JP3236438B2 - Lens barrel - Google Patents
Lens barrelInfo
- Publication number
- JP3236438B2 JP3236438B2 JP32218593A JP32218593A JP3236438B2 JP 3236438 B2 JP3236438 B2 JP 3236438B2 JP 32218593 A JP32218593 A JP 32218593A JP 32218593 A JP32218593 A JP 32218593A JP 3236438 B2 JP3236438 B2 JP 3236438B2
- Authority
- JP
- Japan
- Prior art keywords
- holding frame
- lens
- lens holding
- frame
- optical axis
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Lens Barrels (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、レンズ鏡筒、より詳し
くは、複数のレンズ群を光軸方向に進退自在に配置した
レンズ鏡筒に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens barrel, and more particularly, to a lens barrel in which a plurality of lens groups are arranged so as to be able to advance and retreat in an optical axis direction.
【０００２】[0002]
【従来の技術】従来より、レンズ群を保持するレンズ保
持枠を、ロッドを用いて互いに支持するように構成され
たズームレンズ鏡筒は、種々のものが提案されていて、
例えば特開平２−２４７６２４号公報などにその一例が
記載されている。2. Description of the Related Art Conventionally, various types of zoom lens barrels configured to support lens holding frames for holding a lens group using rods have been proposed.
For example, one example is described in Japanese Patent Application Laid-Open No. 2-247624.
【０００３】このようなレンズ鏡筒は、例えば図５に示
すように、固定枠２００ａの内径側に、３つのレンズ保
持枠２００ｂ，２００ｃ，２００ｄを光軸前方側から後
方側に向かって順に収納していて、これらの内、光軸前
方側に設けられているレンズ保持枠２００ｂから光軸後
方に向けてロッド２００ｅを延設し、このロッド２００
ｅに軸受２００ｆ，２００ｇを挿通することで、他のレ
ンズ保持枠２００ｃ，２００ｄを光軸方向に移動可能に
支持している。In such a lens barrel, for example, as shown in FIG. 5, three lens holding frames 200b, 200c and 200d are housed in order from the front side to the rear side of the optical axis on the inner side of the fixed frame 200a. The rod 200e extends from the lens holding frame 200b provided on the front side of the optical axis toward the rear side of the optical axis.
The other lens holding frames 200c and 200d are supported so as to be movable in the optical axis direction by inserting the bearings 200f and 200g through e.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上記図
５に示したようなレンズ鏡筒では、図６に示すように、
沈胴状態において、ロッド２００ｅがレンズ鏡筒のスペ
ースから光軸後方側に突出してしまう。また、沈胴状態
でロッドが突出しないようにロッドの長さを短くする
と、保持枠の移動量が小さくなってしまって設計上の制
約が大きくなり、例えば高倍率のズームレンズ鏡筒とす
ることは難しくなる。However, in the lens barrel as shown in FIG. 5, as shown in FIG.
In the retracted state, the rod 200e protrudes from the space of the lens barrel to the rear side of the optical axis. Also, if the length of the rod is shortened so that the rod does not protrude in the collapsed state, the amount of movement of the holding frame is reduced and the design restrictions are increased, and for example, it is difficult to use a high-magnification zoom lens barrel. It becomes difficult.
【０００５】本発明は上記事情に鑑みてなされたもので
あり、レンズ保持枠の移動量が大きく沈胴状態のときの
長さが短いレンズ鏡筒を提供することを目的としてい
る。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a lens barrel having a large moving amount of a lens holding frame and a short length in a collapsed state.
