JP2002090609A - Lens barrel device - Google Patents
Lens barrel deviceInfo
- Publication number
- JP2002090609A JP2002090609A JP2000276951A JP2000276951A JP2002090609A JP 2002090609 A JP2002090609 A JP 2002090609A JP 2000276951 A JP2000276951 A JP 2000276951A JP 2000276951 A JP2000276951 A JP 2000276951A JP 2002090609 A JP2002090609 A JP 2002090609A
- Authority
- JP
- Japan
- Prior art keywords
- frame
- group
- moving
- cam
- 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.)
- Withdrawn
Links
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- Lens Barrels (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、進退駆動可能な移
動枠を有する鏡筒装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens barrel having a movable frame which can be driven forward and backward.
【０００２】[0002]
【従来の技術】従来、カムフォロアを適用するレンズ鏡
筒の進退構造に関してとして実開昭６１−１９０５１５
号公報に開示されたズームレンズ鏡筒は、カムフォロア
を介してレンズ保持枠が進退駆動される鏡筒である。上
記レンズ保持枠には外径寸法が３つのカムフォロア位置
とともに調節可能になっている。そして、上記レンズ保
持枠は、カムフォロアが摺動自在に嵌入するカム溝をも
つ枠体、さらに、カム筒に回転可能に嵌入される。2. Description of the Related Art Conventionally, as a reciprocating structure of a lens barrel to which a cam follower is applied, Japanese Utility Model Laid-Open No. 61-190515 has been proposed.
The zoom lens barrel disclosed in Japanese Patent Application Laid-Open Publication No. H11-163456 is a barrel in which a lens holding frame is driven forward and backward via a cam follower. The outer diameter of the lens holding frame is adjustable along with the three cam follower positions. The lens holding frame is rotatably fitted into a frame having a cam groove into which a cam follower is slidably fitted, and further into a cam cylinder.
【０００３】[0003]
【発明が解決しようとする課題】上述の実開昭６１−１
９０５１５号に開示されたズームレンズ鏡筒において
は、レンズ保持枠の外径寸法がカムフォロア位置ととも
に調節されることから、上記カムフォロアの調節位置に
よりレンズ保持枠の中心がずれる。したがって、上記枠
体やカム筒に対してレンズ保持枠中心となるレンズ中心
がずれ、光学性能に悪影響を与える可能性があった。Problems to be Solved by the Invention
In the zoom lens barrel disclosed in Japanese Patent No. 90515, since the outer diameter of the lens holding frame is adjusted together with the position of the cam follower, the center of the lens holding frame is shifted by the adjustment position of the cam follower. Therefore, the center of the lens, which is the center of the lens holding frame, is shifted with respect to the frame or the cam barrel, and there is a possibility that the optical performance is adversely affected.
【０００４】本発明は、上述した不具合を解決するため
になされたものであって、組み立て性がよく、枠部材の
芯ずれが少なく、精度の高い鏡筒装置を提供することを
目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has as its object to provide a highly accurate lens barrel device which has good assemblability, has little misalignment of a frame member, and has high accuracy.
【０００５】[0005]
【課題を解決するための手段】本発明の請求項１記載の
鏡筒装置は、移動枠と、上記移動枠を移動させるための
カムフォロアと、上記複数のカムフォロアと一体的に上
記移動枠の移動方向と直交する平面内で移動可能な相対
移動部材とを有しており、上記相対移動部材に一体であ
る上記カムフォロアを介して上記移動枠が移動する。According to a first aspect of the present invention, there is provided a lens barrel apparatus comprising: a moving frame; a cam follower for moving the moving frame; and a movement of the moving frame integrally with the plurality of cam followers. A relative moving member movable in a plane perpendicular to the direction, and the moving frame moves via the cam follower integrated with the relative moving member.
【０００６】本発明の請求項２記載の鏡筒装置は、移動
枠と、上記移動枠を移動させるためのカムフォロアと、
上記カムフォロアを一体的に支持する支持部材と、上記
移動枠に対して上記移動枠の移動方向と直交する平面内
で相対的移動を可能とするように上記支持部材を移動可
能とさせるため、上記支持部材と上記移動枠とで構成さ
れる相対移動機構とを有しており、上記相対移動機構を
介した状態で上記支持部材と上記移動枠を相対移動させ
る。According to a second aspect of the present invention, there is provided a lens barrel device comprising: a moving frame; a cam follower for moving the moving frame;
A support member that integrally supports the cam follower, and a movable member that allows the support member to move relative to the moving frame in a plane perpendicular to the moving direction of the moving frame. There is a relative moving mechanism composed of a supporting member and the moving frame. The relative moving mechanism moves the supporting member and the moving frame relatively via the relative moving mechanism.
【０００７】本発明の請求項３記載の鏡筒装置は、移動
枠と、上記移動枠を移動させるためのカムフォロアと、
上記カムフォロアが係合摺接するカム溝を有するカム部
材と、上記カムフォロアを支持する支持部材と、上記カ
ムフォロアが上記カム溝と係合して決定される上記移動
枠の移動方向と直交する平面内の上記支持部材の位置
と、他の枠との嵌合で決定される上記移動枠の移動方向
と直交する平面内の上記移動枠の位置との相対位置が自
在となるように、上記移動枠と上記支持部材との相対移
動を可能とさせるための相対移動手段とを有しており、
上記相対移動手段を介した状態で上記支持部材と上記移
動枠を相対移動させる。According to a third aspect of the present invention, there is provided a lens barrel device comprising: a moving frame; a cam follower for moving the moving frame;
A cam member having a cam groove with which the cam follower engages and slides, a support member for supporting the cam follower, and a plane perpendicular to the moving direction of the moving frame determined by the cam follower engaging with the cam groove. The position of the support member and the position of the moving frame in a plane orthogonal to the moving direction of the moving frame determined by fitting with another frame are free relative positions, so that the moving frame Relative movement means for allowing relative movement with the support member,
The support member and the moving frame are relatively moved with the relative moving means interposed therebetween.
【０００８】本発明の請求項４記載の鏡筒装置は、移動
枠と、上記移動枠を移動させるためのカムフォロアと、
上記カムフォロアを支持し、上記移動の方向では上記移
動枠と一体的に移動する支持部材と、上記カムフォロア
が係合摺接するカム溝を有するカム部材と、上記カムフ
ォロアが上記カム部材の上記カム溝と係合して上記移動
枠を上記移動の方向に移動させるため、上記カム溝と協
同して上記支持部材を上記移動の方向に移動させる案内
部材と、上記移動の方向と直交する平面内における上記
支持部材の位置と上記移動の方向と直交する平面内にお
ける上記移動枠の位置との相対位置を自在に決定可能な
ように上記移動枠と上記支持部材との相対的移動可能と
させるための相対移動手段とを有しており、上記相対移
動手段を介した状態で上記支持部材と上記移動枠を相対
移動させる。According to a fourth aspect of the present invention, there is provided a lens barrel device comprising: a moving frame; a cam follower for moving the moving frame;
A support member that supports the cam follower and moves integrally with the moving frame in the direction of the movement, a cam member having a cam groove with which the cam follower engages and slides, and the cam follower has the cam groove of the cam member. In order to engage and move the moving frame in the direction of the movement, a guide member for moving the support member in the direction of the movement in cooperation with the cam groove, and the guide member in a plane orthogonal to the direction of the movement. A relative position for enabling relative movement between the moving frame and the support member so that the relative position between the position of the supporting member and the position of the moving frame in a plane orthogonal to the direction of the movement can be freely determined. And a moving means for relatively moving the support member and the moving frame via the relative moving means.
【０００９】[0009]
【発明の実施の形態】以下、本発明の実施の形態を図に
基づいて説明する。図１〜３は、本発明の一実施形態の
鏡筒装置であるズームレンズ鏡筒の分解斜視図である。
図４は、上記ズームレンズ鏡筒の鏡枠繰り出し状態にお
ける縦断面図である。図５は、上記ズームレンズ鏡筒の
第１群枠と第２群枠の嵌合状態を示す光軸直交断面図で
あり、図６は、上記第１群枠と第２群枠の収納状態での
舌片部解放状態を示す部分拡大図である。図７は、ガイ
ド枠連結環の嵌合状態を示す拡大部分断面図であり、図
８は、保持枠連結環周りの嵌合状態を示す拡大部分断面
図である。なお、ズームレンズ鏡筒の説明において、被
写体側を前方、結像面側を後方とし、回転方向は、被写
体側から見たときの回転方向で示すものとする。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 are exploded perspective views of a zoom lens barrel which is a lens barrel device according to an embodiment of the present invention.
FIG. 4 is a longitudinal sectional view of the zoom lens barrel in a state in which the lens barrel is extended. FIG. 5 is a cross-sectional view orthogonal to the optical axis showing a fitted state of the first group frame and the second group frame of the zoom lens barrel, and FIG. 6 is a storage state of the first group frame and the second group frame. FIG. 4 is a partially enlarged view showing a released state of the tongue piece. FIG. 7 is an enlarged partial sectional view showing a fitted state of the guide frame connecting ring, and FIG. 8 is an enlarged partial sectional view showing a fitted state around the holding frame connecting ring. In the description of the zoom lens barrel, the subject side is defined as the front and the image forming surface side is defined as the rear, and the rotation direction is indicated by the rotation direction as viewed from the subject side.
【００１０】上記実施形態のズームレンズ鏡筒１は、図
１〜３に示すように主にカメラ本体等に固定支持される
固定枠２と、固定枠２に回転可能に支持される駆動環３
と、駆動環３とともに回転しながら進退駆動される回転
環４と、回転環４とともに回転しながら進退駆動される
カム部材であるカム環５と、カム環５を介して回転する
ことなく進退駆動される枠部材であって第１群枠６、移
動枠である第２群ガイド枠９、および、移動枠である第
３群枠８と、図示しないフォーカス機構を介して進退駆
動される案内部材（直進筒）としての第２群枠７と、固
定枠２により直進ガイドされる直進リング１３と、直進
ガイドされる案内部材としての直進キーリング１４と、
上記第２群ガイド枠９に連結される支持部材（相対移動
手段）としての第２群ガイド枠連結環１０と、上記第３
群枠８に連結される支持部材（相対移動手段）としての
第３群枠連結環１１と、第１群枠６に保持される第１群
レンズ４１と、第２群枠７に保持される第２群レンズ４
２と、第３群枠８に保持される第３群レンズ４３とを有
してなる。As shown in FIGS. 1 to 3, the zoom lens barrel 1 of the above embodiment mainly includes a fixed frame 2 fixedly supported by a camera body and the like, and a drive ring 3 rotatably supported by the fixed frame 2.
