JPH0248616A - Lens device - Google Patents
Lens deviceInfo
- Publication number
- JPH0248616A JPH0248616A JP20072188A JP20072188A JPH0248616A JP H0248616 A JPH0248616 A JP H0248616A JP 20072188 A JP20072188 A JP 20072188A JP 20072188 A JP20072188 A JP 20072188A JP H0248616 A JPH0248616 A JP H0248616A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- cam
- interlocking
- group
- barrel
- 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 description 27
- 230000008602 contraction Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000007246 mechanism Effects 0.000 abstract description 15
- 210000000078 claw Anatomy 0.000 abstract description 12
- 238000003384 imaging method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 235000007173 Abies balsamea Nutrition 0.000 description 1
- 241000270295 Serpentes Species 0.000 description 1
- 241000218685 Tsuga Species 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 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)
本発明はカメラにより、撮影被写体を近接撮影もしくは
拡大撮影するレンズ装置(接写撮影装置)に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a lens device (close-up photographing device) that uses a camera to take close-up or enlarged photographs of a subject.
(従来の技術)
従来より、撮影倍率が0.2倍を越え10倍程度までの
いわゆる接写撮影を行なう場合には、カメラと撮影レン
ズ(レンズ鏡筒)の間隔を広げる為の中間装置が用いら
れている。その中間装置としては一般的には、カメラ取
付部と撮影レンズ取付部の間を遮光性の蛇腹により伸縮
自在に連結した蛇腹型繰出し装置、もしくはカメラと撮
影レンズ間に介在させるいわゆる中間チューブが多用さ
れている。撮影倍率は撮影レンズの緑出し量により決定
されるので、前者の蛇腹型の場合は蛇腹の伸縮量を調整
することにより、後者のチューブの場合にはチューブ長
を変更することで、所望の撮影倍率を得て、撮影が行な
われている。(Prior art) Conventionally, when performing so-called close-up photography with a magnification of more than 0.2x and up to about 10x, an intermediate device has been used to widen the distance between the camera and the photographic lens (lens barrel). It is being Generally, the intermediate device used is a bellows-type feeding device that telescopically connects the camera mounting part and the photographic lens mounting part with a light-shielding bellows, or a so-called intermediate tube that is interposed between the camera and the photographic lens. has been done. The shooting magnification is determined by the amount of green exposure of the shooting lens, so in the case of the former bellows type, by adjusting the amount of expansion and contraction of the bellows, and in the case of the latter tube, by changing the tube length, the desired shooting can be achieved. Photography is being carried out after obtaining magnification.
第4図(a) (b) (c)は撮影レンズの
繰出し量dと撮影倍率βとの相関モデル図である。FIGS. 4(a), 4(b), and 4(c) are diagrams showing a correlation model between the extension amount d of the photographing lens and the photographing magnification β.
しは焦点比llfのl影しンズ、Fは結像面としてのフ
ィルム面、Y、は被写体、Yは結像像、aは被写体圧l
1l(撮影レンズ上4−4被写体Y0間距fi)、bは
保距m<撮影レンズL−結像面F開路m>、ttは撮影
距離(被写体Y。4−4結像面F間距離)である。is the l shadow of the focal ratio llf, F is the film plane as the imaging plane, Y is the subject, Y is the image formed, a is the subject pressure l
1l (distance fi between 4-4 subject Y0 on the photographic lens), b is distance maintenance m<photographing lens L-imaging plane F open circuit m>, tt is photographing distance (subject Y; distance between 4-4 imaging plane F) It is.
(a)図は撮影レンズLの繰出し量d=0、即ちレンズ
Lの焦点が結像面Fに位置していて撮影倍率β=110
0の場合を示している。(b)図と(C)図は夫々レン
ズLを繰出した状態を示してあり、(b)図は撮影倍率
βはぼ1倍、(C)図は2倍の作図としている。(a) In the figure, the amount of extension of the photographing lens L is d = 0, that is, the focus of the lens L is located on the imaging plane F, and the photographing magnification β = 110.
The case of 0 is shown. Figures (b) and (C) each show the state in which the lens L is extended, and the photographing magnification β in figure (b) is approximately 1x, and in figure (C) it is 2x.
而して撮影倍率β、撮影距離2、被写体距離aは夫々下
記の関係式で表わされる。The photographing magnification β, the photographing distance 2, and the subject distance a are each expressed by the following relational expressions.
β=Y/Y0=b/a=d/f・・・(1)It=f
(1+β)2/β ・・・・・(2)第1図グラフは上
記(2)式を、撮影距@iを一定値として解いたもので
あり、レンズ繰出し量d(撮影倍率110o時に対する
、撮影レンズ0フイルム(焦点面)間距離の増加分)の
増加に連動して撮影レンズの焦点距離fを増加→減少す
る様に変更させると、撮影距@ILを変更せずに撮影倍
率βを単調増加させることが出来る。β=Y/Y0=b/a=d/f...(1) It=f
(1 + β) 2/β ... (2) The graph in Figure 1 is a solution of the above equation (2) with the shooting distance @i as a constant value, and the lens extension amount d (for the shooting magnification of 110o) If the focal length f of the photographing lens is changed from increasing to decreasing in conjunction with the increase in the distance between the photographing lens and the film (focal plane), the photographing magnification β will be increased without changing the photographing distance @IL. can be monotonically increased.
上記光学式(2)は結像式であるので、繰出しlidの
変更によって撮影ピントがズレることもない。Since the above-mentioned optical type (2) is an image forming type, the photographing focus will not shift due to a change in the feeding lid.
第2図は撮影レンズとしての焦点距離可変撮影レンズの
一例の光学系モデル図であり、L1L2 ・L3 ・L
4はそれぞれ一枚または複数枚のレンズによって構成さ
れるレンズ群であり、Dは絞りである。第ルンズ群り、
・第2レンズ群L2・第3レンズ群L3・第4レン
ズ群L4及び絞りDがそれぞれ移動することによって焦
点距離変更、つまり変倍が行なわれる。Fig. 2 is an optical system model diagram of an example of a variable focal length photographic lens as a photographic lens, and L1L2 ・L3 ・L
4 is a lens group each composed of one or more lenses, and D is an aperture. The first Luns group,
- By moving the second lens group L2, the third lens group L3, the fourth lens group L4, and the diaphragm D, the focal length is changed, that is, the magnification is changed.
第2図の(a)・(b) (c)の各レンズ位置状
態は夫々第1図(1)グラフ上の焦点距離f1 ・f2
・f3のときの位置状態を示している。(a)と(c
)は光学的に共役な配置となっており、f、=f3.1
/β、=β3の関係で、またβ2=x1である。つまり
第2レンズ群L2 ・第3レンズ群L3及び絞りDは一
体的に直線的に移動する。第ルンズ群L1及び第4レン
ズ群L4は第2レンズ群L2 ・第3レンズ群L3及び
絞りDに対して全く対称的な動きを行ない倍率等倍状態
(b)でそれぞれのレンズ間隔が一番近くなる。さらに
第ルンズ群及び第4レンズ群の第2レンズ群L2 ・第
3レンズ群し3及び絞りDに対する相対的な光軸上の動
きは撮影倍率β。The lens position states of (a), (b), and (c) in Figure 2 are the focal lengths f1 and f2 on the graph in Figure 1 (1), respectively.
- Shows the position state at f3. (a) and (c
) has an optically conjugate arrangement, f, = f3.1
/β,=β3, and β2=x1. In other words, the second lens group L2, the third lens group L3, and the diaphragm D move integrally and linearly. The lens group L1 and the fourth lens group L4 move completely symmetrically with respect to the second lens group L2, the third lens group L3, and the diaphragm D, so that the distance between each lens is the best in the same magnification state (b). It gets closer. Further, the movement of the second lens group and the fourth lens group relative to the second lens group L2, the third lens group 3, and the aperture D on the optical axis corresponds to the photographing magnification β.
からβ2 (等倍)までの動きと、β3からβ2(等倍
)までの動きが等しくなるように構成されている。つま
り第2レンズ群し2 ・第3レンズ群り、・絞りDに対
する第ルンズ群り3、及び第4レンズ群L4の各倍率に
右ける位置は第3図に示すようになる。また各倍率及び
その間の任意の撮影倍率時において、被写体と予定結像
面の距離は常に一定で一度ピントを合わせれば、倍率を
変えても再度ピント合わせをする必要はない。The structure is such that the movement from β3 to β2 (equal magnification) is equal to the movement from β3 to β2 (equal magnification). In other words, the positions of the second lens group 2, the third lens group, the lens group 3 and the fourth lens group L4 relative to the aperture D are as shown in FIG. Furthermore, at each magnification and at any imaging magnification between them, the distance between the subject and the intended imaging plane is always constant, and once focused, there is no need to focus again even if the magnification is changed.
