JP2021051127A - Lens barrel and imaging apparatus - Google Patents

Lens barrel and imaging apparatus Download PDF

Info

Publication number
JP2021051127A
JP2021051127A JP2019172630A JP2019172630A JP2021051127A JP 2021051127 A JP2021051127 A JP 2021051127A JP 2019172630 A JP2019172630 A JP 2019172630A JP 2019172630 A JP2019172630 A JP 2019172630A JP 2021051127 A JP2021051127 A JP 2021051127A
Authority
JP
Japan
Prior art keywords
friction member
conductive member
conductive portion
spiral conductive
lens barrel
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.)
Granted
Application number
JP2019172630A
Other languages
Japanese (ja)
Other versions
JP7319879B2 (en
Inventor
諒 加々見
Ryo Kagami
諒 加々見
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tamron Co Ltd
Original Assignee
Tamron Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tamron Co Ltd filed Critical Tamron Co Ltd
Priority to JP2019172630A priority Critical patent/JP7319879B2/en
Publication of JP2021051127A publication Critical patent/JP2021051127A/en
Application granted granted Critical
Publication of JP7319879B2 publication Critical patent/JP7319879B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Lens Barrels (AREA)

Abstract

To provide a lens barrel that can prevent movement of a lens due to the weight of the lens without increasing an operation torque at the time of a zooming operation or a focusing operation.SOLUTION: The lens barrel includes: a cylinder body 8 in which a cam groove 18 is formed; and a lens frame 10 having a cam follower 12 formed to stand in the cam groove 18, and drives a lens by moving the lens frame 10 in an axial direction to the cylinder body 8. The lens barrel also includes: a first spiral conductive member 20C along one edge of the cam groove 18; a second spiral conductive member 22B along the other edge of the cam groove 18; a first frictional member 16A attached to the first conductive member; and a switch 6 for switching a state of applying a current to the first conductive member 20C and to the second conductive member 22B.SELECTED DRAWING: Figure 4

Description

本発明は、レンズ装置及び撮像装置に関する。 The present invention relates to a lens device and an imaging device.

カメラなどのレンズ鏡筒のズーミング又はフォーカシングするための構成として、筒体にカム溝を形成し、レンズを保持するレンズ枠にカムフォロアを立設しておき、カムフォロアをカム溝に沿って移動させることにより筒体に対してレンズ枠を移動させる構成が知られている。このような構成のレンズ鏡筒では、例えば、夜空を撮影するためにレンズ鏡筒を上方に向けたり、地上の草花等を撮影するためにレンズ鏡筒を下方に向けたりすると、レンズ等の自重によりレンズ枠が筒体に対して移動してしまう。 As a configuration for zooming or focusing of a lens barrel of a camera or the like, a cam groove is formed in the cylinder, a cam follower is erected on a lens frame holding a lens, and the cam follower is moved along the cam groove. It is known that the lens frame is moved with respect to the tubular body. In a lens barrel having such a configuration, for example, when the lens barrel is directed upward to photograph the night sky or the lens barrel is directed downward to photograph flowers on the ground, the weight of the lens or the like is reduced. As a result, the lens frame moves with respect to the cylinder.

これに対して、従来は、筒体と操作環の間に摩擦部材を配置し、筒体と操作環の間に生じる摩擦力を大きくすることにより、自重によるレンズの移動を防止している。また、例えば、特許文献１には、カムフォロアに付勢部材を設けておき、付勢部材によりカムフォロアをカム溝の壁面に押圧する構成が開示されている。特許文献１に記載されているような構成によっても、カム溝とカムフォロアの摩擦が大きくなるため、自重によるレンズの移動を防止することができる。 On the other hand, conventionally, a friction member is arranged between the cylinder and the operation ring to increase the frictional force generated between the cylinder and the operation ring, thereby preventing the lens from moving due to its own weight. Further, for example, Patent Document 1 discloses a configuration in which a cam follower is provided with an urging member and the cam follower is pressed against the wall surface of the cam groove by the urging member. Even with the configuration as described in Patent Document 1, the friction between the cam groove and the cam follower becomes large, so that the movement of the lens due to its own weight can be prevented.

特開２０１９−５３１４５号公報JP-A-2019-53145

しかしながら、上記のように摩擦力を大きくしてしまうと操作トルクが重くなり、ズーミング又はフォーカシング操作に負担となってしまう。このため、ズーミング又はフォーカシング操作時における操作トルクを大きくすることなく、自重によるレンズの移動を防止できるレンズ鏡筒が望まれている。 However, if the frictional force is increased as described above, the operating torque becomes heavy, which imposes a burden on the zooming or focusing operation. Therefore, there is a demand for a lens barrel that can prevent the lens from moving due to its own weight without increasing the operating torque during the zooming or focusing operation.

本発明は、上記の課題に鑑みなされたものであり、ズーミング又はフォーカシング操作時における操作トルクを大きくすることなく、自重によるレンズの移動を防止できるレンズ鏡筒を提供することを目的としている。 The present invention has been made in view of the above problems, and an object of the present invention is to provide a lens barrel capable of preventing movement of a lens due to its own weight without increasing an operating torque during a zooming or focusing operation.

本発明のレンズ鏡筒は、ガイド溝が形成された筒体と、ガイド溝に入り込むように立設されたカムフォロアを有する移動体とを備え、筒体に対して移動体を軸方向に移動させてレンズを駆動させるレンズ鏡筒であって、ガイド溝の一方の縁に沿って設けられた第１の導電部材と、ガイド溝の他方の縁に沿って設けられた第２の導電部材と、前記第１の導電部材に取り付けられた第１の摩擦部材と、第１の導電部材及び第２の導電部材に対する電流の印加状態を切り替える切替手段と、を備えている、ことを特徴とする。 The lens barrel of the present invention includes a cylinder having a guide groove formed therein and a moving body having a cam follower erected so as to enter the guide groove, and the moving body is moved in the axial direction with respect to the cylinder. A first conductive member provided along one edge of the guide groove and a second conductive member provided along the other edge of the guide groove, which is a lens barrel for driving the lens. It is characterized in that it includes a first friction member attached to the first conductive member, and a switching means for switching a state in which a current is applied to the first conductive member and the second conductive member.

上記構成の本発明によれば、第１の導電部材及び第２の導電部材に電流を流すことにより、第１の導電部材及び第２の導電部材を近接又は離間させて、第１の摩擦部材とカムフォロアとの間の摩擦力が大きい状態と、摩擦力がない又は小さい状態とを切り替えることができる。これにより、撮影者の操作時にはカムフォロアと第１の摩擦部材との間の摩擦力がない又は小さい状態とすることにより、操作トルクが小さくなり、スムーズな操作が可能になる。また、ズーム状態（又はフォーカス状態）を固定する場合にはカムフォロアと第１の摩擦部材との間の摩擦力が大きい状態とすることにより、操作トルクを大きくして、移動体の移動範囲の任意の位置において自重によるレンズの移動を防止できる。 According to the present invention having the above configuration, the first conductive member and the second conductive member are brought close to each other or separated from each other by passing an electric current through the first conductive member and the second conductive member, and the first friction member. It is possible to switch between a state in which the frictional force between the vehicle and the cam follower is large and a state in which the frictional force is not or is small. As a result, when the photographer operates the cam follower and the first friction member, the frictional force between the cam follower and the first friction member is reduced or reduced, so that the operating torque is reduced and smooth operation is possible. Further, when the zoom state (or focus state) is fixed, the operating torque is increased by setting the frictional force between the cam follower and the first friction member to be large, and the moving range of the moving body is arbitrary. It is possible to prevent the lens from moving due to its own weight at the position of.

本発明のレンズ鏡筒は、ガイド溝が形成された筒体と、ガイド溝に入り込むように立設されたカムフォロアを有する移動体とを備え、筒体に対して移動体を軸方向に移動させてレンズを駆動させるレンズ鏡筒であって、ガイド溝の一方の縁に沿って設けられた第１の摩擦部材と、第１の摩擦部材に沿うように、かつ、第１の摩擦部材に幅方向に並ぶように取り付けられた第１の導電部材及び第２の導電部材と、第１の導電部材及び第２の導電部材に対する電流の印加状態を切り替える切替手段と、を備えている、ことを特徴とする。 The lens barrel of the present invention includes a cylinder having a guide groove formed therein and a moving body having a cam follower erected so as to enter the guide groove, and the moving body is moved in the axial direction with respect to the cylinder. A lens barrel for driving a lens, the width of a first friction member provided along one edge of a guide groove, along the first friction member, and the width of the first friction member. It is provided with a first conductive member and a second conductive member mounted so as to be arranged in a direction, and a switching means for switching an application state of a current to the first conductive member and the second conductive member. It is a feature.

上記構成の本発明によれば、第１の導電部材及び第２の導電部材に電圧を印加することにより、第１の導電部材及び第２の導電部材が近接又は離間させて、第１の摩擦部材とカムフォロアとの間の摩擦力が大きい状態と、摩擦力がない又は小さい状態とを切り替えることができる。これにより、撮影者の操作時にはカムフォロアと第１の摩擦部材との間の摩擦力がない又は小さい状態とすることにより、操作トルクが小さくなり、スムーズな操作が可能になる。また、ズーム状態（又はフォーカス状態）を固定する場合にはカムフォロアと第１の摩擦部材との間の摩擦力が大きい状態とすることにより、操作トルクを大きくして、移動体の移動範囲の任意の位置において自重によるレンズの移動を防止できる。 According to the present invention having the above configuration, by applying a voltage to the first conductive member and the second conductive member, the first conductive member and the second conductive member are brought close to each other or separated from each other, and the first friction It is possible to switch between a state in which the frictional force between the member and the cam follower is large and a state in which the frictional force is not or is small. As a result, when the photographer operates the cam follower and the first friction member, the frictional force between the cam follower and the first friction member is reduced or reduced, so that the operating torque is reduced and smooth operation is possible. Further, when the zoom state (or focus state) is fixed, the operating torque is increased by setting the frictional force between the cam follower and the first friction member to be large, and the moving range of the moving body is arbitrary. It is possible to prevent the lens from moving due to its own weight at the position of.

本発明によれば、ズーミング又はフォーカシング操作時における操作トルクを大きくすることなく、自重によるレンズの移動を防止できるレンズ鏡筒が提供される。 According to the present invention, there is provided a lens barrel capable of preventing the movement of a lens due to its own weight without increasing the operating torque during a zooming or focusing operation.

本発明の第１実施形態によるレンズ鏡筒を有する撮像装置を示す構成図である。It is a block diagram which shows the image pickup apparatus which has the lens barrel according to 1st Embodiment of this invention. 本発明の第１実施形態によるレンズ鏡筒のレンズの駆動機構を示す斜視図である。It is a perspective view which shows the drive mechanism of the lens of the lens barrel according to 1st Embodiment of this invention. 本発明の第１実施形態によるレンズ鏡筒のレンズの駆動機構を示す分解斜視図である。It is an exploded perspective view which shows the drive mechanism of the lens of the lens barrel according to 1st Embodiment of this invention. 図２におけるＩＶ−ＩＶ断面図である。FIG. 2 is a sectional view taken along line IV-IV in FIG. 図３に示すレンズ鏡筒のレンズ駆動機構の導電部材アセンブリを示す斜視図である。It is a perspective view which shows the conductive member assembly of the lens drive mechanism of the lens barrel shown in FIG. 逆電流状態における第１の螺旋状導電部及び第２の螺旋状導電部に流れる電流と磁場を示す側面概略図である。It is a side schematic view which shows the current and the magnetic field flowing through the 1st spiral conductive part and the 2nd spiral conductive part in the reverse current state. 逆電流状態における第１の螺旋状導電部及び第２の螺旋状導電部に流れる電流と磁場を示す軸方向断面図である。FIG. 5 is an axial sectional view showing a current and a magnetic field flowing through the first spiral conductive portion and the second spiral conductive portion in a reverse current state. 順電流状態における第１の螺旋状導電部及び第２の螺旋状導電部に流れる電流と磁場を示す側面概略図である。It is a side schematic view which shows the electric current and the magnetic field flowing through the 1st spiral conductive part and the 2nd spiral conductive part in the forward current state. 順電流状態における第１の螺旋状導電部及び第２の螺旋状導電部に流れる電流と磁場を示す軸方向断面図である。FIG. 5 is an axial sectional view showing a current and a magnetic field flowing through the first spiral conductive portion and the second spiral conductive portion in a forward current state. 本発明の第２実施形態によるレンズ鏡筒におけるレンズの駆動機構の図４に対応する断面図である。It is sectional drawing corresponding to FIG. 4 of the drive mechanism of the lens in the lens barrel according to the 2nd Embodiment of this invention. 本発明の第２実施形態によるレンズ鏡筒のレンズの駆動機構の導電部材アセンブリを示す斜視図である。It is a perspective view which shows the conductive member assembly of the drive mechanism of the lens of the lens barrel by 2nd Embodiment of this invention. 本発明の第３実施形態によるレンズ鏡筒におけるレンズの駆動機構の図４に対応する断面図である。It is sectional drawing corresponding to FIG. 4 of the drive mechanism of the lens in the lens barrel according to the 3rd Embodiment of this invention. 本発明の第３実施形態によるレンズ鏡筒のレンズの駆動機構の導電部材アセンブリを示す斜視図である。It is a perspective view which shows the conductive member assembly of the drive mechanism of the lens of the lens barrel according to the 3rd Embodiment of this invention. 図１１のＢ部の拡大図である。It is an enlarged view of the part B of FIG.

