JP2020086101A - Lens barrel - Google Patents

Lens barrel Download PDF

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JP2020086101A
JP2020086101A JP2018219544A JP2018219544A JP2020086101A JP 2020086101 A JP2020086101 A JP 2020086101A JP 2018219544 A JP2018219544 A JP 2018219544A JP 2018219544 A JP2018219544 A JP 2018219544A JP 2020086101 A JP2020086101 A JP 2020086101A
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lens barrel
nut member
diaphragm plate
peripheral surface
fixed diaphragm
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JP7112059B2 (en
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和光 竹澤
Kazumitsu Takezawa
和光 竹澤
宗一郎 内川
Soichiro Uchikawa
宗一郎 内川
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Vs Tech Co Ltd
VS TECHNOLOGY CO Ltd
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Vs Tech Co Ltd
VS TECHNOLOGY CO Ltd
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Abstract

To provide a lens barrel that can prevent looseness between the lens barrel and camera main body due to oscillation, and looseness of an exchangeable stationary diaphragm plate housed in the lens barrel.SOLUTION: A lens barrel 1, which is configured so as to be mountable and demountable to and from a camera main body, is composed of a first lens barrel 10 and second lens barrel 20 that are threadedly engaged to be integral. The first lens barrel 10 is composed of: a main body part; and a nut member 13 and stationary ring 14 that are peripherally provided in a movable state where the nut member and stationary ring are threadedly engaged in an outer periphery. A double nut effect of the nut member 13 and the stationary ring 14 prevents looseness between the camera main body 2 and the lens barrel 1. In the nut member 13, an outer periphery shape is a hexagon barrel or octagon barrel, which is engageable with a torque wrench abutted. Further, an exchangeable stationary diaphragm plate 3 is screwed to the second lens barrel 20 and fixed. Accordingly, there is no looseness due to oscillation in both the lens barrel 1 and stationary diaphragm plate 3.SELECTED DRAWING: Figure 1

Description

本願発明は、カメラ本体に着脱可能なレンズ鏡筒、特に、固定絞り板を着脱可能に内設して交換可能としたレンズ鏡筒に関する。 The present invention relates to a lens barrel that is detachably attached to a camera body, and more particularly to a lens barrel that has a fixed diaphragm plate detachably installed therein and is replaceable.

固定絞り板は、撮影場所の明るさの違いによりカメラの撮影条件を一定の範囲内とするため、レンズ鏡筒にレンズと併用して用いられる。また、フォーカス調整時の収差変動を抑えるため、2以上のレンズ群で構成されるレンズ鏡筒では、固定絞り板をレンズ群の間に配置することが行われている(特許文献1)。
一方、工場内での検査ラインや製造ラインロボットの位置検知、セキュリティー対策等の用途のために建物の屋内、屋外にカメラを設置することが行われている。このようなカメラは、定期点検、更新のためにレンズ鏡筒を着脱できるように構成されている。
また、このように建物の屋内、屋外に長年固定されて使用されるカメラに装着されるレンズ鏡筒は振動などにより、レンズ鏡筒とカメラ本体のゆるみ、レンズ鏡筒に収納されている固定絞り板のゆるみが生じてカメラ機能の低下をもたらす。
このため、振動によるレンズ鏡筒自体のゆるみを防ぐため、レンズ鏡筒にナット部材を設けることが行われている(特許文献2)。しかし、レンズ鏡筒に収納されている固定絞り板については、振動防止を検討されていない。
The fixed diaphragm plate is used in combination with the lens in the lens barrel in order to keep the photographing condition of the camera within a certain range depending on the brightness of the photographing place. Further, in order to suppress variation in aberration during focus adjustment, in a lens barrel composed of two or more lens groups, a fixed diaphragm plate is arranged between the lens groups (Patent Document 1).
On the other hand, cameras have been installed indoors and outdoors in buildings for purposes such as inspection line detection in manufacturing plants, position detection of manufacturing line robots, and security measures. Such a camera is configured so that the lens barrel can be attached and detached for regular inspection and renewal.
In addition, the lens barrel mounted on a camera that has been used indoors or outdoors in a building for many years in such a manner causes the lens barrel and camera body to loosen due to vibration, and the fixed aperture housed in the lens barrel. The loosening of the board causes the camera function to deteriorate.
Therefore, in order to prevent the lens barrel from loosening due to vibration, a nut member is provided on the lens barrel (Patent Document 2). However, vibration prevention has not been studied for the fixed diaphragm plate housed in the lens barrel.