接写撮影において上述第2図・第3図のような光学系の
動きを行なわせるため第2レンズ群L2、第3レンズ群
L3.及び絞りDの動きはベローズ(中間装置)で行な
い、第ルンズ群Ll、及び第4レンズ群L4の動きはベ
ローズの可動側に固定したカム機構を作動させて行なわ
せるものでありベローズの動きとカム機構による動きの
合成で第2図に示すような第ルンズ群LI、及び第4レ
ンズ群L4の動きを実現する。In order to make the optical system move as shown in FIGS. 2 and 3 in close-up photography, the second lens group L2, the third lens group L3 . The movements of the diaphragm D and the diaphragm D are performed by a bellows (intermediate device), and the movements of the lens group Ll and the fourth lens group L4 are performed by operating a cam mechanism fixed to the movable side of the bellows. By combining the movements of the cam mechanism, the movements of the lens group LI and the fourth lens group L4 as shown in FIG. 2 are realized.
この際の一般的なカム機構の展開図を第14図に示す。A developed view of a general cam mechanism at this time is shown in FIG.
201は不動の固定部であり、光軸0−0に沿う方向の
直進:$201aを有している。Reference numeral 201 denotes an immovable fixed portion, which moves straight in the direction along the optical axis 0-0: $201a.
202はカム筒で固定部201に対して回転方向のみ自
在に支持されている。カム筒202にはカム筒202a
が形成されている。203は移動レンズ群鏡筒のビンで
あり、このビン203の動きは移動レンズ群鏡筒に保持
された変倍用レンズ群(LlやL4)と同一である。前
記ビン203は前記固定部201の直進溝201aを貫
通し、前記カム筒202のカムf14202 aに嵌入
している。この状態でカム筒202を矢印B方向に回転
させるとビン203は矢印C方向に移動した後、矢印E
方向に移動する。よって変倍用レンズ群もビン203と
同様の移動を行なう。Reference numeral 202 is a cam cylinder which is freely supported with respect to the fixed part 201 only in the rotational direction. The cam cylinder 202 has a cam cylinder 202a.
is formed. Reference numeral 203 denotes a bin of the movable lens group barrel, and the movement of this bin 203 is the same as that of the variable power lens groups (Ll and L4) held in the movable lens group barrel. The bin 203 passes through the straight groove 201a of the fixed part 201 and is fitted into the cam f14202a of the cam cylinder 202. When the cam cylinder 202 is rotated in the direction of arrow B in this state, the bin 203 moves in the direction of arrow C, and then moves in the direction of arrow E.
move in the direction. Therefore, the zoom lens group also moves in the same way as the bin 203.
以上述べた様なカム機構によって第3図に示すような、
第ルンズ群し1.第4レンズ群L4の動きが実現される
。As shown in Fig. 3, the cam mechanism as described above is used.
The first run group 1. Movement of the fourth lens group L4 is realized.
(発明が解決しようとする問題点)
しかしながら上記第14図例のようなカム機構構成では
、ビン203の動きを滑らかに動かすためにはカムの接
線方向と直進1201aのなす角度θを大きくする必要
があり、カム溝202 aの周方向の長さしが大きくな
るという傾向がある。(Problem to be Solved by the Invention) However, in the cam mechanism configuration as shown in the example in FIG. There is a tendency that the length of the cam groove 202a in the circumferential direction increases.
−数的にこれらのカム機構は複数配置する必要があり、
Lを大きくすることはスペース的に問題がある。またカ
ム溝の周方向の長さしを小さくするとカムの接線方向と
直進溝のなす角度θが小さくなり、ビンの動きが悪くな
り、さらにはビンの位置精度が悪くなり、移動レンズ群
の位置精度も悪くなるため、光学性能が劣化するという
問題点が生じる。- Numerically, it is necessary to arrange multiple cam mechanisms,
Increasing L causes problems in terms of space. Furthermore, if the length of the cam groove in the circumferential direction is made smaller, the angle θ between the tangential direction of the cam and the linear groove becomes smaller, which impairs the movement of the bottle, furthermore, the positioning accuracy of the bottle becomes worse, and the position of the movable lens group Since the accuracy also deteriorates, a problem arises in that optical performance deteriorates.
本発明は同じくカム機構て変倍レンズ群の移動を行なわ
せるものであるが、上記のような問題点を解消したこの
種の接写撮影用レンズ鏡筒を提供することを目的とする
。The present invention also uses a cam mechanism to move a variable magnification lens group, and an object of the present invention is to provide a lens barrel for close-up photography of this type that solves the above-mentioned problems.
(問題点を解決するための手段)
本発明は、
焦点距離可変撮影レンズと、カメラと、該両者を一方側
と他方側とに装着支持させる伸縮式の中間装置とからな
るレンズ装置であり、
前記撮影レンズは光軸方向に移動する2群以上の変倍用
レンズ群を有し、該撮影レンズを装着支持させた中間装
置の伸縮量に連動して前記変倍用レンズ群をカム上で第
1の位置と第2の位置の間を移動させるカム手段を有し
、
前記中間装置の一方向の伸縮操作の間に変倍レンズ群を
カム手段のカムで第1の位置から第2の位置へ移動させ
た後に、該第2の位置から該第1の位置の方向へ該カム
の軌跡上をもどす伝達手段を有する、ことを特徴とする
レンズ装置である。(Means for Solving the Problems) The present invention is a lens device comprising a variable focal length photographing lens, a camera, and a telescoping intermediate device for mounting and supporting both on one side and the other side, The photographing lens has two or more variable power lens groups that move in the optical axis direction, and the variable power lens group is moved on a cam in conjunction with the amount of expansion and contraction of an intermediate device on which the photographic lens is mounted and supported. cam means for moving between a first position and a second position, the variable power lens group being moved from the first position to the second position by the cam of the cam means during the one-way expansion and contraction operation of the intermediate device; A lens device characterized in that it has a transmission means for returning the trajectory of the cam from the second position to the first position after the cam is moved to the first position.
(作用)
即ち本発明のレンズ装置は中間装置(ベローズ)に撮影
レンズの変倍レンズ群を移動させるためのカム手段のカ
ム溝に対するビンの移動を往復させるための伝達機構を
設けたことにより、レンズのカム筒へのカム溝の配置が
容易になり、カム溝の接線と直進溝のなす角度が比較的
大きくとれるために、ビンの動きが滑らかで、位置精度
が良好なレンズを実現できるという効果がある。(Function) That is, in the lens device of the present invention, the intermediate device (bellows) is provided with a transmission mechanism for reciprocating the movement of the bin with respect to the cam groove of the cam means for moving the variable magnification lens group of the photographing lens. The cam groove can be easily placed on the cam barrel of the lens, and the angle between the tangential line of the cam groove and the linear groove can be made relatively large, making it possible to create a lens with smooth movement of the bottle and good positioning accuracy. effective.
(実施例)
第5図は本発明に従うレンズ鏡筒を装着した接写撮影装
置の縦断側面図であり、Aはレンズ鏡筒としての焦点距
離可変撮影レンズ(以下、撮影レンズと略記する)の総
括符号、Bは中間装置(ベローズ)の総括符号、Cはカ
メラである。カメラCについては輪郭を2点鎖線で示し
詳細構造は省略した。(Example) Fig. 5 is a longitudinal sectional side view of a close-up photographing device equipped with a lens barrel according to the present invention, and A is a general view of a variable focal length photographing lens (hereinafter abbreviated as photographing lens) as a lens barrel. The symbol B is a general symbol of the intermediate device (bellows), and C is the camera. Regarding camera C, its outline is indicated by a two-dot chain line and the detailed structure is omitted.
■、撮影レしズAの構成
第5図の縦断側面図、第6図の要部の展開平面図、第7
図の平面図、第8図の側面図において、1は外装環、2
はこの外装環内に環状隙間を存して同心に嵌入して外装
環と一体にねし止め結合した案内筒、3はこの案内筒に
同心に内嵌した前群カム筒であり、案内筒の内側におい
て光軸まわりに正逆回転自在である。4は前記案内筒2
の後端に該案内筒と同心に一体にねじ止め結合し、外装
環lの後端から後方へ突出させて設けた固定鏡筒、5は
この固定鏡筒に同心に外嵌した後群カム筒であり、固定
鏡筒の外側において光軸まわりに正逆回転自在である。■, Configuration of shooting lens A, vertical sectional side view in Figure 5, developed plan view of main parts in Figure 6, Figure 7
In the plan view shown in the figure and the side view shown in Fig. 8, 1 is an exterior ring;
3 is a guide cylinder which is fitted concentrically into this exterior ring with an annular gap and is integrally screwed together with the exterior ring; 3 is a front group cam cylinder which is fitted concentrically into this guide cylinder; It can be freely rotated forward and backward around the optical axis inside. 4 is the guide tube 2
A fixed lens barrel is integrally screwed concentrically with the guide barrel at the rear end and protrudes rearward from the rear end of the exterior ring l; 5 is a rear group cam that is externally fitted concentrically to the fixed lens barrel; It is a cylinder that can freely rotate forward and backward around the optical axis on the outside of the fixed lens barrel.
