JP3248540B2 - Lens barrel - Google Patents
Lens barrelInfo
- Publication number
- JP3248540B2 JP3248540B2 JP07806893A JP7806893A JP3248540B2 JP 3248540 B2 JP3248540 B2 JP 3248540B2 JP 07806893 A JP07806893 A JP 07806893A JP 7806893 A JP7806893 A JP 7806893A JP 3248540 B2 JP3248540 B2 JP 3248540B2
- Authority
- JP
- Japan
- Prior art keywords
- lens
- lens barrel
- diaphragm device
- frame
- screwed
- 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
Description
【０００１】[0001]
【産業上の利用分野】本発明はレンズ鏡胴に係り、特に
レンズ鏡胴に於ける絞り装置の取付構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens barrel, and more particularly, to a mounting structure of a diaphragm device in the lens barrel.
【０００２】[0002]
【従来の技術】カメラのレンズ鏡胴は、諸元の異なるレ
ンズ（例えば、焦点距離等が異なるレンズ）に応じて、
レンズ鏡胴に於ける絞り枠の位置が決定される為、レン
ズ鏡胴は使用するレンズ毎に絞り枠が取付け位置を変え
て固定されている。2. Description of the Related Art A lens barrel of a camera is provided with lenses having different specifications (for example, lenses having different focal lengths).
Since the position of the aperture frame in the lens barrel is determined, the lens barrel is fixed by changing the mounting position of the aperture frame for each lens to be used.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、従来の
レンズ鏡胴は、レンズ鏡胴と絞り枠とが一体に形成され
ているので、レンズの諸元に対応した分だけレンズ鏡胴
の種類を揃えなければならないという欠点がある。本発
明はこのような事情に鑑みてなされたもので、諸元の異
なるレンズでもレンズ鏡胴を共通化できるレンズ鏡胴を
提供することを目的とする。However, in the conventional lens barrel, since the lens barrel and the aperture frame are integrally formed, the types of the lens barrels are aligned according to the specifications of the lens. There is a disadvantage that it must be done. The present invention has been made in view of such circumstances, and an object of the present invention is to provide a lens barrel that can use a common lens barrel even for lenses having different specifications.
【０００４】[0004]
【課題を解決するための手段】本発明は、前記目的を達
成するために、鏡胴及び絞り装置が共通で、諸元の異な
るレンズが交換できるレンズ鏡胴に於いて、前記絞り装
置は、前記レンズ鏡胴に対し光軸方向にスライド移動可
能に支持されると共に付勢部材により一方向に付勢さ
れ、前記レンズ鏡胴には、諸元の異なるレンズのレンズ
枠がネジ込まれるネジ部が形成され、前記ネジ部に押さ
え部材をネジ込んで、レンズの諸元に応じた位置に前記
絞り装置が位置するように前記付勢部材の付勢方向に抗
して前記絞り装置をスライド移動させて位置決めするこ
とを特徴としている。According to the present invention, in order to achieve the above-mentioned object, a lens barrel and a diaphragm device are common and different specifications are used.
In the lens barrel in which the lens can be exchanged , the diaphragm device is supported so as to be slidable in the optical axis direction with respect to the lens barrel , and is biased in one direction by a biasing member. The lens of the lens with different specifications
A screw portion into which the frame is screwed is formed, and the frame is pressed against the screw portion.
Screw the mounting member into the position corresponding to the specifications of the lens.
The urging member is opposed to the urging direction so that the diaphragm device is located.
It is characterized and this <br/> for positioning slide to move said throttle device and.
【０００５】[0005]
【作用】本発明によれば、押さえ部材によって絞り装置
を付勢部材の付勢力に抗してスライド移動させ、絞り装
置がレンズに対応した所定位置に位置した時に、前記押
さえ部材をレンズ鏡胴に固定する。これにより、レンズ
の諸元に応じて絞り装置を任意の位置に位置決めでき
る。According to the present invention, when the stop device is slid by the pressing member against the urging force of the urging member, and when the diaphragm device is located at a predetermined position corresponding to the lens, the pressing member is moved to the lens barrel. Fixed to. Thereby, the diaphragm device can be positioned at an arbitrary position according to the specifications of the lens.
