JP2000056203A - Lens barrel - Google Patents
Lens barrelInfo
- Publication number
- JP2000056203A JP2000056203A JP10239452A JP23945298A JP2000056203A JP 2000056203 A JP2000056203 A JP 2000056203A JP 10239452 A JP10239452 A JP 10239452A JP 23945298 A JP23945298 A JP 23945298A JP 2000056203 A JP2000056203 A JP 2000056203A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- lens barrel
- ring
- stator
- wave motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Lens Barrels (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、インナーフォーカ
ス方式やリヤフォーカス方式のレンズ鏡筒に関し、さら
に詳しくは振動波モーターを用い、距離環調整を切替え
手段を用いずに手動と自動とを切替え可能とするレンズ
鏡筒に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens barrel of an inner focus type or a rear focus type, and more particularly, to switching between manual and automatic without using a switching means for adjusting a distance ring using a vibration wave motor. And a lens barrel.
【０００２】[0002]
【従来の技術】従来より振動波モ−タ−を有し、振動波
モ−タ−駆動による自動焦点調整と、手動操作による手
動焦点調整が切り替え手段を使わずに可能にしたレンズ
鏡筒は、多数生産されている。これらのレンズ鏡筒で振
動波モ−タ−を用いたレンズ鏡筒において、振動波モー
ターは加圧接触されたロ−タ−とステ−タ−から成り立
ち、ステ−タ−は、ロ−タ−の光軸方向に対して反対方
向に加圧接触させるための加圧部材と、振動を吸収する
ための吸収材等を有している。またロ−タ−は、ステ−
タ−の光軸方向に対して反対方向に軸受け、連結部材を
有する。これらステ−タ−とロ−タ−の配置は、加圧接
触させて組み立てる関係上、駆動部材が、振動波モ−タ
−のロ−タ−側にあるためレンズ鏡筒の光軸方向に対し
て、物体側にローター、結像側にステーターという配置
になっている。また特開平２−２５３２１４号、特開平
２−２５３２１７号公報等においてフォ−カスレンズ移
動環に固設された光軸に対して直交する放射方向の回転
軸を中心として回転可能なロ−ラ−を有し、前記ロ−ラ
−を振動波モ−タ−の駆動部であるロ−タ−とマニュア
ルフォ−カス操作リングとの間で光軸方向に加圧挟持さ
せることにより、前記ロ−タ−と前記マニュアルフォ−
カス操作リングのどちらを駆動させても前記ロ−ラ−を
回動させてフォ−カスレンズ移動環を作動させる伝達機
構を特徴とするレンズ鏡筒が提案されている。2. Description of the Related Art A lens barrel which has a vibration wave motor and enables automatic focus adjustment by driving a vibration wave motor and manual focus adjustment by manual operation without using switching means is known. , Are produced in large numbers. In a lens barrel using a vibration wave motor in these lens barrels, the vibration wave motor is composed of a rotor and a stator in press contact, and the stator is a rotor. It has a pressing member for making pressure contact in a direction opposite to the optical axis direction of-, an absorbing material for absorbing vibration, and the like. The rotor is a stay
It has a bearing and a connecting member in the direction opposite to the optical axis direction of the tar. The arrangement of the stator and the rotor is such that the driving member is located on the rotor side of the vibration wave motor, and therefore, is arranged in the direction of the optical axis of the lens barrel because the assembly is carried out by pressing and contacting. On the other hand, the rotor is arranged on the object side and the stator is arranged on the imaging side. Further, in Japanese Patent Application Laid-Open Nos. 2-253214 and 2-253217, a roller rotatable around a rotational axis in a radial direction orthogonal to an optical axis fixed to a focus lens moving ring is described. The rotor is pressurized and held in the direction of the optical axis between a rotor, which is a driving unit of a vibration wave motor, and a manual focusing operation ring, thereby providing the rotor. -And the manual
There has been proposed a lens barrel characterized by a transmission mechanism for operating the focusing lens moving ring by rotating the roller regardless of which of the scab operation rings is driven.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、リヤフ
ォ−カス、またはインナ−フォ−カスのレンズ鏡筒にお
いて、従来技術によるロ−タ−、ステ−タ−の配置で振
動波モ−タ−を搭載した時、駆動するレンズが振動波モ
−タ−のステ−タ−よりも結像側に位置する事になり、
振動波モ−タ−からの動力を伝える為に、連結部材のパ
−ツ点数が増えたり、部品形状が複雑になってしまい、
どうしてもモ−タ−ユニットとしてのスペ−スが大きく
なってしまい、結果的にレンズ鏡筒の全長が長くなった
り、パ−ツ点数が増え、動力の伝達精度が悪くなり、コ
ストを含め設計上の大きな障害となっていた。However, in a rear focus or inner focus lens barrel, an oscillatory wave motor is mounted in a conventional arrangement of a rotor and a stator. When this is done, the lens to be driven will be located closer to the image forming side than the stator of the vibration wave motor,
In order to transmit the power from the vibration wave motor, the number of parts of the connecting member increases and the shape of the parts becomes complicated.