6は外装環1の後端位置において、固定鏡筒4の先端フ
ランジ部に対して体に取付は固定した、後述する中間装
置Bに対する装着用の環状マウントである。従って外装
環1・案内筒2・固定鏡筒4・マウント6の4部材は互
に一体物である。Reference numeral 6 denotes an annular mount fixed to the body at the rear end position of the exterior ring 1 with respect to the distal end flange portion of the fixed lens barrel 4, and for attachment to an intermediate device B, which will be described later. Therefore, the four members, the outer ring 1, the guide tube 2, the fixed lens barrel 4, and the mount 6, are integral with each other.
7は第ルンズ群L1を保持させた第ルンズ群鏡筒であり
、前群カム筒3の先端部側において該カム筒と同心に内
嵌している。8は第2レンズ群L2を保持させた第2レ
ンズ群鏡筒であり、固定鏡筒4の先端に一体に取付は支
持され、前群カム筒3の後端部側において該カム筒3内
に該カム筒と同心に突入して位置している。Reference numeral 7 denotes a lens barrel holding the lens group L1, which is fitted inside the front group cam barrel 3 at the tip end side thereof and concentrically with the cam barrel. Reference numeral 8 denotes a second lens group barrel holding the second lens group L2, which is integrally mounted and supported at the tip of the fixed lens barrel 4, and is mounted inside the cam barrel 3 on the rear end side of the front group cam barrel 3. It is located concentrically with the cam cylinder.
9は前記固定鏡筒4の先端側において該固定鏡筒内に該
鏡筒と同心に該鏡筒と一体に成形具備させた第3レンズ
群鏡筒であり、第3レンズ群L3を保持している。10
は固定鏡筒4の後端側に内嵌した第4レンズ群鏡筒であ
り、第4レンズ群L4を保持している。11は前記第2
及び第3レンズ群鏡筒8・9との開位置に右いて固定鏡
筒4側に一体に取付は支持させて配置した絞りユニット
であり、ステッピングモータllaを含み、該モータl
laにより絞りDの駆動がなされる。Reference numeral 9 denotes a third lens group barrel that is integrally molded within the fixed lens barrel on the distal end side of the fixed lens barrel 4, concentrically with the lens barrel, and holds the third lens group L3. ing. 10
A fourth lens group lens barrel is fitted inside the rear end side of the fixed lens barrel 4, and holds the fourth lens group L4. 11 is the second
and an aperture unit that is integrally mounted and supported on the fixed lens barrel 4 side at the open position with the third lens group barrels 8 and 9, and includes a stepping motor lla;
The aperture D is driven by la.
案内筒2の筒面には、第6図の要部の展開平面図に示し
たように、筒周の略180°対向2ケ所位置に光軸に並
行(筒面母線方向)な2条の直進溝孔12・12と、そ
れとは直交する方向である筒周方向の第1と第2の並行
2条の周溝孔13・14を具備させである。又該案内筒
2に内嵌の前群カム筒3の筒面には、筒周の略180°
対向2ケ所位置にへりカルカム溝孔15・15を具備さ
せである。そして該前群カム筒3に内嵌の第ルンズ群鏡
筒7に筒周の略180°対向2ケ所位置にビン軸16・
16を植設し、それ等のビン軸を夫々前記前群カム筒3
のへりカルカム溝孔15と直配案内筒2の直進溝孔12
の両者の交叉部に貫通係合させである。従って第ルンズ
群鏡筒7即ち第ルンズ群L1は、案内筒2に対して前群
カム筒3が光軸まわりに正逆回転されることにより前群
カム筒3内において光軸方向に前進・後進移動する。1
7は外装環1の先端部と第ルンズ群鏡筒7との間に張設
した前群付勢ばねてあり、第ルンズ群鏡筒7を前群カム
筒3内を前進する方向に常時引張り付勢している。The cylindrical surface of the guide tube 2 has two stripes parallel to the optical axis (in the direction of the generatrix of the cylindrical surface) at two positions facing each other at approximately 180 degrees around the periphery of the cylinder, as shown in the developed plan view of the main part in Fig. 6. It is provided with rectilinear grooves 12 and 12, and first and second two parallel circumferential grooves 13 and 14 in the circumferential direction of the cylinder, which is a direction perpendicular to the straight grooves. Further, the cylindrical surface of the front group cam cylinder 3 fitted inside the guide cylinder 2 has a diameter of about 180° around the cylindrical circumference.
Edge calcam grooves 15 are provided at two opposing positions. The lens barrel 7 of the lens group fitted inside the front group cam barrel 3 is provided with a pin shaft 16 at two positions approximately 180° opposite to each other around the barrel circumference.
16, and their respective bottle shafts are connected to the front group cam cylinder 3.
Edge Calcam slot 15 and straight slot 12 of direct guide tube 2
The intersecting portions of both are penetrated and engaged. Therefore, the lens group lens barrel 7, that is, the lens group L1 moves forward in the optical axis direction within the front group cam tube 3 by rotating the front group cam tube 3 forward and backward around the optical axis with respect to the guide tube 2. Move backwards. 1
Reference numeral 7 denotes a front group biasing spring stretched between the tip of the exterior ring 1 and the lens group barrel 7, which constantly pulls the lens barrel 7 in the front group cam barrel 3 in the forward direction. It is energizing.
18は前群カム筒3の外面に一体に具備させた突起部材
であり、その先端部は前記案内筒2の91の周溝孔13
を貫通させて案内筒2の外面側に突出させである。19
は案内筒2の外面に植設したビンであり、このビン19
と前記突起部材1Bとの間にカム筒駆動ばね20を張設
しである。このカム筒駆動ばね20は撮影レンズAを正
面(第ルンズ群り、側)からみて、前群カム筒3を案内
筒2内で光軸まわりに時計方向(正転方向)に常時回動
付勢している。Reference numeral 18 denotes a protruding member integrally provided on the outer surface of the front group cam cylinder 3, the tip of which is connected to the circumferential groove hole 13 of the guide cylinder 2 at 91.
is made to penetrate and protrude to the outer surface side of the guide tube 2. 19
is a bottle installed on the outer surface of the guide tube 2, and this bottle 19
A cam cylinder drive spring 20 is stretched between the protrusion member 1B and the protrusion member 1B. This cam barrel drive spring 20 constantly rotates the front group cam barrel 3 clockwise (forward rotation direction) around the optical axis within the guide barrel 2 when viewing the photographic lens A from the front (first lens group, side). It is strong.
一方、固定鏡筒4の筒面には、第6図の要部展開平面図
に示したように、筒周の略180°対向2ケ所位置に光
軸に並行(筒面母線方向)な2条の直進溝孔21・21
を具備させである。又該固定鏡筒4に外嵌の後群カム筒
5の筒面には、筒周の略180°対向2ケ所位置にへり
カルカム溝孔22・22を具備させである。そして固定
鏡筒4に内嵌の第4レンズ群鏡筒10に筒周の略180
°対向2ケ所位置にビン軸23・23を植設し、それ等
のビン軸を夫々前記固定鏡筒4の直進溝孔21と前記後
群カム筒5のへりカルカム溝孔22の両者の交叉部に貫
通係合させである。On the other hand, on the cylinder surface of the fixed lens barrel 4, as shown in the developed plan view of the main part in FIG. Linear straight grooves 21 and 21
It is equipped with. Further, the cylindrical surface of the rear group cam cylinder 5 fitted onto the fixed lens barrel 4 is provided with edge cam grooves 22 at two positions approximately 180° opposite to each other around the cylinder periphery. Then, the fourth lens group barrel 10, which is fitted inside the fixed barrel 4, has a cylinder circumference of approximately 180 mm.
° Bottle shafts 23, 23 are installed at two opposing positions, and these bottle shafts are inserted into the intersection of the straight groove hole 21 of the fixed lens barrel 4 and the edge cam groove hole 22 of the rear group cam tube 5, respectively. The part is penetrated and engaged.
