JPH01219810A - Zoom lens barrel - Google Patents
Zoom lens barrelInfo
- Publication number
- JPH01219810A JPH01219810A JP63044546A JP4454688A JPH01219810A JP H01219810 A JPH01219810 A JP H01219810A JP 63044546 A JP63044546 A JP 63044546A JP 4454688 A JP4454688 A JP 4454688A JP H01219810 A JPH01219810 A JP H01219810A
- Authority
- JP
- Japan
- Prior art keywords
- ring
- cam
- optical axis
- focusing
- axis direction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 79
- 230000002093 peripheral effect Effects 0.000 abstract description 8
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 230000033001 locomotion Effects 0.000 description 24
- 230000005540 biological transmission Effects 0.000 description 7
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Lens Barrels (AREA)
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
本発明は、変倍操作時に共に光軸方向に移動する変倍光
学系および合焦光学系を有すると共に、変倍操作時に光
軸方向に直進して変倍光学系を光軸方向に移動させるた
めの外部操作部材を備えたズームレンズ鏡筒に関し、よ
り詳細には外部操作部材と一体的に光軸方向に移動する
中間筒と固定筒との構造関係の改良に関する。Detailed Description of the Invention (Field of Industrial Application) The present invention has a variable power optical system and a focusing optical system that move together in the optical axis direction during a variable power operation, and also includes a variable power optical system and a focusing optical system that move together in the optical axis direction during a variable power operation. Regarding a zoom lens barrel equipped with an external operating member for moving the variable magnification optical system in the optical axis direction in a straight line, more specifically, an intermediate barrel and a fixed barrel that move in the optical axis direction integrally with the external operating member. Regarding the improvement of the structural relationship between
(従来の技術)
従来この種のズームレンズ鏡筒においては、例えば第5
図に示すような構造のものが知られている(特願昭62
−298680号)。(Prior Art) Conventionally, in this type of zoom lens barrel, for example, the fifth
The structure shown in the figure is known (Japanese Patent Application No. 62
-298680).
第5図において、固定筒51は、その内周部51gで固
定レンズ群L3を保持している。固定筒51には光軸方
向に延在する突出部51fを備えている。またその突出
部51fの内側には1群摺動環57及び2.4群保持環
62が嵌合している。2.4群保持環62は変倍レンズ
群L2 、Ls を保持している。 前記固定筒51の
被写体側先端には係合突起51bが設けられていて、固
定筒51の外側に配置された変倍操作環52に設けられ
ている直進溝52aに嵌入している。変倍操作環52は
前記係合51b、52aの為に光軸方向に直進する。In FIG. 5, the fixed barrel 51 holds the fixed lens group L3 at its inner peripheral portion 51g. The fixed barrel 51 is provided with a protrusion 51f extending in the optical axis direction. Furthermore, a first group sliding ring 57 and a second and fourth group holding ring 62 are fitted inside the protruding portion 51f. The 2.4 group holding ring 62 holds variable power lens groups L2 and Ls. An engaging protrusion 51b is provided at the object-side end of the fixed barrel 51, and is fitted into a rectilinear groove 52a provided in a variable magnification operation ring 52 disposed outside the fixed barrel 51. The variable power operation ring 52 moves straight in the optical axis direction due to the engagements 51b and 52a.
変倍操作環52は中間筒56にビス止めによって一体化
されているので中間筒56も−・体となって光軸方向に
直進する。中間筒56の被写体側内周部56dは、固定
筒突出部51fとカム環60の外側で、1群摺動環57
よりボディ側へ突出する突出部57bと嵌合している。Since the variable power operation ring 52 is integrated with the intermediate cylinder 56 by screwing, the intermediate cylinder 56 also moves straight in the optical axis direction as a body. The subject-side inner peripheral portion 56d of the intermediate cylinder 56 is located outside the fixed cylinder protrusion 51f and the cam ring 60, and is connected to the first group sliding ring 57.
It fits into a protrusion 57b that protrudes further toward the body.
また中間筒56の前記内周部56dの外周には細目ネジ
56bが設けられていて、合焦調節環53のボディ側内
周に設けである細目ネジ53bと螺合している0合焦?
J4節環53は中間筒56に対して回転可能である。Further, a fine thread 56b is provided on the outer periphery of the inner peripheral portion 56d of the intermediate cylinder 56, and is screwed into a fine thread 53b provided on the inner periphery of the focusing adjustment ring 53 on the body side.
The J4 node ring 53 is rotatable with respect to the intermediate cylinder 56.
1群保持環61はその内側に合焦レンズ群L!を保持し
ている。1群保持環61はその外周のボディ側端部に係
合突起61aが設けられていて、前記合焦調節環53の
内周に設けられた溝53aに嵌入している。1f!保持
環61のボディ側内周部にはヘリコイドネジ61bが設
けられていて、1群摺動環57の外周の被写体側端部に
設けられているヘリコイドネジ57aと螺合している。The first group holding ring 61 has a focusing lens group L inside it! is held. The first group holding ring 61 is provided with an engaging protrusion 61 a on the body side end of its outer periphery, and is fitted into a groove 53 a provided on the inner periphery of the focusing adjustment ring 53 . 1f! A helicoid screw 61b is provided on the inner circumference of the holding ring 61 on the body side, and is screwed into a helicoid screw 57a provided on the outer circumference of the first group sliding ring 57 on the subject side.
1群保持環61は1群摺動筒57に対して回転可境であ
る。1群保持環61の外周の被写体側先端にはフード取
り付けの為のバヨネット部6Lcが設けられている。The first group holding ring 61 is rotatable with respect to the first group sliding cylinder 57. A bayonet portion 6Lc for attaching a hood is provided at the object-side end of the outer periphery of the first group holding ring 61.
前記カム環60にはカムピン58が植設されていて、カ
ム環60の外側で中間筒56より突出する突出部56c
に設けられたカム溝56aに嵌入している。カムピン5
8とカム溝56aとが係合することによって変倍操作部
材52.56の光軸方向の移動はカム環6oの光軸回り
の回転に変換される。A cam pin 58 is implanted in the cam ring 60, and a protrusion 56c protrudes from the intermediate cylinder 56 on the outside of the cam ring 60.
It fits into a cam groove 56a provided in the cam groove 56a. Cam pin 5
8 and the cam groove 56a, the movement of the variable power operation member 52, 56 in the optical axis direction is converted into rotation of the cam ring 6o about the optical axis.
