JP2018005135A - Lens barrel and optical instrument - Google Patents

Lens barrel and optical instrument Download PDF

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JP2018005135A
JP2018005135A JP2016135533A JP2016135533A JP2018005135A JP 2018005135 A JP2018005135 A JP 2018005135A JP 2016135533 A JP2016135533 A JP 2016135533A JP 2016135533 A JP2016135533 A JP 2016135533A JP 2018005135 A JP2018005135 A JP 2018005135A
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optical axis
protrusion
fixed cylinder
holding ring
axis direction
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弘一 宿院
Koichi Shukuin
弘一 宿院
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Canon Inc
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Canon Inc
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Abstract

PROBLEM TO BE SOLVED: To provide a lens barrel and optical instrument that excellently maintain an operation feeling of an operation ring without increasing the number of components.SOLUTION: In a lens barrel having an operation ring rotatably held and sandwiched in an optical axis direction by a stationary tube and a holding ring, when the holding ring is assembled into the stationary tube, a part of any one of the holding ring and the stationary tube elastically deforms, and an abutting face of the holding ring is urged in an optical axis direction with respect to an abutting face of the stationary tube. A slide face with an operation ring of the holding ring and a slide face of an operation ring of the stationary tube are configured at a position where deformation of the face due to elastic deformation is small. A wall part of the holding ring and a wall part of the stationary tube in a state where the holding ring is assembled into the stationary tube have a fine gap in the optical axis direction.SELECTED DRAWING: Figure 1

Description

本発明は、レンズ鏡筒および光学機器に関する。   The present invention relates to a lens barrel and an optical apparatus.

従来、カメラに装着される交換レンズにおいてマニュアル操作やズーム操作を行なうためのマニュアル操作環やズーム操作環を２つの固定部材で挟み込み、回転可能に保持する構成が取られている。   2. Description of the Related Art Conventionally, an interchangeable lens mounted on a camera has a configuration in which a manual operation ring and a zoom operation ring for performing manual operation and zoom operation are sandwiched between two fixing members and held rotatably.

特許文献１には、操作環を第一の保持環と第二の保持環で挟んで回転可能に保持する構成において、第一の保持環と第二の保持環をバヨネット結合し、第一の保持環と第二の保持環との間に相対的な回転変位を防止する抜け止め部材を入れる構成のレンズ鏡筒が開示されている。   In Patent Document 1, in a configuration in which the operation ring is rotatably held between the first holding ring and the second holding ring, the first holding ring and the second holding ring are bayonet-coupled, A lens barrel having a structure in which a retaining member for preventing relative rotational displacement is inserted between a retaining ring and a second retaining ring is disclosed.

また従来、図１１に示すレンズ鏡筒のように、第一の保持環と第二の保持環のいずれか一方に光軸に直行する方向に突出した突起部を設け、他方に穴部を設け、突起部を穴部に挿入することで第一の保持環と第二の保持環を互いに固定する構成が知られている。このレンズ鏡筒においては第一の保持環と第二の保持環の光軸方向のガタを防止するため第一の保持環と第二の保持環が光軸方向に互いに引き付け合う構成となっている。   Conventionally, as in the lens barrel shown in FIG. 11, one of the first holding ring and the second holding ring is provided with a protrusion protruding in a direction perpendicular to the optical axis, and the other is provided with a hole. A configuration is known in which a first holding ring and a second holding ring are fixed to each other by inserting a protrusion into a hole. In this lens barrel, the first holding ring and the second holding ring attract each other in the optical axis direction in order to prevent backlash in the optical axis direction of the first holding ring and the second holding ring. Yes.

特開２０１１―２３７５９５号公報JP 2011-237595 A

しかしながら、上述の特許文献１に開示された従来技術では、第一の保持環と第二の保持環との間に相対的な回転変位を防止するための抜け止め部材が必要となり、部品点数が増えコストアップとなってしまう。   However, in the prior art disclosed in Patent Document 1 described above, a retaining member for preventing relative rotational displacement is required between the first retaining ring and the second retaining ring, and the number of parts is reduced. Increased costs.

また、図１１に示すレンズ鏡筒では第一の保持環と第二の保持環が光軸方向に互いに引き付け合う構成となっているため第一の保持環、第二の保持環それぞれの操作環との摺動面が変形しやすくなっている。摺動面が変形し、摺動面の平面度が低下すると操作環の操作感に影響してしまう。   Further, in the lens barrel shown in FIG. 11, since the first holding ring and the second holding ring are configured to attract each other in the optical axis direction, the operation rings of the first holding ring and the second holding ring, respectively. The sliding surface is easily deformed. When the sliding surface is deformed and the flatness of the sliding surface is lowered, the operational feeling of the operation ring is affected.

そこで、本発明は、部品点数を増やすことなく操作環の操作感を良好に保ったレンズ鏡筒および光学機器を提供することを目的とする。   SUMMARY OF THE INVENTION An object of the present invention is to provide a lens barrel and an optical apparatus that maintain a good feeling of operation of an operation ring without increasing the number of parts.

上記の目的を達成するために、本発明に係るレンズ鏡筒は、
固定筒と保持環により光軸方向に挟み込まれて回転可能に保持された操作環を有するレンズ鏡筒において、前記保持環は前記固定筒と光軸方向で当接される第一の当接面と、前記操作環と当接して摺動する第一の摺動面と、光軸と直行し前記保持環が前記固定筒に組み込まれる方向と反対側に平面部を有する第一の壁部と、を有し、前記固定筒は前記保持環と光軸方向で当接される第二の当接面と、前記操作環と当接して摺動する第二の摺動面と、光軸と直行し前記保持環が前記固定筒に組み込まれる方向と同じ側に平面部を有する第二の壁部と、を有し、前記保持環が前記固定筒に組み込まれると前記保持環と前記固定筒のうちいずれか一方の一部が弾性変形して第一の当接面が前記第二の当接面に対して光軸方向に付勢され、第一の摺動面と第二の摺動面は前記弾性変形による面の変形が小さい位置に構成され、前記保持環が前記固定筒に組み込まれた状態で第一の壁部と第二の壁部は光軸方向に微小な隙間を有することを特徴とする。 In order to achieve the above object, a lens barrel according to the present invention includes:
In the lens barrel having an operation ring that is sandwiched in the optical axis direction by a fixed cylinder and a holding ring and is rotatably held, the holding ring is in contact with the fixed cylinder in the optical axis direction. A first sliding surface that slides in contact with the operation ring, and a first wall portion that is perpendicular to the optical axis and has a flat portion on a side opposite to the direction in which the holding ring is incorporated in the fixed cylinder, The fixed cylinder is in contact with the holding ring in the optical axis direction, a second sliding surface that is in contact with and slides on the operating ring, and an optical axis. A second wall portion having a plane portion on the same side as the direction in which the holding ring is incorporated into the fixed cylinder, and when the holding ring is incorporated into the fixed cylinder, the holding ring and the fixed cylinder The first contact surface is urged in the optical axis direction with respect to the second contact surface, and a part of either one of them is elastically deformed. And the second sliding surface is configured at a position where deformation of the surface due to the elastic deformation is small, and the first wall portion and the second wall portion are in the optical axis direction in a state where the holding ring is incorporated in the fixed cylinder. It is characterized by having a minute gap.

本発明によれば、部品点数を増やすことなく操作環の操作感を良好に保ったレンズ鏡筒および光学機器を提供することができる。   According to the present invention, it is possible to provide a lens barrel and an optical apparatus that maintain a good feeling of operation of the operation ring without increasing the number of parts.