従って第4レンズ群鏡筒10即ち第4レンズ群L4は、
固定鏡筒4に対して後群カム筒5が光軸口りに正逆回動
されることにより固定鏡筒4内において光軸方向に後進
・前進移動する。24は固定鏡筒4の後端部と第4レン
ズ群鏡筒10との間に張設した後群付勢ばねであり、第
4レンズ群鏡筒10を固定鏡筒4内を後進する方向に常
時引張り付勢している。Therefore, the fourth lens group barrel 10, that is, the fourth lens group L4,
The rear group cam barrel 5 is rotated forward and backward about the optical axis with respect to the fixed lens barrel 4, thereby moving backward and forward in the optical axis direction within the fixed lens barrel 4. 24 is a rear group biasing spring stretched between the rear end of the fixed lens barrel 4 and the fourth lens group barrel 10; is constantly under tension.
25は一端を後群カム筒5の先端側の外面に固定し、他
端を前群カム筒3の後端フランジ部に形成した切欠き溝
部26に嵌入係合させたキ一部材である。従って後群カ
ム筒5と前群カム筒3はこのキ一部材25を介して相互
に回転力が伝達されて、一方が正逆回転勤すると他方も
一体に正逆回転勤する。A key member 25 has one end fixed to the outer surface of the front end side of the rear group cam cylinder 5 and the other end fitted into a notch groove 26 formed in the rear end flange of the front group cam cylinder 3. Therefore, rotational force is transmitted between the rear group cam cylinder 5 and the front group cam cylinder 3 through this key member 25, and when one rotates in the forward and reverse directions, the other also rotates in the forward and reverse directions.
27は後群カム筒5の外面に一体に設けた、後述する中
間装置Bとの連動爪である。Reference numeral 27 denotes an interlocking pawl that is integrally provided on the outer surface of the rear group cam cylinder 5 and is interlocked with an intermediate device B, which will be described later.
28は前記装着用マウント6に具備させた電気信号ビン
アセンブリである。Reference numeral 28 denotes an electric signal bin assembly provided on the mounting mount 6.
29は外装環1と案内筒2との間の隙間空間に案内筒外
面に固定して納めた回路ユニットであり、前述絞りユニ
ット11及び電気信号ビンアセンブリ28と不図示のリ
ード線を介して電気的に結合している。A circuit unit 29 is fixed to the outer surface of the guide tube in a gap space between the outer ring 1 and the guide tube 2, and is connected to the aperture unit 11 and the electric signal bin assembly 28 via lead wires (not shown). are connected to each other.
30は外装環1と案内筒2との間の隙間空間に納めた、
光軸と同心の円弧板状の倍率表示板であり、該表示板に
一体の下向き折白げ脚部30aを案内筒2の第2の周溝
孔14を貫通させて案内筒2に内嵌している前群カム筒
3の外面に一体に固着させることにより前群カム筒3に
支持させである。従って該倍率表示板30は前群カム筒
3が正逆回転されると該カム筒と一体に光軸まわりに正
逆回動する。30 is housed in the gap space between the outer ring 1 and the guide tube 2,
It is a magnification display plate in the shape of an arc plate concentric with the optical axis, and a downwardly folded leg portion 30a integral with the display plate is passed through the second circumferential groove hole 14 of the guide tube 2 and fitted into the guide tube 2. It is supported by the front group cam cylinder 3 by being integrally fixed to the outer surface of the front group cam cylinder 3. Therefore, when the front group cam barrel 3 is rotated in the forward and reverse directions, the magnification display plate 30 rotates in the forward and reverse directions around the optical axis together with the cam barrel.
31は外装環1の外面に設けた窓孔、31aはこの窓孔
なカバーさせた防塵用の透明カバ一部材であり、この窓
孔から前記倍率表示板30の外面に表示されている倍率
数が視認される。31 is a window hole provided on the outer surface of the exterior ring 1; 31a is a transparent cover member for dustproofing that covers this window hole; is visible.
32(第7・8図)は外装環1の後端側の外面に付した
固定指標であり、撮影レンズAを後述する中間装置Bに
対して装着する際の合せ目印である。Reference numeral 32 (FIGS. 7 and 8) is a fixed index attached to the outer surface of the rear end side of the exterior ring 1, and is an alignment mark when attaching the photographing lens A to an intermediate device B, which will be described later.
第1〜第4レンズ群り、−L、 、及び絞りDは前述第
2図・第3図における第1〜第4レンズ群L1〜L4、
及び絞りDに対応しており、後群カム筒5が固定鏡筒4
に対して正逆回動されることにより、それに連動して第
ルンズ群鏡筒7即ち第ルンズ群LI%及び第4レンズ群
鏡筒lO即ち第4レンズ群L4が光軸に沿って夫々不動
である第2レンズ群り、・第3レンズ群L3から離れ方
向に移動(第ルンズ群り、は光軸に沿って前進動、第4
レンズ群L4は逆に後進動)、又は第2レンズ群L2・
第3レンズ群L3に接近する方向に移動(第ルンズ群り
、は光軸に沿って後進動、第4レンズ群L4は逆に前進
動)して、レンズ群配列が第2図(a) (c)、
第3図(a) (c)の短焦点状態の配列(倍率β
璽又はβ3の配列状態)、又は第2図(b)・第3図(
b)の長焦点状態の配列(倍率β2 (等倍)の配列状
態)に無段階式に変化する。The first to fourth lens groups, -L, and the aperture D are the first to fourth lens groups L1 to L4 in FIGS. 2 and 3,
and aperture D, and the rear group cam barrel 5 is the fixed lens barrel 4.
, the lens barrel 7 of the lens group, that is, the lens group LI%, and the fourth lens group barrel 1O, that is, the fourth lens group L4 are immobile along the optical axis. The second lens group moves away from the third lens group L3 (the second lens group moves forward along the optical axis, the fourth lens group moves forward along the optical axis,
On the contrary, the lens group L4 moves backward), or the second lens group L2.
The lens group moves in the direction approaching the third lens group L3 (the third lens group moves backward along the optical axis, and the fourth lens group L4 moves forward), and the lens group arrangement is as shown in Figure 2 (a). (c),
Figure 3 (a) and (c) short focus state array (magnification β
arrangement state of the seal or β3), or Fig. 2 (b) and Fig. 3 (
b) Steplessly changes to the long focal state array (array state with magnification β2 (same magnification)).
第5図の装置の縦断側面図においては撮影レンズAの第
1〜第4レンズ群L1〜L4及び絞りDについて光軸0
−0を境にして光軸より上半部は倍率β1又はβ3の短
焦点状態時の相互配列を、下半部は倍率β2 (等倍)
の長焦点状態時の相互配列を示している。In the longitudinal sectional side view of the device in FIG.
The upper half from the optical axis with -0 as the border shows the mutual arrangement in the short focus state with magnification β1 or β3, and the lower half shows the magnification β2 (same magnification).
The mutual arrangement of the two images in the long focus state is shown.
■、中間装置Bの構成(第5・9〜13図)第5図の縦
断側面図、第9図の側面図、第10図の一部切欠き正面
図において、50は前後方向に長い案内レール部材、5
0aはその上面長手に沿って固定して設けたラック、5
1は撮影レンズ取付は支持部材(以下、第1支持部材と
記す)であり、前記案内レール部材50上に、基部側を
レール部材に対してあり溝係合させてレール部材長手に
沿って滑らかに安定に前進・後進摺動移動自由に搭載さ
せである。52はカメラ取付は支持部材(以下、第2支
持部材と記す)であり、前記第1支持部材51の後側に
おいて、同じく案内レール部材50上に、基部側をレー
ル部材に対してあり溝係合させてレール部材長手に沿っ
て滑らかに安定に前進・後進摺動移動自由に搭載させで
ある。■, Configuration of intermediate device B (Figs. 5, 9 to 13) In the vertical sectional side view in Fig. 5, the side view in Fig. 9, and the partially cutaway front view in Fig. 10, 50 is a long guide in the front and rear direction. Rail member, 5
0a is a rack fixedly provided along the length of the upper surface; 5
Reference numeral 1 denotes a support member (hereinafter referred to as the first support member) on which the photographing lens is attached, and is mounted on the guide rail member 50 so that the base side engages with the rail member in a dovetail groove and smoothly moves along the length of the rail member. It can be mounted freely and stably in forward and backward sliding movement. Reference numeral 52 denotes a support member (hereinafter referred to as a second support member) for mounting the camera, and on the rear side of the first support member 51, a dovetail groove is provided on the guide rail member 50 with the base side facing the rail member. In addition, the rail member can be smoothly and stably slid forward and backward along the length of the rail member.
