JP2006133344A - Lens barrel, imaging apparatus, and manufacturing method of lens barrel - Google Patents

Lens barrel, imaging apparatus, and manufacturing method of lens barrel Download PDF

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JP2006133344A
JP2006133344A JP2004320094A JP2004320094A JP2006133344A JP 2006133344 A JP2006133344 A JP 2006133344A JP 2004320094 A JP2004320094 A JP 2004320094A JP 2004320094 A JP2004320094 A JP 2004320094A JP 2006133344 A JP2006133344 A JP 2006133344A
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lens
lens barrel
fixed
fixed lens
barrel
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JP4863040B2 (en
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Eiji Miyagaki
英治 宮垣
Yasuto Matsubara
康人 松原
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Sony Corp
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Sony Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a lens barrel capable of realizing the miniaturization of an apparatus, the reduction of the number of parts and the reduction of cost, and to provide an imaging apparatus and the manufacturing method of the lens barrel. <P>SOLUTION: The 3rd fixed lens 27 is equipped with a front surface 2702 and a back surface 2704, an outer peripheral surface 2706 connecting the front surface 2702 and the back surface 2704, and an abutting surface 2708 extended on a plane orthogonal to the optical axis of the 3rd fixed lens 27. The outer circumferential surface 2706 has two plane parts 2710 formed of planes parallel with each other. A lens attaching part 54 is equipped with a spring means 56 for making the abutting surface 2708 abut on an abutting wall 5402, two attaching walls 5404, and holes 5406 and 5407 for injecting the adhesive provided on the respective attaching walls 5404. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明はレンズ鏡筒および撮像装置並びにその製造方法に関する。   The present invention relates to a lens barrel, an imaging device, and a manufacturing method thereof.

撮像装置のレンズ鏡筒は、鏡筒の内部に設けられた撮像素子と、前記鏡筒の内部で被写体像を前記撮像素子に導く光学系とを備えている。
光学系は、多くの場合、鏡筒内部に設けられたレンズ取付部に固定された固定レンズを含んで構成されている。
このような固定レンズは、光学系の光軸にその光軸を合致させた状態で、すなわち調芯がなされた状態で鏡筒に取り付ける必要があり、固定レンズを取り付けるにあたって、光学系のレンズを保持するための基板を設け、鏡筒に組み込む前にこの基板上において固定レンズを他の光学系のレンズに対して位置決め固定する技術が知られている（例えば特許文献１参照）。
特開平１０−２３２３３５号公報 The lens barrel of the imaging apparatus includes an imaging element provided inside the barrel and an optical system that guides a subject image to the imaging element inside the barrel.
In many cases, the optical system includes a fixed lens fixed to a lens mounting portion provided inside the lens barrel.
Such a fixed lens needs to be attached to the lens barrel with its optical axis aligned with the optical axis of the optical system, that is, in a state where the optical axis is aligned. A technique is known in which a substrate for holding is provided, and a fixed lens is positioned and fixed on a lens of another optical system on the substrate before being incorporated in a lens barrel (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 10-232335

しかしながら、このような従来技術では、鏡筒の内部において、固定レンズを鏡筒に対して位置決めすることができない不具合があった。
また、鏡筒の内部に、固定レンズを位置決めするための調整機構を組み込んだものも提案されているが、調整機構を鏡筒の内部に組み込むため、装置が大型化し、また、装置毎に調整機構を有することから部品点数が増大し、コストの低減化を図ることができない不具合があった。
本発明はこのような事情に鑑みなされたものであり、その目的は、装置の小型化を図れ、また、部品点数の削減化、コストの低減化を図ることができるレンズ鏡筒および撮像装置並びにその製造方法を提供することにある。 However, such a conventional technique has a problem that the fixed lens cannot be positioned with respect to the lens barrel inside the lens barrel.
In addition, there is a proposal that incorporates an adjustment mechanism for positioning the fixed lens inside the lens barrel. However, since the adjustment mechanism is incorporated inside the lens barrel, the size of the device increases, and adjustment is performed for each device. Since it has a mechanism, the number of parts increases, and there is a problem that the cost cannot be reduced.
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a lens barrel, an imaging device, and a lens barrel that can reduce the size of the device, reduce the number of components, and reduce costs. It is in providing the manufacturing method.

上述の目的を達成するため、鏡筒の内部に設けられた撮像素子と、前記鏡筒の内部で被写体像を前記撮像素子に導く光学系とを備え、前記光学系は、前記鏡筒の内部のレンズ取付部に固定された固定レンズを有するレンズ鏡筒であって、前記固定レンズは、厚さ方向の両端に位置する前面および背面と、これら前面および背面を接続する外周面と、前記固定レンズの光軸と直交する面上を延在する当て付け面とを備え、前記外周面は、互いに対向し互いに平行する平面で形成された２つの平面部と、前記２つの平面部の両端をそれぞれ接続する２つの環状面とを有し、前記レンズ取付部は、前記当て付け面に当接可能な当接壁と、前記固定レンズの前面または背面の一方の外周面寄り箇所に弾接し前記当て付け面を前記当接壁に当接させるばね手段と、前記各平面部との間に隙間をあけて各平面部にそれぞれ臨むように設けられた２つの取り付け壁と、前記各取り付け壁に前記鏡筒の内部と外部とを貫通し前記鏡筒の内部において前記平面部に臨むようにそれぞれ設けられた接着剤注入用孔とを備え、前記固定レンズは、前記ばね手段により前記当て付け面が前記当接壁に当接された状態で前記接着剤注入用孔から注入された接着剤により前記２つの平面部が前記各取り付け壁にそれぞれ平行した状態で固定されていることを特徴とする。
また、本発明は、鏡筒の内部に設けられた撮像素子と、前記鏡筒の内部で被写体像を前記撮像素子に導く光学系とを備え、前記光学系は、前記鏡筒の内部のレンズ取付部に固定された固定レンズを有するレンズ鏡筒の製造方法であって、前記固定レンズは、厚さ方向の両端に位置する前面および背面と、これら前面および背面を接続する外周面と、前記固定レンズの光軸と直交する面上を延在する当て付け面とを備え、前記外周面は、互いに対向し互いに平行する平面で形成された２つの平面部と、前記２つの平面部の両端をそれぞれ接続する２つの環状面とを有し、前記レンズ取付部に、前記当て付け面に当接可能な当接壁と、前記固定レンズの前面または背面の一方の外周面寄り箇所に弾接し前記当て付け面を前記当接壁に当接させるばね手段と、前記各平面部との間に隙間をあけて各平面部にそれぞれ臨む２つの取り付け壁と、前記各取り付け壁に前記鏡筒の内部と外部とを貫通し前記鏡筒の内部において前記平面部に臨む２つの接着剤注入用孔とを設けておき、前記固定レンズを、前記ばね手段により前記当て付け面を前記当接壁に当接させた状態とし、２つの接着剤注入用孔のうちの一方の接着剤注入用孔から第１の治具を挿入してその先端を前記平面部に当て付ける共に、２つの接着剤注入用孔のうちの他方の接着剤注入用孔から第２の治具を挿入してその先端を前記平面部の両端の環状面にそれぞれ当て付け、前記第１の治具と第２の治具により、各平面部が２つの取り付け壁に対して平行状態を維持するように前記ばね手段の付勢力に抗して前記固定レンズを平行移動させて前記固定レンズの光軸調整を行い、前記光軸調整の後、２つの接着剤注入用孔からそれぞれ接着剤を注入し、この接着剤により前記固定レンズを前記レンズ取り付け部に取着するようにしたことを特徴とする。
また、本発明は、鏡筒の内部に設けられた撮像素子と、前記鏡筒の内部で被写体像を前記撮像素子に導く光学系とを備え、前記光学系は、前記鏡筒の内部のレンズ取付部に固定された固定レンズを有するレンズ鏡筒を備える撮像装置であって、前記固定レンズは、厚さ方向の両端に位置する前面および背面と、これら前面および背面を接続する外周面と、前記固定レンズの光軸と直交する面上を延在する当て付け面とを備え、前記外周面は、互いに対向し互いに平行する平面で形成された２つの平面部と、前記２つの平面部の両端をそれぞれ接続する２つの環状面とを有し、前記レンズ取付部は、前記当て付け面に当接可能な当接壁と、前記固定レンズの前面または背面の一方の外周面寄り箇所に弾接し前記当て付け面を前記当接壁に当接させるばね手段と、前記各平面部との間に隙間をあけて各平面部にそれぞれ臨むように設けられた２つの取り付け壁と、前記各取り付け壁に前記鏡筒の内部と外部とを貫通し前記鏡筒の内部において前記平面部に臨むようにそれぞれ設けられた接着剤注入用孔とを備え、前記固定レンズは、前記ばね手段により前記当て付け面が前記当接壁に当接された状態で前記接着剤注入用孔から注入された接着剤により前記２つの平面部が前記各取り付け壁にそれぞれ平行した状態で固定されていることを特徴とする。 In order to achieve the above-described object, an imaging device provided inside a lens barrel and an optical system that guides a subject image to the imaging device inside the lens barrel, and the optical system includes an interior of the lens barrel. A lens barrel having a fixed lens fixed to the lens mounting portion, wherein the fixed lens includes a front surface and a back surface located at both ends in the thickness direction, an outer peripheral surface connecting the front surface and the back surface, and the fixed lens. An abutting surface extending on a surface orthogonal to the optical axis of the lens, and the outer peripheral surface includes two plane portions formed by planes facing each other and parallel to each other, and both ends of the two plane portions. Each having two annular surfaces connected to each other, and the lens mounting portion is elastically contacted with a contact wall capable of contacting the abutting surface and a position near one outer peripheral surface of the front surface or the back surface of the fixed lens. If the abutment surface is brought into contact with the contact wall Means and two mounting walls provided so as to face each plane part with a gap between each plane part, and through each of the mounting walls through the inside and the outside of the lens barrel, the mirror An adhesive injection hole provided so as to face the flat portion inside the cylinder, and the fixed lens is configured so that the abutment surface is in contact with the contact wall by the spring means. The two flat portions are fixed in parallel with the respective attachment walls by an adhesive injected from an adhesive injection hole.
In addition, the present invention includes an image sensor provided inside a lens barrel and an optical system that guides a subject image to the image sensor inside the lens barrel, and the optical system includes a lens inside the lens barrel. A method of manufacturing a lens barrel having a fixed lens fixed to a mounting portion, wherein the fixed lens includes a front surface and a back surface positioned at both ends in a thickness direction, an outer peripheral surface connecting the front surface and the back surface, An abutting surface extending on a surface orthogonal to the optical axis of the fixed lens, and the outer peripheral surface includes two plane portions formed by planes facing each other and parallel to each other, and both ends of the two plane portions Two annular surfaces that respectively connect to the lens mounting portion, and abutment walls that can abut against the abutting surface, and elastically contact a portion near one outer peripheral surface of the front surface or the rear surface of the fixed lens. When the abutting surface is brought into contact with the contact wall Means and two mounting walls that face each plane portion with a gap between each plane portion, and each mounting wall passes through the inside and outside of the lens barrel and passes through the inside and outside of the lens barrel. Two adhesive injection holes facing the flat surface portion are provided, and the fixed lens is brought into contact with the abutting wall by the spring means, and two adhesive injection holes are provided. A first jig is inserted from one of the two adhesive injection holes and the tip of the first jig is applied to the flat portion, and the second one of the two adhesive injection holes is inserted from the second adhesive injection hole. 2 jigs are inserted, and their tips are respectively applied to the annular surfaces at both ends of the plane part, and each plane part is parallel to two mounting walls by the first jig and the second jig. Parallel the fixed lens against the biasing force of the spring means so as to maintain the state. To adjust the optical axis of the fixed lens, and after adjusting the optical axis, the adhesive is injected from the two adhesive injection holes, and the fixed lens is attached to the lens mounting portion by the adhesive. It was made to do.
In addition, the present invention includes an image sensor provided inside a lens barrel and an optical system that guides a subject image to the image sensor inside the lens barrel, and the optical system includes a lens inside the lens barrel. An imaging apparatus including a lens barrel having a fixed lens fixed to a mounting portion, wherein the fixed lens includes a front surface and a back surface positioned at both ends in the thickness direction, and an outer peripheral surface connecting the front surface and the back surface. An abutment surface extending on a plane orthogonal to the optical axis of the fixed lens, and the outer peripheral surface includes two plane portions formed by planes facing each other and parallel to each other, and the two plane portions The lens mounting portion has an abutment wall capable of abutting against the abutting surface and one of the front and back surfaces of the fixed lens near the outer peripheral surface. The abutting surface is in contact with the contact wall. Two attachment walls provided so as to face each planar portion with a gap between each spring means and each planar portion, and the interior and the exterior of the lens barrel penetrate each of the attachment walls. An adhesive injection hole provided so as to face the flat portion inside the lens barrel, and the fixed lens is in a state in which the abutting surface is in contact with the contact wall by the spring means The two flat portions are fixed in parallel with the mounting walls by an adhesive injected from the adhesive injection hole.

