JP3313921B2 - Optical equipment - Google Patents
Optical equipmentInfo
- Publication number
- JP3313921B2 JP3313921B2 JP33593194A JP33593194A JP3313921B2 JP 3313921 B2 JP3313921 B2 JP 3313921B2 JP 33593194 A JP33593194 A JP 33593194A JP 33593194 A JP33593194 A JP 33593194A JP 3313921 B2 JP3313921 B2 JP 3313921B2
- Authority
- JP
- Japan
- Prior art keywords
- barrel
- guide
- elastic member
- movable
- lens
- 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.)
- Expired - Fee Related
Links
Landscapes
- Lens Barrels (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、焦点調節機能を有する
レンズ或いはズームレンズ等の移動鏡筒を有する光学機
器に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical apparatus having a movable lens barrel such as a lens or a zoom lens having a focusing function.
【０００２】[0002]
【従来の技術】従来、ズームレンズの倍率変換のレンズ
群或いは焦点調節用のレンズ群を精度よく移動させるた
めに、そのレンズ群を支持する移動鏡筒に設けたコロ
を、カム環のカム溝と案内筒の案内溝に嵌合し、カム環
或いは案内筒の回転により移動鏡筒を光軸方向に移動さ
せるレンズ鏡筒が知られている。2. Description of the Related Art Conventionally, in order to accurately move a lens group for zoom conversion or a lens group for focus adjustment of a zoom lens, a roller provided on a movable lens barrel supporting the lens group is provided with a cam groove of a cam ring. There is known a lens barrel that fits in a guide groove of a guide barrel and moves a movable barrel in an optical axis direction by rotation of a cam ring or a guide barrel.
【０００３】この様な構造のレンズ鏡筒では移動鏡筒と
案内筒の嵌合ガタがあるため、従来、嵌合ガタを低減す
るために、いずれか一方の筒を光軸と直交する垂直方向
に片寄させる部材を設けたレンズ鏡筒があった。In a lens barrel having such a structure, there is a play between the movable barrel and the guide tube. Conventionally, in order to reduce the play, one of the tubes is moved in a vertical direction perpendicular to the optical axis. There is a lens barrel provided with a member for biasing the lens barrel.
【０００４】また特開平５−８０２４３号公報に開示さ
れた光学機器によれば、移動鏡筒と案内筒間に嵌合ガタ
の発生を防止させるために、移動鏡筒をオーバーラップ
させ、その間に垂直方向に押圧力を発生させる弾性部材
を設けている。According to the optical apparatus disclosed in Japanese Patent Application Laid-Open No. 5-80243, the movable lens barrels are overlapped with each other in order to prevent occurrence of looseness between the movable lens barrel and the guide cylinder. An elastic member for generating a pressing force in the vertical direction is provided.
【０００５】[0005]
【発明が解決しようとしている課題】しかしながら上記
従来例においては、移動鏡筒のレンズの偏心敏感度が高
いと、嵌合のクリアランスがあるために、姿勢差によっ
て画質が悪化し、また移動鏡筒の移動中に像揺れが目立
つ等の問題点があった。However, in the above conventional example, if the eccentric sensitivity of the lens of the moving lens barrel is high, the image quality is deteriorated due to the difference in attitude due to the clearance of the fitting, and the moving lens barrel is also deteriorated. There is a problem that the image shake is conspicuous during the movement of the camera.
【０００６】また片寄させる部材を設けていても常に付
勢しているわけではないため、必ず嵌合ガタが残ってし
まうという問題点があった。[0006] Further, even if a member to be shifted is provided, it is not always biased, so that there is a problem that the fitting play is always left.