53は第1支持部材51の基部側に該部材を左右方向に
貫通させて回転自由に軸受させて配設した駆動ノブ軸、
54・54は該ノブ軸の左右両端部に固着したノブ、5
5・56は該ノブ軸の途中部に夫々固着させたピニオン
ギヤと駆動ギヤである。従ってノブ54を正逆回転操作
するととニオンギャ55と前記案内レール部材50側の
ラック50aとが噛合していることにより第1部材51
がレール部材50に沿って前進・後進摺動移動する。Reference numeral 53 denotes a drive knob shaft disposed on the base side of the first support member 51 so as to pass through the member in the left-right direction and be freely rotatably supported;
54, 54 are knobs fixed to both left and right ends of the knob shaft;
Reference numerals 5 and 56 denote a pinion gear and a drive gear respectively fixed to the middle of the knob shaft. Therefore, when the knob 54 is rotated in the forward and reverse directions, the first member 51 is engaged with the rack 50a on the guide rail member 50 side.
slides forward and backward along the rail member 50.
第2支持部材52についても同様に、その基部側に該部
材を貫通させて回転自由に軸受させて駆動ノブ軸57を
配設し、その途中部に前記案内レール部材50側のラッ
ク50aに噛合うピニオンギヤ59を設けてあり、ノブ
軸57の左右両端部に固着したノブ58を正逆回転操作
することにより、該第2部材52がレール部材50に沿
って前進・後進摺動移動する。Similarly, regarding the second support member 52, a drive knob shaft 57 is disposed through the base side of the second support member 52 so as to be freely rotatably supported, and a drive knob shaft 57 is disposed in the middle thereof to be engaged with the rack 50a on the guide rail member 50 side. Matching pinion gears 59 are provided, and the second member 52 is slid forward and backward along the rail member 50 by rotating knobs 58 fixed to both left and right ends of the knob shaft 57 in forward and reverse directions.
第1部材51において、60(第10図)は撮影レンズ
嵌入装着用開口、61は該部材51の前面側において開
口60と同心に固着した環状マウント、62・63(第
5図)は該部材51の背面側において前記開口60と同
心に回転自由に組付けた前後一対の第1と第2の連動リ
ング、64はこの第1と第2の連動リング受であり、部
材51に固定され、該第1と第2の連動リング62・6
3を回動可能に保持している。62a・63aは上記第
1と第2の各連動リング62・63の内周縁の一部に内
向きに設けた第1と第2の連動爪、62b・63bは上
記第1と第2の各連動リング62・63の各側面にリン
グと同心に一体的に設けた第1と第2の環状の連動ギヤ
である。そして前記駆動ノブ軸53に一体の駆動ギヤ5
6と上記第2の連動ギヤ63bとを連動ギヤトレイン0
1〜G7を介して連絡させである。ギヤG1・G2、同
G3・G4、同G5・G6は夫々同軸の一体回転2段ギ
ヤである。又上記ギヤトレインのファイナルギヤG7(
第2の連動ギヤ63bと噛合するギヤ)と第1の連動ギ
ヤ62bとを差動ギヤG8(第10図)を介して噛合さ
せである。In the first member 51, 60 (Fig. 10) is an opening for inserting a photographic lens, 61 is an annular mount fixed concentrically with the opening 60 on the front side of the member 51, and 62 and 63 (Fig. 5) are the members. A pair of front and rear interlocking rings 64 are rotatably assembled concentrically with the opening 60 on the back side of the member 51, and 64 are the first and second interlocking ring receivers, which are fixed to the member 51. The first and second interlocking rings 62 and 6
3 is rotatably held. 62a and 63a are first and second interlocking claws provided inwardly on a part of the inner periphery of the first and second interlocking rings 62 and 63, and 62b and 63b are the first and second interlocking claws, respectively. These are first and second annular interlocking gears that are integrally provided on each side of the interlocking rings 62 and 63 so as to be concentric with the rings. A drive gear 5 integrated with the drive knob shaft 53
6 and the second interlocking gear 63b are connected to the interlocking gear train 0.
We will contact you via 1 to G7. Gears G1 and G2, G3 and G4, and G5 and G6 are coaxial, integrally rotating two-stage gears. Also, the final gear G7 of the above gear train (
The second interlocking gear 63b and the first interlocking gear 62b are engaged with each other via a differential gear G8 (FIG. 10).
従って、前述したようにII影レンズ取付は支持部材で
ある第1支持部材51をノブ54の正逆回転操作により
案内レール部材50に沿って前進・後進摺動移動させた
とき、その移動に連動して駆動ギヤ56の正転又は逆転
の回転力がギヤトレイン01〜G7を介して第2の連動
ギヤ63bへ伝達されると共に、更に差動ギヤG8を介
して第1の連動ギヤ62bへ伝達されて、第1及び第2
の2つの連動リング62・63が互に回転角は等しいけ
れども、回転方向は互に逆となる関係をもって正逆転駆
動される。Therefore, as described above, the II shadow lens is attached when the first support member 51, which is a support member, is slid forward and backward along the guide rail member 50 by rotating the knob 54 forward and backward. The forward or reverse rotational force of the drive gear 56 is transmitted to the second interlocking gear 63b via the gear trains 01 to G7, and further transmitted to the first interlocking gear 62b via the differential gear G8. and the first and second
Although the two interlocking rings 62 and 63 have the same rotation angle, they are driven in forward and reverse directions in opposite directions.
65(第5図)は前記環状マウント61の外面の一部に
ビン先端部を弾性ばね板部材65aで常時突出付勢させ
て配設した電気信号ビンアセンブリであり、第1部材5
1の撮影レンズ装着用開口60に撮影レンズAが正規に
装着された状態において該電気信号アセンブリ65に対
して撮影レンズA側の前記電気信号アセンブリ28が正
規に対面対応して両アセンブリ65・28の対応ビン同
士が押圧接触して両アセンブリ65・28相互が電気的
に連絡状態となる。Reference numeral 65 (FIG. 5) is an electric signal bottle assembly in which the tip of the bottle is always urged to protrude by an elastic spring plate member 65a on a part of the outer surface of the annular mount 61, and the first member 5
When the photographing lens A is properly attached to the photographing lens mounting opening 60 of No. 1, the electric signal assembly 28 on the photographing lens A side faces the electric signal assembly 65, and both assemblies 65 and 28 The corresponding bottles are pressed into contact with each other, and both assemblies 65 and 28 are in electrical communication with each other.
66(第10図)は環状マウント61の最上位部の外面
に付した固定指標であり、撮影レンズA側に付した固定
指標32(第7・8図)との合せ目印である。Reference numeral 66 (FIG. 10) is a fixed index attached to the outer surface of the uppermost portion of the annular mount 61, and is a mark for alignment with the fixed index 32 (FIGS. 7 and 8) attached to the photographing lens A side.
カメラ取付は支持部材としての第2支持部材52におい
て、67はカメラ装着用開口、68は該部材52の背面
側において開口67と同心、に固着したカメラ装着用の
環状マウントである。For mounting the camera, in the second support member 52 as a support member, 67 is an opening for mounting the camera, and 68 is an annular mount for mounting the camera fixed on the back side of the member 52 and concentric with the opening 67.
69は第1支持部材51と第2部材52との間に、先端
部を第1支持部材51に定着し、後端部を第2支持部材
52に定着して介在させて第1支持部材51側の撮影レ
ンズ嵌入装着用開口60と第2支持部材52側のカメラ
装着用開口67とを光軸方向に連通連絡させた伸縮自在
構成の暗筺部としての蛇腹である。69 is interposed between the first support member 51 and the second member 52, with the front end fixed to the first support member 51 and the rear end fixed to the second support member 52. It is a bellows serving as a dark housing part with a telescopic structure in which the photographing lens fitting opening 60 on the side and the camera mounting opening 67 on the second support member 52 side are communicated in the optical axis direction.
70は上記カメラ装着用の環状マウント68に具備させ
た電気信号ビンアセンブリである。Reference numeral 70 denotes an electrical signal bin assembly mounted on the annular mount 68 for mounting the camera.
マウント68に対してカメラC側の不図示の対向マウン
トを係合させることにより第2支持部材52に対してカ
メラCがしっかりと装着支持される。By engaging a facing mount (not shown) on the camera C side with the mount 68, the camera C is firmly mounted and supported on the second support member 52.
カメラCを第2支持部材52に対してマウント68を介
して正規に装着支持させた状態において、マウント68
側の電気信号ビンアセノブリフ0に対してカメラC側の
不図示の電気信号ビンアセンブリが対応接触し両アセン
ブリ相互が電気的に連絡状態となる。When the camera C is properly mounted and supported on the second support member 52 via the mount 68, the mount 68
An electrical signal bin assembly (not shown) on the camera C side comes into contact with the electrical signal bin acenobluff 0 on the side, and both assemblies are in electrical communication with each other.
