JP2005092141A - Lens mirror frame, zoom lens barrel, digital camera, and optical apparatus - Google Patents

Lens mirror frame, zoom lens barrel, digital camera, and optical apparatus Download PDF

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JP2005092141A
JP2005092141A JP2003329087A JP2003329087A JP2005092141A JP 2005092141 A JP2005092141 A JP 2005092141A JP 2003329087 A JP2003329087 A JP 2003329087A JP 2003329087 A JP2003329087 A JP 2003329087A JP 2005092141 A JP2005092141 A JP 2005092141A
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lens
lens frame
frame
optical axis
lens barrel
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JP4441224B2 (en
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Shigeru Irisawa
茂 入沢
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Ricoh Co Ltd
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Ricoh Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide; a lens mirror frame which has a plurality of lens units which have a structure of holding lenses by lens frames, built in the direction of an optical axis and allows positions of lenses to be easily adjusted (aligned) in the direction of the optical axis and the radial direction and can be made high-precision and small-sized and has the constitution simplified; a zoom lens barrel; a digital camera; and an optical apparatus. <P>SOLUTION: A lens mirror frame 0 is provided with; a first lens unit A having a first lens frame 5 which holds at least one first lens 1 on the outer diameter side; a second lens frame 10 fixed to the front end part in the direction of the optical axis, of the first lens unit; and a second lens unit B having a second lens 11 which is held by the inner periphery of the second lens frame. The second lens frame is provided with a second lens receiving part 12 which is brought into contact with the outer peripheral part of the second lens to position the second lens in the direction of the optical axis and a rear end expanded part 13 which has the inner periphery brought into contact with the outer periphery of a front end narrowed part 6 of the first lens frame, and the first lens frame is provided with a second lens frame position control part 14 which controls movement in the radial direction of the second lens frame, in the outer periphery of the front end narrowed part, and the second lens frame is fixed to the first lens frame by a fixing means. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明はズームレンズ鏡胴、光学装置、デジタルカメラ等のレンズ支持機構に適用することにより、レンズ光学系の小型化、レンズの位置精度の向上、レンズ調心作業の効率化を図ることができるレンズ鏡枠に関する。   By applying the present invention to a lens support mechanism such as a zoom lens barrel, an optical device, or a digital camera, it is possible to reduce the size of the lens optical system, improve the positional accuracy of the lens, and increase the efficiency of the lens alignment work. It relates to a lens barrel.

光学装置、デジタルカメラ、銀塩カメラ等のレンズ光学系においては、大型化や部品点数の増大や部品構造の複雑化を招くことなく、光軸方向に配置する複数のレンズの光軸方向及び径方向位置を如何に高精度に位置決めしたり、調心できるか、ということが、当該光学機器の性能を左右する重要な要素となっている。また、レンズとレンズ枠との組付け作業の簡略化も生産性を高める上で重要な要素である。従って、レンズ光学系を構成するレンズとレンズ鏡枠との組付け構造については、従来から種々の提案がなされている。例えば、特開平５−１１１６号、特開平５−４０２９４号、特開平５−２１５９５０号、特開平９−２４６６５８号、特開平１１−３５２４３２号公報には、レンズとレンズ枠との位置決め、レンズをレンズ枠によって保持したレンズユニット間の位置決め、固定構造等について種々の提案がなされている。
しかし、何れの公報記載の従来例にあっても、レンズ枠の複雑、大型化、部品間の位置決め作業の繁雑化という問題を有しており、これらの問題点の解決が強く望まれている。
特開平５−１１１６号 特開平５−４０２９４号 特開平５−２１５９５０号 特開平９−２４６６５８号 特開平１１−３５２４３２号 In lens optical systems such as optical devices, digital cameras, and silver halide cameras, the optical axis direction and diameter of a plurality of lenses arranged in the optical axis direction without increasing the size, increasing the number of components, or complicating the component structure How accurately the direction position can be positioned and aligned is an important factor that affects the performance of the optical apparatus. In addition, simplification of the work of assembling the lens and the lens frame is an important factor for increasing productivity. Accordingly, various proposals have been made for the assembly structure of the lens and the lens barrel constituting the lens optical system. For example, JP-A-5-1116, JP-A-5-40294, JP-A-5-215950, JP-A-9-246658 and JP-A-11-352432 disclose positioning of a lens and a lens frame, and a lens. Various proposals have been made regarding positioning, fixing structures, and the like between lens units held by a lens frame.
However, any of the conventional examples described in the publications has a problem that the lens frame is complicated and large, and the positioning work between parts is complicated, and it is strongly desired to solve these problems. .
Japanese Patent Laid-Open No. 5-1116 JP-A-5-40294 JP-A-5-215950 JP-A-9-246658 Japanese Patent Laid-Open No. 11-352432