【０００６】[0006]
【課題を解決するための手段及び作用】上記の目的を達
成するために、本発明によるレンズ鏡筒は、 互いに光
軸方向に相対的に変位可能な第１のレンズ保持枠、第２
のレンズ保持枠、第３のレンズ保持枠を有し、上記第２
のレンズ保持枠が上記第１のレンズ保持枠と上記第３の
レンズ保持枠との間に配されたレンズ鏡筒において、上
記第１のレンズ保持枠に設けられ、円周方向の第１の位
置にて上記第２のレンズ保持枠に向けて延出する第１の
ロッド部材と、上記第３のレンズ保持枠に設けられ、上
記第１の位置とは円周方向で異なる第２の位置にて上記
第２のレンズ保持枠に向けて延出する第２のロッド部材
と、上記第２のレンズ保持枠に設けられ、上記第１のロ
ッド部材と嵌合する第１の軸受と、上記第２のレンズ保
持枠に設けられ、上記第２のロッド部材と嵌合する第２
の軸受と、上記第２のレンズ保持枠に設けられ、上記第
１の位置及び第２の位置とは円周方向で異なる第３の位
置にて上記第３のレンズ保持枠に向けて延出し、上記レ
ンズ保持枠を光軸方向にガイドするガイド突起とを具備
したことを特徴とする。また、上記レンズ鏡筒は、上記
第３のレンズ保持枠を挟んで上記第２のレンズ保持枠と
は反対側に配される第４のレンズ保持枠と、上記第４の
レンズ保持枠に設けられ、上記第１、第２、第３の位置
とは円周方向で異なる第４の位置にて上記第２のレンズ
保持枠に向けて延出される第３のロッド部材と、上記第
２のレンズ保持枠に設けられ、上記第３のロッド部材と
嵌合する第３の軸受とを具備したことを特徴とする。SUMMARY OF THE INVENTION In order to achieve the above object, a lens barrel according to the present invention is constructed such that the lens barrels are mutually illuminated.
A first lens holding frame relatively displaceable in the axial direction;
And a third lens holding frame.
Of the first lens holding frame and the third lens holding frame
In the lens barrel disposed between the lens holding frame, the upper
The first lens holding frame is provided on the first lens holding frame and has a first position in a circumferential direction.
The first lens extending toward the second lens holding frame
A rod member , provided on the third lens holding frame,
The second position is different from the first position in the circumferential direction.
A second rod member extending toward the second lens holding frame
And the first lens holder provided on the second lens holding frame.
A first bearing that fits with the pad member, and the second lens holder.
A second rod member provided on the holding frame and fitted with the second rod member;
Provided on the second lens holding frame and the second lens holding frame.
A third position different in the circumferential direction from the first position and the second position
Extend toward the third lens holding frame, and
And a guide projection for guiding the lens holding frame in the optical axis direction.
It is characterized by having done . Further, the lens barrel is
With the second lens holding frame with the third lens holding frame in between
A fourth lens retaining frame that is disposed opposite to, the fourth
The first, second, and third positions provided on the lens holding frame.
The second lens at a fourth position different in the circumferential direction from the second lens
A third rod member extending toward the holding frame, the second
And the third rod member provided on the second lens holding frame.
And a third bearing to be fitted .
【０００７】[0007]
【実施例】実施例を具体的に説明する前に、本発明にお
ける概念を図１，図２に示す例を参照して説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Before concretely describing an embodiment, the concept of the present invention will be described with reference to the examples shown in FIGS.
【０００８】レンズ鏡筒は、固定枠１００ａの内径側
に、例えば３つのレンズ保持枠１００ｂ，１００ｃ，１
００ｄを光軸前方側から後方側に向かって順に収納して
いて、これらの内、光軸前方側に設けられているレンズ
保持枠１００ｂから光軸後方に向けてロッド部材１００
ｅを延設するとともに、光軸後方側に設けられているレ
ンズ保持枠１００ｄから光軸前方に向けてロッド部材１
００ｈを延設し、これらのロッド部材１００ｅ，１００
ｈに軸受１００ｆを挿通することで、レンズ保持枠１０
０ｃが光軸方向に移動可能に支持されている。The lens barrel is provided, for example, with three lens holding frames 100b, 100c, 1 on the inner diameter side of the fixed frame 100a.