そのため、本発明によれば、固定レンズの外周面は、外周面の互いに対向する箇所に形成された２つの平面部を有し、各平面部が取り付け壁にほぼ平行するように配置されているので、鏡筒の前後方向の厚さを短縮し、撮像装置の小型化を図る上で有利となる。
接着剤を注入する前にこれら接着剤注入用孔を利用して固定レンズの光軸調整を簡単に行うことができ、組み立て作業効率を向上し組み立てコストを低減する上で有利となる。
また、固定レンズの位置決めと接着を同一の接着剤注入孔を用いて行なうため、鏡筒に設ける孔が少なくて済み、鏡筒の小型化および強度向上を図る上で有利である。
また、本実施例では、当接壁とばね手段によって固定レンズを保持しているので、適宜治具により接着剤注入用孔から固定レンズの光軸調整を行った後、前記の治具を取り出しても固定レンズは光軸調整された状態に保持され、したがって、組み立て作業効率をより一層向上する上で有利となる。
また、光軸調整の際、互いに対向する２つの接着剤注入用孔から互いに対向する固定レンズの箇所に第１の治具と第２の治具を当て付けるので、第１の治具と第２の治具により固定レンズを回転させることなく平行移動でき、光軸調整の際の固定レンズの損傷を防止でき、また、有効径の範囲内に平面部が入ることを防止できる。 Therefore, according to the present invention, the outer peripheral surface of the fixed lens has two flat portions formed at locations on the outer peripheral surface facing each other, and each flat portion is disposed so as to be substantially parallel to the mounting wall. This is advantageous in reducing the thickness of the lens barrel in the front-rear direction and reducing the size of the imaging apparatus.
The optical axis of the fixed lens can be easily adjusted using these adhesive injection holes before the adhesive is injected, which is advantageous in improving the assembly work efficiency and reducing the assembly cost.
Further, since the fixed lens is positioned and bonded by using the same adhesive injection hole, the number of holes provided in the lens barrel is small, which is advantageous in reducing the size and improving the strength of the lens barrel.
In this embodiment, since the fixed lens is held by the contact wall and the spring means, the optical axis of the fixed lens is appropriately adjusted from the adhesive injection hole by a jig, and then the jig is taken out. Even so, the fixed lens is held in a state in which the optical axis is adjusted, which is advantageous in further improving the assembly work efficiency.
Further, when the optical axis is adjusted, the first jig and the second jig are applied from the two adhesive injection holes facing each other to the fixed lens portions facing each other. The fixed lens can be translated without rotating by the jig of 2, the damage of the fixed lens at the time of optical axis adjustment can be prevented, and the flat portion can be prevented from entering the range of the effective diameter.

装置の小型化、部品点数の削減化、コストの低減化を図るという目的を、固定レンズの外周面に２つの平面部を設け、ばね手段により固定レンズの当て付け面がレンズ取付部の当接壁に当接された状態で固定レンズを位置決めし、接着剤注入用孔に注入された接着剤により２つの平面部がレンズ取付部の取り付け壁にそれぞれ平行した状態で固定することによって実現した。   For the purpose of reducing the size of the device, reducing the number of parts, and reducing the cost, two flat portions are provided on the outer peripheral surface of the fixed lens, and the abutment surface of the fixed lens is brought into contact with the lens mounting portion by a spring means. This is realized by positioning the fixed lens in contact with the wall and fixing the two flat portions in parallel with the mounting wall of the lens mounting portion by the adhesive injected into the adhesive injection hole.

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の前後方向は被写体側を前方、被写体側と反対側を後方といい、ケース１０２の左右方向はケース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、撮像素子１２８と、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。
光学系１０４は対物レンズ１４を備え、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 this specification, the front-rear direction of the case 102 is referred to as the front side and the opposite side of the subject side is referred to as the rear side, and the left-right direction of the case 102 is referred to when the case 102 is viewed from the front side.
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, and the lens barrel 10 has an imaging device 128 and a subject image. An optical system 104 or the like is provided.
The optical system 104 includes an objective lens 14, and 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 </ b> 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対して処理がなされることで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.
The 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 processes the image pickup signal to generate still image data or moving image image data. (Storage medium) 132. 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を前方から見た斜視図、図７はレンズ鏡筒１０を後方の下方から見た斜視図である。
図８はレンズ鏡筒１０の正面図、図９はレンズ鏡筒１０の背面図、図１０（Ａ）は図８のＡ矢視図、（Ｂ）は図８のＢ矢視図、図１１（Ｃ）は図８のＣ矢視図、（Ｄ）は図８のＤ矢視図である。
図１２は図６のＡＡ線断面図、図１３はレンズ鏡筒１０の一部の構成を示す分解斜視図、図１４はレンズ鏡筒１０の残りの構成を示す分解斜視図である。
図１５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の斜視図である。 6 is a perspective view of the lens barrel 10 as viewed from the front, and FIG. 7 is a perspective view of the lens barrel 10 as viewed from the lower rear.
8 is a front view of the lens barrel 10, FIG. 9 is a rear view of the lens barrel 10, FIG. 10A is a view taken along the arrow A in FIG. 8, and FIG. 8B is a view taken along the arrow B in FIG. (C) is a C arrow view of FIG. 8, (D) is a D arrow view of FIG.
12 is a cross-sectional view taken along line AA in FIG. 6, FIG. 13 is an exploded perspective view showing a configuration of a part of the lens barrel 10, and FIG. 14 is an exploded perspective view showing the remaining configuration of the lens barrel 10.
FIG. 15 is a perspective view of the zoom movable lens group 18 and the focus movable lens group 20.

図６〜図１４に示すように、レンズ鏡筒１０は、鏡筒１２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、対物レンズ１４と、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 14, the lens barrel 10 includes a lens barrel 12, an image sensor 128, and an optical system 104.
In this embodiment, the optical system 104 includes an objective lens 14, a reflecting member 16, a zoom movable lens group 18, a focus movable lens group 20, a first fixed lens group 22, and a second fixed lens. A group 24, a third fixed lens group 26, a guide mechanism 28 for the zoom movable lens group 18, and a guide mechanism 30 for the focus movable lens group 20 are provided.
Further, a driving means 32 for moving the zoom movable lens group 18 and a 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、撮像素子１２８と光学系１０４とは鏡筒１２の幅方向の中央からやや幅方向の一側寄りの部分で鏡筒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。
したがって、鏡筒１２は、その幅方向、長さ方向、厚さ方向を、撮像装置１００のケース１０２の左右方向、上下方向、前後方向のそれぞれに合致させた状態でケース１０２内部に配置されることになる。
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 imaging element 128 and the optical system 104 are the center in the width direction of the lens barrel 12. They are arranged side by side along the length direction of the lens barrel 12 at a portion slightly closer to one side 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.
Therefore, the lens barrel 12 is arranged inside the case 102 in a state where the width direction, the length direction, and the thickness direction thereof are matched with the left-right direction, the up-down direction, and the front-rear direction of the case 102 of the imaging apparatus 100, respectively. It will be.
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１２、図１３に示すように、第１鏡筒分割体１２０２は前壁、後壁、左壁、右壁により直方体状に形成され、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。
本実施例では、被写体像を撮像素子１２８に導く光学系１０４の光路が、対物レンズ１４から後方に延在し反射部材１６の反射面に至る第１の光路部分と、反射部材１６の反射面から下方に延在し撮像素子１２８に至る第２の光路部分とで構成されている。
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、図１３に示すように、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. 12 and 13, the first lens barrel divided body 1202 is formed in a rectangular parallelepiped shape by a front wall, a rear wall, a left wall, and a right wall, and a cross section is formed inside the first lens barrel divided body 1202. A rectangular component opening space 1202A is provided on the lower surface, and the objective lens 14 has a first lens barrel segment 1202 with a lens retainer 1402 positioned on the front surface side and a light shielding frame 1404 positioned on the rear surface side. At the top of the front is attached.
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.
In the present embodiment, the optical path of the optical system 104 that guides the subject image to the image sensor 128 extends rearward from the objective lens 14 and reaches the reflecting surface of the reflecting member 16, and the reflecting surface of the reflecting member 16. And a second optical path portion extending downward from the image sensor 128 to the image sensor 128.
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.
As shown in FIG. 13, the first fixed lens group 22 includes a first fixed lens 2202 incorporated in the mounting portion of the first barrel segment 1202, and the first fixed lens 2202 fixed to the mounting portion. And a pressing member 2204 (also serving as a light shielding frame).