しかしながら、レンズ鏡筒に着脱可能に内設して交換可能とされる固定絞り板についても、屋外や屋内に長年固定されて様々な振動を受けるカメラの場合には、カメラ本体はもとより、カメラ本体に装着されるレンズ鏡筒にも、カメラ鏡筒内部の部品同士が擦れ、粉塵が発生して画像ノイズの原因となる。 However, even for fixed diaphragm plates that are detachably installed inside the lens barrel and can be replaced, in the case of a camera that has been fixed outdoors or indoors for many years and receives various vibrations, not only the camera body but also the camera body Also in the lens barrel mounted on the camera barrel, parts inside the camera barrel rub against each other and dust is generated, which causes image noise.

特開平9−127395号公報JP, 9-127395, A 特開2015−2326875号公報JP, 2015-2326875, A

本願発明は、レンズ鏡筒に着脱可能に内設して交換可能とされる固定絞り板のゆるみを防止できるレンズ鏡筒を提供することにある。 An object of the present invention is to provide a lens barrel capable of preventing loosening of a fixed diaphragm plate which is detachably installed in the lens barrel and is replaceable.

本願発明の課題は、以下の態様(1)乃至(4)により解決できる。具体的には、 The problems of the present invention can be solved by the following aspects (1) to (4). In particular,

(態様1) カメラ本体に着脱可能となるように構成されたレンズ鏡筒であって、前記レンズ鏡筒は、被写体の像を結合させる複数のレンズが光軸を一致させた状態で配置され、螺合して一体となる第1レンズ鏡筒と第2レンズ鏡筒で構成され、前記第1レンズ鏡筒は、本体部と、本体部の外周に螺合して移動可能な状態で周設されたナット部材及び固定リングで構成され、前記本体部は、基端側外周面にナット部材及び固定リングを回転移動するため雄ネジ部と、先端側内周面に前記第2レンズ鏡筒を螺合可能な雌ネジ部を備え、前記ナット部材は、移動して前記カメラ本体と当接することによりカメラ本体と前記第1レンズ鏡筒との相対回転を抑制するように構成され、前記固定リングは、移動してナット部材と当接することにより、前記ナット部材の回転を抑制するように構成され、前記第2レンズ鏡筒は、基端側外周面に固定絞り板を螺合可能な雄ネジ部と、中央に前記第1レンズ鏡筒に螺合可能な雄ネジ部を備え、前記固定絞り板は、前記第2レンズ鏡筒から取り外すことにより交換可能に構成された、ことを特徴とするレンズ鏡筒である。
レンズ鏡筒を螺合して一体となる第1レンズ鏡筒と第2レンズ鏡筒の構成にすることにより、レンズ鏡筒の固定絞り板を撮像条件に合わせて交換することができる。
また、第2レンズ鏡筒の基端側に固定絞り板を螺合可能な外ネジ部を設けることで、固定絞り板を第2レンズ鏡筒の基端側に螺合して装着することができる。これにより、固定絞り板は中心軸精度が向上するとともに、振動によるゆるみを防止することができる。
さらに、第1レンズ鏡筒本体の外周部にカメラ本体と当接することによりカメラ本体とレンズ鏡筒との相対回転を抑制するように構成されたナット部材により、レンズ鏡筒とカメラ本体の接合が強固になる。さらに、固定リングによる締め付けによるダブルナット構成により、接合の度合いはさらにますことになる。
(Aspect 1) A lens barrel configured to be attachable to and detachable from a camera body, wherein the lens barrel is arranged in a state where a plurality of lenses for combining images of a subject are aligned in optical axes, It is composed of a first lens barrel and a second lens barrel which are screwed together to form a unit, and the first lens barrel is provided around a main body and an outer circumference of the main body so as to be movable and screwed. The main body has a male screw portion for rotating and moving the nut member and the fixing ring on the outer peripheral surface on the base end side, and the second lens barrel on the inner peripheral surface on the tip end side. The nut member is provided with a screwable female screw portion, and the nut member is configured to move and abut against the camera body to suppress relative rotation between the camera body and the first lens barrel. Is configured to suppress rotation of the nut member by moving and contacting the nut member, and the second lens barrel is a male screw capable of screwing a fixed diaphragm plate on the outer peripheral surface on the base end side. And a male screw portion in the center that can be screwed into the first lens barrel, and the fixed diaphragm plate is configured to be replaceable by removing it from the second lens barrel. It is a lens barrel.
The fixed diaphragm plate of the lens barrel can be replaced according to the imaging conditions by forming the first lens barrel and the second lens barrel that are integrated by screwing the lens barrel.
Further, by providing an outer threaded portion capable of screwing the fixed diaphragm plate on the base end side of the second lens barrel, the fixed diaphragm plate can be screwed and mounted on the base end side of the second lens barrel. it can. This improves the accuracy of the central axis of the fixed diaphragm plate and prevents loosening due to vibration.
Further, the lens barrel and the camera body are joined by a nut member configured to suppress relative rotation between the camera body and the lens barrel by contacting the outer peripheral portion of the first lens barrel body with the camera body. Become stronger. In addition, the double nut construction by tightening with the fixing ring further increases the degree of joining.