本発明は上記従来例の不具合を解決するためになされたものであり、レンズ枠によってレンズを保持した構造のレンズユニットを光軸方向に複数組み付けたレンズ鏡枠において、レンズ間の光軸方向及び径方向での位置調整（調心など）を容易に行うことができ、高精度化と小型と構成の簡略化を図ることができるレンズ鏡枠、ズームレンズ鏡胴、デジタルカメラ、及び光学装置を提供することを目的とする。   The present invention has been made to solve the problems of the conventional example described above, and in a lens barrel in which a plurality of lens units each having a structure in which a lens is held by a lens frame is assembled in the optical axis direction, the optical axis direction between the lenses and A lens barrel, a zoom lens barrel, a digital camera, and an optical device that can easily adjust the position in the radial direction (alignment, etc.), can achieve high accuracy, small size, and simplified configuration. The purpose is to provide.

上記目的を達成するため、請求項１の発明は、少なくとも一つの第１レンズを外径側において保持する第１レンズ枠を有した第１レンズユニットと、この第１レンズユニットの光軸方向前端部に固定された第２レンズ枠、及びこの第２レンズ枠の内周により保持された第２レンズを有した第２レンズユニットと、を備えたレンズ鏡枠であって、前記第２レンズ枠は、前記第２レンズの外周部と接することにより第２レンズの光軸方向位置決めを行う第２レンズ受け部と、前記第１レンズ枠の前端小径部の外周と内周にて接する後端拡径部と、を備え、前記第１レンズ枠は、前記前端小径部外周に、第２レンズ枠の径方向への移動を規制する第２レンズ枠位置規制部を、備え、固定手段によって、第２レンズ枠を第１レンズ枠に固定したことを特徴とする。
請求項２の発明は、請求項１において、前記第１レンズ枠の前記第２レンズ枠位置規制部に対して、前記第２レンズ枠の後端拡径部内周が嵌合されることにより、前記第１レンズと前記第２レンズの径方向位置決めがなされることを特徴とする。
請求項３の発明は、請求項１又は２において、前記第２レンズ枠位置規制部と第２レンズの後端拡径部内周との間に、両レンズ枠の径方向への相対移動を許容する隙間を設けたことを特徴とする。
請求項４の発明は、請求項１、２又は３において、前記第２レンズの後面外縁部が前記第１レンズ枠の前端面に当接する部分は、光軸と直交する平面であることを特徴とする。
請求項５の発明は、請求項１、２、３又は４において、前記第１レンズ光軸からその外径側に位置する第１レンズ枠の外周面までの距離は、前記第２レンズの光軸からその外周面までの距離よりも長いことを特徴とする。 In order to achieve the above object, a first lens unit having a first lens frame for holding at least one first lens on the outer diameter side, and a front end in the optical axis direction of the first lens unit. And a second lens unit having a second lens frame fixed to a portion and a second lens unit having a second lens held by the inner periphery of the second lens frame, wherein the second lens frame Includes a second lens receiving portion that positions the second lens in the optical axis direction by contacting the outer peripheral portion of the second lens, and a rear end widening that contacts the outer periphery and inner periphery of the front end small diameter portion of the first lens frame. The first lens frame includes a second lens frame position restricting portion that restricts the movement of the second lens frame in the radial direction on the outer periphery of the small diameter portion of the front end, That two lens frames are fixed to the first lens frame And butterflies.
According to a second aspect of the present invention, in the first aspect, the inner periphery of the rear end enlarged diameter portion of the second lens frame is fitted to the second lens frame position restricting portion of the first lens frame. The first lens and the second lens are positioned in the radial direction.
According to a third aspect of the present invention, in the first or second aspect, the relative movement in the radial direction of both lens frames is allowed between the second lens frame position restricting portion and the inner periphery of the rear end enlarged diameter portion of the second lens. A gap is provided.
According to a fourth aspect of the present invention, in the first, second, or third aspect, the portion of the rear surface outer edge portion of the second lens that contacts the front end surface of the first lens frame is a plane perpendicular to the optical axis. And
According to a fifth aspect of the present invention, in the first, second, third, or fourth aspect, the distance from the first lens optical axis to the outer peripheral surface of the first lens frame positioned on the outer diameter side is the light of the second lens. It is characterized by being longer than the distance from the shaft to its outer peripheral surface.

