JP2015028546A - Prevention against rattling of moving lens barrel in zoom operation - Google Patents

Prevention against rattling of moving lens barrel in zoom operation Download PDF

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JP2015028546A
JP2015028546A JP2013158003A JP2013158003A JP2015028546A JP 2015028546 A JP2015028546 A JP 2015028546A JP 2013158003 A JP2013158003 A JP 2013158003A JP 2013158003 A JP2013158003 A JP 2013158003A JP 2015028546 A JP2015028546 A JP 2015028546A
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roller
groove
lens barrel
shape
width
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一雄 長田
Kazuo Osada
一雄 長田
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Canon Inc
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Canon Inc
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Abstract

PROBLEM TO BE SOLVED: To solve the problem that since it is difficult for a conventional zoom mechanism using a cam and a roller to process a conventional cam groove and a straight advance groove to the same size with a width which is exactly equal to the diameter of the roll, a tolerance is therefore set so as to suppress variance in size within an assumption range, but an optical system which has high optical sensitivity has its optical performance affected by rattling.SOLUTION: (1) A roller has an outer shape formed by combining together a circular roller having a circular outer shape and a roller in a long circle shape which are used as a driven member for a lead groove or cam groove, and the roller is fixed while decreasing the angle of a long circle part by rotation to the width of the cam groove to an extent that there is no influence of rattling on performance. (2) An outer peripheral shape of the long circle part of the roller is a polygonal shape obtained by approximating a long circle with a straight line. (3) The outer peripheral shape of the long circle part of the roller comprises a plurality of long circle shapes and a part in contact with a straight advance groove is a circumferential contact.

Description

本発明は、一眼レフなどのカメラ用レンズで用いるズーム機構にレンズ鏡筒内の一部のレンズ群を移動させるカム機構に関するものである。 The present invention relates to a cam mechanism for moving a part of a lens group in a lens barrel to a zoom mechanism used in a camera lens such as a single lens reflex camera.

従来、一眼レフなどのカメラ用レンズでは、写る範囲を調節するために、カムによってレンズ鏡筒内の一部のレンズ群を移動させる機構が一般的に用いられている(特許文献1参照)。   Conventionally, in a camera lens such as a single-lens reflex camera, a mechanism for moving a part of a lens group in a lens barrel by a cam is generally used to adjust a captured range (see Patent Document 1).

これらのレンズ鏡筒はカム環等のカム溝と、ガイドする役目の固定鏡筒の直進溝との間に摺動体としてコロを用いることが多く、コロに連結された移動鏡筒および中のレンズ群を移動させることによって写る範囲を調節している。   These lens barrels often use a roller as a sliding body between a cam groove such as a cam ring and a straight groove of a fixed barrel that serves as a guide. The range of the image is adjusted by moving the group.

一眼レフ以外では、液晶プロジェクターの投射レンズの投写する像のサイズを変更する機構にも使われる。   Other than single-lens reflex cameras, it is also used for a mechanism that changes the size of the image projected by the projection lens of a liquid crystal projector.

以下に背景技術を説明する。図14は一眼レフ等のレンズ鏡筒の構成図で図15は直進溝とカム溝、コロの関係を示した図である。図16は図15の直進溝とカム溝とコロ部の拡大図でガタ9を左右に分け、左側ガタを902、右側ガタを903とした。   The background art will be described below. FIG. 14 is a configuration diagram of a lens barrel such as a single-lens reflex camera, and FIG. 15 is a diagram showing the relationship between a straight groove, a cam groove, and a roller. FIG. 16 is an enlarged view of the rectilinear groove, the cam groove, and the roller portion of FIG. 15, wherein the backlash 9 is divided into left and right, the left backlash is 902, and the right backlash is 903.

これによりコロ5および連結された移動鏡筒4が504方向にガタついてしまうことを表した図である。   This is a diagram showing that the roller 5 and the connected movable barrel 4 are loose in the direction of 504.

コロ5が図15中の右側に片寄せられた状態のコロ502と直進溝101の間に左側ガタ902が発生する。   A left play 902 is generated between the roller 502 and the straight groove 101 in a state where the roller 5 is shifted to the right side in FIG.

その左側ガタ902により、コロ502はカム溝301に沿ってコロ503の位置までガタつく。   The left side play 902 causes the roller 502 to play along the cam groove 301 to the position of the roller 503.

このガタが想定していた量よりも大きいと、コロ5がとりついている移動鏡筒4も想定以上に504の方向に変動する。すると、504のスラスト方向成分505の距離分、移動鏡筒4の前後にある 光学部品(ガラス/レンズ)との空気間隔が想定以上に変化したり、移動鏡筒4が想定以上に傾いたりしてピントがボケるなど性能の低下を招く場合が生じる。   If the amount of play is larger than the expected amount, the movable lens barrel 4 to which the roller 5 is attached also changes more in the direction of 504 than expected. Then, the air gap between the optical component (glass / lens) in front of and behind the movable lens barrel 4 changes more than expected, or the movable lens barrel 4 tilts more than expected by the distance of the thrust direction component 505 of 504. As a result, the performance may be degraded, such as blurring.