1群摺動環57の摺動部57cにカムピン63が植設さ
れていて、固定筒51の突出部51fに設けられた直進
溝51cとその外側のカム環60に設けられたカム溝6
0bに嵌入している。このようにカムピン63、直進溝
51c、カム溝60bが係合することによって、カム環
60の光軸回りの回転を1群摺動環57の光軸方向の移
動へ変換している。A cam pin 63 is implanted in the sliding portion 57c of the first group sliding ring 57, and a cam groove 6 is provided in the straight groove 51c provided in the protruding portion 51f of the fixed barrel 51 and the cam ring 60 on the outside thereof.
It is inserted into 0b. By engaging the cam pin 63, the linear groove 51c, and the cam groove 60b in this manner, rotation of the cam ring 60 about the optical axis is converted into movement of the first group sliding ring 57 in the optical axis direction.
2群保持環62の摺動部62aにカムピン59が植設さ
れていて、固定筒51の突出部51fに設けられた直進
溝51dと、その外側のカム環60に設けられたカム溝
60aに嵌入している。カムピン59、直進溝51d及
びカム溝60&の保合によって、カム環60の光軸回り
の回転を2.4群摺動環62の光軸方向の移動へ変換し
ている。A cam pin 59 is implanted in the sliding portion 62a of the second group holding ring 62, and is inserted into a straight groove 51d provided in the protruding portion 51f of the fixed barrel 51 and a cam groove 60a provided in the cam ring 60 on the outside thereof. It is embedded. The engagement of the cam pin 59, the linear groove 51d, and the cam groove 60& converts the rotation of the cam ring 60 around the optical axis into movement of the 2.4 group sliding ring 62 in the optical axis direction.
固定筒51の突出部51fにピン64が植設されていて
、カム環60に設けられた円周溝60cに嵌入していて
、カム環60の光軸方向の移動は規制されている。A pin 64 is implanted in the protrusion 51f of the fixed barrel 51, and is fitted into a circumferential groove 60c provided in the cam ring 60, thereby restricting movement of the cam ring 60 in the optical axis direction.
上記構成のレンズ鏡筒において、変倍操作は、変倍操作
部材52.56又は変倍操作部材52.56と変倍操作
時の光軸方向の移動に関しては一体である合焦調節環5
3を保持して、光軸方向に移動させて行なう。In the lens barrel configured as described above, the zooming operation is performed using the zooming operation member 52.56 or the focusing adjustment ring 5, which is integrated with the zooming operation member 52.56 in terms of movement in the optical axis direction during the zooming operation.
3 and move it in the optical axis direction.
この操作によって中間筒56が直進するので、カム環6
0は、ビン64、円周溝60cとの係合によって光軸方
向の移動を規制されて、カムピン58とカム溝56aと
の保合によって、光軸回りに回転する。カム環60が光
軸回りに回転すると、カムピン63、直進溝51c及び
カム溝60bの係合によって、1群摺動環57は直進し
、1群摺動環57と変倍操作時の光軸方向の移動に関し
ては一体である1群保持部材61も直進して、合焦レン
ズ群Ll を所定の位置に移動させる。This operation causes the intermediate cylinder 56 to move straight, so the cam ring 6
0 is restricted from moving in the optical axis direction by engagement with the pin 64 and the circumferential groove 60c, and rotates around the optical axis by engagement between the cam pin 58 and the cam groove 56a. When the cam ring 60 rotates around the optical axis, the first group sliding ring 57 moves straight due to the engagement of the cam pin 63, the straight groove 51c, and the cam groove 60b, and the first group sliding ring 57 and the optical axis during magnification changing operation move in a straight line. Regarding movement in the direction, the first group holding member 61, which is integral, also moves straight to move the focusing lens group Ll to a predetermined position.
同様に、カム環60が光軸回りに回転すると、カムビン
59、直進溝51dおよびカム溝60aの保合により、
2.4群保持環62は直進して、変倍レンズ群L2 、
Ls を所定の位置に移動させる。変倍操作時に1郡部
材Ll、61.57と変倍部材53.56.52の移動
の速さが同じでなく、両者の相対位置が近づくので、両
者間に間隔文3〜交もが設けてあり、また1群保持環6
1と合焦調節環53は光軸方向に伸びる溝53aと係合
突起61aによって係合していて、変倍操作部材52.
56の光軸方向の移動に際して1群保持環61が一体と
なって移動しないようになっている。Similarly, when the cam ring 60 rotates around the optical axis, due to the engagement of the cam bin 59, the linear groove 51d, and the cam groove 60a,
The 2.4 group holding ring 62 moves straight to the variable magnification lens group L2,
Move Ls to a predetermined position. During the magnification change operation, the moving speeds of the first group member Ll, 61.57 and the magnification change member 53, 56, 52 are not the same, and their relative positions approach each other, so an interval 3~intersection is provided between them. There is also a 1st group retaining ring 6
1 and the focusing adjustment ring 53 are engaged with each other by a groove 53a extending in the optical axis direction and an engaging protrusion 61a, and the zooming operation member 52.
56 in the optical axis direction, the first group holding ring 61 does not move together.
合焦操作は合焦調節環53を光軸回りに回転させて行な
う。The focusing operation is performed by rotating the focusing adjustment ring 53 around the optical axis.
合焦y4節環53が回転すると、カム溝61aと溝53
aとの係合によって、1群保持環61が回転し、この1
群保持環61は1群摺動環57に対してヘリコイドネジ
57a、61bで保持されているので、光軸方向に移動
し、合焦レンズ群L+ を合焦位置に移動させる。When the focus y4 joint ring 53 rotates, the cam groove 61a and the groove 53
The first group holding ring 61 rotates due to the engagement with
Since the group holding ring 61 is held by the helicoid screws 57a and 61b with respect to the first group sliding ring 57, it moves in the optical axis direction and moves the focusing lens group L+ to the focusing position.
(発明が解決しようとする課題)
前記の従来のレンズ鏡筒においては以下のような解決す
べき課題がある。(Problems to be Solved by the Invention) The conventional lens barrel described above has the following problems to be solved.
変倍操作部材52.56は1群摺動環57と内周部56
dにて嵌合しているが、その嵌合長が短いために、変倍
操作部材52.56のガタッキが大きくなり、良好な操
作感が得られない。The variable magnification operation members 52 and 56 include a first group sliding ring 57 and an inner circumferential portion 56.