(態様2) 前記ナット部材は、外周形状がトルクレンチを当接して嵌合可能な六角筒または八角筒であることを特徴とする(態様1)に記載したレンズ鏡筒である。
ナット部材の外周形状をトルクレンチが当接して嵌合可能な辺長の異なる六角筒とすることでナットの締め付けトルクを大きくすることができる。これにより、レンズ鏡筒とカメラ本体の接合が強固になる。
(Mode 2) The lens barrel described in (Mode 1) is characterized in that the nut member is a hexagonal cylinder or an octagonal cylinder capable of being fitted by abutting a torque wrench.
The nut tightening torque can be increased by forming the outer peripheral shape of the nut member into a hexagonal cylinder having different side lengths with which the torque wrench can abut and fit. This strengthens the joint between the lens barrel and the camera body.

(態様3) 前記固定絞り板は、内周面にネジ加工、外周面に滑り防止加工が施されていることを特徴とする(態様1)または(態様2)のいずれかに記載したレンズ鏡筒である。
固定絞り板の内面がネジ加工されていることで、固定絞り板を第2レンズ鏡筒に螺合して装着できる。これにより、固定絞り板は中心軸精度が向上するとともに、振動によるゆるみを防止することができる。
さらに、
(Aspect 3) The lens mirror according to any one of (Aspect 1) and (Aspect 2), characterized in that the fixed diaphragm plate has an inner peripheral surface screw-processed and an outer peripheral surface anti-slip processed. It is a cylinder.
Since the inner surface of the fixed diaphragm plate is threaded, the fixed diaphragm plate can be screwed and mounted on the second lens barrel. This improves the accuracy of the central axis of the fixed diaphragm plate and prevents loosening due to vibration.
further,

(態様4) 前記固定絞り板は、絞り開口の異なる複数の取り替え用固定絞り板を備えたことを特徴とする(態様1)〜(態様3)のいずれかに記載したレンズ鏡筒である。
固定絞り板は、螺合して脱着できて交換可能である。このため、絞り開口の異なる取り替え用固定絞り板を備えることにより、カメラの設置場所の明るさにより適宜対応できるからである。
(Aspect 4) The lens barrel according to any one of (Aspect 1) to (Aspect 3), wherein the fixed aperture plate includes a plurality of replacement fixed aperture plates having different aperture openings.
The fixed aperture plate can be replaced by screwing it on and off. Therefore, by providing replacement fixed diaphragm plates having different diaphragm apertures, it is possible to appropriately cope with the brightness of the installation location of the camera.

本願発明によれば、トルクレンチが当接可能なナット部材を用いて、ナット部材によるレンズ鏡筒のカメラ本体への接合効果を大きくでき、交換可能な固定絞り板をレンズ鏡筒内で螺合することで、固定絞り板の装着効果が大きくなる。これにより、振動によるレンズ鏡筒とカメラ本体のゆるみ、レンズ鏡筒に着脱可能に内設して交換可能とされる固定絞り板のゆるみを防止できるレンズ鏡筒を提供することにある。 According to the present invention, by using the nut member with which the torque wrench can come into contact, the effect of joining the lens barrel to the camera body by the nut member can be increased, and the replaceable fixed diaphragm plate is screwed in the lens barrel. By doing so, the effect of mounting the fixed diaphragm plate becomes large. Accordingly, it is an object of the present invention to provide a lens barrel that can prevent loosening of the lens barrel and the camera body due to vibration and loosening of a fixed diaphragm plate that is detachably installed in the lens barrel and can be replaced.

