JP3962470B2 - Lens barrel and camera - Google Patents

Lens barrel and camera Download PDF

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Publication number
JP3962470B2
JP3962470B2 JP1238898A JP1238898A JP3962470B2 JP 3962470 B2 JP3962470 B2 JP 3962470B2 JP 1238898 A JP1238898 A JP 1238898A JP 1238898 A JP1238898 A JP 1238898A JP 3962470 B2 JP3962470 B2 JP 3962470B2
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Japan
Prior art keywords
lens
lens barrel
holder
group
driving mechanism
Prior art date
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Expired - Fee Related
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JP1238898A
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Japanese (ja)
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JPH11212135A (en
Inventor
修一 竹之内
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Canon Inc
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Canon Inc
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Priority to JP1238898A priority Critical patent/JP3962470B2/en
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  • Adjustment Of Camera Lenses (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、レンズ間の光軸の偏心と傾きの調整機構を備えたレンズ鏡筒およびこれを備えたカメラに関するものである。
【0002】
【従来の技術】
2群以上のレンズを有して構成されるレンズ鏡筒では、これらレンズ間の光軸の偏芯と傾きは光学性能に著しい影響を与える場合がある。そこでこれらを調整するために、例えば特開昭58−192004号公報には、レンズ前後群の傾きを調整する機構を備えたレンズ鏡筒が提案されており、実開昭62−110914号公報には、偏芯調整機構を備えたレンズ鏡筒が提案されている。
【0003】
【発明が解決しようとする課題】
しかしながら、例えば沈胴式テレフォトタイプの2群広角ズーム鏡筒の場合に、後群を回転させて偏芯を除去する方法や実開昭62−110914号公報提案の偏芯調整機構を用いて偏芯を取り除く方法は、後群は前群に比べレンズの径が大きく、さらに2群ホルダに視野マスクを一体的に有することがあるために、鏡筒の大型化や光学性能劣化を招く。また、後群に傾き調整機構を設けることも、後群は前群に比べてレンズの径が大きいために鏡筒径の大型化を招く。
【0004】
上記沈胴式テレフォトタイプの2群ズーム鏡筒において、後群に比べ径の小さい前群と鏡筒本体の径方向スペースにシャッター駆動機構やレンズバリア駆動機構、AF駆動機構、手ぶれ防止駆動機構等を配置することによって、沈胴長短縮と鏡筒径の小型化を図ることは可能であるが、前群に設けられた光軸の偏芯と傾きの両方を調整する機構と干渉しないようにシャッター駆動機構等を配置すると、調整機構を持たない鏡筒に比べて径が大きくなっていた。
【0005】
そこで、本発明は、特に前群レンズの光軸の偏芯と傾きを調整する機構を、鏡筒径の大型化を招くことなく配置できるようにしたレンズ鏡筒を提供することを目的とする。
【0006】
【課題を解決するための手段】
上記の目的を達成するために、本発明のレンズ鏡筒は、レンズを保持し、周方向に配置された複数の位置決め軸を有するレンズホルダと、レンズホルダの所定角度毎の回転調整に応じて、複数の位置決め軸のうちいずれかの位置決め軸と係合可能な位置決め穴を有する地板と、レンズホルダを傾動可能に保持するホルダ保持部材と、位置決め穴および位置決め軸の当接位置を支点として、ホルダ保持部材を介してレンズホルダを傾動させることにより、レンズの傾きを調整するための傾き調整機構とを有している。