【０００６】また、前記押さえ部材をレンズ枠と兼用す
ると、レンズ鏡胴の部品点数を削減できる。Further, when the holding member is also used as a lens frame, the number of parts of the lens barrel can be reduced.
【０００７】[0007]
【実施例】以下添付図面に従って本発明に係るレンズ鏡
胴の好ましい実施例を詳述する。図１は、本発明に係る
レンズ鏡胴１０の第１実施例を示す半断面図である。同
図に示すように前記レンズ鏡胴１０内には、前レンズ枠
アッセンブリ１２、紅彩絞り装置１４、及び後レンズ枠
アッセンブリ１６が光軸１８に沿って順に配置されてい
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the lens barrel according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a half sectional view showing a first embodiment of a lens barrel 10 according to the present invention. As shown in FIG. 1, a front lens frame assembly 12, an iris diaphragm device 14, and a rear lens frame assembly 16 are sequentially arranged in the lens barrel 10 along an optical axis 18.
【０００８】前記前レンズ枠アッセンブリ１２は、レン
ズ２０が前レンズ枠２２に保持されて構成されると共
に、前レンズ枠２２の外側に配設された鏡胴本体２４の
図中左端部にネジ結合されることにより位置決めされ
る。前記紅彩絞り装置１４は、絞り羽根２６を複数枚有
し、これらの絞り羽根２６は菊座２８と絞り枠３０との
間で光軸１８と直交する方向に揺動自在に支持されてい
る。また、絞り羽根２６は、前記絞り枠３０に突設され
た制限ピン３２から伝達される回転力により揺動し、絞
り孔径を拡縮することができる。The front lens frame assembly 12 has a lens 20 held by the front lens frame 22 and is screwed to a left end portion of a lens barrel main body 24 disposed outside the front lens frame 22 in the drawing. It is positioned by being performed. The iris diaphragm device 14 has a plurality of diaphragm blades 26, and these diaphragm blades 26 are supported between a chrysanthemum seat 28 and a diaphragm frame 30 so as to be swingable in a direction orthogonal to the optical axis 18. . Further, the aperture blade 26 swings by the rotational force transmitted from the restriction pin 32 protruding from the aperture frame 30, and can enlarge or reduce the aperture hole diameter.
【０００９】この紅彩絞り装置１４は、前記鏡胴本体２
４内に配置される。また、前記制限ピン３２が紅彩絞り
装置１４と一緒に光軸１８と平行に移動可能、及び絞り
孔径調節のために回動可能とするための溝３４、３８が
鏡胴本体２４、３６に設けてある。制限ピン３２は絞り
リング３９の溝に係合され、絞りリング３９を回動する
ことにより、絞り孔径が調節される。尚、絞り枠３０
は、図示しないキー板を介して鏡胴本体２４に固定され
て回動しない。The iris diaphragm device 14 is provided with the lens barrel main body 2.
4. Grooves 34 and 38 for allowing the limiting pin 32 to move in parallel with the optical axis 18 together with the iris diaphragm device 14 and for rotating the diaphragm hole diameter are provided in the lens barrel bodies 24 and 36. It is provided. The restriction pin 32 is engaged with the groove of the aperture ring 39, and the aperture hole diameter is adjusted by rotating the aperture ring 39. The aperture frame 30
Is fixed to the lens barrel main body 24 via a key plate (not shown) and does not rotate.
【００１０】また、紅彩絞り装置１４は、スプリング４
０の前端部と前記前レンズ枠２２の後端面２２Ａとに挟
まれ、スプリング４０による前方向の付勢力を受ける。
前レンズ枠２２を鏡胴本体２４のネジ部２５にネジ込む
と、前レンズ枠２２の後端面２２Ａによって紅彩絞り装
置１４が図中右（矢印Ａ）方向に移動する。これによ
り、紅彩絞り装置１４を、前レンズ枠２２の後端面２２
Ａによってレンズ２０に対応した所定位置に位置決めす
ることができる。The iris diaphragm device 14 includes a spring 4
0 and the front end of the front lens frame 22 and the front end of the front lens frame 22, and receives a forward biasing force of the spring 40.