上記第2支持部材52側の電気信号ビンアセンブリ70
と、前記第1支持部材51側の同アセンブリ65は不図
示のリード線により電気的に連絡させである。従って中
間装置Bの第1支持部材51に撮影レンズAを、第2支
持部材52にカメラCを夫々正規に装着支持させた状態
に右いてはカメラC側の電気回路と撮影レンズA側の電
気回路が互に連絡状態となる。Electrical signal bin assembly 70 on the second support member 52 side
The assembly 65 on the first support member 51 side is electrically connected to each other by a lead wire (not shown). Therefore, when the photographic lens A is properly mounted and supported on the first support member 51 of the intermediate device B and the camera C is properly mounted and supported on the second support member 52, the electric circuit on the camera C side and the electric circuit on the photographic lens A side are shown. The circuits are in contact with each other.
蛇[169は、第1支持部材51又は/及び第2支持部
材52をノブ54や58の正逆回転操作により案内レー
ル部材50に沿って前進・後進動させて部材51・52
の′相互間隔を大小変更したときその相互間隔の大小に
応じて伸縮変化し、第1支持部材51側の撮影レンズ嵌
入装着用開口60と、第2支持部材52側のカメラ装着
用開口67とが光軸に沿う暗路をもって常に連通連絡さ
れる。The snake [169] moves the first support member 51 and/or the second support member 52 forward and backward along the guide rail member 50 by rotating the knobs 54 and 58 in the forward and reverse directions to move the members 51 and 52.
When the mutual distance is changed, the opening 60 for inserting the photographing lens on the first support member 51 side and the opening 67 for camera installation on the second support member 52 side expand and contract depending on the size of the mutual distance. are constantly communicated through a dark path along the optical axis.
■、中間装置lBと撮影レンズAの連動中間装置B(以
下ベローズと記す)の撮影レンズ取付は支持部材たる第
1支持部材51に対する撮影レンズAの装着は、第1支
持部材51の撮影レンズ嵌入装着用開ロ60内に撮影レ
ンズAの後群カム筒5部分を挿入し、撮影レンズA側の
固定指標32が第1支持部材51側の固定指標66に対
応一致にするように撮影レンズAの回動角姿勢を調整し
て撮影レンズA側のマウント6を第1支持部材51側の
マウント61に当接させ、撮影レンズAを時計方向に不
図示のストッパ部でそれ以上の回動が阻止されるまで十
分に回動する。(本実施例装置では略60’回動操作)
これによりマウント6・61の相互係合で撮影レンズA
が第1支持部材51に安定に取付は支持される。正規の
装着状態において撮影レンズAは外装環1の倍率表示窓
孔31部分が上向きとなった回動角姿勢状態となり、又
電気信号ビンアセンブリ28が第1支持部材51側の同
アセンブリ65に正規に対面対応して互に電気的に連絡
状態となる。(2) Interlocking of the intermediate device IB and the photographing lens A The photographing lens of the intermediate device B (hereinafter referred to as bellows) is attached to the first support member 51, which is a support member, by fitting the photographing lens A into the first support member 51. Insert the rear group cam barrel 5 portion of the photographing lens A into the mounting opening 60, and attach the photographing lens A so that the fixed index 32 on the photographing lens A side corresponds to the fixed index 66 on the first support member 51 side. The mount 6 on the side of the photographic lens A is brought into contact with the mount 61 on the side of the first support member 51 by adjusting the rotation angle posture of the lens A, and further rotation of the photographic lens A in the clockwise direction is prevented by a stopper portion (not shown). Rotate enough until blocked. (Approximately 60' rotation operation in this example device)
As a result, the mounts 6 and 61 engage with each other and the photographing lens A
is stably attached and supported by the first support member 51. In the normal mounting state, the photographing lens A is in a rotating angle position in which the magnification display window 31 portion of the outer ring 1 faces upward, and the electric signal bin assembly 28 is normally attached to the same assembly 65 on the first support member 51 side. They face each other face-to-face and are electrically connected to each other.
第1支持部材51に対する撮影レンズの装着のために上
記のような要領で撮影レンズAを第1支持部材51の開
口60に嵌入して回動操作したとき、撮影レンズAの後
群カム筒5の外面に突出させである連動爪27が第1支
持部材51側の第2の連動爪63aに当接して係止され
る。そのために後群カム筒5.このカム筒とキ一部材2
5を介して一体の前群カム筒3はその時点で回動が停止
されるが、外装環1、これと一体にねし止め結合されて
いる案内筒2、この案内筒に一体にねし止め結合されて
いる固定m筒4、この固定鏡筒の先端フランジ部に一体
に取付は固定されているマウント6はストッパ部(不図
示)でそれ以上の回動が阻止されるまで更に回動する。When the photographing lens A is inserted into the opening 60 of the first support member 51 and rotated in the manner described above in order to attach the photographing lens to the first support member 51, the rear group cam barrel 5 of the photographic lens A is rotated. An interlocking pawl 27 protruding from the outer surface of the support member 51 contacts and is locked with the second interlocking pawl 63a on the first support member 51 side. For this reason, the rear group cam cylinder 5. This cam cylinder and key part 2
The rotation of the front group cam cylinder 3, which is integral with the outer ring 1 via the ring 5, is stopped at that point. The fixed m-barrel 4, which is fixedly connected, and the mount 6, which is integrally attached and fixed to the tip flange of this fixed lens barrel, are further rotated until further rotation is prevented by a stopper part (not shown). do.
これにより前群カム筒3の突起部材18と案内筒2の植
設ビン19との間に張設したカム筒駆動ばね20が引き
伸ばされた状態になる。第6図の要部の展開平面図は該
ばね20が引き伸ばされている状態時を示している。つ
まり撮影レンズAをベローズBの第1支持部利51に装
着した後は上記のように引き伸ばされたばね20の反力
により撮影レンズAの後群カム筒5の連動爪2フが第1
支持部材51側の第2の連動爪63aに常に遊び動きな
く押し付けられて当接した状態に保たれる。As a result, the cam cylinder drive spring 20 stretched between the protruding member 18 of the front group cam cylinder 3 and the planting pin 19 of the guide cylinder 2 is in a stretched state. The developed plan view of the main part of FIG. 6 shows the spring 20 in a stretched state. That is, after the photographic lens A is attached to the first support portion 51 of the bellows B, the interlocking claw 2 of the rear group cam barrel 5 of the photographic lens A is moved to the first position by the reaction force of the spring 20 stretched as described above.
It is always pressed and kept in contact with the second interlocking pawl 63a on the side of the support member 51 without play.
ベローズBの第1支持部材51に対して上記のように撮
影レンズAを、第2支持部材52にカメラCを夫々装着
した状態において、第1支持部材51を、ノブ54を正
転・逆転操作して案内レール部材50上を前進動・後進
動させると、これに連動して駆動ギヤ56の正転・逆転
力がギヤトレインGING7を介して第2の連動ギヤ6
3bへ伝達されて第2の連動爪63aを有している第2
の連動リング63が正転・逆転回動される。文筆1の連
動ギヤ62bがギヤG7・差動ギヤG8を介して正転・
逆転力を受け、第2の連動ギヤ63bと回転角は等しい
けれども回転方向は逆となる関係をもって正逆転されて
第1の連動爪62aを有している第1の連動リング62
が正転・逆転回動される。即ち第2の連動爪63aを有
している第2の連動リング63と、第1の連動爪62a
を有している第1の連動リング62が第1支持部材51
の案内レール部材50に沿う前進・後進動操作に連動し
て上記の関係をもって正転・逆転回動する。With the photographic lens A attached to the first support member 51 of the bellows B as described above, and the camera C attached to the second support member 52, the first support member 51 and the knob 54 are rotated in the forward and reverse directions. When the guide rail member 50 is moved forward/reverse on the guide rail member 50, the forward/reverse rotation force of the drive gear 56 is transmitted to the second interlocking gear 6 via the gear train GING7.
3b and has a second interlocking pawl 63a.
The interlocking ring 63 is rotated forward and backward. The interlocking gear 62b of the writer 1 rotates in the normal direction via the gear G7 and the differential gear G8.
The first interlocking ring 62 receives a reversing force and is rotated forward and reverse in a relationship such that the rotation angle is equal to that of the second interlocking gear 63b but the rotation direction is opposite, and the first interlocking ring 62 has a first interlocking pawl 62a.
is rotated forward and reverse. That is, a second interlocking ring 63 having a second interlocking pawl 63a, and a first interlocking pawl 62a.
The first interlocking ring 62 having a
In conjunction with the forward and backward movement operations along the guide rail member 50, the motor rotates forward and backward in the above relationship.
