JPH03602B2 - - Google Patents

Info

Publication number
JPH03602B2
JPH03602B2 JP57159229A JP15922982A JPH03602B2 JP H03602 B2 JPH03602 B2 JP H03602B2 JP 57159229 A JP57159229 A JP 57159229A JP 15922982 A JP15922982 A JP 15922982A JP H03602 B2 JPH03602 B2 JP H03602B2
Authority
JP
Japan
Prior art keywords
frame
compensation
optical axis
pin
cam groove
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP57159229A
Other languages
Japanese (ja)
Other versions
JPS5948718A (en
Inventor
Takeshi Nakane
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Olympus Corp
Original Assignee
Olympus Optical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP57159229A priority Critical patent/JPS5948718A/en
Publication of JPS5948718A publication Critical patent/JPS5948718A/en
Publication of JPH03602B2 publication Critical patent/JPH03602B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
    • G02B7/105—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens with movable lens means specially adapted for focusing at close distances

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lens Barrels (AREA)
  • Lenses (AREA)

Description

【発明の詳細な説明】 本発明は、近接撮影可能なズームレンズ、更に
詳しくは、通常撮影状態から近接撮影状態に単一
の操作部材によつて切換可能なズームレンズに関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a zoom lens capable of close-up photography, and more particularly to a zoom lens that can be switched from a normal photography state to a close-up photography state by a single operating member.

単一操作部材の操作で通常撮影状態から近接撮
影状態に切り換えられるようにしたズームレンズ
については、既に特開昭56−83708号公報や特開
昭56−85712号公報等によつて提案されている。
しかし、上記特開昭56−83708号によるズームレ
ンズは、単一操作部材を使用するものではある
が、中間に切換板やばね等の切換部材を必要とし
ているので、部品点数が増加し、その構造が複雑
となる許りでなく、構造上切換え精度の信頼性を
低下させている。また、特開昭56−85712号によ
るズームレンズは、操作部材としての操作枠上に
設けられた、変倍レンズ枠の変倍ピンが嵌入して
係合するカム溝の変倍ピンホールド用凹部によつ
て、変倍レンズ枠を通常撮影領域←→近接撮影領域
の切換時に僅かながら動かさざるを得ないので、
設計されたレンズ位置に狂いが生じ、レンズ性能
を低下させてしまうという欠点を有している。 Zoom lenses that can be switched from a normal shooting state to a close-up shooting state by operating a single operating member have already been proposed in Japanese Patent Application Laid-Open No. 56-83708 and Japanese Patent Application Laid-Open No. 56-85712, etc. There is.
However, although the zoom lens disclosed in JP-A-56-83708 uses a single operating member, it requires a switching member such as a switching plate or a spring in the middle, which increases the number of parts. The structure is not only complicated, but also reduces the reliability of switching accuracy due to the structure. In addition, the zoom lens disclosed in Japanese Patent Application Laid-Open No. 56-85712 has a recess for holding a variable power pin in a cam groove that is provided on an operation frame as an operating member and into which a variable power pin of a variable power lens frame is inserted and engaged. Due to this, it is necessary to move the variable magnification lens frame slightly when switching from normal shooting area to close-up shooting area.
This has the disadvantage that the designed lens position may be distorted, resulting in a decrease in lens performance.

本発明の目的は、上記の欠点に鑑み、単一操作
部材の操作により、通常撮影領域から近接撮影領
域への切換および通常撮影領域から近接撮影領域
への切換が、極めて簡単な構造で、しかも円滑
に、正確に切換えられるようにした近接撮影可能
なズームレンズを提供するにある。 In view of the above drawbacks, an object of the present invention is to provide an extremely simple structure that allows switching from a normal shooting area to a close-up shooting area and from a normal shooting area to a close-up shooting area by operating a single operation member. To provide a zoom lens capable of close-up photography that can be smoothly and accurately switched.

以下、本発明を図示の実施例に基づいて説明す
る。 Hereinafter, the present invention will be explained based on illustrated embodiments.

第１図は、本発明の一実施例を示すズームレン
ズ０１の上半部の断面図である。なお、この断面
図は全体の構成を分り易くするために同一断面で
なく、総てのピンが見えるようにしてある。第１
図において、符号１はフオーカスレンズ群Ｌ１を
保持するフオーカスレンズ枠、２は操作枠、３は
リレー系レンズ群Ｌ４を保持する固定枠、４はズ
ーム枠、５は変倍レンズ群Ｌ２を保持する変倍レ
ンズ枠、６は補償レンズ群Ｌ３を保持する補償レ
ンズ枠、７は紅彩絞りケース、８はレンズマウン
ト部材をそれぞれ示している。 FIG. 1 is a sectional view of the upper half of a zoom lens 01 showing an embodiment of the present invention. Note that this cross-sectional view is not the same cross-section in order to make the overall configuration easier to understand, and all pins are shown. 1st
In the figure, numeral 1 is a focus lens frame that holds the focus lens group L1, 2 is an operation frame, 3 is a fixed frame that holds the relay lens group L4, 4 is a zoom frame, and 5 is a variable magnification lens group L2. 6 is a compensation lens frame that holds the compensation lens group L3, 7 is a iris diaphragm case, and 8 is a lens mount member.