特開2004−45914号公報JP 2004-45914 A

前記従来のカムやコロを用いたズーム機構においては、前記した従来のカム溝と直進溝に加工寸法ガタが存在する。カム溝と直進溝の幅とコロの直径を、まったく同じ寸法に加工することは困難であるために公差を設定して、想定内の範囲の寸法のばらつきに抑えて、ピンボケなどの発生量を最小限にしたい。このための方法として、直径が段階的に数種類用意されているコロの中から溝幅に対してガタつきが少ない直径のコロを選択して使用する方法によりガタつきを最小限にする方法がある。   In the zoom mechanism using the conventional cam or roller, there is a processing dimension backlash in the conventional cam groove and the straight advance groove. Since it is difficult to process the cam groove and straight groove width and roller diameter to exactly the same dimensions, a tolerance is set to suppress variations in dimensions within the expected range and reduce the amount of out-of-focus, etc. I want to minimize it. As a method for this purpose, there is a method of minimizing the backlash by selecting and using a roller having a diameter with a small backlash relative to the groove width from among rollers of several diameters prepared in stages. .

この方法では、最適な直径のコロに交換する手間がかかることや、この手間は時間を消耗し製品の生産数を減らすこととなり単位時間当たりに生産できる数が減るためにレンズ製作の費用を上昇させる原因となる。また、この方法でも、寸法が少し異なる二つの溝幅に合致させることは理屈上不可能である。   With this method, it takes time to replace the roller with the optimal diameter, and this time consumes time and reduces the number of products produced, which increases the cost of lens production because the number that can be produced per unit time decreases. Cause it. Further, even with this method, it is theoretically impossible to match two groove widths having slightly different dimensions.

従来の課題は、このような現状に鑑みたものである。すなわち、(1)一つのコロ部品と、二つのカム機構と写る範囲を調節するためのレンズ群との間のガタを性能に影響しない程度に減らすこと。(2)それに加えて、部品の交換に伴う組み立て時間の長期化による製品自体の製作費用の上昇を抑制することである。   The conventional problem is in view of such a current situation. That is, (1) The backlash between one roller component and the lens group for adjusting the range that is captured by the two cam mechanisms is reduced to an extent that does not affect the performance. (2) In addition, it is to suppress an increase in production cost of the product itself due to the prolonged assembly time accompanying the replacement of parts.

本発明の第1の手段のレンズ鏡筒の構成は、
直進溝およびカム溝に対し従動部材として用いられる円形状の外形を有する円コロと長円形状のコロとを結合した形状の外形を有するコロとする。ここでいう長円とは、長軸を二等分し中点からずれた位置に短軸があっても良く、長軸の中点と短軸の中点が合致していなくても良い。また、多角形の数を増やした曲線近似の物も含む。このコロは直進溝の幅に合うように長円コロ部分の角度を回転させ固定したことを特徴とするレンズ鏡筒。
The configuration of the lens barrel of the first means of the present invention is as follows:
A roller having an outer shape in which a circular roller having a circular outer shape used as a driven member with respect to the rectilinear groove and the cam groove and an elliptical roller are combined. As used herein, the ellipse may be such that the major axis is divided into two equal parts and the minor axis may be at a position shifted from the middle point, and the middle point of the major axis may not coincide with the middle point of the minor axis. Moreover, the thing of the curve approximation which increased the number of polygons is also included. The lens barrel is characterized in that the angle of the oval roller portion is rotated and fixed so as to match the width of the rectilinear groove.

本発明の第2の手段のレンズ鏡筒の構成は、
前記コロは、回転操作を行うための係合手段を有することを特徴とするレンズ鏡筒。
The configuration of the lens barrel of the second means of the present invention is as follows:
The lens barrel includes an engaging means for performing a rotation operation.

本発明の第3の手段のレンズ鏡筒の構成は、
前記コロの長円部分の外周形状は平行な二辺を持つ多角形形状である事を特徴とするレンズ鏡筒。
The configuration of the lens barrel of the third means of the present invention is as follows:
A lens barrel characterized in that the outer peripheral shape of the oval part of the roller is a polygonal shape having two parallel sides.

本発明の第4の手段のレンズ鏡筒の構成は、
前記コロの長円部分の外周形状は長さの異なる長円を重ね合わせた角の取れた多角形形状である事を特徴とするレンズ鏡筒。
The configuration of the lens barrel of the fourth means of the present invention is as follows:
An outer peripheral shape of an oval portion of the roller is a polygonal shape with a corner obtained by superimposing ellipses of different lengths.

本発明の第1の手段の効果は、直進溝とコロの間に生じるガタを性能に影響しない程度に容易に減らせることで高画質を得ることができる。   The effect of the first means of the present invention is that it is possible to obtain high image quality by easily reducing the backlash generated between the straight groove and the roller so as not to affect the performance.