Although they are fitted at point d, since the fitting length is short, the variable magnification operation members 52 and 56 have a large play, and a good operating feeling cannot be obtained.
また変倍操作時に前記内周部56dは1群摺動環57の
突出部57bと摺動するが、前記変倍操作部材52.5
6のガタ付きの為に、両者がせりあって、まさつ力が増
大し、変倍操作の力量が大きくなり、円滑に操作するこ
とができなかった。Further, during the zooming operation, the inner peripheral portion 56d slides on the protruding portion 57b of the first group sliding ring 57, but the zooming operation member 52.5
Due to the rattling of the lens 6, the two pressed against each other, increasing the force required to change the magnification, making it impossible to operate smoothly.
また中間筒56は、合焦調節環53に固設され、自動合
焦時の駆動力伝達の為の伝達キー55の光軸回りの回転
範囲をにげるために、切り欠き56eが設けてあり、さ
らにその内周の突出部56cにカムが設けられているの
で、形状が複雑となり、加工が困難で、カムの精度も確
保しにくい。Further, the intermediate cylinder 56 is fixed to the focusing adjustment ring 53, and is provided with a notch 56e in order to reduce the rotation range around the optical axis of the transmission key 55 for transmitting driving force during automatic focusing. Furthermore, since a cam is provided on the protruding portion 56c on the inner circumference, the shape is complicated, machining is difficult, and it is difficult to ensure the accuracy of the cam.
またこの中間筒56は切り欠きが多いので。Also, this intermediate cylinder 56 has many notches.
その強度が弱くなっており、中間筒56の外周部56f
を強く保持すると、その近くに設けられた細目ネジ56
bが変形して、合焦調節環53の作動が不良になり、自
動合焦時には合焦動作が途中で中断してしまうことがあ
った。Its strength is weakened, and the outer peripheral portion 56f of the intermediate cylinder 56
If you hold firmly, the fine screw 56 provided near it will open.
b is deformed, the operation of the focusing adjustment ring 53 becomes defective, and the focusing operation is sometimes interrupted during automatic focusing.
1群保持部材61の先端のバヨネット部61cにフード
65を装着した状態を第4b図に示す、この状態で、焦
点調節環53を保持して操作を行なうとき、指の位置が
焦点調節環53の中央のG(破線の楕円)の位置ではな
く、先端G′(実線の楕円)の位置にあると、フード6
5の傾斜部65aに指が当ってしまう、このレンズ鏡筒
は変倍操作時には1群部材I、+、57.61と変倍操
作部材52.56の間隔!14 (第5図図示)が減少
するのだが、この変倍操作時に合焦操作環53を把持し
て光軸方向に操作しようとした場合に、指が先端G。FIG. 4b shows a state in which the hood 65 is attached to the bayonet portion 61c at the tip of the first group holding member 61. In this state, when the focus adjustment ring 53 is held and operated, the position of the finger is not on the focus adjustment ring 53. If the hood 6 is located at the tip G' (solid ellipse) instead of at the center G (dashed ellipse),
5, the distance between the 1st group member I, +, 57.61 and the variable magnification operation member 52.56 is too large for this lens barrel when the variable magnification operation is performed. 14 (shown in FIG. 5), but if you grip the focusing operation ring 53 and try to operate it in the optical axis direction during this magnification change operation, your finger will touch the tip G.
の位置にあると、合焦調節環53とフード65を同時に
おさえこんでいるために前記間隔交4をかえることがで
きず、変倍操作ができなくなる。In this position, since the focus adjustment ring 53 and the hood 65 are held down at the same time, the distance 4 cannot be changed, and the magnification cannot be changed.
また合焦操作においても第5図における間隔文4が減少
する方向に、合焦調節環53を回転させると、指が間隔
見4にはさまれ、円滑な合焦操作ができなくなる恐れが
ある。Furthermore, during focusing operations, if the focusing adjustment ring 53 is rotated in the direction in which the distance indicator 4 in FIG. .
また可動部材57の上に中間筒56があり、そのためガ
タ付きが大きい欠点もある。Furthermore, the intermediate cylinder 56 is located above the movable member 57, which also has the drawback of large play.
したがって、本発明の目的は、中間筒56のガタッキを
なくして、変倍操作がしやすく、確実な変倍操作ができ
るズームレンズ鏡筒を提供することである。Accordingly, an object of the present invention is to provide a zoom lens barrel that eliminates the backlash of the intermediate barrel 56 and allows easy and reliable zooming operations.
(課題を解決するための手段)
以上の目的を達成するために、本発明のズームレンズ鏡
筒は、
変倍操作時に共に光軸方向に移動する変倍光学系(L2
、L4)および合焦光学系(Ll)を有すると共に、
変倍操作時に光軸方向に直進して該変倍光学系を光軸方
向に移動させるための外部操作部材(2)を備えたズー
ムレンズ鏡筒において、
固定筒(1)と、
該変倍光学系を保持する保持環(12)と、該保持環に
作動連結されていると共に該外部操作部材と一体的に光
軸方向に直進する中間筒(6)と、
該外部操作部材と連動すると共に該合焦光学系を移動さ
せるための摺動環(7)と、から成り、該中間筒は該固
定筒に嵌合長を長くとってその内側に嵌合されており、
該中間筒の内側には更に該摺動環および該保持環が嵌合
されていることを特徴としている。(Means for Solving the Problems) In order to achieve the above object, the zoom lens barrel of the present invention includes a variable power optical system (L2) that moves in the optical axis direction during a variable power operation.
, L4) and a focusing optical system (Ll),
A zoom lens barrel equipped with an external operation member (2) for moving the variable power optical system in the optical axis direction by moving straight in the optical axis direction during a variable power operation, comprising: a fixed barrel (1); A retaining ring (12) that holds the optical system; an intermediate cylinder (6) that is operatively connected to the retaining ring and moves straight in the optical axis direction integrally with the external operating member; and interlocking with the external operating member. and a sliding ring (7) for moving the focusing optical system, and the intermediate cylinder is fitted inside the fixed cylinder with a long fitting length,
The sliding ring and the holding ring are further fitted inside the intermediate cylinder.