A rotating ring 4 that is driven forward and backward while rotating with the driving ring 3, a cam ring 5 that is a cam member that is driven forward and backward while rotating with the rotating ring 4, and a forward and backward driving without rotating via the cam ring 5. A first group frame 6, a second group guide frame 9 as a moving frame, and a third group frame 8 as a moving frame, and a guide member driven forward and backward through a focus mechanism (not shown). A second group frame 7 as a (straight cylinder), a straight ring 13 guided straight by the fixed frame 2, a straight key ring 14 as a guide member guided straight,
A second group guide frame connecting ring 10 as a support member (relative moving means) connected to the second group guide frame 9;
A third group frame connecting ring 11 as a support member (relative moving means) connected to the group frame 8, a first group lens 41 held by the first group frame 6, and held by the second group frame 7. Second lens group 4
2 and a third group lens 43 held by the third group frame 8.
【００１１】上記固定枠２は、円環状の部材であって、
その内周面に直進溝２ａと、光軸Ｏに対して斜行するカ
ム溝２ｂと、前方端部に径方向に弾性変形可能な駆動環
保持用爪２ｃとが設けられている。The fixed frame 2 is an annular member,
The inner peripheral surface is provided with a rectilinear groove 2a, a cam groove 2b oblique to the optical axis O, and a driving ring holding claw 2c which is elastically deformable in a radial direction at a front end.
【００１２】上記駆動環３は、円環状の部材であって、
その外周に駆動ギヤ３ａと、円環部に光軸Ｏと平行な直
進溝３ｂが設けられている。The drive ring 3 is an annular member,
A drive gear 3a is provided on the outer periphery thereof, and a rectilinear groove 3b parallel to the optical axis O is provided on the annular portion.
【００１３】この駆動環３は、上記保持用爪２ｃを変形
させながら固定枠２の外周に嵌入され、上記保持用爪２
ｃにより軸方向の移動が規制された状態で固定枠２に回
転可能な状態で保持される。The driving ring 3 is fitted on the outer periphery of the fixed frame 2 while deforming the holding claw 2c.
In a state where the movement in the axial direction is restricted by c, it is rotatably held by the fixed frame 2.
【００１４】上記回転環４は、円環状の部材であって、
後方部外周にカムフォロア４ａが固着され、後方開口側
に内周縁部４ｃと、内周面４ｆに光軸Ｏと平行な直進溝
４ｄおよび光軸Ｏに対して斜行するカム溝４ｅとが設け
られている。The rotary ring 4 is an annular member,
A cam follower 4a is fixed to the outer periphery of the rear portion, an inner peripheral edge 4c is provided on the rear opening side, and a straight groove 4d parallel to the optical axis O and a cam groove 4e oblique to the optical axis O are provided on the inner peripheral surface 4f. Have been.
【００１５】この回転環４は、カムフォロア４ａを固定
枠２のカム溝２ｂおよび駆動環３の直進溝３ｂに嵌入し
た状態で固定枠２の内周面２ｄに嵌合しており、駆動環
３の回転により回転、かつ、光軸Ｏ方向に進退駆動され
る。The rotary ring 4 is fitted on the inner peripheral surface 2d of the fixed frame 2 with the cam follower 4a fitted in the cam groove 2b of the fixed frame 2 and the rectilinear groove 3b of the drive ring 3. , And is driven forward and backward in the direction of the optical axis O.
【００１６】上記直進リング１３は、円板状部材であっ
て、外周部１３ｂと、段部１３ａと、ビス穴１３ｃと、
このリングを切り欠いた切り欠き部１３ｄとを有する。
また、上記直進キー１２は、突起部１２ｂを有する起立
部と真直な直進キー部とを持つＬ字形状の板部材であ
る。The rectilinear ring 13 is a disk-shaped member, and has an outer peripheral portion 13b, a step portion 13a, a screw hole 13c,
This ring has a cutout portion 13d.
The straight key 12 is an L-shaped plate member having an upright portion having a protruding portion 12b and a straight straight key portion.
【００１７】この直進キー１２は、直進リング１３に対
してビス穴１３ｃに挿通したビス１５をねじ穴１２ａに
螺着して固着される。その固着時に直進リング１３の外
周１３ｂを回転環４の内周後端部の内面４ｆに設けた溝
４ｃにその直径を弾性変化させて挿入し、回転摺動自在
に取り付ける。The straight key 12 is fixed to the straight ring 13 by screwing a screw 15 inserted through a screw hole 13c into a screw hole 12a. At the time of fixing, the outer circumference 13b of the rectilinear ring 13 is inserted into a groove 4c provided on the inner surface 4f of the inner peripheral rear end of the rotating ring 4 with its diameter changed elastically, and is mounted so as to be rotatable and slidable.
【００１８】上記取り付け状態で直進リング１３は、回
転環４に対して光軸Ｏ方向に一体であり、回転可能状態
で支持される。また、直進キー１２は、光軸Ｏと平行に
前方に向けて延出した状態に保持される。そして、上記
直進リング１３の直進キー１２の突起部１２ｂが固定枠
２の直進溝２ａに摺動自在に嵌入しているので、直進キ
ー１２は、回転が規制された状態で光軸Ｏ方向に進退駆
動されることになる。In the mounted state, the rectilinear ring 13 is integral with the rotating ring 4 in the direction of the optical axis O, and is supported in a rotatable state. The rectilinear key 12 is held in a state of extending forward in parallel with the optical axis O. Since the projection 12b of the rectilinear key 12 of the rectilinear ring 13 is slidably fitted in the rectilinear groove 2a of the fixed frame 2, the rectilinear key 12 is moved in the direction of the optical axis O in a state where the rotation is restricted. It will be driven forward and backward.
【００１９】上記カム環５は、円環状の部材であって、
後方部外周に３つのカムフォロア５ａが固着され、後方
開口側に内周溝５ｂと、内周面５ｇ上に光軸Ｏに対して
斜行するカム溝５ｄ，５ｅ，５ｆとが設けられている。
なお、カム溝５ｄ，５ｅ，５ｆは、それぞれの溝端部が
カム環外方に通じる単一の挿通溝（図示せず）に連結さ
れており、上記各カム溝に嵌入される各カムフォロア
は、上記挿通溝を介して対応するカム溝に挿入可能であ
る。The cam ring 5 is an annular member,
Three cam followers 5a are fixed to the outer periphery of the rear portion, and an inner peripheral groove 5b is provided on the rear opening side, and cam grooves 5d, 5e, 5f oblique to the optical axis O are provided on the inner peripheral surface 5g. .
Each of the cam grooves 5d, 5e, and 5f is connected to a single insertion groove (not shown) that has a groove end communicating with the outer side of the cam ring. It can be inserted into the corresponding cam groove via the insertion groove.
【００２０】上記直進キーリング１４は、リング外周面
１４ｆと、外周面に固着されるカムフォロア１４ａと、
リング突起部１４ｄと、前方に延出する２つの直進キー
部１４ｂと、直進キー１２が円周方向で精密嵌合するリ
ング内周のガイド溝１４ｃとを有している。The straight key ring 14 includes a ring outer peripheral surface 14f, a cam follower 14a fixed to the outer peripheral surface,
It has a ring projection 14d, two rectilinear keys 14b extending forward, and a guide groove 14c on the inner periphery of the ring in which the rectilinear keys 12 are precisely fitted in the circumferential direction.
【００２１】上記カム環５を組み込むには、回転環４の
内周面４ｆに嵌入し、カムフォロア５ａを回転環４の直
進溝４ｄに係合させた状態とする。そこで、直進キーリ
ング１４のリング突部１４ｄを図示せぬカム環５の端部
に設けた切り欠きからカム環５の内周溝５ｂに回転可能
に嵌入させ、リング外周面１４ｆを回転環４の内周面４
ｆに嵌合た状態で直進キーリング１４が取り付けられ
る。その取り付け状態で直進キー１４のカムフォロア１
４ａは、カム溝４ｅに摺動自在に嵌入し、さらに、ガイ
ド溝１４ｃには直進キー１２が摺動自在に嵌入する。し
たがって、上記カム環５は、回転環４とともに回転し、
かつ、光軸Ｏ方向回転が規制される直進キーリング１４
とともに進退可能となり、回転環４の回転に伴ってカム
溝４ｅにより直進キーリング１４を介して進退駆動され
る。In order to incorporate the cam ring 5, the cam ring 5 is fitted into the inner peripheral surface 4 f of the rotary ring 4, and the cam follower 5 a is engaged with the straight groove 4 d of the rotary ring 4. Therefore, the ring projection 14d of the straight key ring 14 is rotatably fitted into the inner peripheral groove 5b of the cam ring 5 from a notch provided at the end of the cam ring 5 (not shown), and the ring outer peripheral surface 14f is Inner circumference 4
The straight key ring 14 is attached in a state fitted to f. In the attached state, the cam follower 1 of the straight key 14
4a is slidably fitted into the cam groove 4e, and the straight key 12 is slidably fitted into the guide groove 14c. Therefore, the cam ring 5 rotates together with the rotating ring 4,
And a straight key ring 14 whose rotation in the optical axis O direction is restricted.
With the rotation of the rotary ring 4, the cam ring 4 e drives the reciprocation via the straight key ring 14.
【００２２】なお、リング突起部１４ｄの外周面と回転
環５の内周溝５ｂの谷径との間、および、内周溝１４ｅ
の谷径とのカム環５の内周溝５ｂの外側の内径面（内周
面５ｇと等しい）との間には、直進キーリング１４とカ
ム環５の嵌合時の逃げとなる隙間が設けられている。Incidentally, between the outer peripheral surface of the ring projection 14d and the valley diameter of the inner peripheral groove 5b of the rotary ring 5, and the inner peripheral groove 14e.
A gap is provided between the straight diameter key ring 14 and the cam ring 5 when the straight key ring 14 is fitted to the cam ring 5. Have been.
【００２３】上記第１群枠６は、円環部材であって、後
方部外周にカムフォロア６ａが固着され、内周面６ｇに
直進ガイド溝６ｂ，６ｄが設けられ、前面部に３つの治
具挿通開口部６ｃと、上記開口部６ｃを避けた部分に３
分割されたレンズ保持内周部６ｅ，６ｆとが設けられて
いる。上記レンズ保持内周部６ｅ，６ｆには第１群レン
ズ４１であるレンズ２０，２１が径方向，光軸方向とも
に遊びのある遊合状態で挿入され、後述するレンズ組み
立て治具３０により位置決めされて接着固定される。上
記遊びの寸法は、各構成部材の部品精度を吸収するに十
分な寸法とする。The first group frame 6 is an annular member. A cam follower 6a is fixed to the outer periphery of the rear part, straight guide grooves 6b and 6d are provided on the inner peripheral surface 6g, and three jigs are provided on the front part. The insertion opening 6c and the portion avoiding the opening 6c
The divided lens holding inner peripheral portions 6e and 6f are provided. The lenses 20, 21 as the first group lens 41 are inserted into the lens holding inner peripheral portions 6e, 6f in a play state in which play is provided in both the radial direction and the optical axis direction, and are positioned by a lens assembly jig 30 described later. To be fixed. The size of the play is set to a size sufficient to absorb the component accuracy of each component.