上記フオーカスレンズ枠１は長い外筒１ｂと短
い内筒１ｃとが前端部における共通壁によつて一
体化された２重連筒からなり、内筒１ｃの後端部
外周には、上記固定枠３の先端部内周面に設けら
れたヘリコイドねじ３ｃに螺合するヘリコイドね
じ１ｄが設けられている。上記操作枠２は光軸方
向の進退によりズーム操作を行い、光軸周りの回
動により通常撮影時の合焦動作および近接撮影領
域への移行を行うようになつていて、後端部を共
通壁によつて一体化された外筒２ｂと内筒２ｃと
の２重連筒からなり、この内外筒2c，2b間に上
記フオーカスレンズ枠１の外筒１ｂが嵌入してい
る。そして、上記操作枠２の外筒２ｂの内面上に
は、上記フオーカスレンズ枠１の外筒１ｂの後端
部外周面上に植設された係合ピン１ａが嵌入する
光軸方向の直進溝２b1が設けられていて、フオー
カスレンズ枠１は操作枠２の光軸方向の移動に対
してはフリーとなり、同操作枠２の回動によつて
のみ、上記ヘリコイドねじ１ｄを介して光軸方向
に移動し合焦動作をするようになつている。 The focus lens frame 1 consists of a double barrel in which a long outer barrel 1b and a short inner barrel 1c are integrated by a common wall at the front end. A helicoid screw 1d is provided to be screwed into a helicoid screw 3c provided on the inner peripheral surface of the distal end of the frame 3. The operation frame 2 performs a zoom operation by moving forward and backward in the optical axis direction, and performs focusing operation during normal shooting and transition to the close-up shooting area by rotating around the optical axis, and the rear end is common. It consists of a double cylinder consisting of an outer cylinder 2b and an inner cylinder 2c that are integrated by a wall, and the outer cylinder 1b of the focus lens frame 1 is fitted between the inner and outer cylinders 2c and 2b. Then, on the inner surface of the outer cylinder 2b of the operation frame 2, an engaging pin 1a implanted on the outer circumferential surface of the rear end portion of the outer cylinder 1b of the focus lens frame 1 is inserted. A groove 2b1 is provided, and the focus lens frame 1 becomes free against movement of the operating frame 2 in the optical axis direction, and only by rotation of the operating frame 2, the focus lens frame 1 is moved through the helicoid screw 1d. It moves in the direction of the optical axis to perform focusing operations.

また、上記操作枠２の内筒２ｃの内面上には、
第２図の展開図に示すように、その前方（左方）
寄りに上記変倍レンズ枠５上に植設された変倍用
ピン５ａが嵌入する周方向の直線溝からなる変倍
用カム溝２b2が設けられており、同溝２b2の後方
（右方）には全周に亘る幅広な凹部２c1が設けら
れており、同凹部２c1の右側縁下方には切欠かれ
て傾斜面を有する三角形状カムからなる傾斜カム
２B3が形成されている。この傾斜カム２B3は、
後述する補償用ピン６a1，６a2が補償用カム溝４
b2の近接撮影領域内にある場合に、これに常に当
接し、操作枠２の遠距離側への回動により、その
傾斜カム面が補償用ピン６a1を押動して補償用カ
ム溝４b2の、通常撮影領域に復帰させる役目をす
るものである。 Moreover, on the inner surface of the inner cylinder 2c of the operation frame 2,
As shown in the exploded view in Figure 2, the front (left side)
A variable power cam groove 2b2 , which is a linear groove in the circumferential direction into which the variable power pin 5a implanted on the variable power lens frame 5 is fitted, is provided nearer to the variable power lens frame 5 . A wide recess 2c 1 is provided over the entire circumference of the recess 2c 1 , and an inclined cam 2B 3 consisting of a triangular cam having a notched and sloping surface is formed at the lower right edge of the recess 2c 1. . This inclined cam 2B3 is
Compensation pins 6a 1 and 6a 2 , which will be described later, are in the compensation cam groove 4.
b 2 , the inclined cam surface pushes the compensation pin 6a 1 and moves into the compensation cam groove when the operating frame 2 rotates toward the far side. 4b2 , which serves to return the camera to the normal shooting area.

