JP3445378B2 - Zoom lens barrel - Google Patents
Zoom lens barrelInfo
- Publication number
- JP3445378B2 JP3445378B2 JP24071394A JP24071394A JP3445378B2 JP 3445378 B2 JP3445378 B2 JP 3445378B2 JP 24071394 A JP24071394 A JP 24071394A JP 24071394 A JP24071394 A JP 24071394A JP 3445378 B2 JP3445378 B2 JP 3445378B2
- Authority
- JP
- Japan
- Prior art keywords
- zoom
- gear
- ring
- drive
- drive ring
- 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、ズーミング動作を手動
或は電動で切り換えて行なえるズーム鏡胴に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a zoom lens barrel capable of manually or electrically switching a zooming operation.
【０００２】[0002]
【従来の技術】ズーミング動作を手動或は電動で切り換
えて行なえるようにしたズーム鏡胴は、一般に、固定筒
上で回転可能に支持されたズーム駆動環と、前記ズーム
駆動環の回転に連動して少なくとも一枚のレンズを光軸
方向に移動させズーム倍率を変化させるレンズ移動機構
と、前記ズーム駆動環を回転させるズーム駆動環駆動用
ギアと、前記ズーム駆動環の外側で回転可能且つ光軸方
向に移動可能に配設されたズーム操作環と、前記ズーム
駆動環とズーム操作環との間の環状空間に配設され、モ
ータの動力を前記ズーム駆動環駆動用ギアに伝達する電
動ズームギア機構とを備える。そして、前記ズーム操作
環を光軸方向の一方の側にスライドした状態で、前記ズ
ーム駆動環駆動用ギアと前記電動ズームギア機構とを連
結する連結機構が設けられ、また、前記ズーム操作環を
光軸方向の他方の側にスライドした状態で、ズーム操作
環とズーム駆動環を直結させるズームレバー等が設けら
れている。そして、前記ズーム操作環を光軸方向の他方
の側にスライドさせた状態でズーム操作環を回転操作す
ると、これと一体にズーム駆動環が回転し、前レンズ及
び後レンズが光軸方向に移動され、手動ズーム動作がな
されるように構成されている。2. Description of the Related Art Generally, a zoom lens barrel capable of manually or electrically switching a zooming operation generally has a zoom driving ring rotatably supported on a fixed barrel and a rotation of the zoom driving ring. A lens moving mechanism that moves at least one lens in the optical axis direction to change the zoom magnification, a zoom drive ring driving gear that rotates the zoom driving ring, and a lens that is rotatable outside the zoom driving ring. An electric zoom gear, which is arranged in an annular space between the zoom operating ring and the zoom operating ring so as to be movable in the axial direction, and transmits the power of the motor to the zoom driving ring driving gear. And a mechanism. A connecting mechanism is provided for connecting the zoom driving ring driving gear and the electric zoom gear mechanism in a state where the zoom operating ring is slid to one side in the optical axis direction. A zoom lever or the like is provided that directly connects the zoom operation ring and the zoom drive ring in a state of sliding to the other side in the axial direction. When the zoom operation ring is rotated while the zoom operation ring is slid to the other side in the optical axis direction, the zoom drive ring rotates integrally with the zoom operation ring, and the front lens and the rear lens move in the optical axis direction. And a manual zoom operation is performed.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、このよ
うな従来の構造では、手動ズーム時、ズーム操作環とズ
ーム駆動環とがズームレバーにより直結されるため、ズ
ーム操作環の回転操作時、ズーム操作環と共にズームレ
バーが該ズーム操作環と一体に回転移動する。そのた
め、前記ズーム駆動環とズーム操作環との間の環状空間
に、前記ズームレバーが回転移動する範囲の空間を確保
しなければならず、電動ズームギア機構を構成する電装
品や、モータ、ギア等の配設スペースが制限される不具
合があった。また、手動ズームから電動ズームに切り換
える際、ズーム駆動環とズーム操作環との間のズームレ
バーによる直結状態を解除する解除機構を要するが、こ
の解除機構は構造が複雑化し、組付も面倒になる不具合
があった。本発明は前記事情に鑑み案出されたものであ
って、本発明の目的は、簡単な構造により手動ズームか
ら電動ズームへの切り換え及び電動ズームから手動ズー
ムへの切り換えを確実に行え、しかも、ズーム駆動環と
ズーム操作環との間の環状空間に大きなスペースを確保
することなく配設でき、カメラのコンパクト化を図れる
ズーム鏡胴を提供することにある。However, in such a conventional structure, since the zoom operation ring and the zoom drive ring are directly connected by the zoom lever at the time of manual zooming, the zoom operation ring is rotated at the time of zoom operation. The zoom lever rotates together with the ring together with the zoom operation ring. Therefore, it is necessary to secure a space within a range in which the zoom lever is rotationally moved in an annular space between the zoom drive ring and the zoom operation ring, and an electric component, a motor, a gear, etc. that constitute the electric zoom gear mechanism. There was a problem that the installation space of was limited. Also, when switching from manual zoom to electric zoom, a release mechanism is required to release the direct connection between the zoom drive ring and the zoom operation ring by the zoom lever, but this release mechanism has a complicated structure and is troublesome to assemble. There was a problem. The present invention has been devised in view of the above circumstances, and an object of the present invention is to reliably switch from manual zoom to electric zoom and to switch from electric zoom to manual zoom with a simple structure. An object of the present invention is to provide a zoom lens barrel that can be arranged without securing a large space in an annular space between the zoom drive ring and the zoom operation ring, and can make the camera compact.