00d are stored in order from the front side to the rear side of the optical axis, and among these, a rod member 100b is provided from the lens holding frame 100b provided on the front side of the optical axis toward the rear side of the optical axis.
e, and the rod member 1 extends forward from the lens holding frame 100d provided on the optical axis rear side toward the optical axis.
00h, and these rod members 100e, 100
h through the bearing 100f, the lens holding frame 10
0c is movably supported in the optical axis direction.
【０００９】なお、上記ロッド部材１００ｅ，１００ｈ
は、円周方向の略等分位置に配置されている。The rod members 100e, 100h
Are arranged at substantially equal positions in the circumferential direction.
【００１０】このような構成により、レンズ鏡筒が沈胴
状態にあるときでも、図２に示すように、レンズ保持枠
に設けられたロッド部材がレンズ鏡筒のスペースから突
出することはなく、レンズ保持枠の移動量が大きく沈胴
状態のときの長さが短いレンズ鏡筒とすることができ
る。With this configuration, even when the lens barrel is in the collapsed state, the rod member provided on the lens holding frame does not project from the space of the lens barrel as shown in FIG. A lens barrel having a large moving amount of the holding frame and a short length in the collapsed state can be provided.
【００１１】以下、図面を参照して本発明の実施例をよ
り具体的に説明する。図３は本実施例のズームレンズ鏡
筒を光軸方向に引き伸ばして示した分解斜視図、図４は
レンズ保持枠の要部の詳細を示す分解斜視図である。Hereinafter, embodiments of the present invention will be described more specifically with reference to the drawings. FIG. 3 is an exploded perspective view showing the zoom lens barrel of the present embodiment extended in the optical axis direction, and FIG. 4 is an exploded perspective view showing details of a main part of the lens holding frame.
【００１２】ズームレンズ鏡筒は、光軸に沿って前方側
（被写体側）から順に、１群レンズを保持している１群
枠３８、２群レンズを保持している第１のレンズ保持枠
たる２群枠１、３群レンズを保持している第２のレンズ
保持枠たる３群枠５、４群レンズを保持している第３の
レンズ保持枠たる４群枠１３、５群レンズを保持してい
る第４のレンズ保持枠たる５群枠１９を有している。The zoom lens barrel includes, in order from the front side (subject side) along the optical axis, a first group frame 38 holding the first group lens and a first lens holding frame holding the second group lens.
A second lens that holds the barrel 2 group frame 1,3 lens
A third frame holding a third group frame 5 and a fourth group lens as a holding frame
It has a fourth group frame 13, which is a lens holding frame, and a fifth group frame 19, which is a fourth lens holding frame that holds the fifth lens group.
【００１３】上記２群枠１，３群枠５，４群枠１３，５
群枠１９の外周側にはカム枠２４が配置され、このカム
枠２４の外側には上記１群枠３８をねじ部３９を介して
螺合している第１ズーム枠３１が配置され、さらにこの
第１ズーム枠３１の外周側には固定枠３４が配置されて
いて、この固定枠３４は上記レンズ板４６に固定して取
り付けられている。The second group frame 1, the third group frame 5, the fourth group frame 13, 5
A cam frame 24 is arranged on the outer peripheral side of the group frame 19, and a first zoom frame 31 in which the first group frame 38 is screwed via a screw portion 39 is arranged outside the cam frame 24. A fixed frame 34 is arranged on the outer peripheral side of the first zoom frame 31, and the fixed frame 34 is fixedly attached to the lens plate 46.