また、上記凹部２c1の底面のほぼ中央部には、
同凹部２c1の深さより僅かに小さい厚みを有する
横長のストツパー部材２ｄが取り付けられてい
る。このストツパー部材２ｄは、その周方向の両
側面が固定枠３の外周面上に植設されたストツパ
ーピン３a1，３a2（第３図参照）にそれぞれ当接
することによつて操作枠２の回動範囲を確実に規
制するためのものである。なお、同ストツパー部
材２ｄの右上端部の切欠部２ｅは、通常撮影領域
の短焦点位置に操作枠２を移動させた後に該操作
枠２を近距離側に更に回動して、マクロ撮影状態
にした場合、一方のストツパーピン３a1が嵌入す
るためのものである。 Furthermore, approximately at the center of the bottom of the recess 2c 1 , there is a
A horizontally long stopper member 2d having a thickness slightly smaller than the depth of the recess 2c1 is attached. This stopper member 2d rotates the operation frame 2 by abutting stopper pins 3a 1 and 3a 2 (see FIG. 3), which are implanted on the outer circumferential surface of the fixed frame 3, on both circumferential sides of the stopper member 2d. This is to ensure that the range of movement is restricted. Note that the notch 2e at the upper right end of the stopper member 2d is used when the operating frame 2 is moved to the short focus position in the normal shooting area and then further rotated toward the short distance side to enable the macro shooting state. , one stopper pin 3a1 is inserted therein.

上記固定枠３上には、第３図の展開図に示すよ
うに、左下方部に光軸方向の直進溝３b1と周方向
溝３b1′からなり、上記変倍用ピン５ａが嵌入す
るＬ字状のカム溝が、右方上部にはズーム枠４の
外周面に植設された係合ピン４ａ（第４図参照）
が嵌入する周方向の直線溝３b3が、その下方には
上記補償レンズ枠６の外周面に植設された補償用
ピン６a1（第１図参照）が嵌入する光軸方向の直
進溝３b2がそれぞれ設けられている。 As shown in the developed view of FIG. 3, the fixed frame 3 has a straight groove 3b1 in the optical axis direction and a circumferential groove 3b1 ' in the lower left part, into which the variable power pin 5a is fitted. An L-shaped cam groove is located on the upper right side of the engagement pin 4a embedded in the outer peripheral surface of the zoom frame 4 (see Fig. 4).
A linear groove 3b 3 in the circumferential direction into which is fitted, and a linear groove 3b in the optical axis direction into which a compensation pin 6a 1 (see Fig. 1) embedded on the outer peripheral surface of the compensation lens frame 6 is fitted below. 2 are provided for each.

また、上記ズーム枠４は後半部の外径が一段と
細径となつていて、この細径部と上記固定枠３と
の間に上記補償レンズ枠６が光軸方向に移動可能
に嵌装されている。このズーム枠４には、第４図
の展開図に示すように、その左方大径部上に、上
記変倍用ピン５ａが貫通する斜方向のカム溝４b1
が設けられ、細径部下方には上記補償レンズ枠６
の外周面上の上記補償用ピン６a1と相対する内周
面位置に植設された補償用ピン６A2が嵌入する
Ｚ字状の補償用カム溝４b2が設けられている。な
お、上記紅彩絞りケース７は、上記補償レンズ枠
６の後端部に取付ねじ７ａによつて固着されてお
り、上記レンズマウント部材８は上記固定枠３の
後端部に取付ねじ８ａによつて固着されている。 Further, the outer diameter of the rear half of the zoom frame 4 is further reduced, and the compensation lens frame 6 is fitted between this narrow diameter portion and the fixed frame 3 so as to be movable in the optical axis direction. ing. As shown in the exploded view of FIG. 4, this zoom frame 4 has a diagonal cam groove 4b 1 on its left large diameter portion through which the zooming pin 5a passes.
is provided, and the compensation lens frame 6 is provided below the narrow diameter.
A Z-shaped compensating cam groove 4b2 into which the implanted compensating pin 6A2 is fitted is provided on the inner circumferential surface opposite to the compensating pin 6a1 on the outer circumferential surface of the cam. The iris diaphragm case 7 is fixed to the rear end of the compensation lens frame 6 with a mounting screw 7a, and the lens mount member 8 is fixed to the rear end of the fixed frame 3 with a mounting screw 8a. It is twisted and fixed.

