレン
ズ枠、３はレンズ枠２を光軸方向にガイドするガイドバ
ー、４はレンズ枠２がガイドバー３を中心として光軸と
直交する面内のいずれかの方向（以下、光軸と直交方向
という）に回転することを抑止するＵバー、５はレンズ
枠２を光軸方向に進退させるための駆動力を発生させる
ステッピングモーターのスクリュウ、６はスクリュウ５
の光軸と直交方向の回転力を光軸方向に進退する力に変
換するラックである。Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) FIG. 1 shows the configuration of a lens driving mechanism according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes an objective lens group that advances and retreats in the optical axis direction, 2 denotes a lens frame including the lens group 1, 3 denotes a guide bar that guides the lens frame 2 in the optical axis direction, and 4 denotes a guide bar that guides the lens frame 2 in the optical axis direction. A U-bar 5 for preventing rotation in any direction in a plane orthogonal to the optical axis (hereinafter, referred to as an orthogonal direction to the optical axis) with respect to 3, and 5 for moving the lens frame 2 forward and backward in the optical axis direction. Screw of stepping motor to generate driving force, 6 is screw 5
Is a rack that converts a rotational force in a direction orthogonal to the optical axis of the optical axis into a force that advances and retreats in the optical axis direction.
【０００７】組み立ては、ラック６を右側に９０度傾け
た状態でその取付軸６ｄをレンズ枠２のスリーブ部２ｄ
の上部に設けられたスリットを通してＶ型形状部２ａの
位置まで降ろし、次に左へ約９０度回転してラック６の
歯型形状部６ａに上からスクリュウ５の歯を噛み合わせ
る。[0007] Assembling is performed by attaching the mounting shaft 6d of the rack 6 to the sleeve 2d of the lens frame 2 in a state where the rack 6 is tilted 90 degrees to the right.
Is lowered to the position of the V-shaped portion 2a through a slit provided at the upper portion of the rack 6, and then rotated about 90 degrees to the left to engage the teeth of the screw 5 with the tooth-shaped portion 6a of the rack 6 from above.
【０００８】このレンズ駆動機構においては、スクリュ
ウ５にラック６の歯型形状部６ａが当接することによ
り、ラック６の弾性部６ｃがレンズ枠２のスリーブ部２
ｄに当接することで光軸と直交方向の回転力が生じ、こ
の回転力によりラック６の回転中心である取付軸６ｄは
レンズ枠２のＶ型形状部２ａに片寄せられ、さらにレン
ズ枠２のＶ型形状をしたスリーブ穴２ｂはガイドバー３
に片寄せられ、Ｕ溝部２ｃ部はＵバー４に片寄せられ
る。また、ラック６の弾性部６ｃにより発生する回転力
によりスクリュウ５とラック６の歯型形状部６ａの当接
部に発生する光軸方向のガタを除去し、ラック６のコの
字形の弾性部６ｂ部により発生する力によりラック６と
レンズ枠２との間に発生する光軸方向のガタを除去する
ことができる。In this lens drive mechanism, the tooth-shaped portion 6a of the rack 6 comes into contact with the screw 5, so that the elastic portion 6c of the rack 6
d, a rotational force in a direction perpendicular to the optical axis is generated, and the rotational force causes the mounting shaft 6d, which is the center of rotation of the rack 6, to be biased toward the V-shaped portion 2a of the lens frame 2, and the lens frame 2 The V-shaped sleeve hole 2b is
, And the U-groove 2 c is biased to the U-bar 4. Also, rattling in the optical axis direction generated at the contact portion between the screw 5 and the tooth-shaped portion 6a of the rack 6 due to the rotational force generated by the elastic portion 6c of the rack 6 is removed, and the U-shaped elastic portion of the rack 6 is removed. The play in the optical axis direction generated between the rack 6 and the lens frame 2 due to the force generated by the portion 6b can be removed.
【０００９】図１と図３を比較すれば明らかなように、
図１のレンズ駆動機構の駆動力伝達部材であるラック６
の光軸方向の占有長さＡは図３におけるそれＢの１／２
より小さくなっている。As is apparent from a comparison between FIG. 1 and FIG.
Rack 6 which is a driving force transmitting member of the lens driving mechanism of FIG.
The occupied length A in the optical axis direction is 1/2 of that in FIG.
It is smaller.