【００２４】この第１群枠６は、その外周面６ｈがカム
環５の内周面５ｇに相対回転，進退自在に嵌入され、カ
ムフォロア６ａがカム環５のカム溝５ｄに、また、直進
ガイド溝６ｄに直進キーリング１４の直進キー部１４ｂ
がそれぞれ円周方向で精密嵌合状態で光軸Ｏ方向に摺動
自在に嵌入して組み込まれる。したがって、第１群枠６
は、カム環５の回転に伴って回転することなく光軸Ｏ方
向に進退駆動される。The first group frame 6 has its outer peripheral surface 6h fitted into the inner peripheral surface 5g of the cam ring 5 so as to be rotatable and retractable, the cam follower 6a is inserted into the cam groove 5d of the cam ring 5, and the linear guide. Straight key portion 14b of straight key ring 14 in groove 6d
Are slidably fitted in the direction of the optical axis O in a precision fitting state in the circumferential direction and are incorporated. Therefore, the first group frame 6
Is driven in the direction of the optical axis O without rotating with the rotation of the cam ring 5.
【００２５】上記第２群枠７は、円環部材であって、外
周部に光軸Ｏ方向後方に延出する３等分位置に突状の２
つの直進ガイド部７a1および１つの直進ガイド部７a2
と、左右２つの切り欠き部７ｆが設けられ、前面部に３
つの治具挿通開口部７ｃと、上記開口部７ｃを避けた部
分に３分割されたレンズ保持内周部７ｈ，７ｉ，７ｊ
（図４参照）と、上記直進ガイド部間の外周面７ｋと、
後方部分に円筒状に設けられた外周面７ｍと、その外周
面７ｍに固着されるピン７ｒが設けられている。The second group frame 7 is an annular member, and has a protruding 2 at an equally-divided position extending rearward in the optical axis O direction on the outer peripheral portion.
One straight guide portion 7a1 and one straight guide portion 7a2
And two notches 7f on the left and right sides.
Three jig insertion openings 7c, and lens holding inner peripheral portions 7h, 7i, 7j divided into three portions avoiding the openings 7c.
(See FIG. 4), an outer peripheral surface 7 k between the straight guide portions,
An outer peripheral surface 7m provided in a cylindrical shape at a rear portion and a pin 7r fixed to the outer peripheral surface 7m are provided.
【００２６】上記第２群枠７の３つの直進ガイド部７a
1，７a2のうち、上方に位置する２つのガイド部７a1の
前方端部に切り込みが入った弾性手段としての舌片部７
ｂが設けられている。その舌片部７ｂは、径方向に弾性
変形が可能であり、外周側に小突起部７ｇを有する。The three linear guide portions 7a of the second group frame 7
A tongue piece 7 as a resilient means having a notch at the front end of the two guide parts 7a1 located at the upper part of 1, 7a2.
b is provided. The tongue piece 7b is elastically deformable in the radial direction, and has a small protrusion 7g on the outer peripheral side.
【００２７】上記レンズ保持内周部７ｈ，７ｉ，７ｊに
は第２群レンズ４２であるレンズ２２，２３，２４，２
５，２６が径方向，光軸方向ともに遊びのある遊合状態
で挿入可能であり、後述するレンズ組み立て治具３０に
より位置決めされ、正しい位置に接着固定される。上記
遊びの寸法は、後述するガタ取り機構による片寄せ量、
および、各構成部材の部品精度を吸収するに十分な寸法
とする。The lenses 22, 23, 24, and 2, which are the second group lenses 42, are provided on the lens holding inner peripheral portions 7 h, 7 i, and 7 j.
5 and 26 can be inserted in a play state with play in both the radial direction and the optical axis direction, are positioned by a lens assembly jig 30 described later, and are adhesively fixed at a correct position. The size of the play is determined by the amount of misalignment by a play removing mechanism described later,
In addition, the dimensions should be sufficient to absorb the component accuracy of each component.
【００２８】この第２群枠７は、外周面７ｋが第１群枠
６の内周面６ｇに進退自在に嵌入され、直進ガイド部７
a1，７a2が第１群枠６の直進ガイド溝６ｂに摺動自在に
嵌入した状態で組み込まれる。なお、上記切り欠き７ｆ
には直進キーリング１４の直進キー部１４ｂがガタのあ
る状態で挿通した状態で組み込まれる。直進キー部１４
ｂは、第１群枠６に設けられた別の溝である直進ガイド
溝６ｄに光軸Ｏ方向に摺動可能に嵌入する。したがっ
て、第２群枠７は、第１群枠６に対して直進ガイド溝６
ｂにより回転規制された状態で進退移動可能に支持され
る。The second group frame 7 has its outer peripheral surface 7k fitted into the inner peripheral surface 6g of the first group frame 6 so as to be able to advance and retreat.
a1 and 7a2 are slidably fitted into the linear guide grooves 6b of the first group frame 6. The notch 7f
Is mounted in a state where the straight key portion 14b of the straight key ring 14 is inserted with play. Straight key part 14
“b” is slidably fitted in the direction of the optical axis O into a straight guide groove 6 d which is another groove provided in the first group frame 6. Therefore, the second group frame 7 is provided with the straight guide grooves 6 with respect to the first group frame 6.
It is supported so as to be able to move forward and backward with the rotation restricted by b.
【００２９】上記第１群枠６と第２群枠７とは、上述の
ように内周面６ｇと外周面７ｋとの嵌合により光軸Ｏ上
の位置決めがなされるが、その嵌合は、精密嵌合（隙間
が極めて少ない嵌合状態）である。しかし、わずかな嵌
合ガタは避けられない。その嵌合ガタをなくすために上
記直進ガイド部７a1の舌片部７ｂの弾性変形による付勢
力を利用して第１群枠６に対して第２群枠７を下方のＳ
方向（図５参照）に片寄せして上記の嵌合ガタを取り除
くガタ取り機構が採用されている。このガタ取り機構の
詳細については、図５を参照して後で説明する。The first group frame 6 and the second group frame 7 are positioned on the optical axis O by fitting the inner peripheral surface 6g and the outer peripheral surface 7k as described above. , Precision fitting (fitting state where the gap is extremely small). However, slight backlash is inevitable. In order to eliminate the play, the second group frame 7 is moved downward with respect to the first group frame 6 by utilizing the urging force of the tongue piece 7b of the linear guide section 7a1 by elastic deformation.
A play removing mechanism is employed in which the fitting play is removed by offsetting in the direction (see FIG. 5). The details of the play removing mechanism will be described later with reference to FIG.
【００３０】上記第２群ガイド枠９は、円環部材であっ
て、外周部に光軸Ｏ方向に沿って直進ガイド溝９ｃと、
直進キー部１４ｂ、直進キー１２がそれぞれガタ状態で
挿通する切り欠き部９ｆおよび挿通穴９ｅと、中央部に
貫通する開口部９ｇと、後方外周に沿って外周溝９ａ
と、上記外周溝上に突起挿通用切り欠き部９ｂとが設け
られている。The second group guide frame 9 is an annular member, and has a linear guide groove 9c on the outer periphery along the optical axis O direction.
The notch 9f and the insertion hole 9e through which the rectilinear key portion 14b and the rectilinear key 12 are inserted in a loose state, an opening 9g penetrating the center, and an outer peripheral groove 9a along the rear outer periphery.
And a projection insertion notch 9b on the outer peripheral groove.
【００３１】この第２群ガイド枠９は、第２群枠７に対
して上記直進ガイド部内周７ｎに嵌合して取り付けられ
る。その取り付け状態では、直進ガイド溝９ｃに第２群
枠７の直進ガイド部７a1と７a2を嵌入させて光軸Ｏ回り
が規制され、進退移動可能となる。The second group guide frame 9 is fitted to and attached to the second group frame 7 on the inner periphery 7n of the straight guide portion. In the mounted state, the rectilinear guide portions 7a1 and 7a2 of the second group frame 7 are fitted into the rectilinear guide grooves 9c, whereby the rotation around the optical axis O is regulated, and the rectilinear movement is possible.
【００３２】上記第２群ガイド枠連結環（以下、Ｇ枠連
結環と記載）１０は、リング状部材であって、外周１０
ｆに固着される３つ（複数）のカムフォロア１０ａと、
内周１０ｅ上に突起１０ｂ、直進キー１２がガタ状態で
挿通する切り欠き１０ｃ、直進キー部１４ｂが円周方向
に精密嵌合状態で挿通する直進ガイド溝１０ｄとが設け
られている。The second group guide frame connecting ring (hereinafter, referred to as a G frame connecting ring) 10 is a ring-shaped member and has an outer periphery 10.
f) three (plural) cam followers 10a fixed to f.
On the inner periphery 10e, there are provided a projection 10b, a notch 10c through which the rectilinear key 12 is inserted in a loose state, and a rectilinear guide groove 10d through which the rectilinear key portion 14b is inserted in a circumferentially precise state.
【００３３】このＧ枠連結環１０は、その外周１０ｆを
カム環５の内周５ｇに嵌入させ、カムフォロア１０ａを
カム溝５ｅに摺動自在に嵌入させて取り付けられる。こ
のとき、直進ガイド溝１０ｄに直進キー部１４ｂが挿通
する。The G frame connecting ring 10 is mounted by fitting its outer periphery 10f to the inner periphery 5g of the cam ring 5 and slidably fitting the cam follower 10a to the cam groove 5e. At this time, the straight key portion 14b is inserted into the straight guide groove 10d.
【００３４】さらに、上記Ｇ枠連結環１０は、上記第２
群ガイド枠９の外周溝９ａに突起１０ｂを切り欠き９ｂ
を介して嵌入させて第２群ガイド枠９と連結され光軸Ｏ
方向に一体化される。そして、上記第２群ガイド枠９に
は第２群枠７がその直進ガイド部７a1，７a2を直進ガイ
ド溝９ｃに嵌入させた状態で嵌合する。Further, the G frame connecting ring 10 is
Cut out projection 10b in outer circumferential groove 9a of group guide frame 9
And connected to the second group guide frame 9 via the optical axis O.
Direction. Then, the second group frame 7 is fitted to the second group guide frame 9 in a state where the straight guide portions 7a1 and 7a2 are fitted in the straight guide grooves 9c.
【００３５】但し、上記Ｇ枠連結環１０と第２群ガイド
枠９との組み立て順は、鏡枠構造によっては先に上記連
結環１０を上記第２群ガイド枠９に取り付け、その後、
カム環５に装着することも可能である。However, the assembling order of the G frame connecting ring 10 and the second group guide frame 9 may be such that the connecting ring 10 is first attached to the second group guide frame 9 depending on the mirror frame structure, and thereafter,
It can be mounted on the cam ring 5.