【００１４】上記２群枠１は、光軸後方側（カメラ本体
側）の端面から周方向の所定範囲に設けられた周壁状の
突起部１ｃを光軸方向に延設し、この突起部１ｃには回
転止めのためのキー溝１ｂを外周面側に、キー溝１ｄを
内周面側に光軸に平行にそれぞれ刻設し、さらにロッド
２を光軸方向に延出している。該２群枠１は、その周面
の周方向の３等分位置に、外方に向かって３本のピン３
を一体に突設するとともに、このピン３に対して光軸方
向前方側（被写体側）で周方向の等分位置に突起部３０
を３つ設けている。The second group frame 1 is provided with a peripheral wall-shaped projection 1c provided in a predetermined range in the circumferential direction from an end face on the rear side of the optical axis (camera body side) in the optical axis direction. In FIG. 2, a key groove 1b for stopping rotation is provided on the outer peripheral surface side, and a key groove 1d is provided on the inner peripheral surface side in parallel with the optical axis, and the rod 2 extends in the optical axis direction. The second group frame 1 is provided with three pins 3 extending outward at three equally spaced positions on the circumferential surface of the second group frame 1.
And a projection 30 is provided at an equal position in the circumferential direction on the front side (subject side) in the optical axis direction with respect to the pin 3.
Are provided.
【００１５】上記３群枠５は、両端にスリーブ６を有す
る略円筒形状の軸受７，８，９を周方向の略３等分位置
にそれぞれ配設し、これらの内の軸受８には軸方向後方
側（カメラ本体側）に突出する突起部２３を設け、この
突起部２３に外径方向に突設したピン１２を一体的に設
けている。さらにこの３群枠５には、周方向に沿って上
記軸受７と軸受８の間になる位置に、光軸方向後方側に
延出するガイド突起１０を設け、上記軸受８と軸受９の
間になる位置に光軸軸後方側に延出するガイド突起１１
を設けている。The third group frame 5 is provided with substantially cylindrical bearings 7, 8, and 9 having sleeves 6 at both ends at approximately three equally spaced positions in the circumferential direction. A projection 23 projecting rearward in the direction (camera body side) is provided, and the pin 12 projecting in the outer diameter direction is integrally provided on the projection 23. Further, the third group frame 5 is provided with a guide projection 10 extending rearward in the optical axis direction at a position between the bearing 7 and the bearing 8 along the circumferential direction. Guide projection 11 extending rearward of the optical axis at a position where
Is provided.
【００１６】上記４群枠１３は、その周面から外径方向
にピン１５を一体的に突設するとともに、同周面には回
転止めのための溝部１６を刻設していて、さらに光軸に
平行に前方側に向かうロッド１４を接着していて、これ
ら溝部１６とロッド１４は周方向の略等分位置に配設さ
れている。また、この４群枠１３には、絞りを調整する
ためのモータ１７が取り付けられており、このモータ１
７からは帯状のフレキシブルプリント基板１８が延出し
ている。The fourth group frame 13 has a pin 15 integrally protruded from its peripheral surface in the outer radial direction, and a groove 16 for stopping rotation is formed on the peripheral surface. A rod 14 heading forward in parallel with the axis is bonded, and the groove 16 and the rod 14 are disposed at substantially equal positions in the circumferential direction. A motor 17 for adjusting the aperture is attached to the fourth group frame 13.
A belt-shaped flexible printed circuit board 18 extends from 7.
【００１７】上記５群枠１９は、ピン２２を外径方向に
一体的に突出するとともに、回転止めのための溝部２０
が設けられていて、さらに光軸に平行に前方に向かうロ
ッド２１が接着され、これら溝部２０とロッド２１は周
方向の略等分位置に配設されている。The fifth group frame 19 has a pin 22 integrally projecting in the outer diameter direction and a groove 20 for stopping rotation.
And a rod 21 that is directed forward in parallel with the optical axis is adhered, and the groove 20 and the rod 21 are disposed at substantially equal positions in the circumferential direction.
【００１８】なお、上記各ロッド２，１４，２１は、そ
れぞれの径を同一にしておくと、これらに対応する軸受
けの径もそろえることができるために、製造原価を抑制
することができてよい。If the diameters of the rods 2, 14, and 21 are the same, the diameters of the bearings corresponding to the rods can be made uniform, so that the manufacturing cost may be reduced. .