【００１０】（第２の実施例）図２は本発明の他の実施
例に係るレンズ駆動機構の構成を示す。同図のレンズ駆
動機構は、図１のものに対し、スクリュウ５の位置、し
たがってラック６の取り付け方向を変更したもので、ス
リーブ部２ｄにラック６の取付軸６ｄを通すためのスリ
ットの方向も右に９０度ずらしてある。それ以外は図１
のものと同様に構成され、同様に作用する。(Second Embodiment) FIG. 2 shows the structure of a lens driving mechanism according to another embodiment of the present invention. The lens driving mechanism shown in the figure is different from that shown in FIG. 1 in that the position of the screw 5 and therefore the mounting direction of the rack 6 are changed, and the direction of the slit for passing the mounting shaft 6d of the rack 6 through the sleeve portion 2d is also changed. It is shifted 90 degrees to the right. Otherwise Figure 1
Are configured and act similarly.
【００１１】[0011]
【発明の効果】以上説明したように、本発明によれば、
極めて簡略化された鏡筒構造のため、組立てコスト、部
品コストおよび精度管理コストを削減でき、またスラス
トとラジアル方向のガタを除去することにより、画質劣
化や像揺れを回避できながら、レンズの小型化を実現す
ることができる。As described above, according to the present invention,
The extremely simplified lens barrel structure can reduce assembly costs, component costs, and accuracy control costs.Also, by eliminating thrust and radial play, image quality degradation and image shaking can be avoided, while miniaturizing the lens. Can be realized.
【図面の簡単な説明】[Brief description of the drawings]
【図１】 本発明の第１の実施例に係るレンズ駆動機構
の説明図である。FIG. 1 is an explanatory diagram of a lens driving mechanism according to a first embodiment of the present invention.
【図２】 本発明の他の実施例に係るレンズ駆動機構の
説明図である。FIG. 2 is an explanatory diagram of a lens driving mechanism according to another embodiment of the present invention.
【図３】 従来例に係るレンズ駆動機構の説明図であ
る。FIG. 3 is an explanatory diagram of a lens driving mechanism according to a conventional example.
１：レンズ群、２：レンズ枠、２ａ：Ｖ型形状部、２
ｂ：スリーブ穴、２ｃ：Ｖ溝部、２ｄ：スリーブ部、
３：ガイドバー、４：Ｕバー、５：ステッピングモータ
ーのスクリュウ、６：ラック、６ａ：歯型形状部、６
ｂ，６ｃ：弾性部、６ｄ：取付軸、７：ラックバネ。1: lens group, 2: lens frame, 2a: V-shaped portion, 2
b: sleeve hole, 2c: V groove, 2d: sleeve
3: Guide bar, 4: U bar, 5: screw of stepping motor, 6: rack, 6a: tooth shape portion, 6
b, 6c: elastic part, 6d: mounting shaft, 7: rack spring.
Claims (2)
を包含する保持枠と、保持枠を光軸方向に進退するよう
ガイドするガイド部材と、保持枠をガイド部材中心に光
軸と直交方向に回転することを抑止する回転抑止部材
と、レンズ群を光軸方向に駆動制御するための駆動装置
と、駆動装置からの駆動力をレンズ群を保持する保持枠
に伝達するための部材を備えたレンズ駆動機構におい
て、前記駆動力伝達部材には光軸方向と光軸に直交する
方向の二方向に弾性力を発生する弾性形状を備えたこと
を特徴とするレンズ駆動機構。1. A holding frame including a lens group that moves in a direction of an optical axis in an optical system, a guide member that guides the holding frame to move in a direction of the optical axis, and an optical axis that moves the holding frame around the guide member. A rotation suppressing member for suppressing rotation in the orthogonal direction, a driving device for drivingly controlling the lens group in the optical axis direction, and a member for transmitting a driving force from the driving device to a holding frame holding the lens group. Wherein the driving force transmitting member has an elastic shape that generates elastic force in two directions, an optical axis direction and a direction orthogonal to the optical axis.