【００３６】上記の組み付け状態では直進キー１２がガ
タのある状態で挿通穴９ｅと切り欠き１０ｃを挿通し、
直進キー部１４ｂがＧ枠連結環１０の直進ガイド溝１０
ｄに精密嵌合状態で挿通し、切り欠き９ｆをガタのある
状態で挿通している。したがって、Ｇ枠連結環１０は直
進キー部１４ｂにより、第２群ガイド枠９は、第２群枠
７の直進ガイド部７ａとその内周７ｎを介して第２群枠
７に摺動自在に保持されており、第２群ガイド枠９とＧ
枠連結環１０は、一体の状態でカム環５の回転に伴って
カムフォロア１０ａを介して回転することなく光軸Ｏ方
向に進退駆動される。In the above assembled state, the rectilinear key 12 is inserted through the insertion hole 9e and the notch 10c with the backlash.
The rectilinear key portion 14b is connected to the rectilinear guide groove 10 of the G frame connecting ring 10.
d is inserted in a precision fitting state, and the notch 9f is inserted with a play. Accordingly, the G frame connecting ring 10 is slidably moved by the straight key portion 14b, and the second group guide frame 9 is slidable on the second group frame 7 via the straight guide portion 7a of the second group frame 7 and the inner periphery 7n thereof. And the second group guide frame 9 and G
The frame connecting ring 10 is driven in the optical axis O direction without rotating via the cam follower 10a with the rotation of the cam ring 5 in an integrated state.
【００３７】なお、上記第２群ガイド枠９と上記第２群
枠７との間には、図示しないフォーカシング駆動機構が
配設されており、そのフォーカシング駆動機構により第
２群枠７を第２群ガイド枠９に対して相対的に光軸Ｏ方
向に進退駆動し、フォーカシングが実行される。A focusing drive mechanism (not shown) is provided between the second group guide frame 9 and the second group frame 7, and the second group frame 7 is moved to the second group by the focusing drive mechanism. Focusing is performed by moving forward and backward relative to the group guide frame 9 in the optical axis O direction.
【００３８】上述したように上記Ｇ枠連結環１０と上記
第２群ガイド枠９とは、外周溝９ａにて連結されるが、
その連結嵌合状態において、図７の拡大断面図に示すよ
うに光軸Ｏ方向に関しては、上記外周溝９ａと突起１０
ｂが精密嵌合して連結される。光軸Ｏ方向と直交する径
方向に関しては、Ｇ枠連結環１０の外周１０ｆがカム環
５の内周５ｇに精密嵌合し、一方、第２群ガイド枠９
は、その直進ガイド溝９ｃの底部が第２群枠７の内周７
ｎに精密嵌合して保持されている。つまり、Ｇ枠連結環
１０の光軸Ｏ中心と第２群ガイド枠９の光軸Ｏ中心と
は、光学的な意味での精密さでいえば、種々の部品誤差
によってずれている。As described above, the G frame connecting ring 10 and the second group guide frame 9 are connected by the outer peripheral groove 9a.
In the connected and fitted state, as shown in the enlarged sectional view of FIG.
b is precisely fitted and connected. In the radial direction orthogonal to the optical axis O direction, the outer circumference 10f of the G frame connection ring 10 is precisely fitted to the inner circumference 5g of the cam ring 5, while the second group guide frame 9
The bottom of the straight guide groove 9c is the inner periphery 7 of the second group frame 7.
n and are held in a precise fit. That is, the center of the optical axis O of the G frame connecting ring 10 and the center of the optical axis O of the second group guide frame 9 are shifted due to various component errors in terms of optical precision.
【００３９】したがって、径方向に関してＧ枠連結環１
０と第２群ガイド枠９の連結嵌合部間で径方向の相対移
動手段となる逃げ部を設ける必要がある。すなわち、Ｇ
枠連結環１０を第２群ガイド枠９に対して進退方向と直
交する方向に浮動状態で支持する必要がある。Therefore, in the radial direction, the G frame connecting ring 1
It is necessary to provide a relief portion serving as a radial relative moving means between the connection fitting portion of the second group guide frame 9 and the connection fitting portion of the second group guide frame 9. That is, G
It is necessary to support the frame connecting ring 10 in a floating state with respect to the second group guide frame 9 in a direction orthogonal to the advance / retreat direction.
【００４０】そのために、図７の拡大断面図に示すよう
に第２群ガイド枠９の外周９ｄとＧ枠連結環１０の内周
１０ｅの間に若干の隙間（相対移動手段）を設け、同様
に第２群ガイド枠９の外周溝９ａの底面と上記連結環１
０の突起１０ｂの先端１０baの間に若干の隙間（相対移
動手段）を設け、上記連結環１０の径方向の詰まりを防
止すると同時にこの詰まりから生じる部品変形によるレ
ンズ光軸Ｏのずれ発生を防止している。For this purpose, a slight gap (relative moving means) is provided between the outer periphery 9d of the second group guide frame 9 and the inner periphery 10e of the G frame connecting ring 10 as shown in the enlarged sectional view of FIG. The bottom surface of the outer peripheral groove 9a of the second group guide frame 9 and the connecting ring 1
A slight gap (relative moving means) is provided between the distal ends 10ba of the protrusions 10b to prevent the connecting ring 10 from being clogged in the radial direction and at the same time, preventing the lens optical axis O from being displaced due to the deformation of components caused by the clogging. are doing.
【００４１】上記第３群枠８は、円環部材であって、後
方外周に沿って外周溝８ａと、突起挿通用切り欠き８ｂ
と、上述するレンズ組み立て治具３０が挿通される３つ
の治具挿通開口部８ｃと、上記開口部８ｃを避けた部分
に３分割されたレンズ保持内周部８ｇ，８ｈ，８ｉ（図
４参照）と、上記第２群枠７の外周部７ｍに精密嵌合す
る内周部８ｄと、上記内周部８ｄ上の上方部に径方向に
弾性変形可能な２つの弾性手段としての舌片部８ｅと、
第２群枠７に対して回転防止のため、内周部８ｄに設け
られ、上記ピン７ｒと係合摺動する直進溝８ｊとが設け
られている。The third group frame 8 is an annular member, and has an outer peripheral groove 8a and a projection insertion notch 8b along the rear outer periphery.
In addition, three jig insertion openings 8c through which the above-described lens assembly jig 30 is inserted, and lens holding inner peripheral portions 8g, 8h, and 8i divided into three portions avoiding the openings 8c (see FIG. 4). ), An inner peripheral portion 8d precisely fitted to the outer peripheral portion 7m of the second group frame 7, and a tongue piece portion as two elastic means capable of being elastically deformed in the radial direction on an upper portion on the inner peripheral portion 8d. 8e,
In order to prevent rotation of the second group frame 7, a linear groove 8j is provided on the inner peripheral portion 8d so as to engage and slide with the pin 7r.
【００４２】上記第３群枠８のレンズ保持内周部８ｇ，
８ｈ，８ｉには第３群レンズ４３であるレンズ２７，２
８，２９が径方向，光軸方向ともに遊びのある遊合状態
で挿入され、後述するレンズ組み立て治具３０により位
置決めされて接着固定される。上記遊びの寸法は、各構
成部材の部品精度を吸収するに十分な寸法とする。The lens holding inner peripheral portion 8g of the third group frame 8,
8h and 8i include lenses 27 and 2 that are the third group lens 43.
8 and 29 are inserted in a play state with play in both the radial direction and the optical axis direction, and are positioned and bonded and fixed by a lens assembly jig 30 described later. The size of the play is set to a size sufficient to absorb the component accuracy of each component.
【００４３】上記第３群枠連結環（以下、Ｌ枠連結環と
記載）１１は、第３群枠８に対する相対移動枠部材（浮
動枠部材）であるリング状の部材であって、外周１１ｆ
に固着される３つ（複数）のカムフォロア１１ａと、内
周１１ｅ上に突起１１ｂ、直進キー部１４ｂが円周方向
において精密嵌合状態で挿通する直進ガイド穴１１ｃ
と、直進キー１２がガタ状態で挿通する切り欠き１１ｄ
とが設けられている。The third group frame connecting ring (hereinafter referred to as L frame connecting ring) 11 is a ring-shaped member that is a moving frame member (floating frame member) relative to the third group frame 8, and has an outer periphery 11f.
(A plurality of) cam followers 11a fixed to the inner periphery 11e, a projection 11b on the inner periphery 11e, and a rectilinear guide hole 11c through which the rectilinear key portion 14b is inserted in a precise fitting state in the circumferential direction.
And a notch 11d through which the straight key 12 is inserted in a loose state.
Are provided.
【００４４】上記Ｌ枠連結環１１は、その外周１１ｆを
カム環５の内周５ｇに嵌入させ、カムフォロア１１ａを
カム溝５ｆに摺動自在に嵌入させてカム環５に取り付け
る。このとき、直進ガイド穴１１ｃに直進キー部１４ｂ
が挿通する。The L frame connecting ring 11 is attached to the cam ring 5 by fitting its outer periphery 11f into the inner periphery 5g of the cam ring 5 and slidably fitting the cam follower 11a into the cam groove 5f. At this time, the straight key portion 14b is inserted into the straight guide hole 11c.
Is inserted.
【００４５】さらに、上記Ｌ枠連結環１１の突起１１ｂ
を第３群枠８の外周溝８ａに設けられた切り欠き８ｂに
挿通させて嵌入し、上記連結環１１を第３群枠８に連結
する。さらに、上記第３群枠８は、その内周部８ｄを第
２群枠７の外周部７ｍに嵌合させて組み付けられる。Further, the protrusion 11b of the L-frame connecting ring 11 is provided.
Through the notch 8b provided in the outer peripheral groove 8a of the third group frame 8 and fitted therein, and the connecting ring 11 is connected to the third group frame 8. Further, the third group frame 8 is assembled by fitting its inner peripheral portion 8d to the outer peripheral portion 7m of the second group frame 7.
【００４６】但し、上記Ｌ枠連結環１１と第３群枠８の
組み立て順は、鏡枠構造によっては先に上記連結環１１
を第３枠８に装着した後でカム環５に挿入することも可
能である。However, the order of assembling the L frame connecting ring 11 and the third group frame 8 may be different depending on the lens frame structure.
Can be inserted into the cam ring 5 after being mounted on the third frame 8.
【００４７】上記組み付け状態ではＬ枠連結環１１は、
直進キー部１４ｂにより回転が規制され、また、第３群
枠８は、直進溝８ｊとピン７ｒとの係合により回転が規
制され、第２群枠７に対して光軸Ｏ方向にのみ摺動自在
に保持される。そして、第３群保持枠８とＬ枠連結環１
１は、一体の状態でカム環５の回転に伴ってカムフォロ
ア１１ａを介して光軸Ｏ方向に進退駆動される。In the above assembled state, the L frame connecting ring 11 is
The rotation of the third group frame 8 is restricted by the engagement between the rectilinear groove 8j and the pin 7r, and the rotation of the third group frame 8 is slid only in the optical axis O direction with respect to the second group frame 7. It is held movably. Then, the third group holding frame 8 and the L frame connecting ring 1
1 is driven in the optical axis O direction via the cam follower 11a with the rotation of the cam ring 5 in an integrated state.
