JP3152366B2 - Drive mechanism for taking lens - Google Patents
Drive mechanism for taking lensInfo
- Publication number
- JP3152366B2 JP3152366B2 JP13027692A JP13027692A JP3152366B2 JP 3152366 B2 JP3152366 B2 JP 3152366B2 JP 13027692 A JP13027692 A JP 13027692A JP 13027692 A JP13027692 A JP 13027692A JP 3152366 B2 JP3152366 B2 JP 3152366B2
- Authority
- JP
- Japan
- Prior art keywords
- group
- lens
- guide
- optical axis
- support frame
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Lens Barrels (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は撮影レンズの駆動機構に
係り、特に複数群構成の撮影レンズのうちの少なくとも
１群を光軸方向に移動させる撮影レンズの駆動機構に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographing lens driving mechanism, and more particularly to a photographing lens driving mechanism for moving at least one of a plurality of photographing lenses in an optical axis direction.
【０００２】[0002]
【従来の技術】従来の撮影レンズの駆動機構としては、
図５に示す構成のものがある（特公平３−６４８５３号
公報）。この撮影レンズの駆動機構は、撮影レンズ１を
支持するレンズ支持枠２をガイド軸３によって光軸方向
に移動自在に案内し、一方、ガイド軸３を中心にして回
動自在にカム４を配設し、このカム４を回動させること
により撮影レンズ１を光軸方向に移動させるようにして
いる。2. Description of the Related Art As a conventional driving mechanism of a photographing lens,
There is a configuration shown in FIG. 5 (Japanese Patent Publication No. 3-64853). The drive mechanism of the photographing lens guides a lens support frame 2 that supports the photographing lens 1 movably in a direction of an optical axis by a guide shaft 3, and a cam 4 that is rotatable about the guide shaft 3. The photographing lens 1 is moved in the optical axis direction by rotating the cam 4.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記従
来の撮影レンズの駆動機構は、ガイド軸３によって案内
されるレンズ支持枠２のガイド部２Ａの長さｌが短く、
そのため撮影レンズ１を光軸方向に移動させた場合の移
動軌跡を、光軸方向に正確に一致させることが難しいと
いう問題がある。However, in the above-described conventional photographic lens driving mechanism, the length l of the guide portion 2A of the lens support frame 2 guided by the guide shaft 3 is short.
Therefore, there is a problem that it is difficult to make the movement locus when the photographing lens 1 is moved in the optical axis direction exactly coincide with the optical axis direction.
【０００４】一方、レンズ支持枠２のガイド部２Ａの長
さｌを十分に長くとる直進性能が良くなるが、前側地板
５と後側地板６との間の長さＬが長くなり、カメラが大
型化するという問題がある。また、上記撮影レンズ１は
１群構成であるが、例えば２群構成の撮影レンズにした
場合には、各群のレンズ支持枠のガイド部同士の干渉を
避けるために、更に長さＬを長くしなければならなくな
る。[0004] On the other hand, the straight running performance is improved by making the length l of the guide portion 2A of the lens support frame 2 sufficiently long, but the length L between the front ground plate 5 and the rear ground plate 6 becomes long, and the camera becomes difficult. There is a problem that the size is increased. The photographing lens 1 has a single-group configuration. For example, when the photographing lens 1 has a two-group configuration, the length L is further increased in order to avoid interference between the guide portions of the lens support frames of each group. Have to do it.
【０００５】本発明はこのような事情に鑑みてなされた
もので、複数群構成の撮影レンズの移動時の性能を良好
にするとともに、カメラの小型化を図ることができる撮
影レンズの駆動機構を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a driving mechanism for a photographic lens which can improve the performance of a photographic lens having a plurality of groups when moving and can downsize the camera. The purpose is to provide.