図１２、図１３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とで構成されている。
これら第１、第２、第３のズームレンズ１８０２、１８０４、１８０５はズーム用レンズ枠１８０６により支持されている。
ズーム用レンズ枠１８０６は、駆動手段３２によりメインガイド軸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、ズーム動作がなされる。
図１５に示すように、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。
延在部１８１２には、図１３に示すように、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、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かつ軸３６０２を支点に揺動可能に結合される。 As shown in FIGS. 12 and 13, the zoom movable lens group 18 includes a first zoom lens 1802 and second and third zoom lenses 1804 and 1805 bonded together.
The first, second, and third zoom lenses 1802, 1804, and 1805 are supported by a zoom lens frame 1806.
The zoom lens frame 1806 is reciprocated along the optical axis direction while being guided by the driving means 32 to the main guide shaft 38 and the sub guide shaft 40, and a zoom operation is performed.
As shown in FIG. 15, the zoom lens frame 1806 is positioned around the first, second, and third zoom lenses 1802, 1804, 1805, and these first, second, and third zoom lenses 1802, 1804. , 1805 and an extending portion 1812 extending from the holding portion 1810 in the width direction in the component housing space 1202A.
As shown in FIG. 13, the extending portion 1812 is provided with flanges 1816 and 1816 that are opposed to each other in the longitudinal direction of the lens barrel 12. The flanges 1816 and 1816 are provided with internal threads 3604 via shafts 3602 and 3602. The female screw member 36 is coupled so as not to move in the longitudinal direction of the lens barrel 12 and to be swingable about the shaft 3602 as a fulcrum.

また、延在部１８１２には、ロッド挿通孔１８１４が設けられている。
図１５に示すように、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。
また、図１５に示すように、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の隅部に位置する箇所に係合溝１８１８が形成されている。
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（図１３）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、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。 In addition, the extending portion 1812 is provided with a rod insertion hole 1814.
As shown in FIG. 15, 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.
Further, as shown in FIG. 15, an engagement groove 1818 is formed at a location of the holding portion 1810 located on the side opposite to the extending portion 1812 and located at the corner of the component housing space 1202A.
A sub guide shaft 40 (FIG. 13) extending in the length direction of the first lens barrel divided body 1202 is slidably inserted into the engagement groove 1818. Accordingly, the sub guide shaft 40 prevents the zoom lens 18 from rotating around the main guide shaft 38. 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１３、図１５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、ズーム動作がなされる。
本実施例では、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. 13 and 15, 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 </ b> 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 and zooming is performed.
In the present embodiment, the zoom movable lens group 18, the main guide shaft 38, and the male screw member 3206 are arranged inside the first lens barrel divided body 1202 in the width direction of the first lens barrel divided body 1202. The guide shaft 40 is disposed at the position of the zoom lens frame 1806 located on the opposite side of the main guide shaft 38 and the male screw member 3206.

図１２、図１３に示すように、第３鏡筒分割体１２０６は、部品収容空間１２０２Ａ内に臨む内部部分１２０６Ａと、部品収容空間１２０２Ａ外に位置する外部部分１２０６Ｂとを有している。
図１３に示すように、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、第２固定レンズ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、光学系１０４の光軸を前記幅方向で挟んで配置された２枚の絞り羽根４２０２と、各絞り羽根４２０２を前記幅方向に移動可能に案内する案内部材４２０４とを備えている。
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２枚の絞り羽根４２０２が接離する方向に移動されることで、２枚の絞り羽根４２０２が開閉されこれにより前記光軸に沿って進行する光束の光量を調節するように構成されている。 As shown in FIGS. 12 and 13, the third barrel segment 1206 has an internal portion 1206 </ b> A that faces the component storage space 1202 </ b> A and an external portion 1206 </ b> B that is positioned outside the component storage space 1202 </ b> A.
As shown in FIG. 13, the second fixed lens group 24 is attached to the internal portion 1206A so that its optical axis coincides with the optical axis of the zoom movable lens group 18, and an iris is mounted on the rear surface of the second fixed lens 24. An (aperture) 42 is disposed.
The iris 42 includes two diaphragm blades 4202 arranged with the optical axis of the optical system 104 sandwiched in the width direction, and a guide member 4204 that guides each diaphragm blade 4202 to be movable in the width direction. Yes.
The iris 42 is moved in the direction in which the two diaphragm blades 4202 are brought into contact with and separated from each other by the drive unit 44 attached to the outer portion 1206B of the third barrel segment 1206, so that the two diaphragm blades 4202 are opened and closed. Thus, the light quantity of the light beam traveling along the optical axis is adjusted.

図１４に示すように、第２鏡筒分割体１２０４は、前壁１２０５Ａ、後壁１２０５Ｂ、左壁１２０５Ｃ、右壁１２０５Ｄにより直方体状に形成され、第２鏡筒分割体１２０４の内部には、断面が矩形で上下に開放された部品収容空間１２０４Ａが形成されている。
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、撮像素子取付板４６が取着されることで部品収容空間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内に配置されている。 As shown in FIG. 14, the second lens barrel divided body 1204 is formed in a rectangular parallelepiped shape by a front wall 1205A, a rear wall 1205B, a left wall 1205C, and a right wall 1205D, and inside the second lens barrel divided body 1204, A component housing space 1204A having a rectangular cross section and opened up and down is formed.
The image sensor mounting plate 46 is attached to the lower part of the second barrel segment 1204, and the lower end of the component housing space 1204A is closed by attaching the image sensor mounting plate 46. 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 in the component housing space 1204A.

図１４に示すように、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で構成されている。
これら第１、第２のフォーカスレンズ２００２、２００４は、フォーカス用レンズ枠２００６により支持されている。
フォーカス用レンズ枠２００６は、駆動手段３４によりメインガイド軸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、フォーカス動作がなされる。
図１５に示すように、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。
延在部２０１２には、図１４に示すように、鏡筒１２の長手方向において互いに対向するフランジ２０１６、２０１６が設けられ、これらフランジ２０１６、２０１６には、軸４８０２、４８０２を介して雌ねじ４８０４を有する雌ねじ部材４８が鏡筒１２の長手方向に移動不能にかつ軸４８０２を支点として揺動可能に結合される。 As shown in FIG. 14, the focus movable lens group 20 is composed of first and second focus lenses 2002 and 2004 bonded together.
These first and second focus lenses 2002 and 2004 are supported by a focus lens frame 2006.
The focusing lens frame 2006 is reciprocated along the optical axis direction while being guided by the driving means 34 to the main guide shaft 50 and the sub guide shaft 52, and a focusing operation is performed.
As shown in FIG. 15, the focus lens frame 2006 is positioned around the first and second focus lenses 2002 and 2004, and a holding unit 2010 that holds the first and second focus lenses 2002 and 2004. The holding part 2010 has an extending part 2012 extending in the width direction in the component housing space 1204A.
As shown in FIG. 14, flanges 2016 and 2016 that are opposed to each other in the longitudinal direction of the lens barrel 12 are provided in the extending portion 2012, and a female screw 4804 is provided on these flanges 2016 and 2016 via shafts 4802 and 4802. A female screw member 48 is coupled so as not to move in the longitudinal direction of the lens barrel 12 and to be swingable about a shaft 4802.

また、延在部２０１２には、ロッド挿通孔２０１４が設けられている。
図１４、図１５に示すように、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２８の光軸方向に案内している。
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に係合溝２０１８が形成されている。
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（図１４）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。 Further, a rod insertion hole 2014 is provided in the extended portion 2012.
As shown in FIGS. 14 and 15, a metal main guide shaft 50 extending in the length direction of the second barrel segment 1204 is slidably inserted into the rod insertion hole 2014. 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 28.
Further, as shown in FIG. 15, an engagement groove 2018 is formed in the holding portion 2010 located on the side opposite to the extending portion 2012.
A sub guide shaft 52 (FIG. 14) 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 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. 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.

図１４、図１５に示すように、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の下部に設けられたモータ３４０４と、ホルダ３４０２に沿って延在しモータ３４０４により回転駆動される雄ねじ部材３４０６とを有している。
ホルダ３４０２は第２鏡筒分割体１２０４の右側面の欠部に取着され、これにより雄ねじ部材３４０６が部品収容空間１２０４Ａに位置し、モータ３４０４は第２鏡筒分割体１２０４の下部に位置する。
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、フォーカス動作がなされる。
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の内部で第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。 As shown in FIGS. 14 and 15, 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, and a motor 3404 provided below the holder 3402. And a male screw member 3406 that extends along the holder 3402 and is driven to rotate by a motor 3404.
The holder 3402 is attached to a notch on the right side surface of the second barrel segment 1204, whereby the male screw member 3406 is located in the component housing space 1204 </ b> A, and the motor 3404 is located in the lower portion of the second barrel segment 1204. .
The male screw member 3406 is screwed into the female screw 4804 of the female screw member 48. Accordingly, the movable lens group for focus 20 is guided along the optical axis direction while being guided by the main guide shaft 50 and the sub guide shaft 52 by forward and reverse rotation of the motor 3404. A reciprocating movement is performed and a focusing operation is performed.
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 inside the second barrel segment 1204. 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.

図１２、図１４に示すように、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。 As shown in FIGS. 12 and 14, the image sensor mounting plate 46 is attached to the lower part of the second barrel segment 1204 by screws 206 and 206 so as to close the lower end of the component housing space 1204 </ b> A.
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１２に示すように、部品収容空間１２０４Ａに臨む第２鏡筒分割体１２０４の前面箇所および後面箇所で第２鏡筒分割体１２０４Ａの上端と第３の固定レンズ群２６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の前面箇所および後面箇所で第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の前面箇所および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。
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。 In addition, as shown in FIG. 12, between the upper end of the second lens barrel segment 1204A and the third fixed lens group 26 at the front surface portion and the rear surface location of the second lens barrel segment 1204 facing the component housing space 1204A. An uneven portion 1204C is provided at the location.
Further, an uneven portion 1204D is provided at a position between the third fixed lens group 26 and the image sensor 128 at the front surface portion and the rear surface portion of the second barrel segment 1204 facing the component housing space 1204A.
These concave and convex portions 1204C and 1204D have entered 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 24, and the focus movable lens group 20. Of the light, reflected light called so-called flare or ghost is generated by the light reaching the front surface portion and the rear surface portion of the second barrel segment 1204 facing the component housing space 1204A being reflected at the rear surface portion, It is provided to prevent the reflected light from reaching the light receiving surface of the image sensor 128 and adversely affecting the image signal of the image sensor 128.
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３の固定レンズ群２６は、撮像素子１２８の上方でフォーカス用可動レンズ群２０の下方の部品収容空間１２０４Ａ箇所に配置されている。
なお、図１４に示すように、第１鏡筒分割体１２０２と第２鏡筒分割体１２０４と第３鏡筒分割体１２０６とは、前記駆動部４４近傍の箇所でねじ２０２により互いに取着され、かつ、前記駆動部３４近傍の箇所でねじ２０４により互いに取着されている。 The third fixed lens group 26 is disposed in the part accommodating space 1204 </ b> A above the image sensor 128 and below the focus movable lens group 20.
As shown in FIG. 14, the first lens barrel divided body 1202, the second lens barrel divided body 1204, and the third lens barrel divided body 1206 are attached to each other by a screw 202 at a location near the drive unit 44. In addition, they are attached to each other by screws 204 in the vicinity of the drive unit 34.

