JP2003232979A - Lens driving device - Google Patents
Lens driving deviceInfo
- Publication number
- JP2003232979A JP2003232979A JP2002030848A JP2002030848A JP2003232979A JP 2003232979 A JP2003232979 A JP 2003232979A JP 2002030848 A JP2002030848 A JP 2002030848A JP 2002030848 A JP2002030848 A JP 2002030848A JP 2003232979 A JP2003232979 A JP 2003232979A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- optical axis
- cam
- guide
- axis direction
- 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.)
- Granted
Links
Landscapes
- Camera Bodies And Camera Details Or Accessories (AREA)
- Studio Devices (AREA)
- Lens Barrels (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はレンズ駆動装置及び
それを用いた光学機器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 device and an optical device using the same.
【０００２】[0002]
【従来の技術】従来、例えば特開平８−２４０７５８号
公報に示されているように、レンズ駆動装置は２本のガ
イドバーにより保持される移動環をモーター、モーター
からの出力軸にネジ加工を施し、送りねじとし、この送
りねじに噛合するラック部材とラック部材をスラスト方
向に付勢する弾性部材により構成されている。2. Description of the Related Art Conventionally, as disclosed in, for example, Japanese Unexamined Patent Publication No. 8-240758, a lens driving device has a moving ring held by two guide bars, which is screwed on a motor and an output shaft from the motor. The feed screw is formed by a rack member that meshes with the feed screw and an elastic member that biases the rack member 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
例のレンズ駆動装置では、円滑に高精度に移動環を移動
させるために、前記送りネジに高い面精度が必要で高価
な部品となっており、高価なレンズ駆動装置となってい
た。However, in the lens driving device of the above-mentioned conventional example, in order to move the moving ring smoothly and with high precision, the feed screw requires high surface precision and is an expensive component. It was an expensive lens driving device.
【０００４】また、送りねじとラック部材による構成は
移動環に対する静圧や衝撃に対して弱いという問題があ
った。Further, the structure of the feed screw and the rack member has a problem that it is weak against static pressure and impact on the moving ring.
【０００５】[0005]
【課題を解決するための手段】そこで本考案のレンズ駆
動装置では、複数のレンズを保持するレンズ保持部材
と、前記レンズ保持部材を光軸方向にガイドするための
複数のガイド構成部材と、前記レンズ保持部材を光軸方
向に移動させるカム部材と、前記カム部材を回動させる
駆動手段を備えたレンズ駆動装置であって、前記カム部
材を、前記レンズ保持部材と前記カム部材の当接部の略
対称側で弾性的に光軸方向に付勢すると共に、前記ガイ
ド構成部材の少なくとも１つによって光軸方向の移動量
を規制することで、静圧や衝撃に強く、安価な部品構成
で高精度のレンズ駆動装置とすることが可能となる。Therefore, in the lens driving device of the present invention, a lens holding member for holding a plurality of lenses, a plurality of guide constituent members for guiding the lens holding member in the optical axis direction, and A lens driving device comprising: a cam member for moving a lens holding member in an optical axis direction; and a driving means for rotating the cam member, wherein the cam member is a contact portion between the lens holding member and the cam member. Is elastically urged in the direction of the optical axis on the substantially symmetrical side, and the amount of movement in the direction of the optical axis is regulated by at least one of the guide constituent members, so that it is resistant to static pressure and impact, and is an inexpensive component structure. It becomes possible to make it a highly accurate lens drive device.
【０００６】さらに、前記ガイド構成部の少なくとも１
つのガイド構成部材に、前記駆動手段を取り付ける。Further, at least one of the guide components
The drive means is attached to one guide component.
【０００７】前記ガイド構成部材の少なくとも１つのガ
イド構成部材に、前記カム部材の回転方向の位置検出の
ための素子を取り付ける。An element for detecting the rotational position of the cam member is attached to at least one guide constituent member of the guide constituent members.
【０００８】前記ガイド構成部材の少なくとも１つのガ
イド構成部材に、複数のファインダーレンズを組み込む
ことで、部品点数の削減とコンパクト化も可能となる。By incorporating a plurality of finder lenses in at least one of the guide constituent members, the number of parts can be reduced and the size can be reduced.
