JP2005122066A

JP2005122066A - Lens barrel and imaging apparatus

Info

Publication number: JP2005122066A
Application number: JP2003359792A
Authority: JP
Inventors: Eiji Miyagaki; 英治宮垣; Yasuto Matsubara; 康人松原
Original assignee: Sony Corp
Current assignee: Sony Corp
Priority date: 2003-10-20
Filing date: 2003-10-20
Publication date: 2005-05-12

Abstract

PROBLEM TO BE SOLVED: To provide a lens barrel and an imaging apparatus having advantage in miniaturization. SOLUTION: A 2nd lens barrel split body 1204 and a 3rd lens barrel split body 1206 are attached by a male screw 204 in a position close to the right side face. A female screw member 48, a supporting plate 3408 and the male screw 204 are arranged so that the contour of the head part 204A of the male screw 204 may overlap the contour of the female screw member 48, and also, the contour of the head part 204A of the male screw 204 may be positioned outside the contour of the supporting plate 3408, viewing from a direction parallel to the optical axis direction of an optical system. COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明はレンズ鏡筒および撮像装置に関する。 The present invention relates to a lens barrel and an imaging device.

従来から、可動レンズ群と、この可動レンズ群が組み込まれる鏡筒と、可動レンズ群を光軸方向に移動させる駆動手段とが設けられたレンズ鏡筒が提供されている。
この種の駆動手段は、光軸方向に平行して延在し回転駆動される雄ねじ部材と、前記雄ねじ部材を支持するホルダと、前記可動レンズ群の部分に前記光軸方向に移動不能に結合されるとともに前記雄ねじ部材にねじ結合される雌ねじ部材とを有している。
そして、ホルダは前記雄ねじ部材の先端を支持する支持板を有し、この支持板と前記雌ねじ部材とは可動レンズ群が組み込まれた部品収容空間内に配設されている（例えば特許文献１参照）。
一方、鏡筒を光軸方向に分割した複数の分割体で構成した場合、これら分割体の締結は、各分割体に光軸方向と直交する方向にフランジを設け、これらフランジをねじで締結することが考えられる。
特許第２８４１６７９号 2. Description of the Related Art Conventionally, there has been provided a lens barrel provided with a movable lens group, a lens barrel in which the movable lens group is incorporated, and driving means for moving the movable lens group in the optical axis direction.
This type of driving means is coupled to the male screw member that extends parallel to the optical axis direction and is driven to rotate, the holder that supports the male screw member, and the movable lens group that is immovable in the optical axis direction. And a female screw member screwed to the male screw member.
The holder has a support plate for supporting the tip of the male screw member, and the support plate and the female screw member are disposed in a component housing space in which a movable lens group is incorporated (see, for example, Patent Document 1). ).
On the other hand, when the lens barrel is composed of a plurality of divided bodies that are divided in the optical axis direction, these divided bodies are fastened by providing flanges in the direction perpendicular to the optical axis direction to each divided body and fastening these flanges with screws. It is possible.
Japanese Patent No. 2841679

しかしながら、このようにフランジを設けたのでは鏡筒の小型化を図る上で不利がある。
本発明は、前記部品収容空間の内部の前記支持板や雌ねじ部材の配設箇所に着目して案出されたものであって、本発明の目的は小型化を図る上で有利なレンズ鏡筒および撮像装置を提供することにある。 However, providing the flange in this way is disadvantageous in reducing the size of the lens barrel.
The present invention has been devised by paying attention to the location of the support plate and the female screw member inside the component housing space, and the object of the present invention is a lens barrel that is advantageous for miniaturization. And providing an imaging apparatus.

上述の目的を達成するため、本発明のレンズ鏡筒は、長さを有する鏡筒と、前記鏡筒の内部の部品収容空間に設けられた撮像素子と、前記鏡筒の内部の部品収容空間に設けられ被写体像を前記撮像素子に導く光学系とを備え、前記鏡筒は前記長さ方向に分割された第１の鏡筒分割体と第２の鏡筒分割体とを有し、前記光学系は、前記第１の鏡筒分割体の部品収容空間に設けられ該光学系の光軸方向に移動可能に設けられた可動レンズ群と、前記可動レンズ群を移動可能に支持する案内機構とを有し、さらに、前記第１の鏡筒分割体には前記可動レンズ群を移動させる駆動手段が設けられ、前記駆動手段は、前記第１の鏡筒分割体の部品収容空間内で前記光軸方向に平行し前記第１の鏡筒分割体の長さ方向に沿って延在し回転駆動される雄ねじ部材と、前記雄ねじ部材を支持するホルダと、前記可動レンズ群の部分に前記光軸方向に移動不能に結合されるとともに前記雄ねじ部材にねじ結合される雌ねじ部材とを有し、前記ホルダは、第１の鏡筒分割体の部品収容空間に配設され前記雄ねじ部材の先端を支持し前記第１の鏡筒分割体の前記第２の鏡筒分割体寄りの壁部に臨む支持板を有し、前記第１の鏡筒分割体と第２の鏡筒分割体とは、第１の鏡筒分割体側から前記壁部に挿通され第１の鏡筒分割体の部品収容空間内で前記壁部に頭部が位置する雄ねじにより締結され、前記雌ねじ部材と支持板と雄ねじとは、前記光学系の光軸方向と平行する方向から見て前記雄ねじの頭部の輪郭と前記雌ねじ部材の輪郭とが重複し、かつ、前記雄ねじの頭部の輪郭が前記支持板の輪郭の外側に位置するように配置されていることを特徴とする。
また、本発明の撮像装置は、長さを有する鏡筒と、前記鏡筒の内部の部品収容空間に設けられた撮像素子と、前記鏡筒の内部の部品収容空間に設けられ被写体像を前記撮像素子に導く光学系とを備えたレンズ鏡筒を有する撮像装置であって、前記鏡筒は前記長さ方向に分割された第１の鏡筒分割体と第２の鏡筒分割体とを有し、前記光学系は、前記第１の鏡筒分割体の部品収容空間に設けられ該光学系の光軸方向に移動可能に設けられた可動レンズ群と、前記可動レンズ群を移動可能に支持する案内機構とを有し、さらに、前記第１の鏡筒分割体には前記可動レンズ群を移動させる駆動手段が設けられ、前記駆動手段は、前記第１の鏡筒分割体の部品収容空間内で前記光軸方向に平行し前記第１の鏡筒分割体の長さ方向に沿って延在し回転駆動される雄ねじ部材と、前記雄ねじ部材を支持するホルダと、前記可動レンズ群の部分に前記光軸方向に移動不能に結合されるとともに前記雄ねじ部材にねじ結合される雌ねじ部材とを有し、前記ホルダは、第１の鏡筒分割体の部品収容空間に配設され前記雄ねじ部材の先端を支持し前記第１の鏡筒分割体の前記第２の鏡筒分割体寄りの壁部に臨む支持板を有し、前記第１の鏡筒分割体と第２の鏡筒分割体とは、第１の鏡筒分割体側から前記壁部に挿通され第１の鏡筒分割体の部品収容空間内で前記壁部に頭部が位置する雄ねじにより締結され、前記雌ねじ部材と支持板と雄ねじとは、前記光学系の光軸方向と平行する方向から見て前記雄ねじの頭部の輪郭と前記雌ねじ部材の輪郭とが重複し、かつ、前記雄ねじの頭部の輪郭が前記支持板の輪郭の外側に位置するように配置されていることを特徴とする。 In order to achieve the above-described object, a lens barrel according to the present invention includes a lens barrel having a length, an image sensor provided in a component accommodating space inside the lens barrel, and a component accommodating space inside the lens barrel. An optical system that guides a subject image to the image sensor, and the lens barrel includes a first lens barrel divided body and a second lens barrel divided body divided in the length direction, An optical system includes a movable lens group that is provided in a component housing space of the first lens barrel divided body and is movably provided in an optical axis direction of the optical system, and a guide mechanism that movably supports the movable lens group. Further, the first lens barrel divided body is provided with driving means for moving the movable lens group, and the driving means is arranged in the component housing space of the first lens barrel divided body. A male screw that is parallel to the optical axis direction and extends along the length direction of the first lens barrel divided body and is rotationally driven. A material, a holder that supports the male screw member, and a female screw member that is coupled to the portion of the movable lens group so as to be immovable in the optical axis direction and is screw-coupled to the male screw member. A support plate is provided in the component housing space of the first lens barrel divided body to support the tip of the male screw member and to face the wall portion of the first lens barrel divided body near the second lens barrel divided body. The first lens barrel divided body and the second lens barrel divided body are inserted into the wall portion from the first lens barrel divided body side, and the wall in the component housing space of the first lens barrel divided body. The female screw member, the support plate, and the male screw are fastened by a male screw whose head is positioned at the portion, and the contour of the male screw head and the contour of the female screw member are viewed from a direction parallel to the optical axis direction of the optical system. And the contour of the head of the male screw is positioned outside the contour of the support plate. Characterized in that it is arranged to.
The imaging apparatus of the present invention includes a lens barrel having a length, an image sensor provided in a component accommodating space inside the lens barrel, and a subject image provided in a component accommodating space inside the lens barrel. An imaging apparatus having a lens barrel including an optical system that leads to an imaging element, wherein the lens barrel includes a first lens barrel divided body and a second lens barrel divided body that are divided in the length direction. The optical system includes a movable lens group provided in a component housing space of the first lens barrel divided body and movably provided in an optical axis direction of the optical system; and the movable lens group is movable. And a driving mechanism for moving the movable lens group is provided in the first lens barrel divided body, and the driving means accommodates parts of the first lens barrel divided body. A rotary drive extending in the length direction of the first barrel segment in parallel with the optical axis direction in the space. A male screw member, a holder that supports the male screw member, and a female screw member that is coupled to the movable lens group portion so as not to move in the optical axis direction and is screw-coupled to the male screw member, The holder is disposed in the component housing space of the first lens barrel divided body, supports the tip of the male screw member, and supports the wall facing the second lens barrel divided body of the first lens barrel divided body. The first lens barrel divided body and the second lens barrel divided body are inserted into the wall portion from the first lens barrel divided body side, and are within the component housing space of the first lens barrel divided body. The female screw member, the support plate, and the male screw are fastened by a male screw whose head is positioned on the wall portion, and the head of the male screw and the female screw are seen from a direction parallel to the optical axis direction of the optical system. The contour of the member overlaps, and the contour of the head of the male screw is Characterized in that it is arranged to be positioned outside of Guo.