第３の固定レンズ群２６の取付構造について図１６乃至図２５を参照して説明する。
図１６は第２鏡筒分割体１２０４の分解斜視図、図１７は第２鏡筒分割体１４０４の正面図、図１８は図１７のＡ矢視図、図１９は図１７のＡＡ線断面図、図２０は図１７のＢＢ線断面図、図２１は図１７のＣＣ線断面図である。
図２２は第３の固定レンズ群２６とレンズ取付部５４の位置関係を示す説明図、図２３は図２２のＡＡ線断面図、図２４は治具によって第３の固定レンズ群２６を把持した状態を示す平面図、図２５は治具によって第３の固定レンズ群２６を把持した状態を示す斜視図である。 The mounting structure of the third fixed lens group 26 will be described with reference to FIGS.
16 is an exploded perspective view of the second barrel segment 1204, FIG. 17 is a front view of the second barrel segment 1404, FIG. 18 is a view taken along the arrow A in FIG. 17, and FIG. 20 is a cross-sectional view taken along line BB of FIG. 17, and FIG. 21 is a cross-sectional view taken along line CC of FIG.
22 is an explanatory diagram showing the positional relationship between the third fixed lens group 26 and the lens mounting portion 54, FIG. 23 is a cross-sectional view taken along the line AA in FIG. 22, and FIG. 24 is the third fixed lens group 26 held by a jig. FIG. 25 is a perspective view showing a state in which the third fixed lens group 26 is held by a jig.

図１２に示すように、第３の固定レンズ群２６は第２鏡筒分割体１２０４のレンズ取付部５４に配設されている。
図１６に示すように、第３の固定レンズ群２６は、直径の大きい第１レンズ２７Ａと、第１レンズ２７Ａよりも直径の小さい第２レンズ２７Ｂとが貼り合わせて単一体として構成された第３の固定レンズ２７で構成されている。
図１８〜図２１に示すように、第３の固定レンズ２７は、厚さ方向の両端に位置する前面２７０２および背面２７０４と、これら前面２７０２および背面２７０４を接続する外周面２７０６と、第３の固定レンズ２７の光軸と直交する面上を延在する当て付け面２７０８とを備えている。
外周面２７０６は、外周面２７０６の互いに対向する箇所が切り欠かれ互いに平行する平面で形成された２つの平面部２７１０と、２つの平面部２７１０の両端をそれぞれ接続する２つの環状面２７１２とを有している。無論、２つの平面部２７１０によって切り欠かかれた第３の固定レンズ２７の部分は、光学系１０４の有効径の外側の部分で、撮像に寄与しない部分である。
本実施例では、当て付け面２７０８は、第２レンズ２７Ｂの半径方向の外側に露出する第１レンズ２７Ａの背面部分で構成されている。
また、平面部２７１０および環状面２７１２は、第１レンズ２７Ａの外周面に形成されている。
環状面２７１２は、第３の固定レンズ２７の光軸を中心とした円筒面で形成されている。
２つの平面部２７１０は、第３の固定レンズ２７の光軸を通る仮想の平面に対して直交する平面上を延在している。各平面部２７１０は、第３の固定レンズ２７の厚さ方向に沿った幅と、前記幅と直交する方向に延在する長さとを有し、矩形状に形成されている。 As shown in FIG. 12, the third fixed lens group 26 is disposed on the lens mounting portion 54 of the second barrel segment 1204.
As shown in FIG. 16, the third fixed lens group 26 includes a first lens 27A having a large diameter and a second lens 27B having a diameter smaller than that of the first lens 27A. 3 fixed lenses 27.
As shown in FIGS. 18 to 21, the third fixed lens 27 includes a front surface 2702 and a back surface 2704 located at both ends in the thickness direction, an outer peripheral surface 2706 connecting the front surface 2702 and the back surface 2704, and a third An abutting surface 2708 extending on a surface orthogonal to the optical axis of the fixed lens 27 is provided.
The outer peripheral surface 2706 includes two flat surface portions 2710 formed by planes parallel to each other by notching portions facing each other of the outer peripheral surface 2706, and two annular surfaces 2712 respectively connecting both ends of the two flat surface portions 2710. Have. Of course, the portion of the third fixed lens 27 cut out by the two flat portions 2710 is a portion outside the effective diameter of the optical system 104 and does not contribute to imaging.
In the present embodiment, the abutting surface 2708 is constituted by a back surface portion of the first lens 27A exposed to the outside in the radial direction of the second lens 27B.
The flat portion 2710 and the annular surface 2712 are formed on the outer peripheral surface of the first lens 27A.
The annular surface 2712 is formed as a cylindrical surface with the optical axis of the third fixed lens 27 as the center.
The two plane portions 2710 extend on a plane orthogonal to a virtual plane passing through the optical axis of the third fixed lens 27. Each flat portion 2710 has a width along the thickness direction of the third fixed lens 27 and a length extending in a direction orthogonal to the width, and is formed in a rectangular shape.

レンズ取付部５４は、当て付け面２７０８に当接可能な当接壁５４０２と、当て付け面２７０８を当接壁５４０２に当接させるばね手段５６と、各平面部２７１０との間に隙間をあけて各平面部２７１０にそれぞれ臨むように設けられた２つの取り付け壁５４０４と、各取り付け壁５４０４に第３鏡筒分割体１２０４の内部と外部とを貫通し第３鏡筒分割体１２０４の内部において平面部２７１０に臨むようにそれぞれ設けられた接着剤注入用孔５４０６，５４０７とを備えている。
第３鏡筒分割体１２０４の部品収容空間１２０４Ａは、その輪郭が矩形を呈し、２つの取り付け壁５４０４は、第２鏡筒分割体１２０４の前壁１２０５Ａおよび後壁１２０５Ｂにより構成されている。
第３の固定レンズ２７は、各平面部２７１０を前壁１２０５Ａおよび後壁１２０５Ｂにほぼ平行させ、各環状面２７１２を左壁１２０５Ｃおよび右壁１２０５Ｄに近接させて配置されている。
当接壁５４０２は、図１９、図２０に示すように、左壁１２０５Ｃおよび右壁１２０５Ｄの内面に突出形成され、第３の固定レンズ２７の当て付け面２７０８の左右側部に当接している。
ばね手段５６は、ばね鋼板から形成され、図１６に示すように、第３の固定レンズ２７の前面２７０２の外周に臨む環状の枠部５６０２と、枠部５６０２の複数箇所に膨出形成された膨出部５６０４と、枠部５６０２の互いに対向する箇所から突設された係止爪５６０６および取付片５６０８とで構成されている。
ばね手段５６は、図１９に示すように、係止爪５６０６が第２鏡筒分割体１２０４の左壁１２０５Ｃの係止溝に挿入され、取付片５６０８が右壁１２０５Ｄにねじを介して取着され、各膨出部５６０４が第３の固定レンズ２７の前面２７０２の外周面寄り箇所に弾接し、第３の固定レンズ２７を当接壁５４０２に当接させている。 The lens mounting portion 54 has a gap between the abutment wall 5402 that can abut against the abutment surface 2708, the spring means 56 that abuts the abutment surface 2708 against the abutment wall 5402, and the flat portions 2710. Two mounting walls 5404 provided so as to face the respective flat portions 2710, and through each mounting wall 5404 through the inside and the outside of the third lens barrel divided body 1204, inside the third lens barrel divided body 1204 Adhesive injection holes 5406 and 5407 provided to face the flat portion 2710 are provided.
The component housing space 1204A of the third barrel segment 1204 has a rectangular outline, and the two attachment walls 5404 are constituted by the front wall 1205A and the rear wall 1205B of the second barrel segment 1204.
The third fixed lens 27 is disposed such that each flat portion 2710 is substantially parallel to the front wall 1205A and the rear wall 1205B, and each annular surface 2712 is close to the left wall 1205C and the right wall 1205D.
As shown in FIGS. 19 and 20, the contact wall 5402 is formed to protrude from the inner surfaces of the left wall 1205 </ b> C and the right wall 1205 </ b> D and is in contact with the left and right side portions of the abutting surface 2708 of the third fixed lens 27. .
The spring means 56 is formed of a spring steel plate, and as shown in FIG. 16, an annular frame portion 5602 facing the outer periphery of the front surface 2702 of the third fixed lens 27 and a plurality of portions of the frame portion 5602 are bulged. It comprises a bulging portion 5604, a locking claw 5606 and a mounting piece 5608 that protrude from the mutually opposing locations of the frame portion 5602.
In the spring means 56, as shown in FIG. 19, the locking claw 5606 is inserted into the locking groove of the left wall 1205C of the second barrel segment 1204, and the mounting piece 5608 is attached to the right wall 1205D via a screw. Each bulging portion 5604 is in elastic contact with a portion near the outer peripheral surface of the front surface 2702 of the third fixed lens 27, and the third fixed lens 27 is in contact with the contact wall 5402.

接着剤注入用孔５４０６，５４０７の断面は、平面部２７１０の幅よりも小さい寸法の幅と、平面部２７１０の長さよりも大きい寸法の長さを有し、接着剤注入用孔５４０６は、平面部２７１０の長さ方向における両端の環状面２７１２の端部に臨むように形成されている。
そして、第３の固定レンズ２７は、ばね手段５６により当て付け面２７０８が当接壁５４０２に当接された状態で、第３の固定レンズ２７の光軸が光学系１０４の光軸に合致されるように位置調整（調芯）がなされ、接着剤注入用孔５４０６，５４０７に注入された接着剤により２つの平面部２７１０が各取り付け壁５４０４にそれぞれ固定されることで配置されている。本実施例では接着剤として紫外線硬化型接着剤を用いている。 The cross sections of the adhesive injection holes 5406 and 5407 have a width that is smaller than the width of the plane portion 2710 and a length that is greater than the length of the plane portion 2710. The adhesive injection hole 5406 is a plane. The portion 2710 is formed so as to face the end portions of the annular surfaces 2712 at both ends in the length direction.
In the third fixed lens 27, the optical axis of the third fixed lens 27 is aligned with the optical axis of the optical system 104 in a state where the abutment surface 2708 is in contact with the contact wall 5402 by the spring means 56. Position adjustment (alignment) is performed as described above, and the two flat portions 2710 are fixed to the respective attachment walls 5404 by the adhesive injected into the adhesive injection holes 5406 and 5407, respectively. In this embodiment, an ultraviolet curable adhesive is used as the adhesive.