【０００９】[0009]
【発明の実施の形態】（第１の実施形態）図１、図２、
図３は本実施形態によるレンズ駆動装置の断面図を示す
もので、１、２は撮影レンズ、３は撮影レンズ１、２を
保持するレンズ保持部材、４は不図示の複数の開口径に
切り替え可能な絞り駆動部と不図示の開口径を開閉可能
に駆動するシャッター駆動部を備えており、レンズ保持
部材の光軸と垂直方向に組み込み可能な絞り・シャッタ
ーユニット、５はレンズ保持部材３を光軸方向に移動さ
せるためのカム部５ａを有したカム部材、６はカム部材
５を回転可能に保持するベース部材（第一のガイド構成
部材）、７はベース部材６に位置決め、取り付けされる
カバー部材（第二のガイド構成部材）、８はレンズ保持
部材３の腕部３ａ、３ｂとかん合し、ベース部材６とカ
バー部材７によって保持、構成されるレンズ保持部材３
の光軸方向のガイド部材（第三のガイド構成部材）、９
はレンズ保持部材３のカム当接部３ｃをカム部材５のカ
ム部５ａに付勢するための弾性部材、１０はカム当接部
３ｃの略対称位置でカム部材５をベース部材６に付勢す
るための弾性部材、１１はカバー部材７に取り付けられ
るモーター、１２はモーター１１の出力軸に圧入固定さ
れているピニオンギア、１３はカバー部材７に取り付け
られるＰｈｏｔｏ Ｉｎｔｅｒｒｕｐｔｅｒ（ＰＩ）、
１４はベース部材６に組み込まれるギア部材、１５はＣ
ＣＤ、１６はＣＣＤ１５を保持し、ベース部材６に取り
付けられるＣＣＤ保持部材、１７はベース部材６とＣＣ
Ｄ１５の間に位置されるシールド部材、１８，１９はカ
バー部材７に組み込まれるファインダーレンズ、２０は
ファインダーカバー部材、である。BEST MODE FOR CARRYING OUT THE INVENTION (First Embodiment) FIGS.
FIG. 3 is a cross-sectional view of the lens driving device according to the present embodiment, wherein 1 and 2 are photographic lenses, 3 is a lens holding member that holds the photographic lenses 1 and 2, and 4 is a plurality of aperture diameters not shown. It has a possible diaphragm drive unit and a shutter drive unit that drives the aperture diameter (not shown) so that it can be opened and closed. A cam member having a cam portion 5a for moving in the optical axis direction, 6 is a base member (first guide constituent member) that rotatably holds the cam member 5, and 7 is positioned and attached to the base member 6. The cover member (second guide constituent member) 8 is engaged with the arm portions 3a and 3b of the lens holding member 3, and is held and configured by the base member 6 and the cover member 7.
Optical axis direction guide member (third guide constituent member), 9
Is an elastic member for urging the cam contact portion 3c of the lens holding member 3 toward the cam portion 5a of the cam member 5, and 10 is an urging force of the cam member 5 toward the base member 6 at a substantially symmetrical position of the cam contact portion 3c. An elastic member for performing the operation, 11 is a motor attached to the cover member 7, 12 is a pinion gear press-fitted and fixed to the output shaft of the motor 11, 13 is a Photo Interrupter (PI) attached to the cover member 7,
14 is a gear member incorporated in the base member 6, and 15 is a C member.
CDs and 16 hold a CCD 15 and a CCD holding member attached to the base member 6, and 17 a base member 6 and CC.
Shield members positioned between D15, 18 and 19 are finder lenses incorporated in the cover member 7, and 20 is a finder cover member.
【００１０】以上のような構成において、モーター１１
からの出力が、ピニオンギア１２、ギア部材１４、カム
部材５のギア部５ｂへ伝達され、カム部材５が回動され
ると、レンズ保持部材３は、ガイド部材８と腕部３ａ、
３ｂ、ベース部材６と一体で形成されているガイド部６
ａとレンズ保持部材３の腕部３ｄの２箇所のガイド部に
よって光軸方向にガイドされ、レンズ保持部材３は光軸
方向へ駆動される。In the above structure, the motor 11
When the cam member 5 is rotated by transmitting the output from the pinion gear 12, the gear member 14, and the gear portion 5b of the cam member 5, the lens holding member 3 causes the guide member 8 and the arm portion 3a to move.