【００４８】上記Ｌ枠連結環１１と上記第３群枠８と
は、上述したように外周溝８ａにて連結されるが、その
連結嵌合状態において、図８の拡大断面図にも示すよう
に光軸Ｏ方向に関しては、上記外周溝８ａと突起１１ｂ
が精密嵌合して連結される。また、光軸Ｏ方向と直交す
る径方向に関しては、上記連結環１１の外周１１ｆがカ
ム環５の内周５ｇに精密嵌合し、一方、第３群枠８の内
周８ｄが第２群枠７の外周面７ｍに精密嵌合して保持さ
れている。つまり、Ｌ枠連結環１１の光軸Ｏ中心と第３
群枠８の光軸Ｏ中心とは、光学的な意味での精密さでい
えば、種々の部品誤差によってずれている。The L frame connecting ring 11 and the third group frame 8 are connected by the outer peripheral groove 8a as described above. In the connected and fitted state, as shown in the enlarged sectional view of FIG. In the optical axis O direction, the outer peripheral groove 8a and the protrusion 11b
Are precisely fitted and connected. In the radial direction orthogonal to the optical axis O direction, the outer circumference 11f of the connection ring 11 is precisely fitted to the inner circumference 5g of the cam ring 5, while the inner circumference 8d of the third group frame 8 is in the second group. It is precisely fitted and held on the outer peripheral surface 7m of the frame 7. That is, the center of the optical axis O of the L-frame connecting ring 11 and the third
The optical axis O of the group frame 8 is shifted from the center of the optical axis O by various component errors in terms of precision in an optical sense.
【００４９】したがって、径方向に関してＬ枠連結環１
１と第３群枠８の連結嵌合部間で径方向の相対移動手段
として逃げ部を設ける必要がある。すなわち、Ｌ枠連結
環１１を第３群枠８に対して進退方向と直交する方向に
浮動状態で支持する必要がある。そのために、図８の拡
大断面図に示すように第３群枠８の外周８ｇとＬ枠連結
環１１の内周１１ｅの間に若干の隙間（相対移動手段）
を設け、また、第３群枠８の外周溝８ａのうち、Ｌ枠連
結環１１の突起１１ｂが嵌入する部分の周溝部分（相対
移動手段）は、底部のない溝として上記突起１１ｂの先
端を貫通させ、径方向の詰まりを防止すると同時にこの
詰まりから生じる部品変形によるレンズ光軸Ｏのずれ発
生を防止している。Therefore, in the radial direction, the L frame connecting ring 1
It is necessary to provide a relief portion as a relative moving means in the radial direction between the connection fitting portions of the first and third group frames 8. That is, it is necessary to support the L frame connecting ring 11 in a floating state with respect to the third group frame 8 in a direction orthogonal to the advance / retreat direction. Therefore, as shown in the enlarged cross-sectional view of FIG. 8, a slight gap (relative moving means) between the outer circumference 8g of the third group frame 8 and the inner circumference 11e of the L frame connecting ring 11
In the outer peripheral groove 8a of the third group frame 8, the peripheral groove portion (relative moving means) of the portion into which the projection 11b of the L frame connecting ring 11 is fitted is formed as a groove without a bottom, and the tip of the projection 11b is formed as a groove without a bottom. To prevent clogging in the radial direction, and at the same time, to prevent displacement of the lens optical axis O due to deformation of components caused by this clogging.
【００５０】また、上記第３群枠８と第２群枠７とは、
内周面８ｄと外周面７ｍとの嵌合により光軸Ｏと直交す
る方向の位置決めがなされるが、その嵌合は、精密嵌合
（隙間が極めて少ない嵌合状態）であるがわずかな嵌合
ガタは避けられない。その嵌合ガタをなくすために、第
２群枠７と第１群枠６の場合と同様なガタ取り機構を採
用している。但し、上記第３群枠８と第２群枠７とのガ
タ取り機構においては、後述する舌片部８ｅが第２群枠
７の外周面７ｍに当接するような構造とし、舌片部の付
勢状態が異なる。The third group frame 8 and the second group frame 7 are
Although the positioning in the direction orthogonal to the optical axis O is performed by fitting the inner peripheral surface 8d and the outer peripheral surface 7m, the fitting is precise fitting (fitting state with a very small gap), but slight fitting. Joint play is inevitable. In order to eliminate the play, a play removing mechanism similar to that of the second group frame 7 and the first group frame 6 is employed. However, the play mechanism between the third group frame 8 and the second group frame 7 has a structure in which a tongue piece 8e described later comes into contact with the outer peripheral surface 7m of the second group frame 7, and The energized state is different.
【００５１】すなわち、上記内周面８ｄを形成する筒部
に舌片部８ｅを配設し、その舌片部８ｅを第２群枠７の
外周面７ｍに当接させる。上記舌片部８ｅの弾性変形に
よる付勢力により第２群枠７に対して第３群枠８を相対
的に上方に片寄せして嵌合ガタを取り除いている。な
お、上記ガタ取り機構によりガタ取りを行った場合、枠
に装着されるレンズの芯ずれが生じる可能性があるが、
そのずれは、枠に装着されるレンズの外径とレンズ保持
内周部８ｇ，８ｈ，８ｉの隙間を所定量に取り、後述す
るレンズ組み立て治具を用いて位置決めし、固着するこ
とでレンズ芯ずれが補正される。That is, the tongue piece 8e is disposed on the cylindrical portion forming the inner peripheral surface 8d, and the tongue piece 8e is brought into contact with the outer peripheral surface 7m of the second group frame 7. The third group frame 8 is biased relatively upward with respect to the second group frame 7 by the biasing force due to the elastic deformation of the tongue piece 8e to remove the fitting play. In addition, when the play is performed by the play removal mechanism, there is a possibility that the center of the lens mounted on the frame may be misaligned.
The displacement is determined by taking a predetermined amount of clearance between the outer diameter of the lens mounted on the frame and the inner peripheral portions 8g, 8h, 8i of the lens, positioning the lens using a lens assembly jig described later, and fixing the lens core. The displacement is corrected.
【００５２】ここで、前述した第１群枠６と第２群枠７
の嵌合部のガタ取り機構の詳細について図５の断面図を
用いて説明する。図５の断面図に示すように第１群枠６
と第２群枠７の嵌合部において、上記第２群枠７の直進
ガイド部７a1が第１群枠６の直進ガイド溝６ｂに嵌入す
ると、舌片部７ｂの小突起７ｇが直進ガイド溝６ｂの底
面に当接するのでその付勢力により第２群枠７が第１群
枠６に対してＳ方向に片寄せされ、嵌合ガタのない状態
が得られる。Here, the first group frame 6 and the second group frame 7 described above are used.
The details of the backlash removing mechanism of the fitting portion will be described with reference to the cross-sectional view of FIG. As shown in the sectional view of FIG.
When the rectilinear guide portion 7a1 of the second group frame 7 fits into the rectilinear guide groove 6b of the first group frame 6 in the fitting portion of the second group frame 7 and the small protrusion 7g of the tongue piece 7b, the linear guide groove is formed. Since the second group frame 7 is in contact with the bottom surface of the first group frame 6 in the S direction due to the urging force of the second group frame 6b, a state in which there is no fitting play is obtained.
【００５３】但し、第１群枠６の直進ガイド溝６ｂと第
２枠７の下方位置の直進ガイド部７a2との回転方向（円
周方向）の隙間はほとんどない精密嵌合状態とする。他
の直進ガイド溝６ｂと第２枠７の上方両側の直進ガイド
部７a1とは、わずかな嵌合隙間のある状態とする。However, there is almost no clearance in the rotational direction (circumferential direction) between the linear guide groove 6b of the first group frame 6 and the linear guide portion 7a2 located below the second frame 7, so as to be in a precision fitting state. The other rectilinear guide groove 6b and the rectilinear guide portions 7a1 on both upper sides of the second frame 7 are in a state where there is a slight fitting gap.
【００５４】上記ガタ取り機構によりガタ取りを行った
場合、保持枠部材に装着されるレンズの芯ずれが生じる
可能性がある。しかし、そのずれは、保持枠部材に装着
されるレンズの外径とレンズ保持内周部７ｈ，７ｉ，７
ｊとに必要なギャップを取っておき、レンズ組み立て治
具３０（後述）を用いて正しい位置にレンズを保持した
状態で接着固定することでレンズ芯ずれは補正される。When the play is performed by the play removing mechanism, there is a possibility that the center of the lens mounted on the holding frame member is misaligned. However, the deviation is caused by the outer diameter of the lens mounted on the holding frame member and the inner circumferential portions 7h, 7i, 7 of the lens holding.
A gap required for j is set aside, and the lens center misalignment is corrected by bonding and fixing the lens at a correct position using a lens assembly jig 30 (described later).
【００５５】上記レンズの外径とレンズ保持内周部のガ
タ取りにより必要となるギャップｇについて説明する
と、図５に示すように上記第１群枠６と第２群枠７との
枠間のギャップＧは、それぞれの枠の内周面６ｇの直径
をＤ1 と、外周面７ｋの直径をＤ2 とすると、 Ｇ＝Ｄ1 −Ｄ2 ……（１） である。A description will be given of the outer diameter of the lens and the gap g required for the play of the lens holding inner peripheral portion. As shown in FIG. 5, the gap between the first group frame 6 and the second group frame 7, as shown in FIG. Assuming that the diameter of the inner peripheral surface 6g of each frame is D1 and the diameter of the outer peripheral surface 7k is D2, the gap G is as follows: G = D1-D2 (1)
【００５６】一方、第２群枠７のレンズ保持内周部７
ｈ，７ｉ，７ｊのいずれか、例えば、７ｈの直径をＤ4
とし、それに対応して装着される第２群レンズ４２のう
ちのレンズ２２の直径をＤ3 とすると、その間のギャッ
プｇは、 ｇ＝Ｄ4 −Ｄ3 ……（２） である。On the other hand, the lens holding inner peripheral portion 7 of the second group frame 7
h, 7i, 7j, for example, the diameter of 7h is D4
Assuming that the diameter of the lens 22 of the second group lens 42 mounted corresponding thereto is D3, the gap g therebetween is g = D4 -D3 (2).