そのため、本発明によれば、雌ねじ部材と支持板と雄ねじとは、光学系の光軸方向と平行する方向から見て雄ねじの頭部の輪郭と雌ねじ部材の輪郭とが重複し、かつ、雄ねじの頭部の輪郭が支持板の輪郭の外側に位置するように配置されている。
したがって、デッドスペースである雌ねじ部材の上方の隙間を利用して、第１、第２の鏡筒分割体を締結する雄ねじの頭部が支持板に干渉することなく部品収容空間内に配置されており、光軸方向に沿った部品収容空間の長さおよび第２の鏡筒分割体の長さを短縮し、これによりレンズ鏡筒をコンパクト化する上で有利となる。
また、雄ねじは部品収容空間に配置されるので、第１、第２の鏡筒分割体締結用の雄ねじを配設するにあたり、第１、第２の鏡筒分割体に光軸方向と直交する方向に突出するフランジなどの突出部を設ける必要が無くなり、したがって、鏡筒の小型化を図る上で、また、鏡筒を撮像装置に組み込む際に鏡筒周囲に生じるデッドスペースを無くす上で有利となる。 Therefore, according to the present invention, the female screw member, the support plate, and the male screw overlap the outline of the head of the male screw and the outline of the female screw member when viewed from the direction parallel to the optical axis direction of the optical system, and the male screw It is arranged so that the outline of the head of the head is located outside the outline of the support plate.
Therefore, using the gap above the female screw member that is a dead space, the head of the male screw that fastens the first and second lens barrel divided bodies is arranged in the component housing space without interfering with the support plate. Thus, the length of the component housing space along the optical axis direction and the length of the second lens barrel divided body are shortened, which is advantageous in making the lens barrel compact.
Further, since the male screw is disposed in the component housing space, the first and second lens barrel divided bodies are orthogonal to the optical axis direction when the first and second lens barrel divided body fastening male screws are disposed. This eliminates the need to provide a projecting portion such as a flange projecting in the direction, and is therefore advantageous in reducing the size of the lens barrel and eliminating the dead space around the lens barrel when the lens barrel is incorporated in the imaging apparatus. It becomes.

無駄なスペースの発生を抑制するとともに小型化を図るという目的を、幅および長さ並びに厚さを有する平板形状の鏡筒を採用し、かつ、この鏡筒の内部に可動レンズ群とメインガイド軸とサブガイド軸とを効率的に配置することによって実現した。 For the purpose of suppressing the generation of wasted space and reducing the size, a flat lens barrel having a width, a length and a thickness is employed, and the movable lens group and the main guide shaft are disposed inside the lens barrel. And the sub-guide shaft are efficiently arranged.

次に本発明の実施例１について図面を参照して説明する。
本実施例では、本発明のレンズ鏡筒が撮像装置に組み込まれている場合について説明する。
図１は実施例１の撮像装置を前方から見た斜視図、図２は実施例１の撮像装置を後方から見た斜視図、図３は実施例１の撮像装置を下方から見た斜視図、図４はメモリカードおよびバッテリーの収容状態を説明する説明図、図５は撮像装置の制御系を示すブロック図である。
図１、図２に示すように、撮像装置１００はデジタルスチルカメラであって、外装を構成する矩形板状のケース１０２を有し、ケース１０２は、前側ケース１０２Ａと後側ケース１０２Ｂとが合わせられて構成され、前側ケース１０２Ａによりケース１０２の前面が構成され、後側ケース１０２Ｂによりケース１０２の後面が構成されている。なお、本明細書においてケース１０２の左右はケース１０２を前方から見た状態でいうものとする。
ケース１０２の右側部には、図中二点鎖線で示すように、本発明に係るレンズ鏡筒１０が組み込まれており、レンズ鏡筒１０には、対物レンズ１４と、撮像素子１２８と、対物レンズ１４で捉えた被写体像を撮像素子１２８に導く光学系１０４などが設けられている。
対物レンズ１４は前側ケース１０２Ａに設けられたレンズ窓１０３を介してケース１０２前方に臨んで配置されている。
ケース１０２の前面右寄りの箇所には、撮影補助光を出射するフラッシュ１０８、セルフタイマーランプ１１０などが設けられている。
ケース１２の前面にはカバー１１２が上下にスライド可能に設けられ、このカバー１１２は、図１に示すようにレンズ窓１０３、フラッシュ１０８、セルフタイマーランプ１１０を前方に露出させる下限位置と、これらレンズ窓１０３、フラッシュ１０８、セルフタイマーランプ１１０を覆う上限位置とにスライドされる。
ケース１２の上面の左寄り箇所には、シャッターボタン１１４、電源ボタン１１６などが設けられている。
ケース１２の後面には静止画および動画などの画像や文字や記号などが表示されるディスプレイ１１８（液晶表示器）、撮影光学系１０４のズーミング動作を行なわせるためのズームスイッチ１２０、各種操作を行なうための十字スイッチ１２２および複数の操作ボタン１２４が設けられている。
ケース１２の左側面には、撮像装置１００を静止画撮影モード、動画撮影モード、再生・編集モードなどに切り替えるためのモードスイッチ１２６が設けられている。
図３、図４に示すように、ケース１０２の下面には、静止画あるいは動画などの画像などを記録するためのメモリカード１３２を装脱可能に収容するメモリ収容室１０２Ａと、撮像装置１００の電源を構成するバッテリー１３８を装脱可能に収容するバッテリー収容室１０２Ｂとがケース１２の前後方向（厚さ方向）に並べて設けられている。これらメモリ収容室１０２Ａ、バッテリー収容室１０２Ｂはケース１０２の下面にヒンジを介して連結された開閉蓋１０２Ｃによって開閉される。 Next, Embodiment 1 of the present invention will be described with reference to the drawings.
In this embodiment, a case where the lens barrel of the present invention is incorporated in an imaging apparatus will be described.
1 is a perspective view of the image pickup apparatus of the first embodiment as viewed from the front, FIG. 2 is a perspective view of the image pickup apparatus of the first embodiment as viewed from the rear, and FIG. 3 is a perspective view of the image pickup apparatus of the first embodiment as viewed from below. FIG. 4 is an explanatory diagram for explaining a storage state of the memory card and the battery, and FIG. 5 is a block diagram showing a control system of the imaging apparatus.
As shown in FIGS. 1 and 2, the imaging apparatus 100 is a digital still camera, and includes a rectangular plate-like case 102 that constitutes an exterior, and the case 102 includes a front case 102A and a rear case 102B. The front case 102A constitutes the front surface of the case 102, and the rear case 102B constitutes the rear surface of the case 102. In the present specification, the left and right sides of the case 102 are assumed to be viewed from the front.
As shown by a two-dot chain line in the drawing, the lens barrel 10 according to the present invention is incorporated in the right side portion of the case 102. The lens barrel 10 includes an objective lens 14, an image sensor 128, and an objective. An optical system 104 that guides the subject image captured by the lens 14 to the image sensor 128 is provided.
The objective lens 14 is disposed facing the front of the case 102 through a lens window 103 provided in the front case 102A.
A flash 108 that emits photographing auxiliary light, a self-timer lamp 110, and the like are provided at a position on the right side of the front surface of the case 102.
A cover 112 is provided on the front surface of the case 12 so as to be slidable up and down. As shown in FIG. 1, the cover 112 has a lower limit position for exposing the lens window 103, the flash 108, and the self-timer lamp 110 forward, and these lenses. It is slid to the upper limit position covering the window 103, the flash 108, and the self-timer lamp 110.
A shutter button 114, a power button 116, and the like are provided on the left side of the upper surface of the case 12.
On the rear surface of the case 12, a display 118 (liquid crystal display) on which images such as still images and moving images, characters and symbols are displayed, a zoom switch 120 for performing a zooming operation of the photographing optical system 104, and various operations are performed. A cross switch 122 and a plurality of operation buttons 124 are provided.
A mode switch 126 for switching the imaging device 100 to a still image shooting mode, a moving image shooting mode, a playback / editing mode, or the like is provided on the left side surface of the case 12.
As shown in FIGS. 3 and 4, on the lower surface of the case 102, a memory accommodating chamber 102 A that detachably accommodates a memory card 132 for recording an image such as a still image or a moving image, and the imaging device 100. A battery housing chamber 102B for detachably housing the battery 138 constituting the power source is provided in the front-rear direction (thickness direction) of the case 12. The memory housing chamber 102A and the battery housing chamber 102B are opened and closed by an opening / closing lid 102C connected to the lower surface of the case 102 via a hinge.

図５に示すように、撮像素子１２８は、光学系１０４によって結像された被写体像を撮像するＣＣＤやＣＭＯＳセンサなどで構成されている。
撮像素子１２８で撮像された像は撮像信号として画像処理部１３０に出力され、画像処理部１３０ではこの撮像信号に基づいて静止画あるいは動画の画像データが生成され、メモリカード（記憶媒体）１３２に記録される。また、前記画像データは表示処理部１３４によりディスプレイ１１８に表示される。
さらに、撮像装置１００は、シャッタボタン１１４、十字スイッチ１２２、操作ボタン１２４、モードスイッチ１２６の操作に応じて、画像処理部１３０、表示処理部１３４を制御するＣＰＵなどを含む制御部１３６を備えている。 As shown in FIG. 5, the image sensor 128 includes a CCD, a CMOS sensor, or the like that captures a subject image formed by the optical system 104.
An image picked up by the image pickup device 128 is output as an image pickup signal to the image processing unit 130, and the image processing unit 130 generates image data of a still image or a moving image based on the image pickup signal and stores it in a memory card (storage medium) 132. To be recorded. The image data is displayed on the display 118 by the display processing unit 134.
Furthermore, the imaging apparatus 100 includes a control unit 136 including a CPU that controls the image processing unit 130 and the display processing unit 134 in response to operations of the shutter button 114, the cross switch 122, the operation button 124, and the mode switch 126. Yes.

図６はレンズ鏡筒１０を斜め前方から見た斜視図、図７はレンズ鏡筒１０を斜め後方から見た斜視図、図８はレンズ鏡筒１０の一部の構成を示す分解斜視図、図９はレンズ鏡筒１０の残りの構成を示す分解斜視図、図１０は図６のＸＸ線断面図、図１１は図６のＹＹ線断面図、図１２はレンズ鏡筒１０の左側部分の断面斜視図、図１３はレンズ鏡筒１０の右側部分の断面斜視図、図１４は第１鏡筒分割体１２０２の横断面図、図１５は第２鏡筒分割体１２０４の横断面図、図１６はズーム用可動レンズ群１８、フォーカス用可動レンズ群２０の斜視図、図１７は第２鏡筒分割体１２０４の要部の断面斜視図である。 6 is a perspective view of the lens barrel 10 as viewed obliquely from the front, FIG. 7 is a perspective view of the lens barrel 10 as viewed from obliquely rear, and FIG. 8 is an exploded perspective view showing a part of the configuration of the lens barrel 10. 9 is an exploded perspective view showing the remaining structure of the lens barrel 10, FIG. 10 is a cross-sectional view taken along line XX of FIG. 6, FIG. 11 is a cross-sectional view taken along line YY of FIG. 13 is a cross-sectional perspective view of the right side portion of the lens barrel 10, FIG. 14 is a cross-sectional view of the first lens barrel divided body 1202, and FIG. 15 is a cross-sectional view of the second lens barrel divided body 1204. 16 is a perspective view of the zoom movable lens group 18 and the focus movable lens group 20, and FIG. 17 is a cross-sectional perspective view of the main part of the second barrel segment 1204.

図６乃至図９に示すように、レンズ鏡筒１０は、鏡筒１２と、対物レンズ１４と、撮像素子１２８と、光学系１０４とを含んで構成されている。
本実施例では、光学系１０４は、反射部材１６と、ズーム用可動レンズ群１８と、フォーカス用可動レンズ群２０と、第１の固定レンズ群２２と、第２の固定レンズ群２４と、第３の固定レンズ群２６と、ズーム用可動レンズ群１８用の案内機構２８と、フォーカス用可動レンズ群２０用の案内機構３０とを備えている。
さらに、ズーム用可動レンズ群１８を移動させる駆動手段３２と、フォーカス用可動レンズ群２０を移動させる駆動手段３４とが設けられている。 As shown in FIGS. 6 to 9, the lens barrel 10 includes a lens barrel 12, an objective lens 14, an image sensor 128, and an optical system 104.
In this embodiment, the optical system 104 includes a reflecting member 16, a zoom movable lens group 18, a focus movable lens group 20, a first fixed lens group 22, a second fixed lens group 24, and a first fixed lens group 24. 3 fixed lens groups 26, a guide mechanism 28 for the zoom movable lens group 18, and a guide mechanism 30 for the focus movable lens group 20.
Further, driving means 32 for moving the zoom movable lens group 18 and driving means 34 for moving the focus movable lens group 20 are provided.