【０００７】また特開平５−８０２４３号公報に開示さ
れた光学機器のように、光軸と直交する垂直方向に押圧
力を発生させる弾性部材を周上に設け、摩擦力を加えた
ものにおいては、例えばモーター等のアクチュエーター
により移動鏡筒を移動させる場合、摺動部の摩擦が大き
いため、モーター出力の大きいものを用いる必要があ
り、光学機器自体の形状も大きくなり、またコストアッ
プの要因になるという問題点もあった。In an optical device disclosed in Japanese Patent Application Laid-Open No. 5-80243, an elastic member for generating a pressing force in a vertical direction perpendicular to the optical axis is provided on the periphery to apply a frictional force. For example, when the movable lens barrel is moved by an actuator such as a motor, since the friction of the sliding portion is large, it is necessary to use a motor with a large motor output, the shape of the optical device itself becomes large, and the cost increases. There was also a problem of becoming.
【０００８】本発明は上記のような問題点を解消するこ
とを課題になされたもので、小さな摩擦力によって、移
動鏡筒と案内筒との嵌合ガタを無くすることを目的とす
る。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to eliminate backlash between a movable lens barrel and a guide cylinder with a small frictional force.
【０００９】[0009]
【課題を解決するための手段】請求項１の発明の光学機
器は移動鏡筒と、カム溝を有するカム環と、案内溝を有
する案内筒と、前記カム溝と前記案内溝に嵌合し、前記
移動鏡筒に支持されたコロとを有し、前記カム環或いは
前記案内筒の回転により前記移動鏡筒を光軸方向に進退
させる光学機器において、前記光軸方向と直交する方向
に前記移動鏡筒と前記案内筒に対して付勢し、該案内筒
に接する突起部を有する弾性部材を、前記移動鏡筒の前
記コロの周囲に配設したことを特徴としている。According to a first aspect of the present invention, there is provided an optical apparatus which includes a movable lens barrel, a cam ring having a cam groove, a guide cylinder having a guide groove, and fitted in the cam groove and the guide groove. An optical device having a roller supported by the movable lens barrel and moving the movable lens barrel in the optical axis direction by rotation of the cam ring or the guide cylinder; An elastic member biasing the movable barrel and the guide barrel and having a protrusion contacting the guide barrel is provided around the roller of the movable barrel.
【００１０】請求項２の発明の光学機器は移動鏡筒と、
カム溝を有するカム環と、案内溝を有する案内筒と、前
記カム溝と前記案内溝に嵌合し、前記移動鏡筒に支持さ
れたコロとを有し、前記カム環或いは前記案内筒の回転
により前記移動鏡筒を光軸方向に進退させる光学機器に
おいて、前記案内筒に当接する第１突起部と、該第１突
起部と反対方向に回転止め用の第２突起部を有し前記光
軸方向と直交する方向に前記移動鏡筒を前記案内筒に対
して付勢する円環状の弾性部材と、前記円環状の弾性部
材を係合するための、前記移動鏡筒の前記コロの周囲に
設けられた円環状の凹部と、前記円環状の凹部内に設け
られ、前記弾性部材の前記第２突起部を係合する該弾性
部材の回転止め用の凹部とを有することを特徴としてい
る。An optical apparatus according to a second aspect of the present invention includes a movable lens barrel,
A cam ring having a cam groove, a guide cylinder having a guide groove, and a roller fitted in the cam groove and the guide groove and supported by the movable barrel; In an optical apparatus for rotating the movable barrel in the optical axis direction by rotation, the optical apparatus has a first projection abutting on the guide cylinder, and a second projection for stopping rotation in a direction opposite to the first projection. An annular elastic member that urges the movable barrel against the guide barrel in a direction perpendicular to the optical axis direction, and an engagement between the annular elastic member and the roller of the movable barrel. An annular concave portion provided around the peripheral portion; and a concave portion provided in the annular concave portion for stopping rotation of the elastic member, which engages the second protrusion of the elastic member. I have.
【００１１】請求項３の発明は請求項１または２の発明
において前記弾性部材は合成樹脂で形成されていること
を特徴としている。According to a third aspect of the present invention, in the first or second aspect, the elastic member is formed of a synthetic resin.
【００１２】請求項４の発明は請求項１または２の発明
において前記弾性部材は金属で形成されていることを特
徴としている。According to a fourth aspect of the present invention, in the first or second aspect, the elastic member is formed of metal.