本実施形態のレンズ鏡筒の部分断面図である。It is a fragmentary sectional view of the lens barrel of this embodiment. 実施例１の固定筒とフォーカス操作環と保持環の分解斜視図である。FIG. 3 is an exploded perspective view of a fixed cylinder, a focus operation ring, and a holding ring according to the first embodiment. 実施例１の固定筒とフォーカス操作環と保持環の部分断面図である。3 is a partial cross-sectional view of a fixed cylinder, a focus operation ring, and a holding ring according to Embodiment 1. FIG. 実施例１の保持環の部分斜視図である。3 is a partial perspective view of a retaining ring according to Embodiment 1. FIG. 実施例１の固定筒の部分斜視図である。3 is a partial perspective view of a fixed cylinder of Example 1. FIG. 実施例２の固定筒とフォーカス操作環と保持環の部分断面図である。FIG. 6 is a partial cross-sectional view of a fixed cylinder, a focus operation ring, and a holding ring of Example 2. 実施例３の固定筒とフォーカス操作環と保持環の分解斜視図である。FIG. 10 is an exploded perspective view of a fixed cylinder, a focus operation ring, and a holding ring of Example 3. 実施例３の物体側から見た正面図である。FIG. 10 is a front view of the third embodiment viewed from the object side. 実施例３の固定筒とフォーカス操作環と保持環の部分断面図である。FIG. 6 is a partial cross-sectional view of a fixed cylinder, a focus operation ring, and a holding ring of Example 3. 実施例３の固定筒とフォーカス操作環と保持環の部分断面図である。FIG. 6 is a partial cross-sectional view of a fixed cylinder, a focus operation ring, and a holding ring of Example 3. 従来例のレンズ鏡筒の部分断面図である。It is a fragmentary sectional view of the lens barrel of a prior art example.

以下に、本発明の好ましい実施の形態を、添付の図面に基づいて詳細に説明する。図１は本実施形態に係る一眼レフカメラ用のレンズ鏡筒（交換レンズ）１００の部分断面図である
［実施例１］
以下、図１を参照して本発明の第1の実施例について説明する。 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a partial cross-sectional view of a lens barrel (interchangeable lens) 100 for a single-lens reflex camera according to the present embodiment.
A first embodiment of the present invention will be described below with reference to FIG.

レンズ鏡筒１００は、破線で示すカメラ本体２００に装着可能であり、被写体の光学像を形成する撮影光学系を収納する。レンズ鏡筒１００はカメラ本体２００に装着されてカメラシステム（光学機器）を構成する。図１の左側が被写体（物体）側であり、右側が像側であり、一点鎖線は撮影光学系の光軸である。図１はレンズ交換型の撮像装置（光学機器）を示しているが、本発明はレンズ鏡筒がカメラ本体に一体に設けられた光学機器にも適用可能である。   The lens barrel 100 can be attached to the camera body 200 indicated by a broken line, and houses a photographing optical system that forms an optical image of a subject. The lens barrel 100 is attached to the camera body 200 to constitute a camera system (optical device). The left side of FIG. 1 is the subject (object) side, the right side is the image side, and the alternate long and short dash line is the optical axis of the imaging optical system. FIG. 1 shows an interchangeable lens type imaging apparatus (optical apparatus), but the present invention can also be applied to an optical apparatus in which a lens barrel is provided integrally with a camera body.

図１において、１〜６は撮影光学系を構成するレンズを保持するレンズ群ユニットを示している。   In FIG. 1, reference numerals 1 to 6 denote lens group units that hold lenses constituting the photographing optical system.

１は１群ユニットであり、ガラスを保持する１群鏡筒と、１群鏡筒がビス止めされたフィルター枠８で構成される。フィルター枠８の先端外周にはバヨネット部が、内周には不図示のネジ部が設けられ、それぞれフード、フィルター等のアクセサリーが装着可能となっている。１群ユニット１には前面にレンズ名称等の表示が印刷されたネームプレート９が接着固定されている。   Reference numeral 1 denotes a first group unit, which includes a first group barrel holding glass and a filter frame 8 to which the first group barrel is screwed. A bayonet portion is provided on the outer periphery of the tip end of the filter frame 8 and a screw portion (not shown) is provided on the inner periphery, and accessories such as a hood and a filter can be attached thereto. A name plate 9 having a lens name or the like printed on the front is bonded and fixed to the first group unit 1.

２は２群ユニットであり、２群ユニット２はレンズを保持する２群鏡筒１７を光軸に垂直な平面内で駆動させることで防振効果を出す防振ユニットであり、レンズを保持する保持部材として機能する。２群鏡筒１７は不図示のボールを挟んで地板１８側に不図示のバネにより付勢されている。２群鏡筒１７には不図示のコイルが２つ固定されており、地板１８にはコイルに対向する位置に不図示のマグネット２つが固定されている。コイルに適宜通電することでコイルに流れる電流と、磁石の磁場により推力が働き２群鏡筒１７を光軸に垂直な平面内で駆動させることができる。   Reference numeral 2 denotes a second group unit, and the second group unit 2 is a vibration isolation unit that provides a vibration isolation effect by driving a second group barrel 17 holding a lens in a plane perpendicular to the optical axis, and holds the lens. It functions as a holding member. The second group lens barrel 17 is biased by a spring (not shown) toward the base plate 18 with a ball (not shown) interposed therebetween. Two coils (not shown) are fixed to the second group barrel 17, and two magnets (not shown) are fixed to the base plate 18 at positions facing the coils. By appropriately energizing the coil, a thrust is generated by the current flowing through the coil and the magnetic field of the magnet, and the second group lens barrel 17 can be driven in a plane perpendicular to the optical axis.

３はレンズを保持する３群鏡筒ユニット３ａと光量調節部材３ｂとが一体的に結合された３群ユニットである。   Reference numeral 3 denotes a third group unit in which a third group barrel unit 3a for holding a lens and a light amount adjusting member 3b are integrally coupled.

４、５、６はそれぞれレンズを保持する４群ユニット、５群ユニット、６群ユニットであり、４群ユニット４と６群ユニット６は不図示のビスで固定され一体的に結合されて４−６群ユニット７として一体的に動く。また５群ユニット５は、４群ユニットと６群ユニットの間に位置し、ピント調整時に光軸方向に進退するフォーカスユニットである。   Reference numerals 4, 5, and 6 respectively denote a fourth group unit, a fifth group unit, and a sixth group unit that hold the lens. The fourth group unit 4 and the sixth group unit 6 are fixed with a screw (not shown) and integrally coupled. It moves integrally as a 6-group unit 7. The fifth group unit 5 is a focus unit that is positioned between the fourth group unit and the sixth group unit and moves forward and backward in the optical axis direction during focus adjustment.

フォーカスユニットを駆動するフォーカスアクチュエータ２０は６群ユニット６にビス止めさている。フォーカスアクチュエータはステッピングモータとステッピングモータから撮像面方向に伸びるリードスクリューで構成される。５群ユニット５にはリードスクリューに螺合するラック２１が取り付けられており、ステッピングモータに通電してリードスクリューを回転させると、リードスクリューに螺合したラックを介して５群ユニット５が光軸方向に進退し、ピント調整が可能となる。   A focus actuator 20 for driving the focus unit is screwed to the sixth group unit 6. The focus actuator includes a stepping motor and a lead screw extending from the stepping motor in the direction of the imaging surface. A rack 21 that is screwed to the lead screw is attached to the fifth group unit 5, and when the stepping motor is energized to rotate the lead screw, the fifth group unit 5 is connected to the optical axis via the rack screwed to the lead screw. You can move forward and backward in the direction to adjust the focus.