以上説明したように本実施例によれば、第３の固定レンズ２７の外周面２７０６は、外周面２７０６の互いに対向する箇所が切り欠かれ互いに平行する平面で形成された２つの平面部２７１０を有し、各平面部２７１０が前壁１２０５Ａおよび後壁１２０５Ｂにほぼ平行するように配置されているので、第３分割筐体１２０４の前後方向の厚さを短縮し、撮像装置の小型化を図る上で有利となる。
また、２つの平面部２７１０が前壁および後壁にほぼ平行するように配置され、各前壁１２０５Ａおよび後壁１２０５Ｂにはそれぞれ接着剤注入用孔５４０６，５４０７が形成され、各接着剤注入用孔５４０６，５４０７の断面は、平面部２７１０の幅よりも小さい寸法の幅と、平面部２７１０の長さよりも大きい寸法の長さからなる大きな形状で形成されているので、接着剤を注入する前にこれら接着剤注入用孔５４０６を利用して第３の固定レンズ２７の光軸調整を簡単に行うことができ、組み立て作業効率を向上し組み立てコストを低減する上で有利となる。
また、第３の固定レンズ２７の位置決めと接着を同一の接着剤注入孔５４１０を用いて行なうため、鏡筒１２に設ける孔が少なくて済み、鏡筒１２の小型化および強度向上を図る上で有利である。
また、本実施例では、当接壁５４０２とばね手段５６によって第３の固定レンズ２７を保持しているので、適宜治具により接着剤注入用孔５４０６，５４０７から第３の固定レンズ２７の光軸調整を行った後、前記の治具を取り出しても第３の固定レンズ２７は光軸調整された状態に保持され、したがって、組み立て作業効率をより一層向上する上で有利となる。 As described above, according to the present embodiment, the outer peripheral surface 2706 of the third fixed lens 27 includes the two plane portions 2710 formed by planes parallel to each other by cutting away portions of the outer peripheral surface 2706 that face each other. And each flat surface portion 2710 is arranged so as to be substantially parallel to the front wall 1205A and the rear wall 1205B. Therefore, the thickness of the third divided housing 1204 in the front-rear direction is shortened, and the imaging device is downsized. This is advantageous.
The two flat portions 2710 are arranged so as to be substantially parallel to the front wall and the rear wall, and adhesive injection holes 5406 and 5407 are formed in the front wall 1205A and the rear wall 1205B, respectively. The cross sections of the holes 5406 and 5407 are formed in a large shape having a width smaller than the width of the flat portion 2710 and a length larger than the length of the flat portion 2710. Therefore, before the adhesive is injected, In addition, the optical axis of the third fixed lens 27 can be easily adjusted using these adhesive injection holes 5406, which is advantageous in improving the assembly work efficiency and reducing the assembly cost.
Further, since the positioning and adhesion of the third fixed lens 27 are performed using the same adhesive injection hole 5410, the number of holes provided in the lens barrel 12 can be reduced, and the size and strength of the lens barrel 12 can be reduced. It is advantageous.
In the present embodiment, since the third fixed lens 27 is held by the abutment wall 5402 and the spring means 56, the light of the third fixed lens 27 is appropriately transmitted from the adhesive injection holes 5406 and 5407 by a jig. After the axis adjustment, the third fixed lens 27 is held in the state where the optical axis is adjusted even if the jig is taken out, which is advantageous in further improving the assembly work efficiency.

上記の第３の固定レンズ２７の取り付け構造によれば以下に説明するような治具を用いることで極めて簡単に光軸調整ならびに接着剤による固定を行うことが可能となる。
次にこのような取り付け方法について詳細に説明する。
図２２に示すように、まず、第３の固定レンズ２７を第１レンズ２７Ａが上方に臨み第２レンズ２７Ｂが下方（撮像素子１２８）に臨んだ状態でレンズ取付部５４に挿入し、２つの平面部２７１０を前壁１４０５Ａ、後壁１４０５Ｂとほぼ平行させ、第３の固定レンズ２７の当て付け面２７０８を当接部５４０２に臨ませる。
次いで、図２３に示すように、ばね手段５６をレンズ取付部５４に挿入し、係止爪５６０６を左壁１２０５Ｃの係止溝に挿入し、取付片５６０８を右壁１２０５Ｄにねじを介して取着し、これにより、各膨出部５６０４を第３の固定レンズ２７の前面２７０２の外周面寄り箇所に弾接させ、ばね手段５６によって第３の固定レンズ２７の当て付け面２７０８を当接部５４０２に当て付ける方向に付勢させ、当て付け面２７０８を当接部５４０２に当接させた状態とし、この状態を保持させる。 According to the mounting structure of the third fixed lens 27, it is possible to adjust the optical axis and fix with an adhesive very easily by using a jig as described below.
Next, such an attachment method will be described in detail.
As shown in FIG. 22, first, the third fixed lens 27 is inserted into the lens mounting portion 54 with the first lens 27A facing upward and the second lens 27B facing downward (imaging device 128). The flat portion 2710 is made substantially parallel to the front wall 1405A and the rear wall 1405B, and the abutting surface 2708 of the third fixed lens 27 faces the contact portion 5402.
Next, as shown in FIG. 23, the spring means 56 is inserted into the lens mounting portion 54, the locking claw 5606 is inserted into the locking groove of the left wall 1205C, and the mounting piece 5608 is attached to the right wall 1205D via a screw. As a result, each bulging portion 5604 is brought into elastic contact with a position near the outer peripheral surface of the front surface 2702 of the third fixed lens 27, and the contact surface 2708 of the third fixed lens 27 is contacted by the spring means 56. The abutting surface 2708 is abutted against the abutting portion 5402, and this state is maintained.

次に、図２４、図２５に示すように、前壁用治具８０を接着剤注入用孔５４０６に挿入し、また、後壁用治具８２を接着剤注入用孔５４０７に挿入する。
前壁用治具８０は、接着剤注入用孔５４０６に挿入されるように、断面が接着剤注入用孔５４０６よりも小さい矩形状部分を有し、その先端は２つの傾斜面８００２からなる溝８００４を有し、各傾斜面８００２は平面部２７１０の両端部に位置する環状面２７１２箇所に当接可能に形成されている。
後壁用治具８２は、接着剤注入用孔５４０７に挿入されるように、断面が接着剤注入用孔５４０７よりも小さい矩形状部分を有し、その先端面８２０２は平面部の長さよりも大きな長さの平面で形成されている。
前壁用治具８０が接着剤注入用孔５４０６に挿入されることで、２つの傾斜面８００２が環状面２７１２箇所に当接し、後壁用治具８２が接着剤注入用孔５４０７に挿入されることで、先端面８２０２が平面部２７１０に当接する。これにより、第３の固定レンズ２７はその光軸を中心として回転不能に把持されることになる。
そして、これら前壁用治具８０と後壁用治具８２により、第３の固定レンズ２７を、ばね手段５６の付勢力に抗して、この第３の固定レンズ２７の光軸と直交する平面内において互いに直交するＸ軸方向（第２鏡筒分割体１２０４の左右方向）と、Ｙ軸方向（第２鏡筒分割体１２０４の前後方向）とに移動することによって光軸調整を行う。すなわち、第３の固定レンズ２７を左右方向および前後方向に平行移動することによって光軸調整を行う。
本実施例の第３の固定レンズ２７は、互いに対向する箇所に２つの平面部２７１０を備えており、第３の固定レンズ２７の光軸を通り２つの平面部２７１０を結ぶ方向の寸法に対して、２つの平面部２７１０を結ぶ方向と直交する方向の寸法は大きい。そのため、第３の固定レンズ２７を動かして光軸調整を行う際に、前壁１４０５Ａや後壁１４０５Ｂに当接して第３の固定レンズ２７が損傷しないように、また、有効径の範囲内に平面部２７１０が入らないように、第３の固定レンズ２７を光軸回りに回転させることはせず、第３の固定レンズ２７を左右方向および前後方向に平行移動することによって光軸調整を行う。
前壁用治具８０と後壁用治具８２は、Ｘ軸方向およびＹ軸方向に沿って高い精度で移動するように不図示のマイクロメータヘッドや自動ステージなどの従来公知の様々な駆動機構（例えばＸＹテーブルなど）に連結されており、該駆動機構を操作することによって前壁用治具８０と後壁用治具８２がＸ軸方向およびＹ軸方向に沿って平行移動されるように構成されている。
したがって、前壁用治具８０と後壁用治具８２が動かされることにより第３の固定レンズ２７がＸ軸方向、Ｙ軸方向に沿って移動され、光学系１０４の光軸に第３の固定レンズ２７の光軸が合致される。この状態で、第３の固定レンズ２７の２つの平面部２７１０は前壁１４０５Ａ、後壁１４０５Ｂとそれぞれ平行している。
なお、第３の固定レンズ２７の位置決めは、対物レンズ１４によって所定のテストチャート（テストパターン）を捉え、光学系１０４によって前記テストチャートを撮像素子１２８に結像させ、その撮像素子１２８によって得られた画像データをディスプレイに表示させ、該表示された画像データを視認しつつ行なわれる。 Next, as shown in FIGS. 24 and 25, the front wall jig 80 is inserted into the adhesive injection hole 5406, and the rear wall jig 82 is inserted into the adhesive injection hole 5407.
The front wall jig 80 has a rectangular portion whose cross section is smaller than that of the adhesive injection hole 5406 so that the front wall jig 80 is inserted into the adhesive injection hole 5406, and the tip thereof is a groove formed by two inclined surfaces 8002. 8004, and each inclined surface 8002 is formed so as to be able to come into contact with an annular surface 2712 located at both ends of the flat surface portion 2710.
The rear wall jig 82 has a rectangular portion whose cross section is smaller than that of the adhesive injection hole 5407 so that the rear wall jig 82 is inserted into the adhesive injection hole 5407, and its front end surface 8202 is longer than the length of the flat portion. It is formed of a large length plane.
By inserting the front wall jig 80 into the adhesive injection hole 5406, the two inclined surfaces 8002 abut on the annular surface 2712, and the rear wall jig 82 is inserted into the adhesive injection hole 5407. As a result, the distal end surface 8202 comes into contact with the flat portion 2710. As a result, the third fixed lens 27 is gripped so as not to rotate about the optical axis.
The front wall jig 80 and the rear wall jig 82 cause the third fixed lens 27 to be orthogonal to the optical axis of the third fixed lens 27 against the urging force of the spring means 56. Optical axis adjustment is performed by moving in the X-axis direction (the left-right direction of the second barrel segment 1204) and the Y-axis direction (front-rear direction of the second barrel segment 1204) orthogonal to each other in the plane. That is, the optical axis is adjusted by translating the third fixed lens 27 in the left-right direction and the front-rear direction.
The third fixed lens 27 according to the present embodiment includes two plane portions 2710 at locations facing each other, and the dimension in the direction of connecting the two plane portions 2710 through the optical axis of the third fixed lens 27. Thus, the dimension in the direction orthogonal to the direction connecting the two flat portions 2710 is large. Therefore, when the optical axis is adjusted by moving the third fixed lens 27, the third fixed lens 27 is not damaged by coming into contact with the front wall 1405A or the rear wall 1405B, and is within the effective diameter range. The third fixed lens 27 is not rotated around the optical axis so that the flat portion 2710 does not enter, but the optical axis is adjusted by translating the third fixed lens 27 in the left-right direction and the front-rear direction. .
The front wall jig 80 and the rear wall jig 82 are conventionally known various drive mechanisms such as a micrometer head and an automatic stage (not shown) so as to move with high accuracy along the X-axis direction and the Y-axis direction. The front wall jig 80 and the rear wall jig 82 are translated along the X-axis direction and the Y-axis direction by operating the drive mechanism. It is configured.
Accordingly, when the front wall jig 80 and the rear wall jig 82 are moved, the third fixed lens 27 is moved along the X-axis direction and the Y-axis direction, and the third axis is moved to the optical axis of the optical system 104. The optical axis of the fixed lens 27 is matched. In this state, the two flat portions 2710 of the third fixed lens 27 are parallel to the front wall 1405A and the rear wall 1405B, respectively.
The positioning of the third fixed lens 27 is obtained by capturing a predetermined test chart (test pattern) with the objective lens 14, forming an image of the test chart on the image sensor 128 with the optical system 104, and the image sensor 128. The image data is displayed on the display, and the displayed image data is viewed.