【００１３】請求項５の発明は請求項１または２の発明
において前記移動鏡筒には該移動鏡筒に支持されるレン
ズ鏡筒が偏心調整可能に固定されたことを特徴としてい
る。According to a fifth aspect of the present invention, in the first or second aspect of the present invention, a lens barrel supported by the movable barrel is fixed to the movable barrel so that eccentricity can be adjusted.
【００１４】[0014]
【００１５】[0015]
【００１６】[0016]
実施例１．以下、本発明を図面に示す実施例に基づいて
詳細に説明する。Embodiment 1 FIG. Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.
【００１７】図１は本発明の実施例１による光学機器の
一つである一眼レフカメラ用の単焦点のレンズ鏡筒の断
面図であり、図２は図１のＡ部の拡大詳細図である。FIG. 1 is a cross-sectional view of a single focus lens barrel for a single-lens reflex camera, which is one of the optical apparatuses according to the first embodiment of the present invention, and FIG. 2 is an enlarged detailed view of a portion A in FIG. is there.
【００１８】Ｌ１〜Ｌ４はそれぞれ１群〜４群レンズを
表しており、１群レンズＬ１は固定群、２群〜４群レン
ズＬ２〜Ｌ４はフォーカシング群であり、無限から至近
距離に焦点調節を行うときに全体的に物体側へ移動す
る。３群レンズＬ３はフローティングレンズ群であり、
２群・４群レンズＬ２・Ｌ４に対してフォーカシングに
よる光軸方向の移動量が大きい。L1 to L4 denote first to fourth group lenses, respectively. The first lens L1 is a fixed group, the second to fourth lens L2 to L4 is a focusing group, and focuses from infinity to a close distance. When performing, it moves to the object side as a whole. The third lens unit L3 is a floating lens unit,
The amount of movement in the optical axis direction by focusing with respect to the second / fourth lens L2 / L4 is large.
【００１９】１は周上に２種類のカムが形成されたカム
環であり、第１のカム２０は２群・４群レンズＬ２，Ｌ
４を光軸方向に移動するためであり、第２のカム１９は
３群レンズＬ３を光軸方向に移動させるためである。Reference numeral 1 denotes a cam ring in which two types of cams are formed on the circumference, and the first cam 20 includes a second group / fourth group lens L2, L
The second cam 19 is for moving the third group lens L3 in the optical axis direction.
【００２０】２は案内筒であり、後部は４群レンズＬ４
の鏡筒部分になっているとともにコロ１２が嵌合する光
軸方向に形成された案内溝１８が設けられている。３は
２群レンズＬ２の鏡筒であり、４群レンズＬ４と一体的
に移動するために案内筒２に固定されている。Reference numeral 2 denotes a guide cylinder, and a rear part is a fourth group lens L4.
And a guide groove 18 formed in the optical axis direction in which the roller 12 fits. Reference numeral 3 denotes a lens barrel of the second group lens L2, which is fixed to the guide cylinder 2 so as to move integrally with the fourth group lens L4.
【００２１】４は移動鏡筒としての３群ベース鏡筒であ
り、外周に３箇所のコロ座となる凹部２３が設けられて
おり、その内の１箇所のコロ座の周囲に弾性部材１３の
係合するための円環状の凹部２１が設けられている。Reference numeral 4 denotes a third-group base lens barrel as a movable lens barrel, which is provided with three concave portions 23 serving as roller seats on the outer periphery, and an elastic member 13 around one roller seat among them. An annular recess 21 for engagement is provided.
【００２２】５は３群ベース鏡筒４に固定されている３
群鏡筒であり、この３群鏡筒５は３群ベース鏡筒４に固
定される前に偏心移動できるようになっており、偏心調
整手段として機能する。６は不図示の駆動部により駆動
される絞り機構であり、案内筒２に取付けられている。Reference numeral 5 denotes a lens 3 fixed to the third lens barrel 4.