１９は光軸回りの回転が可能なフォーカス操作環であり、固定筒１１の外周に回転可能に嵌合している。フォーカス操作環１９の内周には櫛歯形状１９ａが形成されている。２０は保持環であり、保持環２０に設けられた光軸から直行する方向に突出した突起を固定筒１１の穴部に挿入することで固定筒１１に固定される。フォーカス操作環１９は固定筒１１と保持環２０により光軸方向にガタを持った状態で挟まれることで光軸方向の動きが規制され回転操作のみ可能となっている。   Reference numeral 19 denotes a focus operation ring that can rotate around the optical axis, and is rotatably fitted to the outer periphery of the fixed cylinder 11. A comb tooth shape 19 a is formed on the inner periphery of the focus operation ring 19. Reference numeral 20 denotes a holding ring, which is fixed to the fixed cylinder 11 by inserting a protrusion protruding in a direction perpendicular to the optical axis provided in the holding ring 20 into the hole of the fixed cylinder 11. The focus operation ring 19 is sandwiched between the fixed cylinder 11 and the holding ring 20 with a backlash in the optical axis direction, so that the movement in the optical axis direction is restricted and only a rotation operation is possible.

固定筒１１には不図示のフォトインタラプタ２つが実装されたフレキシブル基板が固定されている。２つのフォトインタラプタは光軸に直行する方向で外側に向いて固定されており、フォトインタラプタの受光部と発光部の間にフォーカス操作環１９の内周に形成された櫛歯形状１９ａが入り込む。また２つのフォトインタラプタは固定筒１１の周方向に並んで固定されている。   A flexible substrate on which two photo interrupters (not shown) are mounted is fixed to the fixed cylinder 11. The two photo interrupters are fixed outward in a direction perpendicular to the optical axis, and a comb tooth shape 19a formed on the inner periphery of the focus operation ring 19 enters between the light receiving portion and the light emitting portion of the photo interrupter. The two photo interrupters are fixed side by side in the circumferential direction of the fixed cylinder 11.

１５は固定筒５に固定されている基板ユニットで、フォーカスユニット、光量調節部材３ｂ、防振ユニットである２群ユニット２と電気的に接続されて各種制御を行うとともに、不図示の通信接点を介してカメラ本体２００との通信および電源供給を行う。   A substrate unit 15 is fixed to the fixed cylinder 5 and is electrically connected to the focus unit, the light amount adjusting member 3b, and the second group unit 2 which is an anti-vibration unit to perform various controls, and a communication contact (not shown) is provided. And communication with the camera body 200 and power supply.

次にマニュアルフォーカス時の操作とレンズ鏡筒内の制御および動作について説明する。   Next, operations during manual focus and control and operation in the lens barrel will be described.

フォーカス操作環１９を回すと２つのフォトインタラプタがフォーカス操作環１９の回転方向と回転量を検出する。検出されたフォーカス操作環１９の回転方向と回転量の信号は基板ユニット１５のレンズ制御回路に送られる。レンズ制御回路はレンズ制御回路内に記録されたフォーカスユニット５の位置情報とフォーカス操作環１９の回転方向と回転量とに基づいてフォーカスアクチュエータ２０を駆動し、フォーカスユニット５を光軸方向に駆動する。   When the focus operation ring 19 is turned, the two photo interrupters detect the rotation direction and the rotation amount of the focus operation ring 19. The detected rotation direction and rotation amount signals of the focus operation ring 19 are sent to the lens control circuit of the substrate unit 15. The lens control circuit drives the focus actuator 20 based on the position information of the focus unit 5 recorded in the lens control circuit, the rotation direction and the rotation amount of the focus operation ring 19, and drives the focus unit 5 in the optical axis direction. .

１０はマウントで、カメラ本体２００に取り付けるためのバヨネット部を有しており、固定筒１１にビス止め（不図示）されている。また、マウント１０の内径にせり出したフランジ部は有害光をカットする役割を持つ。   Reference numeral 10 denotes a mount, which has a bayonet portion to be attached to the camera body 200 and is screwed to the fixed cylinder 11 (not shown). Further, the flange portion protruding to the inner diameter of the mount 10 has a role of cutting harmful light.

１２は後述のズームキー（不図示）と一体的に光軸回りの回転が可能なズーム操作環であり、固定筒１１の外周に回転可能に嵌合し、ズームキーを介してカム筒１３を回転させることができる。   Reference numeral 12 denotes a zoom operation ring that can rotate around an optical axis integrally with a zoom key (not shown), which will be described later. The zoom operation ring 12 is rotatably fitted to the outer periphery of the fixed cylinder 11 and rotates the cam cylinder 13 via the zoom key. be able to.

１４は案内筒で、固定筒１１にビス止めされることでカメラ本体２００に対して固定部を構成している。案内筒１４の外周には、案内筒１４に設けられた周上の突起部にバヨネット結合する周溝部を有するカム筒１３が径嵌合し、カム筒１３は光軸回りの回転のみ可能となっている。カム筒１３にはズームキーが一体的に固定されている。カム筒１３を回転させると、案内筒１４に設けられた光軸方向に形成された案内溝とカム筒１３に設けられたカム溝に挿入されたカムフォロワー（不図示）が光軸方向に移動する。これにより、カムフォロワーがビス止めされて一体となった１群ユニット１、３群ユニット３および４−６群ユニット７をそれぞれ光軸方向に移動する。   Reference numeral 14 denotes a guide cylinder, which is fixed to the fixed cylinder 11 with a screw to constitute a fixed portion with respect to the camera body 200. On the outer periphery of the guide cylinder 14, a cam cylinder 13 having a circumferential groove portion that is bayonet-coupled to a protrusion on the circumference provided on the guide cylinder 14 is fitted in diameter, and the cam cylinder 13 can only rotate around the optical axis. ing. A zoom key is integrally fixed to the cam cylinder 13. When the cam cylinder 13 is rotated, the guide groove formed in the optical axis direction provided in the guide cylinder 14 and the cam follower (not shown) inserted in the cam groove provided in the cam cylinder 13 move in the optical axis direction. To do. As a result, the first group unit 1, the third group unit 3, and the 4-6 group unit 7 in which the cam followers are screwed together are moved in the optical axis direction.

以上の構成によりズーム操作環１４を回転させると、ズームキーを介してカム筒１３が回転し、２群ユニット２以外の全てのレンズ群ユニットが光軸方向に進退してズーミングが行われる。   When the zoom operation ring 14 is rotated with the above configuration, the cam cylinder 13 is rotated via the zoom key, and all the lens group units other than the second group unit 2 are advanced and retracted in the optical axis direction for zooming.

光量調整は、光量調節部材３ｂを駆動させることで行う。光量調節部材３ｂは、複数の絞り羽根を有する絞りユニットである。不図示の絞りアクチュエータを作動させ、絞り羽根を駆動する。これにより、光通過口となる開口面積（絞り口径）を変化させ光量を調整する。   The light amount adjustment is performed by driving the light amount adjustment member 3b. The light quantity adjusting member 3b is an aperture unit having a plurality of aperture blades. A diaphragm actuator (not shown) is operated to drive the diaphragm blades. As a result, the amount of light is adjusted by changing the aperture area (diaphragm aperture) serving as the light passage aperture.