【００１９】上記カム枠２４は、その内周面にカム機構
を構成する数本の有底カム２６が刻設された円筒状部材
であり、同内周面の光軸後方側（撮影者側）の端部には
周方向に部分的な内歯ギヤー２９が設けられている。ま
た、カム枠２４の外周面には、やはりカム機構を構成す
る数本の有底カム２５が刻設されるとともに、エンコー
ダ２８が貼設され、光軸後方側の端部から周方向の略等
分位置に３本のピン２７を一体的に突設している。The cam frame 24 is a cylindrical member having several bottomed cams 26 constituting a cam mechanism engraved on the inner peripheral surface thereof. An inner gear 29 is provided partially at the end in the circumferential direction. Further, the outer peripheral surface of the cam frame 24, again with a bottom cam 25 of several constituting the cam mechanism is engraved, the encoder 28 is affixed, substantially from the end of the optical axis rearward circumferential direction of the etc
Three pins 27 are integrally protruded at the minute position .
【００２０】上記第１ズーム枠３１は、その内周面に３
本の直進溝３３を周方向の３等分位置にそれぞれ刻設
し、同内周面からはピン５０，５１，５２を一体に突設
するとともに、後方側の端部からは略矩形状の突起部４
９を軸方向に延出していて、この突起部４９には該第１
ズーム枠３１と別体でピン３２が設けられている。The first zoom frame 31 has 3
The rectilinear grooves 33 are engraved at three equal positions in the circumferential direction, and pins 50, 51, and 52 are integrally protruded from the inner peripheral surface, and a substantially rectangular shape is formed from the rear end. Projection 4
9 extends in the axial direction, and the projection 49 has the first
A pin 32 is provided separately from the zoom frame 31.
【００２１】上記固定枠３４は、内周面にカム１１２を
有する円筒状部材であり、光軸方向の前方側の端部にリ
ング３６を嵌合し、外周にはフォトリフレクタ（ＰＲ）
４８を有するフレキシブルプリント基板３５が貼設され
ている。さらに、該固定枠３４の光軸方向の後端面から
は、周方向に沿って数本のボス３７が突設されている。The fixed frame 34 is a cylindrical member having a cam 112 on an inner peripheral surface, a ring 36 is fitted on the front end in the optical axis direction, and a photo reflector (PR) is disposed on the outer periphery.
A flexible printed board 35 having 48 is attached. Further, several bosses 37 project from the rear end surface of the fixed frame 34 in the optical axis direction along the circumferential direction.
【００２２】また、上記１群枠３８は、その光軸前方側
の周面に、第１ズーム枠３１へ取り付けるためのねじ部
３９が刻設されている。The first group frame 38 is provided with a screw portion 39 for attaching the first group frame 38 to the first zoom frame 31 on the peripheral surface on the optical axis front side.
【００２３】上記レンズ板４６は、４隅に孔４７を穿設
した板状部材でなり、光軸に垂直な方向の細い遮光溝４
１が多数刻設されたキー４０と、光軸方向に延びたピニ
オンギヤー４３が取り付けられているキー４２とが、該
レンズ板４６の前方側の面に対して垂直になるように取
り付けられている。また、上記レンズ板４６には、駆動
源たるズームモータ４５と、このズームモータ４５の駆
動力を伝達するためのギヤー列を有する第２ギヤーボッ
クス４４が取り付けられており、このギヤー列の最終ギ
ヤーは、上記キー４２に取り付けられているピニオンギ
ヤー４３と噛合している。The lens plate 46 is a plate-like member having holes 47 formed at four corners, and has a thin light-shielding groove 4 in a direction perpendicular to the optical axis.
A key 40 on which a large number 1 is engraved and a key 42 on which a pinion gear 43 extending in the optical axis direction are mounted are mounted so as to be perpendicular to the front surface of the lens plate 46. I have. The lens plate 46 is provided with a zoom motor 45 as a driving source and a second gear box 44 having a gear train for transmitting the driving force of the zoom motor 45. The last gear of the gear train is mounted. Are engaged with a pinion gear 43 attached to the key 42.