そして上記第2の連動リング63の第2の連動爪63a
、又は第1の連動リング62の第1の連動爪62aの何
れかに対して、撮影レンズA側の連動爪27が前述引き
伸ばし状態のはね20の反力で常に係合当接しており、
従って案内レール部材50に沿う第1支持部材51の前
進・後進動操作に連動する第2又は第1の連動リング6
3・62の正転・逆転回動に連動して撮影レンズAの後
群カム筒5が固定鏡筒4の外まわりな正転・逆転回動さ
れる。又この後群カム筒5に対してキー部材25を介し
て一体の前群カム筒3も後群カム筒5と一緒に案内筒2
の内まわりな正転・逆転回動される。この前群及び後群
カム筒3・5の正転・逆転回動に連動して前述したよう
に第ルンズ群鏡筒7即ち第ルンズ群L1%及び第4レン
ズ群鏡筒10即ち第4レンズ群L4が光軸に沿って、夫
々不動である第2レンズ群L2 ・絞りD・第3レンズ
群L3に対して離れ方向又は接近方向に移動・駆動され
、第2図(a) (C)、第3図(a) (C)
の短焦点状態のレンズ配列(倍率8皿又はβ3の配列状
態)、又は第2図(b)第3図(b)の長焦点状態のレ
ンズ配列(倍率β2 (等倍))に無段階式に変化する
。And the second interlocking claw 63a of the second interlocking ring 63
, or the first interlocking claw 62a of the first interlocking ring 62, the interlocking claw 27 on the photographing lens A side is always in engagement contact with the reaction force of the spring 20 in the above-mentioned stretched state,
Therefore, the second or first interlocking ring 6 is interlocked with the forward/backward movement operation of the first support member 51 along the guide rail member 50.
In conjunction with the forward and reverse rotations of lenses 3 and 62, the rear group cam barrel 5 of the photographing lens A is rotated in the forward and reverse directions around the outside of the fixed lens barrel 4. Also, the front group cam cylinder 3, which is integrated with the rear group cam cylinder 5 via the key member 25, is connected to the guide cylinder 2 together with the rear group cam cylinder 5.
Rotates forward and reverse inwardly. In conjunction with the forward and reverse rotations of the front group and rear group cam barrels 3 and 5, as described above, the lens group lens barrel 7, that is, the lens group L1%, and the fourth lens group lens barrel 10, that is, the fourth lens. The lens group L4 is moved and driven along the optical axis in the direction away from or toward the second lens group L2, the diaphragm D, and the third lens group L3, which are stationary, respectively. , Figure 3(a) (C)
Stepless method for short focal length lens array (magnification 8 plates or β3 array) or long focal length lens array (magnification β2 (same magnification)) as shown in Figures 2(b) and 3(b). Changes to
■具体的に第2図(a)の低倍率側(撮影倍率βI)か
ら高倍率側へ倍率を変化β、→β2→β3させる場合に
は、ベローズBの第1支持部材51のノブ54を正転操
作して案内レール部材50に沿って前進動させていく。■Specifically, when changing the magnification from the low magnification side (imaging magnification βI) to the high magnification side β, → β2 → β3 in FIG. 2(a), turn the knob 54 of the first support member 51 of the bellows B. It is rotated in the normal direction to move forward along the guide rail member 50.
第5図のように案内レール部材50の後端部側に位置さ
せた第2支持部材52に対して第1支持部材51が最も
接近した低倍率状態においては、レンズAとベローズB
の連動機構は、第11図のようにレンズA側の連動爪2
7とベローズ部側の第2の連動爪63aが当接している
。In the low magnification state where the first support member 51 is closest to the second support member 52 located on the rear end side of the guide rail member 50 as shown in FIG.
The interlocking mechanism is the interlocking pawl 2 on the lens A side as shown in Figure 11.
7 and the second interlocking pawl 63a on the bellows portion side are in contact with each other.
■この状態からノブ54を正回転操作してベローズBの
第1支持部材51を第5図の2点鎖線示のようにレール
部材50の略中間点位置に前進移動させると撮影倍率は
等倍β2になるようになっている。この時、レンズAと
ベローズhの連動機構は第12図のようになり、レンズ
A側の連動爪27と、ベローズ部側の第2及び第1の連
動爪63a及び62a(図では爪63aと重なっている
ため見えない)が当接している。■ From this state, rotate the knob 54 in the forward direction to move the first support member 51 of the bellows B forward to the approximately midpoint position of the rail member 50 as shown by the two-dot chain line in FIG. It is designed to be β2. At this time, the interlocking mechanism between the lens A and the bellows h is as shown in FIG. (cannot be seen because they overlap) are in contact with each other.
■さらにノブ54を正回転操作してベローズBの第1支
持部材51を第5図の3点鎖線示のようにレール部材5
0の先端寄りの位置に前進移動させると、撮影倍率は、
等倍β2からさらに高倍率β3側になり、この時、レン
ズAとベローズBの連動機構は第13図のようになり、
レンズA側の連動爪27とへローズ部側の第1の連動爪
62aが当接している。■Furthermore, rotate the knob 54 in the normal direction to move the first support member 51 of the bellows B to the rail member 5 as shown by the three-dot chain line in FIG.
If you move it forward to a position closer to the tip of 0, the imaging magnification will be
From the same magnification β2 to the higher magnification β3, at this time the interlocking mechanism between lens A and bellows B becomes as shown in Fig. 13.
The interlocking claw 27 on the lens A side is in contact with the first interlocking claw 62a on the hollow portion side.
上記■→■→■の操作で、撮影レンズAの後群カム筒5
及び前群カム筒3はベローズBの連動リング63・62
の動きに伴い、低倍率β、から等倍率β2、等倍率β2
から高倍率β3へと回転方向が逆転する。そして各レン
ズ群Ll〜L4及び絞りDの動きは第3図に示すように
なる。また予定結像面F(カメラC内のフィルム面)に
対する各レンズ群Ll〜L4及び絞りDの動きは第2図
に示すようになる。By the above operation ■→■→■, the rear group cam tube 5 of the photographic lens A is
And the front group cam cylinder 3 is connected to the interlocking rings 63 and 62 of the bellows B.
With the movement of , from low magnification β to equal magnification β2 to equal magnification β2
The direction of rotation is reversed from to high magnification β3. The movements of each of the lens groups Ll to L4 and the aperture D are as shown in FIG. Further, the movements of each of the lens groups L1 to L4 and the diaphragm D with respect to the planned image forming plane F (the film plane in the camera C) are as shown in FIG.
さらに第ルンズ群鏡筒7と外装環1の先端部の間には前
群付勢ばね17が設置され伸長方向に第ルンズ群鏡筒7
を付勢しているために前群カム筒3のへりカルカム溝孔
15に貫通しているビン軸16のばね17の伸長方向へ
の動きを付勢力によって助けている。また同時にへりカ
ルカム溝孔15に対するビン軸16の位置を付勢力によ
って一方向に押し付けているためビン軸16の位置精度
を精度良く決めることになっている。Furthermore, a front group biasing spring 17 is installed between the first lens group lens barrel 7 and the tip of the exterior ring 1, and a front group biasing spring 17 is installed between the first lens group lens barrel 7 and the tip of the outer ring 1.
The urging force assists the movement of the pin shaft 16 passing through the edge cam slot 15 of the front group cam cylinder 3 in the direction of extension of the spring 17. At the same time, since the position of the bottle shaft 16 relative to the hemlock cam slot 15 is pressed in one direction by the urging force, the positional accuracy of the bottle shaft 16 can be determined with high precision.
また、第4レンズ群鏡筒10と固定鏡筒4の端部の間に
は後群付勢ばね24が設置され、伸長方向に第4レンズ
群鏡筒10を付勢しているために、後群カム筒5のへり
カルカム溝孔22に嵌入しているビン軸23のばね24
の伸長方向への動きを助けている。また同時にへりカル
カム溝孔22に対するビン軸23の位置を付勢力によっ
て一方向に押し付けているためビン軸23の位置精度を
精度良く決めることになっている。Further, a rear group biasing spring 24 is installed between the fourth lens group barrel 10 and the end of the fixed lens barrel 4, and biases the fourth lens group barrel 10 in the extension direction. The spring 24 of the pin shaft 23 fitted into the edge cam slot 22 of the rear group cam cylinder 5
It helps the movement in the elongation direction. At the same time, since the position of the bottle shaft 23 relative to the edge cam slot 22 is pressed in one direction by the urging force, the positional accuracy of the bottle shaft 23 can be determined with high precision.