図６、図７に示すように、鏡筒１２は、全体として幅および長さ並びに厚さを有する平板形状を呈しており、対物レンズ１４と撮像素子１２８と光学系１０４とは鏡筒１２の幅方向の中央部で鏡筒１２の長さ方向に沿って並べられて配置されている。
鏡筒１２は、長さ方向において分割された第１鏡筒分割体１２０２および第２鏡筒分割体１２０４と、これら２つの鏡筒分割体１２０２，１２０４の間に挟まれる第３鏡筒分割体１２０６とで構成され、鏡筒１２の長手方向の一方の半部に第１鏡筒分割体１２０２が位置し、鏡筒１２の長手方向方の他方の半部に第２鏡筒分割体１２０４が位置し、これら第１鏡筒分割体１２０２および第２鏡筒分割体１２０４の間に第３鏡筒分割体１２０８が介在されている。
なお、本実施例では、図１に示すように、鏡筒１２の長さ方向が上下方向に向けて配置されることから、鏡筒１２の上部に第１鏡筒分割体１２０２が位置し、鏡筒１２の下部に第２鏡筒分割体１２０４が位置し、鏡筒１２の上下方向の中央部に第３鏡筒分割体１２０８が位置している。そして、撮像装置１００のケース１０２の前面に平行する鏡筒１２の厚さ方向の一方の面が鏡筒１２の前面となり、ケース１０２の後面に平行する他方の面が鏡筒１２の後面となり、鏡筒１２の幅方向の一方の面が左側面となり、他方の面が右側面となる。また、本実施例では、これら第１、第２、第３鏡筒分割体１２０２、１２０４、１２０６は合成樹脂材料によって形成されている。 As shown in FIGS. 6 and 7, the lens barrel 12 has a flat plate shape having a width, a length, and a thickness as a whole, and the objective lens 14, the imaging device 128, and the optical system 104 are included in the lens barrel 12. They are arranged along the length direction of the lens barrel 12 at the center in the width direction.
The lens barrel 12 includes a first lens barrel divided body 1202 and a second lens barrel divided body 1204 divided in the length direction, and a third lens barrel divided body sandwiched between the two lens barrel divided bodies 1202 and 1204. 1206, the first lens barrel divided body 1202 is located in one half of the lens barrel 12 in the longitudinal direction, and the second lens barrel divided body 1204 is located in the other half of the lens barrel 12 in the longitudinal direction. The third lens barrel divided body 1208 is interposed between the first lens barrel divided body 1202 and the second lens barrel divided body 1204.
In the present embodiment, as shown in FIG. 1, since the length direction of the lens barrel 12 is arranged in the vertical direction, the first lens barrel divided body 1202 is located on the upper portion of the lens barrel 12, The second lens barrel divided body 1204 is located at the lower part of the lens barrel 12, and the third lens barrel divided body 1208 is located at the center in the vertical direction of the lens barrel 12. Then, one surface in the thickness direction of the lens barrel 12 parallel to the front surface of the case 102 of the imaging device 100 is the front surface of the lens barrel 12, and the other surface parallel to the rear surface of the case 102 is the rear surface of the lens barrel 12. One surface in the width direction of the lens barrel 12 is a left side surface, and the other surface is a right side surface. In the present embodiment, the first, second, and third lens barrel divided bodies 1202, 1204, and 1206 are formed of a synthetic resin material.

図８、図１０乃至図１３に示すように、第１鏡筒分割体１２０２の内部には、断面が矩形で下面に開放状の部品収容空間１２０２Ａが設けられており、対物レンズ１４はその前面側にレンズ押え１４０２が位置し後面側に遮光枠１４０４が位置した状態で、第１鏡筒分割体１２０２の前面の上部でかつ幅方向の中央部に取着されている。
反射部材１６は、対物レンズ１４で捉えた像を下部に向けて（撮像素子１２８側に）反射させるもので本実施例ではプリズムが用いられている。反射部材１６は、部品収容空間１２０２Ａで対物レンズ１４に臨む箇所に配置されている。
第１の固定レンズ群２２とズーム用可動レンズ群１８とは、部品収容空間１２０２Ａ内で反射部材１６の下方に配置されている。
第１の固定レンズ群２２は、第１鏡筒分割体１２０２の取付部に組み込まれる第１の固定レンズ２２０２と、この第１の固定レンズ２２０２を前記取付部に固定させる押え部材（遮光枠を兼ねる）２２０４とで構成されている。 As shown in FIGS. 8 and 10 to 13, the first lens barrel divided body 1202 is provided with a component housing space 1202 A having a rectangular cross section and an open shape on the lower surface. With the lens presser 1402 positioned on the side and the light shielding frame 1404 positioned on the rear surface side, the lens holder 1402 is attached to the upper portion of the front surface of the first lens barrel divided body 1202 and the central portion in the width direction.
The reflecting member 16 reflects an image captured by the objective lens 14 downward (to the image sensor 128 side), and a prism is used in this embodiment. The reflecting member 16 is disposed at a location facing the objective lens 14 in the component housing space 1202A.
The first fixed lens group 22 and the zoom movable lens group 18 are disposed below the reflecting member 16 in the component housing space 1202A.
The first fixed lens group 22 includes a first fixed lens 2202 incorporated in the attachment portion of the first lens barrel divided body 1202 and a pressing member (a light-shielding frame) that fixes the first fixed lens 2202 to the attachment portion. 2204).

図８に示すように、ズーム用可動レンズ群１８は、第１のズームレンズ１８０２と、互いに貼り合わされた第２、第３のズームレンズ１８０４、１８０５と、これら第１、第２、第３のズームレンズ１８０２、１８０４、１８０５の外周部をカシメにより支持したズーム用レンズ枠１８０６とを有している。
図１４に示すように、鏡筒１２の厚さ方向の両端に位置する第１、第２、第３のズームレンズ１８０２、１８０４、１８０５の部分はそれぞれ切り取られ、これにより鏡筒１２の厚さ方向の端部に位置する第１、第２、第３のズームレンズ１８０２、１８０４、１８０５の両端には、鏡筒１２の前面および後面に平行して直線状に延在する縁部１８０８が設けられている。
ズーム用レンズ枠１８０６は、第１、第２、第３のズームレンズ１８０２、１８０４、１８０５の周囲に位置しこれら第１、第２、第３のズームレンズ１８０２、１８０４、１８０５を保持する保持部１８１０と、この保持部１８１０から部品収容空間１２０２Ａ内の幅方向に延在する延在部１８１２とを有している。
保持部１８１０には、第１、第２、第３のズームレンズ１８０２、１８０４、１８０５の縁部１８０８に対応して鏡筒１２の前面および後面に平行して延在する直線部１８１４がそれぞれ設けられている。
図１６に示すように、延在部１８１２には、ロッド挿通孔１８１４が設けられ、また、鏡筒１２の長手方向において互いに対向するフランジ１８１６、１８１６が設けられ、これらフランジ１８１６、１８１６には、図８に示すように、軸３６０２、３６０２を介して雌ねじ３６０４を有する雌ねじ部材３６が鏡筒１２の長手方向に移動不能に結合される。
また、延在部１８１２とは反対側に位置する保持部１８１０の箇所で部品収容空間１２０２Ａの隅部１２０２Ｂ（本実施例では左側面と後面とが交わる箇所）に位置する箇所に係合溝１８１８が形成されている。 As shown in FIG. 8, the zoom movable lens group 18 includes a first zoom lens 1802, second and third zoom lenses 1804 and 1805 bonded together, and the first, second, and third zoom lenses. And a zoom lens frame 1806 in which outer peripheral portions of the zoom lenses 1802, 1804, and 1805 are supported by caulking.
As shown in FIG. 14, the first, second, and third zoom lenses 1802, 1804, and 1805 located at both ends in the thickness direction of the lens barrel 12 are each cut off, whereby the thickness of the lens barrel 12 is obtained. Edges 1808 that extend linearly in parallel to the front and rear surfaces of the lens barrel 12 are provided at both ends of the first, second, and third zoom lenses 1802, 1804, and 1805 positioned at the end portions in the direction. It has been.
The zoom lens frame 1806 is positioned around the first, second, and third zoom lenses 1802, 1804, and 1805, and holds the first, second, and third zoom lenses 1802, 1804, and 1805. 1810 and an extending portion 1812 extending from the holding portion 1810 in the width direction in the component housing space 1202A.
The holding portion 1810 is provided with linear portions 1814 extending in parallel to the front and rear surfaces of the lens barrel 12 corresponding to the edge portions 1808 of the first, second, and third zoom lenses 1802, 1804, and 1805, respectively. It has been.
As shown in FIG. 16, the extending portion 1812 is provided with a rod insertion hole 1814, and flanges 1816 and 1816 facing each other in the longitudinal direction of the lens barrel 12 are provided, and these flanges 1816 and 1816 include As shown in FIG. 8, a female screw member 36 having a female screw 3604 is coupled through the shafts 3602 and 3602 so as not to move in the longitudinal direction of the lens barrel 12.
In addition, the engaging groove 1818 is located at a portion of the holding portion 1810 located on the side opposite to the extending portion 1812 and located at a corner portion 1202B of the component housing space 1202A (where the left side surface and the rear surface intersect in this embodiment). Is formed.

ロッド挿通孔１８１４には、第１鏡筒分割体１２０２の長さ方向に延在する金属製のメインガイド軸３８が滑動可能に挿通されている。このメインガイド軸３８はその長さ方向の両端が第１鏡筒分割体１２０２の上面を構成する壁部と、第３鏡筒分割体１２０６の壁部とで支持されている。メインガイド軸３８は第１、第２、第３のズームレンズ１８０２、１８０４、１８０５の光軸と平行して延在しており、本実施例では第１鏡筒分割体１２０２の長さ方向に延在している。したがって、メインガイド軸３８はズーム用可動レンズ群１８を該ズーム用可動レンズ群１８の光軸方向に案内している。
係合溝１８１８には、第１鏡筒分割体１２０２の長さ方向に延在するサブガイド軸４０が滑動可能に挿通されている。したがって、サブガイド軸４０はズーム用レンズ群１８がメインガイド軸３８の回りに回転することを阻止している。サブガイド軸４０は第１鏡筒分割体１２０２と一体に形成されており、したがって、合成樹脂製である。サブガイド軸４０は、詳細には、部品収容空間１２０２Ａの隅部１２０２Ｂから突出する脚部４００２と、この脚部４００２の先端に設けられた軸状部分４００４とで構成されている。サブガイド軸４０は第１、第２、第３のズームレンズ１８０２、１８０４、１８０５の光軸と平行して延在しており、本実施例では第１鏡筒分割体１２０２の長さ方向に延在している。
ズーム用可動レンズ群１８用の案内機構２８は、これらメインガイド軸３８とサブガイド軸４０によって構成されている。 A metal main guide shaft 38 extending in the length direction of the first lens barrel divided body 1202 is slidably inserted into the rod insertion hole 1814. Both ends of the main guide shaft 38 in the length direction are supported by a wall portion constituting the upper surface of the first barrel segment 1202 and a wall portion of the third barrel segment 1206. The main guide shaft 38 extends in parallel with the optical axes of the first, second, and third zoom lenses 1802, 1804, and 1805. In this embodiment, the main guide shaft 38 extends in the length direction of the first lens barrel divided body 1202. It is extended. Therefore, the main guide shaft 38 guides the zoom movable lens group 18 in the optical axis direction of the zoom movable lens group 18.
A sub guide shaft 40 extending in the length direction of the first lens barrel divided body 1202 is slidably inserted into the engagement groove 1818. Therefore, the sub guide shaft 40 prevents the zoom lens group 18 from rotating around the main guide shaft 38. The sub guide shaft 40 is formed integrally with the first lens barrel divided body 1202, and is therefore made of synthetic resin. Specifically, the sub guide shaft 40 includes a leg portion 4002 protruding from the corner portion 1202B of the component housing space 1202A, and a shaft-like portion 4004 provided at the tip of the leg portion 4002. The sub guide shaft 40 extends in parallel with the optical axes of the first, second, and third zoom lenses 1802, 1804, and 1805. In this embodiment, the sub guide shaft 40 extends in the length direction of the first barrel segment 1202. It is extended.
The guide mechanism 28 for the zoom movable lens group 18 includes the main guide shaft 38 and the sub guide shaft 40.