請求項６の発明は、請求項１乃至５において、前記第２レンズ枠の外周面には、前記第２レンズの外周面を露出させるに足る光軸方向長を有した第１の切欠きを備え、該第１の切欠き内に充填した接着剤により第２レンズ枠に対して第２レンズを固定したことを特徴とする。
請求項７の発明は、請求項１乃至６において、前記第２レンズ枠の外周面には、前記第１レンズ枠の前端小径部外周を露出させるに足る光軸方向長を有した第２の切欠きを備え、該第２の切欠き内に充填した接着剤により第２レンズ枠に対して第１レンズ枠を固定したことを特徴とする。
請求項８の発明は、請求項１乃至７において、前記第１レンズ枠に対する前記第１レンズの位置調整と、前記第２レンズ枠に対する前記第２レンズの位置調整を夫々完了した後で、前記第１レンズ枠に対して第２レンズ枠を固定することにより完成されることを特徴とする。
請求項９の発明は、請求項１乃至８において、固定手段として、光硬化型接着剤を用いたことを特徴とする。
請求項１０の発明に係るズームレンズ鏡胴は、請求項１乃至９のレンズ鏡枠を用いたことを特徴とする。
請求項１１の発明に係るデジタルカメラは、請求項１乃至９のレンズ鏡枠を用いたことを特徴とする。
請求項１２の発明に係る光学装置は、請求項１乃至９のレンズ鏡枠を用いたことを特徴とする。 According to a sixth aspect of the present invention, in the first to fifth aspects, the first notch having a length in the optical axis direction sufficient to expose the outer peripheral surface of the second lens is formed on the outer peripheral surface of the second lens frame. And the second lens is fixed to the second lens frame with an adhesive filled in the first notch.
A seventh aspect of the invention is the second aspect of the first to sixth aspects, wherein the outer peripheral surface of the second lens frame has a length in the optical axis direction sufficient to expose the outer periphery of the small diameter portion of the front end of the first lens frame. A notch is provided, and the first lens frame is fixed to the second lens frame by an adhesive filled in the second notch.
The invention according to claim 8 is the method according to any one of claims 1 to 7, wherein after the position adjustment of the first lens with respect to the first lens frame and the position adjustment of the second lens with respect to the second lens frame are completed, It is completed by fixing the second lens frame to the first lens frame.
A ninth aspect of the invention is characterized in that, in the first to eighth aspects, a photo-curing adhesive is used as the fixing means.
A zoom lens barrel according to a tenth aspect of the invention is characterized in that the lens barrel of the first to ninth aspects is used.
A digital camera according to an eleventh aspect of the invention is characterized in that the lens barrel of the first to ninth aspects is used.
An optical device according to a twelfth aspect of the invention is characterized by using the lens barrel of the first to ninth aspects.

請求項１の発明によれば、間隔環などの部品を用いず、レンズ鏡枠の簡素化とレンズ位置精度の向上を図ることができる。
請求項２の発明によれば、第１レンズと第２レンズの径方向の位置を規制することによりレンズの位置精度を向上することができる。
請求項３の発明によれば、隙間を設けたことにより、第１レンズと第２レンズの径方向の位置ズレが一定量以下に規制でき、レンズ調心作業の効率化とレンズ位置高精度化を図ることができる。
請求項４の発明によれば、第２のレンズの第１レンズ枠に当接する部位は光軸に対し略垂直な平面を有することによりレンズ調心作業の効率化とレンズ光軸方向の高精度化が図れる。
請求項５の発明によれば、レンズの径方向の位置を高精度化することができる。
請求項６の発明によれば、押え部材を用いず、レンズ鏡枠の小型化とレンズ位置精度の向上ができる。第２レンズ前面とレンズ側面に接着剤を塗布でき、レンズ保持強度の向上とレンズ位置精度の向上、またレンズ鏡枠の小型化が可能である。
請求項７の発明によれば、レンズ枠間での接着を可能とし、レンズ保持強度の向上とレンズ鏡枠の小型化が可能である。
請求項８の発明によれば、第１レンズと第２レンズの位置を調整後、第１レンズ枠と第２レンズ枠を固定したことにより光学性能の向上ができる。
請求項９の発明によれば、固定手段は接着剤であることにより固定作業の簡易化とレンズ鏡枠の小型化ができる。
請求項１０、１１、１２の発明によれば、本発明のレンズ鏡枠をズームレンズ鏡胴、デジタルカメラ、光学装置等に適用できる。 According to the first aspect of the present invention, it is possible to simplify the lens barrel and improve the lens position accuracy without using parts such as a spacing ring.
According to the invention of claim 2, the positional accuracy of the lens can be improved by restricting the radial positions of the first lens and the second lens.
According to the invention of claim 3, by providing the gap, the positional deviation in the radial direction between the first lens and the second lens can be regulated to a certain amount or less, and the efficiency of the lens alignment work and the higher accuracy of the lens position are achieved. Can be achieved.
According to the fourth aspect of the present invention, the portion of the second lens that contacts the first lens frame has a plane substantially perpendicular to the optical axis, thereby improving the efficiency of the lens alignment work and high accuracy in the lens optical axis direction. Can be achieved.
According to the invention of claim 5, the position of the lens in the radial direction can be made highly accurate.
According to the sixth aspect of the present invention, the lens barrel can be reduced in size and the lens position accuracy can be improved without using a pressing member. An adhesive can be applied to the front surface and the side surface of the second lens, so that the lens holding strength can be improved, the lens position accuracy can be improved, and the lens barrel can be downsized.
According to the seventh aspect of the present invention, adhesion between the lens frames is possible, and the lens holding strength can be improved and the lens barrel can be reduced in size.
According to the invention of claim 8, the optical performance can be improved by fixing the first lens frame and the second lens frame after adjusting the positions of the first lens and the second lens.
According to the ninth aspect of the present invention, since the fixing means is an adhesive, the fixing operation can be simplified and the lens barrel can be downsized.
According to the tenth, eleventh and twelfth aspects of the present invention, the lens barrel of the present invention can be applied to a zoom lens barrel, a digital camera, an optical device, and the like.