本発明の第2の手段のレンズ鏡筒の効果は、ガタを性能に影響しない程度に減らす作業の時間を短くすることができる。   The effect of the lens barrel of the second means of the present invention can shorten the work time for reducing the backlash to the extent that it does not affect the performance.

本発明の第3の手段のレンズ鏡筒の効果は第2の手段と同様に、ガタを性能に影響しない程度に減らす作業の時間を短くすることができる。   The effect of the lens barrel of the third means of the present invention can shorten the work time for reducing the backlash to the extent that it does not affect the performance, like the second means.

本発明の第4の手段のレンズ鏡筒の効果は第2の手段と同様に、ガタを性能に影響しない程度に減らす作業の時間を短くすることができる。   The effect of the lens barrel of the fourth means of the present invention, like the second means, can shorten the work time for reducing the backlash to the extent that it does not affect the performance.

本発明の実施例1を説明するためのコロの図。The figure of the roller for demonstrating Example 1 of this invention. 本発明の実施例1でガタが性能に影響しない程度に減らすように調整した図。The figure adjusted so that it may reduce in the Example 1 of this invention to the extent that backlash does not affect performance. 本発明の実施例1で図2のコロ部の拡大図。The enlarged view of the roller part of FIG. 2 in Example 1 of this invention. 実施例2を説明するための長円部分を多角形にした多角形コロ7(マーク付)の図Diagram of a polygonal roller 7 (with a mark) in which an oval part is a polygon for explaining the second embodiment. 本発明の実施例2を説明するための図4のコロを組み込んだ状態でガタ取りしたコロ部の拡大図FIG. 4 is an enlarged view of a roller portion that has been loosened in a state where the roller of FIG. 実施例3を説明するための図4の多角形コロ7(マーク付)のすり割り711を回転規制と方向目印を兼ねたすり割り721にした図4 is a diagram in which the slit 711 of the polygonal roller 7 (marked) in FIG. 4 for explaining the third embodiment is replaced with a slot 721 that serves both as a rotation restriction and a direction mark. 実施例4を説明するための同軸多角形のコロで6種類の幅を持ったコロの図Drawing of a roller with six kinds of widths in a coaxial polygon roller for explaining Example 4 実施例5を説明するための同軸多角形のコロで11種類の幅を持ったコロの図Drawing of a roller having eleven kinds of widths in a coaxial polygon roller for explaining the fifth embodiment 実施例6を説明するための長円形状を複数組み合わせ、直進溝に接する部分を円周接点にしたタイプのコロの図A drawing of a roller of a type in which a plurality of oval shapes for explaining Example 6 are combined, and a portion in contact with the straight groove is a circumferential contact 実施例7を説明するための円形コロ部と多角形コロ部の中心を偏心させたコロの図The figure of the roller which decentered the center of the circular roller part and polygon roller part for demonstrating Example 7 実施例7を説明するための固定筒の展開図Exploded view of a fixed cylinder for explaining the seventh embodiment 本発明のコロを取り付けドライバーでビス締めする際のガイドとなる工具のイメージ図Image of tool that serves as a guide when tightening the screw of the present invention with a screwdriver 従来例を説明するためのレンズ鏡筒の構成図Configuration diagram of a lens barrel for explaining a conventional example 従来例図13の直進溝とカム溝、コロの関係を示した図。カム環を回転させると直進溝に沿ってコロが移動することを示した図The figure which showed the relationship between the rectilinear groove of FIG. 13, prior art example, a cam groove, and a roller. Diagram showing that the roller moves along the straight groove when the cam ring is rotated 従来例図14のコロ部の拡大図Conventional Example Enlarged view of the roller section in FIG.

本発明の第1の手段のレンズ鏡筒の構成は、
直進溝およびカム溝に対し従動部材として用いられる円形状の外形を有する円コロと長円形状のコロとを結合した形状の外形を有している。加えて、直進溝の幅に合うように長円コロ部分の角度を回転させ固定したことを特徴とするレンズ鏡筒。
The configuration of the lens barrel of the first means of the present invention is as follows:
It has an outer shape of a shape in which a circular roller having a circular outer shape used as a driven member with respect to the rectilinear groove and the cam groove and an elliptical roller are combined. In addition, a lens barrel characterized in that the angle of the oval roller portion is rotated and fixed so as to match the width of the straight groove.

本発明の第2の手段のレンズ鏡筒の構成は、
前記コロは、回転操作を行うための係合手段を有することを特徴とするレンズ鏡筒。
The configuration of the lens barrel of the second means of the present invention is as follows:
The lens barrel includes an engaging means for performing a rotation operation.

本発明の第3の手段のレンズ鏡筒の構成は、
前記コロの長円部分の外周形状は長円を直線で近似した多角形状である事を特徴とするレンズ鏡筒。
The configuration of the lens barrel of the third means of the present invention is as follows:
A lens barrel characterized in that an outer peripheral shape of an oval portion of the roller is a polygonal shape approximating an oval with a straight line.