図８、図１６に示すように、ズーム用可動レンズ群１８を移動させる駆動手段３２は、鏡筒１２の長さ方向に延在するホルダ３２０２と、ホルダ３２０２の上部に設けられたモータ３２０４と、ホルダ３２０２に沿って延在しモータ３２０４により回転駆動される雄ねじ部材３２０６とを有している。
ホルダ３２０２は第１鏡筒分割体１２０２の右側面の欠部に取着され、これにより雄ねじ部材３２０６が部品収容空間１２０２Ａに位置し、モータ３２０４は第１鏡筒分割体１２０２の上面に位置する。
雄ねじ部材３２０６は雌ねじ部材３６の雌ねじ３６０４に螺合され、したがってモータ３２０４の正逆転によりズーム用可動レンズ群１８はメインガイド軸３８およびサブガイド軸４０に案内されつつそれらの光軸方向に沿って往復移動される。
本実施例では、図１４に示すように、ズーム用可動レンズ群１８とメインガイド軸３８と雄ねじ部材３２０６とが第１鏡筒分割体１２０２の内部で第１鏡筒分割体１２０２の幅方向に並べられて配置され、サブガイド軸４０はメインガイド軸３８および雄ねじ部材３２０６とは反対側に位置するズーム用レンズ枠１８０６箇所に配置されることになる。 As shown in FIGS. 8 and 16, the driving means 32 for moving the zoom movable lens group 18 includes a holder 3202 extending in the length direction of the lens barrel 12, and a motor 3204 provided on the top of the holder 3202. And a male screw member 3206 that extends along the holder 3202 and is rotationally driven by a motor 3204.
The holder 3202 is attached to a notch on the right side surface of the first lens barrel divided body 1202, whereby the male screw member 3206 is located in the component housing space 1202 A, and the motor 3204 is located on the upper surface of the first lens barrel divided body 1202. .
The male screw member 3206 is screwed into the female screw 3604 of the female screw member 36. Therefore, the zoom movable lens group 18 is guided along the optical axis direction while being guided by the main guide shaft 38 and the sub guide shaft 40 by forward and reverse rotation of the motor 3204. It is reciprocated.
In the present embodiment, as shown in FIG. 14, the zoom movable lens group 18, the main guide shaft 38, and the male screw member 3206 are arranged in the width direction of the first barrel segment 1202 inside the first barrel segment 1202. The sub guide shafts 40 are arranged side by side, and are disposed at the zoom lens frame 1806 at the opposite side of the main guide shaft 38 and the male screw member 3206.

図８に示すように、第３鏡筒分割体１２０６は、部品収容空間１２０２Ａおよび第２鏡筒分割体１２０４の部品収容空間１２０４Ａに臨む内部部分１２０６Ａと、部品収容空間１２０２Ａ、１２０４Ａ外に位置する外部部分１２０６Ｂとを有している。
第２の固定レンズ群２４は、その光軸をズーム用可動レンズ群１８の光軸と一致させて内部部分１２０６Ａに取着され、また、第２固定レンズ群２４の後面にアイリス（絞り）４２が配置されている。このアイリス４２は、第３鏡筒分割体１２０６の外部部分１２０６Ｂに取着された駆動部４４により開閉される。
本実施例では、図１８に示すように、サブガイド軸４０は第１鏡筒分割体１２０２の下面よりも下方に突出され、より詳細には第１鏡筒分割体１２０２が第３鏡筒分割体１２０６に合わされる合わせ面よりも下方に突出され、このサブガイド軸４０の突出部分４０Ａが、第３鏡筒分割体１２０６の合わせ面の孔１２０６Ａに嵌合されることで第１鏡筒分割体１２０２と第３鏡筒分割体１２０６との位置決めがなされている。 As shown in FIG. 8, the third barrel segment 1206 is located outside the component housing space 1202A and the inner portion 1206A facing the component housing space 1204A of the second barrel segment 1204, and the component housing spaces 1202A and 1204A. And an external portion 1206B.
The second fixed lens group 24 is attached to the internal portion 1206A with its optical axis coinciding with the optical axis of the zoom movable lens group 18, and an iris 42 on the rear surface of the second fixed lens group 24. Is arranged. The iris 42 is opened and closed by a drive unit 44 attached to the outer portion 1206B of the third barrel segment 1206.
In this embodiment, as shown in FIG. 18, the sub guide shaft 40 protrudes below the lower surface of the first lens barrel divided body 1202, and more specifically, the first lens barrel divided body 1202 is divided into the third lens barrel divided. The projection part 40A of the sub guide shaft 40 protrudes downward from the mating surface to be fitted to the body 1206, and is fitted into the hole 1206A of the mating face of the third lens barrel split body 1206 so that the first lens barrel splitting is performed. The body 1202 and the third lens barrel divided body 1206 are positioned.

第２鏡筒分割体１２０４の内部には、本実施例では、上下に開放された断面が矩形の部品収容空間１２０４Ａが形成されており、第２鏡筒分割体１２０４の下部に撮像素子取付板４６が取着されることでこの部品収容空間１２０４Ａの下端は閉塞されている。したがって、本実施例では、第２鏡筒分割体１２０４は撮像素子取付板４６を含んで構成されている。フォーカス用可動レンズ群２０と第３の固定レンズ群２６は、部品収容空間１２０４Ａ内で第２鏡筒分割体１２０４の幅方向中央に位置する箇所に配置されている。
なお、図９に示すように、第２鏡筒分割体１２０４の右側面には、上壁１２０５（特許請求の範囲の壁部に相当）を残して欠部１２０４Ｅが形成され、この欠部１２０４Ｅはホルダ３４０２を取付けるためのものであり、欠部１２０４Ｅは上壁１４０５の下方に延在形成され、第２鏡筒分割体１２０４の右側面は、欠部１２０４Ｅを介して部品収容空間１２０４Ａに連通している。また、図１９に示すように、後述する雌ねじ部材４８をフォーカス用レンズ枠２００６に着脱するための開口１２１０が第２鏡筒分割体１２０４の欠部１２０４Ｅ寄りの前面箇所に設けられ、前記前面箇所は開口１２１０を介して部品収容空間１２０４Ａに連通している。 In the present embodiment, a component housing space 1204 A having a rectangular cross section opened up and down is formed inside the second barrel segment 1204, and an image sensor mounting plate is formed below the second barrel segment 1204. 46 is attached, the lower end of the component housing space 1204A is closed. Therefore, in the present embodiment, the second lens barrel divided body 1204 is configured to include the image sensor mounting plate 46. The focus movable lens group 20 and the third fixed lens group 26 are disposed at a position located in the center in the width direction of the second barrel segment 1204 in the component housing space 1204A.
As shown in FIG. 9, a notch 1204E is formed on the right side surface of the second barrel segment 1204, leaving an upper wall 1205 (corresponding to a wall in the claims), and this notch 1204E. Is for attaching the holder 3402. The notch 1204E extends below the upper wall 1405, and the right side surface of the second barrel segment 1204 communicates with the component housing space 1204A via the notch 1204E. doing. Further, as shown in FIG. 19, an opening 1210 for attaching and detaching a female screw member 48 to be described later to / from the focusing lens frame 2006 is provided at a front portion near the notch 1204E of the second barrel segment 1204, and the front portion Is communicated with the component housing space 1204A through the opening 1210.

フォーカス用可動レンズ群２０は、互いに貼り合わされた第１、第２のフォーカスレンズ２００２、２００４と、これら第１、第２のフォーカスレンズ２００２、２００４を支持するフォーカス用レンズ枠２００６とを有している。
図１５に示すように、鏡筒１２の厚さ方向の両端に位置する第１、第２のフォーカスレンズ２００２、２００４の部分はそれぞれ切り取られ、これにより鏡筒１２の厚さ方向の端部に位置する第１、第２のフォーカスレンズ２００２、２００４の両端には、鏡筒１２の前面および後面に平行して直線状に延在する縁部２００８が設けられている。
フォーカス用レンズ枠２００６は、第１、第２のフォーカスレンズ２００２、２００４の周囲に位置しこれら第１、第２のフォーカスレンズ２００２、２００４を保持する保持部２０１０と、この保持部２０１０から部品収容空間１２０４Ａ内の幅方向に延在する延在部２０１２とを有している。
保持部２０１０には、第１、第２のフォーカスレンズ２００２、２００４の縁部２００８に対応して鏡筒１２の前面および後面に平行して延在する直線部２０１４がそれぞれ設けられている。
また、図１５に示すように、延在部２０１２とは反対側に位置する保持部２０１０の箇所で部品収容空間１２０４Ａの隅部１４０２Ｂ（本実施例では左側面と後面とが交わる箇所）に位置する箇所に係合溝２０１８が形成されている。 The focus movable lens group 20 includes first and second focus lenses 2002 and 2004 that are bonded to each other, and a focus lens frame 2006 that supports the first and second focus lenses 2002 and 2004. Yes.
As shown in FIG. 15, the first and second focus lenses 2002 and 2004 located at both ends of the lens barrel 12 in the thickness direction are respectively cut off, so that the lens barrel 12 has end portions in the thickness direction. At both ends of the first and second focus lenses 2002 and 2004 that are positioned, edges 2008 that extend linearly in parallel to the front and rear surfaces of the lens barrel 12 are provided.
A focus lens frame 2006 is positioned around the first and second focus lenses 2002 and 2004, holds a first holding lens 2010, and a second holding lens 2010. The holding unit 2010 accommodates components. And an extension part 2012 extending in the width direction in the space 1204A.
The holding portion 2010 is provided with linear portions 2014 that extend in parallel with the front and rear surfaces of the lens barrel 12 corresponding to the edges 2008 of the first and second focus lenses 2002 and 2004, respectively.
Further, as shown in FIG. 15, the holding portion 2010 is located on the opposite side of the extension portion 2012 and is located at the corner 1402B of the component housing space 1204A (in this embodiment, the left side and the rear side intersect). An engagement groove 2018 is formed at a place to be performed.