When the front lens frame 22 is screwed into the threaded portion 25 of the lens barrel main body 24, the iris diaphragm device 14 moves rightward (arrow A) in the drawing by the rear end surface 22A of the front lens frame 22. Thereby, the iris diaphragm device 14 is moved to the rear end surface 22 of the front lens frame 22.
A allows positioning at a predetermined position corresponding to the lens 20.
【００１１】前記後レンズ枠アッセンブリ１６は、レン
ズ群４２が後レンズ枠５０に保持されて構成されると共
に、後レンズ枠５０が前記鏡胴本体２４の図中右端部に
ネジ結合されることにより位置決めされる。一方、前記
鏡胴本体２４の外側にはヘリコイド環５２がネジ結合さ
れ、また、このヘリコイド環５２はフォーカス環５４に
ネジピン５６によって固定されている。前記フォーカス
環５４を光軸１８を中心に正転・反転させると、ヘリコ
イド環５２がフォーカス環５４に伴って回転し、そし
て、ヘリコイド環５２にネジ結合されている前記鏡胴本
体２４がネジの作用により光軸１８に沿って前後移動す
る。これにより、前レンズ枠アッセンブリ１２、紅彩絞
り装置１４、後レンズ枠アッセンブリ１６は、各々の位
置関係を保持した状態で光軸１８に沿って前後移動し、
焦点合わせを行う。尚、前記鏡胴本体２４は、鏡胴本体
２４の右端部にネジ５８によって固定されたガイド板６
０が鏡胴本体３６に形成したガイド溝６２にガイドされ
ているので、前後移動時に回転することはない。The rear lens frame assembly 16 is configured such that the lens group 42 is held by the rear lens frame 50 and the rear lens frame 50 is screwed to the right end of the lens barrel main body 24 in the drawing. Positioned. On the other hand, a helicoid ring 52 is screwed to the outside of the lens barrel main body 24, and the helicoid ring 52 is fixed to a focus ring 54 by a screw pin 56. When the focus ring 54 is rotated forward / reversed around the optical axis 18, the helicoid ring 52 rotates with the focus ring 54, and the lens barrel main body 24 screwed to the helicoid ring 52 is screwed. It moves back and forth along the optical axis 18 by the action. As a result, the front lens frame assembly 12, the iris diaphragm device 14, and the rear lens frame assembly 16 move back and forth along the optical axis 18 while maintaining their respective positional relationships,
Perform focusing. The lens barrel main body 24 is provided with a guide plate 6 fixed to a right end of the lens barrel main body 24 by a screw 58.
Since 0 is guided by the guide groove 62 formed in the lens barrel main body 36, it does not rotate when moving back and forth.
【００１２】このように構成された第１実施例に係るレ
ンズ鏡胴１０によれば、前レンズ枠アッセンブリ１２の
取り付け時に、前レンズ枠２２を鏡胴本体２４にネジ込
んでいくと、前レンズ枠２２の後端面２２Ａが紅彩絞り
装置１４の絞り枠３０の端面３０Ａに当接する。そし
て、紅彩絞り装置１４は、前レンズ枠２２のネジ込みに
よる移動により後端面２２Ａで右方向に押され、スプリ
ング４０の付勢力に抗してスライド移動する。According to the lens barrel 10 according to the first embodiment, the front lens frame 22 is screwed into the lens barrel body 24 when the front lens frame assembly 12 is mounted. The rear end face 22A of the frame 22 contacts the end face 30A of the aperture frame 30 of the iris diaphragm device 14. Then, the iris diaphragm device 14 is pushed rightward on the rear end face 22 </ b> A by the screwing of the front lens frame 22, and slides against the urging force of the spring 40.