本発明の第4の手段のレンズ鏡筒の構成は、
前記コロの長円部分の外周形状は長円形状を複数組み合わせ、直進溝に接する部分を円周接点にした事を特徴とするレンズ鏡筒。
The configuration of the lens barrel of the fourth means of the present invention is as follows:
A lens barrel characterized in that the outer peripheral shape of the oval portion of the roller is a combination of a plurality of oval shapes, and the portion in contact with the straight groove is a circumferential contact.

[実施例1]
本発明の実施例の構成を、図1、図2を用いて説明する。
[Example 1]
The configuration of the embodiment of the present invention will be described with reference to FIGS.

図1は本実施例における光学性能の低下問題を解決するために今回考案した長円段付きコロ6の外観図で円形コロ601と長円コロ602を組み合わせた段付き形状とした。   FIG. 1 is an external view of an elliptical stepped roller 6 devised this time in order to solve the problem of deterioration in optical performance in this embodiment, and a stepped shape in which a circular roller 601 and an elliptical roller 602 are combined.

603はビス止め時の回転規制のすり割りで 751はコロを移動鏡筒に止めるビスが入る穴、 φD1は円形コロの直径 、D2は長円コロの短辺長、 R1およびR2は長軸のそれぞれの長さでR1+R2=長円コロ6の長辺D3となる。   603 is a slot for restricting rotation when screwing, 751 is a hole for a screw to hold the roller in the moving barrel, φD1 is the diameter of the circular roller, D2 is the short side length of the oval roller, R1 and R2 are the long axis In each length, R1 + R2 = long side D3 of the oval roller 6.

図1ではD1とD2が等しい時の状態。R1とR2も等しい時の状態を表す。D1よりもD2が大きくてもよくR1よりもR2が大きくてもよい。   In FIG. 1, the state when D1 and D2 are equal. R1 and R2 also represent the same state. D2 may be greater than D1, and R2 may be greater than R1.

図2はガタを性能に影響しない程度に減らすように調整した図である。円形コロの部分601はカム溝301に係合。長円段付きコロ6を回転させ、長円部分602でガタ902/903を 0に近づけた位置で固定する。それにより、カム溝301に沿ったガタつきが減らせ、空気間隔の変化が性能に影響しない程度に少なくできる。
図3は図2の長円段付きコロ部の拡大図を示す。
FIG. 2 is a diagram adjusted to reduce the backlash to such an extent that it does not affect the performance. The circular roller portion 601 engages with the cam groove 301. The roller 6 with the oval step is rotated, and the backlash 902/903 is fixed at a position close to 0 by the oval portion 602. As a result, the play along the cam groove 301 can be reduced, and can be reduced to such an extent that the change in the air interval does not affect the performance.
FIG. 3 shows an enlarged view of the elliptical stepped roller portion of FIG.

円形コロの部分601はカム溝301に係合。長円段付きコロ6を回転させ、長円部分602でガタ902/903を 0に近づけた適正値に合わせこみコロ止めビス401で締結する。このときの回転方向は左右どちらに回してもよい。回転規制すり割り603に専用工具(図14の801)を取り付け、ビス401を締め付ける際に生じる摩擦による連れまわりを防止しながらビス401を締結する。それにより、カム溝301に沿ったガタつきが減らせ、空気間隔の変化が性能に影響しない程度に少なくすることで光学性能の低下が防げる。   The circular roller portion 601 engages with the cam groove 301. The roller 6 with the ellipse step is rotated, and the ellipse portion 602 is adjusted to an appropriate value in which the backlash 902/903 is close to 0 and fastened with the roller fixing screw 401. The rotation direction at this time may be turned to the left or right. A dedicated tool (801 in FIG. 14) is attached to the rotation restricting slot 603, and the screw 401 is fastened while preventing dragging caused when the screw 401 is fastened. Thereby, the play along the cam groove 301 can be reduced, and the optical performance can be prevented from being deteriorated by reducing the change of the air interval so as not to affect the performance.

[実施例2]
本実施例の多角形コロ7を図4に示す。多角形コロ7は工具による回転規制のすり割り603と方向の目印711を付けた図で、径:D(最小径)に対し右45度 回転で、径:D+0.01mmである。右90度 回転で、径:D+0.02mmである。右135度 回転で、径:D+0.03mmにした形状である。
[Example 2]
A polygonal roller 7 of this embodiment is shown in FIG. The polygonal roller 7 is a figure provided with a rotation restriction slot 603 by a tool and a direction mark 711. The polygon roller 7 rotates 45 degrees to the right with respect to the diameter: D (minimum diameter) and has a diameter: D + 0.01 mm. The rotation is 90 degrees right and the diameter is D + 0.02 mm. It is a shape that is rotated 135 degrees to the right and has a diameter of D + 0.03 mm.

図5のように、このコロを移動鏡筒に固定する際は直進溝に対しコロの角度を決めて固定すればよい。コロの角度の決め方は直進溝幅101の幅に対してガタつきを性能に影響しない程度の幅に決める。   As shown in FIG. 5, when this roller is fixed to the movable lens barrel, the angle of the roller with respect to the rectilinear groove may be determined and fixed. The method of determining the angle of the roller is determined so as not to affect the performance with respect to the width of the straight groove width 101.