This is a group lens barrel, and this third lens group barrel 5 can be eccentrically moved before being fixed to the third lens group base lens barrel 4, and functions as eccentricity adjusting means. Reference numeral 6 denotes a stop mechanism driven by a drive unit (not shown), which is attached to the guide cylinder 2.
【００２３】７は例えば特開平２−２５３２１号公報に
示されたＡＦ駆動用のアクチュエーターを表してあり、
フォーカスキー９の光軸中心の回転がアクチュエーター
７の出力となって現れる。８はフォーカスキー９を回転
できる構造となっているマニュアルリングである。Reference numeral 7 denotes an AF driving actuator disclosed in, for example, JP-A-2-25321.
The rotation of the focus key 9 about the optical axis appears as an output of the actuator 7. Reference numeral 8 denotes a manual ring having a structure in which the focus key 9 can be rotated.
【００２４】１０は案内筒２に固定されたフォーカスビ
スであり、カム環１の第１のカム溝２０とフォーカスキ
ー９に嵌合している。１１はビスによって案内筒２に固
定されている第１のコロであり、このコロ１１はフォー
カスビス１０と同じように第１のカム溝２０に嵌合して
いる。１２は第２のカム溝１９と案内溝１８に嵌合して
いる第２のコロであり、このコロ１２は３群ベース鏡筒
４にビス１７で固定されている。Reference numeral 10 denotes a focus screw fixed to the guide cylinder 2, which is fitted into the first cam groove 20 of the cam ring 1 and the focus key 9. Reference numeral 11 denotes a first roller fixed to the guide cylinder 2 by a screw, and this roller 11 is fitted in the first cam groove 20 in the same manner as the focus screw 10. Reference numeral 12 denotes a second roller fitted in the second cam groove 19 and the guide groove 18, and the roller 12 is fixed to the third-group base barrel 4 with screws 17.
【００２５】なお、上記第１、第２のカム溝２０，１９
は周方向に等分に３箇所形成され、また、フォーカスビ
ス１０と２つのコロ１１も同様に等分に案内筒２に固定
され、３つのコロ１２も同様に等分に３群ベース鏡筒４
に固定されている。The first and second cam grooves 20, 19
Are formed equally at three places in the circumferential direction, the focus screw 10 and the two rollers 11 are similarly fixed to the guide tube 2 equally, and the three rollers 12 are equally equally divided into the three-group base lens barrel. 4
It is fixed to.
【００２６】１４は実装基板であり、この基板１４上に
はアクチュエーターの駆動用のＩＣ等が載っている。１
５はカメラ本体１００と接続されるためのマウント、１
６はカメラ本体１００との間で電気的通信を行うための
接点ブロックである。Reference numeral 14 denotes a mounting board, on which an IC for driving an actuator and the like are mounted. 1
5 is a mount for connecting to the camera body 100, 1
Reference numeral 6 denotes a contact block for performing electrical communication with the camera body 100.
【００２７】図３は図１のＢ−Ｂ線に層一部の拡大断面
図、図４は図１のＡ部近傍の分解斜視図である。１３は
ＰＯＭ等の合成樹脂で形成され、かつ、光軸と直交する
方向Ｙを中心とする円環形状をした弾性部材であり、突
起部２５と２６を設けた２辺１３ａ，１３ｂ間は弾性的
にＹ方向に変位可能である。FIG. 3 is an enlarged sectional view of a part of the layer taken along line BB of FIG. 1, and FIG. 4 is an exploded perspective view of the vicinity of the portion A in FIG. 13 is made of a synthetic resin such as POM, and you orthogonal to the optical axis
An elastic member in the annular shape around the rectangular direction Y, 2 sides 13a provided with projections 25 and 26, between 13b is resiliently displaceable in the Y direction.