図１５に示すように、延在部２０１２にはロッド挿通孔２０１４が設けられ、ロッド挿通孔２０１４には、第２鏡筒分割体１２０４の長さ方向に延在する金属製のメインガイド軸５０が滑動可能に挿通されている。このメインガイド軸５０はその長さ方向の両端が第３鏡筒分割体１２０６の壁部と、第２鏡筒分割体１２０４の下部に設けられた壁部とで支持されている。メインガイド軸５０は第１、第２のフォーカスレンズ２００２、２００４の光軸と平行して延在しており、本実施例では第２鏡筒分割体１２０４の長さ方向に延在している。したがって、メインガイド軸５０はフォーカス用可動レンズ群２０を該フォーカス用可動レンズ群２８の光軸方向に案内している。
係合溝２０１８には、第２鏡筒分割体１２０４の長さ方向に延在するサブガイド軸５２が滑動可能に挿通されている。したがって、サブガイド軸５２はフォーカス用レンズ群２０がメインガイド軸５０の回りに回転することを阻止している。サブガイド軸５２は第２鏡筒分割体１２０４と一体に形成されており、したがって、合成樹脂製である。サブガイド軸５２は、詳細には、部品収容空間１２０４Ａの隅部から突出する脚部５２０２と、この脚部５２０２の先端に設けられた軸状部分５２０４とで構成されている。サブガイド軸５２は第１、第２のフォーカスレンズ２００２、２００４の光軸と平行して延在しており、本実施例では第２鏡筒分割体１２０４の長さ方向に延在している。
フォーカス用可動レンズ群２０用の案内機構３０は、これらメインガイド軸３８とサブガイド軸４０によって構成されている。
なお、本実施の形態では、図１８に示すように、サブガイド軸５２は第２鏡筒分割体１２０４の上面よりも上方に突出され、より詳細には第２鏡筒分割体１２０４が第３鏡筒分割体１２０６に合わされる合わせ面よりも上方に突出され、このサブガイド軸５２の突出部分５２Ａが、第３鏡筒分割体１２０６の合わせ面の孔１２０６Ｂに嵌合されることで第２鏡筒分割体１２０４と第３鏡筒分割体１２０６の位置決めがなされている。 As shown in FIG. 15, a rod insertion hole 2014 is provided in the extending portion 2012, and the metal main guide shaft 50 extending in the length direction of the second lens barrel divided body 1204 is provided in the rod insertion hole 2014. Is slidably inserted. Both ends of the main guide shaft 50 in the length direction are supported by a wall portion of the third lens barrel divided body 1206 and a wall portion provided at a lower portion of the second lens barrel divided body 1204. The main guide shaft 50 extends in parallel with the optical axes of the first and second focus lenses 2002 and 2004, and extends in the length direction of the second barrel segment 1204 in this embodiment. . Therefore, the main guide shaft 50 guides the focus movable lens group 20 in the optical axis direction of the focus movable lens group 28.
A sub guide shaft 52 extending in the length direction of the second lens barrel divided body 1204 is slidably inserted into the engagement groove 2018. Therefore, the sub guide shaft 52 prevents the focusing lens group 20 from rotating around the main guide shaft 50. The sub guide shaft 52 is formed integrally with the second lens barrel divided body 1204 and is therefore made of synthetic resin. Specifically, the sub-guide shaft 52 includes a leg portion 5202 that protrudes from a corner of the component housing space 1204 A, and a shaft-like portion 5204 provided at the tip of the leg portion 5202. The sub guide shaft 52 extends in parallel with the optical axes of the first and second focus lenses 2002 and 2004, and extends in the length direction of the second barrel segment 1204 in this embodiment. .
The guide mechanism 30 for the focus movable lens group 20 includes the main guide shaft 38 and the sub guide shaft 40.
In the present embodiment, as shown in FIG. 18, the sub guide shaft 52 protrudes upward from the upper surface of the second lens barrel divided body 1204. More specifically, the second lens barrel divided body 1204 has a third shape. It protrudes above the mating surface to be fitted to the lens barrel divided body 1206, and the projecting portion 52A of the sub-guide shaft 52 is fitted into the hole 1206B on the mating surface of the third lens barrel divided body 1206, so that the second. The lens barrel divided body 1204 and the third lens barrel divided body 1206 are positioned.

また、図１６に示すように、延在部２０１２には、鏡筒１２の長手方向において互いに対向する第１フランジ２０１６、第２フランジ２０１７が設けられ、これら第１、第２フランジ２０１６、２０１７には、図９、図２２に示すように、雌ねじ部材４８が鏡筒１２の長手方向に移動不能に結合される。
図１９は雌ねじ部材４８の斜視図、図２０（Ａ）は雌ねじ部材４８の正面図、（Ｂ）は（Ａ）のＢ矢視図、（Ｃ）は（Ａ）のＣ矢視図、（Ｄ）は（Ａ）のＤ矢視図、（Ｅ）は（Ａ）のＥ矢視図である。
図１９、図２０に示すように、雌ねじ部材４８は、その一側に二股部４８０２が設けられ、他側に雌ねじ４８０４が設けられており、二股部４８０２の外側にそれぞれ同軸状に第１軸４８１０と第２軸４８１２が設けられている。
雌ねじ４８０４は一側が開放状に形成されており、雄ねじ部材３４０６はこの開放された部分から雌ねじ４８０４に螺合される。
第１軸４８１０は二股部４８０２から突設された円錐面を有する円錐部４８１１と、この円錐部４８１１の先端に設けられた均一外径の軸部４８０６とで構成されている。
第２軸４８１２は、二股部４８０２から突設され断面が細長形状を呈する細長部４８１３と、この細長部４８１３の先端に設けられ断面が先端にいくにつれて縮小する傾斜部４８０８と、傾斜部４８０８の先端に設けられた断面が細長形状を呈する軸部４８１４とで構成されている。
細長部４８１３の長手方向の両端は円筒面からなる円筒状側面４８１６で形成され、前記細長部の長手方向と直交する両端は平坦な平坦面状側面４８１８で形成されている。
一方、図２１に示すように、フォーカス用レンズ枠２００６の第１フランジ２０１６には、第１軸４８１０が支持される均一内径の軸受孔２０１６Ａが設けられ、この軸受孔２０１６Ａの内径は第１軸４８１０の軸部４８０８が収容できる寸法で形成されている。
図２１、図２２に示すように、フォーカス用レンズ枠２００６の第２フランジ２０１７には、第２軸４８１２が支持される細長形状の軸受孔２０１７Ａが設けられ、この軸受孔２０１７Ａは、該軸受孔２０１７Ａの長手方向と第２軸４８１２の細長部４８１３の長手方向が一致した状態で該細長部４８１３を収容できる寸法で形成されている。
図２２に示すように、第２フランジ２０１７の軸受孔２０１７Ａはその長手方向が、開口１２１０から挿入した状態の雌ねじ部材４８の第２軸４８１２の細長部４８１３の長手方向と一致するように形成されている。 As shown in FIG. 16, the extended portion 2012 is provided with a first flange 2016 and a second flange 2017 that are opposed to each other in the longitudinal direction of the lens barrel 12, and the first and second flanges 2016 and 2017 are provided on the extended portion 2012. 9 and FIG. 22, the female screw member 48 is coupled so as not to move in the longitudinal direction of the lens barrel 12.
19 is a perspective view of the female screw member 48, FIG. 20A is a front view of the female screw member 48, FIG. 19B is a view taken along the arrow B in FIG. (D) is a view on arrow D of (A), and (E) is a view on arrow E of (A).
As shown in FIGS. 19 and 20, the female screw member 48 is provided with a bifurcated portion 4802 on one side and a female screw 4804 on the other side. The first shaft is coaxially formed on the outer side of the bifurcated portion 4802. 4810 and a second shaft 4812 are provided.
One side of the female screw 4804 is formed in an open shape, and the male screw member 3406 is screwed into the female screw 4804 from this opened portion.
The first shaft 4810 includes a conical portion 4811 having a conical surface protruding from the bifurcated portion 4802 and a shaft portion 4806 having a uniform outer diameter provided at the tip of the conical portion 4811.
The second shaft 4812 has an elongated portion 4813 that protrudes from the bifurcated portion 4802 and has an elongated cross section, an inclined portion 4808 that is provided at the distal end of the elongated portion 4813 and decreases as the cross section goes to the distal end, and an inclined portion 4808. The cross section provided at the tip is composed of a shaft portion 4814 having an elongated shape.
Both ends of the elongated portion 4813 in the longitudinal direction are formed by cylindrical side surfaces 4816 made of a cylindrical surface, and both ends orthogonal to the longitudinal direction of the elongated portion are formed by flat flat surface-like side surfaces 4818.
On the other hand, as shown in FIG. 21, the first flange 2016 of the focusing lens frame 2006 is provided with a bearing hole 2016A having a uniform inner diameter that supports the first shaft 4810. The inner diameter of the bearing hole 2016A is the first shaft. The shaft portion 4808 of 4810 is formed with a size that can be accommodated.
As shown in FIGS. 21 and 22, the second flange 2017 of the focusing lens frame 2006 is provided with an elongated bearing hole 2017A for supporting the second shaft 4812, and the bearing hole 2017A includes the bearing hole 2017A. It is formed in a dimension that can accommodate the elongated portion 4813 in a state where the longitudinal direction of 2017A and the longitudinal direction of the elongated portion 4813 of the second shaft 4812 coincide.
As shown in FIG. 22, the bearing hole 2017A of the second flange 2017 is formed so that its longitudinal direction coincides with the longitudinal direction of the elongated portion 4813 of the second shaft 4812 of the female screw member 48 inserted from the opening 1210. ing.

フォーカス用可動レンズ群２０を移動させる駆動手段３４は、鏡筒１２の長さ方向に延在するホルダ３４０２と、ホルダ３４０２の下部に支持されたモータ３４０４と、ホルダ３４０２に沿って延在しその基部がモータ３４０４に連結され該モータ３４０４により回転駆動される雄ねじ部材３４０６と、上述した雌ねじ部材４８とを備え、ホルダ３４０２は、雄ねじ部材３４０６に沿って延在する本体板部３４０７と、本体板部３４０７の先端に設けられ雄ねじ部材３４０６の先端を支持する支持板３４０８を有している。
雌ねじ部材４８はフォーカス用レンズ枠２００６に連結され、雄ねじ部材３４０６は雌ねじ部材４８の雌ねじ４８０４に螺合され、したがってモータ３４０４の正逆転によりフォーカス用可動レンズ群２０はメインガイド軸５０およびサブガイド軸５２に案内されつつそれらの光軸方向に沿って往復移動される。
したがって、本実施例では、フォーカス用可動レンズ群２０とメインガイド軸５０と雄ねじ部材３４０４とが第２鏡筒分割体１２０４の部品収容空間１２０４Ａ内で第２鏡筒分割体１２０４の幅方向に並べられて配置され、サブガイド軸５２はメインガイド軸５０および雄ねじ部材３０６とは反対側に位置するフォーカス用レンズ枠２００６箇所に配置されることになる。
第３の固定レンズ群２６は、フォーカス用可動レンズ群２０の下方の部品収容空間１２０４Ａ箇所に配置され、第２鏡筒分割体１２０４の取付部に組み込まれる第３の固定レンズ２６０２と、この第３の固定レンズ２６０２を前記取付部に固定させる押え部材２６０４とで構成されている。 The driving means 34 for moving the focus movable lens group 20 includes a holder 3402 extending in the length direction of the lens barrel 12, a motor 3404 supported at the lower part of the holder 3402, and extending along the holder 3402. The base includes a male screw member 3406 that is coupled to the motor 3404 and is rotationally driven by the motor 3404, and the female screw member 48 described above. The holder 3402 includes a main body plate portion 3407 extending along the male screw member 3406, and a main body plate. A support plate 3408 is provided at the tip of the portion 3407 and supports the tip of the male screw member 3406.
The female screw member 48 is connected to the focusing lens frame 2006, and the male screw member 3406 is screwed into the female screw 4804 of the female screw member 48. Therefore, the movable lens group 20 for focusing is moved to the main guide shaft 50 and the sub guide shaft by forward and reverse rotation of the motor 3404. While being guided by 52, it is reciprocated along their optical axis directions.
Therefore, in the present embodiment, the focus movable lens group 20, the main guide shaft 50, and the male screw member 3404 are arranged in the width direction of the second barrel segment 1204 in the component housing space 1204 A of the second barrel segment 1204. Thus, the sub guide shaft 52 is disposed at the focus lens frame 2006 located on the opposite side of the main guide shaft 50 and the male screw member 306.
The third fixed lens group 26 is disposed in a part accommodating space 1204A below the focus movable lens group 20, and is connected to the third fixed lens 2602 incorporated in the mounting portion of the second barrel segment 1204. 3 and a pressing member 2604 for fixing the fixed lens 2602 to the mounting portion.