【００１３】そして、紅彩絞り装置１４は、前レンズ枠
２２を鏡胴本体２４に位置決めした時に、前レンズ枠２
２とスプリング４０とに挟まれてレンズ２０に対応した
所定位置に位置決めされる。これにより、本実施例で
は、前レンズ枠２２の後端面２２Ａの位置をレンズの諸
元に応じて変えることにより、紅彩絞り装置１４の位置
を変えることができる。従って、レンズの諸元に応じて
絞り装置を任意の位置に位置決めすることができる。The iris diaphragm device 14 moves the front lens frame 2 when the front lens frame 22 is positioned on the lens barrel main body 24.
It is positioned at a predetermined position corresponding to the lens 20 by being sandwiched between the lens 2 and the spring 40. Thus, in the present embodiment, the position of the iris diaphragm device 14 can be changed by changing the position of the rear end face 22A of the front lens frame 22 according to the specifications of the lens. Therefore, the diaphragm device can be positioned at an arbitrary position according to the specifications of the lens.
【００１４】図２は、本発明に係るレンズ鏡胴７０の第
２実施例を示す半断面図であり、図１で示した第１実施
例と同一、若しくは類似の部材については同一の符号を
付し、その説明は省略する。第２実施例は、図１に示し
たレンズ２０とは諸元の異なるレンズ７２を使用したも
ので、前レンズ枠７４の固定位置を変えることにより紅
彩絞り装置１４の位置をレンズ７２に対応した位置に位
置決めすることができる。FIG. 2 is a half sectional view showing a second embodiment of the lens barrel 70 according to the present invention, and the same or similar members as those of the first embodiment shown in FIG. And description thereof is omitted. In the second embodiment, a lens 72 having different specifications from the lens 20 shown in FIG. 1 is used. By changing the fixed position of the front lens frame 74, the position of the iris diaphragm device 14 corresponds to the lens 72. It can be positioned at the specified position.
【００１５】従って、第１、第２実施例によれば、諸元
の異なるレンズを使用する場合でも、そのレンズ枠以外
の部品を共通化できるので、コストダウンが図れると共
にレンズ系の設計に負担をかけなくて済む。尚、第１、
及び第２本実施例では、前レンズ枠２２、７４で紅彩絞
り装置１４を押して位置決めするようにしたが、これに
限られるものではなく、後レンズ枠５０で紅彩絞り装置
１４を押して位置決めしても良い。Therefore, according to the first and second embodiments, even when lenses having different specifications are used, parts other than the lens frame can be used in common, so that the cost can be reduced and the design of the lens system is burdensome. You don't have to. The first,
In the second embodiment, the iris diaphragm device 14 is pushed by the front lens frames 22 and 74 for positioning. However, the present invention is not limited to this, and the iris diaphragm device 14 is pushed by the rear lens frame 50 and positioned. You may.
【００１６】また、第１、及び第２本実施例では、前レ
ンズ枠２２、７４を押さえ部材として紅彩絞り装置１４
を位置決めするようにしたが、これに限られるものでは
なく、図３に示すようにネジ環７６を押さえ部材として
絞り枠３０の端面３０Ａを押して紅彩絞り装置１４を位
置決めするようにしても良い。更に、本実施例では、絞
り装置として紅彩絞り装置１４を用いたが、これに限ら
れるものではなく、他の方式の絞り装置でも良い。In the first and second embodiments, the iris diaphragm device 14 is formed by using the front lens frames 22 and 74 as pressing members.
However, the present invention is not limited to this, and the iris diaphragm device 14 may be positioned by pressing the end surface 30A of the diaphragm frame 30 using the screw ring 76 as a pressing member as shown in FIG. . Further, in the present embodiment, the iris diaphragm device 14 is used as the diaphragm device, but the present invention is not limited to this, and another type of diaphragm device may be used.
【００１７】[0017]
【発明の効果】以上説明したように本発明に係るレンズ
鏡胴によれば、押さえ部材によって絞り装置を付勢部材
の付勢力に抗してスライド移動させ、絞り装置が所定位
置に位置した時に、前記押さえ部材をレンズ鏡胴に固定
するようにしたので、レンズの諸元に応じて絞り装置を
任意の位置に位置決めできる。As described above, according to the lens barrel of the present invention, the stop device is slid by the pressing member against the urging force of the urging member, so that when the diaphragm device is located at the predetermined position. Since the pressing member is fixed to the lens barrel, the diaphragm device can be positioned at an arbitrary position according to the specifications of the lens.