＜第１実施形態＞
以下、本発明のレンズ鏡筒の第１実施形態を、図面を参照しながら詳細に説明する。なお、以下の説明では、ズーミングのためにレンズを駆動するための機構に本発明を適用した場合ついて説明するが、フォーカシングのためにレンズを駆動するための機構に本発明を適用することも可能である。 <First Embodiment>
Hereinafter, the first embodiment of the lens barrel of the present invention will be described in detail with reference to the drawings. In the following description, the case where the present invention is applied to a mechanism for driving a lens for zooming will be described, but the present invention can also be applied to a mechanism for driving a lens for focusing. Is.

図１は、本発明の第１実施形態によるレンズ鏡筒を有する撮像装置を示す構成図である。撮像装置１は、例えば、カメラなどであり、撮像装置本体２と、撮像装置本体２に取り付けられたレンズ鏡筒４とを備える。撮像装置本体２は、内部にＣＭＯＳなどのイメージセンサを有し、レンズ鏡筒４を通じて入射した光を受光して撮像する。撮像装置本体２には、内部に電池などのバッテリー（電流印加装置）２Ａと、撮影者が操作可能なスイッチ（切替手段）６と、が設けられている。 FIG. 1 is a configuration diagram showing an image pickup apparatus having a lens barrel according to the first embodiment of the present invention. The image pickup device 1 is, for example, a camera or the like, and includes an image pickup device main body 2 and a lens barrel 4 attached to the image pickup device main body 2. The image pickup apparatus main body 2 has an image sensor such as CMOS inside, and receives light incident through the lens barrel 4 to take an image. The image pickup apparatus main body 2 is provided with a battery (current application device) 2A such as a battery and a switch (switching means) 6 that can be operated by the photographer.

図２は、本発明の第１実施形態によるレンズ鏡筒のレンズの駆動機構を示す斜視図である。図３は、本発明の第１実施形態によるレンズ鏡筒のレンズの駆動機構を示す分解斜視図である。また、図４は、図２におけるＩＶ−ＩＶ断面図である。
図２〜図４に示すように、レンズ鏡筒４は、カム筒８と、縦溝筒７と、レンズ枠（移動体）１０と、導電部材アセンブリ１４と、摩擦部材アセンブリ１６と、を備える。 FIG. 2 is a perspective view showing a driving mechanism of a lens of a lens barrel according to the first embodiment of the present invention. FIG. 3 is an exploded perspective view showing a driving mechanism of the lens of the lens barrel according to the first embodiment of the present invention. Further, FIG. 4 is a sectional view taken along line IV-IV in FIG.
As shown in FIGS. 2 to 4, the lens barrel 4 includes a cam cylinder 8, a vertical groove cylinder 7, a lens frame (moving body) 10, a conductive member assembly 14, and a friction member assembly 16. ..

カム筒８は、円筒形状に形成されており、等角度間隔で３本のカム溝１８が形成されている。各カム溝１８は、カム筒８の後方から螺旋状に延びており、カム筒８の半径方向外面から半径方向内面まで貫通している。図４に示すように、カム筒８の半径方向外面のカム溝１８の両側にはカム溝１８に沿うように切り欠き部２４Ａ、２４Ｂが形成されている。切り欠き部２４Ａ、２４Ｂは、幅方向断面において矩形状の断面形状を有する。 The cam cylinder 8 is formed in a cylindrical shape, and three cam grooves 18 are formed at equal intervals. Each cam groove 18 extends spirally from the rear of the cam cylinder 8 and penetrates from the radial outer surface to the radial inner surface of the cam cylinder 8. As shown in FIG. 4, notches 24A and 24B are formed on both sides of the cam groove 18 on the outer surface of the cam cylinder 8 in the radial direction along the cam groove 18. The cutout portions 24A and 24B have a rectangular cross-sectional shape in the cross-sectional direction in the width direction.

縦溝筒７は、円筒状に形成されており、等角度間隔で３本の縦溝１７が形成されている。各縦溝１７は、縦溝筒７の後方から光軸に平行に直線状に延びており、縦溝筒７の半径方向外面から半径方向内面まで貫通している。縦溝筒７は、例えば、マウント等を介してカメラ本体に固定されている。縦溝筒７は、カム筒８内側に同軸に配置されており、カム筒８は縦溝筒７に対して回転可能である。 The vertical groove cylinder 7 is formed in a cylindrical shape, and three vertical grooves 17 are formed at equal angular intervals. Each vertical groove 17 extends linearly from the rear of the vertical groove cylinder 7 in parallel with the optical axis, and penetrates from the radial outer surface to the radial inner surface of the vertical groove cylinder 7. The vertical groove cylinder 7 is fixed to the camera body via, for example, a mount or the like. The vertical groove cylinder 7 is coaxially arranged inside the cam cylinder 8, and the cam cylinder 8 is rotatable with respect to the vertical groove cylinder 7.

レンズ枠１０は、円環状の板材からなり、中心の孔にレンズが取り付けられている。レンズ枠１０の半径方向外周面には当角度間隔で３つのカムフォロア１２が立設されている。カムフォロア１２は中心軸にそって貫通孔を備え、この貫通孔にビス１２Ｃが挿入されてレンズ枠に固定されている。カムフォロア１２は、カム筒８のカム溝１８及び縦溝筒７の縦溝７を挿通して、レンズ枠１０に取り付けられている。これにより、縦溝筒７に対してカム筒８が回転されることにより、カムフォロア１２が縦溝筒７の縦溝１７に沿ってガイドされて、レンズ枠１０が光軸方向に移動する。 The lens frame 10 is made of an annular plate material, and a lens is attached to a hole in the center. Three cam followers 12 are erected on the outer peripheral surface of the lens frame 10 in the radial direction at equal intervals. The cam follower 12 has a through hole along the central axis, and a screw 12C is inserted into the through hole and fixed to the lens frame. The cam follower 12 is attached to the lens frame 10 by inserting the cam groove 18 of the cam cylinder 8 and the vertical groove 7 of the vertical groove cylinder 7. As a result, the cam cylinder 8 is rotated with respect to the vertical groove cylinder 7, so that the cam follower 12 is guided along the vertical groove 17 of the vertical groove cylinder 7, and the lens frame 10 moves in the optical axis direction.

図５は、図３に示すレンズ鏡筒のレンズ駆動機構の導電部材アセンブリを示す斜視図である。図５に示すように、導電部材アセンブリ１４は、第１の導電部材２０と、３つの第２の導電部材２２とを備える。第１の導電部材２０は、円環状の円環部２０Ａと、円環部２０Ａから半径方向外方に延びる突部２０Ｂと、突部２０Ｂの半径方向外端から対物側に螺旋状に延びる第１の螺旋状導電部２０Ｃとを備える。円環部２０Ａは、内径がカム筒８の内径と略等しく、また、幅がカム筒８の厚さよりも小さくなるように形成されている。突部２０Ｂは円環部２０Ａの外周から等角度間隔で突出しており、中心から半径方向外端までの距離が、カム筒８の中心から切り欠き部２４Ａ、２４Ｂの底面までの距離と略等しくなっている。第１の螺旋状導電部２０Ｃは、例えば、銅などの導電材料からなりカム溝１８と同形状で同じ長さ延びている。 FIG. 5 is a perspective view showing a conductive member assembly of the lens driving mechanism of the lens barrel shown in FIG. As shown in FIG. 5, the conductive member assembly 14 includes a first conductive member 20 and three second conductive members 22. The first conductive member 20 has an annular ring portion 20A, a protrusion 20B extending radially outward from the ring portion 20A, and a protrusion 20B spirally extending from the radial outer end of the protrusion 20B toward the objective side. It is provided with the spiral conductive portion 20C of 1. The annular portion 20A is formed so that the inner diameter is substantially equal to the inner diameter of the cam cylinder 8 and the width is smaller than the thickness of the cam cylinder 8. The protrusions 20B project from the outer circumference of the annular portion 20A at equal angular intervals, and the distance from the center to the outer edge in the radial direction is substantially equal to the distance from the center of the cam cylinder 8 to the bottom surfaces of the notches 24A and 24B. It has become. The first spiral conductive portion 20C is made of a conductive material such as copper, has the same shape as the cam groove 18, and extends the same length.

第２の導電部材２２は、それぞれ、円弧状に延びる円弧状部２２Ａと、円弧状部２２Ａの周方向一端部の半径方向外方の縁から対物側に螺旋状に延びる第２の螺旋状導電部２２Ｂとを備える。円弧状部２２Ａは、外径がカム筒８の中心から切り欠き部２４Ａ、２４Ｂの底面までの距離と略等しくなっている。第２の螺旋状導電部２２Ｂは、カム溝１８と同形状で同じ長さ延びている。第２の導電部材２２は、円弧状部２２Ａが第１の導電部材２０の隣接する突部２０Ｂの間を周方向に延びるように配置されている。これにより、第１の導電部材２０の第１の螺旋状導電部２０Ｃと、第２の導電部材２２の第２の螺旋状導電部２２Ｂとは略平行に螺旋状に延びる。なお、第１の導電部材２０と第２の導電部材２２とは、例えば、第１の導電部材２０の円環部２０Ａと、第２の導電部材２２の円弧状部２２Ａとの間に絶縁部材を介在させることにより、絶縁状態が維持されている。 The second conductive member 22 has an arcuate portion 22A extending in an arc shape and a second spiral conductive member spirally extending from the radial outer edge of one end portion in the circumferential direction of the arcuate portion 22A toward the objective side, respectively. A unit 22B is provided. The outer diameter of the arc-shaped portion 22A is substantially equal to the distance from the center of the cam cylinder 8 to the bottom surfaces of the cutout portions 24A and 24B. The second spiral conductive portion 22B has the same shape as the cam groove 18 and extends the same length. The second conductive member 22 is arranged so that the arcuate portion 22A extends in the circumferential direction between the adjacent protrusions 20B of the first conductive member 20. As a result, the first spiral conductive portion 20C of the first conductive member 20 and the second spiral conductive portion 22B of the second conductive member 22 extend spirally substantially in parallel. The first conductive member 20 and the second conductive member 22 are, for example, an insulating member between the annular portion 20A of the first conductive member 20 and the arcuate portion 22A of the second conductive member 22. The insulation state is maintained by interposing.

図３に示すように。摩擦部材アセンブリ１６は、３対の第１の摩擦部材１６Ａ及び第２の摩擦部材１６Ｂにより構成されている。第１の摩擦部材１６Ａ及び第２の摩擦部材１６Ｂは、例えば、ゴムなどの弾性部材により構成されている。第１の摩擦部材１６Ａ及び第２の摩擦部材１６Ｂの幅は、それぞれ、第１の導電部材２０の第１の螺旋状導電部２０Ｃ及び第２の導電部材２２の第２の螺旋状導電部２２Ｂの幅と等しくなっている。図４に示すように、第１の摩擦部材１６Ａは第１の導電部材２０の第１の螺旋状導電部２０Ｃの半径方向外面に取り付けられており、第２の摩擦部材１６Ｂは第２の導電部材２２の第２の螺旋状導電部２２Ｂの半径方向外面に取り付けられている。 As shown in FIG. The friction member assembly 16 is composed of three pairs of a first friction member 16A and a second friction member 16B. The first friction member 16A and the second friction member 16B are made of an elastic member such as rubber. The widths of the first friction member 16A and the second friction member 16B are the first spiral conductive portion 20C of the first conductive member 20 and the second spiral conductive portion 22B of the second conductive member 22, respectively. Is equal to the width of. As shown in FIG. 4, the first friction member 16A is attached to the radial outer surface of the first spiral conductive portion 20C of the first conductive member 20, and the second friction member 16B is the second conductive member 20. It is attached to the radial outer surface of the second spiral conductive portion 22B of the member 22.

図４に示すように、導電部材アセンブリ１４は、第１の導電部材２０の第１の螺旋状導電部２０Ｃが第１の切り欠き部２４Ａの半径方向の底面に当接するとともに、第２の導電部材２２の第２の螺旋状導電部２２Ｂが第２の切り欠き部２４Ｂの半径方向の底面に当接するように配置されている。そして、第１の導電部材２０の第１の螺旋状導電部２０Ｃ及び第１の摩擦部材１６Ａは、第１の切り欠き部２４Ａ内に収容されており、第２の導電部材２２の第２の螺旋状導電部２２Ｂ及び第２の摩擦部材１６Ｂは第２の切り欠き部２４Ｂ内に収容されている。なお、第１の摩擦部材１６Ａ及び第２の摩擦部材１６Ｂは、側面を第１の切り欠き部２４Ａ及び第２の切り欠き部２４Ｂの側壁に取り付けるなどの方法により、第１の切り欠き部２４Ａ及び第２の切り欠き部２４Ｂから離脱しないように保持されている。 As shown in FIG. 4, in the conductive member assembly 14, the first spiral conductive portion 20C of the first conductive member 20 abuts on the bottom surface of the first notch portion 24A in the radial direction, and the second conductive portion 20C is brought into contact with the bottom surface in the radial direction. The second spiral conductive portion 22B of the member 22 is arranged so as to abut on the bottom surface of the second notch portion 24B in the radial direction. The first spiral conductive portion 20C and the first friction member 16A of the first conductive member 20 are housed in the first notch portion 24A, and the second conductive member 22 has a second. The spiral conductive portion 22B and the second friction member 16B are housed in the second notch portion 24B. The first friction member 16A and the second friction member 16B have the first notch portion 24A by attaching the side surfaces to the side walls of the first notch portion 24A and the second notch portion 24B. And it is held so as not to separate from the second notch portion 24B.