【０００４】[0004]
【課題を解決するための手段】前記目的を達成するため
本発明は、固定筒上で回転可能に支持されたズーム駆動
環と、前記ズーム駆動環の回転に連動して少なくとも一
枚のレンズを光軸方向に移動させズーム倍率を変化させ
るレンズ移動機構と、前記ズーム駆動環を回転させるズ
ーム駆動環駆動用ギアと、前記ズーム駆動環の外側で回
転可能且つ光軸方向に移動可能に配設されたズーム操作
環と、モータの動力を前記ズーム駆動環駆動用ギアに伝
達する電動ズームギア機構と、前記ズーム操作環の内周
部に形成された歯部に噛合するギアを有し、前記ズーム
操作環の回転力を前記ズーム駆動環駆動用ギアに伝達す
る手動ズームギア機構と、前記ズーム操作環が光軸方向
の一方の側にスライドした状態で、前記ズーム駆動環駆
動用ギアと前記電動ズームギア機構とを連結すると共
に、前記手動ズームギア機構とズーム駆動環駆動用ギア
との連結を解除し、ズーム操作環が光軸方向の他方の側
にスライドした状態で、前記ズーム駆動環駆動用ギアと
前記電動ズームギア機構との連結を解除すると共に、前
記手動ズームギア機構と前記ズーム駆動環駆動用ギアと
を連結するギア切り換え機構とを備え、前記ズーム駆動
環とズーム操作環との間に環状空間が形成され、前記環
状空間には、該環状空間の周方向に延在する前軸受板と
後軸受板とが前記光軸方向に間隔をおいて配設され、前
記電動ズームギア機構と手動ズームギア機構とギア切り
換え機構は、前記環状空間内で前記前軸受板と後軸受板
の間に配設されていることを特徴とする。In order to achieve the above object, the present invention comprises a zoom drive ring rotatably supported on a fixed barrel, and at least one lens linked to the rotation of the zoom drive ring. A lens moving mechanism that moves in the optical axis direction to change the zoom magnification, a zoom driving ring driving gear that rotates the zoom driving ring, and a lens that is rotatable outside the zoom driving ring and movable in the optical axis direction. has a zoom operation ring that is an electric zoom gear mechanism for transmitting the power of the motors to the zoom drive ring driven gear, a gear that meshes with the teeth formed on the inner peripheral portion of the zoom operation ring, a manual zoom gear mechanism for transmitting the rotational force of the zoom operation ring to the zoom drive ring driving gear, with the front Symbol zooming operation ring is slid to one side of the optical axis direction, and the zoom driving ring driving gear The electricity The zoom drive ring drive gear is connected to the zoom gear mechanism, the manual zoom gear mechanism is disconnected from the zoom drive ring drive gear, and the zoom operation ring is slid to the other side in the optical axis direction. And the electric zoom gear mechanism is released, and a gear switching mechanism that connects the manual zoom gear mechanism and the zoom drive ring drive gear is provided, and the zoom drive mechanism is provided.
An annular space is formed between the ring and the zoom operation ring.
The annular space has a front bearing plate extending in the circumferential direction of the annular space.
The rear bearing plate and the front bearing plate are spaced apart from each other in the optical axis direction.
Electric zoom gear mechanism and manual zoom gear mechanism and gear cutting
The replacement mechanism includes the front bearing plate and the rear bearing plate in the annular space.
It is characterized in that it is arranged between .
【０００５】また、本発明は、ズーム駆動環駆動用ギア
がズーム駆動環駆動用軸に設けられ、前記手動ズームギ
ア機構は、このズーム駆動環駆動用軸に該ズーム駆動環
駆動用軸と一体に回転可能に配設され前記ズーム操作環
の内周部の歯部と噛合するギアに噛合可能な第１ギアを
備えることを特徴とする。また、本発明は、ズーム駆動
環駆動用ギアがズーム駆動環駆動用軸に設けられ、前記
ギア切り換え機構は、このズーム駆動環駆動用軸に軸方
向に移動可能且つズーム駆動環駆動用軸と一体に回転可
能に配設され、前記電動ズームギア機構に連結可能な第
２ギアを備えることを特徴とする。また、本発明は、ズ
ーム駆動環駆動用ギアがズーム駆動環駆動用軸に設けら
れ、前記手動ズームギア機構は、このズーム駆動環駆動
用軸に該ズーム駆動環駆動用軸と一体に回転可能に配設
され前記ズーム操作環の内周部の歯部と噛合するギアに
噛合可能な第１ギアを備え、前記ギア切り換え機構は、
前記ズーム駆動環駆動用軸に軸方向に移動可能且つズー
ム駆動環駆動用軸と一体に回転可能に配設され、前記電
動ズームギア機構に連結可能な第２ギアを備え、更に、
前記ギア切り換え機構は、前記ズーム操作環の内周部の
歯部と噛合するギアと前記第２ギアをズーム操作環の光
軸方向へのスライドに連動させて軸方向へ移動させるズ
ームレバーを備えることを特徴とする。According to the present invention, a zoom driving ring driving gear is provided on the zoom driving ring driving shaft, and the manual zoom gear mechanism is integrated with the zoom driving ring driving shaft on the zoom driving ring driving shaft. It is characterized in that it is provided with a first gear which is rotatably arranged and which is capable of meshing with a gear which meshes with a tooth portion of an inner peripheral portion of the zoom operation ring. Further, in the present invention, a zoom drive ring drive gear is provided on the zoom drive ring drive shaft, and the gear switching mechanism is axially movable to the zoom drive ring drive shaft and A second gear, which is integrally rotatably disposed and is connectable to the electric zoom gear mechanism, is provided. Further, according to the present invention, a zoom drive ring drive gear is provided on the zoom drive ring drive shaft, and the manual zoom gear mechanism is rotatable integrally with the zoom drive ring drive shaft on the zoom drive ring drive shaft. A gear that is meshable with a gear that is arranged and meshes with a tooth portion of an inner peripheral portion of the zoom operation ring;
A second gear that is disposed on the zoom drive ring drive shaft so as to be movable in the axial direction and rotatable integrally with the zoom drive ring drive shaft, and that is connectable to the electric zoom gear mechanism;
The gear switching mechanism includes a gear that meshes with a tooth portion of an inner peripheral portion of the zoom operation ring and a zoom lever that moves the second gear in the axial direction in association with sliding of the zoom operation ring in the optical axis direction. It is characterized by
【０００６】[0006]
【実施例】以下、本発明の実施例を添付図面に従って説
明する。図１は実施例に係るズーム鏡胴の半部断面側面
図、図２は電動ズーム時における電動ズームギア機構、
手動ズームギア機構、ギア切り換え機構の展開図、図３
は、手動ズーム時における手動ズームギア機構、ギア切
り換え機構の展開図、図４は実施例に係るズーム鏡胴の
要部の正面図を示す。図１において、１はズーム鏡胴、
３はその光軸、５，７はズームレンズを構成する前レン
ズ群と後レンズ群を示し、前レンズ群５は前移動枠９で
保持され、後レンズ群７は後移動枠１１で保持されてい
る。Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 is a half sectional side view of a zoom lens barrel according to an embodiment, FIG. 2 is an electric zoom gear mechanism during electric zoom,
Development view of manual zoom gear mechanism and gear switching mechanism, FIG.
FIG. 4 is a development view of a manual zoom gear mechanism and a gear switching mechanism at the time of manual zoom, and FIG. 4 is a front view of a main part of the zoom lens barrel according to the embodiment. In FIG. 1, 1 is a zoom lens barrel,
Reference numeral 3 denotes an optical axis thereof, and reference numerals 5 and 7 denote a front lens group and a rear lens group which form a zoom lens. The front lens group 5 is held by a front moving frame 9 and the rear lens group 7 is held by a rear moving frame 11. ing.