(作用)
以上のように構成した本発明によれば、中間筒を固定筒
の内側に十分な嵌合長を取って嵌合させたので、変倍操
作部材のガタッキを防止できる。また、中間筒の内側に
摺動環及び保持環を嵌合させたので、光学系の倒れが小
さくなり、光学性能が保たれる。(Function) According to the present invention configured as described above, since the intermediate cylinder is fitted inside the fixed cylinder with a sufficient fitting length, shaking of the variable power operation member can be prevented. Furthermore, since the sliding ring and the retaining ring are fitted inside the intermediate cylinder, the tilting of the optical system is reduced, and optical performance is maintained.
(実施例)
以下本発明の一実施例を添付図面を参照して詳細に説明
する。尚、図面において同一部分は同一符号で示しであ
る。(Embodiment) An embodiment of the present invention will be described below in detail with reference to the accompanying drawings. In the drawings, the same parts are indicated by the same reference numerals.
第1図は、本発明の一実施例を示すズームレンズ鏡筒の
縦断面図である。固定筒lの光軸方向の一端部はレンズ
鏡筒を不図示のカメラ本体へ取り付けるために設けられ
たマウント部laとなっている。固定筒lの内周部には
保持枠1hが設けられており、固定レンズ群L3が保持
されている。固定筒lは更に、光軸方向で被写体側へと
延在する環状の突出部1fを備えており、突出部1fの
半径方向外側にはカム環lOが嵌合している。FIG. 1 is a longitudinal sectional view of a zoom lens barrel showing one embodiment of the present invention. One end of the fixed barrel l in the optical axis direction is a mount part la provided for attaching the lens barrel to a camera body (not shown). A holding frame 1h is provided on the inner circumference of the fixed barrel l, and holds the fixed lens group L3. The fixed barrel 1 further includes an annular protrusion 1f extending toward the subject in the optical axis direction, and a cam ring 10 is fitted on the radially outer side of the protrusion 1f.
変倍操作環2は、固定筒lの外側に配置されており、こ
の変倍操作環2には、中間筒6がビス留めなどにより一
体的に固定されている。The variable power operation ring 2 is disposed outside the fixed tube 1, and the intermediate tube 6 is integrally fixed to the variable power operation ring 2 by screws or the like.
従って、変倍操作環2を光軸方向に直進させると、中間
筒6も同様に移動する。中間筒6は、その内周部におい
て一体に延在する円筒形の摺動部6aで固定筒lの突出
部ifの内側に嵌合しており、この摺動部6aは、変倍
操作部材2及び中間筒6のガタッキを防止出来るように
嵌合長として十分な長さが確保されている。摺動部6a
には、カムピン8が植設されている。Therefore, when the variable power operation ring 2 is moved straight in the optical axis direction, the intermediate tube 6 is also moved in the same way. The intermediate cylinder 6 has a cylindrical sliding part 6a that extends integrally at its inner circumference and fits inside the protruding part if of the fixed cylinder l, and this sliding part 6a is connected to the variable magnification operation member. A sufficient length is ensured as the fitting length to prevent the 2 and intermediate cylinders 6 from wobbling. Sliding part 6a
A cam pin 8 is installed in the cam pin 8.
カムピン8は、固定筒1に設けられた直進溝le及び固
定筒1の外側に嵌合するカム環10に設けられたカム溝
10cと係合している。従って、中間筒6は、直進溝1
eとカムピン8との係合により回転不能の状態にされて
いるので、変倍操作部材、すなわち変倍操作環2及び中
間筒6は、光軸方向にのみ移動できるだけであり、回転
方向の移動については規制されている。また、カムピン
8とカム溝10cとの係合によって、変倍操作環2及び
中間筒6の光軸方向への移動量はカム溝10cを介して
カム環10の回転方向に移動量として変換される。The cam pin 8 engages with a straight groove le provided in the fixed barrel 1 and a cam groove 10c provided in a cam ring 10 that fits on the outside of the fixed barrel 1. Therefore, the intermediate cylinder 6 has the straight groove 1
e and the cam pin 8, so that the variable power operation members, that is, the variable power operation ring 2 and the intermediate tube 6, can only move in the optical axis direction, and cannot be moved in the rotational direction. are regulated. Furthermore, due to the engagement between the cam pin 8 and the cam groove 10c, the amount of movement of the variable power operation ring 2 and the intermediate cylinder 6 in the optical axis direction is converted into the amount of movement in the rotational direction of the cam ring 10 via the cam groove 10c. Ru.
中間筒6の外周側には、更にヘリコイド部6bが設けら
れており、合焦TR節環3の端部内周に設けられたヘリ
コイド部3bと螺合している。従って、この両者の螺合
によって、合焦調節環3は中間筒6に保持されている0
合焦鋼節環3の被写体側端部外周にはレンズフードなど
の附属量取り付は部としてのバヨネット部3Cが設けら
れている。A helicoid portion 6b is further provided on the outer circumferential side of the intermediate cylinder 6, and is screwed into a helicoid portion 3b provided on the inner circumference of the end of the focusing TR segment ring 3. Therefore, by screwing these two together, the focusing adjustment ring 3 is held in the intermediate cylinder 6.
A bayonet portion 3C is provided on the outer periphery of the object-side end of the focusing steel ring 3 for attaching an accessory such as a lens hood.
1群レンズ保持環11は、その内周に第ルンズ群Ll
を保持している。この1群保持環11のマウント部la
寄り外周部には、係合突起11aが設けられており、こ
の係合突起11aは、合焦調節環3の内周に刻設された
光軸方向に延在する溝3aに嵌合している。更に、係合
突起11aの内側には、ヘリコイド部11bが設けられ
ており、このヘリコイド部11bは、中間筒6の摺動部
6aとその内側に嵌合している1群摺動環7の光軸方向
被写体よりの一端部外周に設けられたヘリコイド部7a
と螺合している。従って、以上のへリコイド部3b及び
6b、係合突起11a及び溝3a、ヘリコイド部7a及
びllbとの螺合または係合によって、合焦調節環3の
回転を1群保持環11に伝える。上述の構成であるため
、変倍操作環2及び中間筒6が光軸方向に移動すると、
合焦操作環3も一体となって移動するが、1群保持環1
1は合焦調節環3の光軸方向の動きには拘束されないの
で、この先軸方向の動きは1群保持環11に伝達される
ことはない。The first group lens holding ring 11 has a first lens group Ll on its inner periphery.