の光軸方向と光軸に直交する方向の二方向に弾性力を発
生する弾性形状部は略コの字型形状となっていることを
特徴とするレンズ駆動機構。2. The elastic member according to claim 1, wherein the driving force transmitting member has an approximately U-shaped elastic shape portion that generates elastic force in two directions, an optical axis direction and a direction orthogonal to the optical axis. A lens driving mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10366715A JP2000187146A (en) | 1998-12-24 | 1998-12-24 | Lens drive mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10366715A JP2000187146A (en) | 1998-12-24 | 1998-12-24 | Lens drive mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000187146A true JP2000187146A (en) | 2000-07-04 |
Family
ID=18487484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10366715A Pending JP2000187146A (en) | 1998-12-24 | 1998-12-24 | Lens drive mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000187146A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002214505A (en) * | 2001-01-15 | 2002-07-31 | Sony Corp | Lens driving device |
| EP1319968A2 (en) * | 2001-12-03 | 2003-06-18 | Leica Microsystems Heidelberg GmbH | Microscopic objective with motor-driven lenses, microscope and method for imaging a sample |
| EP1110661A3 (en) * | 1999-11-30 | 2003-08-13 | Canon Kabushiki Kaisha | Laser working apparatus, laser working method, method for producing ink jet recording head utilizing such laser working apparatus or method, and ink jet recording head formed by such producing method |
| JP2005077712A (en) * | 2003-08-29 | 2005-03-24 | Kyocera Corp | Zoom lens unit |
| JP2005077713A (en) * | 2003-08-29 | 2005-03-24 | Kyocera Corp | Zoom lens unit |
| JP2007065075A (en) * | 2005-08-29 | 2007-03-15 | Fujinon Corp | Lens feed mechanism |
| JP2010085991A (en) * | 2008-09-08 | 2010-04-15 | Panasonic Corp | Lens barrel and imaging device |
| JP2011059566A (en) * | 2009-09-14 | 2011-03-24 | Tamron Co Ltd | Optical device and imaging apparatus |
| CN102645723A (en) * | 2009-03-26 | 2012-08-22 | 三洋电机株式会社 | Lens drive device |
-
1998
- 1998-12-24 JP JP10366715A patent/JP2000187146A/en active Pending
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1110661A3 (en) * | 1999-11-30 | 2003-08-13 | Canon Kabushiki Kaisha | Laser working apparatus, laser working method, method for producing ink jet recording head utilizing such laser working apparatus or method, and ink jet recording head formed by such producing method |
| US6747244B1 (en) | 1999-11-30 | 2004-06-08 | Canon Kabushiki Kaisha | Laser working apparatus, laser working method, method for producing ink jet recording head utilizing such laser working apparatus or method, and ink jet recording head formed by such producing method |
| JP2002214505A (en) * | 2001-01-15 | 2002-07-31 | Sony Corp | Lens driving device |
| EP1319968A2 (en) * | 2001-12-03 | 2003-06-18 | Leica Microsystems Heidelberg GmbH | Microscopic objective with motor-driven lenses, microscope and method for imaging a sample |
| EP1319968A3 (en) * | 2001-12-03 | 2004-09-08 | Leica Microsystems Heidelberg GmbH | Microscopic objective with motor-driven lenses, microscope and method for imaging a sample |
| US6909540B2 (en) | 2001-12-03 | 2005-06-21 | Leica Microsystems Heidelberg Gmbh | Microscope objective, microscope, and method for imaging a specimen |
| JP2005077712A (en) * | 2003-08-29 | 2005-03-24 | Kyocera Corp | Zoom lens unit |
| JP2005077713A (en) * | 2003-08-29 | 2005-03-24 | Kyocera Corp | Zoom lens unit |
| JP2007065075A (en) * | 2005-08-29 | 2007-03-15 | Fujinon Corp | Lens feed mechanism |
| JP4735821B2 (en) * | 2005-08-29 | 2011-07-27 | 富士フイルム株式会社 | Lens feed mechanism |
| JP2010085991A (en) * | 2008-09-08 | 2010-04-15 | Panasonic Corp | Lens barrel and imaging device |
| US8824069B2 (en) | 2008-09-08 | 2014-09-02 | Panasonic Corporation | Lens barrel |
| US8824070B2 (en) | 2008-09-08 | 2014-09-02 | Panasonic Corporation | Lens barrel and imaging device |
| US8848302B2 (en) | 2008-09-08 | 2014-09-30 | Panasonic Corporation | Lens barrel and imaging device |
| US8879177B2 (en) | 2008-09-08 | 2014-11-04 | Panasonic Corporation | Lens barrel and imaging device |
| US8879178B2 (en) | 2008-09-08 | 2014-11-04 | Panasonic Corporation | Lens barrel and imaging device |
| US8913333B2 (en) | 2008-09-08 | 2014-12-16 | Panasonic Intellectual Property Management Co., Ltd. | Lens barrel and imaging device |
| CN102645723A (en) * | 2009-03-26 | 2012-08-22 | 三洋电机株式会社 | Lens drive device |
| JP2011059566A (en) * | 2009-09-14 | 2011-03-24 | Tamron Co Ltd | Optical device and imaging apparatus |
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