【０００７】ズーム鏡胴１は内側に配設される固定筒１
３と、固定筒１３の外側に配設される外筒１５と、ズー
ム駆動環１７、ズーム操作環１９等を備える。固定筒１
３の外周面に回転可能にズーム駆動環１７が結合され、
その径方向外側に外筒１５が配設され、ズーム駆動環１
７の外周面には歯部１７０１が形成されている。外筒１
５は大径部１５０１と、この大径部１５０１に環状板部
１５０３を介して接続され前記ズーム駆動環１７の後部
外周面との間に隙間を確保して配設される小径部１５０
５とで構成されている。前記固定筒１３の後端及びズー
ム駆動環１７の後端は外筒１５の後端の段部１５０７内
に収容され、外筒１５の後端にはマウント継環２１が連
結され、マウント継環２１の後部の外周面には絞り環２
３が回転可能に配設され、マウント継環２１の後面には
マウント２５が連結され、マウント２５の内側には保護
環２７が連結されている。The zoom lens barrel 1 is a fixed barrel 1 disposed inside.
3, an outer cylinder 15 arranged outside the fixed cylinder 13, a zoom drive ring 17, a zoom operation ring 19, and the like. Fixed cylinder 1
A zoom drive ring 17 is rotatably connected to the outer peripheral surface of 3,
An outer cylinder 15 is arranged on the outside in the radial direction, and the zoom drive ring 1
Toothed portions 1701 are formed on the outer peripheral surface of 7. Outer cylinder 1
Reference numeral 5 denotes a large diameter portion 1501 and a small diameter portion 150 which is connected to the large diameter portion 1501 via an annular plate portion 1503 and is arranged with a gap secured between the rear outer peripheral surface of the zoom drive ring 17.
It is composed of 5 and 5. The rear end of the fixed barrel 13 and the rear end of the zoom drive ring 17 are housed in the step portion 1507 at the rear end of the outer barrel 15, and the mount joint ring 21 is connected to the rear end of the outer barrel 15. 21 on the outer peripheral surface of the rear part of the diaphragm ring 2
3 is rotatably arranged, a mount 25 is connected to the rear surface of the mount joint ring 21, and a protection ring 27 is connected to the inside of the mount 25.
【０００８】前記ズーム操作環１９は、外筒１５の大径
部１５０１の後端外周面とマウント継環２１の前部外周
面にわたり回転可能かつ軸方向に移動可能に配設されて
いる。前記ズーム駆動環１７の前部は固定筒１３よりも
前方に延出し、この前部外周面には前移動枠用駆動環３
１が取着され、前移動枠用駆動環３１の外周面には歯部
３１０１が形成されている。外筒１５の大径部１５０１
の前部にはフォーカスリング３３が取着され、フォーカ
スリング３３の内周面にはカム溝３３０１が形成されて
いる。The zoom operation ring 19 is arranged rotatably and axially movable along the rear end outer peripheral surface of the large diameter portion 1501 of the outer cylinder 15 and the front outer peripheral surface of the mount joint ring 21. The front portion of the zoom drive ring 17 extends forward of the fixed barrel 13, and the front moving frame drive ring 3 is provided on the outer peripheral surface of the front portion.
1 is attached, and a tooth portion 3101 is formed on the outer peripheral surface of the front moving frame drive ring 31. Large diameter part 1501 of outer cylinder 15
A focus ring 33 is attached to the front part of the, and a cam groove 3301 is formed on the inner peripheral surface of the focus ring 33.
【０００９】前記前移動枠９の外周部には、フォーカス
リング３３のカム溝３３０１に係合する突起９０１が形
成され、また、外周部の内周面には前移動枠用駆動環３
１の歯部３１０１に噛合する歯部９０３が形成されてい
る。前記固定筒１３とズーム駆動環１７にはそれぞれカ
ム溝１３０１，１７０３が形成され、後移動枠１１の外
周部に形成された突起１１０１が両カム溝１３０１，１
７０３にわたり係合されている。従って、ズーム駆動環
１７が回転すると、歯部９０３，３１０１を介して前移
動枠９が回転し、このとき、突起９０１がカム溝３３０
１に案内され、これにより前移動枠９及び前レンズ群５
が光軸方向に移動する。また、ズーム駆動環１７が回転
すると、固定筒１３のカム溝１３０１とズーム駆動環１
７のカム溝１７０３との重なる部分が変位し、このカム
溝１３０１，１７０３の重なる部分に突起１１０１が案
内され、これにより後移動枠１１及び後レンズ群７が光
軸方向に移動する。即ち、ズーム駆動環１７が回転する
と、前レンズ群５及び後レンズ群７が光軸方向に移動し
てズーム動作がなされ、実施例では、前記歯部９０３，
３１０１、突起９０１、カム溝３３０１、突起１１０
１、カム溝１３０１，１７０３によりズーム駆動環１７
の回転に連動して前レンズ群５及び後レンズ群７を光軸
方向に移動させズーム倍率を変化させるレンズ移動機構
３４が構成されている。A projection 901 that engages with the cam groove 3301 of the focus ring 33 is formed on the outer peripheral portion of the front moving frame 9, and the front moving frame drive ring 3 is formed on the inner peripheral surface of the outer peripheral portion.
A tooth portion 903 that meshes with the first tooth portion 3101 is formed. Cam grooves 1301 and 1703 are formed on the fixed barrel 13 and the zoom drive ring 17, respectively, and a projection 1101 formed on the outer peripheral portion of the rear moving frame 11 is provided on both cam grooves 1301 and 1703.
It is engaged over 703. Therefore, when the zoom drive ring 17 rotates, the front moving frame 9 rotates via the tooth portions 903 and 3101, and at this time, the protrusion 901 causes the cam groove 330 to move.
1 by which the front moving frame 9 and the front lens group 5 are guided.
Moves in the optical axis direction. When the zoom drive ring 17 rotates, the cam groove 1301 of the fixed barrel 13 and the zoom drive ring 1
The portion of 7 that overlaps the cam groove 1703 is displaced, and the projection 1101 is guided to the portion of the cam grooves 1301 and 1703 that overlap, whereby the rear moving frame 11 and the rear lens group 7 move in the optical axis direction. That is, when the zoom driving ring 17 rotates, the front lens group 5 and the rear lens group 7 move in the optical axis direction to perform a zoom operation.
3101, protrusion 901, cam groove 3301, protrusion 110
1. The zoom drive ring 17 is formed by the cam grooves 1301 and 1703.
A lens moving mechanism 34 is configured to move the front lens group 5 and the rear lens group 7 in the optical axis direction in conjunction with the rotation of the lens to change the zoom magnification.