is held. The mount portion la of this first group holding ring 11
An engaging protrusion 11a is provided on the outer peripheral portion of the focusing ring 3, and the engaging protrusion 11a fits into a groove 3a carved in the inner circumference of the focusing adjustment ring 3 and extending in the optical axis direction. There is. Further, a helicoid portion 11b is provided inside the engagement protrusion 11a, and this helicoid portion 11b connects the sliding portion 6a of the intermediate cylinder 6 and the first group sliding ring 7 fitted inside the sliding portion 6a. Helicoid part 7a provided on the outer periphery of one end closer to the object in the optical axis direction
It is screwed together. Therefore, the rotation of the focus adjustment ring 3 is transmitted to the first group holding ring 11 by the screwing or engagement with the helicoid parts 3b and 6b, the engagement protrusion 11a and the groove 3a, and the helicoid part 7a and llb. Because of the above configuration, when the variable power operation ring 2 and the intermediate tube 6 move in the optical axis direction,
The focusing operation ring 3 also moves together, but the 1st group holding ring 1
1 is not restrained by the movement of the focusing adjustment ring 3 in the optical axis direction, so this movement in the forward axis direction is not transmitted to the first group holding ring 11.
1群摺動環7は、1群レンズL1の倒れ防止に十分な長
さを持って中間筒6の内側に嵌合している。この摺動環
7には、半径方向外方に突出するズーム操作用のカムピ
ン13が植設されている。カムピン13は、中間筒6の
摺動部6aに設けられた逃げ溝6cを貫通して、固定筒
lに設けられた直進1i11cとカム環10に設けられ
たカム溝10bと係合することで回転不能状態にされて
いる。従って、カムピン13とカムfJ10bとによ−
〕て、カム環IQの回転運動を1群摺動環7の光軸方向
の直線運動に変換する機fffiを果たしている。The first group sliding ring 7 is fitted inside the intermediate tube 6 with a length sufficient to prevent the first group lens L1 from falling. A cam pin 13 for zoom operation that protrudes outward in the radial direction is implanted in the sliding ring 7. The cam pin 13 penetrates the escape groove 6c provided in the sliding portion 6a of the intermediate cylinder 6, and engages with the straight movement 1i11c provided in the fixed cylinder l and the cam groove 10b provided in the cam ring 10. It is unable to rotate. Therefore, the cam pin 13 and the cam fJ10b
] This functions to convert the rotational motion of the cam ring IQ into linear motion of the first group sliding ring 7 in the optical axis direction.
2及び4群保持環12は、中間筒6の内側に嵌合されて
おり、その内周部に第2レンズ群L2及び第4レンズ群
L4を保持している。The second and fourth group holding ring 12 is fitted inside the intermediate cylinder 6, and holds the second lens group L2 and the fourth lens group L4 on the inner peripheral portion thereof.
2及び4群保持環12の外周にはズーム用のカムピン9
が植設されており、このカムピン9は、中間筒6に設け
られた逃げ溝1dを貫通して、固定筒1に設けられた直
進溝1d及びカム環lOに設けられたカム溝10aに嵌
合している。従って、2及び4群保持環12は、直進溝
1dとカムピン9との係合によって回転不能の状態にさ
れていると共に、カムピン9とカム溝10aとの係合に
より、カム環lOの回転は2及び4群保持環の光軸方向
の直線移動に変換される。A zoom cam pin 9 is provided on the outer periphery of the second and fourth group holding ring 12.
The cam pin 9 passes through an escape groove 1d provided in the intermediate cylinder 6 and fits into a straight groove 1d provided in the fixed cylinder 1 and a cam groove 10a provided in the cam ring IO. It matches. Therefore, the second and fourth group holding rings 12 are rendered unrotatable by the engagement between the linear groove 1d and the cam pin 9, and the engagement between the cam pin 9 and the cam groove 10a prevents the rotation of the cam ring 10. This is converted into linear movement of the second and fourth group holding rings in the optical axis direction.
尚、カム環lOは、固定筒1に植設されたピン14がカ
ム環lOに設けられた円周溝10dに嵌入しているので
、光軸方向に移動することは制限されている。The cam ring lO is restricted from moving in the optical axis direction because the pin 14 implanted in the fixed cylinder 1 is fitted into the circumferential groove 10d provided in the cam ring lO.
また、固定筒lの内周であって、カム環10との間には
不図示のカメラ本体からの駆動力を伝達する駆動力伝達
機構(不図示)によって、光軸口りに回転のみするよう
に保持された回転伝達環4が設けられている。この回転
伝達環4にはキー溝4aが設けられており、このキー溝
4aに合焦調節環3にビス留めなどにより固定された伝
達キー5が嵌入されているので、回転伝達環4の回転は
合焦調節環3に伝えられる。この結果、合焦調節環3は
、中間筒6にヘリコイド部3b及び6bを介して回転可
能に保持されているので、回転する。Also, between the inner periphery of the fixed barrel l and the cam ring 10, there is a driving force transmission mechanism (not shown) that transmits the driving force from the camera body (not shown), so that the optical axis is only rotated. A rotation transmission ring 4 is provided which is held in this manner. This rotation transmission ring 4 is provided with a keyway 4a, and a transmission key 5 fixed to the focusing adjustment ring 3 with screws or the like is fitted into this keyway 4a, so that the rotation of the rotation transmission ring 4 can be rotated. is transmitted to the focusing adjustment ring 3. As a result, the focus adjustment ring 3 is rotatably held by the intermediate cylinder 6 via the helicoid parts 3b and 6b, and thus rotates.
(動作) 上述したズームレンズ鏡筒は、以下のように動作する。(motion) The zoom lens barrel described above operates as follows.
自動合焦操作時には、回転伝達環4の回転によって、上
述のように合焦調節環3が回転し、合焦調節環3の回転
は係合突起11a及び溝3aによって、1群保持環11
に伝達される。During automatic focusing operation, the rotation of the rotation transmission ring 4 causes the focus adjustment ring 3 to rotate as described above, and the rotation of the focus adjustment ring 3 is controlled by the first group holding ring 11 by the engagement protrusion 11a and the groove 3a.
transmitted to.
その結果、1群保持環11は、回転が規制されている1
群摺動環7にヘリコイドによって螺合しているので、所
定の合焦位置まで、回転しながら光軸方向に移動する。As a result, the rotation of the first group holding ring 11 is restricted.
Since it is screwed into the group sliding ring 7 by a helicoid, it moves in the optical axis direction while rotating to a predetermined focusing position.