【0007】
このような構成により、レンズの光軸位置(つまりは他のレンズとの偏心)を調整するためにレンズホルダを回転させても、レンズホルダを傾動可能に保持するホルダ保持部材や、レンズの光軸傾きを調整するための傾き調整機構は回転しないので、シャッター駆動機構、レンズバリア駆動機構、AF駆動機構および手ぶれ防止駆動機構等の鏡筒動作用機構に干渉することがない。このため、レンズホルダと鏡筒本体との間であって、レンズ鏡筒の径方向におけるスペース(余剰スペース)内に鏡筒動作用機構を収納できるようになり、レンズ鏡筒を径方向において小型化することが可能となる。
【0008】
【発明の実施の形態】
(第1実施形態)
図1および図2には、本発明の第1実施形態であるレンズ鏡筒を示している。これらの図において、1は鏡筒であり、天井部1a、傾き調整穴1bおよびカムピン1cを有する、2は浮き防止バネ(請求の範囲にいう傾き調整機構の一部)、3は押さえバネである。4は1群ホルダ支持環(請求の範囲にいうホルダ保持部材)であり、調整ツバ部4aおよび押さえツバ部4bを有する。
【0009】
5は1群ホルダ(請求の範囲にいうレンズホルダ)であり、光軸を中心に同心円上に配置された複数の位置決め軸5aと複数のふれ止めリブ5bとを有する。7はシャッター駆動部、8は傾き調整ねじ(請求の範囲にいう傾き調整機構の一部)である。
【0010】
9は前地板であり、1群ホルダ5の位置決め軸5aと嵌合する位置決め穴9a、逃げ穴9bおよび回転止め9cを有する。
【0011】
10はシャッター駆動部7によって開閉されるシャッター羽根である。11は後地板、12は2群レンズである。13は2群ホルダであり、カムピン13aを有する。
【0012】
14は回転筒であり、鏡筒1と2群ホルダ13とを光軸方向に移動させるためのカム溝14aおよびヘリコイド14bを有する。15は直進筒であり、鏡筒1と2群ホルダ13とを光軸方向に直進可能に支持する。16は固定筒であり、直進筒15を直進可能に支持するとともに、回転筒14のヘリコイド14bと係合するヘリコイド16aを有する。17は回転筒14を駆動する鏡筒駆動機構、18はカメラ本体である。
【0013】
次に、図2を用いて上記各部材の組み込みについて説明する。カメラ本体18は固定筒16を支持している。固定筒16は鏡筒駆動機構17を支持し、直進筒15を直進可能に、回転筒14を回転可能に支持している。固定筒16の内周に設けられたヘリコイド16aと回転筒14の外周に設けられたヘリコイド14bが係合しているため、回転筒14が鏡筒駆動機構17によって回転駆動されると、回転筒14と直進筒15は固定筒16に対して光軸方向に移動する。
【0014】
回転筒14の内周に設けられたカム溝14aには、鏡筒1のカムピン1cと2群ホルダ13のカムピン13aとが嵌合している。また、鏡筒1と2群ホルダ13は直進筒15によって光軸方向に直進可能に支持されている。このため、回転筒14が回転すると、鏡筒1および1群ホルダ5と一体的に動く1群レンズ6と2群ホルダ13に保持される2群レンズ12は光軸回りで回転することなく光軸方向に移動し、ズームと焦点調節とが行われる。
【0015】
前地板9はシャッター駆動部7を固定保持している。シャッター羽根10は前地板9と後地板11の間で回転可能に支持され、前地板9に取り付けられたシャッター駆動部7によって開閉される。
【0016】
上記のように各部品が組み込まれるレンズ鏡筒において撮像性能を満足させるためには、前地板9によって保持され、鏡筒1の移動によって光軸方向に進退する1群レンズ6の光軸と2群ホルダ13の移動によって光軸方向に進退する2群レンズ12の光軸の偏芯と傾きを所定の範囲内とする必要がある。
【0017】
このため、本実施形態のレンズ鏡筒では、まず1群レンズ6および1群ホルダ5を鏡筒1に組込む前に、これらを所定角度ずつ回転させて1群レンズ6の光軸の2群レンズ12の光軸に対する偏芯を所定の範囲に入れる。そして、1群ホルダ5に1群ホルダ支持環4を取り付ける。
【0018】
次に、前地板9に調整ねじ8を取り付け、1群ホルダ支持環4が取り付けられた1群ホルダ5を前地板9に取り付ける。前述したように前地板9には1群ホルダ5の位置決め軸5aと嵌合する位置決め穴9aが設けられているので、位置決め穴9aにて1群ホルダ5の位置決め軸5aの1つを、回転止め9cによってふれ止めリブ5bの1つをそれぞれ支持させる。
【0019】
さらに、前地板9に予めねじ込まれた調整ねじ8に1群ホルダ支持環4の調整ツバ部4aを当接させる。これにより、1群ホルダ5が支持される。