【００１０】前記外筒１５の小径部１５０５の径方向外
側且つズーム操作環１９の径方向内側には環状板部１５
０３とマウント継環２１により閉塞された環状空間３５
が形成され、環状板部１５０３とマウント継環２１側に
それぞれ環状空間３５の周方向に延在する前軸受板３７
と後軸受板３９が配設され、これら軸受板３７，３９の
周方向両端には、図２に示すように、支軸４１，４３が
掛け渡されている。前記環状空間３５には前記軸受板３
７，３９を介してズーム駆動環駆動用軸４５及び電動ズ
ームギア機構４７、手動ズームギア機構４８、ギア切り
換え機構４９が配設され、また、ズーム用モータ５１が
配設されている。An annular plate portion 15 is provided outside the small diameter portion 1505 of the outer cylinder 15 in the radial direction and inside the zoom operating ring 19 in the radial direction.
03 and the ring space 35 closed by the mount ring 21
And the front bearing plate 37 that extends in the circumferential direction of the annular space 35 on the annular plate portion 1503 and the mount joint ring 21 side.
A rear bearing plate 39 is provided, and spindles 41 and 43 are stretched around both ends of the bearing plates 37 and 39 in the circumferential direction, as shown in FIG. The bearing plate 3 is provided in the annular space 35.
A zoom drive ring driving shaft 45, an electric zoom gear mechanism 47, a manual zoom gear mechanism 48, and a gear switching mechanism 49 are provided via 7, 39, and a zoom motor 51 is provided.
【００１１】電動ズームギア機構４７は、前記軸受板３
７，３９で支持された第１軸５５、第２軸５７、第３軸
５９を備え、ズーム用モータ５１の動力は、前軸受板３
７の前方に配設されたギア列６１を介して前記第１軸５
５に伝達される。第１軸５５にはギア６３が該第１軸５
５と一体回転可能にかつ軸方向に移動可能に結合され、
ギア６３はコイルスプリング６５により前方に付勢され
ている。The electric zoom gear mechanism 47 includes the bearing plate 3
The first shaft 55, the second shaft 57, and the third shaft 59, which are supported by 7, 39, are used to drive the zoom motor 51 with the power of the front bearing plate 3.
7 through the gear train 61 arranged in front of the first shaft 5
5 is transmitted. The gear 63 is attached to the first shaft 55.
5, which is integrally rotatably and axially movable,
The gear 63 is biased forward by a coil spring 65.
【００１２】第２軸５７には第１ギア６７が固着され、
また、第２ギア６９及び第３ギア７１が回転可能に配設
されている。各第１，第２，第３ギア６７，６９，７１
はそれぞれ大径ギア６７Ａ，６９Ａ，７１Ａと小径ギア
６７Ｂ，６９Ｂ，７１Ｂを備え、第１ギア６７の大径ギ
ア６７Ａは前記第１軸５５のギア６３に噛合している。
尚、図中７３はエンコーダで、エンコーダ７３は、第２
軸５７の端部に取着されたスリット板７３０１と、スリ
ット板７３０１を挟む位置で投光器及び受光器を支持す
るケース７３０３等で構成され、ケース７３０３は後軸
受板３９に取着されている。A first gear 67 is fixed to the second shaft 57,
The second gear 69 and the third gear 71 are rotatably arranged. Each of the first, second and third gears 67, 69, 71
Respectively include large diameter gears 67A, 69A, 71A and small diameter gears 67B, 69B, 71B, and the large diameter gear 67A of the first gear 67 meshes with the gear 63 of the first shaft 55.
In the figure, 73 is an encoder, and the encoder 73 is a second
It is composed of a slit plate 7301 attached to the end of the shaft 57, a case 7303 for supporting the light emitter and the light receiver at positions sandwiching the slit plate 7301, and the like, and the case 7303 is attached to the rear bearing plate 39.
【００１３】第３軸５９には第１，第２，第３ギア７
５，７７，７９が回転可能に配設され、各第１，第２ギ
ア７５，７７はそれぞれ大径ギア７５Ａ，７７Ａと小径
ギア７５Ｂ，７７Ｂを備える。そして、前記第２軸５７
の小径ギア６７Ｂと第３軸５９の第１ギア７５の大径ギ
ア７５Ａが噛合し、第２軸５７の大径ギア６９Ａと第３
軸５９の第１ギア７５の小径ギア７５Ｂが噛合し、第２
軸５７の小径ギア６９Ｂと第３軸５９の第２ギア７７の
大径ギア７７Ａが噛合し、第２軸５７の大径ギア７１Ａ
と第３軸５９の第２ギア７７の小径ギア７７Ｂが噛合
し、第２軸５７の小径ギア７１Ｂと第３軸５９の第３ギ
ア７９が噛合している。従って、これら第２軸５７と第
３軸５９のギア６７，６９，７１，７５，７７により、
ズーム用モータ５１の動力を減速して第３軸５９の第３
ギア７９に出力する減速機構が構成されている。On the third shaft 59, the first, second and third gears 7 are provided.
5, 77 and 79 are rotatably arranged, and the first and second gears 75 and 77 respectively include large diameter gears 75A and 77A and small diameter gears 75B and 77B. Then, the second shaft 57
The small diameter gear 67B of the third shaft 59 meshes with the large diameter gear 75A of the first gear 75 of the third shaft 59, and the large diameter gear 69A of the second shaft 57 and the third gear 59A
The small diameter gear 75B of the first gear 75 of the shaft 59 meshes with the second gear 75B.
The small diameter gear 69B of the shaft 57 meshes with the large diameter gear 77A of the second gear 77 of the third shaft 59, and the large diameter gear 71A of the second shaft 57 is engaged.
And the small diameter gear 77B of the second gear 77 of the third shaft 59 meshes with each other, and the small diameter gear 71B of the second shaft 57 meshes with the third gear 79 of the third shaft 59. Therefore, by the gears 67, 69, 71, 75, 77 of the second shaft 57 and the third shaft 59,
The power of the zoom motor 51 is decelerated to reduce the power of the third shaft 59 to the third position.
A deceleration mechanism that outputs to the gear 79 is configured.
【００１４】前記ズーム駆動環駆動用軸４５が前軸受板
３７の前方に突出する部分には前記歯部１７０１に噛合
するズーム駆動環駆動用ギア８１が取着されている。前
記ズーム駆動環駆動用軸４５には、第１ギア８３が固着
され、また、筒体８５が回転可能かつ軸方向に移動可能
に結合され、さらに、この筒体８５にその端面が当接す
るようにコイルスプリング８７に付勢されて第２ギア８
９がズーム駆動環駆動用軸４５と一体に回転可能かつ軸
方向に移動可能に配設されている。A zoom drive ring drive gear 81 which meshes with the tooth portion 1701 is attached to a portion of the front end of the front bearing plate 37 where the zoom drive ring drive shaft 45 projects. A first gear 83 is fixed to the zoom drive ring driving shaft 45, and a tubular body 85 is rotatably and axially movably coupled to the zoom drive ring driving shaft 45. Further, an end surface of the tubular body 85 contacts the tubular body 85. The second gear 8 is biased by the coil spring 87.