倍率表示板30は、上記のノブ54の正逆回転操作によ
る倍率変更に伴なう前群カム筒3の正逆回転に伴ない該
カム筒3と一体に回転し、ノブ54の回転操作で移動し
たベローズ部側の第1支持部材51の案内レール部材5
0上の現在位置に対応する倍率値表示部分が外装環1の
外面に設けられている上向きの窓孔31内に位置し、現
在時点の倍率値が指標31b(第7図)との対応におい
て正確に表示される。The magnification display plate 30 rotates together with the cam barrel 3 as the front group cam barrel 3 rotates in the forward and reverse directions to change the magnification by rotating the knob 54 in the forward and reverse directions. Guide rail member 5 of the first support member 51 on the moved bellows part side
The magnification value display portion corresponding to the current position on 0 is located in the upward facing window hole 31 provided on the outer surface of the outer ring 1, and the magnification value at the current time corresponds to the index 31b (FIG. 7). displayed accurately.
かくして本実施例のレンズ装置は中間装置B(ベローズ
)の伸縮量を撮影レンズAに伝達する連動部材を往復動
させる構成であることにより、■撮影レンズAの変倍レ
ンズ群り、−Lイを移動させるカム手段(カム筒)3・
5のカム交角θ(第6図)を大きく取る事が可能になり
、レンズ群移動が滑らかになり、変倍レンズ群の位置精
度が向上した。Thus, the lens device of this embodiment is configured to reciprocate the interlocking member that transmits the amount of expansion and contraction of the intermediate device B (bellows) to the photographic lens A, so that: ■ the variable magnification lens group of the photographic lens A, -L Cam means (cam tube) for moving 3.
It is now possible to increase the cam intersection angle θ (Fig. 6) of No. 5, smoothing the lens group movement and improving the positional accuracy of the variable power lens group.
■中間装置Bへの#!影レしズAの取付は角度以内で、
中間装置Bと撮影レンズAの連動部材63a・62a・
27の初期設定ができるようなカム筒の回動角が実現で
きた。■# to intermediate device B! The installation of the shadow lesbian A is within the angle,
Interlocking members 63a, 62a, between intermediate device B and photographic lens A
We were able to achieve a rotation angle of the cam cylinder that would allow 27 initial settings.
(発明の効果)
以上説明したように、本発明のレンズ装置は中間装置(
ベローズ)に撮影レンズの変倍レンズ群を移動させるた
めのカム手段のカム溝に対するビンの移動を往復させる
ための伝達機構を設けたことにより、レンズのカム筒へ
のカム溝の配置が容易になり、カム溝の接線と直進溝の
なす角度が比較的大きくとれるために、ビンの動きが滑
らかで、位置積度が良好なレンズを実現できるという効
果がある。(Effects of the Invention) As explained above, the lens device of the present invention has an intermediate device (
By providing a transmission mechanism for reciprocating the movement of the bottle relative to the cam groove of the cam means for moving the variable magnification lens group of the photographic lens in the bellows, the cam groove can be easily placed in the cam barrel of the lens. Since the angle between the tangent of the cam groove and the rectilinear groove is relatively large, it is possible to realize a lens with smooth movement of the bottle and good positional density.
第1図は接写撮影の原理モードグラフ、第2図・第3図
は夫々焦点距離可変撮影レンズの光学系モデル図、第4
図(a) (b) (c)はレンズ繰出し量と
撮影倍率の相関モデル図、第5図は装置の縦断側面図、
第6図は撮影レンズの要部(カム機構)の展開平面図、
第7図・第8図は撮影レンズの平面図と側面図、第9図
は中間装置(ベローズ)の側面図、第10図は一部切欠
き正面図、第11図・第12図・第13図は夫々撮影レ
ンズ側の連動爪と、中間装置側の連動爪との係合関係説
明図、第14図は従来のカム機構の要部の展開平面図で
ある。
Aは撮影レンズ(焦点距離可変Il影レンズ)、Bは中
間装置(ベローズ)、Cはカメラ、L、〜L4は第1〜
第4レンズ群、Dは絞り、5152は夫々中間装置の撮
影レンズ取付は支持部材(第1支持部材)とカメラ取付
は支持部材(第2支持部材)、50は案内レール部材、
54・5Bは支持部材移動操作ノブ。Figure 1 is a principle mode graph for close-up photography, Figures 2 and 3 are optical system model diagrams of variable focal length photography lenses, and Figure 4
Figures (a), (b), and (c) are correlation model diagrams of the lens extension amount and imaging magnification, and Figure 5 is a longitudinal side view of the device.
Figure 6 is a developed plan view of the main part of the photographic lens (cam mechanism).
Figures 7 and 8 are a plan view and side view of the photographic lens, Figure 9 is a side view of the intermediate device (bellows), Figure 10 is a partially cutaway front view, Figures 11, 12, and FIG. 13 is an explanatory diagram of the engagement relationship between the interlocking pawl on the photographing lens side and the interlocking pawl on the intermediate device side, respectively, and FIG. 14 is an exploded plan view of the main parts of the conventional cam mechanism. A is the photographing lens (focal length variable Il shadow lens), B is the intermediate device (bellows), C is the camera, L, ~L4 are the first ~
4th lens group, D is an aperture, 5152 is a support member (first support member) for mounting the photographing lens of the intermediate device, a support member (second support member) for camera mounting, 50 is a guide rail member,
54.5B is a support member movement operation knob.
Claims (1)
一方側と他方側とに装着支持させる伸縮式の中間装置と
からなるレンズ装置であり、 前記撮影レンズは光軸方向に移動する2群以上の変倍用
レンズ群を有し、該撮影レンズを装着支持させた中間装
置の伸縮量に連動して前記変倍用レンズ群をカム上で第
1の位置と第2の位置の間を移動させるカム手段を有し
、 前記中間装置の一方向の伸縮操作の間に変倍レンズ群を
カム手段のカムで第1の位置から第2の位置へ移動させ
た後に、該第2の位置から該第1の位置の方向へ該カム
の軌跡上をもどす伝達手段を有する、ことを特徴とする
レンズ装置。(1) A lens device consisting of a variable focal length photographing lens, a camera, and a retractable intermediate device for mounting and supporting both on one side and the other, and the photographing lens moves in the optical axis direction. The variable power lens group is moved between a first position and a second position on a cam in conjunction with the amount of expansion and contraction of an intermediate device on which the photographing lens is mounted and supported. cam means for moving the variable power lens group from the first position to the second position by the cam of the cam means during the unidirectional expansion/contraction operation of the intermediate device; A lens device comprising a transmission means for returning the trajectory of the cam from the position to the first position.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20072188A JPH0248616A (en) | 1988-08-11 | 1988-08-11 | Lens device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20072188A JPH0248616A (en) | 1988-08-11 | 1988-08-11 | Lens device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0248616A true JPH0248616A (en) | 1990-02-19 |
Family
ID=16429097
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20072188A Pending JPH0248616A (en) | 1988-08-11 | 1988-08-11 | Lens device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0248616A (en) |
-
1988
- 1988-08-11 JP JP20072188A patent/JPH0248616A/en active Pending
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6396645B1 (en) | Zoom lens barrel with focusing path and focal length switching path | |
US5739962A (en) | Lens mount | |
JP3312345B2 (en) | Lens barrel with built-in converter lens | |
US4945372A (en) | Camera | |
US6724541B2 (en) | Aperture regulating apparatus | |
US6965486B2 (en) | Zoom camera having lens barrel assembly adjustable focus and resolution power of lens | |
US5345287A (en) | Apparatus for correcting parallax and/or diopter of camera | |
US5077569A (en) | Close-up photography device | |
US4000501A (en) | Optical instrument with a zoom lens structure | |
US5194988A (en) | Device for correcting perspective distortions | |
US5570149A (en) | Camera having a collapsible mount type photographic optical system | |
US4179191A (en) | Adjusting mechanism for optical objective with lost-motion zone | |
JPH08234089A (en) | Lens barrel with built-in converter lens | |
JPH0248616A (en) | Lens device | |
US4558927A (en) | Zoom lens assembly | |
JPH0248615A (en) | Lens barrel for close-up photographing | |
JPH0248617A (en) | Lens barrel for close-up photographing | |
JPH0248612A (en) | Close-up photographing device | |
JP4041957B2 (en) | Lens device and assembly method thereof | |
JPH0248611A (en) | Lens barrel for close-up photographing | |
JPH01207731A (en) | Camera | |
JPS6343114A (en) | Lens body structure capable of switching its focal distance | |
US5732301A (en) | Camera having variable-sized image plane and image plane size indicator | |
JPS62209425A (en) | Zoom lens camera | |
JPH0248613A (en) | Close-up photographing device |