【００５７】いま、第１群枠６の中心を一致させるべき
光軸Ｏ1 （前述の光軸Ｏと等しい）とすると、その基準
となる光軸Ｏ1 からレンズ２２の光軸Ｏ2 が最大に偏心
する量Ｅは、上記ギャップにより Ｅ＝Ｇ／２＋ｇ／２……（３） となる。上記最大に偏心した位置から上記基準となる光
軸Ｏ1 までレンズを移動して戻すためのギャップｇは、
上記偏心する量Ｅに相当するので、（３）式より、ｇ＝
Ｇ／２＋ｇ／２となり、したがって、ｇ＝Ｇとなる。Now, assuming that the center of the first group frame 6 is the optical axis O1 (equal to the above-mentioned optical axis O), the optical axis O2 of the lens 22 is maximally decentered from the optical axis O1 as the reference. The amount E becomes E = G / 2 + g / 2 (3) due to the gap. The gap g for moving the lens back from the maximum eccentric position to the reference optical axis O1 is:
Since it corresponds to the amount of eccentricity E, g =
G / 2 + g / 2, and therefore g = G.
【００５８】上述したようにギャップｇは、ギャップＧ
と等しく、第２群レンズと第２群枠７のレンズ保持内周
部と隙間としては、少なくとも上記（１）式のギャップ
Ｇ以上を確保する必要がある。As described above, the gap g is equal to the gap G
As the gap, it is necessary to secure at least the gap G of the above-mentioned formula (1) as the gap between the second group lens and the lens holding inner peripheral portion of the second group frame 7.
【００５９】なお、上記第２群枠７の片寄せによりレン
ズの芯精度を確実に維持するには、例えば、舌片部７ｂ
の小突起７ｇの光軸Ｏ方向の位置をレンズ群の位置に合
致させるとよい。さらに、上記小突起７ｇの位置を内周
面６ｇと外周面７ｋとの嵌合長の中央位置の近傍に位置
させるとその効果が向上する。In order to reliably maintain the core accuracy of the lens by shifting the second group frame 7, for example, the tongue piece 7b
The position of the small projection 7g in the optical axis O direction may be matched with the position of the lens group. Further, when the position of the small projection 7g is located near the center of the fitting length between the inner peripheral surface 6g and the outer peripheral surface 7k, the effect is improved.
【００６０】また、上記第２群枠７の舌片部７ｂは、レ
ンズ鏡筒１が繰り出し状態にて第１群枠６の直進ガイド
溝６ｂに常時当接し、弾性変形しているので、そのため
のへたり（永久変形）が生じる可能性がある。それを防
止するために図６に示すようにレンズ鏡筒収納状態にお
いては、第２群枠７の舌片部７ｂの小突起７ｇを、直進
ガイド溝６ｂの底部がさらに深くなった凹部６ｈ内に位
置させて、舌片部７ｂの変形状態を解放させる。The tongue piece 7b of the second group frame 7 is always in contact with the straight guide groove 6b of the first group frame 6 when the lens barrel 1 is extended, and is elastically deformed. Settling (permanent deformation) may occur. In order to prevent this, as shown in FIG. 6, when the lens barrel is housed, the small projection 7g of the tongue piece 7b of the second group frame 7 is inserted into the recess 6h in which the bottom of the rectilinear guide groove 6b is further deepened. To release the deformed state of the tongue piece 7b.
【００６１】次に、レンズ組み立て治具３０を用いて第
１群枠６，第２群枠７，第３群枠８にそれぞれ第１群レ
ンズ４１，第２群レンズ４２，第３群レンズ４３を位置
決めして接着固定する方法について、図９〜１１を用い
て説明する。なお、図９，１０は、レンズ組み立て治具
と各レンズ保持枠と各レンズ群の分解斜視図である。図
１１は、上記レンズ組み立て治具により各レンズ群と各
保持枠部材を保持した状態での縦断面図である。Next, the first lens group 41, the second lens group 42, and the third lens group 43 are respectively attached to the first group frame 6, the second group frame 7, and the third group frame 8 using the lens assembly jig 30. The method of positioning and bonding and fixing will be described with reference to FIGS. 9 and 10 are exploded perspective views of a lens assembly jig, each lens holding frame, and each lens group. FIG. 11 is a longitudinal sectional view showing a state where each lens group and each holding frame member are held by the lens assembly jig.
【００６２】上記レンズ組み立て治具（以下、治具と記
載する）３０には、第１群枠６の内周６ｇにガタなく嵌
合可能な外周３０ｄと、前方側端面３０ｍと、後方側端
面３０ｎと、前方側に突出し、第１群レンズ４１を保持
可能な３本の脚部３０ａと、後方側に突出し、第２群レ
ンズ４２を保持可能な３本の脚部３０ｂと、上記脚部３
０ｂの外方で同様に後方側に突出し、第３群レンズ４３
を保持可能な３本の脚部３０ｃとが設けられている。The lens assembly jig (hereinafter referred to as jig) 30 has an outer periphery 30d that can be fitted to the inner periphery 6g of the first group frame 6 without play, a front end surface 30m, and a rear end surface. 30n, three legs 30a projecting forward and holding the first group lens 41, three legs 30b projecting rearward and holding the second group lens 42, and the legs 3
0b, and similarly protrudes rearward, and the third group lens 43
And three legs 30c capable of holding the same.
【００６３】上記脚部３０ａにはその突出内周部にレン
ズ２０と２１とを保持可能な段状のレンズ保持面３０
ｅ，３０ｆが設けられている。また、上記脚部３０ｂに
はその突出内周部にレンズ２２，２３と、２４と、２
５，２６とを保持可能な段状のレンズ保持面３０ｇ，３
０ｈ，３０ｉが設けられている。さらに、上記脚部３０
ｃにはその突出内周部にレンズ２７と、２８と、２９と
を保持可能な段状のレンズ保持面３０ｊ，３０ｋ，３０
ｌが設けられている。The stepped lens holding surface 30 capable of holding the lenses 20 and 21 on the protruding inner peripheral portion of the leg 30a.
e, 30f are provided. The legs 30b have lenses 22, 23, 24, 2
Lens holding surfaces 30g, 3 capable of holding the lens surfaces 5 and 26
0h and 30i are provided. Further, the leg 30
c has a stepped lens holding surface 30j, 30k, 30 capable of holding the lenses 27, 28, and 29 on its protruding inner peripheral portion.
1 is provided.
【００６４】上記各レンズ群を保持枠部材に固着するに
際して、治具３０に各保持枠部材である第１群枠６，第
２群枠７，第３群枠８を取り付けるが、まず、治具３０
の前方側から外周３０ｄに第１群枠６の内周６ｇを精密
嵌合させ、治具３０の前方端面３０ｍを第１群枠６の底
面６ｉに当接させて光軸Ｏ方向の位置決めをする。その
とき、上記脚部３０ａは、第１群枠６の開口部６ｃを挿
通させて取り付ける。When each of the lens groups is fixed to the holding frame member, the first group frame 6, the second group frame 7, and the third group frame 8, which are the holding frame members, are attached to the jig 30. Utensil 30
The inner circumference 6g of the first group frame 6 is precisely fitted to the outer circumference 30d from the front side of the first group frame, and the front end surface 30m of the jig 30 is brought into contact with the bottom surface 6i of the first group frame 6 to position the optical axis O. I do. At this time, the leg 30a is attached by inserting the opening 6c of the first group frame 6 therethrough.
【００６５】また、治具３０の後方側から第２群枠７を
第１群枠６の内周６ｇに嵌入し、治具３０の後方端面３
０ｎに前端面７ｐを当接させて光軸Ｏ方向の位置決めを
する。そのとき、上記脚部３０ｂと脚部３０ｃは、第２
群枠７の開口部７ｃを挿通させて取り付ける。また、上
記嵌入状態では前述したように第２群枠７は、第１群枠
６に対して下方に嵌合ガタ分の片寄せがなされた状態に
保持される。Further, the second group frame 7 is fitted into the inner periphery 6 g of the first group frame 6 from the rear side of the jig 30, and the rear end face 3 of the jig 30 is inserted.
The front end surface 7p is brought into contact with 0n to perform positioning in the optical axis O direction. At this time, the leg 30b and the leg 30c
The opening 7c of the group frame 7 is inserted and attached. In the fitted state, as described above, the second group frame 7 is held in a state where the first group frame 6 is shifted downward by the amount of the loose fit.
【００６６】さらに、治具３０の後方側から第３群枠８
を第２群枠７の外周面７ｍに嵌入し、第２群枠７の光軸
Ｏ方向にリング状に窪んだ面７ｑに第３群枠端面８ｋを
当接させて光軸Ｏ方向の位置決めをする。そのとき、上
記脚部３０ｃは、第３群枠８の開口部８ｃを挿通させて
取り付ける。また、上記嵌入状態では前述したように第
３群枠８は、第２群枠７に対して上方に嵌合ガタ分の片
寄せがなされた状態に保持される。Further, from the rear side of the jig 30, the third group frame 8
Is fitted into the outer peripheral surface 7m of the second group frame 7, and the third group frame end surface 8k is brought into contact with the ring-shaped concave surface 7q in the optical axis O direction of the second group frame 7 to position in the optical axis O direction. do. At this time, the leg 30c is attached by inserting the opening 8c of the third group frame 8 therethrough. Further, in the fitted state, as described above, the third group frame 8 is held in a state in which the third group frame 8 is shifted upward with respect to the fitting play with respect to the second group frame 7.
【００６７】上述したように治具３０に上記各保持枠部
材を装着した状態で第１，２，３群レンズ４１，４２，
４３の各レンズの外周部を上述した各脚部の各レンズ保
持部で保持させて周方向位置決めを、さらに、各レンズ
の光軸Ｏ方向端面を対応するレンズ保持部の光軸Ｏ方向
段部、例えば、レンズ保持部３０ｅの段部３０e0やレン
ズ保持部３０ｉの段部３０i0に当接させて光軸方向の位
置決めをする。そのレンズ位置決め状態では、レンズ外
周と保持枠部材のレンズ保持内周部、例えば、レンズ２
０の外周と第１群枠６のレンズ保持内周部６ｅやレンズ
２２の外周と第２群枠７のレンズ保持内周部７ｈ等には
少なくとも部品寸法のばらつき、あるいは、枠部材の片
寄せを吸収するだけの隙間があり、レンズと保持枠部材
のレンズ保持部とは直接当接しない。As described above, with the holding frame members mounted on the jig 30, the first, second, and third lens units 41, 42,
43, the outer peripheral portion of each lens is held by each lens holding portion of each leg described above to position the lens in the circumferential direction. For example, the positioning in the optical axis direction is performed by contacting the step 30e0 of the lens holder 30e or the step 30i0 of the lens holder 30i. In the lens positioning state, the lens outer circumference and the lens holding inner circumference of the holding frame member, for example, the lens 2
The outer periphery of the lens group 0 and the lens holding inner peripheral portion 6e of the first group frame 6 and the outer periphery of the lens 22 and the lens holding inner peripheral portion 7h of the second group frame 7 have at least a variation in component dimensions or an offset of the frame member. There is a gap enough to absorb the light, and the lens does not directly contact the lens holding portion of the holding frame member.