次に固定筒１１と保持環２０の固定方法について詳細に説明する。   Next, a method for fixing the fixed cylinder 11 and the holding ring 20 will be described in detail.

図２は固定筒１１とフォーカス操作環１９と保持環２０の分解斜視図であり、固定筒１１にフォーカス操作環１９、保持環２０を光軸方向物体側から組み込む前の状態である。図３は固定筒１１にフォーカス操作環１９、保持環２０を組み込んだ後の部分断面図である。図４は保持環２０の部分斜視図である。図５は固定筒１１の部分斜視図である。   FIG. 2 is an exploded perspective view of the fixed cylinder 11, the focus operation ring 19, and the holding ring 20, and shows a state before the focus operation ring 19 and the holding ring 20 are assembled into the fixed cylinder 11 from the object side in the optical axis direction. FIG. 3 is a partial cross-sectional view after the focus operation ring 19 and the holding ring 20 are assembled in the fixed cylinder 11. FIG. 4 is a partial perspective view of the holding ring 20. FIG. 5 is a partial perspective view of the fixed cylinder 11.

図３、図４、図５を参照して固定筒１１と保持環２０の固定方法について説明する。   A method of fixing the fixed cylinder 11 and the holding ring 20 will be described with reference to FIGS. 3, 4, and 5.

保持環２０の端面２０ｆと固定筒１１の端面１１ｆは当接し、固定筒１１と保持環２０の光軸方向の相対的な位置が決まっている。   The end face 20f of the holding ring 20 and the end face 11f of the fixed cylinder 11 are in contact with each other, and the relative positions of the fixed cylinder 11 and the holding ring 20 in the optical axis direction are determined.

固定筒１１の外径部１１ｈは操作環１９の内径部１９ｄと径嵌合し、保持環２０の壁面２０ｇは操作環１９の物体側端面１９ｃと当接し、固定筒１１の物体側端面１１ｇは操作環１９の被写体側端面１９ｂと当接している。２０ｇと１１ｇの間の寸法は１９ｃと１９ｂの間の寸法より大きいため、フォーカス操作環１９は固定筒１１と保持環２０により光軸方向にガタをもった状態で挟まれ光軸方向の動きが規制されて回転操作のみ可能となっている。操作環１９が回転操作されると保持環２０の壁面２０ｇと操作環１９の物体側端面１９ｃの間、固定筒１１の物体側端面１１ｇと操作環２０の被写体側端面１９ｂの間、固定筒１１の外径部１１ｈと操作環１９の内径部１９ｄの間で摺動する。   The outer diameter portion 11h of the fixed cylinder 11 is fitted to the inner diameter portion 19d of the operation ring 19, the wall surface 20g of the holding ring 20 is in contact with the object side end face 19c of the operation ring 19, and the object side end face 11g of the fixed cylinder 11 is The operation ring 19 is in contact with the subject side end surface 19b. Since the dimension between 20g and 11g is larger than the dimension between 19c and 19b, the focus operation ring 19 is sandwiched between the fixed cylinder 11 and the holding ring 20 in the optical axis direction and the movement in the optical axis direction is made. It is restricted and can only rotate. When the operation ring 19 is rotated, between the wall surface 20 g of the holding ring 20 and the object side end surface 19 c of the operation ring 19, between the object side end surface 11 g of the fixed tube 11 and the subject side end surface 19 b of the operation ring 20, the fixed tube 11. Slides between the outer diameter portion 11h of the inner ring and the inner diameter portion 19d of the operation ring 19.

保持環２０の第一の鍔部２０ｈは固定筒１１の内径側に配置される。第一の鍔部２０ｈから光軸直行方向で外径側に突出した第一の突起部２０ａと第二の突起部２０ｂが形成される。固定筒１１には第一の突起部２０ａと第二の突起部２０ｂがそれぞれ挿入される第一の穴部１１ａと第二の穴部１１ｂが形成される。   The first flange portion 20 h of the holding ring 20 is disposed on the inner diameter side of the fixed cylinder 11. A first projecting portion 20a and a second projecting portion 20b projecting from the first flange portion 20h to the outer diameter side in the direction orthogonal to the optical axis are formed. The fixed cylinder 11 is formed with a first hole portion 11a and a second hole portion 11b into which the first protrusion portion 20a and the second protrusion portion 20b are respectively inserted.

保持環２０の第一の突起部２０ａの物体側の壁面２０ｃと、固定筒１１の第一の穴部１１ａの物体側の壁面１１ｃは光軸方向に微小な隙間を有している。保持環２０の第二の突起部２０ｂの物体側の壁面２０ｄと固定筒１１の第二の穴部１１ｂの物体側の壁面１１ｄは光軸方向に微小な隙間を有している。   The object-side wall surface 20c of the first protrusion 20a of the holding ring 20 and the object-side wall surface 11c of the first hole 11a of the fixed cylinder 11 have a small gap in the optical axis direction. The object-side wall surface 20d of the second protrusion 20b of the retaining ring 20 and the object-side wall surface 11d of the second hole 11b of the fixed cylinder 11 have a small gap in the optical axis direction.

第二の突起部２０ｂの物体側壁面２０ｄの内径側の根元には斜面２０ｅが形成されており、固定筒１１の第二の穴部１１ｂの物体側の壁面１１ｄの内径側には斜面２０ｅに対応するように斜面１１ｅが形成されている。   A slope 20e is formed at the base on the inner diameter side of the object side wall surface 20d of the second protrusion 20b, and the slope 20e is formed on the inner diameter side of the wall 11d on the object side of the second hole 11b of the fixed cylinder 11. A slope 11e is formed so as to correspond.

保持環２０の端面２０ｆと斜面２０ｅの間の光軸方向寸法は固定筒１１の端面１１ｆと斜面１１ｅの間の光軸方向寸法より若干小さくなるように設定されている。これにより保持環２０の第二の突起部２０ｂが固定筒１１の第二の穴部１１ｂに挿入されると保持環２０は光軸方向撮像面側に付勢される。このとき固定筒１１の第一の穴部１１ａと第二の穴部１１ｂで挟まれた橋部１１ｉは、保持環２０の斜面２０ｅが固定筒１１の斜面１１ｅを付勢することにより光軸方向物体側に変形するように形成されている。   The dimension in the optical axis direction between the end surface 20f of the holding ring 20 and the inclined surface 20e is set to be slightly smaller than the dimension in the optical axis direction between the end surface 11f of the fixed cylinder 11 and the inclined surface 11e. As a result, when the second protrusion 20b of the holding ring 20 is inserted into the second hole 11b of the fixed cylinder 11, the holding ring 20 is urged toward the imaging surface side in the optical axis direction. At this time, the bridge portion 11i sandwiched between the first hole portion 11a and the second hole portion 11b of the fixed cylinder 11 is formed in the optical axis direction by the inclined surface 20e of the retaining ring 20 urging the inclined surface 11e of the fixed cylinder 11. It is formed so as to be deformed toward the object side.

次に本実施例の構成による効果について説明する。   Next, the effect of the configuration of this embodiment will be described.