撮像素子取付板４６は、部品収容空間１２０４Ａの下端を閉塞するように第２鏡筒分割体１２０４の下部にねじ２０６、２０６によって取着されている。
撮像素子１２８は、撮像素子取付板４６が部品収容空間１２０４Ａに臨む内面に配置されている。
本実施例では撮像素子取付板４６に矩形の窓４６０２が設けられ、この窓４６０２に撮像素子１２８が嵌め込まれて配置され、撮像素子取付板４６の内面で撮像素子１２８の上面にシールガラス４６０４、シールゴム４６０６およびローパスフィルタ４６０８が配置され、押さえ板４６１０によって固定されている。 The image sensor mounting plate 46 is attached to the lower portion of the second barrel segment 1204 by screws 206 and 206 so as to close the lower end of the component housing space 1204A.
The image sensor 128 is disposed on the inner surface of the image sensor mounting plate 46 facing the component housing space 1204A.
In this embodiment, a rectangular window 4602 is provided on the image sensor mounting plate 46, and the image sensor 128 is fitted into the window 4602. The seal glass 4604 is disposed on the upper surface of the image sensor 128 on the inner surface of the image sensor mounting plate 46. A seal rubber 4606 and a low-pass filter 4608 are arranged and fixed by a pressing plate 4610.

なお、図１１、図１２、図１３、図１７に示すように、部品収容空間１２０４Ａに臨む第２鏡筒分割体１２０４の後面箇所で第２鏡筒分割体１２０４の上端と第２の固定レンズ群２４との間の箇所には凹凸部１２０４Ｃが設けられている。
また、部品収容空間１２０４Ａに臨む第２鏡筒分割体１２０４の後面箇所で第３の固定レンズ群２６と撮像素子１２８との間の箇所には凹凸部１２０４Ｄが設けられている。
これらの凹凸部１２０４Ｃ、１２０４Ｄは、対物レンズ１４、反射部材１６、第１の固定レンズ群２２、ズーム用可動レンズ群１８、第２固定レンズ群２４、フォーカス用可動レンズ群２０を介して進入してきた光のうち、部品収容空間１２０４Ａに臨む第２鏡筒分割体１２０４の後面箇所に到達した光が該後面箇所で反射されることで、いわゆるフレアあるいはゴーストと呼ばれる反射光が発生し、この反射光が撮像素子１２８の受光面に到達して撮像素子１２８の撮像信号に対して悪影響を及ぼすことを防止するために設けられている。特に、太陽などのように対物レンズ１４の光軸に対して斜め上方から入射する光源がある場合、その光源からの光線が上述した経路により第２鏡筒分割体１２０４の前記後面箇所に至るケースが多い。
なお、撮像素子１２８から遠い箇所に設けられた凹凸部１２０４Ｃの凹凸の間隔に対して撮像素子１２８から近い箇所に設けられた凹凸部１２０４Ｄの凹凸の間隔が大きく形成されている。これは、凹凸部１２０４Ｃに当たる前記光の角度に対して凹凸部１２０４Ｄに当たる前記光の角度がより小さいためであり、このように凹凸部１２０４Ｃ、１２０４Ｄの凹凸の間隔を変えることで、第２鏡筒分割体１２０４の成形時に金型からの取り外し性が向上される利点がある。 11, 12, 13, and 17, the upper end of the second barrel segment 1204 and the second fixed lens at the rear surface portion of the second barrel segment 1204 facing the component housing space 1204 A. An uneven portion 1204 C is provided at a location between the groups 24.
In addition, an uneven portion 1204D is provided at a location between the third fixed lens group 26 and the image sensor 128 at a location on the rear surface of the second barrel segment 1204 facing the component housing space 1204A.
These concave and convex portions 1204C and 1204D enter through the objective lens 14, the reflecting member 16, the first fixed lens group 22, the zoom movable lens group 18, the second fixed lens group 24, and the focus movable lens group 20. Of the received light, the light that has reached the rear surface portion of the second barrel segment 1204 facing the component housing space 1204A is reflected by the rear surface portion, so that reflected light called so-called flare or ghost is generated. It is provided to prevent light from reaching the light receiving surface of the image sensor 128 and adversely affecting the image signal of the image sensor 128. In particular, when there is a light source that is obliquely incident on the optical axis of the objective lens 14 such as the sun, the light beam from the light source reaches the rear surface portion of the second barrel segment 1204 through the above-described path. There are many.
Note that the unevenness interval of the uneven portion 1204D provided near the image sensor 128 is formed larger than the unevenness interval of the uneven portion 1204C provided at a location far from the image sensor 128. This is because the angle of the light striking the concave and convex portion 1204D is smaller than the angle of the light striking the concave and convex portion 1204C, and thus the second lens barrel can be obtained by changing the spacing of the concave and convex portions of the concave and convex portions 1204C and 1204D. There is an advantage that the detachability from the mold is improved when the divided body 1204 is molded.

第１鏡筒分割体１２０２と第３鏡筒分割体１２０６とは図１４に示すように、駆動部４４近傍の箇所でねじ２０２により取着され、第２鏡筒分割体１２０４と第３鏡筒分割体１２０６とは図９に示すように、右側面寄りの箇所で雄ねじ２０４により取着されている。
本実施例では、第２鏡筒分割体１２０４と第３鏡筒分割体１２０６との取着に本発明が適用され、本実施例では、第２鏡筒分割体１２０４が特許請求の範囲の第１の鏡筒分割体に相当し、また、第３鏡筒分割体１２０６が特許請求の範囲の第２の鏡筒分割体に相当している。
そして、本実施例では、雌ねじ部材４８と支持板３４０８と雄ねじ２０４とは、図１５に示すように光学系１０４の光軸方向と平行する方向から見て雄ねじ２０４の頭部２０４Ａの輪郭と雌ねじ部材４８の輪郭とが重複し、かつ、雄ねじ２０４の頭部２０４の輪郭が支持板３４０８の輪郭の外側に位置するように配置されている。 As shown in FIG. 14, the first lens barrel divided body 1202 and the third lens barrel divided body 1206 are attached by screws 202 at locations near the drive unit 44, and the second lens barrel divided body 1204 and the third lens barrel. As shown in FIG. 9, the divided body 1206 is attached by a male screw 204 at a location near the right side surface.
In the present embodiment, the present invention is applied to the attachment of the second lens barrel divided body 1204 and the third lens barrel divided body 1206, and in the present embodiment, the second lens barrel divided body 1204 is the first of the claims. The third lens barrel divided body 1206 corresponds to the first lens barrel divided body, and the third lens barrel divided body 1206 corresponds to the second lens barrel divided body in the claims.
In this embodiment, the female screw member 48, the support plate 3408, and the male screw 204 are composed of the outline of the head 204A of the male screw 204 and the female screw as viewed from the direction parallel to the optical axis direction of the optical system 104 as shown in FIG. The contour of the member 48 overlaps with the contour of the head 204 of the male screw 204 and is positioned outside the contour of the support plate 3408.

次に、実施例１による鏡筒分割体の取付構造について説明する。
まず、図１０に示すように、第２鏡筒分割体１２０４と第３鏡筒分割体１２０６とを、部品収容空間１２０４Ａ内で第２鏡筒分割体１２０４側から挿通された雄ねじ２０４により、詳細には部品収容空間１２０４Ａ内で上壁１２０５を挿通して第３鏡筒分割体１２０６に挿通された雄ねじ２０４により締結する。本実施例では、この雄ねじ２０４は第３鏡筒分割体１２０６を挿通して第１鏡筒分割体１２０２に締結され、したがって、雄ねじ２０４により第２鏡筒分割体１２０４とともに第３鏡筒分割体１２０６が第１鏡筒分割体１２０２に締結される。このような雄ねじ２０４の配設により、部品収容空間１２０４Ａ内で上壁１２０５の下面１２０５Ａには雄ねじ２０４の頭部２０４Ａが位置する。
次に、図２３に示すように、第２鏡筒分割体１２０４の開口１２１０から雌ねじ部材４８を挿入し、雌ねじ部材４８の第２軸４８１２を第２フランジ２０１７の軸受孔２０１７Ａに挿入する。この場合、軸受孔２０１７Ａの長手方向が一致された状態となっているため、第２軸４８１２の細長部４８１３は軸受孔２０１７Ａに収容される。
この状態で、図２４に示すように、雌ねじ部材４８を第１、第２フランジ２０１６、２０１７の間に押込み、第１軸４８１０を第１フランジ２０１６の軸受孔２０１６Ａに臨ませる。 Next, the mounting structure of the lens barrel divided body according to the first embodiment will be described.
First, as shown in FIG. 10, the second lens barrel divided body 1204 and the third lens barrel divided body 1206 are detailed by a male screw 204 inserted from the second lens barrel divided body 1204 side in the component housing space 1204A. Are fastened by the male screw 204 inserted through the third barrel segment 1206 through the upper wall 1205 in the component housing space 1204A. In the present embodiment, the male screw 204 is inserted into the third lens barrel divided body 1206 and fastened to the first lens barrel divided body 1202, and accordingly, the third lens barrel divided body together with the second lens barrel divided body 1204 by the male screw 204. 1206 is fastened to the first barrel segment 1202. With such an arrangement of the male screw 204, the head portion 204A of the male screw 204 is positioned on the lower surface 1205A of the upper wall 1205 in the component housing space 1204A.
Next, as shown in FIG. 23, the female screw member 48 is inserted from the opening 1210 of the second barrel segment 1204, and the second shaft 4812 of the female screw member 48 is inserted into the bearing hole 2017 A of the second flange 2017. In this case, since the longitudinal direction of the bearing hole 2017A is aligned, the elongated portion 4813 of the second shaft 4812 is accommodated in the bearing hole 2017A.
In this state, as shown in FIG. 24, the female screw member 48 is pushed between the first and second flanges 2016 and 2017 so that the first shaft 4810 faces the bearing hole 2016A of the first flange 2016.