次に、このように構成された本発明のズームレ
ンズ０１の作用を第５〜７図を用いて説明する。
第５図は、上記操作枠２がその周方向の変倍用カ
ム溝２b2により上記変倍用ピン５ａを介して変倍
レンズ枠５を通常撮影領域の最短焦点位置Ｗにお
いたときの上記変倍用ピン５ａと固定枠３上の直
進溝３b1およびズーム枠４上のカム溝４b1との係
合状態を示している。この状態から操作枠２を光
軸方向に図において右方に移動させると、その変
倍用カム溝２b2により上記変倍用ピン５ａは固定
枠上３の光軸方向の直進溝３b1に沿つて移動し、
変倍レンズ枠５を最長焦点位置Ｔに位置させる。
このように上記変倍用ピン５ａを固定枠３の直進
溝３b1に沿つて移動させると、同変倍用ピン５ａ
が嵌入しているカム溝４b1を介してズーム枠４は
周方向に回動する。このとき、同ズーム枠４は、
同ズーム枠４上に植設された係合ピン４ａ（第４
図参照）が固定枠３上の周方向の直進溝３b3に嵌
合していることによつて光軸方向には移動するこ
とはない。上記ズーム枠４が回動すると同ズーム
枠４上の補償用カム溝４b2（第６図参照）に嵌入
する補償用ピン６a2を内周面に植設された上記補
償レンズ枠が同補償用ピン６a2を介して、上記カ
ム溝４b2に沿つて光軸方向に移動する。 Next, the operation of the zoom lens 01 of the present invention configured as described above will be explained using FIGS. 5 to 7.
FIG. 5 shows the above when the operating frame 2 has placed the variable power lens frame 5 at the shortest focus position W in the normal photographing area via the variable power pin 5a using the variable power cam groove 2b2 in the circumferential direction. The state in which the magnification changing pin 5a is engaged with the rectilinear groove 3b1 on the fixed frame 3 and the cam groove 4b1 on the zoom frame 4 is shown. When the operation frame 2 is moved from this state to the right in the figure in the optical axis direction, the magnification changing cam groove 2b2 causes the magnification changing pin 5a to move into the straight groove 3b1 in the optical axis direction on the fixed frame upper part 3. move along,
The variable power lens frame 5 is positioned at the longest focal point T.
When the magnification changing pin 5a is moved along the rectilinear groove 3b1 of the fixed frame 3, the magnification changing pin 5a
The zoom frame 4 rotates in the circumferential direction via the cam groove 4b1 into which the zoom frame 4 is fitted. At this time, the zoom frame 4 is
Engagement pin 4a (fourth pin) implanted on the zoom frame 4
(see figure) is fitted into the circumferential rectilinear groove 3b3 on the fixed frame 3, so that it does not move in the optical axis direction. When the zoom frame 4 rotates, the compensation lens frame, which has a compensation pin 6a 2 implanted on its inner circumferential surface that fits into the compensation cam groove 4b 2 (see Figure 6) on the zoom frame 4, compensates for the rotation of the zoom frame 4. It moves in the optical axis direction along the cam groove 4b 2 via the cam pin 6a 2 .

一方、上記補償レンズ枠６の上記補償用ピン６
a2の反対側外面に植設された補償用ピン６a1が上
記固定枠３上の光軸方向の直進溝３b2（第３図参
照）に嵌入していることによつて、同補償レンズ
枠６の回動は規制されて、光軸方向にのみ移動す
る。 On the other hand, the compensation pin 6 of the compensation lens frame 6
The compensation pin 6a 1 implanted on the outer surface on the opposite side of the compensation lens 6a 1 is fitted into the straight groove 3b 2 (see Fig. 3) on the fixed frame 3 in the optical axis direction. Rotation of the frame 6 is restricted and it moves only in the optical axis direction.