図４に示すように、カムフォロア１２は、円筒状の軸部１２Ａと、軸部１２Ａよりも径が大きく軸部１２Ａの端部に接続された頭部１２Ｂとを備える。上述の通り、カムフォロア１２は、カム筒８のカム溝１８及び縦溝筒７の縦溝７を挿通して、レンズ枠１０に取り付けられている。カムフォロア１２の軸部１２Ａは、第１の摩擦部材１６Ａと第２の摩擦部材１６Ｂとの間に位置している。なお、カムフォロア１２の形状は円形に限らず、矩形状などにしてもよい。 As shown in FIG. 4, the cam follower 12 includes a cylindrical shaft portion 12A and a head portion 12B having a diameter larger than that of the shaft portion 12A and connected to an end portion of the shaft portion 12A. As described above, the cam follower 12 is attached to the lens frame 10 through the cam groove 18 of the cam cylinder 8 and the vertical groove 7 of the vertical groove cylinder 7. The shaft portion 12A of the cam follower 12 is located between the first friction member 16A and the second friction member 16B. The shape of the cam follower 12 is not limited to a circular shape, but may be a rectangular shape or the like.

レンズ鏡筒４を撮像装置本体２に取り付けた状態において、第１の導電部材２０の第１の螺旋状導電部２０Ｃと、第２の導電部材２２の第２の螺旋状導電部２２Ｂはそれぞれバッテリー２Ａにスイッチ６を介して接続されている。また、第１の螺旋状導電部２０Ｃ及び第２の螺旋状導電部２２Ｂの先端部は接地されている。そして、スイッチ６を操作することにより、第１の螺旋状導電部２０Ｃ及び第２の螺旋状導電部２２Ｂに電流が流れていない無通電状態と、第１の螺旋状導電部２０Ｃ及び第２の螺旋状導電部２２Ｂに同方向に電流が流れている順電流状態と、第１の螺旋状導電部２０Ｃ及び第２の螺旋状導電部２２Ｂに逆方向に電流が流れている逆電流状態と、のうち少なくとも２つの状態を切り替えることができる。 When the lens barrel 4 is attached to the image pickup apparatus main body 2, the first spiral conductive portion 20C of the first conductive member 20 and the second spiral conductive portion 22B of the second conductive member 22 are batteries, respectively. It is connected to 2A via a switch 6. Further, the tips of the first spiral conductive portion 20C and the second spiral conductive portion 22B are grounded. Then, by operating the switch 6, a non-energized state in which no current is flowing through the first spiral conductive portion 20C and the second spiral conductive portion 22B, and the first spiral conductive portion 20C and the second spiral conductive portion 20C and the second A forward current state in which a current is flowing in the same direction in the spiral conductive portion 22B, and a reverse current state in which a current is flowing in the reverse direction in the first spiral conductive portion 20C and the second spiral conductive portion 22B. At least two of these states can be switched.

以下、本発明の第１実施形態によるレンズ鏡筒４を有する撮像装置１の操作方法を説明する。ここではまず、順電流状態と逆電流状態とを切り替える操作方法を例に説明する。
ズーミング操作を行う場合には、撮影者はスイッチ６を操作して、第１の螺旋状導電部２０Ｃ及び第２の螺旋状導電部２２Ｂに逆方向に電流が流れている逆電流状態に切り替える。図６Ａ及び図６Ｂは、逆電流状態における第１の螺旋状導電部及び第２の螺旋状導電部に流れる電流と磁場を示し、図６Ａは側面概略図であり、図６Ｂは軸方向断面図である。図６Ａ及び図６Ｂに示すように、逆電流状態では、第１の螺旋状導電部２０Ｃと第２の螺旋状導電部２２Ｂには逆方向の電流Ｉ1、Ｉ2がそれぞれ流れる。このように逆方向の電流Ｉ1、Ｉ2が流れると、第１の螺旋状導電部２０Ｃ及び第２の螺旋状導電部２２Ｂの周りに磁場が発生し、第１の螺旋状導電部２０Ｃ及び第２の螺旋状導電部２２Ｂには離間するような磁力（図６Ｂに矢印で示す）が発生する。そして、このような離間するような磁力が発生すると、第１の摩擦部材１６Ａ及び第２の摩擦部材１６Ｂが、第１の螺旋状導電部２０Ｃ及び第２の螺旋状導電部２２Ｂとともに、カムフォロア１２の軸部１２Ａから離間する。これにより、撮影者は少ないトルクでズーミング操作を行うことができる。 Hereinafter, an operation method of the image pickup apparatus 1 having the lens barrel 4 according to the first embodiment of the present invention will be described. Here, first, an operation method for switching between the forward current state and the reverse current state will be described as an example.
When performing the zooming operation, the photographer operates the switch 6 to switch to a reverse current state in which a current is flowing in the first spiral conductive portion 20C and the second spiral conductive portion 22B in the opposite direction. 6A and 6B show the current and magnetic field flowing through the first spiral conductive portion and the second spiral conductive portion in the reverse current state, FIG. 6A is a schematic side view, and FIG. 6B is an axial sectional view. Is. As shown in FIGS. 6A and 6B, in the reverse current state, currents I 1 and I 2 in opposite directions flow through the first spiral conductive portion 20C and the second spiral conductive portion 22B, respectively. When the currents I 1 and I 2 in the opposite directions flow in this way, a magnetic field is generated around the first spiral conductive portion 20C and the second spiral conductive portion 22B, and the first spiral conductive portion 20C and the first spiral conductive portion 20C and the second spiral conductive portion 22B are generated. A magnetic force (indicated by an arrow in FIG. 6B) that separates the second spiral conductive portion 22B is generated. Then, when such a separating magnetic force is generated, the first friction member 16A and the second friction member 16B, together with the first spiral conductive portion 20C and the second spiral conductive portion 22B, cam follower 12 Separated from the shaft portion 12A of. As a result, the photographer can perform the zooming operation with a small amount of torque.

これに対して、ズームを固定したい場合には、撮影者はスイッチ６を操作して、第１の螺旋状導電部２０Ｃ及び第２の螺旋状導電部２２Ｂに同方向に電流が流れている順電流状態に切り替える。図７Ａ及び図７Ｂは、順電流状態における第１の螺旋状導電部及び第２の螺旋状導電部に流れる電流と磁場を示し、図７Ａは側面概略図であり、図７Ｂは軸方向断面図である。図７Ａ及び図７Ｂに示すように、順電流状態では、第１の螺旋状導電部２０Ｃと第２の螺旋状導電部２２Ｂには同方向の電流Ｉ1´、Ｉ2´がそれぞれ流れる。このように同方向の電流Ｉ1´、Ｉ2´が流れると、第１の螺旋状導電部２０Ｃ及び第２の螺旋状導電部２２Ｂの周りに磁場が発生し、第１の螺旋状導電部２０Ｃ及び第２の螺旋状導電部２２Ｂには近接するような磁力（図７Ｂに矢印で示す）が発生する。このような近接するような磁力が発生すると、第１の摩擦部材１６Ａ及び第２の摩擦部材１６Ｂが、第１の螺旋状導電部２０Ｃ及び第２の螺旋状導電部２２Ｂとともに、カムフォロア１２の軸部１２Ａに向かって近接し、第１の摩擦部材１６Ａ及び第２の摩擦部材１６Ｂがカムフォロア１２の軸部１２Ａを両側から挟み込む。この状態でレンズ枠１０（縦溝筒７）に対してカム筒８を回転させようとしても、第１の摩擦部材１６Ａ及び第２の摩擦部材１６Ｂと、カムフォロア１２の軸部１２Ａの間に大きな摩擦力が発生する。このため、カム筒８に対してレンズ枠１０を回転させるためのトルクが大きくなり、例えば、レンズ鏡筒４が傾いたとしても自重によりレンズ枠１０がカム筒８に対して移動することがなくなる。 On the other hand, when the photographer wants to fix the zoom, the photographer operates the switch 6 in the order in which currents flow in the same direction to the first spiral conductive portion 20C and the second spiral conductive portion 22B. Switch to the current state. 7A and 7B show the current and magnetic field flowing through the first spiral conductive portion and the second spiral conductive portion in the forward current state, FIG. 7A is a schematic side view, and FIG. 7B is an axial sectional view. Is. As shown in FIGS. 7A and 7B, in the forward current state, currents I 1 ′ and I 2 ′ in the same direction flow through the first spiral conductive portion 20C and the second spiral conductive portion 22B, respectively. When the currents I 1 ′ and I 2 ′ in the same direction flow in this way, a magnetic field is generated around the first spiral conductive portion 20C and the second spiral conductive portion 22B, and the first spiral conductive portion is generated. A magnetic force (indicated by an arrow in FIG. 7B) is generated in the 20C and the second spiral conductive portion 22B so as to be close to each other. When such a close magnetic force is generated, the first friction member 16A and the second friction member 16B, together with the first spiral conductive portion 20C and the second spiral conductive portion 22B, form the shaft of the cam follower 12. Close to the portion 12A, the first friction member 16A and the second friction member 16B sandwich the shaft portion 12A of the cam follower 12 from both sides. Even if the cam cylinder 8 is rotated with respect to the lens frame 10 (vertical groove cylinder 7) in this state, it is large between the first friction member 16A and the second friction member 16B and the shaft portion 12A of the cam follower 12. Friction force is generated. Therefore, the torque for rotating the lens frame 10 with respect to the cam cylinder 8 becomes large, and for example, even if the lens barrel 4 is tilted, the lens frame 10 does not move with respect to the cam cylinder 8 due to its own weight. ..

なお、ズーム状態を保持する必要がなく、バッテリーの消費を抑える場合には、スイッチ６を操作することにより、第１の螺旋状導電部２０Ｃ及び第２の螺旋状導電部２２Ｂに電流が流れていない無通電状態にするとよい。 When it is not necessary to maintain the zoom state and the battery consumption is suppressed, a current flows through the first spiral conductive portion 20C and the second spiral conductive portion 22B by operating the switch 6. It is advisable to leave it in a non-energized state.

以上説明したように、本実施形態によれば、以下の効果が奏される。
本実施形態によれば、第１の螺旋状導電部２０Ｃ及び第２の螺旋状導電部２２Ｂに電流を印加することにより、第１の螺旋状導電部２０Ｃ及び第２の螺旋状導電部２２Ｂを近接又は離間させて、第１の摩擦部材１６Ａとカムフォロア１２との間の摩擦が大きい状態（順電流状態）と、摩擦がない状態（逆電流状態）とを切り替えることができる。これにより、撮影者のズーミング操作時にはカムフォロア１２と第１の摩擦部材１６Ａとの間の摩擦がない状態とすることにより、操作トルクが小さくなり、スムーズな操作が可能になる。また、ズーム状態を固定する場合にはカムフォロア１２と第１の摩擦部材１６Ａとの間の摩擦が大きい状態とすることにより、操作トルクを大きくして、自重によるレンズの移動を防止できる。 As described above, according to the present embodiment, the following effects are achieved.
According to the present embodiment, by applying an electric current to the first spiral conductive portion 20C and the second spiral conductive portion 22B, the first spiral conductive portion 20C and the second spiral conductive portion 22B are formed. It is possible to switch between a state in which the friction between the first friction member 16A and the cam follower 12 is large (forward current state) and a state in which there is no friction (reverse current state). As a result, the operation torque is reduced and smooth operation is possible by ensuring that there is no friction between the cam follower 12 and the first friction member 16A during the zooming operation of the photographer. Further, when the zoom state is fixed, the operation torque can be increased and the movement of the lens due to its own weight can be prevented by setting the friction between the cam follower 12 and the first friction member 16A to be large.

また、本実施形態によれば、カム溝１８の他方の縁に沿って設けられた第２の摩擦部材１６Ｂを備え、第２の螺旋状導電部２２Ｂが第２の摩擦部材１６Ｂに取り付けられている。これにより、順電流状態において第１の摩擦部材１６Ａと第２の摩擦部材１６Ｂとによりカムフォロア１２を挟み込み、より強固にズーム状態を固定することができる。 Further, according to the present embodiment, a second friction member 16B provided along the other edge of the cam groove 18 is provided, and the second spiral conductive portion 22B is attached to the second friction member 16B. There is. As a result, the cam follower 12 can be sandwiched between the first friction member 16A and the second friction member 16B in the forward current state, and the zoom state can be fixed more firmly.

また、本実施形態によれば、第１の螺旋状導電部２０Ｃ及び第２の螺旋状導電部２２Ｂが、それぞれ、第１の摩擦部材１６Ａ及び前記第２の摩擦部材１６Ｂの半径方向内側面に取り付けられている。これにより、例えば、第１の摩擦部材１６Ａ及び前記第２の摩擦部材１６Ｂの周方向側面を切り欠き部２４Ａ、２４Ｂの側壁に取り付けることが可能になる。 Further, according to the present embodiment, the first spiral conductive portion 20C and the second spiral conductive portion 22B are located on the inner side surfaces in the radial direction of the first friction member 16A and the second friction member 16B, respectively. It is attached. As a result, for example, the circumferential side surfaces of the first friction member 16A and the second friction member 16B can be attached to the side walls of the cutout portions 24A and 24B.