本願発明のレンズ鏡筒の構成の一例を示す分解斜視図である。It is an exploded perspective view showing an example of composition of a lens barrel of the present invention. 本願発明のレンズ鏡筒の構成の一例を示す端面図である。It is an end view which shows an example of a structure of the lens barrel of this invention. 本願発明のレンズ鏡筒の構成の一例を示す分解端面図である。It is an exploded end view showing an example of composition of a lens barrel of the present invention. 本願発明のレンズ鏡筒のトルクレンチを当接して嵌合可能な六角筒形態のナット部材を示す斜視図である。It is a perspective view showing a nut member of a hexagonal cylinder form which a torque wrench of a lens barrel of the present invention can contact and can fit. 本願発明のレンズ鏡筒のトルクレンチを当接して嵌合可能なナット部材の六角筒及び八角筒の態様を示す端面図である。It is an end view which shows the aspect of the hexagonal cylinder and octagonal cylinder of the nut member which the torque wrench of the lens barrel of this invention can contact|abut and can fit. 本願発明のレンズ鏡筒をカメラ本体にトルクレンチを用いて締め付け調整する態様を示す写真である。It is a photograph which shows the mode which tightens and adjusts the lens barrel of the present invention to a camera body using a torque wrench.

本願発明を実施するための形態を図1〜図6に基づいて説明する。ただし、図1〜図6は実施形態の一例であり、これに限定されるものではない。 Modes for carrying out the present invention will be described with reference to FIGS. However, FIGS. 1 to 6 are examples of the embodiment, and the present invention is not limited to this.

1.レンズ鏡筒
本願発明のレンズ鏡筒1は、カメラ本体2に脱着可能となるように構成したものである。また、振動によるレンズ鏡筒1とカメラ本体2のゆるみ、レンズ鏡筒1に収納されている固定絞り板4のゆるみを防止できるように構成したものである。
本願発明のレンズ鏡筒1は、図1、図2、図3に示すように、被写体の像を結合させる複数のレンズ群A,Aが光軸方向Bを一致させた状態で配置されている。レンズ鏡筒1は、螺合して一体となる第1レンズ鏡筒10と第2レンズ鏡筒20で構成されている。第1レンズ鏡筒10と第2レンズ鏡筒20を嵌合させて一体のレンズ鏡筒1とする構成によって、固定絞り板4をレンズ鏡筒1内部に組み込むことができる。被写体の撮影条件によって固定絞り板を適宜交換できる。
固定絞り板4を第1レンズ鏡筒に収納されているレンズ群(A)と第2レンズ鏡筒に収納されているレンズ群(A)の間に配することにより、フォーカス調整時の収差変動を抑えることができる。
1. Lens barrel The lens barrel 1 of the present invention is configured to be detachable from the camera body 2. Further, the lens barrel 1 and the camera body 2 are prevented from loosening due to vibration and the fixed diaphragm plate 4 housed in the lens barrel 1 is prevented from loosening.
As shown in FIGS. 1, 2, and 3, the lens barrel 1 of the present invention is arranged in a state in which a plurality of lens groups A 1 and A 2 for combining images of a subject are aligned in the optical axis direction B. ing. The lens barrel 1 is composed of a first lens barrel 10 and a second lens barrel 20 which are screwed together to be integrated. With the configuration in which the first lens barrel 10 and the second lens barrel 20 are fitted to each other to form the integrated lens barrel 1, the fixed diaphragm plate 4 can be incorporated inside the lens barrel 1. The fixed diaphragm plate can be appropriately replaced depending on the shooting conditions of the subject.
By disposing the fixed diaphragm plate 4 between the lens group (A 1 ) housed in the first lens barrel and the lens group (A 2 ) housed in the second lens barrel, focus adjustment is performed. Aberration variation can be suppressed.