保持環２０が固定筒１１に組み込まれると斜面２０ｅが斜面１１ｅを付勢するため橋部１１ｉが光軸方向物体側に変形する。このため保持環２０と固定筒１１は光軸方向にガタがない状態で固定される。さらに橋部１１ｉの幅を狭くし、変形しやすくすることで橋部１１ｉ以外の部分の変形を抑えられる。つまり変形しやすい橋部１１ｉから離した位置に固定筒１１の端面１１ｇ、外径部１１ｈおよび保持環２０の端面２０ｇを構成することで固定筒１１の端面１１ｇ、外径部１１ｈおよび保持環２０の端面２０ｇの変形を小さくでき、固定筒１１の端面１１ｇおよび保持環２０の端面２０ｇの平面度と固定筒１１の外径部１１ｈの真円度の低下が抑えられる。   When the holding ring 20 is incorporated in the fixed cylinder 11, the inclined surface 20e biases the inclined surface 11e, so that the bridge portion 11i is deformed to the object side in the optical axis direction. For this reason, the holding ring 20 and the fixed cylinder 11 are fixed without any play in the optical axis direction. Further, by narrowing the width of the bridge portion 11i and facilitating deformation, deformation of portions other than the bridge portion 11i can be suppressed. That is, the end face 11g, the outer diameter part 11h, and the holding ring 20 of the fixed cylinder 11 are formed by forming the end face 11g, the outer diameter part 11h, and the end face 20g of the holding ring 20 at positions away from the easily deformable bridge part 11i. The deformation of the end face 20g can be reduced, and the flatness of the end face 11g of the fixed cylinder 11 and the end face 20g of the holding ring 20 and the roundness of the outer diameter part 11h of the fixed cylinder 11 can be suppressed.

これによりフォーカス操作環１９の操作感は良好となる。さらに操作環２０の第一の突起部２０ａの物体側の壁面２０ｃと、固定筒１１の第一の穴部１１ａの物体側の壁面１１ｃは光軸方向に微小な隙間を有して対向しているため、仮にフォーカス操作環１９をユーザーが無理に光軸方向物体側に引っ張った場合でも壁面２０ｃが壁面１１ｃと当接する。これにより保持環２０の突起部２０ａおよび２０ｂが固定筒１１の穴部１１ａ、１１ｂから抜けて保持環２０が固定筒１１から外れることを防止できる。   Thereby, the feeling of operation of the focus operation ring 19 is improved. Further, the object-side wall surface 20c of the first protrusion 20a of the operation ring 20 and the object-side wall surface 11c of the first hole 11a of the fixed cylinder 11 are opposed to each other with a minute gap in the optical axis direction. Therefore, even if the user forcibly pulls the focus operation ring 19 toward the object side in the optical axis direction, the wall surface 20c contacts the wall surface 11c. As a result, the protrusions 20 a and 20 b of the holding ring 20 can be prevented from coming off from the holes 11 a and 11 b of the fixed cylinder 11 and the holding ring 20 being detached from the fixed cylinder 11.

また、本実施例では部品点数を増やすことなくフォーカス操作環１９、固定筒１１、保持環２０の３部品のみの構成によりフォーカス操作環の良好な操作感と、保持環２０の固定筒１１からの外れ防止が可能となる。   In this embodiment, the focus operation ring 19 has a good feeling of operation, and the holding ring 20 is fixed from the fixed cylinder 11 by the configuration of only the three parts of the focus operation ring 19, the fixed cylinder 11 and the holding ring 20 without increasing the number of parts. Detachment can be prevented.

［実施例２］
図６は固定筒２１１にフォーカス操作環１９、保持環２２０を組み込んだ後の部分断面図である。 [Example 2]
FIG. 6 is a partial cross-sectional view after the focus operation ring 19 and the holding ring 220 are assembled in the fixed cylinder 211.

以下、本件実施例１のレンズ鏡筒と異なる構成である固定筒２１１と保持環２２０の固定方法について図６を参照して本発明の第２の実施例について説明する。固定筒２１１の内径部から光軸直行方向で内径側に突出した第三の突起部２１１ａと第四の突起部２１１ｂが形成される。   Hereinafter, a second embodiment of the present invention will be described with reference to FIG. 6 with respect to a fixing method of the fixed barrel 211 and the holding ring 220 which are different from the lens barrel of the first embodiment. A third protruding portion 211a and a fourth protruding portion 211b are formed that protrude from the inner diameter portion of the fixed cylinder 211 toward the inner diameter side in the direction orthogonal to the optical axis.

保持環２２０の第二の鍔部２２０ｈは固定筒２１１の内径側に配置される。第二の鍔部２２０ｈには第三の突起部２１１ａと第四の突起部２１１ｂがそれぞれ挿入される第三の穴部２２０ａと第四の穴部２２０ｂが形成される。   The second flange 220 h of the holding ring 220 is disposed on the inner diameter side of the fixed cylinder 211. The second flange 220h is formed with a third hole 220a and a fourth hole 220b into which the third protrusion 211a and the fourth protrusion 211b are inserted, respectively.

固定筒２１１の第三の突起部２１１ａの撮像面側の壁面２１１ｃと、保持環２２０の第三の穴部２２０ａの撮像面側の壁面２２０ｃは光軸方向に微小な隙間を有している。固定筒２１１の第四の突起部２１１ｂの撮像面側の壁面２１１ｄと保持環２２０の第四の穴部２２０ｂの撮像面側の壁面２２０ｄは光軸方向に微小な隙間を有している。   The wall surface 211c on the imaging surface side of the third protrusion 211a of the fixed cylinder 211 and the wall surface 220c on the imaging surface side of the third hole 220a of the holding ring 220 have a small gap in the optical axis direction. The wall surface 211d on the imaging surface side of the fourth protrusion 211b of the fixed cylinder 211 and the wall surface 220d on the imaging surface side of the fourth hole 220b of the holding ring 220 have a small gap in the optical axis direction.

固定筒２１１の第四の突起部２１１ｂの撮像面側壁面２１１ｄの外径側の根元には斜面２１１ｅが形成されており、保持環２２０の第四の穴部２２０ｂの撮像面側の壁面２２０ｄの外径側には斜面２１１ｅに対応するように斜面２２０ｅが形成されている。   A slope 211e is formed at the outer diameter side base of the imaging surface side wall surface 211d of the fourth protrusion 211b of the fixed cylinder 211, and the imaging surface side wall surface 220d of the fourth hole 220b of the holding ring 220 is formed. A slope 220e is formed on the outer diameter side so as to correspond to the slope 211e.

保持環２２０の端面２２０ｆと斜面２２０ｅの間の光軸方向寸法は固定筒２１１の端面２１１ｆと斜面２１１ｅの間の光軸方向寸法より若干小さくなるように設定されている。これにより固定筒２１１の第四の突起部２１１ｂが保持環２２０の第四の穴部２２０ｂに挿入されると保持環２２０は光軸方向撮像面側に付勢される。このとき保持環２２０の第三の穴部２２０ａと第四の穴部２２０ｂで挟まれた橋部２２０ｉは、固定筒２１１の斜面２１１ｅが保持環２２０の斜面２２０ｅを付勢することにより光軸方向物体側に変形するように形成されている。   The dimension in the optical axis direction between the end surface 220f of the holding ring 220 and the inclined surface 220e is set to be slightly smaller than the dimension in the optical axis direction between the end surface 211f of the fixed cylinder 211 and the inclined surface 211e. Accordingly, when the fourth protrusion 211b of the fixed cylinder 211 is inserted into the fourth hole 220b of the holding ring 220, the holding ring 220 is urged toward the optical axis direction imaging surface side. At this time, the bridge portion 220i sandwiched between the third hole portion 220a and the fourth hole portion 220b of the holding ring 220 is formed in the direction of the optical axis by the inclined surface 211e of the fixed cylinder 211 urging the inclined surface 220e of the holding ring 220. It is formed so as to be deformed toward the object side.