【0020】
ここで、偏芯調整のために1群ホルダ5が所定角度ずつ回転された場合でも、1群ホルダ5に円周方向に等間隔で複数の位置決め軸5aが形成されているので、位置決め穴9aにはこれら位置決め軸5aのうちの1つが嵌合する。同様に、ふれ止めリブ5bも1群ホルダ5の外周上に等間隔で配置されているため、1群ホルダ5が所定角度ずつ回転された場合でも、回転止め9cには常にふれ止めリブ5bの1つが嵌合する。
【0021】
位置決め穴9aに嵌合しなかった残りの位置決め軸5aは、位置決め穴9aより径が大きく深い逃げ穴9b内に挿入されることによって前地板9に干渉しない。 また、傾き調整用の調整ツバ部4aと押さえツバ部4bとが1群ホルダ支持環4に設けられているので、1群ホルダ5が回転された場合でも調整ツバ部4aおよび押さえツバ部4bがシャッター駆動部7に干渉することがない。
【0022】
次に、調整ツバ部4aを付勢する浮き防止バネ2を調整ねじ8上に取り付けるとともに、押さえツバ部4bを付勢する押さえバネ(板バネ)3を押さえツバ部4bに取り付ける。
【0023】
この状態で前地板9を鏡筒1の天井部1aに当接させ、不図示のビスによって鏡筒1に固定する。浮き防止バネ2は天井部1aによって圧縮され、調整ツバ部4aを調整ねじ8のつば部に当接させる。また、押さえバネ3は天井部1aに当接して押さえツバ部4bを光軸方向後方に付勢し、位置決め軸5aの先端を位置決め穴9aの底面に当接させる。
【0024】
ここまで組み立てられたレンズ鏡筒において、鏡筒1の天井部1aに設けられた傾き調整穴1bを通してドライバー等によって調整ねじ8をねじ込んだりゆるめたりすることにより、調整ねじ8と1群ホルダ支持環4の調整ツバ部4aが当接する面の位置(光軸方向位置)が変わり、位置決め穴9aの底面と位置決め軸5aの先端面との当接位置を支点にして1群レンズ6の光軸の傾き調整を行うことができる。
【0025】
このように、本実施形態では、1群ホルダ5の組み込み回転位置を選択することにより、1群レンズ6と2群レンズ群12との光軸の偏芯を調整することが可能である。また、調整ねじ8のねじ込み量を選択することにより、1群ホルダ5(1群レンズ6)の光軸の傾きを調整することができる。しかも、傾き調整のための調整ツバ部4aと押さえツバ部4bとを有する1群ホルダ支持環4を1群ホルダ5と分離したことにより、偏芯調整のために1群ホルダ5を回転させても、1群ホルダ支持環4は回転しない。このため、調整ツバ部4aや押さえツバ部4bが、これらのツバ部4a、4bと同一面内(レンズ鏡筒の光軸と直交する面内)に位置するシャッター駆動部7干渉することがない。したがって、鏡筒1内にシャッター駆動部7を配置ることができるとともに、鏡筒1内に調整ツバ部4aや押さえツバ部4bの回転を許容するスペースを設ける必要がなくなり、レンズ鏡筒全体の小型化を図ることができる。
【0026】
なお、本実施形態では、鏡筒1の内側にシャッター駆動部7を設けた場合について説明したが、本発明は、鏡筒の内側にバリア駆動機構やAF駆動機構、手ぶれ防止駆動機構等を配置した場合にも適用することができる。
【0027】
【発明の効果】
以上説明したように、本発明によれば、レンズの光軸位置(つまりは他のレンズとの偏心)を調整するためにレンズホルダを回転させても、レンズホルダを傾動可能に保持するホルダ保持部材や、レンズの光軸傾きを調整するための傾き調整機構は回転しないので、これらホルダ保持部材や傾き調節機構がシャッター駆動機構、レンズバリア駆動機構、AF駆動機構および手ぶれ防止駆動機構等の鏡筒動作用機構に干渉することがない。このため、レンズホルダと鏡筒本体との間であって、レンズ鏡筒の径方向におけるスペース(余剰スペース)内に鏡筒動作用機構を収納できるようになり、レンズ鏡筒やこれを備えたカメラの小型化(径方向における小型化)を達成することができる。
【図面の簡単な説明】
【図1】本発明の第1実施形態であるレンズ鏡筒の分解斜視図。
【図2】上記レンズ鏡筒の横断面図。
【符号の説明】
1…鏡筒
2…浮き防止バネ
3…押さえバネ
4…1群ホルダ支持環
5…1群ホルダ
6…1群レンズ
7…シャッター駆動部
8…傾き調整ねじ
9…前地板
10…シャッター羽根
11…後地板
12…2群レンズ
13…2群ホルダ
14…回転筒
15…直進筒
16…固定筒
17…鏡筒駆動機構
18…カメラ本体
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lens barrel having a mechanism for adjusting the eccentricity and inclination of an optical axis between lenses, and a camera equipped with the lens barrel.