また、本実施形態によれば、カム筒８には、カム溝１８の一方の縁に沿うように形成された切り欠き部２４Ａ、２４Ｂが形成されており、第１の摩擦部材１６Ａ及び第２の摩擦部材１６Ｂは切り欠き部２４Ａ、２４Ｂに配置されている。これにより、第１の摩擦部材１６Ａ及び第２の摩擦部材１６Ｂがカム筒８の外部に突出することがない。 Further, according to the present embodiment, the cam cylinder 8 is formed with notches 24A and 24B formed along one edge of the cam groove 18, and the first friction member 16A and the second friction member 16A and the second are formed. The friction member 16B of the above is arranged in the notches 24A and 24B. As a result, the first friction member 16A and the second friction member 16B do not protrude to the outside of the cam cylinder 8.

なお、本実施形態では、カム溝１８の両縁にそれぞれ第１の摩擦部材１６Ａ及び第２の摩擦部材１６Ｂを設けているが、第２の摩擦部材１６Ｂを省略し、第１の摩擦部材１６Ａのみをカムフォロア１２の軸部１２Ａに当接した状態と、軸部１２Ａから離間した状態とを切り替えられる構成としてもよい。このような場合には、第１の螺旋状導電部２０Ｃ及び第２の螺旋状導電部２２Ｂの通電状態を切り替えることにより、第１の摩擦部材１６Ａとカムフォロア１２との摩擦力を変更することができる。 In the present embodiment, the first friction member 16A and the second friction member 16B are provided on both edges of the cam groove 18, respectively, but the second friction member 16B is omitted and the first friction member 16A is omitted. The configuration may be such that it is possible to switch between a state in which only the cam follower 12 is in contact with the shaft portion 12A and a state in which the cam follower 12 is separated from the shaft portion 12A. In such a case, the frictional force between the first friction member 16A and the cam follower 12 can be changed by switching the energized state of the first spiral conductive portion 20C and the second spiral conductive portion 22B. it can.

また、本実施形態では、順電流状態において第１の摩擦部材１６Ａ及び第２の摩擦部材１６Ｂが、カムフォロア１２の軸部１２Ａに当接し、逆電流状態において第１の摩擦部材１６Ａ及び第２の摩擦部材１６Ｂが、カムフォロア１２の軸部１２Ａから離間する構成としたが本発明はこれに限られない。例えば、順電流状態において第１の摩擦部材１６Ａ及び第２の摩擦部材１６Ｂが、カムフォロア１２の軸部１２Ａに当接し、無通電状態において第１の摩擦部材１６Ａ及び第２の摩擦部材１６Ｂがカムフォロア１２の軸部１２Ａから離間する構成としてもよい（順電流状態と無通電状態との切り替え）。また、例えば、無通電状態において第１の摩擦部材１６Ａ及び第２の摩擦部材１６Ｂが、カムフォロア１２の軸部１２Ａに当接し、逆電流状態において第１の摩擦部材１６Ａ及び第２の摩擦部材１６Ｂがカムフォロア１２の軸部１２Ａから離間する構成としてもよい（無通電状態と逆電流状態との切り替え）。 Further, in the present embodiment, the first friction member 16A and the second friction member 16B abut on the shaft portion 12A of the cam follower 12 in the forward current state, and the first friction member 16A and the second friction member 16A and the second friction member 16B in the reverse current state. The friction member 16B is configured to be separated from the shaft portion 12A of the cam follower 12, but the present invention is not limited to this. For example, the first friction member 16A and the second friction member 16B abut on the shaft portion 12A of the cam follower 12 in the forward current state, and the first friction member 16A and the second friction member 16B come into contact with the cam follower 12 in the non-energized state. It may be configured to be separated from the shaft portion 12A of the twelve (switching between the forward current state and the non-energized state). Further, for example, the first friction member 16A and the second friction member 16B abut on the shaft portion 12A of the cam follower 12 in the non-energized state, and the first friction member 16A and the second friction member 16B in the reverse current state. May be configured to be separated from the shaft portion 12A of the cam follower 12 (switching between the non-energized state and the reverse current state).

また、必ずしも、ズーム操作時に、第１の摩擦部材１６Ａ及び第２の摩擦部材１６Ｂが、カムフォロア１２の軸部１２Ａから完全に離間する必要はなく、第１の摩擦部材１６Ａ及び第２の摩擦部材１６Ｂと軸部１２Ａとの摩擦力が小さい状態となればよい（本明細書では、近接（当接）した状態よりも摩擦力が小さい状態（完全には離間していない状態）も含めて「離間」と呼称する）。
換言すれば、本発明は、第１の螺旋状導電部２０Ｃ及び第２の螺旋状導電部２２Ｂに対する電流の印加状態を切り替えることにより、カムフォロア１２に対する第１の摩擦部材１６Ａ（及び第２の摩擦部材１６Ｂ）の付勢状態（近接状態と離間状態）を切り替える。これによって、上述の通り、操作トルクを大きくすることなく、自重によるレンズの移動を防止することができる。 Further, the first friction member 16A and the second friction member 16B do not necessarily have to be completely separated from the shaft portion 12A of the cam follower 12 during the zoom operation, and the first friction member 16A and the second friction member 16A and the second friction member do not necessarily have to be completely separated from each other. It suffices if the frictional force between 16B and the shaft portion 12A is small (in the present specification, the frictional force is smaller than that in the state of being close (contacted) (the state of not being completely separated). It is called "separation").
In other words, in the present invention, the first friction member 16A (and the second friction) with respect to the cam follower 12 by switching the application state of the electric current to the first spiral conductive portion 20C and the second spiral conductive portion 22B. The urging state (proximity state and separation state) of the member 16B) is switched. As a result, as described above, it is possible to prevent the lens from moving due to its own weight without increasing the operating torque.

＜第２実施形態＞
以下、本発明のレンズ鏡筒の第２実施形態を図面を参照しながら詳細に説明する。第２実施形態のレンズ鏡筒は、第１の螺旋状部及び第２の螺旋状部の形状及び配置が第１実施形態と異なっている。以下の説明において、第１実施形態と同様の構成については、同じ符号を付して詳細な説明を省略する。 <Second Embodiment>
Hereinafter, a second embodiment of the lens barrel of the present invention will be described in detail with reference to the drawings. The lens barrel of the second embodiment is different from the first embodiment in the shape and arrangement of the first spiral portion and the second spiral portion. In the following description, the same components as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

図８は、本発明の第２実施形態によるレンズ鏡筒におけるレンズの駆動機構の図４に対応する断面図である。図９は、本発明の第２実施形態によるレンズ鏡筒のレンズの駆動機構の導電部材アセンブリを示す斜視図である。 FIG. 8 is a cross-sectional view corresponding to FIG. 4 of a lens driving mechanism in the lens barrel according to the second embodiment of the present invention. FIG. 9 is a perspective view showing a conductive member assembly of a lens driving mechanism of a lens barrel according to a second embodiment of the present invention.

図８及び図９に示すように、第２実施形態によるレンズ鏡筒の導電部材アセンブリ１１４は、第１の導電部材１２０と、３つの第２の導電部材１２２とを備える。第１の導電部材１２０は、円環状の円環部１２０Ａと、円環部１２０Ａから半径方向外方に延びる突部１２０Ｂと、突部１２０Ｂの周方向の一側から対物側に螺旋状に延びる第１の螺旋状導電部１２０Ｃとを備える。円環部１２０Ａは、内径がカム筒８の内径と略等しく、また、幅がカム筒８の厚さよりも小さくなるように形成されている。突部１２０Ｂは円環部１２０Ａの外周から等角度間隔で突出している。第１の螺旋状導電部１２０Ｃは、例えば、銅などの導電材料からなり、カム溝１８と同形状で同じ長さ延びている。 As shown in FIGS. 8 and 9, the conductive member assembly 114 of the lens barrel according to the second embodiment includes a first conductive member 120 and three second conductive members 122. The first conductive member 120 spirally extends from one side in the circumferential direction of the annular portion 120A, the protrusion 120B extending radially outward from the ring portion 120A, and the protrusion 120B toward the objective side. It includes a first spiral conductive portion 120C. The annular portion 120A is formed so that the inner diameter is substantially equal to the inner diameter of the cam cylinder 8 and the width is smaller than the thickness of the cam cylinder 8. The protrusions 120B project from the outer circumference of the annular portion 120A at equal angular intervals. The first spiral conductive portion 120C is made of a conductive material such as copper, and has the same shape as the cam groove 18 and extends the same length.

第２の導電部材１２２は、それぞれ、円弧状に延びる円弧状部１２２Ａと、円弧状部１２２Ａの周方向一端から対物側に螺旋状に延びる第２の螺旋状導電部１２２Ｂとを備える。円弧状部１２２Ａは、内径がカム筒８の中心から切り欠き部２４Ａ、２４Ｂの底面までの距離と略等しくなっている。第２の螺旋状導電部１２２Ｂは、例えば、銅などの導電材料からなり、カム溝１８と同形状で同じ長さ延びている。第２の導電部材１２２は、円弧状部１２２Ａが第１の導電部材１２０の隣接する突部１２０Ｂの間を延びるように配置されている。これにより、第１の導電部材１２０の第１の螺旋状導電部１２０Ｃと、第２の導電部材１２２の第２の螺旋状導電部１２２Ｂとは略平行に螺旋状に延びる。なお、第１の導電部材１２０と第２の導電部材１２２とは、例えば、第１の導電部材１２０の円環部１２０Ａと、第２の導電部材１２２の円弧状部１２２Ａとの間に絶縁部材を介在させることにより、絶縁状態が維持されている。 The second conductive member 122 includes an arc-shaped portion 122A extending in an arc shape and a second spiral conductive portion 122B spirally extending from one end of the arc-shaped portion 122A in the circumferential direction toward the objective side, respectively. The inner diameter of the arcuate portion 122A is substantially equal to the distance from the center of the cam cylinder 8 to the bottom surfaces of the cutout portions 24A and 24B. The second spiral conductive portion 122B is made of a conductive material such as copper, has the same shape as the cam groove 18, and extends the same length. The second conductive member 122 is arranged so that the arcuate portion 122A extends between the adjacent protrusions 120B of the first conductive member 120. As a result, the first spiral conductive portion 120C of the first conductive member 120 and the second spiral conductive portion 122B of the second conductive member 122 extend spirally substantially in parallel. The first conductive member 120 and the second conductive member 122 are, for example, an insulating member between the annular portion 120A of the first conductive member 120 and the arcuate portion 122A of the second conductive member 122. The insulation state is maintained by interposing.

図８に示すように、本実施形態においても摩擦部材アセンブリ１１６は第１の摩擦部材１１６Ａ及び第２の摩擦部材１１６Ｂを含む。第１の摩擦部材１１６Ａは第１の導電部材１２０の第１の螺旋状導電部１２０Ｃの半径方向外面に取り付けられており、第２の摩擦部材１１６Ｂは第２の導電部材１２２の第２の螺旋状導電部１２２Ｂの半径方向外面に取り付けられている。 As shown in FIG. 8, the friction member assembly 116 also includes the first friction member 116A and the second friction member 116B in this embodiment as well. The first friction member 116A is attached to the radial outer surface of the first spiral conductive portion 120C of the first conductive member 120, and the second friction member 116B is the second spiral of the second conductive member 122. It is attached to the radial outer surface of the conductive portion 122B.

導電部材アセンブリ１１４は、第１の導電部材１２０の第１の螺旋状導電部１２０Ｃが第１の切り欠き部２４Ａの周方向の側面に当接するとともに、第２の導電部材１２２の第２の螺旋状導電部１２２Ｂが第２の切り欠き部２４Ｂの半径方向の底面に当接するように配置されている。そして、第１の導電部材１２０の第１の螺旋状導電部１２０Ｃ及び第１の摩擦部材１１６Ａは、第１の切り欠き部２４Ａ内に収容されており、第２の導電部材１２２の第２の螺旋状導電部１２２Ｂ及び第２の摩擦部材１１６Ｂは第２の切り欠き部２４Ｂ内に収容されている。なお、第１の摩擦部材１１６Ａ及び第２の摩擦部材１１６Ｂは、第１の切り欠き部２４Ａ及び第２の切り欠き部２４Ｂから離脱しないように保持されている。 In the conductive member assembly 114, the first spiral conductive portion 120C of the first conductive member 120 abuts on the circumferential side surface of the first notch portion 24A, and the second spiral of the second conductive member 122. The conductive portion 122B is arranged so as to abut the bottom surface of the second notch portion 24B in the radial direction. The first spiral conductive portion 120C and the first friction member 116A of the first conductive member 120 are housed in the first notch portion 24A, and the second conductive member 122 has a second. The spiral conductive portion 122B and the second friction member 116B are housed in the second notch portion 24B. The first friction member 116A and the second friction member 116B are held so as not to be separated from the first notch portion 24A and the second notch portion 24B.

図８に示すように、カムフォロア１２は、円筒状の軸部１２Ａと、軸部１２Ａよりも径が大きく軸部１２Ａの端部に接続された頭部１２Ｂとを備える。カムフォロア１２は、カム筒８のカム溝１８及び縦溝筒７の縦溝７を挿通して、レンズ枠１０に取り付けられている。カムフォロア１２の軸部１２Ａは、第１の摩擦部材１１６Ａと第２の摩擦部材１１６Ｂとの間に位置するように配置されている。なお、カムフォロア１２の形状は円形に限らず、矩形状などにしてもよい。 As shown in FIG. 8, the cam follower 12 includes a cylindrical shaft portion 12A and a head portion 12B having a diameter larger than that of the shaft portion 12A and connected to an end portion of the shaft portion 12A. The cam follower 12 is attached to the lens frame 10 by inserting the cam groove 18 of the cam cylinder 8 and the vertical groove 7 of the vertical groove cylinder 7. The shaft portion 12A of the cam follower 12 is arranged so as to be located between the first friction member 116A and the second friction member 116B. The shape of the cam follower 12 is not limited to a circular shape, but may be a rectangular shape or the like.