2.第1レンズ鏡筒
本願発明の第1レンズ鏡筒10は、基端側外周面にナット部材13及び固定リング14を回転移動するため雄ネジ部11が設けられている。また、先端側内周面に第2レンズ鏡筒を螺合可能な雌ネジ部12を備えている。また、先端側は第2レンズ鏡筒20の基端側が嵌合できる構造になっている。ここで、基端側とは、光軸方向Bに沿った一方の端をいい、先端とは、光軸方向Bに沿った他方の端をいう。
さらに、外周部にはカメラ本体2と当接することによりカメラ本体2と第1レンズ鏡筒10との相対回転を抑制するためのナット部材13を備え、併せてナット部材13のゆるみを防ぐための固定リング14も備えている。
ナット部材13及び固定リング14は、第1レンズ鏡筒の外周に沿って回転移動できる。このため、第1レンズ鏡筒10の外周面に備えられた雄ネジ部11に対応して、ナット部材13の内側に雌ネジ部15、固定リング14の内側にも雌ネジ部16が備えている。
2. First Lens Barrel The first lens barrel 10 of the present invention is provided with a male screw portion 11 on the outer peripheral surface of the base end side for rotationally moving the nut member 13 and the fixing ring 14. Further, a female screw portion 12 into which the second lens barrel can be screwed is provided on the inner peripheral surface on the tip side. Further, the distal end side has a structure in which the proximal end side of the second lens barrel 20 can be fitted. Here, the base end side refers to one end along the optical axis direction B, and the tip end refers to the other end along the optical axis direction B.
Further, a nut member 13 for suppressing relative rotation between the camera body 2 and the first lens barrel 10 by being brought into contact with the camera body 2 is provided on the outer peripheral portion, and at the same time, for preventing the nut member 13 from loosening. A fixing ring 14 is also provided.
The nut member 13 and the fixing ring 14 can rotate and move along the outer periphery of the first lens barrel. Therefore, a female screw portion 15 is provided inside the nut member 13 and a female screw portion 16 is also provided inside the fixing ring 14 corresponding to the male screw portion 11 provided on the outer peripheral surface of the first lens barrel 10. There is.

3.ナット部材
本願発明の第1レンズ鏡筒10の外周部に備えられたナット部材13は、基端側外周面にカメラ本体2と螺合可能な雄ネジ部17を備えている。また、図4、図5、図6に示すように、外周形状がトルクレンチを当接して嵌合可能な六角筒(図5(a))または八角筒(図5(b))である。トルクレンチを当接可能な外周形とすることで、締め付けやすく、トルク管理が可能である。これにより、振動によるレンズ鏡筒1とカメラ本体2のゆるみを適切に管理できる。
3. Nut Member The nut member 13 provided on the outer peripheral portion of the first lens barrel 10 of the present invention has a male screw portion 17 that can be screwed with the camera body 2 on the outer peripheral surface on the proximal end side. In addition, as shown in FIGS. 4, 5, and 6, the outer peripheral shape is a hexagonal cylinder (FIG. 5A) or an octagonal cylinder (FIG. 5B) into which a torque wrench can abut and fit. The torque wrench has an outer peripheral shape that can be abutted, so that tightening is easy and torque can be managed. This makes it possible to properly manage looseness of the lens barrel 1 and the camera body 2 due to vibration.

4.固定リング
本願発明の固定リング14は、ナット部材13の振動によるゆるみを防止するために、第1レンズ鏡筒10の外周に備えられている。いわゆるダブルナット効果の役割を担う。
4. Fixing Ring The fixing ring 14 of the present invention is provided on the outer periphery of the first lens barrel 10 in order to prevent the nut member 13 from loosening due to vibration. It plays the role of the so-called double nut effect.

5.第2レンズ鏡筒
本願発明の第2レンズ鏡筒20は、基端側外周面に固定絞り板3を螺合して装着可能な雄ネジ部21を備え、中央部外周面に第1レンズ鏡筒10に螺合して装着可能な雄ネジ部22を備えている。基端側外周部に備えられた雄ネジ部21により固定絞り板3を螺合して装着することにより、固定絞り板3のゆるみを防止できる。また、固定絞り板3を螺合して装着することで、中心軸精度が向上する。
5. Second lens barrel The second lens barrel 20 of the present invention is provided with a male screw portion 21 that can be mounted by screwing the fixed diaphragm plate 3 on the outer peripheral surface on the base end side, and the first lens mirror on the outer peripheral surface of the central portion. A male screw portion 22 that can be screwed into and attached to the cylinder 10 is provided. By loosely fixing the fixed diaphragm plate 3, the fixed diaphragm plate 3 is screwed and mounted by the male screw portion 21 provided on the outer peripheral portion on the base end side. In addition, by mounting the fixed diaphragm plate 3 by screwing, the accuracy of the central axis is improved.