次に、上記操作枠２を操作して、通常撮影領域
から近接（マクロ）撮影領域に切り換える作用に
ついて説明する。この場合には、まず上記第５図
に示すように操作枠２を通常撮影領域の最短焦点
位置Ｗにある状態にし、この状態からマクロ撮影
領域WMに切換える。即ち、Ｗ位置にある操作枠
２を第５図の状態から更に近距離側に回動する。
すると、同操作枠２の変倍用カム溝２b2の下端部
２b2′により上記変倍用ピン５ａを押し上げて上
記固定枠３の周方向のカム溝３b1′に沿つて回動
させる。この変倍用ピン５ａの回動に伴ない、同
ピン５ａとこれに係合するズーム枠４のカム溝４
b1とによりズーム枠４はマクロ回動角だけ回動す
る。ズーム枠４のマクロ回動角分の回動により、
補償レンズ枠６は上記補償用ピン６a2が第６図の
位置から第７図の位置、即ち、WM位置に移動す
ることにより、マクロ位置におけるズームレンズ
０１の補償を行う。そして、この状態から通常撮
影領域戻す場合は、上記操作枠２を遠距離側に回
動させる。すると、同操作枠２の上記傾斜カム２
b3のカム面が第７図のWM位置にある上記補償レ
ンズ枠６の補償用ピンン６a1を左方に押動して、
第６図のＷ位置に移動させる。即ち、極めて簡単
にマクロ撮影領域から通常撮影領域の切り換えが
できる。 Next, the operation of operating the operation frame 2 to switch from the normal shooting area to the close-up (macro) shooting area will be explained. In this case, first, as shown in FIG. 5, the operation frame 2 is brought to a state where it is at the shortest focus position W of the normal photographing area, and from this state, the camera switches to the macro photographing area WM. That is, the operation frame 2 at the W position is rotated further from the state shown in FIG. 5 to the short distance side.
Then, the lower end portion 2b 2 ' of the magnification changing cam groove 2b 2 of the operating frame 2 pushes up the magnification changing pin 5a and rotates it along the circumferential cam groove 3b 1 ' of the fixed frame 3. As the zooming pin 5a rotates, the cam groove 4 of the zoom frame 4 that engages with the pin 5a
b 1 causes the zoom frame 4 to rotate by the macro rotation angle. By rotating the zoom frame 4 by the macro rotation angle,
The compensation lens frame 6 compensates the zoom lens 01 at the macro position by moving the compensation pin 6a2 from the position shown in FIG. 6 to the position shown in FIG. 7, that is, the WM position. When returning to the normal photographing area from this state, the operation frame 2 is rotated to the far side. Then, the inclined cam 2 of the same operation frame 2
Push the compensation pin 6a 1 of the compensation lens frame 6 to the left, where the cam surface of b 3 is at the WM position in FIG.
Move it to the W position in Figure 6. That is, it is possible to switch from the macro photography area to the normal photography area very easily.

第８図は、上記操作枠２の操作による各レンズ
群Ｌ１，Ｌ２，Ｌ３，Ｌ４の動きを示すものであ
る。このように本ズームレンズ０１によれば、通
常撮影領域（Ｗ−Ｔ）からマクロ撮影領域WMへ
の切換および上記全領域（WM−Ｗ−Ｔ）におけ
る合焦調整も操作枠２の操作のみで極めて容易
に、円滑に、しかも精密に行うことができる。 FIG. 8 shows the movement of each lens group L1, L2, L3, and L4 as a result of the operation of the operation frame 2. As shown in FIG. In this way, according to this zoom lens 01, switching from the normal shooting area (W-T) to the macro shooting area WM and adjusting the focus in the above-mentioned entire area (WM-W-T) can be done only by operating the operation frame 2. This can be done extremely easily, smoothly, and precisely.

第９図は、本発明の他の実施例を示すズームレ
ンズの上半部の断面図である。このズームレンズ
０２は上記第１図のズームレンズ０１におけるズ
ーム枠４の役目も補償レンズ枠６が兼ねて行うよ
うにしたものである。従つて、本ズームレンズ０
２には上記ズームレンズ０１におけるズーム枠４
がなく、これを兼ねる補償レンズ枠６の構成およ
びこれに関連する部分が一部変るだけで、他の構
成部材は上記第１図のズームレンズ０１とほぼ同
様に構成されているので、同一構成部材について
は同一符号を付すに止め、その説明は省略する。
特に上記フオーカスレンズ枠１および操作枠２に
ついては全く同様に構成されている。本ズームレ
ンズ０２における固定枠１３も、上記ズームレン
ズ０１におけるものとその形状は全く同様である
が、同枠１３上に設けられたカム溝が全く異つて
いる。即ち、第１１図に示すように、同枠１３の
左下方には上記変倍用ピン５ａが嵌入するＬ字状
の直進溝１３b1が設けられており、右上方には絞
りケース１７の外周面に植設された係合ピン１７
a2が嵌入する光軸方向の直進溝１３b3が設けら
れ、更にその下方には補償レンズ枠６の外周面に
植設された補償用ピン１６ａが嵌入するＳ字状の
補償用カム溝１３b2が設けられている。また、こ
の固定枠１３の外周面には上記第３図におけるス
トツパーピン３a1，３a2に相当するストツパーピ
ン１３a1，１３a2が同様の位置に植設されてい
る。 FIG. 9 is a sectional view of the upper half of a zoom lens showing another embodiment of the present invention. In this zoom lens 02, a compensation lens frame 6 also serves as the zoom frame 4 in the zoom lens 01 shown in FIG. Therefore, this zoom lens 0
2 shows the zoom frame 4 of the zoom lens 01 mentioned above.
The structure of the compensation lens frame 6, which also serves as a compensation lens frame 6, and its related parts are only partially changed, and the other components are almost the same as the zoom lens 01 shown in FIG. The same reference numerals are given to the members, and the explanation thereof will be omitted.
In particular, the focus lens frame 1 and the operation frame 2 are constructed in exactly the same way. The fixed frame 13 in this zoom lens 02 is also completely similar in shape to that in the zoom lens 01 described above, but the cam groove provided on the frame 13 is completely different. That is, as shown in FIG. 11, an L-shaped rectilinear groove 13b1 into which the variable power pin 5a is fitted is provided at the lower left of the frame 13, and an outer circumference of the aperture case 17 is provided at the upper right. Engagement pin 17 planted on the surface
A straight groove 13b 3 in the optical axis direction into which the lens a 2 is fitted is provided, and further below it is an S-shaped compensation cam groove 13b into which the compensation pin 16a implanted on the outer peripheral surface of the compensation lens frame 6 is fitted. 2 are provided. Furthermore, stopper pins 13a 1 and 13a 2 corresponding to the stopper pins 3a 1 and 3a 2 in FIG . 3 are implanted in the same positions on the outer peripheral surface of the fixed frame 13.