以下、本発明の第２実施形態によるレンズ鏡筒４を有する撮像装置１の操作方法を説明する。ここではまず、順電流状態と逆電流状態とを切り替える操作方法を例に説明する。
ズーミング操作を行う場合には、撮影者はスイッチ６を操作して、第１の導電部材１２０の第１の螺旋状導電部１２０Ｃ及び第２の導電部材１２２の第２の螺旋状導電部１２２Ｂに逆方向に電流が流れている逆電流状態に切り替える。第１実施形態と同様に、第１の螺旋状導電部１２０Ｃ及び第２の螺旋状導電部１２２Ｂに逆方向の電流Ｉ1、Ｉ2が流れると、第１の螺旋状導電部１２０Ｃ及び第２の螺旋状導電部１２２Ｂの周りに磁場が発生し、第１の螺旋状導電部１２０Ｃ及び第２の螺旋状導電部１２２Ｂには離間するような磁力が発生する。そして、このような離間するような磁力が発生すると、第１の摩擦部材１１６Ａ及び第２の摩擦部材１１６Ｂが、第１の螺旋状導電部１２０Ｃ及び第２の螺旋状導電部１２２Ｂとともに、カムフォロア１２の軸部１２Ａから離間する。これにより、撮影者は少ないトルクでズーミング操作を行うことができる。 Hereinafter, an operation method of the image pickup apparatus 1 having the lens barrel 4 according to the second embodiment of the present invention will be described. Here, first, an operation method for switching between the forward current state and the reverse current state will be described as an example.
When performing the zooming operation, the photographer operates the switch 6 to form the first spiral conductive portion 120C of the first conductive member 120 and the second spiral conductive portion 122B of the second conductive member 122. Switch to the reverse current state where the current is flowing in the opposite direction. Similar to the first embodiment, when currents I 1 and I 2 in opposite directions flow through the first spiral conductive portion 120C and the second spiral conductive portion 122B, the first spiral conductive portion 120C and the second spiral conductive portion 120C and the second A magnetic field is generated around the spiral conductive portion 122B of the above, and a magnetic force is generated so as to separate the first spiral conductive portion 120C and the second spiral conductive portion 122B. Then, when such a separating magnetic force is generated, the first friction member 116A and the second friction member 116B, together with the first spiral conductive portion 120C and the second spiral conductive portion 122B, cam follower 12 Separated from the shaft portion 12A of. As a result, the photographer can perform the zooming operation with a small amount of torque.

これに対して、ズームを固定したい場合には、撮影者はスイッチ６を操作して、第１の螺旋状導電部１２０Ｃ及び第２の螺旋状導電部１２２Ｂに同方向に電流が流れている順電流状態に切り替える。第１実施形態と同様に、第１の螺旋状導電部１２０Ｃと、第２の螺旋状導電部１２２Ｂに同方向の電流Ｉ1´、Ｉ2´が流れると、第１の螺旋状導電部１２０Ｃ及び第２の螺旋状導電部１２２Ｂの周りに磁場が発生し、第１の螺旋状導電部１２０Ｃ及び第２の螺旋状導電部１２２Ｂには近接するような磁力が発生する。このような近接するような磁力が発生すると、第１の摩擦部材１１６Ａ及び第２の摩擦部材１１６Ｂが、第１の螺旋状導電部１２０Ｃ及び第２の螺旋状導電部１２２Ｂとともに、カムフォロア１２の軸部１２Ａに向かって近接し、第１の摩擦部材１１６Ａ及び第２の摩擦部材１１６Ｂがカムフォロア１２の軸部１２Ａを両側から挟み込む。この状態でカム筒８に対してレンズ枠１０を回転させようとしても、第１の摩擦部材１１６Ａ及び第２の摩擦部材１１６Ｂと、カムフォロア１２の軸部１２Ａの間に大きな摩擦力が発生する。このため、レンズ枠１０（縦溝筒７）に対してカム筒８を回転させるためのトルクが大きくなり、例えば、レンズ鏡筒４が傾いたとしても自重によりレンズ枠１０がカム筒８に対して移動することがなくなる。 On the other hand, when it is desired to fix the zoom, the photographer operates the switch 6 in the order in which currents flow in the same direction to the first spiral conductive portion 120C and the second spiral conductive portion 122B. Switch to the current state. Similar to the first embodiment, when the currents I 1 ′ and I 2 ′ in the same direction flow through the first spiral conductive portion 120C and the second spiral conductive portion 122B, the first spiral conductive portion 120C A magnetic field is generated around the second spiral conductive portion 122B, and a magnetic force is generated so as to be close to the first spiral conductive portion 120C and the second spiral conductive portion 122B. When such a close magnetic force is generated, the first friction member 116A and the second friction member 116B, together with the first spiral conductive portion 120C and the second spiral conductive portion 122B, form the shaft of the cam follower 12. Close to the portion 12A, the first friction member 116A and the second friction member 116B sandwich the shaft portion 12A of the cam follower 12 from both sides. Even if the lens frame 10 is rotated with respect to the cam cylinder 8 in this state, a large frictional force is generated between the first friction member 116A and the second friction member 116B and the shaft portion 12A of the cam follower 12. Therefore, the torque for rotating the cam cylinder 8 with respect to the lens frame 10 (vertical groove cylinder 7) becomes large. For example, even if the lens barrel 4 is tilted, the lens frame 10 with respect to the cam cylinder 8 due to its own weight. Will not move.

なお、ズーム状態を保持する必要がなく、バッテリーの消費を抑える場合には、スイッチ６を操作することにより、第１の螺旋状導電部１２０Ｃ及び第２の螺旋状導電部１２２Ｂに電流が流れていない無通電状態にするとよい。 When it is not necessary to maintain the zoom state and the battery consumption is suppressed, a current flows through the first spiral conductive portion 120C and the second spiral conductive portion 122B by operating the switch 6. It is advisable to leave it in a non-energized state.

以上説明したように、本実施形態によれば、以下の効果が奏される。
本実施形態によれば、第１の螺旋状導電部１２０Ｃ及び第２の螺旋状導電部１２２Ｂに電流を印加することにより、第１の螺旋状導電部１２０Ｃ及び第２の螺旋状導電部１２２Ｂを近接又は離間させて、第１の摩擦部材１１６Ａとカムフォロア１２との間の摩擦力が大きい状態（順電流状態）と、摩擦力がない状態（逆電流状態）とを切り替えることができる。これにより、撮影者のズーミング操作時にはカムフォロア１２と第１の摩擦部材１１６Ａとの間の摩擦力がない状態とすることにより、操作トルクが小さくなり、スムーズな操作が可能になる。また、ズーム状態を固定する場合にはカムフォロア１２と第１の摩擦部材１１６Ａとの間の摩擦力が大きい状態とすることにより、操作トルクを大きくして、自重によるレンズの移動を防止できる。 As described above, according to the present embodiment, the following effects are achieved.
According to the present embodiment, the first spiral conductive portion 120C and the second spiral conductive portion 122B are formed by applying an electric current to the first spiral conductive portion 120C and the second spiral conductive portion 122B. It is possible to switch between a state in which the frictional force between the first friction member 116A and the cam follower 12 is large (forward current state) and a state in which there is no frictional force (reverse current state). As a result, the operation torque is reduced and smooth operation is possible by making the cam follower 12 and the first friction member 116A in a state where there is no frictional force during the zooming operation of the photographer. Further, when the zoom state is fixed, the operating torque can be increased and the movement of the lens due to its own weight can be prevented by setting the frictional force between the cam follower 12 and the first friction member 116A to be large.

また、本実施形態によれば、カム溝１８の他方の縁に沿って設けられた第２の摩擦部材１１６Ｂを備え、第２の螺旋状導電部１２２Ｂが第２の摩擦部材１１６Ｂに取り付けられている。これにより、順電流状態において第１の摩擦部材１１６Ａと第２の摩擦部材１１６Ｂとによりカムフォロア１２を挟み込み、より強固にズーム状態を固定することができる。 Further, according to the present embodiment, a second friction member 116B provided along the other edge of the cam groove 18 is provided, and the second spiral conductive portion 122B is attached to the second friction member 116B. There is. As a result, the cam follower 12 can be sandwiched between the first friction member 116A and the second friction member 116B in the forward current state, and the zoom state can be fixed more firmly.

また、本実施形態によれば、第１の螺旋状導電部１２０Ｃ及び第２の螺旋状導電部１２２Ｂが、それぞれ、第１の摩擦部材１１６Ａ及び第２の摩擦部材１１６Ｂの半径方向内側面に取り付けられている。これにより、第１の摩擦部材１１６Ａ及び第２の摩擦部材１１６Ｂとして弾性変形しにくい部材を採用した場合であっても、第１の螺旋状導電部１２０Ｃ及び第２の螺旋状導電部１２２Ｂが、側方から第１の摩擦部材１１６Ａ及び第２の摩擦部材１１６Ｂを押圧するため、確実に第１の摩擦部材１１６Ａ及び第２の摩擦部材１１６Ｂをカムフォロア１２に当接させることができる。 Further, according to the present embodiment, the first spiral conductive portion 120C and the second spiral conductive portion 122B are attached to the inner side surfaces in the radial direction of the first friction member 116A and the second friction member 116B, respectively. Has been done. As a result, even when a member that is not easily elastically deformed is adopted as the first friction member 116A and the second friction member 116B, the first spiral conductive portion 120C and the second spiral conductive portion 122B can be formed. Since the first friction member 116A and the second friction member 116B are pressed from the side, the first friction member 116A and the second friction member 116B can be surely brought into contact with the cam follower 12.

また、本実施形態によれば、カム筒８には、カム溝１８の一方の縁に沿うように形成された切り欠き部２４Ａ、２４Ｂが形成されており、第１の摩擦部材１１６Ａ及び第２の摩擦部材１１６Ｂは切り欠き部２４Ａ、２４Ｂに配置されている。これにより、第１の摩擦部材１１６Ａ及び第２の摩擦部材１１６Ｂがカム筒８の外部に突出することがない。 Further, according to the present embodiment, the cam cylinder 8 is formed with notches 24A and 24B formed along one edge of the cam groove 18, and the first friction member 116A and the second friction member 116A and the second are formed. The friction member 116B of the above is arranged in the notches 24A and 24B. As a result, the first friction member 116A and the second friction member 116B do not protrude to the outside of the cam cylinder 8.

なお、本実施形態では、カム溝１８の両縁にそれぞれ第１の摩擦部材１１６Ａ及び第２の摩擦部材１１６Ｂを設けているが、第２の摩擦部材１１６Ｂを省略し、第１の摩擦部材１１６Ａのみをカムフォロア１２の軸部１２Ａに当接した状態と、軸部１２Ａから離間した状態とを切り替えられる構成としてもよい。このような場合には、第１の螺旋状導電部１２０Ｃ及び第２の螺旋状導電部１２２Ｂの通電状態を切り替えることにより、第１の摩擦部材１６Ａとカムフォロア１２との摩擦力を変更することができる。 In the present embodiment, the first friction member 116A and the second friction member 116B are provided on both edges of the cam groove 18, respectively, but the second friction member 116B is omitted and the first friction member 116A is omitted. The configuration may be such that it is possible to switch between a state in which only the cam follower 12 is in contact with the shaft portion 12A and a state in which the cam follower 12 is separated from the shaft portion 12A. In such a case, the frictional force between the first friction member 16A and the cam follower 12 can be changed by switching the energized state of the first spiral conductive portion 120C and the second spiral conductive portion 122B. it can.

また、本実施形態では、順電流状態において第１の摩擦部材１１６Ａ及び第２の摩擦部材１１６Ｂが、カムフォロア１２の軸部１２Ａに当接し、逆電流状態において第１の摩擦部材１１６Ａ及び第２の摩擦部材１１６Ｂが、カムフォロア１２の軸部１２Ａから離間する構成としたが本発明はこれに限られない。例えば、順電流状態において第１の摩擦部材１１６Ａ及び第２の摩擦部材１１６Ｂが、カムフォロア１２の軸部１２Ａに当接し、無通電状態において第１の摩擦部材１１６Ａ及び第２の摩擦部材１１６Ｂがカムフォロア１２の軸部１２Ａから離間する構成としてもよい（順電流状態と無通電状態との切り替え）。また、例えば、無通電状態において第１の摩擦部材１１６Ａ及び第２の摩擦部材１１６Ｂが、カムフォロア１２の軸部１２Ａに当接し、逆電流状態において第１の摩擦部材１１６Ａ及び第２の摩擦部材１１６Ｂがカムフォロア１２の軸部１２Ａから離間する構成としてもよい（無通電状態と逆電流状態との切り替え）。 Further, in the present embodiment, the first friction member 116A and the second friction member 116B abut on the shaft portion 12A of the cam follower 12 in the forward current state, and the first friction member 116A and the second friction member 116A and the second friction member 116B in the reverse current state. The friction member 116B is configured to be separated from the shaft portion 12A of the cam follower 12, but the present invention is not limited to this. For example, the first friction member 116A and the second friction member 116B abut on the shaft portion 12A of the cam follower 12 in the forward current state, and the first friction member 116A and the second friction member 116B come into contact with the cam follower 12 in the non-energized state. It may be configured to be separated from the shaft portion 12A of the twelve (switching between the forward current state and the non-energized state). Further, for example, the first friction member 116A and the second friction member 116B abut on the shaft portion 12A of the cam follower 12 in the non-energized state, and the first friction member 116A and the second friction member 116B in the reverse current state. May be configured to be separated from the shaft portion 12A of the cam follower 12 (switching between the non-energized state and the reverse current state).