以下、本発明を図面に示した実施の形態により詳細に説明する。
図１は本発明のレンズ鏡枠の縦断面図、図２（ａ）（ｂ）及び（ｃ）はレンズ鏡枠の正面図、Ｘ−Ｘ断面図、及びＹ−Ｙ断面図、図３は図１の外観斜視図である。
本実施形態に係るレンズ鏡枠０は、デジタルカメラの変倍撮影光学系鏡胴を構成するレンズ群の一部を保持する手段である。
レンズ鏡枠０は、少なくとも一つの第１レンズ１（本例では、３つの第１レンズ１ａ、１ｂ、１ｃ）及び、各レンズ１をその外径側において保持する第１レンズ枠５を有した第１レンズユニットＡと、第１レンズユニットＡの光軸方向前端部に固定された第２レンズ枠１０、及びこの第２レンズ枠１０の内周により保持された第２レンズ１１を有した第２レンズユニットＢと、を備えている。
第１レンズ１ａ、１ｂ、１ｃのうちの前端に位置する第１レンズ１ａは、第１レンズ枠５の内周面前部に設けた径方向へ延びる平面としてのレンズ位置決め部７によって前面外縁部を支持されており、前端の第１レンズ１ａの外周は第１レンズ枠５の内周に対して圧入もしくは接着等の固定手段により固定されている。前端の第１レンズ１ａの後方に位置する中間の第１レンズ１ｂは、前端の第１レンズ１ａの背面に密着して接合されると共に、中間の第１レンズ１ｂの外周面は第１レンズ枠５の内周面には非接触状態で離間している。後端の第１レンズ１ｃは、中間の第１レンズ１ｂの背面の外縁部と接触すると共にその外周面を第１レンズ枠５の内周面に対して圧入、接着または熱カシメ等の固定手段により固定されている。
第２レンズ枠１０は、その内周面で、第２レンズ１１の外周部と接することにより第２レンズ１１の光軸方向位置決めを行う第２レンズ受け部１２と、第１レンズ枠５の前端小径部６の外周面（第２レンズ枠位置規制部１４）と内周面にて接する後端拡径部（後端の内径が前方の内径よりも拡径している）１３と、を備える。 Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.
1 is a longitudinal sectional view of a lens barrel of the present invention, FIGS. 2A, 2B, and 2C are a front view of a lens barrel, an XX sectional view, and a YY sectional view, and FIG. It is an external appearance perspective view of FIG.
The lens barrel 0 according to the present embodiment is a means for holding a part of a lens group constituting a variable magnification photographing optical system barrel of a digital camera.
The lens barrel 0 has at least one first lens 1 (in this example, three first lenses 1a, 1b, and 1c) and a first lens frame 5 that holds each lens 1 on its outer diameter side. A first lens unit A, a second lens frame 10 fixed to the front end in the optical axis direction of the first lens unit A, and a second lens 11 held by the inner periphery of the second lens frame 10 2 lens unit B.
The first lens 1 a located at the front end of the first lenses 1 a, 1 b, 1 c has a front outer edge portion by a lens positioning portion 7 as a plane extending in the radial direction provided at the front portion of the inner peripheral surface of the first lens frame 5. The outer periphery of the first lens 1a at the front end is fixed to the inner periphery of the first lens frame 5 by fixing means such as press fitting or adhesion. The intermediate first lens 1b located behind the front end first lens 1a is in close contact with the back surface of the front end first lens 1a and the outer peripheral surface of the intermediate first lens 1b is the first lens frame. 5 is spaced apart in a non-contact state. The first lens 1c at the rear end is in contact with the outer edge of the back surface of the intermediate first lens 1b, and its outer peripheral surface is fixed to the inner peripheral surface of the first lens frame 5 by fixing means such as press fitting, adhesion, or heat caulking. It is fixed by.
The second lens frame 10 has a second lens receiving portion 12 for positioning the second lens 11 in the optical axis direction by contacting the outer peripheral portion of the second lens 11 on the inner peripheral surface thereof, and the front end of the first lens frame 5. A rear end enlarged portion (the inner diameter of the rear end is larger than the inner diameter of the front end) 13 in contact with the outer peripheral surface (second lens frame position restricting portion 14) of the small diameter portion 6 at the inner peripheral surface. .