これにより、2つの溝幅とコロの直径により生じてしまうガタつきを減らすことがコロの着脱を伴わず行える。   As a result, it is possible to reduce the looseness caused by the two groove widths and the diameter of the roller without attaching or detaching the roller.

[実施例3]
本実施例の多角形コロ7を図6に示す。図6は図4の多角形コロ7(マーク付)のすり割り711を回転規制と方向目印を兼ねたすり割り721にした図である。
[Example 3]
A polygonal roller 7 of this embodiment is shown in FIG. FIG. 6 is a diagram in which the slit 711 of the polygonal roller 7 (with a mark) in FIG. 4 is replaced with a slot 721 that serves both as a rotation restriction and a direction mark.

同一回転方向にだんだん直径が大きくなるように設定し、基準角度で、径:Dmm(最小径)右45度 回転で、径:D+0.01mmである。右90度 回転で、径:D+0.02mmである。右135度 回転で、径:D+0.03mmという形状である。   The diameter is set so that the diameter gradually increases in the same rotation direction. At the reference angle, the diameter: Dmm (minimum diameter) is rotated 45 degrees right, and the diameter is D + 0.01 mm. The rotation is 90 degrees right and the diameter is D + 0.02 mm. It rotates 135 degrees to the right and has a shape of diameter: D + 0.03 mm.

この場合のメリットは ビス止め時の回転角度を決める際に作業者が目で確認することができる目印を配置してある。   The merit in this case is that there is a mark that can be checked by the operator when deciding the rotation angle when screwing.

コロと直進溝の幅を調節するために、手探りだけではなく、視覚で確認できる目印を付けたことで、調整時間の短縮をすることが可能である。   In order to adjust the width of the roller and the straight groove, the adjustment time can be shortened by adding a mark that can be visually confirmed in addition to groping.

例えば、通常は、直進溝を形成している部品は、成形で製作する場合が多くなっており、この成形で製作した鏡筒の直進溝の幅は、その製作のロット内では、大きなばらつきを生じない場合が多い。このロット内の部品を使っての固定筒の溝幅を組み立てる前に測定する。この幅の測定値に対してガタつきを抑えるべくコロの角度を設定して、レンズユニットに組みつけることで、コロを鏡筒に組み込んでからのコロの回転角度の調整が不要となる。   For example, parts that form a straight groove are usually manufactured by molding, and the width of the straight groove of a lens barrel manufactured by this molding varies greatly within the lot of the manufacturing. It often does not occur. Measure the groove width of the fixed cylinder using the parts in this lot before assembling. By setting the angle of the roller to suppress the rattling with respect to the measured value of this width and assembling it to the lens unit, it is not necessary to adjust the rotation angle of the roller after the roller is incorporated into the lens barrel.

これにより、コロの調整時間が省略でき、レンズの組み立て時間が早くでき、レンズ製作費用を抑制することができる。   Thereby, the adjustment time of the roller can be omitted, the assembly time of the lens can be shortened, and the lens manufacturing cost can be suppressed.

[実施例4]
本実施例の多角形コロ705を図7に示す。多角形コロ705は同軸多角形のコロで7種類の幅を持ったコロである。コロを移動鏡筒に止めるビスが入る穴751があり、回転規制ドライバーが入るすり割りを兼ねた方向指示マーク721が付いている。
[Example 4]
A polygonal roller 705 according to this embodiment is shown in FIG. Polygon roller 705 is a coaxial polygon roller having seven different widths. There is a hole 751 for receiving a screw for fixing the roller to the movable lens barrel, and a direction indication mark 721 also serving as a slot for a rotation restricting driver to enter.

Aは8mmで基準となる寸法で平行な2つの辺の合計の長さは5.56mmである。Bは角度15度時計方向に傾けた位置に固定でき、幅を8.01mmに設定した寸法である。CはAに対し反時計方向に30度傾けた位置に固定でき、幅を8.02mmに設定した寸法である。DはAに対し角度45度時計方向に傾けた位置に固定でき、幅を8.03mmに設定した寸法である。EはAに対し反時計方向に60度傾けた位置に固定でき、幅を8.04mmに設定した寸法である。FはAに対し角度75度時計方向に傾けた位置に固定でき、幅を8.05mmに設定した寸法である。GはAに対し90度傾けた位置に固定でき、幅を8.06mmに設定した寸法である。   A is 8 mm, and the total length of two parallel sides with a reference dimension is 5.56 mm. B is a dimension that can be fixed at a position inclined clockwise by 15 degrees and the width is set to 8.01 mm. C is a dimension that can be fixed at a position tilted 30 degrees counterclockwise with respect to A and has a width set to 8.02 mm. D is a dimension that can be fixed at a position inclined 45 degrees clockwise with respect to A and has a width set to 8.03 mm. E is a dimension that can be fixed at a position tilted 60 degrees counterclockwise with respect to A and has a width set to 8.04 mm. F can be fixed at a position tilted clockwise by 75 degrees with respect to A, and the width is set to 8.05 mm. G is a dimension that can be fixed at a position inclined by 90 degrees with respect to A and has a width set to 8.06 mm.