【００６８】さらに、各レンズのすべては、光軸Ｏ方向
において各保持枠部材と隙間のある状態、すなわち、浮
いた状態で治具３０に保持される。例えば、レンズ２０
に一面（図１１のレンズ２０の右面）は、光軸Ｏ方向に
おけるレンズ保持部の段部６ｊと浮いた状態である。も
ちろん、この隙間は、上述したようにレンズ外周隙間寸
法を設けるのと同様に部品寸法のばらつき等を考慮して
設ければよい。Further, all of the lenses are held by the jig 30 in a state where there is a gap with each holding frame member in the direction of the optical axis O, that is, in a floating state. For example, the lens 20
One surface (the right surface of the lens 20 in FIG. 11) is in a state of floating with the step 6j of the lens holding unit in the optical axis O direction. Needless to say, this gap may be provided in consideration of variations in component dimensions and the like as in the case of providing the lens outer peripheral gap dimension as described above.
【００６９】上記レンズ支持状態にて各レンズとそれに
対応する各保持枠部材のレンズ保持内周部、および／ま
たは、光軸Ｏ方向におけるレンズ受け面段部の上記隙間
に接着剤を注入して接着する。接着固定後、各保持枠部
材を治具３０から取り出す。In the above-described lens supporting state, an adhesive is injected into the lens holding inner peripheral portion of each lens and the corresponding holding frame member and / or the gap of the step portion of the lens receiving surface in the optical axis O direction. Glue. After the bonding and fixing, each holding frame member is taken out of the jig 30.
【００７０】上述のようにして組み込まれた本実施形態
のズームレンズ鏡筒１において、鏡枠の進退を行う場
合、図示しない鏡筒駆動機構を介して駆動環３が反時計
回りに回転駆動され、各鏡枠が収納位置から繰り出さ
れ、それぞれ撮影可能なズームワイド位置、ズームテレ
位置に移動する。すなわち、駆動環３の回転に伴って回
転環４、および、カム環５が回転しながら繰り出され
る。回転環４とカム環５の回転により直進リング１３，
直進キー１２が回転することなく回転環４とともに前方
に繰り出される。また、さらに、直進キー１２により回
転が規制された状態で直進キーリング１４もカム環５と
ともに前方に移動する。In the zoom lens barrel 1 of the present embodiment incorporated as described above, when the lens barrel is advanced or retracted, the drive ring 3 is rotated counterclockwise via a lens barrel drive mechanism (not shown). Then, each lens frame is extended from the storage position, and moves to a zoom wide position and a zoom telephoto position where shooting is possible. That is, the rotating ring 4 and the cam ring 5 are fed while rotating as the driving ring 3 rotates. With the rotation of the rotating ring 4 and the cam ring 5, the straight running ring 13,
The straight key 12 is extended forward together with the rotary ring 4 without rotating. Further, the rectilinear key ring 14 moves forward together with the cam ring 5 in a state where the rotation is restricted by the rectilinear key 12.
【００７１】第１群レンズ４１を保持する第１群枠６
は、直進キーリング１４の直進キー部１４ｂにより回転
が規制された状態でカム環５のカム溝５ｄにより光軸Ｏ
方向前方に繰り出される。First group frame 6 holding first group lens 41
In the state where the rotation is regulated by the rectilinear key portion 14b of the rectilinear key ring 14, the optical axis O is formed by the cam groove 5d of the cam ring 5.
It is fed forward in the direction.
【００７２】Ｇ枠連結環１０とＬ枠連結環１１は、直進
キーリング１４の直進キー部１４ｂにより回転が規制さ
れた状態でそれぞれカム環５のカム溝５ｅ，５ｆにより
光軸Ｏ方向前方に繰り出される。The G frame connecting ring 10 and the L frame connecting ring 11 are extended forward in the optical axis O direction by the cam grooves 5e and 5f of the cam ring 5 in a state where the rotation is restricted by the straight key portion 14b of the straight key ring 14. It is.
【００７３】そして、第２群ガイド枠９は、第１群枠６
および第２群枠７で回転が規制された状態でＧ枠連結環
１０を介して第２群枠７とともに光軸Ｏ方向に繰り出さ
れる。また、第３群レンズ４３を保持する第３群枠８も
第２群枠７によって回転が規制された状態でＬ枠連結環
１１を介して光軸Ｏ方向に繰り出される。The second group guide frame 9 is connected to the first group frame 6.
And, with the rotation restricted by the second group frame 7, it is fed out in the optical axis O direction together with the second group frame 7 via the G frame connecting ring 10. Further, the third group frame 8 holding the third group lens 43 is also extended in the optical axis O direction via the L frame connecting ring 11 in a state where the rotation is restricted by the second group frame 7.
【００７４】上述した複数の保持枠、すなわち、第１群
枠６，第２群枠７，第３群枠８の相対移動の繰り出しに
よりレンズ鏡筒１は、撮影可能なワイド状態、あるい
は、テレ状態にそれぞれズーミングされる。The lens barrel 1 is brought into a wide-angle state or a telephoto state by the relative movement of the plurality of holding frames, that is, the first group frame 6, the second group frame 7, and the third group frame 8. Each is zoomed to a state.
【００７５】なお、上記ズーミング状態において第２群
レンズ４２を保持する第２群枠７は、第１群枠６に回転
規制された状態で第２群ガイド枠９に内蔵されるフォー
カシング駆動機構（図示せず）により第１群枠６，第３
群枠８に対する光軸Ｏ方向の合焦位置に駆動され、レン
ズ鏡筒１のフォーカシングが行われる。The second group frame 7 for holding the second group lens 42 in the zooming state is a focusing drive mechanism (built-in to the second group guide frame 9 in a state where the rotation is restricted by the first group frame 6). (Not shown), the first group frame 6, the third group frame
The lens barrel 1 is driven to a focus position in the optical axis O direction with respect to the group frame 8, and focusing of the lens barrel 1 is performed.
【００７６】以上、説明したように本実施形態のレンズ
鏡筒１によれば、カムフォロアが固着されるＧ枠連結環
１０，Ｌ枠連結環１１が上記カムフォロアを介して進退
駆動される第２群ガイド枠９，第３群枠８に対して分離
されて構造を適用していることからレンズ鏡筒の組み立
てが容易である。そして、上記Ｇ枠連結環１０，Ｌ枠連
結環１１が第２群ガイド枠９，第３群枠８に対して上述
した嵌合部の相対移動手段によりその進退移動方向（光
軸Ｏ方向）に対して直交する面内で相対的移動可能な浮
動状態で支持されている。したがって、上記Ｇ枠連結環
１０、または、Ｌ枠連結環１１をカム環５にそれぞれ周
方向で精密嵌合させ、同時に、第２群ガイド枠９、また
は、第３群枠８を第２群枠７に対してそれぞれ周方向で
精密嵌合させたとしても第２群ガイド枠９や第３群枠８
に無理な力が作用することがないので、第２群枠７や第
３群枠８に保持される各レンズ群の芯合致精度を低下さ
せることなく、また、各鏡枠の進退もスムーズに行え
る。また、その組み立て性も向上する。As described above, according to the lens barrel 1 of the present embodiment, the second group in which the G frame connecting ring 10 and the L frame connecting ring 11 to which the cam followers are fixed are driven forward and backward through the cam followers. Since the structure is applied separately to the guide frame 9 and the third group frame 8, assembly of the lens barrel is easy. The G frame connecting ring 10 and the L frame connecting ring 11 are moved forward and backward (in the direction of the optical axis O) with respect to the second group guide frame 9 and the third group frame 8 by the relative moving means of the fitting portion described above. Are supported in a floating state which can be relatively moved in a plane perpendicular to the plane. Therefore, the G frame connection ring 10 or the L frame connection ring 11 is precisely fitted to the cam ring 5 in the circumferential direction, and at the same time, the second group guide frame 9 or the third group frame 8 is moved to the second group. Even if the second group guide frame 9 and the third group frame 8 are precisely fitted in the frame 7 in the circumferential direction, respectively.
Since no excessive force acts on the lens units, the precision of alignment of the lens groups held by the second and third lens groups 7 and 8 is not reduced, and the lens frames are smoothly advanced and retracted. I can do it. In addition, the assemblability is improved.
【００７７】なお、上述の実施形態におけるレンズの保
持枠部材への固定方法は、接着剤による接着としたが、
これに限らず、例えば、溶着や機械的固定方法を適用し
てレンズを保持枠部材に固着する場合にも本発明の要旨
は適用可能である。The method of fixing the lens to the holding frame member in the above-described embodiment is adhesion by an adhesive.
The gist of the present invention is not limited to this, and the gist of the present invention can be applied, for example, to a case where the lens is fixed to the holding frame member by applying welding or a mechanical fixing method.
【００７８】また、上述の実施形態におけるレンズ組み
立て治具を用いてレンズを保持枠部材に接着する場合、
上記治具に保持枠部材を先に取り付けたが、鏡枠の構造
によっては、上記治具にレンズ群を先に装着し、そこで
保持枠部材を治具に取り付けて接着を行うようにするこ
とも可能である。When the lens is adhered to the holding frame member using the lens assembly jig in the above embodiment,
Although the holding frame member is attached to the jig first, depending on the structure of the lens frame, a lens group may be attached to the jig first, and then the holding frame member may be attached to the jig for bonding. Is also possible.
【００７９】[0079]
【発明の効果】上述のように本発明によれば、組み立て
性がよく、各枠部材の芯ずれが少なく、精度の高い鏡筒
装置を提供できる。As described above, according to the present invention, it is possible to provide a lens barrel device with good assemblability, little misalignment of each frame member, and high accuracy.
【図１】本発明の一実施形態の鏡筒装置であるズームレ
ンズ鏡筒の一部の分解斜視図。FIG. 1 is an exploded perspective view of a part of a zoom lens barrel which is a lens barrel device according to an embodiment of the present invention.
【図２】上記一実施形態のズームレンズ鏡筒の他の一部
の分解斜視図。FIG. 2 is an exploded perspective view of another part of the zoom lens barrel according to the embodiment.
【図３】上記一実施形態のズームレンズ鏡筒のさらに他
の一部の分解斜視図。FIG. 3 is an exploded perspective view of still another part of the zoom lens barrel according to the embodiment.
【図４】上記一実施形態のズームレンズ鏡筒の鏡枠繰り
出し状態における縦断面図。FIG. 4 is a longitudinal sectional view of the zoom lens barrel according to the embodiment in a state in which the lens barrel is extended.
【図５】上記一実施形態のズームレンズ鏡筒の第１群枠
と第２群枠の嵌合状態を示す光軸直交断面図。FIG. 5 is an optical axis orthogonal cross-sectional view showing a fitted state of a first group frame and a second group frame of the zoom lens barrel according to the embodiment.