Inevitably, the space as a motor unit becomes large, and as a result, the total length of the lens barrel becomes longer, the number of parts increases, and the power transmission accuracy deteriorates. Had become a major obstacle.
【０００４】[0004]
【課題を解決するための手段】上記問題を解決する為、
本発明のレンズ鏡筒においては振動波モ−タ−を物体側
より順にステ−タ−を加圧接触させるための加圧部材、
振動を吸収するための吸収材、ステ−タ−、ロ−タ−、
出力リングと配置する事により、問題解決を図った。ま
た、レンズの光軸に直交する回転軸を固設した振動波モ
−タ−の駆動部材と、回転軸を中心にして回転するギヤ
付回転伝達部材と、ギヤ付回転伝達部材をフォーカスリ
ングに加圧接触させるための加圧手段と、レンズ鏡筒の
固定筒に対して回転可能なレンズ鏡室と、ギヤ付回転伝
達部材とレンズ移動環を連動させる連動部を設けた。In order to solve the above problems,
In the lens barrel of the present invention, a pressure member for bringing the vibration wave motor into pressure contact with the stator in order from the object side;
Absorbers for absorbing vibrations, stators, rotors,
The problem was solved by arranging it with the output ring. Further, a driving member of a vibration wave motor having a fixed rotation axis perpendicular to the optical axis of the lens, a rotation transmission member with gears rotating about the rotation axis, and a rotation transmission member with gears are mounted on a focus ring. A pressurizing unit for pressurizing contact, a lens mirror chamber rotatable with respect to the fixed lens barrel, and an interlocking unit for interlocking the rotation transmission member with gear and the lens moving ring are provided.
【０００５】[0005]
【実施例】以下に本発明によるレンズ鏡筒の実施例を図
面を参照して説明する。図１は本発明の実施例を示すレ
ンズ鏡筒の断面図で、上側が無限遠撮影時、下側が近距
離撮影時の状態を示している。図２はギヤ付回転伝達部
材付近を示す拡大断面図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a lens barrel according to the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a lens barrel showing an embodiment of the present invention. The upper side shows a state at the time of infinity shooting, and the lower side shows a state at the time of close distance shooting. FIG. 2 is an enlarged sectional view showing the vicinity of the rotation transmission member with gears.
【０００６】図１において、本発明のレンズ鏡筒はマウ
ント１７を有しており、不図示のカメラ本体のマウント
に取り付けられる。また、このレンズ鏡筒はマウント１
７の近傍に不図示の電気接点を備え、電源の供給や制御
信号の授受をカメラ本体と行う方式のレンズ鏡筒であ
る。固定レンズＬ１、Ｌ２は、レンズ鏡室３にレンズ押
え２とレンズ押え２５のネジ締結によって取付けられて
いる。保持筒１２はレンズ鏡筒の固定筒２４にビス締結
されている。レンズ鏡室３０は固定筒２４の内径に不図
示のカム溝に添ってビス締結されたコロ１８、２９を介
して光軸方向に回転摺動でき、フォ−カスレンズＬ３が
レンズ押え３１のネジ締結によって取付けられている。
連結リング１３は保持筒１２と連結リング押え１４によ
って回転可能な状態で挟持されており不図示の距離目盛
リングがとりつけられている。またレンズ鏡室３０と連
動するためのスケ−ルレバ−１６が取り付けられてい
る。In FIG. 1, the lens barrel of the present invention has a mount 17 and is attached to a mount of a camera body (not shown). This lens barrel is mounted on mount 1.
7 is a lens barrel provided with an electric contact (not shown) in the vicinity of the camera 7 and for supplying power and transmitting and receiving control signals to and from the camera body. The fixed lenses L1 and L2 are attached to the lens mirror chamber 3 by screwing the lens holder 2 and the lens holder 25 together. The holding barrel 12 is screwed to a fixed barrel 24 of a lens barrel. The lens mirror chamber 30 can be rotated and slid in the optical axis direction through rollers 18 and 29 screwed to the inner diameter of the fixed barrel 24 along a cam groove (not shown), and the focus lens L3 is screwed to the lens holder 31. Installed by.