7種の設定が可能なコロである。このようにコロの周囲に多くの幅を持たせるとともに、コロの角度を調整するための工具802との連結部分を設けることで、より多くの溝幅のばらつきに対応できる。これより安価な製法で製作した鏡筒の精度ばらつきにも対応でき、安価なレンズユニットの製作が可能となる。   It is a roller that can be set in seven types. In this way, by providing a large width around the roller and providing a connecting portion with the tool 802 for adjusting the angle of the roller, it is possible to cope with more variations in the groove width. It is possible to cope with variations in accuracy of a lens barrel manufactured by a less expensive manufacturing method, and it is possible to manufacture an inexpensive lens unit.

[実施例5]
本実施例の多角形コロ706を図8に示す。多角形コロ706は同軸多角形コロで11種類の幅を持ったコロである。実施例4の多角形コロ705と同様に、コロを移動鏡筒に止めるビスが入る穴があり、回転規制ドライバーが入る座グリ穴で方向指示マークが付いている。
[Example 5]
A polygonal roller 706 of this example is shown in FIG. The polygonal roller 706 is a coaxial polygonal roller having eleven types of widths. Similar to the polygonal roller 705 of the fourth embodiment, there is a hole for receiving a screw for fixing the roller to the movable lens barrel, and a direction indication mark is provided at a counterbored hole for receiving a rotation restricting driver.

Aは8mmで基準となる寸法で辺の長さは4.6mmである。Bは角度15度時計方向に傾けた位置に固定され、幅を8.01mmに設定した寸法である。CはさらにBに対し角度15度時計方向に傾けた位置に固定され、幅を8.02mmに設定した寸法である。   A is a standard dimension of 8 mm, and the side length is 4.6 mm. B is a dimension that is fixed at a position tilted by 15 degrees clockwise and the width is set to 8.01 mm. C is a dimension that is further fixed at a position inclined clockwise by 15 degrees with respect to B, and the width is set to 8.02 mm.

DはさらにCに対し角度15度時計方向に傾けた位置に固定され、幅を8.03mmに設定した寸法である。EはさらにDに対し角度15度時計方向に傾けた位置に固定され、幅を8.04mmに設定した寸法である。FはさらにEに対し角度15度時計方向に傾けた位置に固定され、幅を8.05mmに設定した寸法である。GはさらにFに対し角度15度時計方向に傾けた位置に固定され、幅を8.06mmに設定した寸法である。   D is a dimension that is further fixed at a position inclined clockwise by 15 degrees with respect to C, and the width is set to 8.03 mm. E is a dimension that is further fixed at a position inclined clockwise by 15 degrees with respect to D, and the width is set to 8.04 mm. F is a dimension that is fixed at a position that is further inclined clockwise by 15 degrees with respect to E and that the width is set to 8.05 mm. G is a dimension that is further fixed at a position inclined clockwise by 15 degrees with respect to F, and the width is set to 8.06 mm.

HはさらにGに対し角度15度時計方向に傾けた位置に固定され、幅を8.07mmに設定した寸法である。IはさらにHに対し角度15度時計方向に傾けた位置に固定され、幅を8.08mmに設定した寸法である。JはさらにIに対し角度15度時計方向に傾けた位置に固定され、幅を8.09mmに設定した寸法である。KはさらにJに対し角度15度時計方向に傾けた位置に固定され、幅を8.10mmに設定した寸法である。   H is a dimension that is fixed at a position that is further inclined clockwise by 15 degrees with respect to G, and whose width is set to 8.07 mm. I is a dimension that is fixed at a position that is further inclined clockwise by 15 degrees with respect to H and that the width is set to 8.08 mm. J is a dimension that is further fixed at a position tilted clockwise by 15 degrees with respect to I and has a width set to 8.09 mm. K is a dimension that is fixed at a position that is further inclined clockwise by 15 degrees with respect to J, and whose width is set to 8.10 mm.

このようにコロの周囲にさらに多くの幅を持たせるとともに、コロの角度を調整するための工具との連結部分を設けることで、より多くの溝幅のばらつきに対応できる。これより安価な製法で製作した鏡筒の精度ばらつきにも対応でき、安価なレンズユニットの製作が可能となる。   In this way, by providing a larger width around the roller and providing a connecting portion with the tool for adjusting the angle of the roller, it is possible to cope with more variations in the groove width. It is possible to cope with variations in accuracy of a lens barrel manufactured by a less expensive manufacturing method, and it is possible to manufacture an inexpensive lens unit.