本ズームレンズ０２における補償レンズ枠１６
は上記ズームレンズ０１におけるズーム枠４と補
償レンズ枠６とを合体した形状のもので固定枠１
３内に回動自在に嵌装されている。同補償レンズ
枠１６には、第１２図に示すように、ほぼ中央部
に上記ズームレンズ０１のズーム枠４に設けられ
たカム溝４b1とほぼ同様な右斜上方に延びる直線
状カム溝１６b1が設けられており、右下方の外周
面には、上記固定枠１３の補償用カム溝１３b2に
嵌入する補償用ピン１６ａが植設されている。本
ズームレンズ０２の絞りケース１７は、上記補償
レンズ枠１６の後端部に同レンズ枠１６とは回動
自在に光軸方向の移動に一体的になるようにして
嵌装されている。即ち、第１３図に示すように、
補償レンズ枠１６の後端部のレンズ保持部１６ｃ
の周縁には円弧状カム孔１６b2が穿設されてい
て、絞りケース１７の前面周縁には上記カム孔１
６b2を通して有頭ねじからなる係合ピン１７a1が
ねじ止めされている。よつて、絞りケース１７は
補償レンズ枠１６の回動に対してフリーとなつて
いて、同レンズ枠１６の光軸方向の移動に対して
は、絞りケース１７はその外周面上に植設された
係合ピン１７a1が上記固定枠１３上の光軸方向の
直進溝３b3に沿つて上記補償レンズ枠１６と一体
的に移動するようになつている。 Compensation lens frame 16 in this zoom lens 02
is a combination of the zoom frame 4 and the compensation lens frame 6 in the zoom lens 01, and the fixed frame 1
It is rotatably fitted into the inside of 3. As shown in FIG. 12, the compensating lens frame 16 has a linear cam groove 16b extending diagonally upward to the right, which is substantially similar to the cam groove 4b1 provided in the zoom frame 4 of the zoom lens 01, at approximately the center. 1 , and a compensation pin 16a that fits into the compensation cam groove 13b2 of the fixed frame 13 is implanted on the lower right outer peripheral surface. The aperture case 17 of the present zoom lens 02 is fitted to the rear end of the compensation lens frame 16 so as to be rotatable and integral with the lens frame 16 in the direction of the optical axis. That is, as shown in FIG.
Lens holding portion 16c at the rear end of the compensation lens frame 16
An arc-shaped cam hole 16b2 is bored in the periphery of the diaphragm case 17, and the cam hole 16b2 is formed in the front periphery of the aperture case 17.
An engaging pin 17a1 made of a headed screw is screwed through 6b2 . Therefore, the diaphragm case 17 is free from rotation of the compensation lens frame 16, and the diaphragm case 17 is installed on the outer peripheral surface of the lens frame 16 against movement in the optical axis direction. The engaging pin 17a1 moves integrally with the compensating lens frame 16 along the straight groove 3b3 on the fixed frame 13 in the optical axis direction.