The connecting ring 13 is rotatably held by the holding cylinder 12 and the connecting ring retainer 14, and a distance scale ring (not shown) is attached thereto. Further, a scale lever 16 for interlocking with the lens mirror room 30 is attached.
【０００７】さらに図２に示すようにレンズ移動環２３
と連動するための連結リング溝１３ａがありレンズ移動
環２３の突起部２３ｂと接続している。レンズ移動環２
３は保持筒１２とレンズ移動環押え２２によって回転可
能な状態で挟持されておりギヤ付き回転伝達部材９のギ
ヤ部９ｂと連動するギヤ２３ａが設けてある。本実施例
ではギヤ２３ａにクラウンギヤを使用している。フォ−
カスリング６は保持筒１２とギヤ付き回転伝達部材９に
よって回転可能な状態で挟持されており、振動波モ−タ
−のロ−タ−２１側の端面はギヤ付き回転伝達部材９の
ロ−ラ−部９ａの回動面となっている。回動面を出力リ
ング１１に固設されたレンズの光軸に直交する回転軸１
０を中心にしてギヤ付き回転伝達部材９が回動する。Further, as shown in FIG.
There is a connecting ring groove 13 a for interlocking with the projection 23 b of the lens moving ring 23. Lens moving ring 2
Reference numeral 3 denotes a gear 23a which is rotatably held by the holding cylinder 12 and the lens moving ring presser 22, and is interlocked with the gear portion 9b of the geared rotation transmitting member 9. In this embodiment, a crown gear is used as the gear 23a. Fore
The cas ring 6 is rotatably held by the holding cylinder 12 and the rotation transmission member 9 with gears. The end surface of the vibration wave motor on the rotor 21 side is a roller of the rotation transmission member 9 with gears. It is a turning surface of the -portion 9a. Rotation axis 1 whose rotation surface is orthogonal to the optical axis of the lens fixed to output ring 11
The rotation transmission member 9 with gear rotates around 0.
【０００８】振動波モ−タ−は、不図示の電歪素子が接
着された環状の振動部材であるステ−タ−２０、フェル
トまたはゴム等の振動を吸収するための材質からなる環
状の振動吸収体１９、振動吸収体１９の一方の端面に接
して配置された環状のステ−タ−ガイド５、ステ−タ−
ガイド５をステ−タ−２０側へ押すためのバネ４、バネ
４の押えとなる固定フ−ド１、ステ−タ−２０の回転止
めとなるステ−タ−止め７、ステ−タ−２０の振動によ
って回転するロ−タ−２１等の諸部材によって構成され
ている。ロ−タ−２１、出力リング１１と回転軸１０お
よびギヤ付き回転伝達部材９は一体となってステ−タ−
２０の発生する進行振動波によって光軸を中心とした周
方向に回転する。この時固定フ−ド１と保持筒１２に挟
まれたステ−タ−ガイド５、振動吸収体１９、ステ−タ
−２０、ロ−タ−２１、出力リング１１、回転軸１０、
ギヤ付き回転伝達部材９、フォ−カスリング６は、バネ
４によって加圧挟持されている。このためギヤ付き回転
伝達部材９は、フォ−カスリング６の振動波モ−タ−の
ロ−タ−２１側に圧接され、ロ−タ−２１の回転により
フォ−カスリング６の振動波モ−タ−のロ−タ−２１側
の面を床面として回転軸１０を中心とした周方向に回転
移動する。The vibration wave motor includes a ring-shaped vibration member made of a material for absorbing vibration, such as a stator 20, which is a ring-shaped vibration member to which an electrostrictive element (not shown) is adhered, felt or rubber. An annular stator guide 5 arranged in contact with one end face of the absorber 19 and the vibration absorber 19;
A spring 4 for pushing the guide 5 toward the stator 20, a fixed hood 1 for holding the spring 4, a stator stopper 7 for stopping rotation of the stator 20, and a stator 20 And various members such as a rotor 21 which is rotated by the vibrations. The rotor 21, the output ring 11, the rotary shaft 10, and the rotation transmission member 9 with gears are integrated into a stator.
20 rotates in the circumferential direction around the optical axis by the traveling vibration wave generated. At this time, the stator guide 5, the vibration absorber 19, the stator 20, the rotor 21, the output ring 11, the rotating shaft 10, which are sandwiched between the fixed hood 1 and the holding cylinder 12,
The rotation transmission member 9 with gears and the focus ring 6 are pressed and held by the spring 4. Therefore, the geared rotation transmitting member 9 is pressed against the rotor 21 side of the vibration wave motor of the focus ring 6, and the rotation of the rotor 21 causes the vibration wave motor of the focus ring 6 to rotate. The rotor 21 rotates in the circumferential direction around the rotating shaft 10 with the surface on the side of the rotor 21 as the floor.