6.固定絞り板
本願発明の固定絞り板3は、絞り開口を有する円板状である。内周面に雌ネジ部23を備え、外周面はローレット加工等により滑り止め処理を施されている。滑り止め処理により、固定絞り板3を第2レンズ鏡筒20にゆるみなく装着できる。
固定絞り板3は、絞り開口が異なる大きさのものを複数備えることが好ましい。撮影条件によって適宜交換できることが好ましいからである。具体的には、撮影場所が屋外等の明るい場所である場合は、絞り開口が小さな固定絞り板3が好ましい。屋内の暗い場所である場合は、絞り開口の大きな固定絞り板3が好ましい。
なお、固定絞り板3の板厚は、0.05〜0.5mmの範囲が好ましい。板厚が0.05mm未満であると遮光性と機械的強度を確保することが難しく、0.5mmを超えると光学的機能が低下するからである。
6. Fixed Aperture Plate The fixed aperture plate 3 of the present invention has a disc shape having an aperture opening. The inner peripheral surface is provided with a female screw portion 23, and the outer peripheral surface is subjected to knurling or the like to prevent slippage. By the anti-slip process, the fixed diaphragm plate 3 can be attached to the second lens barrel 20 without loosening.
The fixed diaphragm plate 3 is preferably provided with a plurality of diaphragm openings having different sizes. This is because it is preferable that they can be appropriately exchanged depending on the shooting conditions. Specifically, when the shooting place is a bright place such as outdoors, the fixed aperture plate 3 having a small aperture opening is preferable. When it is a dark place indoors, the fixed diaphragm plate 3 having a large diaphragm aperture is preferable.
The plate thickness of the fixed diaphragm plate 3 is preferably in the range of 0.05 to 0.5 mm. This is because if the plate thickness is less than 0.05 mm, it is difficult to secure the light shielding property and mechanical strength, and if it exceeds 0.5 mm, the optical function is deteriorated.

7.カメラ本体への装着
レンズ鏡筒1のカメラ本体2への装着は、ナット部材13の基端側外周面に設けられたにカメラ本体2に装着可能な雄ネジ部17を、カメラ本体2の先端内周面に設けられた雌ネジ部(図示せず)に螺合することで行う。その際には、トルクレンチを使って螺合を確実行う必要がある。振動等により緩むおそれがあるからである。
なお、接着剤を使って螺合を行うこともできる。
7. Attachment to Camera Body To attach the lens barrel 1 to the camera body 2, a male screw portion 17 provided on the outer peripheral surface of the nut member 13 on the base end side and attachable to the camera body 2 is attached to the tip of the camera body 2. It is performed by screwing into a female screw portion (not shown) provided on the inner peripheral surface. In that case, it is necessary to securely perform screwing using a torque wrench. This is because there is a risk of loosening due to vibration or the like.
Note that screwing can be performed using an adhesive.

本願発明により、振動防止効果の高い固定絞り板の交換可能なカメラ鏡筒を提供できる。 According to the present invention, it is possible to provide a camera barrel in which the fixed diaphragm plate having a high vibration preventing effect can be exchanged.

1 レンズ鏡筒
2 カメラ本体
3 固定絞り板
10 第1レンズ鏡筒
11 雄ネジ部(第1レンズ鏡筒基端側)
12 雌ネジ部(第1レンズ鏡筒先端側)
13 ナット部材
14 固定リング
15 雌ネジ部(ナット部材内側)
16 雄ネジ部(第1レンズ鏡筒外周)
17 雄ネジ部(ナット部材基端部外周)
20 第1レンズ鏡筒
21 雄ネジ部(第2レンズ鏡筒基端側)
22 雄ネジ部(第2レンズ鏡筒中央)
23 雄ネジ部(固定絞り板内側)
30 トルクレンチ
,A レンズ群
B 光軸
1 Lens Barrel 2 Camera Body 3 Fixed Aperture Plate 10 First Lens Barrel 11 Male Screw Part (First Lens Barrel Base End)
12 Female thread (first lens barrel tip side)
13 nut member 14 fixing ring 15 female screw part (inside of nut member)
16 Male screw part (outer circumference of first lens barrel)
17 Male screw (outer periphery of nut member base)
20 first lens barrel 21 male screw portion (second lens barrel base end side)
22 Male thread (center of second lens barrel)
23 Male thread (inside fixed diaphragm plate)
30 torque wrench A 1 , A 2 lens group B optical axis

Claims (4)