次に本実施例の構成による効果について説明する。   Next, the effect of the configuration of this embodiment will be described.

保持環２２０が固定筒２１１に組み込まれると斜面２１１ｅが斜面２２０ｅを付勢するため橋部２２０ｉが光軸方向撮像面側に変形する。このため保持環２０と固定筒１１は光軸方向にガタがない状態で固定されるとともに斜面２１１ｅが斜面２２０ｅを付勢することによる摺動面である固定筒２１１の端面２１１ｇおよび保持環２０の端面２２０ｇの平面度と固定筒２１１の外径部２１１ｈの真円度の低下が抑えられる。これによりフォーカス操作環１９の操作感は良好となる。   When the holding ring 220 is incorporated into the fixed cylinder 211, the inclined surface 211e biases the inclined surface 220e, so that the bridge portion 220i is deformed to the optical axis direction imaging surface side. For this reason, the holding ring 20 and the fixed cylinder 11 are fixed without any play in the optical axis direction, and the end surface 211g of the fixed cylinder 211 and the holding ring 20 are sliding surfaces by the inclined surface 211e urging the inclined surface 220e. A decrease in flatness of the end face 220g and roundness of the outer diameter portion 211h of the fixed cylinder 211 can be suppressed. Thereby, the feeling of operation of the focus operation ring 19 is improved.

さらに固定筒２１１の第三の突起部２１１ａの撮像面側の壁面２１１ｃと、保持環２２０の第三の穴部２２０ａの撮像面側の壁面２２０ｃは光軸方向に微小な隙間を有して対向しているため、仮にフォーカス操作環１９をユーザーが無理に光軸方向物体側に引っ張った場合でも壁面２１１ｃが壁面２２０ｃと当接する。これにより固定筒２１１の突起部２１１ａおよび２１１ｂが保持環２２０の穴部２２０ａ、２２０ｂから抜けて保持環２２０が固定筒２１１から外れることを防止できる。   Further, the imaging surface side wall surface 211c of the third protrusion 211a of the fixed cylinder 211 and the imaging surface side wall surface 220c of the third hole 220a of the holding ring 220 are opposed to each other with a small gap in the optical axis direction. Therefore, even if the user forcibly pulls the focus operation ring 19 toward the object side in the optical axis direction, the wall surface 211c contacts the wall surface 220c. As a result, the protrusions 211 a and 211 b of the fixed cylinder 211 can be prevented from coming off from the holes 220 a and 220 b of the holding ring 220 and the holding ring 220 being detached from the fixed cylinder 211.

［実施例３］
図７は固定筒３１１とフォーカス操作環１９と保持環３２０の分解斜視図であり、固定筒３１１にフォーカス操作環１９、保持環３２０を光軸方向物体側から組み込む前の状態である。図８は固定筒３１１にフォーカス操作環１９、保持環３２０を組み込んだ後ものを物体側から見た正面図である。図９は図８の固定筒３１１、フォーカス操作環１９、保持環３２０をＡ−Ａ断面で見た部分断面図である。 図１０は図８の固定筒３１１、フォーカス操作環１９、保持環３２０をＢ−Ｂ断面で見た部分断面図である。 [Example 3]
FIG. 7 is an exploded perspective view of the fixed cylinder 311, the focus operation ring 19, and the holding ring 320, and shows a state before the focus operation ring 19 and the holding ring 320 are assembled into the fixed cylinder 311 from the object side in the optical axis direction. FIG. 8 is a front view of the fixed cylinder 311 after the focus operation ring 19 and the holding ring 320 are assembled, as viewed from the object side. FIG. 9 is a partial cross-sectional view of the fixed cylinder 311, the focus operation ring 19, and the holding ring 320 shown in FIG. FIG. 10 is a partial cross-sectional view of the fixed cylinder 311, the focus operation ring 19, and the holding ring 320 of FIG.

以下、本件実施例１のレンズ鏡筒と異なる構成である固定筒３１１と保持環３２０の固定方法について図７、図８、図９を参照して本発明の第３の実施例について説明する。   Hereinafter, a third embodiment of the present invention will be described with reference to FIGS. 7, 8, and 9 regarding a fixing method of the fixed barrel 311 and the holding ring 320, which is different from the lens barrel of the first embodiment.

保持環３２０の第三の鍔部３２０ｈは固定筒３１１の内径側に配置される。第三の鍔部３２０ｈから光軸直行方向で外径側に突出した第五の突起部３２０ａが形成される。固定筒３１１には第五の突起部３２０ａが挿入される第五の穴部３１１ａが形成される。   The third collar portion 320 h of the holding ring 320 is disposed on the inner diameter side of the fixed cylinder 311. A fifth protrusion 320a is formed which protrudes from the third flange 320h to the outer diameter side in the direction orthogonal to the optical axis. The fixed cylinder 311 is formed with a fifth hole 311a into which the fifth protrusion 320a is inserted.

また前記第三の鍔部３２０ｈ、第五の突起部３２０ａ、第五の穴部３１１ａとは周方向で異なる位置に保持環３２０の第四の鍔部３２０ｉが固定筒３１１の内径側に配置される。   Further, the fourth collar 320i of the holding ring 320 is disposed on the inner diameter side of the fixed cylinder 311 at a position different from the third collar 320h, the fifth protrusion 320a, and the fifth hole 311a in the circumferential direction. The

鍔部３２０ｉから光軸直行方向で外径側に突出し第六の突起部２０ｂが形成される。固定筒３１１には第六の突起部２０ｂが挿入される第六の穴部１１ｂが形成される。保持環３２０の第五の突起部３２０ａの物体側の壁面３２０ｃと、固定筒３１１の第五の穴部３１１ａの物体側の壁面３１１ｃは光軸方向に微小な隙間を有している。操作環３２０の第六の突起部３２０ｂの物体側の壁面３２０ｄと固定筒３１１の第六の穴部３１１ｂの物体側の壁面１１ｄは光軸方向に微小な隙間を有している。   A sixth protrusion 20b is formed protruding from the flange 320i to the outer diameter side in the direction orthogonal to the optical axis. The fixed tube 311 is formed with a sixth hole portion 11b into which the sixth protrusion 20b is inserted. The object-side wall surface 320c of the fifth protrusion 320a of the holding ring 320 and the object-side wall surface 311c of the fifth hole 311a of the fixed cylinder 311 have a minute gap in the optical axis direction. The object-side wall surface 320d of the sixth projection 320b of the operation ring 320 and the object-side wall surface 11d of the sixth hole 311b of the fixed cylinder 311 have a minute gap in the optical axis direction.

第六の突起部３２０ｂの物体側壁面３２０ｄの内径側の根元には斜面３２０ｅが形成されており、固定筒３１１の第六の穴部３１１ｂの物体側の壁面３１１ｄの内径側には斜面３２０ｅに対応するように斜面３１１ｅが形成されている。保持環３２０の端面３２０ｆと斜面３２０ｅの間の光軸方向寸法は固定筒３１１の端面３１１ｆと斜面３１１ｅの間の光軸方向寸法より若干小さくなるように設定されている。   A slope 320e is formed at the inner diameter side base of the object side wall surface 320d of the sixth protrusion 320b, and the slope 320e is formed on the inner diameter side of the object side wall surface 311d of the sixth hole 311b of the fixed cylinder 311. A slope 311e is formed so as to correspond. The dimension in the optical axis direction between the end surface 320f of the holding ring 320 and the inclined surface 320e is set to be slightly smaller than the dimension in the optical axis direction between the end surface 311f of the fixed cylinder 311 and the inclined surface 311e.