次いで、図２５に示すように、雌ねじ部材４８を上方に動かし第１軸４８１０の軸部４８０６を第１フランジ２０１６の軸受孔２０１６Ａに挿入させる。この際、第２軸４８１２の傾斜部４８０８と第２フランジ２０１７の軸受孔２０１７Ａの縁部との間には隙間が形成されている。
次に、図２６に示すように、雌ねじ部材４８を上方に位置させた状態で、雌ねじ部材４８を第１、第２軸４８１０、４８１２を中心に９０度揺動させ、雌ねじ部材４８の雌ねじ４８０４を第２鏡筒分割体１２０４の欠部１２０４Ｅの外方に向ける。
すると、第２軸４８１２の細長部４８１３の長手方向と軸受孔２０１７Ａの長手方向が直交し、第２軸４８１２の傾斜部４８０８が第２フランジ２０１７の軸受孔２０１７Ａの長手方向と直交する２つの縁部に当て付けられた状態となり、これにより雌ねじ部材４８の第１、第２軸４８１０、４８１２の軸線方向の位置が保持される。したがって、第１軸４８１０の軸部４８０６が第１フランジ２０１６の軸受孔２０１６Ａに支持され、かつ、第２軸４８１２の軸部４８１４が第２フランジ２０１７の軸受孔２０１７Ａに支持された状態が保持される。これにより、雌ねじ部材４８の姿勢が安定し、後述する雌ねじ４８０４への雄ねじ部材３４０６の螺合が容易となる。 Next, as shown in FIG. 25, the female screw member 48 is moved upward to insert the shaft portion 4806 of the first shaft 4810 into the bearing hole 2016 A of the first flange 2016. At this time, a gap is formed between the inclined portion 4808 of the second shaft 4812 and the edge of the bearing hole 2017A of the second flange 2017.
Next, as shown in FIG. 26, with the female screw member 48 positioned upward, the female screw member 48 is swung 90 degrees about the first and second shafts 4810 and 4812, and the female screw 4804 of the female screw member 48 is placed. Is directed outward of the notch 1204E of the second barrel segment 1204.
Then, the longitudinal direction of the elongated portion 4813 of the second shaft 4812 is orthogonal to the longitudinal direction of the bearing hole 2017A, and the inclined portion 4808 of the second shaft 4812 is two edges perpendicular to the longitudinal direction of the bearing hole 2017A of the second flange 2017. Thus, the positions of the first and second shafts 4810 and 4812 of the female screw member 48 in the axial direction are maintained. Accordingly, the state where the shaft portion 4806 of the first shaft 4810 is supported by the bearing hole 2016A of the first flange 2016 and the shaft portion 4814 of the second shaft 4812 is supported by the bearing hole 2017A of the second flange 2017 is maintained. The Thereby, the posture of the female screw member 48 is stabilized, and the male screw member 3406 can be easily screwed into the female screw 4804 described later.

次に、雄ねじ部材３４０６とモータ３４０４を支持したホルダ３４０２を、欠部１２０４Ｅから雄ねじ部材３４０６が部品収容空間１２０４Ａ内に挿入され雄ねじ部材３４０６が雌ねじ４８０４に螺合するように欠部１２０４Ｅに取着する。より詳細にはホルダ３４０２の本体板部３４０７を欠部１２０４Ｅの縁にねじ２０８で取着し、本体板部３４０７により欠部１２０４Ｅを閉塞する。
これにより雄ねじ部材３４０６が部品収容空間１２０４Ａ内で雌ねじ４８０４に螺合し、モータ３４０４は第２鏡筒分割体１２０４の下部に位置し、支持板３４０８は部品収容空間１２０４Ａ内で上壁１２０５の下面１２０５Ａの直下に位置する。
したがって、部品収容空間１２０４Ａ内で上壁１２０５の下面１２０５Ａには、第１乃至第３鏡筒分割体１２０２、１２０４、１２０６を締結する雄ねじ２０４の頭部２０４Ａと、ホルダ３４０２の支持板３４０８が位置し、また、フォーカス用可動レンズ群２０の光軸方向に沿った位置によっては雌ねじ部材４８も上壁１２０５の下面１２０５Ａの近傍に位置することになる。
なお、雄ねじ２０４により第２鏡筒分割体１２０４を第３鏡筒分割体１２０６および第１鏡筒分割体１２０２に締結する前に、雌ねじ部材４８をフォーカス用レンズ枠２０１６の第１、第２のフランジ２０１６、２０１７に取付けてもよく、この場合には、雄ねじ２０４により第２鏡筒分割体１２０４を第３鏡筒分割体１２０６および第１鏡筒分割体１２０２に締結する際に、雌ねじ部材４８を第１、第２軸４８１０、４８１２を中心として揺動させ、雌ねじ部材４８を開口１２１０内に退避させておけばよい。 Next, the holder 3402 supporting the male screw member 3406 and the motor 3404 is attached to the notch 1204E so that the male screw member 3406 is inserted into the component housing space 1204A from the notch 1204E and the male screw member 3406 is screwed into the female screw 4804. To do. More specifically, the main body plate portion 3407 of the holder 3402 is attached to the edge of the notch 1204E with the screws 208, and the main body plate portion 3407 closes the notch 1204E.
As a result, the male screw member 3406 is screwed into the female screw 4804 in the component housing space 1204A, the motor 3404 is positioned at the lower part of the second lens barrel divided body 1204, and the support plate 3408 is placed in the lower surface of the upper wall 1205 in the component housing space 1204A. Located just below 1205A.
Therefore, the head 204A of the male screw 204 that fastens the first to third lens barrel divided bodies 1202, 1204, and 1206 and the support plate 3408 of the holder 3402 are positioned on the lower surface 1205A of the upper wall 1205 in the component housing space 1204A. In addition, depending on the position along the optical axis direction of the focus movable lens group 20, the female screw member 48 is also positioned in the vicinity of the lower surface 1205 A of the upper wall 1205.
Before the second barrel segment 1204 is fastened to the third barrel segment 1206 and the first barrel segment 1202 by the male screw 204, the female screw member 48 is moved to the first and second focus lens frames 2016. It may be attached to the flanges 2016 and 2017. In this case, when the second barrel segment 1204 is fastened to the third barrel segment 1206 and the first barrel segment 1202 by the male screw 204, the female screw member 48 is used. Is pivoted about the first and second shafts 4810 and 4812, and the female screw member 48 is retracted into the opening 1210.

次に作用効果について説明する。
部品収容空間１２０４Ａの上端に、すなわち上壁１２０５の下面１２０５Ａに、第１乃至第３鏡筒分割体１２０２、１２０４、１２０６を締結する雄ねじ２０４の頭部２０４Ａが位置し、ホルダ３４０２の支持板３４０８が位置する。
また、フォーカス用可動レンズ群３０に連結された雌ねじ部材４８が、その光軸方向に沿った位置によっては部品収容空間１２０４Ａ内で上壁１２０５の下面１２０５Ａに近接する。
一方、ホルダ３４０２の欠部１２０４Ｅから部品収容空間１２０４Ａへの装脱を円滑に行なえるように、図１０に示すように、支持板３４０８の上面と上壁１２０５の下面１２０５Ａとの間には隙間Ａを確保しておく必要がある。
また、フォーカス用可動レンズ群３０を移動させるために雌ねじ部材４８が支持板３４０８の下面に最も近接した位置を雌ねじ部材４８の上限位置とすると、部品収容空間１２０４Ａ内で上限位置に位置した雌ねじ部材４８と支持板３４０８の下面との間には、雌ねじ部材４８との衝突を防止するための空間を確保しておく必要がある。
したがって、上限位置に位置した雌ねじ部材４８と上壁１２０５の下面１２０５Ａとの間には、前記隙間Ａに前記空間の高さを加えた隙間Ｂが必然的に生まれ、部品収容空間１２０４Ａ内で雌ねじ部材４８の上方の隙間Ｂはデッドスペースとなる。
本実施例では、雌ねじ部材４８と支持板３４０８と雄ねじ２０４とは、図１５に示すように光学系１０４の光軸方向と平行する方向から見て雄ねじ２０４の頭部２０４Ａの輪郭と雌ねじ部材４８の輪郭とが重複し、かつ、雄ねじ２０４の頭部２０４の輪郭が支持板３４０８の輪郭の外側に位置するように配置されている。
したがって、本実施例によれば、デッドスペースである雌ねじ部材４８の上方の隙間Ｂを利用して、第１乃至第３鏡筒分割体１２０２、１２０４、１２０６を締結する雄ねじ２０４の頭部２０４Ａが支持板３４０８に干渉することなく部品収容空間１２０４Ａ内に配置されており、光軸方向に沿った部品収容空間１２０４Ａの長さおよび第２鏡筒分割体１２０４の長さを短縮し、これによりレンズ鏡筒をコンパクト化する上で有利となる。
また、雄ねじ２０４は部品収容空間１２０４Ａ内に配置されるので、第１乃至第３鏡筒分割体１２０２、１２０４、１２０６締結用の雄ねじ２０４を配設するにあたり、第１乃至第３鏡筒分割体１２０２、１２０４、１２０６に光軸方向と直交する方向に突出するフランジなどの突出部を設ける必要が無くなり、したがって、鏡筒の小型化を図る上で、また、鏡筒を撮像装置に組み込む際に鏡筒周囲に生じるデッドスペースを無くす上で有利となる。
また、本実施例では、雌ねじ部材４８をフォーカス用レンズ枠２００６に着脱可能に取着する構成としたため、雌ねじ部材４８の交換が必要となった際に、その交換作業を容易に行なうことができる。
また、本実施例では、第２鏡筒分割体１２０４に雌ねじ部材４８をフォーカス用レンズ枠２００６に着脱するための開口１２１０を設けたので、第２鏡筒分割体１２０４内にフォーカス用可動レンズ群２０や案内機構３０を組み込んだ後で、雌ねじ部材４８のフォーカス用レンズ枠２００６への取着を行なうことができる。したがって、第２鏡筒分割体１２０４にフォーカス用可動レンズ群２０、案内機構３０を組み込む際に、雌ねじ部材４８が作業の邪魔になることなく、組立作業の効率化を図る上で有利となる。 Next, the function and effect will be described.
The head 204A of the male screw 204 that fastens the first to third lens barrel divided bodies 1202, 1204, and 1206 is positioned at the upper end of the component housing space 1204A, that is, the lower surface 1205A of the upper wall 1205, and the support plate 3408 of the holder 3402 Is located.
Further, the female screw member 48 connected to the focus movable lens group 30 is close to the lower surface 1205A of the upper wall 1205 in the component housing space 1204A depending on the position along the optical axis direction.
On the other hand, as shown in FIG. 10, there is a gap between the upper surface of the support plate 3408 and the lower surface 1205A of the upper wall 1205 so that the part 1204E of the holder 3402 can be smoothly attached to and detached from the component housing space 1204A. It is necessary to secure A.
If the position where the female screw member 48 is closest to the lower surface of the support plate 3408 to move the focus movable lens group 30 is the upper limit position of the female screw member 48, the female screw member positioned at the upper limit position in the component housing space 1204A. Between 48 and the lower surface of the support plate 3408, it is necessary to secure a space for preventing a collision with the female screw member 48.
Therefore, a gap B is inevitably created between the female screw member 48 located at the upper limit position and the lower surface 1205A of the upper wall 1205, and the height of the space is added to the gap A, and the female screw is formed in the component housing space 1204A. The gap B above the member 48 becomes a dead space.
In this embodiment, the female screw member 48, the support plate 3408, and the male screw 204 are composed of the outline of the head 204A of the male screw 204 and the female screw member 48 as seen from the direction parallel to the optical axis direction of the optical system 104 as shown in FIG. The contour of the head 204 of the male screw 204 is disposed outside the contour of the support plate 3408.
Therefore, according to the present embodiment, the head 204A of the male screw 204 that fastens the first to third lens barrel divided bodies 1202, 1204, and 1206 using the gap B above the female screw member 48 that is a dead space is provided. It is arranged in the component housing space 1204A without interfering with the support plate 3408, and the length of the component housing space 1204A along the optical axis direction and the length of the second lens barrel divided body 1204 are shortened. This is advantageous in reducing the size of the lens barrel.
Further, since the male screw 204 is disposed in the component housing space 1204A, the first to third lens barrel divided bodies are provided when the male screws 204 for fastening the first to third lens barrel divided bodies 1202, 1204, and 1206 are disposed. 1202, 1204, and 1206 need not be provided with a protruding portion such as a flange that protrudes in a direction orthogonal to the optical axis direction. Therefore, in order to reduce the size of the lens barrel and to incorporate the lens barrel into the imaging device This is advantageous in eliminating dead space around the lens barrel.
In this embodiment, since the female screw member 48 is detachably attached to the focusing lens frame 2006, when the female screw member 48 needs to be replaced, the replacement work can be easily performed. .
In this embodiment, since the opening 1210 for attaching / detaching the female screw member 48 to / from the focusing lens frame 2006 is provided in the second barrel segment 1204, the movable lens group for focusing is provided in the second barrel segment 1204. After mounting 20 and the guide mechanism 30, the female screw member 48 can be attached to the focusing lens frame 2006. Therefore, when incorporating the focus movable lens group 20 and the guide mechanism 30 into the second barrel segment 1204, the female screw member 48 does not interfere with the work, which is advantageous in improving the efficiency of the assembly work.