The zoom driving ring driving shaft 45 is integrally rotatable with the zoom driving ring driving shaft 45 and movable in the axial direction.
【００１５】手動ズームギア機構４８及びギア切り換え
機構４９は、第１軸９０と、前記支軸４３と、前記第
１，第２ギア８３，８９等を備えている。前記支軸４３
には筒状部材９１が軸方向に移動可能に結合されてい
る。筒状部材９１には第１ズームレバー９１０１と第２
ズームレバー９１０３が突設されている。前記第１ズー
ムレバー９１０１はズーム操作環１９の内周部の溝１９
０１に係合され、この溝１９０１は周方向に所定の長さ
延在して形成され、従って、ズーム操作環１９を光軸方
向に移動させるとこれと一体に筒状部材９１が移動する
が、ズーム操作環１９を回転させても第１ズームレバー
９１０１は溝１９０１内に留まるのみで筒状部材９１は
回転しない。また、筒状部材９１の外周面には軸方向に
間隔をおいて前凹部９１１１と後凹部９１１３が形成さ
れ、これら凹部９１１１，９１１３には後軸受板３９に
取着されたバネ板９３の突部９３０１が係合可能で、バ
ネ板９３の突部９３０１がいずれかの凹部９１１１，９
１１３に係合することで、該筒状部材９１の位置が保持
されるように構成され、バネ板９３と凹部９１１１，９
１１３によりクリック機構が構成されている。The manual zoom gear mechanism 48 and the gear switching mechanism 49 are provided with a first shaft 90, the support shaft 43, the first and second gears 83, 89 and the like. The support shaft 43
A tubular member 91 is coupled to the shaft movably in the axial direction. The tubular member 91 includes a first zoom lever 9101 and a second zoom lever 9101.
A zoom lever 9103 is provided so as to project. The first zoom lever 9101 is provided with a groove 19 in the inner peripheral portion of the zoom operation ring 19.
01, and the groove 1901 is formed to extend in the circumferential direction by a predetermined length. Therefore, when the zoom operation ring 19 is moved in the optical axis direction, the tubular member 91 moves integrally therewith. Even when the zoom operation ring 19 is rotated, the first zoom lever 9101 remains only in the groove 1901 and the tubular member 91 does not rotate. A front concave portion 9111 and a rear concave portion 9113 are formed on the outer peripheral surface of the tubular member 91 at intervals in the axial direction, and the protrusions of the spring plate 93 attached to the rear bearing plate 39 are formed in the concave portions 9111 and 9113. The protrusion 9301 of the spring plate 93 is engageable with the recess 9111, 9
The position of the tubular member 91 is held by engaging with the 113, and the spring plate 93 and the recesses 9111, 9
A click mechanism is constituted by 113.
【００１６】第１軸９０にはギア９５が該第１軸９０と
一体回転可能にかつ軸方向に移動可能に結合され、ギア
９５はコイルスプリング９７により後方に付勢されてい
る。また、第１軸９０には筒体９９が軸方向に移動可能
に結合され、前記ギア９５の端面はこの筒体９９の端面
に当接することで位置決めされる。前記ギア９５は大径
ギア９５Ａと小径ギア９５Ｂを備え、大径ギア９５Ａは
ズーム操作環１９の内周部に形成された歯部１９０３に
噛合可能で、小径ギア９５Ｂは前記ズーム駆動環駆動用
軸４５の第１ギア８３に噛合可能である。A gear 95 is coupled to the first shaft 90 so as to be rotatable integrally with the first shaft 90 and axially movable, and the gear 95 is biased rearward by a coil spring 97. A cylinder 99 is movably coupled to the first shaft 90 in the axial direction, and the end surface of the gear 95 is positioned by contacting the end surface of the cylinder 99. The gear 95 includes a large-diameter gear 95A and a small-diameter gear 95B. The large-diameter gear 95A can mesh with a tooth portion 1903 formed on the inner peripheral portion of the zoom operation ring 19, and the small-diameter gear 95B drives the zoom drive ring. It can be meshed with the first gear 83 of the shaft 45.
【００１７】前記第２ズームレバー９１０３は前記筒体
９９とズーム駆動環駆動用軸４５の筒体８５に係合し、
ズーム操作環１９を軸方向に動かした時に、これら筒体
８５，９９をズーム操作環１９と一体的に軸方向に動か
すように構成されている。そして、図２に示すように、
ズーム操作環１９を前方にスライドさせた時に、後凹部
９１１３とバネ板９３の突部９３０１が係合し、ズーム
操作環１９が電動ズーム位置となり、この位置でズーム
駆動環駆動用軸４５の第１ギア８３と第１軸９０の小径
ギア９５Ｂが軸方向に離れると共に、ズーム駆動環駆動
用軸４５の第２ギア８９と第３軸５９の第３ギア７９が
噛合するように構成されている。また、図３に示すよう
に、ズーム操作環１９を後方にスライドさせた時に、前
凹部９１１１とバネ板９３の突部９３０１が係合し、ズ
ーム操作環１９が手動ズーム位置となり、この位置でズ
ーム駆動環駆動用軸４５の第２ギア８９と第３軸５９の
第３ギア７９が軸方向に離れると共に、ズーム駆動環駆
動用軸４５の第１ギア８３と第１軸９０の小径ギア９５
Ｂが噛合するように構成されている。The second zoom lever 9103 engages with the tubular body 99 and the tubular body 85 of the zoom drive ring driving shaft 45,
When the zoom operation ring 19 is moved in the axial direction, the cylindrical bodies 85 and 99 are moved in the axial direction integrally with the zoom operation ring 19. Then, as shown in FIG.
When the zoom operation ring 19 is slid forward, the rear concave portion 9113 and the projection 9301 of the spring plate 93 are engaged with each other, and the zoom operation ring 19 becomes the electric zoom position. At this position, the zoom drive ring drive shaft 45 The first gear 83 and the small-diameter gear 95B of the first shaft 90 are separated from each other in the axial direction, and the second gear 89 of the zoom drive ring driving shaft 45 and the third gear 79 of the third shaft 59 mesh with each other. . Further, as shown in FIG. 3, when the zoom operation ring 19 is slid backward, the front concave portion 9111 and the projection 9301 of the spring plate 93 are engaged, and the zoom operation ring 19 becomes the manual zoom position. The second gear 89 of the zoom driving ring driving shaft 45 and the third gear 79 of the third shaft 59 are separated from each other in the axial direction, and the first gear 83 of the zoom driving ring driving shaft 45 and the small diameter gear 95 of the first shaft 90 are separated.