【図６】上記一実施形態のズームレンズ鏡筒の第１群枠
と第２群枠の収納状態での舌片部解放状態を示す部分拡
大図である。FIG. 6 is a partially enlarged view showing a state in which a tongue piece is released when the first group frame and the second group frame of the zoom lens barrel according to the embodiment are housed;
【図７】上記一実施形態のズームレンズ鏡筒のＧ枠連結
環周りの嵌合状態を示す拡大部分断面図。FIG. 7 is an enlarged partial cross-sectional view showing a fitted state of the zoom lens barrel according to the embodiment around a G frame connecting ring.
【図８】上記一実施形態のズームレンズ鏡筒のＬ枠連結
環周りの嵌合状態を示す拡大部分断面図。FIG. 8 is an enlarged partial cross-sectional view showing a fitted state around the L-frame connecting ring of the zoom lens barrel according to the embodiment.
【図９】上記一実施形態のズームレンズ鏡筒のレンズ組
み立て治具と各保持枠部材と各レンズ群の分解斜視図の
一部。FIG. 9 is a part of an exploded perspective view of a lens assembly jig, each holding frame member, and each lens group of the zoom lens barrel according to the embodiment.
【図１０】上記一実施形態のズームレンズ鏡筒のレンズ
組み立て治具と各保持枠部材と各レンズ群の分解斜視図
の他の一部。FIG. 10 is another exploded perspective view of the lens assembly jig, each holding frame member, and each lens group of the zoom lens barrel according to the embodiment.
【図１１】上記一実施形態のズームレンズ鏡筒のレンズ
組み立て治具で各保持枠部材およびレンズを保持した状
態での縦断面図。FIG. 11 is a longitudinal sectional view of the zoom lens barrel according to the embodiment in a state where each holding frame member and the lens are held by a lens assembly jig.
５ ……カム環（カム部材） ７ ……第２群枠（案内部材） ８ ……第３群枠（移動枠） ８ａ……外周溝（移動機構，相対移動手段） ９ ……第２群ガイド枠（移動枠） ９ａ……外周溝（移動機構，相対移動手段） １０ ……Ｇ枠連結環（支持部材，移動部材） １０ａ……カムフォロア １０ｂ……突起（移動機構，相対移動手段） １１ ……Ｌ枠連結環（支持部材，移動部材） １１ａ……カムフォロア １１ｂ……突起（移動機構，相対移動手段） １４ ……直進リング（案内部材） 5 Cam ring (cam member) 7 Second group frame (guiding member) 8 Third group frame (moving frame) 8a Outer peripheral groove (moving mechanism, relative moving means) 9 second group Guide frame (moving frame) 9a ... Outer peripheral groove (moving mechanism, relative moving means) 10 ... G frame connecting ring (supporting member, moving member) 10a ... Cam follower 10b ... Projection (moving mechanism, relative moving means) 11 ... L-frame connecting ring (supporting member, moving member) 11a... Cam follower 11b... Protrusion (moving mechanism, relative moving means) 14.
─────────────────────────────────────────────────────
────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成１３年４月９日（２００１．４．９）[Submission date] April 9, 2001 (2001.4.9)
【手続補正１】[Procedure amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００２６[Correction target item name] 0026
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００２６】上記第２群枠７の３つの直進ガイド部７a
1，７a2のうち、上方に位置する２つのガイド部７a1の
前方端部に切り込みが入った弾性手段としての舌片部７
ｂが上記２つの直進ガイド部７a1に設けられている。そ
の舌片部７ｂは、径方向に弾性変形が可能であり、外周
側に小突起部７ｇを有する。The three linear guide portions 7a of the second group frame 7
A tongue piece 7 as a resilient means having a notch at the front end of the two guide parts 7a1 located at the upper part of 1, 7a2.
b is provided on the two linear guide portions 7a1 . The tongue piece 7b is elastically deformable in the radial direction, and has a small protrusion 7g on the outer peripheral side.
【手続補正２】[Procedure amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００４１[Correction target item name] 0041
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００４１】上記第３群枠８は、円環部材であって、後
方外周に沿って外周溝８ａと、突起挿通用切り欠き８ｂ
と、上述するレンズ組み立て治具３０が挿通される３つ
の治具挿通開口部８ｃと、上記開口部８ｃを避けた部分
に３分割されたレンズ保持内周部８ｇ，８ｈ，８ｉ（図
４参照）と、上記第２群枠７の外周部７ｍに精密嵌合す
る内周部８ｄと、上記内周部８ｄ上の上方部に一体的に
設けられ、径方向に弾性変形可能な２つの弾性手段とし
ての舌片部８ｅと、第２群枠７に対して回転防止のた
め、内周部８ｄに設けられ、上記ピン７ｒと係合摺動す
る直進溝８ｊとが設けられている。The third group frame 8 is an annular member, and has an outer peripheral groove 8a and a protrusion insertion notch 8b along the rear outer periphery.
In addition, three jig insertion openings 8c through which the above-described lens assembly jig 30 is inserted, and lens holding inner peripheral portions 8g, 8h, and 8i divided into three portions avoiding the openings 8c (see FIG. 4). ) and the inner peripheral portion 8d of precisely fitted to the outer peripheral portion 7m of the second group frame 7, integrally to the upper portion on the inner peripheral portion 8d
The tongue piece 8e is provided as two elastic means capable of being elastically deformed in the radial direction, and is provided on the inner peripheral portion 8d for preventing rotation with respect to the second group frame 7, and is engaged with the pin 7r. A moving straight groove 8j is provided.
【手続補正３】[Procedure amendment 3]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００５１[Correction target item name] 0051
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００５１】すなわち、上記内周面８ｄを形成する筒部
にその内径側に少しばかり突出するように舌片部８ｅを
配設し、その舌片部８ｅを第２群枠７の外周面７ｍに当
接させる。上記舌片部８ｅの弾性変形による付勢力によ
り第２群枠７に対して第３群枠８を相対的に上方に片寄
せして嵌合ガタを取り除いている。なお、上記ガタ取り
機構によりガタ取りを行った場合、枠に装着されるレン
ズの芯ずれが生じる可能性があるが、そのずれは、枠に
装着されるレンズの外径とレンズ保持内周部８ｇ，８
ｈ，８ｉの隙間を所定量に取り、後述するレンズ組み立
て治具を用いて位置決めし、固着することでレンズ芯ず
れが補正される。That is, a tongue piece 8e is arranged on the cylindrical portion forming the inner peripheral surface 8d so as to slightly project toward the inner diameter side, and the tongue piece 8e is attached to the outer peripheral surface 7m of the second group frame 7. Contact. The third group frame 8 is biased relatively upward with respect to the second group frame 7 by the biasing force due to the elastic deformation of the tongue piece 8e to remove the fitting play. When the play is performed by the above-described play removing mechanism, there is a possibility that the center of the lens mounted on the frame may be misaligned. 8g, 8
The gap between h and 8i is set to a predetermined amount, positioned using a lens assembling jig described later, and fixed to correct the lens misalignment.
Claims (4)
向と直交する平面内で相対移動可能な相対移動部材と、 を有することを特徴とする鏡筒装置。A moving frame; a cam follower for moving the moving frame; and a relative moving member integrally movable with the plurality of cam followers in a plane orthogonal to a moving direction of the moving frame. A lens barrel device comprising:
面内で相対的移動を可能とするように上記支持部材を移
動可能とさせるため、上記支持部材と上記移動枠とで構
成される相対移動機構と、 を有することを特徴とする鏡筒装置。2. A moving frame, a cam follower for moving the moving frame, a support member for integrally supporting the cam follower, and a plane perpendicular to a moving direction of the moving frame with respect to the moving frame. A lens barrel device comprising: a relative moving mechanism configured by the support member and the moving frame to enable the support member to move so as to allow relative movement.
材と、 上記カムフォロアを支持する支持部材と、 上記カムフォロアが上記カム溝と係合して決定される上
記移動枠の移動方向と直交する平面内の上記支持部材の
位置と、他の枠との嵌合で決定される上記移動枠の移動
方向と直交する平面内の上記移動枠の位置との相対位置
が自在となるように、上記移動枠と上記支持部材との相
対移動を可能とさせるための相対移動手段と、 を有することを特徴とする鏡筒装置。3. A moving frame, a cam follower for moving the moving frame, a cam member having a cam groove with which the cam follower engages and slides, a support member for supporting the cam follower, and the cam follower being the cam groove. And the position of the support member in a plane orthogonal to the moving direction of the moving frame determined by engaging with the moving frame in a plane orthogonal to the moving direction of the moving frame determined by fitting with another frame. A lens barrel device, comprising: relative moving means for enabling relative movement between the moving frame and the support member such that the relative position with respect to the position of the moving frame is free.
動枠と一体的に移動する支持部材と、 上記カムフォロアが係合摺接するカム溝を有するカム部
材と、 上記カムフォロアが上記カム部材の上記カム溝と係合し
て上記移動枠を上記移動の方向に移動させるため、上記
カム溝と協同して上記支持部材を上記移動の方向に移動
させる案内部材と、 上記移動の方向と直交する平面内における上記支持部材
の位置と、上記移動の方向と直交する平面内における上
記移動枠の位置との相対位置を自在に決定可能なよう
に、上記移動枠と上記支持部材との相対的移動可能とさ
せるための相対移動手段と、 を有することを特徴とする鏡筒装置。4. A moving frame, a cam follower for moving the moving frame, a support member that supports the cam follower, and moves integrally with the moving frame in the direction of the movement, A cam member having a cam groove in contact therewith, the cam follower engaging with the cam groove of the cam member to move the moving frame in the direction of the movement, so that the support member is moved in cooperation with the cam groove. Guide member for moving in the direction of the above, the relative position between the position of the support member in a plane orthogonal to the direction of the movement and the position of the moving frame in a plane orthogonal to the direction of the movement can be freely determined. And a relative moving means for enabling relative movement between the moving frame and the support member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000276951A JP2002090609A (en) | 2000-09-12 | 2000-09-12 | Lens barrel device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000276951A JP2002090609A (en) | 2000-09-12 | 2000-09-12 | Lens barrel device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002090609A true JP2002090609A (en) | 2002-03-27 |
Family
ID=18762342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000276951A Withdrawn JP2002090609A (en) | 2000-09-12 | 2000-09-12 | Lens barrel device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002090609A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013080001A (en) * | 2011-09-30 | 2013-05-02 | Fujifilm Corp | Lens device and imaging device |
| JP2016110006A (en) * | 2014-12-10 | 2016-06-20 | キヤノン株式会社 | Lens barrel and optical apparatus including the same |
-
2000
- 2000-09-12 JP JP2000276951A patent/JP2002090609A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013080001A (en) * | 2011-09-30 | 2013-05-02 | Fujifilm Corp | Lens device and imaging device |
| JP2016110006A (en) * | 2014-12-10 | 2016-06-20 | キヤノン株式会社 | Lens barrel and optical apparatus including the same |
| US10197764B2 (en) | 2014-12-10 | 2019-02-05 | Canon Kabushiki Kaisha | Lens barrel and optical apparatus having the same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20071204 |