このようにして第３の固定レンズ２７の光軸が光学系１０４の光軸と合致されたならば、前壁用治具８０と後壁用治具８２を接着剤注入用孔５４０６，５４０７から抜去する。
そして、前壁用治具８０と後壁用治具８２を接着剤注入用孔５４０６，５４０７から抜去しても、第３の固定レンズ２７はばね手段５６により当接壁５４０２に当て付けられているため、光軸調整された状態が保持される。
前壁用治具８０と後壁用治具８２を接着剤注入用孔５４０６，５４０７から抜去した後、接着剤注入用孔５４０６，５４０７から接着剤注入用のシリンジを挿入し、図２２に示すように、シリンジから紫外線硬化型接着剤Ｓを、少なくとも各平面部２７１０の部分と各接着剤注入用孔５４０６，５４０７の部分とにわたり注入する。
そして、紫外線を紫外線硬化型接着剤Ｓに照射することで紫外線硬化型接着剤を硬化させ、これにより第３の固定レンズ２７をレンズ取付部５４に取着する。
なお、接着剤注入用孔５４０６，５４０７の外側から各紫外線硬化型接着剤Ｓに対して同時に紫外線を照射した場合には、双方の紫外線が第３の固定レンズ２７を透過するため、各紫外線硬化型接着剤Ｓにまんべんなく照射されることになり硬化時間を短縮する上で有利となる。 When the optical axis of the third fixed lens 27 is matched with the optical axis of the optical system 104 in this way, the front wall jig 80 and the rear wall jig 82 are removed from the adhesive injection holes 5406 and 5407. Remove.
Even if the front wall jig 80 and the rear wall jig 82 are removed from the adhesive injection holes 5406 and 5407, the third fixed lens 27 is applied to the contact wall 5402 by the spring means 56. Therefore, the optical axis adjusted state is maintained.
The front wall jig 80 and the rear wall jig 82 are removed from the adhesive injection holes 5406 and 5407, and then an adhesive injection syringe is inserted through the adhesive injection holes 5406 and 5407, as shown in FIG. As described above, the ultraviolet curable adhesive S is injected from the syringe over at least the portions of the flat portions 2710 and the portions of the adhesive injection holes 5406 and 5407.
Then, the ultraviolet curable adhesive is cured by irradiating the ultraviolet curable adhesive S with ultraviolet rays, whereby the third fixed lens 27 is attached to the lens mounting portion 54.
When ultraviolet rays are simultaneously irradiated to the respective ultraviolet curable adhesives S from the outside of the adhesive injection holes 5406 and 5407, both ultraviolet rays pass through the third fixed lens 27, and thus each ultraviolet ray is cured. The mold adhesive S is evenly irradiated, which is advantageous in shortening the curing time.

上述の取り付け方法によれば、第３の固定レンズ２７の位置決めと接着を同一の接着剤注入孔５４１０を用いて行なえるため、鏡筒１２に設ける孔が少なくて済み、鏡筒１２の小型化および強度向上を図る上で有利である。
また、当接壁とばね手段によって第３の固定レンズ２７を保持しているので、適宜治具により接着剤注入用孔５４０６，５４０７から第３の固定レンズ２７の光軸調整を行った後、前記の治具を取り出しても第３の固定レンズ２７は光軸調整された状態に保持され、したがって、組み立て作業効率をより一層向上する上で有利となる。
また、光軸調整の際、互いに対向する２つの接着剤注入用孔５４０６，５４０７から互いに対向する第３の固定レンズ２７の箇所に前壁用治具８０と後壁用治具８２を当て付けるので、前壁用治具８０と後壁用治具８２により第３の固定レンズ２７を回転させることなく平行移動でき、光軸調整の際の第３の固定レンズ２７の損傷を防止でき、また、有効径の範囲内に平面部２７１０が入ることを防止できる。 According to the mounting method described above, the third fixed lens 27 can be positioned and bonded by using the same adhesive injection hole 5410. Therefore, the number of holes provided in the lens barrel 12 can be reduced, and the size of the lens barrel 12 can be reduced. Further, it is advantageous for improving the strength.
In addition, since the third fixed lens 27 is held by the contact wall and the spring means, the optical axis of the third fixed lens 27 is adjusted from the adhesive injection holes 5406 and 5407 with an appropriate jig. Even if the jig is taken out, the third fixed lens 27 is held in a state in which the optical axis is adjusted. Therefore, it is advantageous in further improving the assembly work efficiency.
Further, when adjusting the optical axis, the front wall jig 80 and the rear wall jig 82 are applied to the position of the third fixed lens 27 facing each other from the two adhesive injection holes 5406 and 5407 facing each other. Therefore, the third fixed lens 27 can be translated without rotating by the front wall jig 80 and the rear wall jig 82, and the third fixed lens 27 can be prevented from being damaged during the optical axis adjustment. Further, it is possible to prevent the flat portion 2710 from entering the effective diameter range.

次に実施例２について説明する。
実施例２が実施例１と異なるのは、接着剤注入用孔の形状と前壁用治具８０と後壁用治具８２の形状である。
図２６は、実施例２における治具によって第３の固定レンズ群２６を把持した状態を示す平面図である。以下では実施例１と同様の部分および部材には同一の符号を付して説明する。
図２６に示すように、前壁１２０５Ａの接着剤注入用孔５４０６は、平面部２７１０の長さ方向に間隔をおいて２つ設けられ、それらの間に中間壁１２３０が介在している。
各接着剤注入用孔５４０６は、平面部２７１０の長さ方向の端部およびこの端部に接続する環状面２７１２の端部に臨むように形成されている。
後壁１２０５Ｂの接着剤注入用孔５４０７も同様に中間壁１２３２を介在させて２つ設けられている。
前壁用治具８０の先部には２つの先端部８００６が設けられ、各先端部８００６には実施例１と同様の傾斜面８００２がそれぞれ形成されている。
後壁用治具８２の先部には２つの先端部８２０６が設けられ、各先端部８２０６には実施例１と同様の先端面８２０２がそれぞれ形成されている。
このような実施例２においても実施例１と同様の作用効果を奏することは無論のこと、実施例２では、中間壁１２３０，１２３２を設けたので、前壁１４０５Ａおよび後壁１４０５Ｂの強度を向上させる上で有利となる。 Next, Example 2 will be described.
The second embodiment differs from the first embodiment in the shape of the adhesive injection hole and the shapes of the front wall jig 80 and the rear wall jig 82.
FIG. 26 is a plan view illustrating a state in which the third fixed lens group 26 is gripped by the jig according to the second embodiment. In the following description, the same reference numerals are given to the same parts and members as in the first embodiment.
As shown in FIG. 26, two adhesive injection holes 5406 in the front wall 1205A are provided at an interval in the length direction of the flat portion 2710, and an intermediate wall 1230 is interposed therebetween.
Each adhesive injection hole 5406 is formed so as to face the end portion of the flat portion 2710 in the length direction and the end portion of the annular surface 2712 connected to the end portion.
Similarly, two adhesive injection holes 5407 in the rear wall 1205B are provided with an intermediate wall 1232 interposed therebetween.
Two front end portions 8006 are provided at the front portion of the front wall jig 80, and inclined surfaces 8002 similar to those of the first embodiment are formed at the respective front end portions 8006.
Two front end portions 8206 are provided at the front portion of the rear wall jig 82, and front end surfaces 8202 similar to those of the first embodiment are formed on the respective front end portions 8206.
Needless to say, the second embodiment provides the same effects as the first embodiment. In the second embodiment, since the intermediate walls 1230 and 1232 are provided, the strength of the front wall 1405A and the rear wall 1405B is improved. This is advantageous.

次に実施例３について説明する。
実施例３は実施例２の変形例であり、治具の２つの先端部の間に接着剤注入用のシリンジを配設したものである。
図２７は、実施例３における治具によって第３の固定レンズ群２６を把持した状態を示す斜視図である。
前壁用治具８０の先部は、実施例２と同様に平面部２７１０の長さ方向に間隔をおいた２つの先端部８００６と、これら２つの先端部８００６の間に設けられた凹部８０１０と、先端部８００６と凹部８０１０とにわたって設けられた切り欠き８００８とで構成され、各先端部８００６には実施例１と同様の傾斜面８００２がそれぞれ形成されている。
後壁用治具８２の先部も、前壁用治具８０と同様に、２つの先端部８２０６と、これら２つの先端部８２０６の間に設けられた凹部８２１０と、先端部８００６と凹部８０１０とにわたって設けられた切り欠き（不図示）とで構成され、各先端部８００６には実施例１と同様の平坦な先端面（不図示）がそれぞれ形成されている。
前壁用治具８０の凹部８０１０と、後壁用治具８２の凹部８２１０にはそれぞれ接着剤注入用のシリンジ９０、９２が配置されている。 Next, Example 3 will be described.
Example 3 is a modification of Example 2, in which a syringe for injecting adhesive is disposed between two tip portions of a jig.
FIG. 27 is a perspective view illustrating a state in which the third fixed lens group 26 is gripped by the jig according to the third embodiment.
As in the second embodiment, the front wall jig 80 has two front end portions 8006 spaced in the length direction of the flat surface portion 2710 and a concave portion 8010 provided between the two front end portions 8006. And a notch 8008 provided across the distal end portion 8006 and the concave portion 8010, and each distal end portion 8006 is formed with an inclined surface 8002 similar to that of the first embodiment.
Similarly to the front wall jig 80, the front part of the rear wall jig 82 also has two front end parts 8206, a concave part 8210 provided between the two front end parts 8206, a front end part 8006, and a concave part 8010. And each tip portion 8006 has a flat tip surface (not shown) similar to that of the first embodiment.
Syringes 90 and 92 for injecting adhesive are respectively disposed in the recess 8010 of the front wall jig 80 and the recess 8210 of the rear wall jig 82.