[実施例6]
本実施例のコロ707を図9に示す。コロ707は長円形状を組み合わせ、直進溝に接する部分をR接点にしたタイプのコロで4調寸の設定が可能である。図12のAは、基準となる寸法で楕円の長辺方向長さが8mm である。図12のBは、Aに対し角度45度時計方向に傾けた位置に固定され、楕円の長辺方向長さを8.01mmに設定した寸法である。図12のCは、Bに対しさらに角度45度時計方向に傾けた位置に固定され、楕円の長辺方向長さを8.02mmに設定した寸法である。
[Example 6]
A roller 707 of this example is shown in FIG. The roller 707 is a roller of a type in which an oval shape is combined and the portion in contact with the straight groove is an R contact, and can be set to 4 dimensions. In FIG. 12A, the length of the ellipse in the long side direction is 8 mm with a reference dimension. B in FIG. 12 is a dimension that is fixed at a position inclined 45 degrees clockwise with respect to A, and the length of the ellipse in the long side direction is set to 8.01 mm. C in FIG. 12 is a dimension that is fixed at a position that is further inclined 45 degrees clockwise with respect to B, and that the length of the long side of the ellipse is set to 8.02 mm.

図12のDは、Cに対しさらに角度45度時計方向に傾けた位置に固定され、楕円の長辺方向長さを8.03mmに設定した寸法である。それにより、コロ組み込み後に多少角度ズレが発生してもガタが詰まることが無く、コロの位置合わせ精度を緩く設定できることで、不良率の低下と調整時間短縮ができて安価なレンズユニットの製作が可能となる。   D in FIG. 12 is a dimension that is fixed at a position that is further inclined by 45 degrees clockwise with respect to C, and that the length of the ellipse in the long side direction is set to 8.03 mm. As a result, even if there is a slight angle shift after roller assembly, there will be no clogging, and the roller alignment accuracy can be set loosely. It becomes possible.

[実施例7]
本実施例の多角形コロ708を図10に示す。多角形コロ708はA,B二つの幅に対し中心位置を偏心(Bc−Bd=偏心量)させたコロである。直進溝101の幅に合わせ、A,Bの2種の調寸ができるコロである。Aにおいては、Aaで均等に振り分けられた辺と、Ac−Adで中心からの左右の長さが異なる不均等で平行な辺を有する。Bにおいても、Baで均等に振り分けられた辺と、Bc−Bdで中心からの左右の長さが異なる不均等で平行な辺を有する。それにより直進溝101の3本の等分差ズレを性能に影響しない程度に緩和することができる。
[Example 7]
A polygonal roller 708 of this embodiment is shown in FIG. The polygonal roller 708 is a roller whose center position is eccentric (Bc−Bd = eccentric amount) with respect to the two widths A and B. This is a roller capable of adjusting two kinds of dimensions A and B in accordance with the width of the rectilinear groove 101. In A, there are sides equally distributed in Aa and non-uniform and parallel sides in Ac-Ad with different left and right lengths from the center. Also in B, there are sides evenly distributed in Ba and non-uniform and parallel sides in Bc-Bd with different left and right lengths from the center. As a result, the three equal deviations of the rectilinear groove 101 can be reduced to such an extent that the performance is not affected.

図11は固定筒1の展開図で 図10のコロ708を用いて固定筒1の3本の直進溝101に生じた等分差を性能に影響しない程度に緩和させられる図である。図11の中央の直進溝101が基準である。 それに対し左右の直進溝101が等分に配置されていることが望ましいが、寸法公差内で若干ずれることがあり等分差がゼロにはならないことが多い。 また、移動鏡筒4のコロ取り付け部にも等分差の公差が設定されており、直進溝101の等分差ズレと一致しないことが多い。   FIG. 11 is a developed view of the fixed cylinder 1 and is a view in which the equal difference generated in the three rectilinear grooves 101 of the fixed cylinder 1 is relaxed to the extent that the performance is not affected by using the roller 708 of FIG. A straight rectilinear groove 101 in the center of FIG. 11 is a reference. On the other hand, it is desirable that the left and right rectilinear grooves 101 be equally divided, but there may be a slight deviation within the dimensional tolerance, and the equal difference often does not become zero. Further, the tolerance of the equal difference is also set in the roller mounting portion of the movable lens barrel 4 and often does not coincide with the equal deviation of the straight advance groove 101.

左側が基準寸法に対しマイナス、右側が基準寸法に対しプラスしている状態を示す。コロ705を等分差ずれに応じて組み込む。これにより、せっかく溝巾に合わせて設定したコロであっても等分差ずれによって生じる位置ずれによりコロが直進溝101内で片方に寄せられてガタが詰まることを防止でき、不良率の低下が可能となる。   The left side shows a minus state with respect to the reference dimension, and the right side shows a state that it is plus with respect to the reference dimension. Roller 705 is incorporated in accordance with the equal difference. As a result, even if the roller is set according to the groove width, it is possible to prevent the roller from being moved to one side in the rectilinear groove 101 due to the positional shift caused by the equal difference, and the defective rate is reduced. It becomes possible.