3b, a guide portion 6 formed integrally with the base member 6
The lens holding member 3 is driven in the optical axis direction by being guided in the optical axis direction by two guide portions of a and the arm portion 3d of the lens holding member 3.
【００１１】またカム部材５の凸部５ｃがＰＩ１３を通
過することで、カム部材５の回転方向の所定位置を検出
し、撮影レンズ１、２の光軸方向の所定位置の検出が可
能となっている。Further, when the convex portion 5c of the cam member 5 passes through the PI 13, a predetermined position in the rotation direction of the cam member 5 can be detected, and a predetermined position in the optical axis direction of the taking lenses 1 and 2 can be detected. ing.
【００１２】カム部材５が回動されているときカム部材
５は、弾性部材９によりカム当接部３ｃの位置で、また
弾性部材１０により３ｃの位置と略対称位置でベース部
材６に付勢されているので、カメラの姿勢にかかわらず
高精度なレンズの駆動が可能となっている。さらに、カ
バー部材７と一体で形成されている凸部７ａによって光
軸方向のガタつきが最小となるように設定されているの
で、レンズ保持部材３に静圧や衝撃が加わった時にもこ
れらの力を受け止めることが可能となっている。When the cam member 5 is rotated, the cam member 5 is urged to the base member 6 by the elastic member 9 at the position of the cam contact portion 3c and by the elastic member 10 at a position substantially symmetrical to the position of 3c. Therefore, it is possible to drive the lens with high accuracy regardless of the posture of the camera. Further, since the projection 7a formed integrally with the cover member 7 is set so as to minimize the rattling in the optical axis direction, even when static pressure or impact is applied to the lens holding member 3, these It is possible to receive power.
【００１３】また、レンズの光軸方向の駆動を製作が容
易でかつ安価なカム部材５で行っているので、安価な構
成のレンズ駆動装置とすることができる。Further, since the lens is driven in the optical axis direction by the inexpensive and easy-to-manufacture cam member 5, a lens driving device having an inexpensive structure can be obtained.
【００１４】さらには、モーター１１、ＰＩ１３、ファ
インダーレンズ１８、１９をカバー部材７に取り付ける
ように構成しているので、部品点数の削減とコンパクト
化も可能となっている。Further, since the motor 11, the PI 13, and the viewfinder lenses 18 and 19 are attached to the cover member 7, the number of parts can be reduced and the size can be reduced.
【００１５】[0015]
【発明の効果】以上説明したように本考案では、カム部
材５を、レンズ保持部材３とカム部材５の当接部５ｃの
略対称側で弾性的に光軸方向に付勢すると共に、カバー
部材７の凸部７ａによって光軸方向の移動量を規制する
ことで、静圧や衝撃に強く、安価な部品構成で高精度の
レンズ駆動装置とすることが可能となる。As described above, according to the present invention, the cam member 5 is elastically biased in the optical axis direction on the substantially symmetrical side of the lens holding member 3 and the contact portion 5c of the cam member 5, and the cover is provided. By restricting the amount of movement in the optical axis direction by the convex portion 7a of the member 7, it is possible to obtain a highly accurate lens driving device that is resistant to static pressure and impact and that has an inexpensive component configuration.
【００１６】また、モーター１１、ＰＩ１３、ファイン
ダーレンズ１８、１９をカバー部材７に取り付けるよう
に構成しているので、部品点数の削減とコンパクト化も
可能となっている。Further, since the motor 11, the PI 13, and the viewfinder lenses 18 and 19 are attached to the cover member 7, the number of parts can be reduced and the size can be reduced.
【図１】本考案の第一の実施形態を表す横中央断面図。FIG. 1 is a lateral center sectional view showing a first embodiment of the present invention.
【図２】本考案の第一の実施形態を表す縦中央断面図。FIG. 2 is a vertical center sectional view showing a first embodiment of the present invention.