このように構成された前壁用治具８０および後壁用治具８２を、実施例１と同様に構成された第２鏡筒分割体１４０４のレンズ取付部５４に対して用いることによって、以下に説明するように、第３の固定レンズ２７の光軸調整および取り付けを行う。
第３の固定レンズ２７の光軸調整は、前壁用治具８０を接着剤注入用孔５４０６に挿入して各傾斜面８００２を環状面２７１２箇所に当接させ、後壁用治具８２を接着剤注入用孔５４０７に挿入して先端面８２０２を平面部２７１０に当接させ、前壁用治具８０と後壁用治具８２により、第３の固定レンズ２７を、ばね手段５６の付勢力に抗して、この第３の固定レンズ２７の光軸と直交する平面内において互いに直交するＸ軸方向（第２鏡筒分割体１２０４の左右方向）と、Ｙ軸方向（第２鏡筒分割体１２０４の前後方向）とに移動することによって行う。
また、第３の固定レンズ２７とレンズ取付部５４の取着は、前壁用治具８０と後壁用治具８２を接着剤注入用孔５４０６，５４０７に挿入した状態で、シリンジ９０を前壁用治具８０の凹部８０１０を介して接着剤注入用孔５４０６に挿入し、シリンジ９０から紫外線硬化型接着剤を、少なくとも平面部２７１０の部分と接着剤注入用孔５４０６部分とにわたり注入する。また、シリンジ９２を後壁用治具８２の凹部８２１０を介して接着剤注入用孔５４０７に挿入し、シリンジ９２から紫外線硬化型接着剤を、少なくとも平面部２７１０の部分と接着剤注入用孔５４０７部分とにわたり注入し、紫外線を紫外線硬化型接着剤に照射することで紫外線硬化型接着剤を硬化させることで行う。
このような実施例３においても実施例１と同様の作用効果を奏することは無論のこと、実施例３では、前壁用治具８０と後壁用治具８２を接着剤注入用孔５４０６，５４０７に挿入した状態で、接着剤の注入を行うことができるため、作業時間を短縮してコストを削減する上で有利となる。 By using the front wall jig 80 and the rear wall jig 82 thus configured for the lens mounting portion 54 of the second barrel segment 1404 configured in the same manner as in the first embodiment, As will be described below, the optical axis of the third fixed lens 27 is adjusted and attached.
To adjust the optical axis of the third fixed lens 27, the front wall jig 80 is inserted into the adhesive injection hole 5406, the inclined surfaces 8002 are brought into contact with the annular surface 2712, and the rear wall jig 82 is moved. The tip surface 8202 is inserted into the adhesive injection hole 5407 and brought into contact with the flat portion 2710, and the third fixed lens 27 is attached to the spring means 56 by the front wall jig 80 and the rear wall jig 82. In the plane perpendicular to the optical axis of the third fixed lens 27 against the force, the X-axis direction (the left-right direction of the second barrel segment 1204) and the Y-axis direction (second barrel) This is performed by moving the divided body 1204 in the front-rear direction.
In addition, the third fixed lens 27 and the lens mounting portion 54 are attached in such a manner that the front wall jig 80 and the rear wall jig 82 are inserted into the adhesive injection holes 5406 and 5407 and the syringe 90 is moved forward. It is inserted into the adhesive injection hole 5406 through the concave portion 8010 of the wall jig 80, and an ultraviolet curable adhesive is injected from the syringe 90 over at least the flat portion 2710 portion and the adhesive injection hole 5406 portion. Further, the syringe 92 is inserted into the adhesive injection hole 5407 through the concave portion 8210 of the rear wall jig 82, and at least the portion of the flat portion 2710 and the adhesive injection hole 5407 are filled with the ultraviolet curable adhesive from the syringe 92. It is performed by injecting over the portion and irradiating the ultraviolet curable adhesive with ultraviolet rays to cure the ultraviolet curable adhesive.
Needless to say, in the third embodiment, the same effects as in the first embodiment can be obtained. In the third embodiment, the front wall jig 80 and the rear wall jig 82 are bonded to the adhesive injection holes 5406, Since the adhesive can be injected in the state of being inserted into 5407, it is advantageous in reducing the working time and cost.

また、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 this embodiment, a digital still camera is exemplified as the image pickup apparatus. However, the present invention can naturally be applied to an image pickup apparatus 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 the front. レンズ鏡筒１０を後方の下方から見た斜視図である。It is the perspective view which looked at the lens barrel 10 from the lower back. レンズ鏡筒１０の正面図である。2 is a front view of the lens barrel 10. FIG. レンズ鏡筒１０の背面図である。2 is a rear view of the lens barrel 10. FIG. （Ａ）は図８のＡ矢視図、（Ｂ）は図８のＢ矢視図である。(A) is an A arrow view of FIG. 8, (B) is an B arrow view of FIG. （Ｃ）は図８のＣ矢視図、（Ｄ）は図８のＤ矢視図である。(C) is a C arrow view of FIG. 8, (D) is a D arrow view of FIG. 図６のＡＡ線断面図である。It is AA sectional view taken on the line of FIG. 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. 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の分解斜視図である。FIG. 10 is an exploded perspective view of a second barrel segment 1204. 第２鏡筒分割体１４０４の正面図である。It is a front view of the 2nd lens barrel division body 1404. FIG. 図１７のＡ矢視図である。It is A arrow line view of FIG. 図１７のＡＡ線断面図である。It is AA sectional view taken on the line of FIG. 図１７のＢＢ線断面図である。It is BB sectional drawing of FIG. 図１７のＣＣ線断面図である。It is CC sectional view taken on the line of FIG. 第３の固定レンズ群２６とレンズ取付部５４の位置関係を示す説明図である。It is explanatory drawing which shows the positional relationship of the 3rd fixed lens group 26 and the lens attaching part 54. FIG. 図２２のＡＡ線断面図である。It is AA sectional view taken on the line of FIG. 治具によって第３の固定レンズ群２６を把持した状態を示す平面図である。It is a top view which shows the state which hold | gripped the 3rd fixed lens group 26 with the jig | tool. 治具によって第３の固定レンズ群２６を把持した状態を示す斜視図である。It is a perspective view which shows the state which hold | gripped the 3rd fixed lens group 26 with the jig | tool. 実施例２における治具によって第３の固定レンズ群２６を把持した状態を示す平面図である。6 is a plan view showing a state where a third fixed lens group 26 is held by a jig in Embodiment 2. FIG. 実施例３における治具によって第３の固定レンズ群２６を把持した状態を示す斜視図である。6 is a perspective view showing a state in which a third fixed lens group 26 is held by a jig in Embodiment 3. FIG.

符号の説明Explanation of symbols

１００……撮像装置、１０４……光学系、１２８……撮像素子、１０……レンズ鏡筒、１２……鏡筒、５４……レンズ取付部、２７……第３の固定レンズ、２７０２……前面、２７０４……背面、２７０６……外周面、２７０８……当て付け面、２７１０……平面部、２７１２……環状面、５４０２……当接壁、５４０４……取り付け壁、５４０６，５４０７……接着剤注入用孔、５６……ばね手段。   DESCRIPTION OF SYMBOLS 100 ... Imaging device, 104 ... Optical system, 128 ... Imaging element, 10 ... Lens barrel, 12 ... Lens barrel, 54 ... Lens mounting part, 27 ... 3rd fixed lens, 2702 ... Front surface, 2704... Back surface, 2706... Outer surface, 2708... Abutting surface, 2710. Adhesive injection hole, 56... Spring means.

Claims (13)