また、必ずしも、ズーム操作時に、第１の摩擦部材１１６Ａ及び第２の摩擦部材１１６Ｂが、カムフォロア１２の軸部１２Ａから完全に離間する必要はなく、第１の摩擦部材１１６Ａ及び第２の摩擦部材１１６Ｂと軸部１２Ａとの摩擦力が小さい状態となればよい。（本明細書では、近接（当接）した状態よりも摩擦力が小さい状態（完全には離間していない状態）も含めて「離間」と呼称する）。
換言すれば、本発明は、第１の螺旋状導電部１２０Ｃ及び第２の螺旋状導電部１２２Ｂに対する電流の印加状態を切り替えることにより、カムフォロア１２に対する第１の摩擦部材１６Ａ（及び第２の摩擦部材１６Ｂ）の付勢状態（近接状態と離間状態）を切り替える。これによって、上述の通り、操作トルクを大きくすることなく、自重によるレンズの移動を防止することができる。 Further, the first friction member 116A and the second friction member 116B do not necessarily have to be completely separated from the shaft portion 12A of the cam follower 12 during the zoom operation, and the first friction member 116A and the second friction member 116A and the second friction member do not necessarily have to be completely separated from each other. The frictional force between the 116B and the shaft portion 12A may be small. (In the present specification, it is referred to as "separation" including a state in which the frictional force is smaller than that in a state of being close (contact) (a state of not being completely separated)).
In other words, in the present invention, the first friction member 16A (and the second friction) with respect to the cam follower 12 by switching the application state of the electric current to the first spiral conductive portion 120C and the second spiral conductive portion 122B. The urging state (proximity state and separation state) of the member 16B) is switched. As a result, as described above, it is possible to prevent the lens from moving due to its own weight without increasing the operating torque.

＜第３実施形態＞
以下、本発明のレンズ鏡筒の第３実施形態を図面を参照しながら詳細に説明する。第３実施形態のレンズ鏡筒は、導電部材アセンブリの形状及び配置が第１実施形態と異なっている。以下の説明において、第１実施形態と同様の構成については、同じ符号を付して詳細な説明を省略する。 <Third Embodiment>
Hereinafter, a third embodiment of the lens barrel of the present invention will be described in detail with reference to the drawings. The lens barrel of the third embodiment is different from the first embodiment in the shape and arrangement of the conductive member assembly. In the following description, the same components as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

図１０は、本発明の第３実施形態によるレンズ鏡筒におけるレンズの駆動機構の図４に対応する断面図である。図１１Ａは、本発明の第３実施形態によるレンズ鏡筒のレンズの駆動機構の導電部材アセンブリを示す斜視図であり、図１１Ｂは、図１１ＡのＢ部の拡大図である。 FIG. 10 is a cross-sectional view corresponding to FIG. 4 of a lens driving mechanism in the lens barrel according to the third embodiment of the present invention. 11A is a perspective view showing a conductive member assembly of a lens driving mechanism of a lens barrel according to a third embodiment of the present invention, and FIG. 11B is an enlarged view of a portion B of FIG. 11A.

図１０Ａ、図１０Ｂ及び図１１に示すように、第３実施形態によるレンズ鏡筒の導電部材アセンブリ２１４は、第１の導電部材２２０と、３つの第２の導電部材２２２とを備える。第１の導電部材２２０は、円環状の円環部２２０Ａと、円環部２２０Ａから半径方向外方に延びる突部２２０Ｂと、突部２２０Ｂの周方向の一側から対物側に螺旋状に延びる第１の螺旋状導電部２２０Ｃ及び第２の螺旋状導電部２２０Ｄと、を備える。円環部２２０Ａは、内径がカム筒８の内径と略等しく、また、幅がカム筒８の厚さよりも小さくなるように形成されている。突部２２０Ｂは円環部２２０Ａの外周から等角度間隔で突出している。第１の螺旋状導電部２２０Ｃ及び第２の螺旋状導電部２２０Ｄは、例えば、銅などの導電材料からなり、カム溝１８と同形状で同じ長さ延びている。 As shown in FIGS. 10A, 10B and 11, the conductive member assembly 214 of the lens barrel according to the third embodiment includes a first conductive member 220 and three second conductive members 222. The first conductive member 220 spirally extends from one side in the circumferential direction of the annular portion 220A, the protrusion 220B extending radially outward from the ring portion 220A, and the protrusion 220B toward the objective side. A first spiral conductive portion 220C and a second spiral conductive portion 220D are provided. The annular portion 220A is formed so that the inner diameter is substantially equal to the inner diameter of the cam cylinder 8 and the width is smaller than the thickness of the cam cylinder 8. The protrusions 220B project from the outer circumference of the annular portion 220A at equal angular intervals. The first spiral conductive portion 220C and the second spiral conductive portion 220D are made of a conductive material such as copper, and have the same shape as the cam groove 18 and extend the same length.

第２の導電部材２２２は、それぞれ、円弧状に延びる円弧状部２２２Ａと、円弧状部２２２Ａの周方向一端から対物側に螺旋状に延びる第３の螺旋状導電部２２２Ｂ及び第４の螺旋状導電部２２２Ｃとを備える。円弧状部２２２Ａは、内径がカム筒８の中心から切り欠き部２４Ａ、２４Ｂの底面までの距離と略等しくなっている。第３の螺旋状導電部２２２Ｂ及び第４の螺旋状導電部２２２Ｃは、カム溝１８と同形状で同じ長さ延びている。第２の導電部材２２２は、円弧状部２２２Ａが第１の導電部材２２０の隣接する突部２２０Ｂの間を延びるように配置されている。これにより、第２の導電部材２２２の第１の螺旋状導電部２２０Ｃ及び第２の螺旋状導電部２２０Ｄと、第２の導電部材２２２の第３の螺旋状導電部２２２Ｂ及び第４の螺旋状導電部２２２Ｃとは略平行に螺旋状に延びる。 The second conductive member 222 has an arc-shaped portion 222A extending in an arc shape, a third spiral conductive portion 222B extending spirally from one end in the circumferential direction of the arc-shaped portion 222A toward the objective side, and a fourth spiral shape, respectively. It includes a conductive portion 222C. The inner diameter of the arcuate portion 222A is substantially equal to the distance from the center of the cam cylinder 8 to the bottom surfaces of the cutout portions 24A and 24B. The third spiral conductive portion 222B and the fourth spiral conductive portion 222C have the same shape as the cam groove 18 and extend the same length. The second conductive member 222 is arranged so that the arcuate portion 222A extends between the adjacent protrusions 220B of the first conductive member 220. As a result, the first spiral conductive portion 220C and the second spiral conductive portion 220D of the second conductive member 222, and the third spiral conductive portion 222B and the fourth spiral of the second conductive member 222. It extends spirally substantially parallel to the conductive portion 222C.

図１０に示すように、本実施形態においても摩擦部材アセンブリ２１６は第１の摩擦部材２１６Ａ及び第２の摩擦部材２１６Ｂを含む。第１の導電部材２２０の第１の螺旋状導電部２２０Ｃ及び第２の螺旋状導電部２２０Ｄは、第１の摩擦部材２１６Ａの半径方向内側面の両縁にそれぞれ取り付けられている。また、第２の導電部材２２２の第３の螺旋状導電部２２２Ｂ及び第４の螺旋状導電部２２２Ｃは、第２の摩擦部材２１６Ｂの半径方向内側面の両縁にそれぞれ取り付けられている。 As shown in FIG. 10, the friction member assembly 216 also includes the first friction member 216A and the second friction member 216B in this embodiment as well. The first spiral conductive portion 220C and the second spiral conductive portion 220D of the first conductive member 220 are attached to both edges of the inner side surface in the radial direction of the first friction member 216A, respectively. Further, the third spiral conductive portion 222B and the fourth spiral conductive portion 222C of the second conductive member 222 are attached to both edges of the inner side surface in the radial direction of the second friction member 216B, respectively.

第１の導電部材２２０の第１の螺旋状導電部２２０Ｃ及び第２の螺旋状導電部２２０Ｄと、第１の摩擦部材２１６Ａは、第１の切り欠き部２４Ａ内に配置されている。第１の導電部材２２０の第１の螺旋状導電部２２０Ｃ及び第２の螺旋状導電部２２０Ｄは、第１の切り欠き部２４Ａの半径方向の底面に当接している。また、第１の摩擦部材２１６Ａの周方向の側面が第１の切り欠き部２４Ａの周方向の側壁に例えば接着剤などにより取り付けられている。 The first spiral conductive portion 220C and the second spiral conductive portion 220D of the first conductive member 220 and the first friction member 216A are arranged in the first notch portion 24A. The first spiral conductive portion 220C and the second spiral conductive portion 220D of the first conductive member 220 are in contact with the radial bottom surface of the first notch portion 24A. Further, the side surface of the first friction member 216A in the circumferential direction is attached to the side wall of the first notch portion 24A in the circumferential direction by, for example, an adhesive.

また、第２の導電部材２２２の第３の螺旋状導電部２２２Ｂ及び第４の螺旋状導電部２２２Ｃと、第２の摩擦部材２１６Ｂは、第２の切り欠き部２４Ｂ内に配置されている。第２の導電部材２２２の第３の螺旋状導電部２２２Ｂ及び第４の螺旋状導電部２２２Ｃは、第２の切り欠き部２４Ｂの半径方向の底面に当接している。また、第２の摩擦部材２１６Ｂの周方向の側面が第２の切り欠き部２４Ｂの周方向の側壁に例えば接着剤などにより取り付けられている。 Further, the third spiral conductive portion 222B and the fourth spiral conductive portion 222C of the second conductive member 222 and the second friction member 216B are arranged in the second notch portion 24B. The third spiral conductive portion 222B and the fourth spiral conductive portion 222C of the second conductive member 222 are in contact with the bottom surface of the second notch portion 24B in the radial direction. Further, the side surface of the second friction member 216B in the circumferential direction is attached to the side wall of the second notch portion 24B in the circumferential direction by, for example, an adhesive.

図１０に示すように、カムフォロア１２は、円筒状の軸部１２Ａと、軸部１２Ａよりも径が大きく軸部１２Ａの端部に接続された頭部１２Ｂとを備える。カムフォロア１２は、カム筒８のカム溝１８及び縦溝筒７の縦溝７を挿通して、レンズ枠１０に取り付けられている。カムフォロア１２の軸部１２Ａは、第１の摩擦部材２１６Ａと第２の摩擦部材２１６Ｂとの間に位置するように配置されている。なお、カムフォロア１２の形状は円形に限らず、矩形状などにしてもよい。後述するように、第１の螺旋状導電部２２０Ｃ及び第２の螺旋状導電部２２０Ｄと、第３の螺旋状導電部２２２Ｂ及び第４の螺旋状導電部２２２Ｃとに電流が印加されていない状態で、第１の摩擦部材２１６Ａ及び第２の摩擦部材２１６Ｂは、カムフォロア１２から離間している。 As shown in FIG. 10, the cam follower 12 includes a cylindrical shaft portion 12A and a head portion 12B having a diameter larger than that of the shaft portion 12A and connected to an end portion of the shaft portion 12A. The cam follower 12 is attached to the lens frame 10 by inserting the cam groove 18 of the cam cylinder 8 and the vertical groove 7 of the vertical groove cylinder 7. The shaft portion 12A of the cam follower 12 is arranged so as to be located between the first friction member 216A and the second friction member 216B. The shape of the cam follower 12 is not limited to a circular shape, but may be a rectangular shape or the like. As will be described later, a state in which no current is applied to the first spiral conductive portion 220C and the second spiral conductive portion 220D, and the third spiral conductive portion 222B and the fourth spiral conductive portion 222C. The first friction member 216A and the second friction member 216B are separated from the cam follower 12.

以下、本発明の第３実施形態によるレンズ鏡筒４を有する撮像装置１の操作方法を説明する。
ズーミング操作を行う場合には、撮影者はスイッチ６を操作して、第１の螺旋状導電部２２０Ｃ及び第２の螺旋状導電部２２０Ｄと、第３の螺旋状導電部２２２Ｂ及び第４の螺旋状導電部２２２Ｃとに電流が流れていない無通電状態に切り替える。このような無通電状態では、第１の摩擦部材２１６Ａ及び第２の摩擦部材２１６Ｂは変形することがなく、カムフォロア１２から離間している。これにより、撮影者は少ないトルクでズーミング操作を行うことができる。 Hereinafter, an operation method of the image pickup apparatus 1 having the lens barrel 4 according to the third embodiment of the present invention will be described.
When performing the zooming operation, the photographer operates the switch 6 to operate the first spiral conductive portion 220C and the second spiral conductive portion 220D, and the third spiral conductive portion 222B and the fourth spiral. The state is switched to a non-energized state in which no current is flowing through the conductive portion 222C. In such a non-energized state, the first friction member 216A and the second friction member 216B are not deformed and are separated from the cam follower 12. As a result, the photographer can perform the zooming operation with a small amount of torque.