B is configured to mesh.
【００１８】従って、実施例では、ズーム操作環１９の
回転力をズーム駆動環駆動用ギア８１に伝達する手動ズ
ームギア機構４８は、前記ズーム操作環１９の歯部１９
０３、大径ギア９５Ａ、小径ギア９５Ｂ、第１ギア８３
により構成されている。また、ギア切り換え機構４９
は、第１，第２ズームレバー９１０１，９１０３、コイ
ルスプリング９７、ギア９５、筒体９９，８５、コイル
スプリング８７、第２ギア８９により構成されている。Therefore, in the embodiment, the manual zoom gear mechanism 48 for transmitting the rotational force of the zoom operation ring 19 to the zoom drive ring drive gear 81 has a tooth portion 19 of the zoom operation ring 19.
03, large diameter gear 95A, small diameter gear 95B, first gear 83
It is composed by. Also, the gear switching mechanism 49
Is composed of first and second zoom levers 9101 and 9103, a coil spring 97, a gear 95, cylindrical bodies 99 and 85, a coil spring 87, and a second gear 89.
【００１９】本実施例は前記のように構成したので、図
２に示すように、ズーム操作環１９を電動ズーム位置に
スライドさせると、ズーム駆動環駆動用軸４５の第２ギ
ア８９と第３軸５９の第３ギア７９が噛合する。ここ
で、不図示の電動ズームスイッチを操作すると、ズーム
用モータ５１が駆動され、ズーム用モータ５１の動力
が、ギア列６１、ギア６７，６９，７１，７５，７７を
介して第３軸５９の第３ギア７９からズーム駆動環駆動
用軸４５の第２ギア８９に伝達され、ズーム駆動環駆動
用軸４５を回転させる。ズーム駆動環駆動用軸４５が回
転されると、ズーム駆動環駆動用ギア８１及び歯部１７
０１を介してズーム駆動環１７が回転される。そして、
ズーム駆動環１７が回転されると、前レンズ群５及び後
レンズ群７が光軸方向に移動し、電動ズーム動作がなさ
れる。Since the present embodiment is constructed as described above, when the zoom operating ring 19 is slid to the electric zoom position as shown in FIG. 2, the second gear 89 and the third gear 89 of the zoom driving ring driving shaft 45 and the third gear 89 are moved. The third gear 79 of the shaft 59 meshes. Here, if an electric zoom switch (not shown) is operated, the zoom motor 51 is driven, and the power of the zoom motor 51 is transmitted through the gear train 61, the gears 67, 69, 71, 75, 77 to the third shaft 59. Is transmitted from the third gear 79 to the second gear 89 of the zoom drive ring drive shaft 45 to rotate the zoom drive ring drive shaft 45. When the zoom drive ring drive shaft 45 is rotated, the zoom drive ring drive gear 81 and the tooth portion 17 are rotated.
The zoom drive ring 17 is rotated via 01. And
When the zoom drive ring 17 is rotated, the front lens group 5 and the rear lens group 7 move in the optical axis direction, and an electric zoom operation is performed.
【００２０】また、図３に示すように、ズーム操作環１
９を手動ズーム位置にスライドさせると、ズーム駆動環
駆動用軸４５の第１ギア８３と第１軸９０の小径ギア９
５Ｂが噛合する。ここで、ズーム操作環１９を回転させ
ると、ズーム操作環１９の歯部１９０３、大径ギア９５
Ａ、小径ギア９５Ｂ、第１ギア８３を介してズーム操作
環１９の回転力がズーム駆動環駆動用軸４５に伝達さ
れ、ズーム駆動環駆動用軸４５を回転させる。ズーム駆
動環駆動用軸４５が回転されると、ズーム駆動環駆動用
ギア８１及び歯部１７０１を介してズーム駆動環１７が
回転され、前レンズ群５及び後レンズ群７が光軸方向に
移動し、手動ズーム動作がなされる。Further, as shown in FIG. 3, the zoom operation ring 1
9 is slid to the manual zoom position, the first gear 83 of the zoom drive ring driving shaft 45 and the small diameter gear 9 of the first shaft 90 are moved.
5B meshes. Here, when the zoom operation ring 19 is rotated, the tooth portion 1903 of the zoom operation ring 19 and the large diameter gear 95 are rotated.
The rotational force of the zoom operation ring 19 is transmitted to the zoom drive ring drive shaft 45 via A, the small diameter gear 95B, and the first gear 83, and the zoom drive ring drive shaft 45 is rotated. When the zoom drive ring drive shaft 45 is rotated, the zoom drive ring 17 is rotated via the zoom drive ring drive gear 81 and the tooth portion 1701, and the front lens group 5 and the rear lens group 7 are moved in the optical axis direction. Then, the manual zoom operation is performed.
【００２１】従って、本実施例によれば、環状空間３５
に手動ズームギア機構４８及びギア切り換え機構４９を
配設し、特に、手動ズーム時にもギア機構によりズーム
駆動環１７を回転させるようにしたので、従来のように
ズーム操作環１９と一体に第１，第２ズームアーム９１
０１，９１０３を回転させる必要はなくなり、従って、
従来のようにズームレバーが回転移動するための大きな
スペースを、環状空間３５に確保する必要がなくなり、
電動ズームギア機構を構成する電装品や、モータ、ギア
等の各種部品を配置する上で有利となり、カメラのコン
パクト化を図ることが可能となる。Therefore, according to this embodiment, the annular space 35
A manual zoom gear mechanism 48 and a gear switching mechanism 49 are arranged in the zoom drive ring 17, and in particular, the zoom drive ring 17 is rotated by the gear mechanism even during manual zooming. Second zoom arm 91
No need to rotate 01, 9103, so
There is no need to secure a large space in the annular space 35 for rotating the zoom lever as in the conventional case,
This is advantageous in arranging the electrical components that make up the electric zoom gear mechanism and various parts such as the motor and the gear, and allows the camera to be made compact.