【００２４】次に、上記各レンズ保持枠の支持方法につ
いて説明する。上記３群枠５は、軸受８に２群枠１のロ
ッド２が嵌合し、軸受７に４群枠１３のロッド１４が嵌
合し、軸受９に５群枠１９のロッド２１が嵌合してい
て、すなわち、軸受７，８，９を有するこの３群枠を基
準として、光軸前方側に２群枠、光軸後方側に４群枠，
５群枠がそれぞれ支持されている。Next, a method of supporting each of the lens holding frames will be described. In the third group frame 5, the rod 2 of the second group frame 1 is fitted to the bearing 8, the rod 14 of the fourth group frame 13 is fitted to the bearing 7, and the rod 21 of the fifth group frame 19 is fitted to the bearing 9. That is, based on the three-group frame having the bearings 7, 8, and 9, the second-group frame is provided on the front side of the optical axis, and the fourth-group frame is provided on the rear side of the optical axis.
Five group frames are supported respectively.
【００２５】また、３群枠５に設けられたガイド突起１
１の基端部１１ａが、２群枠１に設けられた溝部１ｄと
嵌合することで２群枠１の回転止めが行われ、ガイド突
起１１が４群枠１３に設けられた溝部１６と嵌合するこ
とで４群枠１３の回転止めが行われ、さらに、ガイド突
起１０と５群枠１９に設けられた溝部２０が嵌合するこ
とで５群枠１９の回転止めが行われている。このように
して、各レンズ保持枠の支持を行っている。The guide projection 1 provided on the third group frame 5
The rotation of the second group frame 1 is stopped by fitting the base end portion 11 a of the first group 11 into the groove portion 1 d provided in the second group frame 1. The rotation of the fourth group frame 13 is stopped by fitting, and the rotation of the fifth group frame 19 is stopped by fitting the guide projections 10 and the groove portions 20 provided on the fifth group frame 19. . Thus, each lens holding frame is supported.
【００２６】上述のような構成によって、沈胴状態での
レンズ鏡筒の長さは、２群枠１，３群枠５，４群枠１
３，５群枠１９のそれぞれの軸方向長さの合計とほぼ等
しくすることができて、極めて光軸方向の長さを短くす
ることができる。With the above configuration, the length of the lens barrel in the collapsed state is as follows: the second group frame 1, the third group frame 5, the fourth group frame 1
The total length of the third and fifth group frames 19 in the axial direction can be substantially equalized, and the length in the optical axis direction can be extremely reduced.
【００２７】以上詳述したように、このような実施例に
よれば、ズームレンズ鏡筒はレンズ群を保持するレンズ
保持枠の支持方法について、ロッド支持の基準となるレ
ンズ保持枠に軸受を設け、他のレンズ保持枠にロッドを
設け、ロッドの配置を円周方向の略等分位置とするため
に、小スペースに効率よくロッド支持が行える。その結
果、ズームレンズ鏡筒の沈胴状態での長さを短くするこ
とができる。As described above in detail, according to such an embodiment, the zoom lens barrel is provided with a bearing on the lens holding frame which is a reference for rod support with respect to the method of supporting the lens holding frame for holding the lens group. In addition, since the rod is provided on another lens holding frame and the rod is disposed at substantially equal positions in the circumferential direction, the rod can be efficiently supported in a small space. As a result, the length of the zoom lens barrel in the collapsed state can be reduced.
【００２８】[0028]
【発明の効果】以上説明したように本発明によれば、レ
ンズ保持枠の移動量が大きく沈胴状態のときの長さが短
いレンズ鏡筒とすることができる。As described above, according to the present invention, a lens barrel having a large moving amount of the lens holding frame and a short length in the collapsed state can be obtained.
【図１】本発明の概念を示す、レンズ鏡筒が繰り出して
いる状態における光軸に沿った縦断面図。FIG. 1 is a longitudinal sectional view along an optical axis in a state where a lens barrel is extended, showing the concept of the present invention.