これに対して、ズームを固定したい場合には、撮影者はスイッチ６を操作して、第１の螺旋状導電部２２０Ｃ及び第２の螺旋状導電部２２０Ｄに逆方向に電流が流れるとともに、第３の螺旋状導電部２２２Ｂ及び第４の螺旋状導電部２２２Ｃに逆方向に電流が流れる逆電流状態に切り替える。第１の螺旋状導電部２２０Ｃ及び第２の螺旋状導電部２２０Ｄに逆方向に電流が流れると、これら第１の螺旋状導電部２２０Ｃ及び第２の螺旋状導電部２２０Ｄが離間するため、第１の摩擦部材２１６Ａが幅方向に広がり、第１の摩擦部材２１６Ａの側面がカムフォロア１２に当接する。また、第３の螺旋状導電部２２２Ｂ及び第４の螺旋状導電部２２２Ｃに逆方向に電流が流れると、これら第３の螺旋状導電部２２２Ｂ及び第４の螺旋状導電部２２２Ｃが離間するため、第２の摩擦部材２１６Ｂが幅方向に広がり、第２の摩擦部材２１６Ｂの側面がカムフォロア１２に当接する。この状態でカム筒８に対してレンズ枠１０を回転させようとしても、第１の摩擦部材２１６Ａ及び第２の摩擦部材２１６Ｂと、カムフォロア１２の軸部１２Ａの間に大きな摩擦力が発生する。このため、カム筒８に対してレンズ枠１０を回転させるためのトルクが大きくなり、例えば、レンズ鏡筒４が傾いたとしても自重によりレンズ枠１０がカム筒８に対して移動することがなくなる。 On the other hand, when it is desired to fix the zoom, the photographer operates the switch 6 to allow current to flow in the first spiral conductive portion 220C and the second spiral conductive portion 220D in the opposite direction, and at the same time, the second The switch is switched to a reverse current state in which a current flows in the reverse direction to the spiral conductive portion 222B of 3 and the spiral conductive portion 222C of the fourth spiral. When a current flows in the first spiral conductive portion 220C and the second spiral conductive portion 220D in the opposite direction, the first spiral conductive portion 220C and the second spiral conductive portion 220D are separated from each other. The friction member 216A of 1 spreads in the width direction, and the side surface of the first friction member 216A comes into contact with the cam follower 12. Further, when a current flows in the third spiral conductive portion 222B and the fourth spiral conductive portion 222C in the opposite direction, the third spiral conductive portion 222B and the fourth spiral conductive portion 222C are separated from each other. , The second friction member 216B spreads in the width direction, and the side surface of the second friction member 216B comes into contact with the cam follower 12. Even if the lens frame 10 is rotated with respect to the cam cylinder 8 in this state, a large frictional force is generated between the first friction member 216A and the second friction member 216B and the shaft portion 12A of the cam follower 12. Therefore, the torque for rotating the lens frame 10 with respect to the cam cylinder 8 becomes large, and for example, even if the lens barrel 4 is tilted, the lens frame 10 does not move with respect to the cam cylinder 8 due to its own weight. ..

以上説明したように、本実施形態によれば、以下の効果が奏される。
本実施形態によれば、第１の導電部材２２０の第１の螺旋状導電部２２０Ｃ及び第２の螺旋状導電部２２０Ｄに電流を印加することにより、第１の螺旋状導電部２２０Ｃ及び第２の螺旋状導電部２２０Ｄを離間させて、第１の摩擦部材２１６Ａとカムフォロア１２との間の摩擦力が大きい状態（逆電流状態）と、摩擦力がない状態（無通電状態）とを切り替えることができる。これにより、撮影者のズーミング操作時にはカムフォロア１２と第１の摩擦部材２１６Ａとの間の摩擦力がない状態とすることにより、操作トルクが小さくなり、スムーズな操作が可能になる。また、ズーム状態を固定する場合にはカムフォロア１２と第１の摩擦部材２１６Ａとの間の摩擦力が大きい状態とすることにより、操作トルクを大きくして、自重によるレンズの移動を防止できる。 As described above, according to the present embodiment, the following effects are achieved.
According to the present embodiment, by applying an electric current to the first spiral conductive portion 220C and the second spiral conductive portion 220D of the first conductive member 220, the first spiral conductive portion 220C and the second spiral conductive portion 220C and the second spiral conductive portion 220D are applied. The spiral conductive portion 220D of the above is separated from each other to switch between a state in which the frictional force between the first friction member 216A and the cam follower 12 is large (reverse current state) and a state in which there is no frictional force (non-energized state). Can be done. As a result, the operation torque is reduced and smooth operation is possible by making the cam follower 12 and the first friction member 216A have no frictional force during the zooming operation of the photographer. Further, when the zoom state is fixed, the operating torque can be increased and the movement of the lens due to its own weight can be prevented by setting the frictional force between the cam follower 12 and the first friction member 216A to be large.

また、本実施形態によれば、カム溝１８の他方の縁に沿って設けられた第２の摩擦部材２１６Ｂを備え、第２の導電部材２２２の第３の螺旋状導電部２２２Ｂ及びが第４の螺旋状導電部２２２Ｃが第２の摩擦部材２１６Ｂに取り付けられている。これにより、逆電流状態において第１の摩擦部材２１６Ａと第２の摩擦部材２１６Ｂとによりカムフォロア１２を挟み込み、より強固にズーム状態を固定することができる。 Further, according to the present embodiment, the second friction member 216B provided along the other edge of the cam groove 18 is provided, and the third spiral conductive portion 222B and the fourth conductive member 222 of the second conductive member 222 are provided. The spiral conductive portion 222C of the above is attached to the second friction member 216B. As a result, the cam follower 12 can be sandwiched between the first friction member 216A and the second friction member 216B in the reverse current state, and the zoom state can be fixed more firmly.

また、本実施形態によれば、カム筒８には、カム溝１８の一方の縁に沿うように形成された切り欠き部２４Ａ、２４Ｂが形成されており、第１の摩擦部材２１６Ａ及び第２の摩擦部材２１６Ｂは切り欠き部２４Ａ、２４Ｂに配置されている。これにより、第１の摩擦部材２１６Ａ及び第２の摩擦部材２１６Ｂがカム筒８の外部に突出することがない。 Further, according to the present embodiment, the cam cylinder 8 is formed with notches 24A and 24B formed along one edge of the cam groove 18, and the first friction member 216A and the second friction member 216A and the second are formed. The friction member 216B of the above is arranged in the notches 24A and 24B. As a result, the first friction member 216A and the second friction member 216B do not protrude to the outside of the cam cylinder 8.

なお、本実施形態では、カム溝１８の両縁にそれぞれ第１の摩擦部材２１６Ａ及び第２の摩擦部材２１６Ｂを設けているが、第２の摩擦部材２１６Ｂを省略し、第１の摩擦部材２１６Ａのみをカムフォロア１２の軸部１２Ａに当接した状態と、軸部１２Ａから離間した状態とを切り替えられる構成としてもよい。このような場合には、第１の螺旋状導電部２２０Ｃ及び第２の螺旋状導電部２２０Ｄの通電状態を切り替えることにより、第１の摩擦部材１６Ａとカムフォロア１２との摩擦力を変更することができる。 In the present embodiment, the first friction member 216A and the second friction member 216B are provided on both edges of the cam groove 18, but the second friction member 216B is omitted and the first friction member 216A is omitted. The configuration may be such that it is possible to switch between a state in which only the cam follower 12 is in contact with the shaft portion 12A and a state in which the cam follower 12 is separated from the shaft portion 12A. In such a case, the frictional force between the first friction member 16A and the cam follower 12 can be changed by switching the energized state of the first spiral conductive portion 220C and the second spiral conductive portion 220D. it can.

また、本実施形態では、無通電状態において第１の摩擦部材２１６Ａ及び第２の摩擦部材２１６Ｂが、カムフォロア１２の軸部１２Ａから離間し、逆電流状態において第１の摩擦部材２１６Ａ及び第２の摩擦部材２１６Ｂが、カムフォロア１２の軸部１２Ａに当接する構成としたが本発明はこれに限られない。例えば、順電流状態において第１の摩擦部材２１６Ａ及び第２の摩擦部材２１６Ｂが、カムフォロア１２の軸部１２Ａから離間し、無通電状態において第１の摩擦部材２１６Ａ及び第２の摩擦部材２１６Ｂがカムフォロア１２の軸部１２Ａに当接する構成としてもよい（順電流状態と無通電状態との切り替え）。また、例えば、順電流状態において第１の摩擦部材２１６Ａ及び第２の摩擦部材２１６Ｂが、カムフォロア１２の軸部１２Ａから離間し、逆電流状態において第１の摩擦部材２１６Ａ及び第２の摩擦部材２１６Ｂがカムフォロア１２の軸部１２Ａに当接する構成としてもよい（無通電状態と逆電流状態との切り替え）。 Further, in the present embodiment, the first friction member 216A and the second friction member 216B are separated from the shaft portion 12A of the cam follower 12 in the non-energized state, and the first friction member 216A and the second friction member 216A and the second in the reverse current state. The friction member 216B is configured to come into contact with the shaft portion 12A of the cam follower 12, but the present invention is not limited to this. For example, the first friction member 216A and the second friction member 216B are separated from the shaft portion 12A of the cam follower 12 in the forward current state, and the first friction member 216A and the second friction member 216B are cam followers in the non-energized state. It may be configured to abut on the shaft portion 12A of the twelve (switching between the forward current state and the non-energized state). Further, for example, the first friction member 216A and the second friction member 216B are separated from the shaft portion 12A of the cam follower 12 in the forward current state, and the first friction member 216A and the second friction member 216B are separated in the reverse current state. May come into contact with the shaft portion 12A of the cam follower 12 (switching between the non-energized state and the reverse current state).

また、必ずしも、ズーム操作時に、第１の摩擦部材１６Ａ及び第２の摩擦部材１６Ｂが、カムフォロア１２の軸部１２Ａから完全に離間する必要はなく、第１の摩擦部材１６Ａ及び第２の摩擦部材１６Ｂと軸部１２Ａとの摩擦力が小さい状態となればよい（本明細書では、近接（当接）した状態よりも摩擦力が小さい状態（完全には離間していない状態）も含めて「離間」と呼称する）。
換言すれば、本発明は、第１の導電部材２２０の第１の螺旋状導電部２２０Ｃ及び第２の螺旋状導電部２２０Ｄ（及び、第２の導電部材２２２の第３の螺旋状導電部２２２Ｂ及びが第４の螺旋状導電部２２２Ｃ）に対する電流の印加状態を切り替えることにより、カムフォロア１２に対する第１の摩擦部材１６Ａ（及び第２の摩擦部材１６Ｂ）の付勢状態（近接状態と離間状態）を切り替える。これによって、上述の通り、操作トルクを大きくすることなく、自重によるレンズの移動を防止することができる。 Further, the first friction member 16A and the second friction member 16B do not necessarily have to be completely separated from the shaft portion 12A of the cam follower 12 during the zoom operation, and the first friction member 16A and the second friction member 16A and the second friction member do not necessarily have to be completely separated from each other. It suffices if the frictional force between 16B and the shaft portion 12A is small (in the present specification, the frictional force is smaller than that in the state of being close (contacted) (the state of not being completely separated). It is called "separation").
In other words, the present invention presents the first spiral conductive portion 220C and the second spiral conductive portion 220D of the first conductive member 220 (and the third spiral conductive portion 222B of the second conductive member 222). By switching the application state of the current to the fourth spiral conductive portion 222C), the urging state (proximity state and separation state) of the first friction member 16A (and the second friction member 16B) with respect to the cam follower 12). To switch. As a result, as described above, it is possible to prevent the lens from moving due to its own weight without increasing the operating torque.

また、上記各実施形態では、カム筒８に螺旋状に形成されたカム溝１８にカムフォロア１２が入り込んだ構造に本発明を適用したが、これに限らず、縦溝筒７に光軸方向に延びるように形成された縦溝１７や、周方向に延びるように形成された周方向溝にも本発明を適用できる。本発明では、これらカム溝１８、縦溝１７、及び周方向溝をガイド溝という。また、上記各実施形態では、カム筒８は縦溝筒７に対して光軸方向に移動しないが、カム筒８が縦溝筒７に対して光軸方向に移動する構成としてもよい。 Further, in each of the above embodiments, the present invention is applied to a structure in which the cam follower 12 is inserted into the cam groove 18 spirally formed in the cam cylinder 8, but the present invention is not limited to this, and the vertical groove cylinder 7 is provided with the vertical groove cylinder 7 in the optical axis direction. The present invention can also be applied to a longitudinal groove 17 formed so as to extend and a circumferential groove formed so as to extend in the circumferential direction. In the present invention, these cam grooves 18, vertical grooves 17, and circumferential grooves are referred to as guide grooves. Further, in each of the above embodiments, the cam cylinder 8 does not move in the optical axis direction with respect to the vertical groove cylinder 7, but the cam cylinder 8 may move in the optical axis direction with respect to the vertical groove cylinder 7.

また、上記各実施形態では、カム筒８に対してレンズ枠１０が移動する構成に本発明を適用した場合について説明したが、固定筒に対してカム筒が移動する場合などであっても本発明を適用することができる。さらに、上記各実施形態では、本発明をレンズ枠１０を光軸方向に移動させることによりズーミングを行う機構に適用した場合について説明したが、これに限らず、フォーカシングを行う機構に適用することも可能である。 Further, in each of the above embodiments, the case where the present invention is applied to the configuration in which the lens frame 10 moves with respect to the cam cylinder 8 has been described, but even when the cam cylinder moves with respect to the fixed cylinder, the present invention has been described. The invention can be applied. Further, in each of the above embodiments, the case where the present invention is applied to a mechanism for zooming by moving the lens frame 10 in the optical axis direction has been described, but the present invention is not limited to this and may be applied to a mechanism for focusing. It is possible.