[0002]
[Prior art]
In a lens barrel configured with two or more groups of lenses, the eccentricity and inclination of the optical axis between these lenses may significantly affect the optical performance. In order to adjust these, for example, Japanese Patent Laid-Open No. 58-192004 proposes a lens barrel having a mechanism for adjusting the tilt of the lens front-rear group, and Japanese Utility Model Laid-Open No. 62-110914. Has proposed a lens barrel having an eccentricity adjusting mechanism.
[0003]
[Problems to be solved by the invention]
However, for example, in the case of a retractable telephoto type two-group wide-angle zoom lens barrel, the eccentricity is removed by rotating the rear group to remove the eccentricity or using the eccentricity adjusting mechanism proposed in Japanese Utility Model Publication No. 62-110914. In the method of removing the lead, the rear group has a larger lens diameter than the front group, and further the field mask may be integrated with the second group holder, resulting in an increase in the size of the lens barrel and deterioration in optical performance. In addition, providing the rear group with an inclination adjusting mechanism also increases the lens barrel diameter because the rear group has a larger lens diameter than the front group.
[0004]
In the retractable telephoto type two-group zoom lens barrel, a shutter driving mechanism, a lens barrier driving mechanism, an AF driving mechanism, an anti-shake driving mechanism, etc. are provided in the radial direction space between the front group and the lens barrel body, which are smaller in diameter than the rear group. It is possible to reduce the retractable length and reduce the lens barrel diameter by arranging the shutter, but the shutter does not interfere with the mechanism that adjusts both the eccentricity and inclination of the optical axis provided in the front group. When the drive mechanism or the like is arranged, the diameter is larger than that of the lens barrel having no adjustment mechanism.
[0005]
Accordingly, an object of the present invention is to provide a lens barrel in which a mechanism for adjusting the eccentricity and inclination of the optical axis of the front lens group can be arranged without causing an increase in the diameter of the lens barrel. .
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a lens barrel of the present invention holds a lens and has a plurality of positioning shafts arranged in the circumferential direction, and according to rotational adjustment for each predetermined angle of the lens holder. The base plate having a positioning hole that can be engaged with any one of the plurality of positioning shafts, the holder holding member that holds the lens holder in a tiltable manner, and the contact positions of the positioning holes and the positioning shaft as fulcrums, by tilting the lens holder via the holder holding member, which possess a tilt adjustment mechanism for adjusting the inclination of the lens.
[0007]
With such a configuration, even if the lens holder is rotated in order to adjust the optical axis position of the lens (that is, the eccentricity with respect to another lens), the holder holding member that holds the lens holder in a tiltable manner or the lens light Since the tilt adjusting mechanism for adjusting the shaft tilt does not rotate , the tilt adjusting mechanism does not interfere with the lens barrel operating mechanism such as the shutter driving mechanism, the lens barrier driving mechanism, the AF driving mechanism, and the camera shake preventing driving mechanism. Therefore, small a between the lens holder and the lens barrel body, able to house the barrel operational mechanism into the space (extra space) in the radial direction of the lens barrel, the lens barrel in the radial direction Can be realized.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
1 and 2 show a lens barrel that is a first embodiment of the present invention. In these drawings, 1 is a lens barrel, has a ceiling portion 1a, an inclination adjusting hole 1b, and a cam pin 1c, 2 is a floating prevention spring (a part of an inclination adjusting mechanism referred to in the claims), and 3 is a presser spring. is there. Reference numeral 4 denotes a first group holder support ring (a holder holding member referred to in the claims), which has an adjustment flange portion 4a and a pressing flange portion 4b.