【図２】上記図１のレンズ鏡筒が沈胴している状態を示
す光軸に沿った縦断面図。FIG. 2 is a longitudinal sectional view along an optical axis showing a state where the lens barrel of FIG. 1 is retracted.
【図３】上記実施例のズームレンズ鏡筒を、光軸方向に
引き伸ばして示した分解斜視図。FIG. 3 is an exploded perspective view showing the zoom lens barrel of the above-described embodiment extended in the optical axis direction.
【図４】上記実施例の２群枠，３群枠，４群枠，５群枠
を光軸方向に引き伸ばして示した分解斜視図。FIG. 4 is an exploded perspective view showing the second, third, fourth, and fifth group frames of the above embodiment extended in the optical axis direction.
【図５】従来のレンズ鏡筒が繰り出している状態を示す
光軸に沿った縦断面図。FIG. 5 is a longitudinal sectional view along an optical axis showing a state where a conventional lens barrel is extended.
【図６】従来のレンズ鏡筒が沈胴している状態を示す光
軸に沿った縦断面図。FIG. 6 is a longitudinal sectional view along an optical axis showing a state where a conventional lens barrel is collapsed.
１…２群枠（レンズ保持枠、第１のレンズ保持枠） ２，１４，２１…ロッド（ロッド部材） ７，８，９…軸受 ５…３群枠（レンズ保持枠、第２のレンズ保持枠） １３…４群枠（レンズ保持枠、第３のレンズ保持枠） １９…５群枠（レンズ保持枠、第４のレンズ保持枠） ３８…１群枠（レンズ保持枠） ２４…カム枠 ３１…第１ズーム枠 ３４…固定枠 ４６…レンズ板DESCRIPTION OF SYMBOLS 1 ... 2nd group frame (lens holding frame , 1st lens holding frame ) 2, 14, 21 ... Rod (rod member) 7, 8, 9 ... Bearing 5 ... 3rd group frame (lens holding frame , 2nd lens holding) frame) 13 ... 4 group frame (lens holding frame, the third lens holding frame) 19 ... 5 group frame (lens holding frame, the fourth lens retaining frame) 38 ... first group frame (lens holding frame) 24 ... cam frame 31: first zoom frame 34: fixed frame 46: lens plate
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平２−213813（ＪＰ，Ａ) 実開 昭61−121412（ＪＰ，Ｕ) 実開 平２−111971（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) G02B 7/02 - 7/105 G02B 7/12 - 7/16 G03B 17/04 - 17/17 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-213813 (JP, A) JP-A-61-121412 (JP, U) JP-A-2-111971 (JP, U) (58) Investigation Field (Int.Cl. 7 , DB name) G02B 7/ 02-7/105 G02B 7 /12-7/16 G03B 17/04-17/17
Claims (2)
１のレンズ保持枠、第２のレンズ保持枠、第３のレンズ
保持枠を有し、上記第２のレンズ保持枠が上記第１のレ
ンズ保持枠と上記第３のレンズ保持枠との間に配された
レンズ鏡筒において、上記第１のレンズ保持枠に設けられ、円周方向の第１の
位置にて上記第２のレンズ保持枠に向けて延出する第１
のロッド部材と 、上記第３のレンズ保持枠に設けられ、上記第１の位置と
は円周方向で異なる第２の位置にて上記第２のレンズ保
持枠に向けて延出する第２のロッド部材と 、上記第２のレンズ保持枠に設けられ、上記第１のロッド
部材と嵌合する第１の軸受と 、上記第２のレンズ保持枠に設けられ、上記第２のロッド
部材と嵌合する第２の軸受と 、上記第２のレンズ保持枠に設けられ、上記第１の位置及
び第２の位置とは円周方向で異なる第３の位置にて上記
第３のレンズ保持枠に向けて延出し、上記レンズ保持枠
を光軸方向にガイドするガイド突起と 、 を具備したことを特徴とするレンズ鏡筒。A first displaceable relative to each other in an optical axis direction;
1 lens holding frame, 2nd lens holding frame, 3rd lens
A holding frame, wherein the second lens holding frame is provided with the first lens.