【００２８】従って、この変位量により弾性力を変化さ
せることは容易にでき、また、移動鏡筒の重量に応じて
弾性力を変えることも容易にできる。上記突起部２５は
３群ベース鏡筒４に設けられた円環状凹部２１内の凹部
２２に係合するように形成されているため、弾性部材１
３は垂直方向Ｙを中心に回転することはない。このこと
により、弾性力の作用点である上記突起部２６が案内溝
１８に落ち込むことを防ぐことができる。また、案内筒
２と３群ベース鏡筒４との嵌合ガタはコロ１２を中心に
対称位置の弾性部材１３の突起部２６、２６で付勢する
ため、案内筒２と３群ベース鏡筒４との嵌合ガタは、詰
まる。このとき、案内筒２に対する弾性部材１３の弾性
力の作用点は、突起部２６、２６と接触する案内筒２の
個所と、この弾性部材１３を配置した位置のコロ１２と
は別の個所の周囲に弾性部材を配置していないコロの個
所である。Therefore, it is easy to change the elastic force according to the displacement amount, and it is also possible to easily change the elastic force according to the weight of the movable lens barrel. Since the projection 25 is formed to engage with the concave portion 22 in the annular concave portion 21 provided in the third-group base barrel 4, the elastic member 1
3 does not rotate around the vertical direction Y. As a result, it is possible to prevent the projection 26, which is the point of application of the elastic force, from falling into the guide groove 18. Further, since the fitting play between the guide cylinder 2 and the third group base lens barrel 4 is urged by the protrusions 26, 26 of the elastic member 13 symmetrically positioned about the roller 12, the guide cylinder 2 and the third group base lens barrel 4 are urged. The looseness of fitting with 4 is clogged. At this time, the point of action of the elastic force of the elastic member 13 on the guide cylinder 2 is different between the position of the guide cylinder 2 in contact with the protrusions 26 and 26 and the roller 12 at the position where the elastic member 13 is arranged. This is the location of the roller where no elastic member is disposed around.
【００２９】上記の構成により、片寄方向は常に一定で
あるため、移動鏡筒内のレンズを偏心調整すれば、敏感
度の高いレンズでも移動させることが可能となる。According to the above configuration, since the one-sided direction is always constant, by adjusting the eccentricity of the lens in the movable lens barrel, it is possible to move even a lens with high sensitivity.
【００３０】実施例２．図５は本発明の実施例２を示す
弾性部材１３の斜視図であり、金属の板材をリング状に
プレス成形して、そのＸ，Ｙ軸線上において互いに逆方
向に突起部３０，３１を設けたもので、この構成によ
り、図４の弾性部材１３と同様の効果を得ることができ
る。この突起部３１は突起部３０と同位相には形成でき
ないため、３群ベース鏡筒４側の凹部２２の位相も突起
部３１と同位相に設ければ良い。Embodiment 2 FIG. FIG. 5 is a perspective view of an elastic member 13 showing a second embodiment of the present invention, in which a metal plate is press-formed into a ring shape, and projections 30 and 31 are provided in opposite directions on the X and Y axes. With this configuration, the same effect as the elastic member 13 in FIG. 4 can be obtained. Since the projection 31 cannot be formed in the same phase as the projection 30, the phase of the concave portion 22 on the third-group base barrel 4 side may be provided in the same phase as the projection 31.
【００３１】尚、上記の各実施例は、レンズ駆動用アク
チュエーターをカメラ内に有した交換レンズシステムの
カメラにも適用でき、また一眼レフカメラ用交換レンズ
以外の、ビデオレンズ、プロジェクタ用レンズ鏡筒等の
光学機器についても適用することもできる。Each of the above embodiments can also be applied to a camera of an interchangeable lens system having a lens driving actuator in the camera, and a video lens and a lens barrel for a projector other than an interchangeable lens for a single-lens reflex camera. It can also be applied to optical devices such as.
【００３２】[0032]
【発明の効果】請求項１の発明によれば、移動筒と案内
筒の両筒間の嵌合ガタを無くすことができ、また摩擦力
を少なくすることもできる。このため、アクチュエータ
ーで移動させる場合において負荷が極端に大きくなるこ
とはないという光学機器を達成することができる。According to the first aspect of the present invention, it is possible to eliminate the backlash between the movable cylinder and the guide cylinder, and to reduce the frictional force. For this reason, it is possible to achieve an optical device in which the load does not become extremely large when moving with an actuator.