【００１８】また、前記押さえ部材をレンズ枠と兼用す
ると、レンズ鏡胴の部品点数を削減できる。Further, when the holding member is also used as a lens frame, the number of parts of the lens barrel can be reduced.
【図１】本発明に係るレンズ鏡胴の第１実施例を示す半
断面図FIG. 1 is a half sectional view showing a first embodiment of a lens barrel according to the present invention.
【図２】本発明に係るレンズ鏡胴の第２実施例を示す半
断面図FIG. 2 is a half sectional view showing a second embodiment of the lens barrel according to the present invention;
【図３】本発明に係るレンズ鏡胴の第３実施例を示す半
断面図FIG. 3 is a half sectional view showing a third embodiment of the lens barrel according to the present invention;
１０、７０…レンズ鏡胴 １２…前レンズ枠アッセンブリ １４…紅彩絞り装置 １６…後レンズ枠アッセンブリ ２０、７２…レンズ ２２、７４…前レンズ枠 ２４…鏡胴本体 ７６…ネジ環 10, 70: lens barrel 12: front lens frame assembly 14: iris diaphragm device 16: rear lens frame assembly 20, 72: lens 22, 74: front lens frame 24: lens barrel body 76: screw ring
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平４−331937（ＪＰ，Ａ) 実開 昭59−121611（ＪＰ，Ｕ) 実開 平２−17705（ＪＰ，Ｕ) 実開 平２−138732（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) G02B 7/02 - 7/105 ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-4-331937 (JP, A) JP-A-59-121611 (JP, U) JP-A-2-17705 (JP, U) JP-A-2,705 138732 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) G02B 7 /02-7/105
Claims (2)
るレンズが交換できるレンズ鏡胴に於いて、 前記絞り装置は、前記レンズ鏡胴に対し光軸方向にスラ
イド移動可能に支持されると共に付勢部材により一方向
に付勢され、前記レンズ鏡胴には、諸元の異なるレンズのレンズ枠が
ネジ込まれるネジ部が形成され、 前記ネジ部に押さえ部材をネジ込んで、レンズの諸元に
応じた位置に前記絞り装置が位置するように前記付勢部
材の付勢方向に抗して前記絞り装置をスライド移動させ
て位置決めする ことを特徴とするレンズ鏡胴。(1) The lens barrel and the diaphragm device are common and have different specifications.
In the lens barrel in which the lens can be exchanged , the diaphragm device is supported so as to be slidable in the optical axis direction with respect to the lens barrel , and is biased in one direction by a biasing member. Has a lens frame of a lens with different specifications
A screw part to be screwed in is formed, and a holding member is screwed into the screw part, so that the lens
The urging unit so that the diaphragm device is located at a corresponding position.
Slide the squeezing device against the urging direction of the material.
A lens barrel characterized in that the lens barrel is positioned by positioning .
まれるレンズ枠と兼用されていることを特徴とする請求
項１記載のレンズ鏡胴。2. The pressing member is screwed into the screw portion.
2. The lens barrel according to claim 1, wherein the lens barrel is also used as a lens frame to be inserted .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07806893A JP3248540B2 (en) | 1993-04-05 | 1993-04-05 | Lens barrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07806893A JP3248540B2 (en) | 1993-04-05 | 1993-04-05 | Lens barrel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06289269A JPH06289269A (en) | 1994-10-18 |
| JP3248540B2 true JP3248540B2 (en) | 2002-01-21 |
Family
ID=13651535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP07806893A Expired - Fee Related JP3248540B2 (en) | 1993-04-05 | 1993-04-05 | Lens barrel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3248540B2 (en) |
-
1993
- 1993-04-05 JP JP07806893A patent/JP3248540B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06289269A (en) | 1994-10-18 |
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