第１レンズ枠５は、第１レンズ枠５に対する第２レンズ枠１０の径方向への移動を規制する第２レンズ枠位置規制部１４を備えている。
第２レンズ枠１０と第１レンズ枠５との固定は、固定手段（切欠き、接着剤、圧入、かしめ等）によってなされる。
第１レンズ枠５の前端小径部６は、その外径が第１レンズ枠５の他の部位の外径よりも小径の筒状部であり、前端小径部６の外周面に設けた第２レンズ枠位置規制部１４は第２レンズ枠１０の後端拡径部１３の内周面が接することにより、両者は光軸方向にオーバーラップしている。第１レンズ枠５の前端小径部６の外周面（第２レンズ枠位置規制部１４）に対して、後端拡径部１３の内周面が嵌合されることにより、前端の第１レンズ１ａに対する第２レンズ１１の径方向位置決めがなされる。そして、第２レンズ１１の後面外周部１１ａと第１レンズ枠５の前端面５ａが当接した状態で位置決めされる。この際、第２レンズ１１の後面外縁部１１ａを光軸と直交する平面とし、第１レンズ枠５の前端面５ａも同様な平面とすることにより、両者の光軸方向への位置決めが確実、安定化する。
また、第１レンズ枠５の外周面、即ち前端小径部６の外周面（第２レンズ枠位置規制部１４）と、第２レンズ枠１０の後端拡径部１３の内周面との間には両者の径方向位置を微調整するための隙間が形成される。即ち、この隙間は、両レンズ枠５、１０の径方向への相対移動を許容する手段である。また、この隙間の値を一定に規定することにより、第１及び第２レンズ間の径方向位置ずれを一定量以下に規制することができる。 The first lens frame 5 includes a second lens frame position restricting portion 14 that restricts the movement of the second lens frame 10 in the radial direction with respect to the first lens frame 5.
The second lens frame 10 and the first lens frame 5 are fixed by fixing means (notch, adhesive, press-fitting, caulking, etc.).
The front end small diameter portion 6 of the first lens frame 5 is a cylindrical portion whose outer diameter is smaller than the outer diameter of other portions of the first lens frame 5, and is provided on the outer peripheral surface of the front end small diameter portion 6. The lens frame position restricting portion 14 is in contact with the inner peripheral surface of the rear end enlarged diameter portion 13 of the second lens frame 10 so that both overlap in the optical axis direction. By fitting the inner peripheral surface of the rear end enlarged diameter portion 13 to the outer peripheral surface (second lens frame position restricting portion 14) of the front end small diameter portion 6 of the first lens frame 5, the first lens at the front end is fitted. The second lens 11 is positioned in the radial direction with respect to 1a. Then, the positioning is performed in a state where the rear outer peripheral portion 11 a of the second lens 11 and the front end surface 5 a of the first lens frame 5 are in contact with each other. At this time, the rear outer edge portion 11a of the second lens 11 is a plane perpendicular to the optical axis, and the front end surface 5a of the first lens frame 5 is also a similar plane, so that the positioning of both in the optical axis direction is ensured. Stabilize.
Further, between the outer peripheral surface of the first lens frame 5, that is, the outer peripheral surface of the front end small diameter portion 6 (second lens frame position restricting portion 14) and the inner peripheral surface of the rear end enlarged diameter portion 13 of the second lens frame 10. Is formed with a gap for fine adjustment of the radial position of both. In other words, this gap is a means for allowing relative movement of both lens frames 5 and 10 in the radial direction. Further, by defining the value of the gap to be constant, it is possible to regulate the radial position shift between the first and second lenses to a certain amount or less.