[0009]
Reference numeral 5 denotes a first group holder (a lens holder in the claims), which has a plurality of positioning shafts 5a and a plurality of anti-slip ribs 5b arranged concentrically around the optical axis. Reference numeral 7 denotes a shutter drive unit, and 8 denotes an inclination adjusting screw (a part of an inclination adjusting mechanism in the claims).
[0010]
Reference numeral 9 denotes a front plate, which includes a positioning hole 9a, a relief hole 9b, and a rotation stopper 9c that are fitted to the positioning shaft 5a of the first group holder 5.
[0011]
Reference numeral 10 denotes a shutter blade that is opened and closed by the shutter driving unit 7. 11 is a backplate, and 12 is a two-group lens. Reference numeral 13 denotes a second group holder having a cam pin 13a.
[0012]
Reference numeral 14 denotes a rotating cylinder having a cam groove 14a and a helicoid 14b for moving the lens barrel 1 and the second group holder 13 in the optical axis direction. Reference numeral 15 denotes a rectilinear cylinder, which supports the lens barrel 1 and the second group holder 13 so as to be able to move straight in the optical axis direction. Reference numeral 16 denotes a fixed cylinder, which has a helicoid 16a that supports the rectilinear cylinder 15 so as to be linearly movable and engages with the helicoid 14b of the rotating cylinder 14. Reference numeral 17 denotes a lens barrel drive mechanism for driving the rotary cylinder 14, and 18 denotes a camera body.
[0013]
Next, the incorporation of each member will be described with reference to FIG. The camera body 18 supports the fixed cylinder 16. The fixed cylinder 16 supports the lens barrel drive mechanism 17, and supports the rectilinear cylinder 15 so as to be linearly movable and the rotating cylinder 14 so as to be rotatable. Since the helicoid 16a provided on the inner periphery of the fixed cylinder 16 and the helicoid 14b provided on the outer periphery of the rotating cylinder 14 are engaged, when the rotating cylinder 14 is rotationally driven by the lens barrel driving mechanism 17, the rotating cylinder 14 and the rectilinear cylinder 15 move in the optical axis direction with respect to the fixed cylinder 16.
[0014]
A cam pin 1 c of the lens barrel 1 and a cam pin 13 a of the second group holder 13 are fitted in a cam groove 14 a provided on the inner periphery of the rotating cylinder 14. The lens barrel 1 and the second group holder 13 are supported by a rectilinear cylinder 15 so as to be linearly movable in the optical axis direction. For this reason, when the rotating cylinder 14 rotates, the first group lens 6 that moves integrally with the lens barrel 1 and the first group holder 5 and the second group lens 12 held by the second group holder 13 do not rotate around the optical axis. Moving in the axial direction, zoom and focus adjustment are performed.
[0015]
The front base plate 9 holds the shutter driving unit 7 fixedly. The shutter blade 10 is rotatably supported between the front base plate 9 and the rear base plate 11 and is opened and closed by a shutter drive unit 7 attached to the front base plate 9.
[0016]
In order to satisfy the imaging performance in the lens barrel in which the respective components are incorporated as described above, the optical axis of the first group lens 6 that is held by the front plate 9 and advances and retracts in the optical axis direction by the movement of the barrel 1 and 2 The eccentricity and inclination of the optical axis of the second group lens 12 that moves forward and backward in the optical axis direction by the movement of the group holder 13 must be within a predetermined range.
[0017]
For this reason, in the lens barrel of the present embodiment, before the first group lens 6 and the first group holder 5 are first assembled into the lens barrel 1, they are rotated by a predetermined angle so that the second group lens on the optical axis of the first group lens 6 is obtained. Eccentricity with respect to 12 optical axes is set within a predetermined range. Then, the first group holder support ring 4 is attached to the first group holder 5.
[0018]
Next, the adjustment screw 8 is attached to the front plate 9, and the first group holder 5 to which the first group holder support ring 4 is attached is attached to the front plate 9. As described above, the front base plate 9 is provided with the positioning hole 9a for fitting with the positioning shaft 5a of the first group holder 5, so that one of the positioning shafts 5a of the first group holder 5 is rotated by the positioning hole 9a. Each of the anti-slip ribs 5b is supported by the stop 9c.