また、手動合焦操作時には、合焦調節環3を保持して回
転させることにより行なう、その後、自動合焦時と同じ
ように1群保持環11は光軸方向に移動させられて合焦
動作が完了する。In addition, during manual focusing operation, the focusing adjustment ring 3 is held and rotated, and then, similarly to automatic focusing, the first group holding ring 11 is moved in the optical axis direction to perform the focusing operation. is completed.
ズーム、すなわち変倍操作は、変倍操作環2を保持して
光軸方向に移動させることにより行なう、変倍操作環2
は、中間筒6と共にカムピン8と直進溝1eとによって
回転が規制されているので、光軸方向に直進する。更に
、カムピン8が直進する時、このカムピン8とカム溝1
0cで係合しているカム環10は、ピン14と円周溝1
0dとによって光軸方向に移動を規制されているので、
回転のみを行なう、カム環10が回転すると、カムn
10 a及びfobに係合しているカムピン9及びカム
ビン13がそれぞれのカム溝によって規制された方向に
沿って移動し、1群及び2.4群の光学系を所定の焦点
距離に対応する位置まで移動させる。Zooming, that is, a variable magnification operation, is performed by holding the variable magnification operation ring 2 and moving it in the optical axis direction.
Since the rotation of the intermediate cylinder 6, the cam pin 8, and the straight groove 1e is restricted, it moves straight in the optical axis direction. Furthermore, when the cam pin 8 moves straight, the cam pin 8 and the cam groove 1
The cam ring 10 engaged at 0c is connected to the pin 14 and the circumferential groove 1.
Since movement in the optical axis direction is restricted by 0d,
When the cam ring 10 rotates, the cam n
The cam pin 9 and cam pin 13 engaged with 10 a and the fob move along the directions regulated by their respective cam grooves, and the optical systems of the 1st and 2.4th groups are moved to positions corresponding to predetermined focal lengths. move it to.
第2図は、カム環10の各カム溝の配置を示した展開図
である。第2図は、テレ(無限遠側)端にある状態を示
している。FIG. 2 is a developed view showing the arrangement of each cam groove of the cam ring 10. FIG. FIG. 2 shows the state at the tele (infinity side) end.
変倍操作環2を光軸方向に移動させてテレ状態からワイ
ド(至近側)状態にした時、変倍操作環2に植設された
カムビン8は、固定筒1に設けられたカム溝1eによっ
て回転を規制されているので、第2図の矢印B方向に直
進する。When the variable power operation ring 2 is moved in the optical axis direction from the telephoto state to the wide (close-up side) state, the cam pin 8 installed in the variable power operation ring 2 moves into the cam groove 1e provided in the fixed barrel 1. Since rotation is restricted by , it moves straight in the direction of arrow B in FIG.
この時、カムピン8はカム溝10cとも係合しているの
で、カムピン8の直進によって、カム環10は第2図に
おいて矢印A方向に回転する。既に説明したように、−
カム環10は、固定筒1に植設されたビン14によって
光軸方向の移動を制限されているので、光軸方向に移動
せず光軸周りに回転するだけ°である。At this time, since the cam pin 8 is also engaged with the cam groove 10c, the cam ring 10 rotates in the direction of arrow A in FIG. 2 as the cam pin 8 moves straight. As already explained, −
Since the movement of the cam ring 10 in the optical axis direction is restricted by the pin 14 installed in the fixed cylinder 1, the cam ring 10 does not move in the optical axis direction but only rotates around the optical axis.
1群摺動環7に植設されたビン13は、カム溝10bと
係合しているので、カム環10が矢印A方向へ回転する
と、固定筒1の直進溝lcに回転を規制され、最初は、
矢印C方向へと移動する。更にカム環10が回転してカ
ムピン13がカム溝10bのUターン部を通り過ぎると
、今度は矢印B方向へと移動する。この時、1群保持環
11及び1群レンズLl も1群摺動環7と一体となっ
て最初は、矢印C方向へ、次に矢印B方向へと移動する
。また、?及び4群保持環12に植設されたビン9は、
カム溝10aと係合しているので、カム環10の矢印A
方向への回転に伴って、固定筒1の直進溝ldに回転を
規制され、矢印C方向へ移動する。従って、この時に2
及び4群保持環12に保持されている第2及び4群のレ
ンズ群L2及びL4も一体となって矢印C方向に移動す
る。The pin 13 implanted in the first group sliding ring 7 is engaged with the cam groove 10b, so when the cam ring 10 rotates in the direction of arrow A, the rotation is restricted by the straight groove lc of the fixed cylinder 1. Initially,
Move in the direction of arrow C. When the cam ring 10 rotates further and the cam pin 13 passes the U-turn portion of the cam groove 10b, it moves in the direction of arrow B. At this time, the first group holding ring 11 and the first group lens Ll also move together with the first group sliding ring 7 first in the direction of arrow C and then in the direction of arrow B. Also,? And the bottle 9 installed in the fourth group holding ring 12 is
Since it is engaged with the cam groove 10a, the arrow A of the cam ring 10
Along with the rotation in the direction, the rotation is restricted by the straight groove ld of the fixed cylinder 1 and moves in the direction of the arrow C. Therefore, at this time 2
The second and fourth lens groups L2 and L4 held by the fourth group holding ring 12 also move together in the direction of arrow C.
第2及び第4レンズ群のこの移動によって、ワイド状態
が達成される。尚、第2図に示すように、カム溝を単一
のカム環10にすべて集めたのでカム溝相互の精度の確
保に好都合となつた。By this movement of the second and fourth lens groups, a wide-angle state is achieved. Incidentally, as shown in FIG. 2, all the cam grooves are gathered into a single cam ring 10, which is convenient for ensuring mutual accuracy of the cam grooves.
第3図は、第2図のカム溝fob及び
10cの中心線の形状に合わせて、テレ端Tを一致させ
て重ねて表わした図である。FIG. 3 is a diagram in which the telephoto ends T are aligned and overlapped in accordance with the shapes of the center lines of the cam grooves fob and 10c in FIG. 2.