これにより保持環３２０の第六の突起部３２０ｂが固定筒３１１の第六の穴部３１１ｂに挿入されると保持環３２０は光軸方向撮像面側に付勢される。このとき固定筒３１１の第五の穴部３１１ａの物体側の橋部３１１ｉは、保持環３２０の斜面３２０ｅが固定筒３１１の斜面３１１ｅを付勢することにより光軸方向物体側に変形するように形成されている。   As a result, when the sixth protrusion 320 b of the holding ring 320 is inserted into the sixth hole 311 b of the fixed cylinder 311, the holding ring 320 is urged toward the imaging surface side in the optical axis direction. At this time, the bridge 311i on the object side of the fifth hole 311a of the fixed cylinder 311 is deformed to the object side in the optical axis direction by the inclined surface 320e of the holding ring 320 urging the inclined surface 311e of the fixed cylinder 311. Is formed.

以上の構成により摺動面である固定筒３１１の端面３１１ｇおよび保持環３２０の端面３２０ｇの平面度と固定筒３１１の外径部３１１ｈの真円度の低下が抑えられる。これによりフォーカス操作環１９の操作感は良好となる。さらに保持環３２０の突起部３２０ａおよび３２０ｂが固定筒３１１の穴部３１１ａ、３１１ｂから抜けて保持環２０が固定筒１１から外れることを防止できる。   With the above configuration, the flatness of the end surface 311g of the fixed cylinder 311 and the end surface 320g of the holding ring 320, which are sliding surfaces, and the roundness of the outer diameter portion 311h of the fixed cylinder 311 are suppressed. Thereby, the feeling of operation of the focus operation ring 19 is improved. Further, the protrusions 320 a and 320 b of the holding ring 320 can be prevented from coming off from the holes 311 a and 311 b of the fixed cylinder 311 and the holding ring 20 being detached from the fixed cylinder 11.

上記実施例３では、保持環３２０の第三の鍔部３２０ｈ、第四の鍔部３２０ｉに第五の突起部３２０ａ、第六の突起部２０ｂを形成し、固定筒３１１に第五の穴部３１１ａ、第六の穴部１１ｂを形成したが、逆に保持環３２０の第三の鍔部３２０ｈ、第四の鍔部３２０ｉに穴部をそれぞれ１つずつ形成し、固定筒３１１の対応する位置に突起部をそれぞれ形成しても良い。   In the third embodiment, the fifth protrusion 320 a and the sixth protrusion 20 b are formed on the third flange portion 320 h and the fourth flange portion 320 i of the holding ring 320, and the fifth hole portion is formed in the fixed cylinder 311. 311a and the sixth hole portion 11b are formed, but conversely, one hole portion is formed in each of the third flange portion 320h and the fourth flange portion 320i of the holding ring 320, and corresponding positions of the fixed cylinder 311 are formed. Each of the protrusions may be formed on the surface.

また、実施例１、２、３では鍔部と突起部、穴部がそれぞれ最低限必要な個数で説明したが周方向に多数配置しても良い。また、実施例１、２、３では保持環と固定筒のうち一方に突起部、他方に穴部を形成したが保持環と固定筒のそれぞれに突起部と穴部の両方を形成しても良い。   In the first, second, and third embodiments, the minimum number of collars, protrusions, and holes has been described, but a large number may be arranged in the circumferential direction. Further, in Examples 1, 2, and 3, a protrusion is formed on one of the holding ring and the fixed cylinder, and a hole is formed on the other. However, both the protrusion and the hole may be formed on each of the holding ring and the fixed cylinder. good.

本実施形態では、一眼レフフィルムカメラに用いられる交換レンズについて説明したが、本発明は、レンズシャッタカメラ、デジタルカメラ、ビデオカメラ等の各種撮影装置（光学機器）のレンズ鏡筒部分に用いることができる。   In the present embodiment, an interchangeable lens used in a single-lens reflex film camera has been described. However, the present invention can be used in a lens barrel portion of various photographing apparatuses (optical devices) such as a lens shutter camera, a digital camera, and a video camera. it can.

以上、本実施形態について説明したが、本発明は本実施形態に限定されず、その要旨の範囲内で種々の変形及び変更が可能である。   As mentioned above, although this embodiment was described, this invention is not limited to this embodiment, A various deformation | transformation and change are possible within the range of the summary.

本発明は、一眼レフカメラ、ビデオカメラ等の光学機器やレンズ鏡筒の用途に適用することができる。   The present invention can be applied to uses of optical devices such as single-lens reflex cameras and video cameras, and lens barrels.

１１ 固定筒（固定筒）、１９ フォーカス操作環（操作環）、
２０ 保持環（保持環）、１１ｆ 端面（第二の当接面）、
１１ｈ 外径部（第二の摺動面）、１１ｃ 壁面（第二の壁部）、
２０ｇ 壁面（第一の摺動面）、２０ｆ 端面（第一の当接面）、
２０ｃ 壁面（第一の壁部） 11 fixed cylinder (fixed cylinder), 19 focus operation ring (operation ring),
20 retaining ring (holding ring), 11f end surface (second contact surface),
11h outer diameter part (second sliding surface), 11c wall surface (second wall part),
20g wall surface (first sliding surface), 20f end surface (first contact surface),
20c Wall surface (first wall)

Claims (7)