【０００９】このギヤ付き回転伝達部材９の回動が、ギ
ヤ付き回転伝達部材９のギヤ部９ｂ、レンズ移動環２３
のギヤ２３ａ、突起部２３ｂ、連結リング溝１３ａを介
して連結リング１３を回転させ、連結リング１３にビス
締結されたスケ−ルレバ−１６と固定筒２４に設けられ
たカム溝によってレンズ鏡室３０とともに固定されたフ
ォ−カスレンズＬ３が光軸方向にコロ１８、２９を介し
て移動して合焦がおこなわれる。The rotation of the geared rotation transmitting member 9 is controlled by the gear portion 9b of the geared rotation transmitting member 9 and the lens moving ring 23.
The connecting ring 13 is rotated via the gear 23a, the projection 23b and the connecting ring groove 13a, and the lens mirror chamber 30 is formed by the scale lever 16 screwed to the connecting ring 13 and the cam groove provided in the fixed cylinder 24. The fixed focus lens L3 moves along the rollers 18 and 29 in the optical axis direction to perform focusing.
【００１０】一方、撮影者によるフォ−カスリング６か
らの合焦動作は、フォ−カスリング６を手動で回転する
時ギヤ付き回転伝達部材９のロ−ラ−部９ａは、フォ−
カスリング６の振動波モ−タ−のロ−タ−２１側に圧接
しておりステ−タ−２０とロ−タ−２１との間の摩擦力
により回転軸１０とギヤ付き回転伝達部材９との間の摩
擦力の方が小さいことからギヤ付き回転伝達部材９が回
転軸１０を中心にして単独で回転する。このギヤ付き回
転伝達部材９の回動が、ギヤ付き回転伝達部材９のギヤ
部９ｂ、レンズ移動環２３のギヤ２３ａ、突起部２３
ｂ、連結リング溝１３ａを介して連結リング１３を回転
させ、連結リング１３にビス締結されたスケ−ルレバ−
１６と固定筒２４に設けられたカム溝によってレンズ鏡
室３０とともに固定されたフォ−カスレンズＬ３が光軸
方向にコロ１、２を介して移動して合焦がおこなわれ
る。On the other hand, when the focusing operation from the focus ring 6 is performed by the photographer, when the focus ring 6 is manually rotated, the roller portion 9a of the rotation transmission member 9 with the gear is moved to the focus position.
The rotating shaft 10 and the geared rotation transmitting member 9 are pressed against the rotor 21 side of the vibration wave motor of the cutting ring 6 by frictional force between the stator 20 and the rotor 21. , The rotation transmission member 9 with the gear rotates alone around the rotation shaft 10. The rotation of the geared rotation transmitting member 9 is controlled by the gear 9 b of the geared rotation transmitting member 9, the gear 23 a of the lens moving ring 23, and the projection 23.
b, the connecting ring 13 is rotated through the connecting ring groove 13a, and the scale lever is screwed to the connecting ring 13;
The focusing lens L3 fixed together with the lens mirror chamber 30 by the cam groove provided in the fixed cylinder 16 and the fixed mirror 24 moves along the rollers 1 and 2 in the optical axis direction to perform focusing.
【００１１】[0011]
【発明の効果】以上説明したように本発明によれば、振
動波モ−タ−を搭載したリヤフォ−カス、またはインナ
−フォ−カスのレンズ鏡筒において、振動波モ−タ−か
らの動力を伝えるための、連結部材のパ−ツ点数を減ら
し、部品形状を複雑にすることなく振動波モ−タ−から
の動力を伝える事ができる。また動力の伝達精度の低下
を抑えることができ、モ−タ−ユニットをコンパクトに
することが可能であり、さらにはレンズ鏡筒の全長をコ
ンパクトにすることが出来る。As described above, according to the present invention, the power from the vibration wave motor is provided in the rear focus or the inner focus lens barrel on which the vibration wave motor is mounted. The number of parts of the connecting member for transmitting power can be reduced, and the power from the vibration wave motor can be transmitted without complicating the shape of the parts. In addition, it is possible to suppress a decrease in power transmission accuracy, to reduce the size of the motor unit, and to reduce the overall length of the lens barrel.