【００２２】[0022]
【発明の効果】以上の説明で明らかなように本発明は、
固定筒上で回転可能に支持されたズーム駆動環と、前記
ズーム駆動環の回転に連動して少なくとも一枚のレンズ
を光軸方向に移動させズーム倍率を変化させるレンズ移
動機構と、前記ズーム駆動環を回転させるズーム駆動環
駆動用ギアと、前記ズーム駆動環の外側で回転可能且つ
光軸方向に移動可能に配設されたズーム操作環と、モー
タの動力を前記ズーム駆動環駆動用ギアに伝達する電動
ズームギア機構と、前記ズーム操作環の内周部に形成さ
れた歯部に噛合するギアを有し、前記ズーム操作環の回
転力を前記ズーム駆動環駆動用ギアに伝達する手動ズー
ムギア機構と、前記ズーム操作環が光軸方向の一方の側
にスライドした状態で、前記ズーム駆動環駆動用ギアと
前記電動ズームギア機構とを連結すると共に、前記手動
ズームギア機構とズーム駆動環駆動用ギアとの連結を解
除し、ズーム操作環が光軸方向の他方の側にスライドし
た状態で、前記ズーム駆動環駆動用ギアと前記電動ズー
ムギア機構との連結を解除すると共に、前記手動ズーム
ギア機構と前記ズーム駆動環駆動用ギアとを連結するギ
ア切り換え機構とを備え、前記ズーム駆動環とズーム操
作環との間に環状空間が形成され、前記環状空間には、
該環状空間の周方向に延在する前軸受板と後軸受板とが
前記光軸方向に間隔をおいて配設され、前記電動ズーム
ギア機構と手動ズームギア機構とギア切り換え機構は、
前記環状空間内で前記前軸受板と後軸受板の間に配設し
た。そのため、簡単な構造の手動ズームギア機構とギア
切り換え機構により手動ズームから電動ズームへの切り
換え及び電動ズームから手動ズームへの切り換えを確実
に行えることは無論のこと、これら機構をズーム駆動環
とズーム操作環との間の環状空間に大きなスペースを確
保することなく配設でき、カメラのコンパクト化を図る
ことが可能となる。As is apparent from the above description, the present invention is
A zoom drive ring rotatably supported on a fixed barrel, a lens moving mechanism that moves at least one lens in the optical axis direction in association with the rotation of the zoom drive ring to change the zoom magnification, and the zoom drive. a zoom drive ring driving gear for rotating the ring, the the zoom operation ring that is movably disposed rotatable and the optical axis direction outside of the zoom driving ring, the power of the M o <br/> data zoom An electric zoom gear mechanism that is transmitted to a drive ring driving gear, and a gear that meshes with a tooth portion formed on an inner peripheral portion of the zoom operating ring are provided, and the rotational force of the zoom operating ring is driven by the zoom driving ring driving gear. transmitted to the manual zoom gear mechanism, with the front Symbol zooming operation ring is slid to one side of the optical axis direction, thereby connecting the said zoom drive ring driving gear electric zoom gear mechanism, the manual zoom gear motor And the zoom drive ring drive gear are disconnected, and the zoom drive ring drive gear and the electric zoom gear mechanism are disconnected while the zoom operation ring slides to the other side in the optical axis direction. And a gear switching mechanism that connects the manual zoom gear mechanism and the zoom drive ring driving gear to each other.
An annular space is formed between the ring and the annular space,
A front bearing plate and a rear bearing plate extending in the circumferential direction of the annular space,
The electric zoom is arranged at intervals in the optical axis direction.
The gear mechanism, manual zoom gear mechanism and gear switching mechanism
It is arranged between the front bearing plate and the rear bearing plate in the annular space.
It was Therefore, it is obvious that the manual zoom gear mechanism and the gear switching mechanism with a simple structure can surely switch from the manual zoom to the electric zoom and from the electric zoom to the manual zoom. It can be arranged without securing a large space in the annular space between the ring and the camera, and the camera can be made compact.
【図１】実施例に係るズーム鏡胴の半部断面側面図であ
る。FIG. 1 is a half sectional side view of a zoom lens barrel according to an embodiment.
【図２】電動ズーム時における電動ズームギア機構、手
動ズームギア機構、ギア切り換え機構の展開図である。FIG. 2 is a development view of an electric zoom gear mechanism, a manual zoom gear mechanism, and a gear switching mechanism during electric zoom.
【図３】手動ズーム時における手動ズームギア機構、ギ
ア切り換え機構の展開図である。FIG. 3 is a development view of a manual zoom gear mechanism and a gear switching mechanism during manual zoom.
【図４】実施例に係るズーム鏡胴の要部の正面図であ
る。FIG. 4 is a front view of a main part of the zoom lens barrel according to the embodiment.
１ ズーム鏡胴 ５ 前レンズ群 ７ 後レンズ群 １３ 固定筒 １７ ズーム駆動環 １９ ズーム操作環 ３４ レンズ移動機構 ３５ 環状空間 ４５ ズーム駆動環駆動用軸 ４７ 電動ズームギア機構 ４８ 手動ズームギア機構 ４９ ギア切り換え機構 ８１ ズーム駆動環駆動用ギア 1 zoom lens barrel 5 front lens group 7 Rear lens group 13 Fixed tube 17 Zoom drive ring 19 Zoom operation ring 34 Lens moving mechanism 35 annular space 45 Zoom drive ring drive shaft 47 Electric zoom gear mechanism 48 Manual zoom gear mechanism 49 Gear switching mechanism 81 Zoom drive ring drive gear
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平５−34563（ＪＰ，Ａ) 特開 平３−233418（ＪＰ，Ａ) 特開 平４−344607（ＪＰ，Ａ) 特開 平３−233419（ＪＰ，Ａ) 特開 昭63−113512（ＪＰ，Ａ) 特開 昭63−237018（ＪＰ，Ａ) 実開 平３−8307（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) G02B 7/08 G02B 7/04 ─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-5-34563 (JP, A) JP-A-3-233418 (JP, A) JP-A-4-344607 (JP, A) JP-A-3- 233419 (JP, A) JP-A-63-113512 (JP, A) JP-A-63-237018 (JP, A) Jitsukaihei 3-8307 (JP, U) (58) Fields investigated (Int.Cl. 7 , DB name) G02B 7/08 G02B 7/04
Claims (4)
駆動環と、 前記ズーム駆動環の回転に連動して少なくとも一枚のレ
ンズを光軸方向に移動させズーム倍率を変化させるレン
ズ移動機構と、 前記ズーム駆動環を回転させるズーム駆動環駆動用ギア
と、 前記ズーム駆動環の外側で回転可能且つ光軸方向に移動
可能に配設されたズーム操作環と、モ ータの動力を前記ズーム駆動環駆動用ギアに伝達する
電動ズームギア機構と、 前記ズーム操作環の内周部に形成された歯部に噛合する
ギアを有し、前記ズーム操作環の回転力を前記ズーム駆
動環駆動用ギアに伝達する手動ズームギア機構と、前 記ズーム操作環が光軸方向の一方の側にスライドした
状態で、前記ズーム駆動環駆動用ギアと前記電動ズーム
ギア機構とを連結すると共に、前記手動ズームギア機構
とズーム駆動環駆動用ギアとの連結を解除し、ズーム操
作環が光軸方向の他方の側にスライドした状態で、前記
ズーム駆動環駆動用ギアと前記電動ズームギア機構との
連結を解除すると共に、前記手動ズームギア機構と前記
ズーム駆動環駆動用ギアとを連結するギア切り換え機構
とを備え、 前記ズーム駆動環とズーム操作環との間に環状空間が形
成され、 前記環状空間には、該環状空間の周方向に延在する前軸
受板と後軸受板とが前記光軸方向に間隔をおいて配設さ
れ、 前記電動ズームギア機構と手動ズームギア機構とギア切
り換え機構は、前記環状空間内で前記前軸受板と後軸受