鏡筒の内部に設けられた撮像素子と、
前記鏡筒の内部で被写体像を前記撮像素子に導く光学系とを備え、
前記光学系は、前記鏡筒の内部のレンズ取付部に固定された固定レンズを有するレンズ鏡筒であって、
前記固定レンズは、厚さ方向の両端に位置する前面および背面と、これら前面および背面を接続する外周面と、前記固定レンズの光軸と直交する面上を延在する当て付け面とを備え、
前記外周面は、互いに対向し互いに平行する平面で形成された２つの平面部と、前記２つの平面部の両端をそれぞれ接続する２つの環状面とを有し、
前記レンズ取付部は、前記当て付け面に当接可能な当接壁と、前記固定レンズの前面または背面の一方の外周面寄り箇所に弾接し前記当て付け面を前記当接壁に当接させるばね手段と、前記各平面部との間に隙間をあけて各平面部にそれぞれ臨むように設けられた２つの取り付け壁と、前記各取り付け壁に前記鏡筒の内部と外部とを貫通し前記鏡筒の内部において前記平面部に臨むようにそれぞれ設けられた接着剤注入用孔とを備え、
前記固定レンズは、前記ばね手段により前記当て付け面が前記当接壁に当接された状態で前記接着剤注入用孔から注入された接着剤により前記２つの平面部が前記各取り付け壁にそれぞれ平行した状態で固定されている、
ことを特徴とするレンズ鏡筒。 An image sensor provided inside the lens barrel;
An optical system for guiding a subject image to the image sensor inside the lens barrel;
The optical system is a lens barrel having a fixed lens fixed to a lens mounting portion inside the barrel,
The fixed lens includes a front surface and a back surface positioned at both ends in the thickness direction, an outer peripheral surface connecting the front surface and the back surface, and an abutting surface extending on a surface orthogonal to the optical axis of the fixed lens. ,
The outer peripheral surface has two plane portions formed by planes facing each other and parallel to each other, and two annular surfaces respectively connecting both ends of the two plane portions,
The lens mounting portion is in contact with the abutting wall that can abut against the abutting surface and one of the front and rear surfaces of the fixed lens that is close to the outer peripheral surface, and abuts the abutting surface against the abutting wall. Two attachment walls provided to face each planar portion with a gap between the spring means and each planar portion, and the interior and exterior of the lens barrel penetrate through each attachment wall. An adhesive injection hole provided so as to face the flat portion inside the lens barrel;
In the fixed lens, the two flat portions are respectively attached to the mounting walls by the adhesive injected from the adhesive injection hole in a state where the abutting surface is in contact with the contact wall by the spring means. Fixed in a parallel state,
A lens barrel characterized by that. 前記平面部は、前記固定レンズの厚さ方向に沿った幅と、前記幅と直交する方向に延在する長さとを有し、前記接着剤注入用孔の断面は、前記平面部の幅よりも小さい寸法の幅と、前記平面部の長さよりも大きい寸法の長さを有していることを特徴とする請求項１記載のレンズ鏡筒。   The planar portion has a width along the thickness direction of the fixed lens and a length extending in a direction orthogonal to the width, and the cross section of the adhesive injection hole is smaller than the width of the planar portion. The lens barrel according to claim 1, wherein the lens barrel has a width of a smaller dimension and a length of a dimension larger than the length of the planar portion. 前記平面部は、前記固定レンズの厚さ方向に沿った幅と、前記幅と直交する方向に延在する長さとを有し、前記平面部の長さ方向における両端と前記環状面の端部とが接続され、前記接着剤注入用孔の断面は前記平面部の長さよりも大きい寸法の長さを有し、前記接着剤注入用孔は、前記平面部の長さ方向における両端の前記環状面の端部に臨むように形成されていることを特徴とする請求項１記載のレンズ鏡筒。   The flat portion has a width along the thickness direction of the fixed lens and a length extending in a direction orthogonal to the width, and both ends in the length direction of the flat portion and an end portion of the annular surface And the cross-section of the adhesive injection hole has a length larger than the length of the flat portion, and the adhesive injection hole has the annular shape at both ends in the length direction of the flat portion. The lens barrel according to claim 1, wherein the lens barrel is formed so as to face an end of the surface. 前記平面部は、前記固定レンズの厚さ方向に沿った幅と、前記幅と直交する方向に延在する長さとを有し、前記接着剤注入用孔は、前記平面部の長さ方向に間隔をおいて２つ設けられていることを特徴とする請求項１記載のレンズ鏡筒。   The flat portion has a width along the thickness direction of the fixed lens and a length extending in a direction perpendicular to the width, and the adhesive injection hole extends in the length direction of the flat portion. 2. The lens barrel according to claim 1, wherein two lens barrels are provided at intervals. 前記平面部は、前記固定レンズの厚さ方向に沿った幅と、前記幅と直交する方向に延在する長さとを有し、前記接着剤注入用孔は、前記平面部の長さ方向に間隔をおいて２つ設けられ、各接着剤注入用孔は、前記平面部の長さ方向の端部およびこの端部に接続する前記環状面の端部に臨むように形成されていることを特徴とする請求項１記載のレンズ鏡筒。   The flat portion has a width along the thickness direction of the fixed lens and a length extending in a direction perpendicular to the width, and the adhesive injection hole extends in the length direction of the flat portion. It is provided that two holes are provided at intervals, and each adhesive injection hole is formed so as to face the end portion in the length direction of the flat portion and the end portion of the annular surface connected to the end portion. The lens barrel according to claim 1, wherein 前記環状面は、前記固定レンズの光軸を中心とした円筒面で形成されていることを特徴とする請求項１記載のレンズ鏡筒。   The lens barrel according to claim 1, wherein the annular surface is a cylindrical surface centered on an optical axis of the fixed lens. 前記２つの平面部は、前記固定レンズの光軸を通る仮想の平面に対して直交する平面上を延在していることを特徴とする請求項１記載のレンズ鏡筒。   The lens barrel according to claim 1, wherein the two plane portions extend on a plane orthogonal to a virtual plane passing through an optical axis of the fixed lens. 鏡筒は互いに平行して対向する２組の平坦な外壁により形成され、その内部に前記固定レンズよりも大きい輪郭の矩形の収容空間を有し、前記２つの取り付け壁は、前記２組の外壁のうちの１組の外壁の部分により構成されていることを特徴とする請求項１記載のレンズ鏡筒。   The lens barrel is formed by two sets of flat outer walls facing each other in parallel, and has a rectangular accommodating space having a contour larger than that of the fixed lens, and the two mounting walls are the two sets of outer walls. 2. The lens barrel according to claim 1, wherein the lens barrel is constituted by a pair of outer wall portions. 前記当接壁と前記ばね手段は、前記固定レンズの厚さ方向に間隔をおいて設けられ、前記接着剤注入用孔はそれら当接壁とばね手段との間に位置する前記取り付け壁の箇所に形成されていることを特徴とする請求項１記載のレンズ鏡筒。   The abutment wall and the spring means are provided at an interval in the thickness direction of the fixed lens, and the adhesive injection hole is located on the mounting wall located between the abutment wall and the spring means. The lens barrel according to claim 1, wherein the lens barrel is formed as follows. 前記固定レンズは、直径の大きい第１レンズと、前記第１レンズよりも直径の小さい第２レンズとが貼り合わせて構成され、前記平面部および環状面は前記第１レンズの外周面に形成されている請求項１記載のレンズ鏡筒。   The fixed lens is configured by bonding a first lens having a large diameter and a second lens having a smaller diameter than the first lens, and the planar portion and the annular surface are formed on an outer peripheral surface of the first lens. The lens barrel according to claim 1. 前記固定レンズは、直径の大きい第１レンズと、前記第１レンズよりも直径の小さい第２レンズとが貼り合わせて構成され、前記当て付け面は、前記第２レンズの半径方向の外側に露出する前記第１レンズの前面部分または背面部分で構成されている請求項１記載のレンズ鏡筒。   The fixed lens is configured by bonding a first lens having a large diameter and a second lens having a smaller diameter than the first lens, and the abutting surface is exposed to the outside in the radial direction of the second lens. The lens barrel according to claim 1, wherein the lens barrel includes a front surface portion or a back surface portion of the first lens. 鏡筒の内部に設けられた撮像素子と、
前記鏡筒の内部で被写体像を前記撮像素子に導く光学系とを備え、
前記光学系は、前記鏡筒の内部のレンズ取付部に固定された固定レンズを有するレンズ鏡筒の製造方法であって、
前記固定レンズは、厚さ方向の両端に位置する前面および背面と、これら前面および背面を接続する外周面と、前記固定レンズの光軸と直交する面上を延在する当て付け面とを備え、
前記外周面は、互いに対向し互いに平行する平面で形成された２つの平面部と、前記２つの平面部の両端をそれぞれ接続する２つの環状面とを有し、
前記レンズ取付部に、前記当て付け面に当接可能な当接壁と、前記固定レンズの前面または背面の一方の外周面寄り箇所に弾接し前記当て付け面を前記当接壁に当接させるばね手段と、前記各平面部との間に隙間をあけて各平面部にそれぞれ臨む２つの取り付け壁と、前記各取り付け壁に前記鏡筒の内部と外部とを貫通し前記鏡筒の内部において前記平面部に臨む２つの接着剤注入用孔とを設けておき、
前記固定レンズを、前記ばね手段により前記当て付け面を前記当接壁に当接させた状態とし、
２つの接着剤注入用孔のうちの一方の接着剤注入用孔から第１の治具を挿入してその先端を前記平面部に当て付ける共に、２つの接着剤注入用孔のうちの他方の接着剤注入用孔から第２の治具を挿入してその先端を前記平面部の両端の環状面にそれぞれ当て付け、
前記第１の治具と第２の治具により、各平面部が２つの取り付け壁に対して平行状態を維持するように前記ばね手段の付勢力に抗して前記固定レンズを平行移動させて前記固定レンズの光軸調整を行い、
前記光軸調整の後、２つの接着剤注入用孔からそれぞれ接着剤を注入し、この接着剤により前記固定レンズを前記レンズ取り付け部に取着するようにした、
ことを特徴とするレンズ鏡筒の製造方法。 An image sensor provided inside the lens barrel;
An optical system for guiding a subject image to the image sensor inside the lens barrel;
The optical system is a method of manufacturing a lens barrel having a fixed lens fixed to a lens mounting portion inside the barrel,
The fixed lens includes a front surface and a back surface positioned at both ends in the thickness direction, an outer peripheral surface connecting the front surface and the back surface, and an abutting surface extending on a surface orthogonal to the optical axis of the fixed lens. ,
The outer peripheral surface has two plane portions formed by planes facing each other and parallel to each other, and two annular surfaces respectively connecting both ends of the two plane portions,
The lens mounting portion is in contact with the abutment wall that can abut against the abutment surface, and is elastically brought into contact with the abutment wall at a location near one of the front and back surfaces of the fixed lens. Two attachment walls that face each plane portion with a gap between the spring means and each plane portion, and the inside and outside of the lens barrel pass through each attachment wall inside the lens barrel. Two adhesive injection holes facing the flat portion are provided,
The fixed lens is in a state in which the abutting surface is brought into contact with the contact wall by the spring means,
The first jig is inserted from one of the two adhesive injection holes and the tip of the first jig is applied to the flat portion, and the other of the two adhesive injection holes is inserted. Insert the second jig from the adhesive injection hole and apply the tips to the annular surfaces at both ends of the flat part,
By the first jig and the second jig, the fixed lens is moved in parallel against the biasing force of the spring means so that each plane portion maintains a parallel state with respect to the two mounting walls. Adjust the optical axis of the fixed lens,
After the optical axis adjustment, an adhesive was injected from each of the two adhesive injection holes, and the fixed lens was attached to the lens mounting portion with the adhesive.
A method for manufacturing a lens barrel, comprising: 鏡筒の内部に設けられた撮像素子と、
前記鏡筒の内部で被写体像を前記撮像素子に導く光学系とを備え、
前記光学系は、前記鏡筒の内部のレンズ取付部に固定された固定レンズを有するレンズ鏡筒を備える撮像装置であって、
前記固定レンズは、厚さ方向の両端に位置する前面および背面と、これら前面および背面を接続する外周面と、前記固定レンズの光軸と直交する面上を延在する当て付け面とを備え、
前記外周面は、互いに対向し互いに平行する平面で形成された２つの平面部と、前記２つの平面部の両端をそれぞれ接続する２つの環状面とを有し、
前記レンズ取付部は、前記当て付け面に当接可能な当接壁と、前記固定レンズの前面または背面の一方の外周面寄り箇所に弾接し前記当て付け面を前記当接壁に当接させるばね手段と、前記各平面部との間に隙間をあけて各平面部にそれぞれ臨むように設けられた２つの取り付け壁と、前記各取り付け壁に前記鏡筒の内部と外部とを貫通し前記鏡筒の内部において前記平面部に臨むようにそれぞれ設けられた接着剤注入用孔とを備え、
前記固定レンズは、前記ばね手段により前記当て付け面が前記当接壁に当接された状態で前記接着剤注入用孔から注入された接着剤により前記２つの平面部が前記各取り付け壁にそれぞれ平行した状態で固定されている、
ことを特徴とする撮像装置。 An image sensor provided inside the lens barrel;
An optical system for guiding a subject image to the image sensor inside the lens barrel;
The optical system is an imaging device including a lens barrel having a fixed lens fixed to a lens mounting portion inside the barrel,
The fixed lens includes a front surface and a back surface positioned at both ends in the thickness direction, an outer peripheral surface connecting the front surface and the back surface, and an abutting surface extending on a surface orthogonal to the optical axis of the fixed lens. ,
The outer peripheral surface has two plane portions formed by planes facing each other and parallel to each other, and two annular surfaces respectively connecting both ends of the two plane portions,
The lens mounting portion is in contact with the abutting wall that can abut against the abutting surface and one of the front and rear surfaces of the fixed lens that is close to the outer peripheral surface, and abuts the abutting surface against the abutting wall. Two attachment walls provided so as to face each planar portion with a gap between the spring means and each planar portion, and through each of the attachment walls through the inside and the outside of the barrel An adhesive injection hole provided so as to face the flat portion inside the lens barrel;
In the fixed lens, the two flat portions are respectively attached to the mounting walls by the adhesive injected from the adhesive injection hole in a state where the abutting surface is in contact with the contact wall by the spring means. Fixed in a parallel state,
An imaging apparatus characterized by that.
JP2004320094A 2004-11-04 2004-11-04 Lens barrel, imaging device, and manufacturing method thereof Expired - Fee Related JP4863040B2 (en)

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