In the lens barrel disposed between the lens holding frame and the third lens holding frame, the lens barrel is provided on the first lens holding frame, and is provided in a first circumferential direction.
A first extending at the position toward the second lens holding frame;
And the third lens holding frame, and the first position
At the second position different in the circumferential direction.
A second rod member extending toward the holding frame, and the first rod provided on the second lens holding frame;
A first bearing fitted to the member and the second rod provided on the second lens holding frame;
A second bearing fitted to the member, the second bearing provided on the second lens holding frame;
And at a third position circumferentially different from the second position.
The lens holding frame extends toward the third lens holding frame.
And a guide projection for guiding the lens in the optical axis direction .
２のレンズ保持枠とは反対側に配される第４のレンズ保
持枠と、上記第４のレンズ保持枠に設けられ、上記第１、第２、
第３の位置とは円周方向で異なる第４の位置にて上記第
２のレンズ保持枠に向けて延出される第３のロッド部材
と 、上記第２のレンズ保持枠に設けられ、上記第３のロッド
部材と嵌合する第３の軸受と 、 を具備したことを特徴とする請求項１に記載のレンズ鏡
筒。2. The method according to claim 1, wherein the third lens holding frame is interposed therebetween.
A fourth lens holder disposed on the side opposite to the second lens holding frame.
A holding frame and the fourth lens holding frame, wherein the first, second,
The fourth position is different from the third position in the circumferential direction at the fourth position.
A third rod member extending toward the second lens holding frame
And the third rod provided on the second lens holding frame.
The lens barrel according to claim 1, further comprising: a third bearing fitted to the member .
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32218593A JP3236438B2 (en) | 1993-12-21 | 1993-12-21 | Lens barrel |
| US08/359,415 US5818647A (en) | 1993-12-21 | 1994-12-20 | Lens barrel |
| US08/853,830 US5995302A (en) | 1993-12-21 | 1997-05-09 | Lens barrel |
| US09/060,394 US6072643A (en) | 1993-12-21 | 1998-04-15 | Lens barrel |
| US09/185,679 US6081391A (en) | 1993-12-21 | 1998-11-04 | Lens barrel |
| US10/008,627 USRE38308E1 (en) | 1993-12-21 | 2001-11-08 | Lens barrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32218593A JP3236438B2 (en) | 1993-12-21 | 1993-12-21 | Lens barrel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07174956A JPH07174956A (en) | 1995-07-14 |
| JP3236438B2 true JP3236438B2 (en) | 2001-12-10 |
Family
ID=18140898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32218593A Expired - Fee Related JP3236438B2 (en) | 1993-12-21 | 1993-12-21 | Lens barrel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3236438B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6069745A (en) * | 1998-02-04 | 2000-05-30 | Olympus Optical Co., Ltd. | Lens barrell |
| JP3415540B2 (en) | 1999-02-19 | 2003-06-09 | オリンパス光学工業株式会社 | Zoom lens barrel |
| JP2001183567A (en) * | 1999-12-24 | 2001-07-06 | Olympus Optical Co Ltd | Lens barrel device |
| JP2008102427A (en) * | 2006-10-20 | 2008-05-01 | Tamron Co Ltd | Optical apparatus and imaging apparatus |
| JP5950191B2 (en) * | 2011-08-24 | 2016-07-13 | パナソニックＩｐマネジメント株式会社 | Lens barrel |
| WO2014188687A1 (en) * | 2013-05-21 | 2014-11-27 | パナソニックＩｐマネジメント株式会社 | Lens barrel |
-
1993
- 1993-12-21 JP JP32218593A patent/JP3236438B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07174956A (en) | 1995-07-14 |
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