次に、第１レンズ１（特に、レンズ１ａ）の光軸位置からその外径側に位置する第１レンズ枠５の外周面までの長さは、第２レンズ１１の光軸からその外周面までの距離（第２レンズの半径方向長）よりも長く設定する。このように構成することにより、各レンズの径方向位置を高精度化することができる。
次に、第２レンズ枠１０に対して第２レンズ１１を固定する手段として接着剤を使用する場合には、第２レンズ枠１０の外周面に第１の切欠き１５を形成する。即ち、第２レンズ枠の外周面には、第２レンズの外周面を露出させるに足る光軸方向長を有した第１の切欠きを周方向に所定のピッチにて複数配置し、第２レンズ枠の外側から第１の切欠き１５内に充填した接着剤（固定手段）により第２レンズ枠１０に対して第２レンズ１１を固定する。このように構成することにより、各レンズの径方向位置合わせを高精度化することができる。
即ち、第２レンズ枠１０は、周方向に所定の等間隔（本例では、１２０度間隔）にて配置されて内外を貫通する第１の切欠き１５としてのレンズ接着穴を複数個備えており、各第１の切欠き１５は第２レンズ枠１０の前端縁から第２レンズの外周面の後端縁に相当する軸方向長を備えている。つまり、第１の切欠き１５は、第２レンズ１１の外周面を、第２レンズ枠１０の対応する内周面に接着すれば足りる長さ、形状を有している。各第１の切欠き１５内に光硬化型接着剤を塗布することにより、第２レンズ１１を接着固定することができる。 Next, the length from the optical axis position of the first lens 1 (particularly, the lens 1a) to the outer peripheral surface of the first lens frame 5 positioned on the outer diameter side is from the optical axis of the second lens 11 to the outer peripheral surface thereof. Is set to be longer than the distance up to (the radial length of the second lens). With this configuration, the radial position of each lens can be made highly accurate.
Next, when an adhesive is used as means for fixing the second lens 11 to the second lens frame 10, the first notch 15 is formed on the outer peripheral surface of the second lens frame 10. That is, a plurality of first notches having a length in the optical axis direction sufficient to expose the outer peripheral surface of the second lens are arranged on the outer peripheral surface of the second lens frame at a predetermined pitch in the circumferential direction. The second lens 11 is fixed to the second lens frame 10 by an adhesive (fixing means) filled in the first notch 15 from the outside of the lens frame. By comprising in this way, radial alignment of each lens can be made highly accurate.
That is, the second lens frame 10 includes a plurality of lens adhesion holes as first notches 15 that are arranged at predetermined equal intervals in the circumferential direction (in this example, at intervals of 120 degrees) and penetrate the inside and outside. Each first notch 15 has an axial length corresponding to the rear end edge of the outer peripheral surface of the second lens from the front end edge of the second lens frame 10. That is, the first notch 15 has a length and a shape that are sufficient if the outer peripheral surface of the second lens 11 is bonded to the corresponding inner peripheral surface of the second lens frame 10. The second lens 11 can be bonded and fixed by applying a photocurable adhesive in each first notch 15.

次に、第２レンズ枠１０に対して第１レンズ枠５を固定する手段として接着剤を使用する場合には、第２レンズ枠１０の外周面に第２の切欠き１６を形成する。即ち、第２レンズ枠１０の外周面には、第１レンズ枠５の前端小径部６の外周面を露出させるに足る光軸方向長を有した第２の切欠き１６を周方向に所定のピッチにて複数配置し、第２レンズ枠の外側から第２の切欠き１６内に充填した接着剤（固定手段）により第２レンズ１０枠に対して第１レンズ枠５を固定する。
即ち、第２レンズ枠１０と第２レンズ１１を接着し一体化した第２レンズユニットＢを、第１レンズ枠５に第１レンズ１を固定した第１レンズユニットＡに固定する際には、調整後に第２レンズ枠１０の外周面よりその内周面に達する第２の切欠き１６より第１レンズ枠５との間に光硬化型接着剤を塗布、充填し硬化することにより行なう。 Next, when an adhesive is used as means for fixing the first lens frame 5 to the second lens frame 10, the second notch 16 is formed on the outer peripheral surface of the second lens frame 10. That is, on the outer peripheral surface of the second lens frame 10, a second notch 16 having a length in the optical axis direction sufficient to expose the outer peripheral surface of the front end small-diameter portion 6 of the first lens frame 5 is predetermined in the circumferential direction. The first lens frame 5 is fixed with respect to the second lens 10 frame by an adhesive (fixing means) arranged in a plurality at a pitch and filled in the second notch 16 from the outside of the second lens frame.
That is, when fixing the second lens unit B in which the second lens frame 10 and the second lens 11 are bonded and integrated to the first lens unit A in which the first lens 1 is fixed to the first lens frame 5, After adjustment, a photo-curing adhesive is applied, filled and cured between the second notch 16 reaching the inner peripheral surface from the outer peripheral surface of the second lens frame 10 and the first lens frame 5.