板の間に配設されている、 ことを特徴とするズーム鏡胴。1. A zoom drive ring rotatably supported on a fixed barrel, and a lens moving mechanism for changing at least one lens in the optical axis direction in association with the rotation of the zoom drive ring to change the zoom magnification. When the zoom drive ring driving gear for rotating the zoom driving ring, and the zoom operation ring is movably disposed in a rotatable and the optical axis direction outside of the zoom driving ring, the power of the motors the An electric zoom gear mechanism for transmitting to a zoom driving ring driving gear, and a gear that meshes with a tooth portion formed on an inner peripheral portion of the zoom operating ring are provided, and the rotational force of the zoom operating ring is used for driving the zoom driving ring. a manual zoom gear mechanism for transmitting to the gear, the pre-Symbol zoom operation ring while sliding to one side of the optical axis direction, connecting to the zoom drive ring drive gear and the electric zoom gear mechanism, the manual With the zoom gear mechanism and the zoom drive ring drive gear disconnected, the zoom drive ring slides to the other side in the optical axis direction, and the zoom drive ring drive gear is disconnected from the electric zoom gear mechanism. And a gear switching mechanism that connects the manual zoom gear mechanism and the zoom drive ring driving gear.
And an annular space is formed between the zoom drive ring and the zoom operation ring.
And a front shaft extending in the circumferential direction of the annular space.
The receiving plate and the rear bearing plate are arranged with a space in the optical axis direction.
The electric zoom gear mechanism, manual zoom gear mechanism and gear
The replacement mechanism includes the front bearing plate and the rear bearing in the annular space.
A zoom lens barrel characterized by being arranged between plates .
駆動用軸に設けられ、前記手動ズームギア機構は、この
ズーム駆動環駆動用軸に該ズーム駆動環駆動用軸と一体
に回転可能に配設され前記ズーム操作環の内周部の歯部
と噛合するギアに噛合可能な第１ギアを備える請求項１
記載のズーム鏡胴。2. A zoom drive ring drive gear is provided on a zoom drive ring drive shaft, and the manual zoom gear mechanism is rotatably arranged on the zoom drive ring drive shaft integrally with the zoom drive ring drive shaft. The first gear that is meshable with a gear that is provided and meshes with a tooth portion of an inner peripheral portion of the zoom operation ring.
The described zoom lens barrel.
駆動用軸に設けられ、前記ギア切り換え機構は、このズ
ーム駆動環駆動用軸に軸方向に移動可能且つズーム駆動
環駆動用軸と一体に回転可能に配設され、前記電動ズー
ムギア機構に連結可能な第２ギアを備える請求項１記載
のズーム鏡胴。3. A zoom drive ring drive gear is provided on a zoom drive ring drive shaft, and the gear switching mechanism is axially movable to the zoom drive ring drive shaft and is integral with the zoom drive ring drive shaft. The zoom lens barrel according to claim 1, further comprising a second gear rotatably disposed in the electric zoom gear mechanism.
駆動用軸に設けられ、前記手動ズームギア機構は、この
ズーム駆動環駆動用軸に該ズーム駆動環駆動用軸と一体
に回転可能に配設され前記ズーム操作環の内周部の歯部
と噛合するギアに噛合可能な第１ギアを備え、前記ギア
切り換え機構は、前記ズーム駆動環駆動用軸に軸方向に
移動可能且つズーム駆動環駆動用軸と一体に回転可能に
配設され、前記電動ズームギア機構に連結可能な第２ギ
アを備え、更に、前記ギア切り換え機構は、前記ズーム
操作環の内周部の歯部と噛合するギアと前記第２ギアを
ズーム操作環の光軸方向へのスライドに連動させて軸方
向へ移動させるズームレバーを備える請求項１記載のズ
ーム鏡胴。4. A zoom drive ring drive gear is provided on a zoom drive ring drive shaft, and the manual zoom gear mechanism is rotatably arranged on the zoom drive ring drive shaft integrally with the zoom drive ring drive shaft. A first gear that is provided and is meshable with a gear that meshes with a tooth portion of an inner peripheral portion of the zoom operation ring, wherein the gear switching mechanism is axially movable to the zoom drive ring drive shaft A second gear that is rotatably disposed integrally with the drive shaft and that is connectable to the electric zoom gear mechanism is provided. Further, the gear switching mechanism is a gear that meshes with a tooth portion of an inner peripheral portion of the zoom operation ring. The zoom lens barrel according to claim 1, further comprising: a zoom lever that moves the second gear in the axial direction in association with sliding of the second operation ring in the optical axis direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24071394A JP3445378B2 (en) | 1994-09-07 | 1994-09-07 | Zoom lens barrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24071394A JP3445378B2 (en) | 1994-09-07 | 1994-09-07 | Zoom lens barrel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0875978A JPH0875978A (en) | 1996-03-22 |
| JP3445378B2 true JP3445378B2 (en) | 2003-09-08 |
Family
ID=17063607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24071394A Expired - Fee Related JP3445378B2 (en) | 1994-09-07 | 1994-09-07 | Zoom lens barrel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3445378B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4969310B2 (en) * | 2007-05-01 | 2012-07-04 | 富士フイルム株式会社 | Lens barrel and projector equipped with the same |
| JP6009752B2 (en) * | 2011-10-07 | 2016-10-19 | オリンパス株式会社 | Zoom lens barrel |
| JP6027811B2 (en) * | 2011-10-07 | 2016-11-16 | オリンパス株式会社 | Lens barrel |
| JP6819290B2 (en) * | 2014-09-19 | 2021-01-27 | ソニー株式会社 | Lens barrel of medical observation device and medical observation device |
-
1994
- 1994-09-07 JP JP24071394A patent/JP3445378B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0875978A (en) | 1996-03-22 |
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