[0019]
Further, the adjustment collar portion 4 a of the first group holder support ring 4 is brought into contact with the adjustment screw 8 screwed into the front base plate 9 in advance. Thereby, the first group holder 5 is supported.
[0020]
Here, even when the first group holder 5 is rotated by a predetermined angle for eccentricity adjustment, a plurality of positioning shafts 5a are formed in the first group holder 5 at equal intervals in the circumferential direction. One of these positioning shafts 5a is fitted into the. Similarly, since the anti-slip ribs 5b are also arranged on the outer periphery of the first group holder 5 at equal intervals, even if the first group holder 5 is rotated by a predetermined angle, the anti-slip ribs 5b are always attached to the anti-rotation 9c. One fits.
[0021]
The remaining positioning shaft 5a that has not been fitted into the positioning hole 9a does not interfere with the front base plate 9 by being inserted into the escape hole 9b having a diameter larger than that of the positioning hole 9a. Further, since the adjustment collar part 4a and the pressure collar part 4b for tilt adjustment are provided on the first group holder support ring 4, the adjustment collar part 4a and the pressure collar part 4b are provided even when the first group holder 5 is rotated. There is no interference with the shutter drive unit 7.
[0022]
Next, the anti-floating spring 2 that urges the adjustment collar portion 4a is attached on the adjustment screw 8, and a pressing spring (plate spring) 3 that urges the pressing flange portion 4b is attached to the pressing flange portion 4b.
[0023]
In this state, the front plate 9 is brought into contact with the ceiling portion 1a of the lens barrel 1, and is fixed to the lens barrel 1 with a screw (not shown). The anti-floating spring 2 is compressed by the ceiling portion 1 a and brings the adjustment flange portion 4 a into contact with the flange portion of the adjustment screw 8. Further, the holding spring 3 abuts against the ceiling portion 1a and urges the holding collar 4b rearward in the optical axis direction so that the tip of the positioning shaft 5a is brought into contact with the bottom surface of the positioning hole 9a.
[0024]
In the lens barrel assembled so far, the adjustment screw 8 and the first group holder support ring are screwed or loosened by a screwdriver or the like through the inclination adjustment hole 1b provided in the ceiling portion 1a of the lens barrel 1. The position (surface in the direction of the optical axis) of the surface where the adjustment collar 4a contacts 4 changes, and the position of the optical axis of the first group lens 6 changes with the contact position between the bottom surface of the positioning hole 9a and the tip surface of the positioning shaft 5a as a fulcrum. Tilt adjustment can be performed.
[0025]
As described above, in this embodiment, it is possible to adjust the eccentricity of the optical axes of the first group lens 6 and the second group lens group 12 by selecting the assembly rotation position of the first group holder 5. Further, by selecting the screwing amount of the adjusting screw 8, the inclination of the optical axis of the first group holder 5 (first group lens 6) can be adjusted. In addition, by separating the first group holder support ring 4 having the adjustment collar portion 4a for adjusting the inclination and the pressing collar portion 4b from the first group holder 5, the first group holder 5 is rotated for eccentric adjustment. However, the first group holder support ring 4 does not rotate. Therefore, adjustment flange 4a and the pressing flange portion 4b, these flange portions 4a, interfere with the shutter driving unit 7 located 4b and the same plane (plane perpendicular to the optical axis of the lens barrel) Absent. Therefore, it you to place the shutter driving unit 7 in the lens barrel 1, it is not necessary to provide a space that allows the rotation of the adjustment flange 4a and the pressing flange 4b in the lens barrel 1, the entire lens barrel Can be miniaturized.
[0026]
In this embodiment, the case where the shutter driving unit 7 is provided inside the lens barrel 1 has been described. However, in the present invention, a barrier driving mechanism, an AF driving mechanism, a camera shake prevention driving mechanism, and the like are arranged inside the lens barrel. It can also be applied to the case.