本発明のレンズ鏡枠の組付け手順としては、第１レンズ枠５に対する第１レンズ１の位置調整と、第２レンズ枠１０に対する第２レンズ１１の位置調整を夫々完了した後で、第１レンズ枠５に対して第２レンズ枠１０を組み付けて固定する。
第２レンズ枠と第２レンズの固定手段、及び第２レンズ枠と第１レンズ枠との固定手段として、光硬化型接着剤を用いてもよいし、それ以外の接着剤を用いても良い。
なお、本発明のレンズ鏡枠は、各種カメラに使用されるズームレンズ鏡胴のレンズ支持機構に用いても良いし、デジタルカメラや光学装置のレンズ支持機構に採用することもできる。 As a procedure for assembling the lens barrel of the present invention, the first lens 1 is adjusted relative to the first lens frame 5 and the second lens 11 is adjusted relative to the second lens frame 10, respectively. The second lens frame 10 is assembled and fixed to the lens frame 5.
As a means for fixing the second lens frame and the second lens and a means for fixing the second lens frame and the first lens frame, a photo-curing adhesive may be used, or other adhesive may be used. .
The lens barrel of the present invention may be used for a lens support mechanism of a zoom lens barrel used for various cameras, or may be used for a lens support mechanism of a digital camera or an optical device.

本発明のレンズ鏡枠の縦断面図。The longitudinal cross-sectional view of the lens barrel of this invention. （ａ）（ｂ）及び（ｃ）はレンズ鏡枠の正面図、Ｘ−Ｘ断面図、及びＹ−Ｙ断面図。(A) (b) And (c) is a front view of a lens barrel, XX sectional view, and YY sectional view. 図１の外観斜視図。The external appearance perspective view of FIG.

符号の説明Explanation of symbols

Ａ 第１レンズユニット、Ｂ 第２レンズユニット、０ レンズ鏡枠、１、１ａ、１ｂ、１ｃ 第１レンズ、５ 第１レンズ枠、６ 前端小径部、７ レンズ位置決め部、１０ 第２レンズ枠、１１ 第２レンズ、１２ 第２レンズ受け部、１３ 後端拡径部、１４ 第２レンズ枠位置規制部、１５ 第２の切欠き、１６ 第２の切欠き。 A first lens unit, B second lens unit, 0 lens barrel, 1, 1a, 1b, 1c first lens, 5 first lens frame, 6 front end small diameter portion, 7 lens positioning portion, 10 second lens frame, DESCRIPTION OF SYMBOLS 11 2nd lens, 12 2nd lens receiving part, 13 Back end enlarged diameter part, 14 2nd lens frame position control part, 15 2nd notch, 16 2nd notch

Claims (12)