固定筒と保持環により光軸方向に挟み込まれて回転可能に保持された操作環を有するレンズ鏡筒において、
前記保持環は前記固定筒と光軸方向で当接される第一の当接面と、
前記操作環と当接して摺動する第一の摺動面と、
光軸と直行し前記保持環が前記固定筒に組み込まれる方向と反対側に平面部を有する第一の壁部と、を有し、
前記固定筒は前記保持環と光軸方向で当接される第二の当接面と、
前記操作環と当接して摺動する第二の摺動面と、
光軸と直行し前記保持環が前記固定筒に組み込まれる方向と同じ側に平面部を有する第二の壁部と、を有し、
前記保持環が前記固定筒に組み込まれると前記保持環と前記固定筒のうちいずれか一方の一部が弾性変形して第一の当接面が前記第二の当接面に対して光軸方向に付勢され、
第一の摺動面と第二の摺動面は前記弾性変形による面の変形が小さい位置に構成され、
前記保持環が前記固定筒に組み込まれた状態で第一の壁部と第二の壁部は光軸方向に微小な隙間を有することを特徴とするレンズ鏡筒。 In a lens barrel having an operation ring that is sandwiched in the optical axis direction by a fixed cylinder and a holding ring and is held rotatably.
The holding ring is a first contact surface that contacts the fixed cylinder in the optical axis direction;
A first sliding surface that slides in contact with the operating ring;
A first wall portion that is perpendicular to the optical axis and has a flat portion on the side opposite to the direction in which the holding ring is incorporated in the fixed cylinder,
The fixed cylinder is in contact with the holding ring in the optical axis direction;
A second sliding surface that slides in contact with the operating ring;
A second wall portion perpendicular to the optical axis and having a flat portion on the same side as the direction in which the retaining ring is incorporated in the fixed cylinder,
When the holding ring is incorporated into the fixed cylinder, a part of either the holding ring or the fixed cylinder is elastically deformed so that the first contact surface is an optical axis with respect to the second contact surface. Biased in the direction,
The first sliding surface and the second sliding surface are configured at positions where the deformation of the surface due to the elastic deformation is small,
A lens barrel characterized in that the first wall portion and the second wall portion have a minute gap in the optical axis direction in a state where the holding ring is incorporated in the fixed tube. 前記保持環は前記固定筒の内径側に配置される第一の鍔部と、
前記第一の鍔部から光軸に直行する方向で外径側に突出し、前記第一の壁部を有する第一の突起部と、
前記第一の突起部と光軸方向に並び前記第一の当接面からの距離が第一の突起部より遠い位置に配置された第二の突起部と、を有し、
前記固定筒は前記第二の壁部を有し光軸方向に隙間を有した状態で前記第一の突起部が挿入される第一の穴部と、
前記第二の突起部が挿入されると前記第一の当接面が前記第二の当接面に対して光軸方向に付勢されるように形成された第二の穴部と、を有することを特徴とする請求項１に記載のレンズ鏡筒。 The holding ring is a first flange portion disposed on the inner diameter side of the fixed cylinder;
A first protrusion that protrudes from the first flange portion toward the outer diameter side in a direction perpendicular to the optical axis, and has the first wall portion;
A first protrusion and a second protrusion arranged at a position farther from the first protrusion than the first protrusion along the optical axis direction;
The fixed cylinder has the second hole and a first hole into which the first protrusion is inserted with a gap in the optical axis direction;
A second hole formed so that when the second protrusion is inserted, the first contact surface is biased in the optical axis direction with respect to the second contact surface; The lens barrel according to claim 1, wherein the lens barrel is provided. 前記固定筒は光軸に直行する方向で内径側に突出し、前記第一の壁部を有する第三の突起部と、
前記第三の突起部と光軸方向に並び前記第二の当接面からの距離が第三の突起部より近い位置に配置された第四の突起部と、を有し、
前記保持環は前記固定筒の内径側に配置される第二の鍔部と、
前記第二の壁部を有し前記第二の鍔部から光軸方向に隙間を有した状態で前記第三の突起部が挿入される第三の穴部と、
前記第四の突起部が挿入されると前記第一の当接面が前記第二の当接面に対して光軸方向に付勢されるように形成された第四の穴部と、を有することを特徴とする請求項１に記載のレンズ鏡筒。 The fixed cylinder protrudes toward the inner diameter side in a direction perpendicular to the optical axis, and a third protrusion having the first wall;
A fourth protrusion arranged at a position closer to the third protrusion and a distance from the second contact surface aligned with the third protrusion in the optical axis direction;
The holding ring is a second collar portion disposed on the inner diameter side of the fixed cylinder;
A third hole into which the third protrusion is inserted in a state having a gap in the optical axis direction from the second flange portion having the second wall portion;
A fourth hole formed so that when the fourth protrusion is inserted, the first contact surface is biased in the optical axis direction with respect to the second contact surface; The lens barrel according to claim 1, wherein the lens barrel is provided. 前記保持環は前記固定筒の内径側に配置される第三の鍔部と、
前記第三の鍔部から光軸に直行する方向で外径側に突出し、前記第一の壁部を有する第五の突起部と、
前記第五の突起部と周方向で異なる位置に配置された第六の突起部と、を有し、
前記固定筒は前記第二の壁部を有し光軸方向に隙間を有した状態で前記第五の突起部が挿入される第五の穴部と、
前記第六の突起部が挿入されると前記第一の当接面が前記第二の当接面に対して光軸方向に付勢されるように形成された第六の穴部と、を有することを特徴とする請求項１に記載のレンズ鏡筒。 The retaining ring is a third flange disposed on the inner diameter side of the fixed cylinder,
A fifth protrusion having a first wall portion protruding from the third flange portion to the outer diameter side in a direction perpendicular to the optical axis;
The fifth protrusion and the sixth protrusion disposed at a different position in the circumferential direction,
The fixed tube has the second wall portion and a fifth hole portion into which the fifth protrusion portion is inserted in a state having a gap in the optical axis direction;
A sixth hole formed so that when the sixth protrusion is inserted, the first contact surface is biased in the optical axis direction with respect to the second contact surface; The lens barrel according to claim 1, wherein the lens barrel is provided. 前記固定筒は光軸に直行する方向で内径側に突出し、前記第一の壁部を有する第七の突起部と、
前記第七の突起部と周方向で異なる位置に配置された第八の突起部と、を有し、
前記保持環は前記固定筒の内径側に配置される第四の鍔部と、
前記第二の壁部を有し前記第四の鍔部から光軸方向に隙間を有した状態で前記第七の突起部が挿入される第七の穴部と、
前記第八の突起部が挿入されると前記第一の当接面が前記第二の当接面に対して光軸方向に付勢されるように形成された第八の穴部と、を有することを特徴とする請求項１に記載のレンズ鏡筒。 The fixed cylinder protrudes toward the inner diameter side in a direction perpendicular to the optical axis, and a seventh protrusion having the first wall;
An eighth protrusion disposed at a different position in the circumferential direction from the seventh protrusion,
The retaining ring is a fourth flange disposed on the inner diameter side of the fixed cylinder;
A seventh hole into which the seventh protrusion is inserted in a state having a gap in the optical axis direction from the fourth flange with the second wall;
An eighth hole formed so that when the eighth protrusion is inserted, the first contact surface is biased in the optical axis direction with respect to the second contact surface; The lens barrel according to claim 1, wherein the lens barrel is provided. 第一乃至第二の当接面と、
第一乃至第二の壁部と、
前記第一乃至第八の突起部と、
前記第一乃至第八の穴部は周方向に複数配置されることを特徴とする請求項１乃至請求項５の何れか一項に記載のレンズ鏡筒。 First to second contact surfaces;
First to second walls,
The first to eighth protrusions;
The lens barrel according to any one of claims 1 to 5, wherein a plurality of the first to eighth holes are arranged in the circumferential direction. 請求項１乃至請求項６の何れか一項に記載のレンズ鏡筒と、
前記レンズ鏡筒が装着可能なカメラ本体と、
を有することを特徴とする光学機器。 The lens barrel according to any one of claims 1 to 6,
A camera body to which the lens barrel can be attached;
An optical apparatus comprising:
JP2016135533A 2016-07-08 2016-07-08 Lens barrel and optical instrument Pending JP2018005135A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021036278A (en) * 2019-08-30 2021-03-04 キヤノン株式会社 Optical device and imaging apparatus
JP2022186729A (en) * 2019-03-07 2022-12-15 日本電気株式会社 Image capturing device, image capturing method, and program

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022186729A (en) * 2019-03-07 2022-12-15 日本電気株式会社 Image capturing device, image capturing method, and program
US11930265B2 (en) 2019-03-07 2024-03-12 Nec Corporation Photographing apparatus, photographing method, and storage medium having program stored therein
JP2021036278A (en) * 2019-08-30 2021-03-04 キヤノン株式会社 Optical device and imaging apparatus
US11782233B2 (en) 2019-08-30 2023-10-10 Canon Kabushiki Kaisha Optical apparatus and image pickup apparatus
JP7425564B2 (en) 2019-08-30 2024-01-31 キヤノン株式会社 Optical devices and imaging devices

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