第3図において、カム溝10bは、1群関連部材、すな
わち第1群レンズL+、1群保持環11及び1群摺動環
7の移動を、またカム溝10cは変倍関連部材、すなわ
ち変倍操作環2及び中間筒6の移動を表わしている。こ
の第3図において、テレ端Tからワイド端Wに移動する
際には、1群関連部材及び変倍関連部材の相対的位置関
係は、図から分かるように区間りにおいては、変倍操作
関連部材が1群関連部材よりも速く移動し、だんだん加
速してゆき、両者の移動量差が最大量文■になった後、
区間Eに移行して減速が始まり、区間Eの終りでは、両
者の移動量差はOになり、相対的位置関係はテレ端と同
じ状態に戻る。その後、区間Fに移行すると、逆に1群
関連部材の移動が速くなり、加速しながら、ワイド端W
まで移動量差は増加する0以上のように、変倍操作関連
部材と1群関連部材との間隔は最大でllだけ減少する
ので1両者の間隔は最低でもこの差lr以上確保してお
かなければならない、この量が、第1図に示す係合突起
11aの端面と合焦調節環3のへリコイド部3bの端面
との間の間隔it及び1群摺動環7の端面と中間筒6の
端面との間の距離文?である。従って、ll>文■及び
Hz>lr となるように設定されている。In FIG. 3, the cam groove 10b controls the movement of the first group related members, that is, the first group lens L+, the first group holding ring 11, and the first group sliding ring 7, and the cam groove 10c controls the movement of the first group related members, that is, the first group holding ring 11 and the first group sliding ring 7. It shows the movement of the double operating ring 2 and the intermediate cylinder 6. In FIG. 3, when moving from the telephoto end T to the wide end W, the relative positional relationship of the first group related members and the zooming related members is as shown in the figure. After the member moves faster than the related member of the first group and gradually accelerates, and the difference in the amount of movement between the two reaches the maximum amount ■,
Deceleration begins in section E, and at the end of section E, the difference in the amount of movement between the two becomes O, and the relative positional relationship returns to the same state as at the telephoto end. After that, when moving to section F, the movement of the first group related members becomes faster, and while accelerating, the wide end W
As shown in the figure above, the distance between the magnification change operation related members and the 1st group related members will decrease by ll at the maximum, so the distance between them must be at least equal to or greater than this difference lr. This amount must be the distance it between the end surface of the engaging protrusion 11a and the end surface of the helicoid portion 3b of the focusing adjustment ring 3 and the end surface of the first group sliding ring 7 and the intermediate cylinder 6 shown in FIG. Distance statement between the end face of ? It is. Therefore, it is set so that ll>sentence 2 and Hz>lr.
第4a図は、バヨネット部3Cにレンズフード15の取
付部15bを取り付けた状態で示す合焦m節理3に第1
図のレンズ鏡筒の先端部の部分断面図であり、第4a図
において、自動合焦操作を行なう場合は、変倍操作環2
及び中間筒6とへリコイド結合によって一体となってい
る合焦調節環3を保持して行なう、これは、合焦tJR
節環節理保持していれば、公知の一操作変倍機構と同様
に変倍操作と合焦操作とを一操作にて行なうことができ
るからである。この時の操作する指の位置Fが第4a図
中では楕円で示しであるが、図面から明らかなように、
バヨネット部3cが合焦調節環3の前端に設けられてい
るため、この合焦調節環3を保持した場合、指が位置F
においてレンズフード15の傾斜部15aに当たるので
、結局指Fは、合焦調\
節理3の外周の一部とこの傾斜部15aとの両者を保持
する形になり、合焦操作及び変倍操作の何れにおいても
確実に保持でき、操作性が向上する。FIG. 4a shows a state in which the attachment part 15b of the lens hood 15 is attached to the bayonet part 3C.
4a is a partial cross-sectional view of the tip of the lens barrel shown in the figure, and when performing an automatic focusing operation in FIG.
This is done by holding the focusing adjustment ring 3 which is integrated with the intermediate cylinder 6 by a helicoidal connection.
This is because if the ring joint is maintained, the zooming operation and focusing operation can be performed in one operation, similar to the known one-operation zooming mechanism. The position F of the operating finger at this time is indicated by an ellipse in Fig. 4a, but as is clear from the drawing,
Since the bayonet portion 3c is provided at the front end of the focusing adjustment ring 3, when the focusing adjustment ring 3 is held, the finger is placed at the position F.
, the finger F hits the inclined part 15a of the lens hood 15, so the finger F ends up holding both a part of the outer periphery of the focusing joint 3 and this inclined part 15a, and is used for focusing operations and zooming operations. In either case, it can be held securely and operability is improved.
これに対して従来は、既に説明したように、例えば第5
図に示すレンズ鏡筒の部分断面図である第4b図に示す
ように、合焦操作時に移動する1群レンズ保持環61の
外周部にバヨネット部61cが設けられているので、こ
こにレンズフード65の取付部Q5bを取り付けた場合
、変倍操作時に間隔文4が減少する際に、レンズフード
61と合焦調節環53とを指で同時に押え込んでいると
、この間隔り4が保持されてしまい、変倍操作ができな
くなってしまう。On the other hand, conventionally, as already explained, for example, the fifth
As shown in FIG. 4b, which is a partial cross-sectional view of the lens barrel shown in the figure, a bayonet portion 61c is provided on the outer periphery of the first group lens holding ring 61 that moves during a focusing operation, so a lens hood is provided here. When the mounting part Q5b of 65 is attached, when the distance 4 decreases during the zooming operation, if the lens hood 61 and the focusing adjustment ring 53 are simultaneously pressed down with fingers, this distance 4 will be maintained. This will make it impossible to change the magnification.
つまり、指が位置Gにあれば問題ないが、位置G′にあ
る時には、指が邪魔となり変倍操作に支障を来すのであ
る。また、この場合、間隔交4に指が挟まれて合焦操作
そのものもやりずらいことがあった。しかしながら、上
述のような本発明の一実施例によれば、これらの問題点
は解消する。In other words, there is no problem if the finger is at position G, but when it is at position G', the finger gets in the way and interferes with the zooming operation. Further, in this case, the finger may be caught in the interval cross section 4, making it difficult to perform the focusing operation itself. However, according to an embodiment of the present invention as described above, these problems are solved.
(発明の効果)
以上説明した本発明のズームレンズ鏡筒によれば、以下
のような効果が得られる。(Effects of the Invention) According to the zoom lens barrel of the present invention described above, the following effects can be obtained.
変倍操作をする変倍操作環と一体的な中間筒を固定筒の
内側に嵌合長を十分長くとって嵌合させたので、変倍操
作時のガタッキがなくなる。Since the intermediate cylinder, which is integrated with the variable power operation ring that performs the variable power operation, is fitted inside the fixed cylinder with a sufficiently long fitting length, there is no wobbling during the variable power operation.