1.固定筒
101.直進溝
102.直進溝の左端面
103.直進溝巾
2.ギヤ環
3.カム環
301.カム溝
302.カム環の回転方向
303.カム溝の左端面
304.カム溝巾
4.移動鏡筒
401.コロ止めビス
5.コロ
501.コロの移動方向
504.コロと移動鏡筒のガタつき方向
505.504のスラスト成分距離
6.長円段付きコロ
601.長円段付きコロの円形コロ部
602.長円段付きコロの長円コロ部
603.ビス止め時の回転規制のすり割り
7.多角形コロ(マーク付)
701.多角形コロ(方向性追加)
702.7の多角形部
7703.7の円形部
705.同軸多角形コロ 6調寸タイプ
706.同軸多角形コロ 11調寸タイプ
707.楕円コロを組み合わせたコロ 4調寸タイプ
708.偏心あり辺当りコロ
711.方向の目印
721.ビス止め時の回転規制と目印を兼ねたすり割り
751.コロを移動鏡筒に止めるビスが入る穴
801.専用工具(すり割りタイプ)
802.専用工具(鍵状タイプ)
803. 内部のネジ401を締めるプラスドライバー
9.ガタ
902.直進溝とコロの左側ガタ
903.直進溝とコロの右側ガタ
D1.601の円形コロ部の直径
D2.602の長円コロ部の短径
D3.602の長円コロ部の長径
R1.長軸D3の左側の長さ
R2.長軸D3の右側の長さ
98.モータ
99.モータギヤ
A,B,C,・・・等のアルファベットはそれぞれの寸法
1. Fixed cylinder
101. Straight groove
102. Left end face of straight groove
103. Straight groove width
2. Gear ring
3. Cam ring
301. Cam groove
302. Direction of cam ring rotation
303. Left end face of cam groove
304. Cam groove width
4). Moving barrel
401. Roller set screw
5. Kolo
501. Roller moving direction
504. Shaking direction of roller and moving lens barrel
Thrust component distance of 505.504
6). Roller with oval step
601. Circular roller part of an ellipse stepped roller
602. Ellipse roller part of an ellipse stepped roller
603. Slotting of rotation regulation when screwing
7). Polygon roller (with mark)
701. Polygon roller (additional direction)
702.7 polygon part
7703.7 circular part
705. Coaxial polygon roller 6-size type
706. Coaxial polygon roller 11 sized type
707. Roller combined with elliptical roller 4 size type
708. Eccentric roller per side
711. Direction mark
721. Slotting that also serves as a mark for rotation control when screwing
751. Hole for screw to fix the roller to the moving barrel
801. Special tool (slotted type)
802. Special tool (key type)
803. A Phillips screwdriver to tighten the internal screw 401
9. Rattle
902. Straight groove and left side play of roller 903. Straight groove and right side of roller
The long diameter R1. Length R2 on the left side of the long axis D3. Length of right side of long axis D3 98. motor
99. Motor gear
Alphabet letters such as A, B, C,.

Claims (4)

リード溝またはカム溝に対し従動部材として用いられる円形状の外形を有する円コロと、一部の直径と、それに直交した角度の直径の長さが異なる形状である長円形状のコロとを結合した形状の外形を有し、カム溝の幅に合うように長円コロ部分の角度を回転させ固定したことを特徴とするレンズ鏡筒。   Combines a circular roller with a circular outer shape that is used as a driven member for the lead groove or cam groove, and an elliptical roller that has a partial diameter and a diameter that is different from the perpendicular angle. A lens barrel characterized by having an outer shape of the shape and rotating and fixing the angle of the oval roller portion so as to match the width of the cam groove. 前記コロは、回転操作を行うための係合手段を有することを特徴とする請求項1に記載のレンズ鏡筒。   The lens barrel according to claim 1, wherein the roller includes an engaging unit for performing a rotation operation. 前記コロの長円部分の外周形状は長円を直線で近似しかつ、対抗する二辺が平行である多角形状である事を特徴とする請求項1又は請求項2に記載のレンズ鏡筒。   3. The lens barrel according to claim 1, wherein an outer peripheral shape of the oval portion of the roller is a polygonal shape that approximates the oval by a straight line and has two opposite sides parallel to each other. 前記コロの長円部分の外周形状は長円形状を複数組み合わせ、直進溝に接する部分を円周接点にした事を特徴とする請求項1又は請求項2に記載のレンズ鏡筒。   3. The lens barrel according to claim 1, wherein an outer peripheral shape of the oval portion of the roller is a combination of a plurality of oval shapes, and a portion in contact with the rectilinear groove is a circumferential contact.
JP2013158003A 2013-07-30 2013-07-30 Prevention against rattling of moving lens barrel in zoom operation Pending JP2015028546A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021504769A (en) * 2017-12-01 2021-02-15 コペンハーゲン センサー テクノロジー エー/エス Cam follower and its zoom lens

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021504769A (en) * 2017-12-01 2021-02-15 コペンハーゲン センサー テクノロジー エー/エス Cam follower and its zoom lens
JP7274493B2 (en) 2017-12-01 2023-05-16 コペンハーゲン センサー テクノロジー エー/エス Cam followers and their zoom lenses

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