次に、このように構成された本ズームレンズ０
２の作用について説明する。操作枠２をその変倍
用カム溝２b2および固定枠１３の直進溝１３b1と
により変倍用ピン５ａを光軸方向に移動させて、
補償レンズ枠１６をそのカム溝１６b1を介して回
動させる作用については、上記第１図のズームレ
ンズ０１におけるズーム枠４と同様にして回動さ
せる作用（第５図参照）と全く同様である。上記
補償レンズ枠１６が変倍用ピン５ａを介して回動
すると、同補償レンズ枠１６は同レンズ枠１６の
補償用ピン１６ａとこれが嵌入する固定枠１３上
のＳ字状の補償用カム溝１３b2（第１１，１２図
参照）との関係を保ちながら、一方上記変倍用ピ
ン５ａと上記直進溝３b1とにより光軸方向の移動
成分を持ちながら回動して、上記第１図のズーム
レンズ０１の場合と同様に合焦調整を行う。ま
た、このズームレンズ０２の場合においても、上
記操作枠２を更に回動して、上記ズームレンズ０
１における場合（第５〜７図参照）と全く同様に
して、通常撮影領域からマクロ撮影領域へ、また
マクロ撮影領域から通常撮影領域への切り換えが
できることは勿論である。 Next, the present zoom lens 0 configured in this way will be explained.
The effect of 2 will be explained. The magnification changing pin 5a is moved in the optical axis direction using the magnification changing cam groove 2b2 of the operation frame 2 and the linear groove 13b1 of the fixed frame 13,
The action of rotating the compensation lens frame 16 via its cam groove 16b1 is exactly the same as the action of rotating the zoom frame 4 in the zoom lens 01 of Fig. 1 above (see Fig. 5). be. When the compensation lens frame 16 rotates via the variable power pin 5a, the compensation lens frame 16 is connected to the compensation pin 16a of the lens frame 16 and the S-shaped compensation cam groove on the fixed frame 13 into which the compensation pin 16a is inserted. 13b 2 (see FIGS. 11 and 12), while rotating with a movement component in the optical axis direction by the magnification changing pin 5a and the straight groove 3b 1 , as shown in FIG. Focus adjustment is performed in the same manner as in the case of the zoom lens 01. Also, in the case of this zoom lens 02, by further rotating the operation frame 2, the zoom lens 0
Of course, it is possible to switch from the normal shooting area to the macro shooting area and from the macro shooting area to the normal shooting area in exactly the same way as in case 1 (see FIGS. 5 to 7).

以上説明したように、本発明によれ、通常撮影
領域のみならず、マクロ撮影領域への切り換え
も、また合焦調整も一操作枠の操作のみで簡単に
行える。よつて、従来の欠点を除去し極めて単純
な構造で、しかも精密に作動するズームレンズを
提供することができる。 As described above, according to the present invention, switching not only to the normal photography area but also to the macro photography area and focus adjustment can be easily performed by operating only one operation frame. Therefore, it is possible to provide a zoom lens that eliminates the drawbacks of the conventional technology, has an extremely simple structure, and operates precisely.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は、本発明の一実施例を示すズームレン
ズの上半部の断面図、第２〜４図は、上記第１図
のズームレンズの操作枠、固定枠、ズーム枠のそ
れぞれの展開図、第５〜７図は、上記第２〜４図
に示す各枠のカム溝の係合態様をそれぞれ示す拡
大平面図、第８図は、上記第１図のズームレンズ
における各レンズ群の動きを示す線図、第９図
は、本発明の他の実施例を示すズームレンズの上
半部の断面図、第１０〜１２図は、上記第９図の
ズームレンズの操作枠、固定枠、補償レンズ枠の
それぞれの展開図、第１３図は、上記第９図のズ
ームレンズの補償レンズ枠のレンズ保持部の断面
図である。 ０１，０２……ズームレンズ、１……フオーカ
スレンズ枠、２……操作枠、２b2……変倍用カム
溝、２b3……傾斜カム、３，１３……固定枠、３
b1，３b2，１３b1……直進溝、４b2，１３b2……
補償用カム溝、５……変倍レンズ枠、５ａ……変
倍用ピン、６，１６……補償レンズ枠、６a1，６
a2，１６ａ……補償用ピン。 FIG. 1 is a cross-sectional view of the upper half of a zoom lens showing an embodiment of the present invention, and FIGS. 2 to 4 are development views of the operation frame, fixed frame, and zoom frame of the zoom lens shown in FIG. 1. Figures 5 to 7 are enlarged plan views showing the manner of engagement of the cam grooves of each frame shown in Figures 2 to 4 above, and Figure 8 is an enlarged plan view of each lens group in the zoom lens shown in Figure 1 above. Diagrams showing movement; FIG. 9 is a sectional view of the upper half of the zoom lens showing another embodiment of the present invention; FIGS. 10 to 12 are operating frames and fixed frames of the zoom lens shown in FIG. 9. , FIG. 13 is a cross-sectional view of the lens holding portion of the compensation lens frame of the zoom lens shown in FIG. 9. 01,02...zoom lens, 1...focus lens frame, 2...operation frame, 2b 2 ...cam groove for variable magnification, 2b 3 ...tilt cam, 3,13...fixed frame, 3
b 1 , 3b 2 , 13b 1 ... Straight groove, 4b 2 , 13b 2 ...
Compensation cam groove, 5... variable power lens frame, 5a... variable power pin, 6, 16... compensation lens frame, 6a 1 , 6
a 2 , 16a... Compensation pin.