また、中間筒の内側に摺動環及び保持環を嵌合させたの
で、光学系の倒れが小さくなり、光学性箋が確保される
。Further, since the sliding ring and the holding ring are fitted inside the intermediate cylinder, the tilting of the optical system is reduced, and the optical property is secured.
更に、中間筒を固定筒の内側に嵌合させたので、中間筒
の形状が簡単になり、加工が容易となる。Furthermore, since the intermediate cylinder is fitted inside the fixed cylinder, the shape of the intermediate cylinder is simple and processing becomes easy.
フード取付部を合焦調節環に設けたので、合焦操作時及
び変倍操作時において、操作性が向上した。Since the hood attachment part is provided on the focus adjustment ring, operability is improved during focusing operations and zooming operations.
第1図は、本発明の一実施例を示すズームレンズ鏡筒の
縦断面図てあり、
第2図は、第1図におけるカム環のテレ状態において示
す展開図であり、
第3図は、第2図に示した2つのカム溝の相対的位置関
係を示す図であり、
第4a図は、第1図に示す実施例にレンズフードを取り
付けた状態を示す部分断面図であり、
第4b図は、第5図に示す従来例のズームレンズ鏡筒に
レンズフードを装着した状態を示す部分断面図であり。
第5図は、従来例のズームレンズ鏡筒を示す縦断面図で
ある。
[主要部分の符号の説明]
l・・・ ・・・ ・・・固定筒
2・・・ ・−・ ・・・変倍操作環
6・・・ ・・・ ・・・中間筒
7・・・ ・・・ ・・・1群摺動環
12 ・・・ ・・・保持環
情 2)vl
D E Ft 3口
情4a口
″64b江FIG. 1 is a longitudinal sectional view of a zoom lens barrel showing an embodiment of the present invention, FIG. 2 is a developed view of the cam ring in FIG. 1 in the telephoto state, and FIG. 4b is a diagram showing the relative positional relationship between the two cam grooves shown in FIG. 2; FIG. 4a is a partial cross-sectional view showing the embodiment shown in FIG. 1 with a lens hood attached; FIG. This figure is a partial sectional view showing a state in which a lens hood is attached to the conventional zoom lens barrel shown in FIG. FIG. 5 is a longitudinal sectional view showing a conventional zoom lens barrel. [Explanation of symbols of main parts] l... ...Fixed tube 2... ...Magnifying operation ring 6... ...Intermediate tube 7... ... 1 group sliding ring 12 ... ... holding ring 2) vl D E Ft 3 mouth 4a mouth'' 64b
Claims (1)
よび合焦光学系を有すると共に、変倍操作時に光軸方向
に直進して該変倍光 学系を光軸方向に移動させるための外部 操作部材を備えたズームレンズ鏡筒におい て、 固定筒と、 該変倍光学系を保持する保持環と、 該保持環に作動連結されていると共に該外 部操作部材と一体的に光軸方向に直進する中間筒と、 該外部操作部材と連動すると共に該合焦光 学系を移動させるための摺動環とから成り、該中間筒は
該固定筒に嵌合長を長くとって その内側に嵌合されており、該中間筒の内側には更に該
摺動環および該保持環が嵌合されていることを特徴とす
るズームレンズ鏡筒。 2、前記摺動環には、合焦操作をする外部操作可能な合
焦操作環が作動連結されており、該合焦操作環にはレン
ズフードを取付けるための取付部が設けられていること
を特徴とする請求項1に記載のズームレンズ鏡筒。[Scope of Claims] 1. It has a variable power optical system and a focusing optical system that move together in the optical axis direction during a variable power operation, and moves straight in the optical axis direction during a variable power operation to move the variable power optical system to the optical axis. A zoom lens barrel equipped with an external operating member for moving in the axial direction, comprising: a fixed barrel, a retaining ring that holds the variable magnification optical system, and a retaining ring operably connected to the retaining ring and the external operating member. It consists of an intermediate cylinder that integrally moves straight in the optical axis direction, and a sliding ring that moves in conjunction with the external operating member and moves the focusing optical system, and the intermediate cylinder has a fitting length with the fixed cylinder. A zoom lens barrel characterized in that the intermediate barrel is long and fitted inside the barrel, and the sliding ring and the holding ring are further fitted inside the intermediate barrel. 2. A focusing operation ring that can be externally operated for performing a focusing operation is operatively connected to the sliding ring, and the focusing operation ring is provided with a mounting portion for attaching a lens hood. The zoom lens barrel according to claim 1, characterized in that:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63044546A JPH01219810A (en) | 1988-02-29 | 1988-02-29 | Zoom lens barrel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63044546A JPH01219810A (en) | 1988-02-29 | 1988-02-29 | Zoom lens barrel |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH01219810A true JPH01219810A (en) | 1989-09-01 |
Family
ID=12694498
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63044546A Pending JPH01219810A (en) | 1988-02-29 | 1988-02-29 | Zoom lens barrel |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH01219810A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002016994A1 (en) * | 2000-08-18 | 2002-02-28 | Seiko Epson Corporation | Zoom lens device, optical device comprising the same, and projector |
JP2005017981A (en) * | 2003-06-30 | 2005-01-20 | Canon Inc | Camera |
JP2008026892A (en) * | 2006-06-23 | 2008-02-07 | Pentax Corp | Lens position adjusting device |
CN109313321A (en) * | 2016-06-10 | 2019-02-05 | 株式会社尼康 | Lens barrel and photographic device |
-
1988
- 1988-02-29 JP JP63044546A patent/JPH01219810A/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002016994A1 (en) * | 2000-08-18 | 2002-02-28 | Seiko Epson Corporation | Zoom lens device, optical device comprising the same, and projector |
US6894845B2 (en) | 2000-08-18 | 2005-05-17 | Seiko Epson Corporation | System and methods for providing a zoom lens device |
JP2005017981A (en) * | 2003-06-30 | 2005-01-20 | Canon Inc | Camera |
JP2008026892A (en) * | 2006-06-23 | 2008-02-07 | Pentax Corp | Lens position adjusting device |
CN109313321A (en) * | 2016-06-10 | 2019-02-05 | 株式会社尼康 | Lens barrel and photographic device |
CN109313321B (en) * | 2016-06-10 | 2022-08-02 | 株式会社尼康 | Lens barrel and image pickup apparatus |
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