また、上記各実施形態では、切替手段として撮影者が操作可能なスイッチを設けているが、カメラ本体のディスプレイにON/OFF切替用ＵＩを表示し、入力を受け付けてもよい。さらに、レンズ群の移動量やカム筒８の回転量を検知して、自重による落下を検知すると第１の摩擦部材１６Ａ（及び第２の摩擦部材１６Ｂ）の付勢状態（近接状態と離間状態）を切り替えるような構成の切替手段を設けてもよい。 Further, in each of the above embodiments, a switch that can be operated by the photographer is provided as a switching means, but an ON / OFF switching UI may be displayed on the display of the camera body to accept input. Further, when the movement amount of the lens group and the rotation amount of the cam cylinder 8 are detected and the drop due to its own weight is detected, the first friction member 16A (and the second friction member 16B) is urged (proximity state and separation state). ) May be provided.

１ 撮像装置
２ 撮像装置本体
２Ａ バッテリー
４ レンズ鏡筒
６ スイッチ
７ 縦溝筒
８ カム筒
１０ レンズ枠
１２ カムフォロア
１２Ａ 軸部
１２Ｂ 頭部
１２Ｃ ビス
１４ 導電部材アセンブリ
１６ 摩擦部材アセンブリ
１６Ａ 第１の摩擦部材
１６Ｂ 第２の摩擦部材
１７ 縦溝
１８ カム溝
２０ 第１の導電部材
２０Ａ 円環部
２０Ｂ 突部
２０Ｃ 第１の螺旋状導電部
２２ 第２の導電部材
２２Ａ 円弧状部
２２Ｂ 第２の螺旋状導電部
２４Ａ 第１の切り欠き部
２４Ｂ 第２の切り欠き部
１１４ 導電部材アセンブリ
１１６ 摩擦部材アセンブリ
１１６Ａ 第１の摩擦部材
１１６Ｂ 第２の摩擦部材
１２０ 第１の導電部材
１２０Ａ 円環部
１２０Ｂ 突部
１２０Ｃ 第１の螺旋状導電部
１２２ 第２の導電部材
１２２Ａ 円弧状部
１２２Ｂ 第２の螺旋状導電部
２１４ 導電部材アセンブリ
２１６ 摩擦部材アセンブリ
２１６Ａ 第１の摩擦部材
２１６Ｂ 第２の摩擦部材
２２０ 第１の導電部材
２２０Ａ 円環部
２２０Ｂ 突部
２２０Ｃ 第１の螺旋状導電部
２２０Ｄ 第２の螺旋状導電部
２２２ 第２の導電部材
２２２Ａ 円弧状部
２２２Ｂ 第３の螺旋状導電部
２２２Ｃ 第４の螺旋状導電部 1 Imaging device 2 Imaging device body 2A Battery 4 Lens barrel 6 Switch 7 Vertical groove cylinder 8 Cam cylinder 10 Lens frame 12 Cam follower 12A Shaft 12B Head 12C Screw 14 Conductive member assembly 16 Friction member assembly 16A First friction member 16B Second Friction Member 17 Vertical Groove 18 Cam Groove 20 First Conductive Member 20A Circular Part 20B Protrusion 20C First Spiral Conductive Part 22 Second Conductive Member 22A Arc Arc 22B Second Spiral Conductive Part 24A First notch 24B Second notch 114 Conductive member assembly 116 Friction member assembly 116A First friction member 116B Second friction member 120 First conductive member 120A Annulus 120B Protrusion 120C First Spiral conductive part 122 Second conductive member 122A Arc-shaped part 122B Second spiral conductive part 214 Conductive member assembly 216 Friction member assembly 216A First friction member 216B Second friction member 220 First conductive member 220A Ring portion 220B Protrusion portion 220C First spiral conductive portion 220D Second spiral conductive portion 222 Second conductive member 222A Arc-shaped portion 222B Third spiral conductive portion 222C Fourth spiral conductive portion

Claims (10)

ガイド溝が形成された筒体と、前記ガイド溝に入り込むように立設されたカムフォロアを有する移動体とを備え、前記筒体に対して前記移動体を軸方向に移動させてレンズを駆動させるレンズ鏡筒であって、
前記ガイド溝の一方の縁に沿って設けられた第１の導電部材と、
前記ガイド溝の他方の縁に沿って設けられた第２の導電部材と、
前記第１の導電部材に取り付けられた第１の摩擦部材と、
前記第１の導電部材及び前記第２の導電部材に対する電流の印加状態を切り替える切替手段と、
を備えている、
ことを特徴とする、レンズ鏡筒。 A cylinder having a guide groove and a moving body having a cam follower erected so as to enter the guide groove are provided, and the moving body is moved in the axial direction with respect to the cylinder to drive a lens. It is a lens barrel
A first conductive member provided along one edge of the guide groove,
A second conductive member provided along the other edge of the guide groove,
With the first friction member attached to the first conductive member,
A switching means for switching the application state of the electric current to the first conductive member and the second conductive member, and
Is equipped with
The lens barrel is characterized by this. さらに、前記ガイド溝の他方の縁に沿って設けられた第２の摩擦部材を備え、
前記第２の導電部材は、前記第２の摩擦部材に取り付けられている、
請求項１に記載のレンズ鏡筒。 Further, a second friction member provided along the other edge of the guide groove is provided.
The second conductive member is attached to the second friction member.
The lens barrel according to claim 1. 前記第１の導電部材及び前記第２の導電部材は、それぞれ、前記第１の摩擦部材及び前記第２の摩擦部材の半径方向内側面に取り付けられている、
請求項２に記載のレンズ鏡筒。 The first conductive member and the second conductive member are attached to the inner side surfaces in the radial direction of the first friction member and the second friction member, respectively.
The lens barrel according to claim 2. 前記第１の導電部材及び前記第２の導電部材は、それぞれ、前記第１の摩擦部材及び前記第２の摩擦部材の幅方向外面に取り付けられている、
請求項２に記載のレンズ鏡筒。 The first conductive member and the second conductive member are attached to the outer surfaces of the first friction member and the second friction member in the width direction, respectively.
The lens barrel according to claim 2. 前記筒体には、前記ガイド溝の一方の縁に沿うように形成された一方の切り欠き部が形成されており、
前記第１の摩擦部材は前記一方の切り欠き部に配置されている、
請求項１〜４の何れか１項に記載のレンズ鏡筒。 The tubular body is formed with one notch formed along one edge of the guide groove.
The first friction member is arranged in the one notch portion.
The lens barrel according to any one of claims 1 to 4. ガイド溝が形成された筒体と、前記ガイド溝に入り込むように立設されたカムフォロアを有する移動体とを備え、前記筒体に対して前記移動体を軸方向に移動させてレンズを駆動させるレンズ鏡筒であって、
前記ガイド溝の一方の縁に沿って設けられた第１の摩擦部材と、
前記第１の摩擦部材に沿うように、かつ、前記第１の摩擦部材に幅方向に並ぶように取り付けられた第１の導電部材及び第２の導電部材と、
前記第１の導電部材及び前記第２の導電部材に対する電流の印加状態を切り替える切替手段と、
を備えている、
ことを特徴とする、レンズ鏡筒。 A cylinder having a guide groove and a moving body having a cam follower erected so as to enter the guide groove are provided, and the moving body is moved in the axial direction with respect to the cylinder to drive a lens. It is a lens barrel
A first friction member provided along one edge of the guide groove and
A first conductive member and a second conductive member attached along the first friction member and aligned with the first friction member in the width direction.
A switching means for switching the application state of the electric current to the first conductive member and the second conductive member, and
Is equipped with
The lens barrel is characterized by this. さらに、前記ガイド溝の他方の縁に沿って設けられた第２の摩擦部材と、
前記第２の摩擦部材に沿うように、かつ、前記第２の摩擦部材に幅方向に並ぶように取り付けられた第３の導電部材及び第４の導電部材と、を備え、
前記切替手段は、前記第３の導電部材及び前記第４の導電部材に対する電圧の印加状態を切り替えることができる、
請求項６に記載のレンズ鏡筒。 Further, with a second friction member provided along the other edge of the guide groove,
A third conductive member and a fourth conductive member attached along the second friction member and aligned with the second friction member in the width direction are provided.
The switching means can switch the voltage application state to the third conductive member and the fourth conductive member.
The lens barrel according to claim 6. 前記第１の導電部材及び前記第２の導電部材は、それぞれ、前記第１の摩擦部材の半径方向内側面に取り付けられている、
前記第３の導電部材及び前記第４の導電部材は、それぞれ、前記第２の摩擦部材の半径方向内側面に取り付けられている、
請求項７に記載のレンズ鏡筒。 The first conductive member and the second conductive member are attached to the inner side surface in the radial direction of the first friction member, respectively.
The third conductive member and the fourth conductive member are attached to the inner side surface in the radial direction of the second friction member, respectively.
The lens barrel according to claim 7. 前記筒体には、前記ガイド溝の一方の縁に沿うように形成された一方の切り欠き部が形成されており、
前記第１の摩擦部材は前記一方の切り欠き部に配置されている、
請求項６〜８の何れか１項に記載のレンズ鏡筒。 The tubular body is formed with one notch formed along one edge of the guide groove.
The first friction member is arranged in the one notch portion.
The lens barrel according to any one of claims 6 to 8. 撮像装置本体と、
前記撮像装置本体に取り付けられた、請求項１〜９の何れか１項に記載のレンズ鏡筒と、を有する、撮像装置。 The main body of the image pickup device and
An image pickup apparatus having the lens barrel according to any one of claims 1 to 9 attached to the image pickup apparatus main body.
JP2019172630A 2019-09-24 2019-09-24 Lens barrel and imaging device Active JP7319879B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2019172630A JP7319879B2 (en) 2019-09-24 2019-09-24 Lens barrel and imaging device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2019172630A JP7319879B2 (en) 2019-09-24 2019-09-24 Lens barrel and imaging device

Publications (2)

Publication Number Publication Date
JP2021051127A true JP2021051127A (en) 2021-04-01
JP7319879B2 JP7319879B2 (en) 2023-08-02

Family

ID=75157726

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2019172630A Active JP7319879B2 (en) 2019-09-24 2019-09-24 Lens barrel and imaging device

Country Status (1)

Country Link
JP (1) JP7319879B2 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0545551A (en) * 1991-08-09 1993-02-23 Minolta Camera Co Ltd Camera
JPH08166529A (en) * 1994-12-13 1996-06-25 Mitsubishi Electric Corp Lens barrel
JP2004118023A (en) * 2002-09-27 2004-04-15 Fuji Photo Film Co Ltd Camera
JP2009282395A (en) * 2008-05-23 2009-12-03 Nikon Corp Drive mechanism, lens barrel with the same, and camera
JP2009282394A (en) * 2008-05-23 2009-12-03 Nikon Corp Guide mechanism, lens barrel equipped with the same, and camera

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0545551A (en) * 1991-08-09 1993-02-23 Minolta Camera Co Ltd Camera
JPH08166529A (en) * 1994-12-13 1996-06-25 Mitsubishi Electric Corp Lens barrel
JP2004118023A (en) * 2002-09-27 2004-04-15 Fuji Photo Film Co Ltd Camera
JP2009282395A (en) * 2008-05-23 2009-12-03 Nikon Corp Drive mechanism, lens barrel with the same, and camera
JP2009282394A (en) * 2008-05-23 2009-12-03 Nikon Corp Guide mechanism, lens barrel equipped with the same, and camera

Also Published As

Publication number Publication date
JP7319879B2 (en) 2023-08-02

Similar Documents

Publication Publication Date Title
JP4194569B2 (en) Optical equipment
US7699546B2 (en) Light amount adjusting device and image capture apparatus
US8861103B2 (en) Lens driving apparatus and optical apparatus having the same
JP2013257499A (en) Lens barrel and image pickup apparatus
KR20060047197A (en) Collapsible lens barrel and imaging apparatus
US20110032626A1 (en) Zoom lens barrel that attains a higher photographing magnification
JP4455350B2 (en) Imaging device
US11003047B2 (en) Lens barrel, lens driving device, and image pickup apparatus
JP2010281971A (en) Interchangeable lens and imaging device
JP4218964B2 (en) LENS DEVICE AND IMAGING DEVICE
JP2021051127A (en) Lens barrel and imaging apparatus
JP3393241B2 (en) Lens barrel
JP2016109750A (en) Lens barrel and imaging device
EP2160642B1 (en) Single motor and clutch unit for independently adjusting two lens assemblies
JP6540991B2 (en) Cam mechanism and optical device
JP2006337884A (en) Lens driving device
JP2003185909A (en) Camera
JP2006215421A (en) Lens barrel
JP2011242683A (en) Lens barrel and imaging apparatus having the same
JPH0833385A (en) Control device of voice-coil motor
JP2014010213A (en) Lens barrel
JP4612910B2 (en) LENS DEVICE AND IMAGING DEVICE
JP6493785B2 (en) Lens barrel and imaging device
JP3255571B2 (en) Optical axis direction position detecting device and focal length detecting device for lens barrel
JP2005055588A (en) Lens drive unit, lens barrel and camera

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20220802

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20230529

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20230622

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20230721

R150 Certificate of patent or registration of utility model

Ref document number: 7319879

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150