Claims (1)

【特許請求の範囲】 １ 光軸方向の進退によりズーミング操作を行
い、光軸周りの回動により通常撮影時の合焦動作
および近接撮影領域への移行を行う操作枠と、 該操作枠上に穿設された光軸周りの変倍用カム
溝および固定枠上に穿設された光軸方向に延びる
直進溝に嵌入する変倍用ピンを有し、上記操作枠
の光軸方向の進退に伴ない光軸方向に進退される
変倍レンズ枠と、 該変倍レンズ枠の進退に連動して光軸周りに回
動する枠に穿設された補償用カム溝と固定枠上に
穿設された光軸方向に延びる直進溝に、もしくは
固定枠上に穿設された補償用カム溝のみに嵌入す
る補償用ピンを有し、上記変倍レンズ枠の光軸方
向への進退に連動して光軸方向に進退する補償レ
ンズ枠と、 を具備し、上記操作枠を短焦点側へ移動させた後
に該操作枠を近距離側へ回動することにより、上
記変倍用ピンおよび補償用ピンを、それぞれ上記
変倍用カム溝および補償用カム溝の近接撮影領域
に移行させ、近接撮影状態とする近接撮影可能な
ズームレンズにおいて、 上記操作枠上に、上記補償用ピンが補償用カム
溝の近接撮影領域内にある場合に常に当接する傾
斜カムを設け、該操作枠の遠距離側への回動によ
り上記傾斜カムのカム面が上記補償用ピンを押動
して、上記補償用カム溝の、通常撮影領域に復帰
させるようにしたことを特徴とする近接撮影可能
なズームレンズ。[Scope of Claims] 1. An operating frame that performs zooming operations by advancing and retreating in the optical axis direction, and performs focusing operations during normal shooting and transition to a close-up shooting area by rotating around the optical axis; It has a magnification changing cam groove drilled around the optical axis and a magnification changing pin that fits into a straight groove extending in the optical axis direction drilled on the fixed frame, and allows the operation frame to move forward and backward in the optical axis direction. A variable power lens frame that moves forward and backward in the direction of the optical axis, a compensating cam groove drilled in the frame that rotates around the optical axis in conjunction with the movement of the variable power lens frame, and a compensation cam groove drilled in the fixed frame. It has a compensation pin that fits only into a linear groove extending in the direction of the optical axis, or a compensation cam groove drilled on the fixed frame, and is linked to the movement of the variable power lens frame in the direction of the optical axis. a compensation lens frame that moves forward and backward in the optical axis direction; and by moving the operation frame to the short focus side and then rotating the operation frame to the short distance side, the zooming pin and the compensation lens frame are moved. In a zoom lens capable of close-up photography in which the pins are moved to the close-up shooting areas of the variable power cam groove and the compensation cam groove, respectively, and the close-up shooting state is established, the compensation pin is placed on the operation frame above the compensation cam groove. A tilted cam is provided that always comes into contact when the groove is in the close-up shooting area, and when the operation frame is rotated toward the far side, the cam surface of the tilted cam pushes the compensation pin, thereby causing the compensation pin to move. A zoom lens capable of close-up photography characterized by a cam groove that returns to the normal photography area.
JP57159229A 1982-09-13 1982-09-13 Zoom lens capable of short distance photography Granted JPS5948718A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57159229A JPS5948718A (en) 1982-09-13 1982-09-13 Zoom lens capable of short distance photography

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57159229A JPS5948718A (en) 1982-09-13 1982-09-13 Zoom lens capable of short distance photography

Publications (2)

Publication Number Publication Date
JPS5948718A JPS5948718A (en) 1984-03-21
JPH03602B2 true JPH03602B2 (en) 1991-01-08

Family

ID=15689155

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57159229A Granted JPS5948718A (en) 1982-09-13 1982-09-13 Zoom lens capable of short distance photography

Country Status (1)

Country Link
JP (1) JPS5948718A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015045230A1 (en) 2013-09-30 2015-04-02 パナソニックＩｐマネジメント株式会社 Lens tube

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5683708A (en) * 1979-12-13 1981-07-08 Canon Inc Zoom lens which permits close-up photography
JPS5685712A (en) * 1979-12-17 1981-07-13 Ricoh Co Ltd Zoom lens provided with close-up photographing mechanism

Also Published As

Publication number Publication date
JPS5948718A (en) 1984-03-21

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