カメラ本体に着脱可能となるように構成されたレンズ鏡筒であって、
前記レンズ鏡筒は、被写体の像を結合させる複数のレンズが光軸を一致させた状態で配置され、螺合して一体となる第1レンズ鏡筒と第2レンズ鏡筒で構成され、
前記第1レンズ鏡筒は、本体部と、本体部の外周に螺合して移動可能な状態で周設されたナット部材及び固定リングで構成され、
前記本体部は、基端側外周面にナット部材及び固定リングを回転移動するため雄ネジ部と、先端側内周面に前記第2レンズ鏡筒を螺合可能な雌ネジ部を備え、
前記ナット部材は、移動して前記カメラ本体と当接することによりカメラ本体と前記第1レンズ鏡筒との相対回転を抑制するように構成され、
前記固定リングは、移動してナット部材と当接することにより、前記ナット部材の回転を抑制するように構成され、
前記第2レンズ鏡筒は、基端側外周面に固定絞り板を螺合可能な雄ネジ部と、中央に前記第1レンズ鏡筒に螺合可能な雄ネジ部を備え、
前記固定絞り板は、前記第2レンズ鏡筒から取り外すことにより交換可能に構成された、
ことを特徴とするレンズ鏡筒。
A lens barrel configured to be detachable from the camera body,
The lens barrel is composed of a first lens barrel and a second lens barrel that are arranged in a state where optical axes of a plurality of lenses that combine images of a subject are aligned with each other and are screwed to be integrated.
The first lens barrel is composed of a main body, a nut member and a fixing ring that are movably mounted around the outer periphery of the main body,
The main body portion includes a male screw portion for rotationally moving the nut member and the fixing ring on the outer peripheral surface on the base end side, and a female screw portion for screwing the second lens barrel on the inner peripheral surface on the tip end side,
The nut member is configured to move and come into contact with the camera body to suppress relative rotation between the camera body and the first lens barrel,
The fixing ring is configured to move and abut the nut member, thereby suppressing rotation of the nut member,
The second lens barrel includes a male screw portion capable of screwing a fixed aperture plate on the outer peripheral surface on the base end side, and a male screw portion capable of screwing the first lens barrel at the center.
The fixed diaphragm plate is configured to be replaceable by removing it from the second lens barrel.
A lens barrel characterized by that.
前記ナット部材は、外周形状がトルクレンチを当接して嵌合可能な六角筒または八角筒であることを特徴とする請求項1に記載したレンズ鏡筒。 The lens barrel according to claim 1, wherein the nut member is a hexagonal cylinder or an octagonal cylinder having an outer peripheral shape that can be fitted by abutting a torque wrench. 前記固定絞り板は、内周面にネジ加工、外周面に滑り防止加工が施されていることを特徴とする請求項1または2のいずれかに記載したレンズ鏡筒。 The lens barrel according to claim 1, wherein the fixed diaphragm plate has an inner peripheral surface screwed and an outer peripheral surface anti-slip. 前記固定絞り板は、絞り開口の異なる複数の取り替え用固定絞り板を備えたことを特徴とする請求項1〜3のいずれかに記載したレンズ鏡筒。 The lens barrel according to claim 1, wherein the fixed diaphragm plate includes a plurality of replacement fixed diaphragm plates having different diaphragm apertures.
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JP2015232687A (en) * 2014-12-04 2015-12-24 興和株式会社 Lens barrel
CN207074291U (en) * 2017-06-28 2018-03-06 瑞声科技(新加坡)有限公司 Barrel and imaging lens
JP2018082397A (en) * 2016-11-18 2018-05-24 アイホン株式会社 Intercom device

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JP2002280535A (en) * 2001-03-16 2002-09-27 Mdi Kk Solid-state imaging device and its manufacturing method
JP2015232687A (en) * 2014-12-04 2015-12-24 興和株式会社 Lens barrel
JP2018082397A (en) * 2016-11-18 2018-05-24 アイホン株式会社 Intercom device
CN207074291U (en) * 2017-06-28 2018-03-06 瑞声科技(新加坡)有限公司 Barrel and imaging lens

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Publication number Priority date Publication date Assignee Title
CN114942557A (en) * 2022-05-13 2022-08-26 湖南长步道光学科技有限公司 Diaphragm adjusting device and lens with same
CN114942557B (en) * 2022-05-13 2024-01-26 湖南长步道光学科技有限公司 Diaphragm adjusting device and lens with same

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