【００１２】なお、本発明の実施例では振動波モ−タ−
を搭載したリヤフォ−カスレンズ鏡筒に適用して説明し
たが、レンズシャッターカメラ、双眼鏡、ビデオカメ
ラ、デジタルカメラ等のリヤフォーカス方式やインナー
フォーカス方式のレンズ鏡筒に適用できる。In the embodiment of the present invention, a vibration wave motor is used.
Although the present invention has been described with reference to a rear focus lens barrel equipped with a lens, the present invention can be applied to a rear focus or inner focus lens barrel such as a lens shutter camera, binoculars, a video camera, and a digital camera.
【図１】本発明の実施例を示すレンズ鏡筒の断面図であ
る。FIG. 1 is a sectional view of a lens barrel showing an embodiment of the present invention.
【図２】ギヤ付き回転伝達部材付近を示す拡大断面図で
ある。FIG. 2 is an enlarged sectional view showing the vicinity of a rotation transmission member with gears.
１ 固定フ−ド ２ レンズ押え ３ レンズ鏡室 ４ バネ ５ ステ−タ−ガイド ６ フォ−カスリング ７ ステ−タ−止め ９ ギヤ付き回転伝達部材 １０ 回転軸 １１ 出力リング １２ 保持筒 １３ 連結リング １４ 連結リング押え １６ スケ−ルレバ− １７ マウント １８ コロ １９ 振動吸収体 ２０ ステ−タ− ２１ ロ−タ− ２２ レンズ移動環押え ２３ レンズ移動環 ２４ 固定筒 ２５ レンズ押え ２９ コロ ３０ レンズ鏡室 ３１ レンズ押え DESCRIPTION OF SYMBOLS 1 Fixed hood 2 Lens holder 3 Lens mirror room 4 Spring 5 Stator guide 6 Focus ring 7 Stator stop 9 Gear rotation transmission member 10 Rotary shaft 11 Output ring 12 Holding cylinder 13 Connection ring 14 Connection Ring retainer 16 Scale lever 17 Mount 18 Roller 19 Vibration absorber 20 Stator 21 Rotor 22 Lens movable ring retainer 23 Lens movable ring 24 Fixed cylinder 25 Lens retainer 29 Roller 30 Lens mirror 31 Lens retainer
Claims (1)
ーターを有するレンズ鏡筒において、レンズの光軸と同
心方向に位置する振動波モ−タ−のステ−タ−をフロン
ト側から加圧挟持し、出力リングを有するローターをマ
ウント側に配置した事を特徴とするレンズ鏡筒。1. A lens barrel having a vibration wave motor composed of a stator and a rotor, wherein a stator of a vibration wave motor positioned concentrically with an optical axis of a lens is pressed and clamped from a front side, A lens barrel in which a rotor having an output ring is arranged on a mount side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10239452A JP2000056203A (en) | 1998-08-12 | 1998-08-12 | Lens barrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10239452A JP2000056203A (en) | 1998-08-12 | 1998-08-12 | Lens barrel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000056203A true JP2000056203A (en) | 2000-02-25 |
Family
ID=17044985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10239452A Pending JP2000056203A (en) | 1998-08-12 | 1998-08-12 | Lens barrel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000056203A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02807A (en) * | 1988-01-12 | 1990-01-05 | Olympus Optical Co Ltd | Lens barrel |
| JPH02253212A (en) * | 1989-03-28 | 1990-10-12 | Canon Inc | Lens barrel |
| JPH10115760A (en) * | 1997-11-26 | 1998-05-06 | Olympus Optical Co Ltd | Lens barrel |
| JPH10160998A (en) * | 1996-11-29 | 1998-06-19 | Sigma Corp | Lens barrel |
| JPH10288728A (en) * | 1997-04-16 | 1998-10-27 | Nikon Corp | Lens barel |
| JPH10319298A (en) * | 1997-05-15 | 1998-12-04 | Nikon Corp | Lens barrel incorporating motor |
-
1998
- 1998-08-12 JP JP10239452A patent/JP2000056203A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02807A (en) * | 1988-01-12 | 1990-01-05 | Olympus Optical Co Ltd | Lens barrel |
| JPH02253212A (en) * | 1989-03-28 | 1990-10-12 | Canon Inc | Lens barrel |
| JPH10160998A (en) * | 1996-11-29 | 1998-06-19 | Sigma Corp | Lens barrel |
| JPH10288728A (en) * | 1997-04-16 | 1998-10-27 | Nikon Corp | Lens barel |
| JPH10319298A (en) * | 1997-05-15 | 1998-12-04 | Nikon Corp | Lens barrel incorporating motor |
| JPH10115760A (en) * | 1997-11-26 | 1998-05-06 | Olympus Optical Co Ltd | Lens barrel |
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