【００３３】請求項２の発明によれば、点接触で付勢
し、安定した付勢力を得ることができるとともに移動鏡
筒に支持されやすくできる。又弾性部材の突起部がカム
溝或いは案内溝に落ち込まないように該弾性部材の回
転、移動を規制することができるという効果を有する光
学機器を達成することができる。According to the second aspect of the present invention, it is possible to obtain a stable urging force by being urged by point contact and to be easily supported by the movable lens barrel. Further, it is possible to achieve an optical apparatus having an effect that the rotation and movement of the elastic member can be regulated so that the protrusion of the elastic member does not fall into the cam groove or the guide groove.
【００３４】請求項３或いは４記載の発明によれば、摩
擦抵抗を更に減少させることもでき、コストの低減或い
は耐久性の向上を図ることができる。According to the third or fourth aspect of the present invention, the frictional resistance can be further reduced, and the cost can be reduced or the durability can be improved.
【００３５】請求項５記載の発明によれば、レンズの敏
感度が高い場合でも、移動鏡筒を付勢するために起こる
レンズの偏心ズレによる画質の悪化を補正できる。この
ため、姿勢差による画質の悪化を防ぐことができると共
に敏感度の高いレンズを移動させることも可能となり設
計の自由度も増す等の効果が得られる。According to the fifth aspect of the invention, even when the sensitivity of the lens is high, it is possible to correct the deterioration of the image quality due to the eccentric displacement of the lens caused by urging the movable lens barrel. Therefore, it is possible to prevent the image quality from deteriorating due to the posture difference and to move the lens with high sensitivity, thereby obtaining effects such as an increase in design freedom.
【００３６】[0036]
【００３７】[0037]
【図１】図１は本発明の実施例１を示す光学機器の１つ
である一眼レフカメラ用の単焦点のレンズ鏡筒の断面
図。FIG. 1 is a cross-sectional view of a single-focus lens barrel for a single-lens reflex camera, which is one of optical apparatuses according to a first embodiment of the present invention.
【図２】図２は図１のＡ部の拡大詳細図。FIG. 2 is an enlarged detailed view of a portion A in FIG. 1;
【図３】図３は図１のＢ−Ｂに沿う一部の拡大断面図。FIG. 3 is an enlarged cross-sectional view of a part along the line BB in FIG. 1;
【図４】図４は弾性部材の斜視図。FIG. 4 is a perspective view of an elastic member.
【図５】図５は本発明の実施例２を示す弾性部材の斜視
図。FIG. 5 is a perspective view of an elastic member according to a second embodiment of the present invention.
１ カム環 ２ 案内筒 ４ ３群ベース鏡筒（移動鏡筒） ５ ３群鏡筒（偏心調整手段） １２ コロ １３ 弾性部材 １８ 案内溝 １９ カム溝 DESCRIPTION OF SYMBOLS 1 Cam ring 2 Guide cylinder 4 3rd group base barrel (moving barrel) 5 3rd group barrel (eccentricity adjusting means) 12 Roller 13 Elastic member 18 Guide groove 19 Cam groove
フロントページの続き (56)参考文献 特開 昭61−32018（ＪＰ，Ａ) 特開 昭58−118612（ＪＰ，Ａ) 特開 平２−73316（ＪＰ，Ａ) 特開 平８−122607（ＪＰ，Ａ) 特開 昭59−87414（ＪＰ，Ａ) 特開 昭58−111908（ＪＰ，Ａ) 実開 平２−58713（ＪＰ，Ｕ) 実開 昭60−92216（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) G02B 7/02 - 7/105 Continuation of front page (56) References JP-A-61-32018 (JP, A) JP-A-58-118612 (JP, A) JP-A-2-73316 (JP, A) JP-A-8-122607 (JP) JP-A-59-87414 (JP, A) JP-A-58-111908 (JP, A) JP-A-2-58713 (JP, U) JP-A-60-92216 (JP, U) (58) Field surveyed (Int.Cl. 7 , DB name) G02B 7 /02-7/105
Claims (5)
案内溝を有する案内筒と、前記カム溝と前記案内溝に嵌
合し、前記移動鏡筒に支持されたコロとを有し、前記カ
ム環或いは前記案内筒の回転により前記移動鏡筒を光軸
方向に進退させる光学機器において、 前記光軸方向と直交する方向に前記移動鏡筒と前記案内
筒に対して付勢し、該案内筒に接する突起部を有する弾
性部材を、前記移動鏡筒の前記コロの周囲に配設したこ
とを特徴とする光学機器。A movable lens barrel, a cam ring having a cam groove,
A guide tube having a guide groove, and a roller fitted in the cam groove and the guide groove and supported by the moving barrel, and rotating the cam ring or the guide barrel to light the movable barrel. In an optical apparatus for moving forward and backward in the axial direction, an elastic member having a projection that urges the movable barrel and the guide barrel in a direction orthogonal to the optical axis direction and has a protrusion that contacts the guide barrel is provided. An optical device, wherein the optical device is disposed around the roller.