なお、本実施例においては、撮像装置としてデジタルスチルカメラを例示したが、本発明はビデオカメラやテレビカメラなど撮像装置に無論適用可能である。 In the present embodiment, a digital still camera is exemplified as the imaging device, but the present invention can of course be applied to an imaging device such as a video camera or a television camera.

実施例１の撮像装置を前方から見た斜視図である。It is the perspective view which looked at the imaging device of Example 1 from the front. 実施例１の撮像装置を後方から見た斜視図である。It is the perspective view which looked at the imaging device of Example 1 from back. 実施例１の撮像装置を下方から見た斜視図である。It is the perspective view which looked at the imaging device of Example 1 from the lower part. メモリカードおよびバッテリーの収容状態を説明する説明図である。It is explanatory drawing explaining the accommodation state of a memory card and a battery. 撮像装置の制御系を示すブロック図である。It is a block diagram which shows the control system of an imaging device. レンズ鏡筒１０を斜め前方から見た斜視図である。It is the perspective view which looked at the lens-barrel 10 from diagonally forward. レンズ鏡筒１０を斜め後方から見た斜視図である。It is the perspective view which looked at the lens-barrel 10 from diagonally backward. レンズ鏡筒１０の一部の構成を示す分解斜視図である。2 is an exploded perspective view showing a configuration of a part of the lens barrel 10. FIG. レンズ鏡筒１０の残りの構成を示す分解斜視図である。2 is an exploded perspective view showing the remaining configuration of the lens barrel 10. FIG. 図６のＸＸ線断面図である。It is XX sectional drawing of FIG. 図６のＹＹ線断面図である。It is the YY sectional view taken on the line of FIG. レンズ鏡筒１０の左側部分の断面斜視図である。2 is a cross-sectional perspective view of a left portion of the lens barrel 10. FIG. レンズ鏡筒１０の右側部分の断面斜視図である。2 is a cross-sectional perspective view of a right side portion of the lens barrel 10. FIG. 第１鏡筒分割体１２０２の横断面図である。FIG. 6 is a cross-sectional view of the first lens barrel divided body 1202. 第２鏡筒分割体１２０４の横断面図である。It is a cross-sectional view of the second barrel segment 1204. ズーム用可動レンズ群１８、フォーカス用可動レンズ群２０の斜視図である。3 is a perspective view of a zoom movable lens group 18 and a focus movable lens group 20. FIG. 第２鏡筒分割体１２０４の要部の断面斜視図である。FIG. 10 is a cross-sectional perspective view of a main part of a second barrel segment 1204. 第１鏡筒分割体１２０２、第２鏡筒分割体１２０４、第３鏡筒分割体１２０６の断面図である。FIG. 5 is a cross-sectional view of a first barrel segment 1202, a second barrel segment 1204, and a third barrel segment 1206. 雌ねじ部材４８の斜視図である。4 is a perspective view of a female screw member 48. FIG. 雌ねじ部材４８の説明図である。It is explanatory drawing of the internal thread member. フォーカス用レンズ枠２００６と雌ねじ部材４８の組立説明図である。FIG. 6 is an assembly explanatory diagram of a focusing lens frame 2006 and a female screw member 48. 雌ねじ部材４８の第２軸４８１２とフォーカス用レンズ枠２００６の第２フランジ２０１７の説明図である。FIG. 10 is an explanatory diagram of a second shaft 4812 of the female screw member 48 and a second flange 2017 of the focusing lens frame 2006. 雌ねじ部材４８のフォーカス用レンズ枠２００６への組立説明図である。FIG. 10 is an assembly explanatory diagram of the female screw member 48 to the focusing lens frame 2006. 雌ねじ部材４８のフォーカス用レンズ枠２００６への組立説明図である。FIG. 10 is an assembly explanatory diagram of the female screw member 48 to the focusing lens frame 2006. 雌ねじ部材４８のフォーカス用レンズ枠２００６への組立説明図である。FIG. 10 is an assembly explanatory diagram of the female screw member 48 to the focusing lens frame 2006. 雌ねじ部材４８のフォーカス用レンズ枠２００６への組立説明図である。FIG. 10 is an assembly explanatory diagram of the female screw member 48 to the focusing lens frame 2006.

Explanation of symbols

１００……撮像装置、１０４……光学系、１２８……撮像素子、１２０４……第２鏡筒分割体、１２０４Ａ……部品収容空間、１２０４Ｅ……欠部、１２０５……上壁、１２０５Ａ……下面、１２０６……第３鏡筒分割体、２０……フォーカス用可動レンズ群、３０……案内機構、３４……駆動手段、３４０２……ホルダ、３４０４……モータ、３４０６……雄ねじ部材、３４０８……支持板、４８……雌ねじ部材、２０４……雄ねじ、２０４Ａ……頭部。
DESCRIPTION OF SYMBOLS 100 ... Imaging device, 104 ... Optical system, 128 ... Imaging element, 1204 ... 2nd lens-barrel division | segmentation body, 1204A ... Component accommodation space, 1204E ... Missing part, 1205 ... Upper wall, 1205A ... Lower surface, 1206... Third lens barrel divided body, 20... Movable lens group for focusing, 30... Guide mechanism, 34. ...... Support plate, 48... Female screw member, 204.

Claims

A lens barrel having a length;
An image sensor provided in a component housing space inside the lens barrel;
An optical system provided in a component housing space inside the lens barrel and guiding a subject image to the image sensor;
The lens barrel includes a first lens barrel divided body and a second lens barrel divided body divided in the length direction,
The optical system is provided in a component housing space of the first lens barrel divided body, and is provided with a movable lens group that is movable in the optical axis direction of the optical system, and a guide that movably supports the movable lens group. A mechanism,
Furthermore, the first lens barrel divided body is provided with driving means for moving the movable lens group,
The drive means is a male screw member that extends in the length direction of the first lens barrel segment and is driven to rotate in parallel with the optical axis direction in the component housing space of the first lens barrel segment. And a holder that supports the male screw member, and a female screw member that is coupled to the movable lens group portion so as to be immovable in the optical axis direction and is screwed to the male screw member.
The holder is disposed in the component housing space of the first barrel segment, supports the tip of the male screw member, and faces the wall portion of the first barrel segment near the second barrel segment. Having a support plate,
The first lens barrel divided body and the second lens barrel divided body are inserted into the wall portion from the first lens barrel divided body side to the wall portion in the component housing space of the first lens barrel divided body. Fastened by the male screw where the head is located,
The female screw member, the support plate, and the male screw are configured such that the outline of the head of the male screw overlaps the outline of the female screw member when viewed from a direction parallel to the optical axis direction of the optical system, and the head of the male screw Is arranged so that the outline of the support plate is located outside the outline of the support plate,
A lens barrel characterized by that.

The lens barrel is formed in a flat plate shape having a width, a length, and a thickness, and the driving means is provided at an end in the width direction of the first lens barrel divided body. The lens barrel according to 1.

The lens barrel according to claim 1, wherein the movable lens group includes a movable lens and a lens frame that supports the movable lens, and the female screw member is detachably coupled to the lens frame.

The lens barrel is formed in a flat plate shape having a width, a length, and a thickness, and extends in a length direction of the first lens barrel divided body at an end portion in a width direction of the first lens barrel divided body. A cutout portion communicating with the component housing space is provided, and the male screw member is disposed at the end portion in the width direction of the component housing space of the first lens barrel divided body through the cutout portion together with the support plate. The lens barrel according to claim 1.

The movable lens group includes a movable lens and a lens frame that supports the movable lens, the female screw member is detachably coupled to the lens frame, and the lens barrel has a width, a length, and a thickness. The lens barrel has a front surface and a rear surface positioned at both ends in the width direction, the driving means is provided at an end portion in the width direction of the first lens barrel divided body, and the driving means An opening for attaching and detaching the female screw member to and from the lens frame is provided at a position on the front surface or the rear surface near the end of the first lens barrel divided body provided. The lens barrel according to claim 1, wherein the lens barrel is formed.

The lens barrel according to claim 1, wherein the driving means includes a motor supported by the holder and rotationally driving the male screw member, and a base portion of the male screw member is coupled to the motor.

The guide mechanism extends in parallel to the optical axis direction of the movable lens group in the component housing space and engages the movable lens group with the movable lens group in the optical axis direction of the movable lens. The lens barrel according to claim 1, comprising two guide shafts for guiding the lens.

A lens barrel having a length;
An image sensor provided in a component housing space inside the lens barrel;
An imaging apparatus having a lens barrel provided with an optical system that is provided in a component housing space inside the barrel and guides a subject image to the imaging element,
The lens barrel includes a first lens barrel divided body and a second lens barrel divided body divided in the length direction,
The optical system is provided in a component housing space of the first lens barrel divided body, and is provided with a movable lens group that is movable in the optical axis direction of the optical system, and a guide that movably supports the movable lens group. A mechanism,
Furthermore, the first lens barrel divided body is provided with driving means for moving the movable lens group,
The drive means is a male screw member that extends in the length direction of the first lens barrel segment and is driven to rotate in parallel with the optical axis direction in the component housing space of the first lens barrel segment. And a holder that supports the male screw member, and a female screw member that is coupled to the movable lens group portion so as to be immovable in the optical axis direction and is screwed to the male screw member.
The holder is disposed in the component housing space of the first barrel segment, supports the tip of the male screw member, and faces the wall portion of the first barrel segment near the second barrel segment. Having a support plate,
The first lens barrel divided body and the second lens barrel divided body are inserted into the wall portion from the first lens barrel divided body side to the wall portion in the component housing space of the first lens barrel divided body. Fastened by the male screw where the head is located,
The female screw member, the support plate, and the male screw are configured such that the outline of the head of the male screw overlaps the outline of the female screw member when viewed from a direction parallel to the optical axis direction of the optical system, and the head of the male screw Is arranged so that the outline of the support plate is located outside the outline of the support plate,
An imaging apparatus characterized by that.