少なくとも一つの第１レンズを外径側において保持する第１レンズ枠を有した第１レンズユニットと、この第１レンズユニットの光軸方向前端部に固定された第２レンズ枠、及びこの第２レンズ枠の内周により保持された第２レンズを有した第２レンズユニットと、を備えたレンズ鏡枠であって、
前記第２レンズ枠は、前記第２レンズの外周部と接することにより第２レンズの光軸方向位置決めを行う第２レンズ受け部と、前記第１レンズ枠の前端小径部の外周と内周にて接する後端拡径部と、を備え、
前記第１レンズ枠は、前記前端小径部外周に、第２レンズ枠の径方向への移動を規制する第２レンズ枠位置規制部を、備え、
固定手段によって、第２レンズ枠を第１レンズ枠に固定したことを特徴とするレンズ鏡枠。 A first lens unit having a first lens frame that holds at least one first lens on the outer diameter side, a second lens frame fixed to the front end portion in the optical axis direction of the first lens unit, and the second lens frame A lens barrel having a second lens unit having a second lens held by the inner periphery of the lens frame,
The second lens frame includes a second lens receiving portion that positions the second lens in the optical axis direction by contacting the outer peripheral portion of the second lens, and an outer periphery and an inner periphery of the front end small diameter portion of the first lens frame. A rear end diameter-expanding portion that comes into contact with
The first lens frame includes a second lens frame position restricting portion that restricts movement of the second lens frame in a radial direction on the outer periphery of the small diameter portion of the front end,
A lens barrel characterized in that the second lens frame is fixed to the first lens frame by a fixing means. 前記第１レンズ枠の前記第２レンズ枠位置規制部に対して、前記第２レンズ枠の後端拡径部内周が嵌合されることにより、前記第１レンズと前記第２レンズの径方向位置決めがなされることを特徴とする請求項１に記載のレンズ鏡枠。   The inner circumference of the rear end enlarged portion of the second lens frame is fitted to the second lens frame position restricting portion of the first lens frame, whereby the radial direction of the first lens and the second lens 2. The lens barrel according to claim 1, wherein positioning is performed. 前記第２レンズ枠位置規制部と第２レンズの後端拡径部内周との間に、両レンズ枠の径方向への相対移動を許容する隙間を設けたことを特徴とする請求項１又は２に記載のレンズ鏡枠。   The clearance gap which permits the relative movement to the radial direction of both lens frames was provided between the said 2nd lens frame position control part and the rear end enlarged diameter inner periphery of the 2nd lens, or characterized by the above-mentioned. The lens barrel according to 2. 前記第２レンズの後面外縁部が前記第１レンズ枠の前端面に当接する部分は、光軸と直交する平面であることを特徴とする請求項１、２又は３に記載のレンズ鏡枠。   4. The lens barrel according to claim 1, wherein a portion where the rear outer edge portion of the second lens contacts the front end surface of the first lens frame is a plane orthogonal to the optical axis. 前記第１レンズ光軸からその外径側に位置する第１レンズ枠の外周面までの距離は、前記第２レンズの光軸からその外周面までの距離よりも長いことを特徴とする請求項１、２、３又は４に記載のレンズ鏡枠。   The distance from the optical axis of the first lens to the outer peripheral surface of the first lens frame located on the outer diameter side thereof is longer than the distance from the optical axis of the second lens to the outer peripheral surface thereof. The lens barrel according to 1, 2, 3, or 4. 前記第２レンズ枠の外周面には、前記第２レンズの外周面を露出させるに足る光軸方向長を有した第１の切欠きを備え、該第１の切欠き内に充填した接着剤により第２レンズ枠に対して第２レンズを固定したことを特徴とする請求項１乃至５の何れか一項に記載のレンズ鏡枠。   The outer peripheral surface of the second lens frame is provided with a first notch having a length in the optical axis direction sufficient to expose the outer peripheral surface of the second lens, and the adhesive filled in the first notch The lens barrel according to any one of claims 1 to 5, wherein the second lens is fixed to the second lens frame. 前記第２レンズ枠の外周面には、前記第１レンズ枠の前端小径部外周を露出させるに足る光軸方向長を有した第２の切欠きを備え、該第２の切欠き内に充填した接着剤により第２レンズ枠に対して第１レンズ枠を固定したことを特徴とする請求項１乃至６の何れか一項に記載のレンズ鏡枠。   The outer peripheral surface of the second lens frame is provided with a second notch having a length in the optical axis sufficient to expose the outer periphery of the small diameter portion of the front end of the first lens frame, and the second notch is filled in the second notch The lens barrel according to any one of claims 1 to 6, wherein the first lens frame is fixed to the second lens frame with the adhesive. 前記第１レンズ枠に対する前記第１レンズの位置調整と、前記第２レンズ枠に対する前記第２レンズの位置調整を夫々完了した後で、前記第１レンズ枠に対して第２レンズ枠を固定することにより完成されることを特徴とする請求項１乃至７の何れか一項に記載のレンズ鏡枠。   After completing the position adjustment of the first lens with respect to the first lens frame and the position adjustment of the second lens with respect to the second lens frame, the second lens frame is fixed to the first lens frame. The lens barrel according to claim 1, wherein the lens barrel is completed. 固定手段として、光硬化型接着剤を用いたことを特徴とする請求項１乃至８の何れか一項に記載のレンズ鏡枠。   The lens barrel according to any one of claims 1 to 8, wherein a photocurable adhesive is used as the fixing means. 請求項１乃至９のレンズ鏡枠を用いたことを特徴とするズームレンズ鏡胴。   A zoom lens barrel using the lens barrel of claim 1. 請求項１乃至９のレンズ鏡枠を用いたことを特徴とするデジタルカメラ。   A digital camera using the lens barrel according to claim 1. 請求項１乃至９のレンズ鏡枠を用いたことを特徴とする光学装置。   An optical apparatus using the lens barrel according to claim 1.
JP2003329087A 2003-09-19 2003-09-19 Lens frame, zoom lens barrel, digital camera, and optical apparatus Expired - Fee Related JP4441224B2 (en)

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JP2010281992A (en) * 2009-06-04 2010-12-16 Hitachi Maxell Ltd Lens unit, camera module, and method for manufacturing the lens unit
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JP2020027278A (en) * 2018-08-10 2020-02-20 エーエーシー テクノロジーズ ピーティーイー リミテッド Lens module

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