【図３】本考案の第一の実施形態を表す駆動手段部断面
図。FIG. 3 is a cross-sectional view of a driving means portion showing the first embodiment of the present invention.
１、２ 撮影レンズ ３ レンズ保持部材 ４ 絞り・シャッターユニット ５ カム部材 ６ ベース部材 ７ カバー部材 ８ ガイド部材 ９ 弾性部材 １０ 弾性部材 １１ モーター １２ ピニオンギア １３ ｐｈｏｔｏ ｉｎｔｅｒｒｕｐｔｅｒ １４ ギア部材 １５ ＣＣＤ １６ ＣＣＤ保持部材 １７ シールド部材 １８、１９ ファインダーレンズ ２０ ファインダーカバー部材 1 and 2 shooting lens 3 Lens holding member 4 Aperture / Shutter unit 5 Cam member 6 Base member 7 Cover member 8 Guide member 9 Elastic member 10 Elastic member 11 motors 12 pinion gear 13 photo interrupter 14 Gear member 15 CCD 16 CCD holding member 17 Shield member 18, 19 finder lens 20 Finder cover member
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｇ０３Ｂ 17/02 Ｈ０４Ｎ 5/225 Ｄ Ｈ０４Ｎ 5/225 Ｇ０２Ｂ 7/04 Ｄ Ｚ ─────────────────────────────────────────────────── ─── Continued Front Page (51) Int.Cl. 7 Identification Code FI Theme Coat (Reference) G03B 17/02 H04N 5/225 D H04N 5/225 G02B 7/04 D Z
Claims (4)
と、前記レンズ保持部材を光軸方向にガイドするための
複数のガイド構成部材と、前記レンズ保持部材を光軸方
向に移動させるカム部材と、前記カム部材を回動させる
駆動手段を備えたレンズ駆動装置であって、 前記カム部材は、前記レンズ保持部材のカム当接部と前
記カム当接部の略対称側で弾性的に光軸方向に付勢され
ると共に、前記ガイド構成部材の少なくとも１つによっ
て光軸方向の移動量を規制されていることを特徴とする
レンズ駆動装置。1. A lens holding member for holding a plurality of lenses, a plurality of guide constituent members for guiding the lens holding member in the optical axis direction, and a cam member for moving the lens holding member in the optical axis direction. A lens driving device having a driving means for rotating the cam member, wherein the cam member elastically elastically moves the optical axis at a cam contact portion of the lens holding member and a substantially symmetrical side of the cam contact portion. A lens driving device which is biased in a direction and whose movement amount in the optical axis direction is restricted by at least one of the guide constituting members.
イド構成部材には、前記駆動手段が取り付けられている
請求項１のレンズ駆動装置。2. The lens drive device according to claim 1, wherein the drive means is attached to at least one guide component member of the guide component portion.
ガイド構成部材には、前記カム部材の回転方向の位置検
出のための素子が取り付けられている請求項１のレンズ
駆動装置。3. The lens driving device according to claim 1, wherein an element for detecting the position of the cam member in the rotational direction is attached to at least one guide constituent member of the guide constituent members.
ガイド構成部材には、複数のファインダーレンズが組み
込まれていることを特徴とする請求項１のレンズ装置。4. The lens device according to claim 1, wherein a plurality of finder lenses are incorporated in at least one guide constituent member of the guide constituent members.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002030848A JP4181779B2 (en) | 2002-02-07 | 2002-02-07 | Lens drive device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002030848A JP4181779B2 (en) | 2002-02-07 | 2002-02-07 | Lens drive device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003232979A true JP2003232979A (en) | 2003-08-22 |
| JP4181779B2 JP4181779B2 (en) | 2008-11-19 |
Family
ID=27774439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002030848A Expired - Fee Related JP4181779B2 (en) | 2002-02-07 | 2002-02-07 | Lens drive device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4181779B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019117306A (en) * | 2017-12-27 | 2019-07-18 | 日本電産コパル株式会社 | Image capturing device |
-
2002
- 2002-02-07 JP JP2002030848A patent/JP4181779B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019117306A (en) * | 2017-12-27 | 2019-07-18 | 日本電産コパル株式会社 | Image capturing device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4181779B2 (en) | 2008-11-19 |
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