案内溝を有する案内筒と、前記カム溝と前記案内溝に嵌
合し、前記移動鏡筒に支持されたコロとを有し、前記カ
ム環或いは前記案内筒の回転により前記移動鏡筒を光軸
方向に進退させる光学機器において、 前記案内筒に当接する第１突起部と、該第１突起部と反
対方向に回転止め用の第２突起部を有し前記光軸方向と
直交する方向に前記移動鏡筒を前記案内筒に対して付勢
する円環状の弾性部材と、 前記円環状の弾性部材を係合するための、前記移動鏡筒
の前記コロの周囲に設けられた円環状の凹部と、 前記円環状の凹部内に設けられ、前記弾性部材の前記第
２突起部を係合する該弾性部材の回転止め用の凹部とを
有することを特徴とする光学機器。2. A moving lens barrel, a cam ring having a cam groove,
A guide tube having a guide groove, and a roller fitted in the cam groove and the guide groove and supported by the moving barrel, and rotating the cam ring or the guide barrel to light the movable barrel. In an optical device for moving forward and backward in the axial direction, the optical device has a first protrusion abutting on the guide cylinder, and a second protrusion for stopping rotation in a direction opposite to the first protrusion in a direction orthogonal to the optical axis direction. An annular elastic member for urging the movable barrel against the guide barrel; and an annular annular member provided around the roller of the movable barrel for engaging the annular elastic member. An optical apparatus, comprising: a concave portion; and a concave portion provided in the annular concave portion, the concave portion for engaging the second protrusion of the elastic member to prevent rotation of the elastic member.
ることを特徴とする請求項１または２の光学機器。3. The optical device according to claim 1, wherein the elastic member is formed of a synthetic resin.
とを特徴とする請求項１または２の光学機器。4. The optical device according to claim 1, wherein the elastic member is formed of a metal.
るレンズ鏡筒が偏心調整可能に固定されたことを特徴と
する請求項１または２の光学機器。5. The optical apparatus according to claim 1, wherein a lens barrel supported by the movable barrel is fixed to the movable barrel so that eccentricity can be adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33593194A JP3313921B2 (en) | 1994-12-21 | 1994-12-21 | Optical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33593194A JP3313921B2 (en) | 1994-12-21 | 1994-12-21 | Optical equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08179182A JPH08179182A (en) | 1996-07-12 |
| JP3313921B2 true JP3313921B2 (en) | 2002-08-12 |
Family
ID=18293954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33593194A Expired - Fee Related JP3313921B2 (en) | 1994-12-21 | 1994-12-21 | Optical equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3313921B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4599198B2 (en) * | 2005-03-14 | 2010-12-15 | キヤノン株式会社 | Lens holding unit |
| JP2008033167A (en) * | 2006-07-31 | 2008-02-14 | Olympus Medical Systems Corp | Imaging unit |
-
1994
- 1994-12-21 JP JP33593194A patent/JP3313921B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08179182A (en) | 1996-07-12 |
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