[0027]
【The invention's effect】
As described above, according to the present invention, even if the lens holder is rotated in order to adjust the optical axis position of the lens (that is, the eccentricity with respect to another lens), the holder holder that holds the lens holder in a tiltable manner. Since the member and the tilt adjusting mechanism for adjusting the optical axis tilt of the lens do not rotate, these holder holding members and tilt adjusting mechanism are mirrors such as a shutter driving mechanism, a lens barrier driving mechanism, an AF driving mechanism, and an anti-shake driving mechanism. There is no interference with the cylinder operating mechanism. Therefore, the lens barrel operating mechanism can be accommodated in a space (excess space) in the radial direction of the lens barrel between the lens holder and the lens barrel body. Miniaturization of the camera ( miniaturization in the radial direction) can be achieved.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a lens barrel according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional view of the lens barrel.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Lens barrel 2 ... Floating prevention spring 3 ... Holding spring 4 ... 1 group holder support ring 5 ... 1 group holder 6 ... 1 group lens 7 ... Shutter drive part 8 ... Tilt adjusting screw 9 ... Front plate 10 ... Shutter blade 11 ... Back plate 12 ... 2 group lens 13 ... 2 group holder 14 ... Rotating cylinder 15 ... Straight running cylinder 16 ... Fixed cylinder 17 ... Lens barrel drive mechanism 18 ... Camera body

Claims (5)

レンズを保持し、周方向に配置された複数の位置決め軸を有するレンズホルダと、
該レンズホルダの所定角度毎の回転調整に応じて、前記複数の位置決め軸のうちいずれかの位置決め軸と係合可能な位置決め穴を有する地板と、
前記レンズホルダを傾動可能に保持するホルダ保持部材と、
前記位置決め穴および前記位置決め軸の当接位置を支点として、前記ホルダ保持部材を介して前記レンズホルダを傾動させることにより、前記レンズの傾きを調整するための傾き調整機構とを有することを特徴とするレンズ鏡筒。
A lens holder that holds the lens and has a plurality of positioning shafts arranged in the circumferential direction ;
A base plate having a positioning hole engageable with any one of the plurality of positioning shafts in accordance with the rotation adjustment for each predetermined angle of the lens holder;
A holder holding member for tiltably holding the lens holder;
A tilt adjustment mechanism for adjusting the tilt of the lens by tilting the lens holder via the holder holding member with the contact position of the positioning hole and the positioning shaft as a fulcrum. Lens barrel to be used.
前記傾き調整機構は、前記ホルダ保持部材の周方向における複数箇所に関して、各箇所における光軸方向位置を調整可能であることを特徴とする請求項1に記載のレンズ鏡筒。The inclination adjustment mechanism is related to a plurality of positions in the circumferential direction of the holder holding member, the lens barrel according to claim 1, characterized in that it is capable of adjusting the optical axis direction position in each location. 前記レンズホルダ鏡筒本体との間であって、該レンズ鏡筒の径方向におけるスペースに、鏡筒動作用機構が配置されていることを特徴とする請求項1又は2に記載のレンズ鏡筒。3. The lens according to claim 1 , wherein a lens barrel operating mechanism is disposed between the lens holder and the lens barrel body in a space in a radial direction of the lens barrel. A lens barrel. 前記鏡筒動作用機構が、シャッター駆動機構、オートフォーカス駆動機構、レンズバリア駆動機構、又はぶれ防止駆動機構であることを特徴とする請求項3に記載のレンズ鏡筒。4. The lens barrel according to claim 3, wherein the lens barrel operating mechanism is a shutter driving mechanism , an autofocus driving mechanism, a lens barrier driving mechanism, or a shake prevention driving mechanism . 請求項1からのいずれか1つに記載のレンズ鏡筒を備えたことを特徴とするカメラ。Camera comprising the lens barrel according to claim 1 any one of the four.
JP1238898A 1998-01-26 1998-01-26 Lens barrel and camera Expired - Fee Related JP3962470B2 (en)

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Publication number Priority date Publication date Assignee Title
JP2002296476A (en) * 2001-03-29 2002-10-09 Olympus Optical Co Ltd Lens frame
JP4674787B2 (en) * 2003-12-12 2011-04-20 キヤノン株式会社 Lens barrel and camera
JP2006047395A (en) * 2004-07-30 2006-02-16 Kyocera Mita Corp Lens unit for image scanning system

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