【０００６】[0006]
【課題を解決するための手段】本発明は前記目的を達成
するために、複数群構成の撮影レンズと、前記撮影レン
ズの各群をそれぞれ支持し、群の直進性能若しくは回動
性能をよくするための所定の長さの１つのガイド部を有
する各群ごとのレンズ支持枠と、前記撮影レンズの光軸
と平行に配設され複数群をそれぞれ光軸方向に移動自在
に若しくは光軸方向及び光軸と直交する方向に移動自在
に案内する２本以上のガイド軸であって、各レンズ支持
枠の前記ガイド部がそれぞれ異なるガイド軸に挿通され
るガイド軸と、複数群のうちの或る群のレンズ支持枠の
ガイド部が挿通されたガイド軸を中心にして回動自在に
配設され、その回動位置に応じて複数群のうちの他のガ
イド軸にレンズ支持枠のガイド部が挿通された群を光軸
方向に移動させるカムと、前記カムを回動させる駆動手
段と、を備えたことを特徴としている。According to the present invention, in order to achieve the above object, a plurality of groups of photographing lenses and each group of the photographing lenses are supported to improve the straight traveling performance or the rotation performance of the groups. A lens support frame for each group having one guide portion of a predetermined length, and a plurality of groups arranged in parallel with the optical axis of the photographing lens so as to be movable in the optical axis direction or to move in the optical axis direction. Two or more guide shafts for movably guiding in a direction orthogonal to the optical axis, wherein the guide portions of the lens support frames are inserted through different guide shafts, and a certain group of plural groups. The guide portion of the lens support frame of the group is rotatably disposed about the guide shaft through which the lens support frame is inserted, and the guide portion of the lens support frame is mounted on another guide shaft of the plurality of groups according to the rotation position. Move the inserted group in the optical axis direction And arm, is characterized by comprising a driving means for rotating the cam.
【０００７】[0007]
【作用】本発明によれば、複数群構成の撮影レンズの各
群を、それぞれ２本以上のガイド軸によって案内するよ
うにしたため、撮影レンズの移動時の性能を良くするた
めに各群のレンズ支持枠のガイド部を十分に長くしても
ガイド部同士が干渉することがない。また、或る群を案
内するガイド軸にカムを回動自在に配設し、このカムに
よって他のガイド軸に案内された群を光軸方向に移動さ
せるようにしたため、カムによって駆動される群のレン
ズ支持枠のガイド部とカムとの干渉も回避することがで
きる。According to the present invention, each group of a plurality of groups of photographing lenses is guided by two or more guide shafts. Therefore, in order to improve the performance of the photographing lens when moving, the lenses of each group are improved. Even if the guide portions of the support frame are sufficiently long, the guide portions do not interfere with each other. Further, a cam is rotatably arranged on a guide shaft for guiding a certain group, and a group guided by another guide shaft by this cam is moved in the optical axis direction. The interference between the guide portion of the lens support frame and the cam can also be avoided.
【０００８】[0008]
【実施例】以下添付図面に従って本発明に係る撮影レン
ズの駆動機構の好ましい実施例を詳述する。図１は本発
明に係る撮影レンズの駆動機構の第１実施例を示す縦断
面図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a photographic lens driving mechanism according to the present invention; FIG. 1 is a longitudinal sectional view showing a first embodiment of a driving mechanism for a photographing lens according to the present invention.
【０００９】同図に示すように、このレンズ駆動機構に
よって駆動される撮影レンズは、２群構成のズームレン
ズであり、第１群１０及び第２群１２はそれぞれレンズ
支持枠１４及び１６に支持されている。尚、第１群１０
は、図示しない手段によりレンズ支持枠１４に対して光
軸方向に移動自在に配設されいる。また、前側地板１８
と後側地板２０との間には、２本のガイド軸２２、２４
が互いに平行に配設されている。尚、２本のガイド軸２
２、２４は、図１上の紙面と直交する方向にも離間して
配設されている。As shown in FIG. 1, the photographing lens driven by the lens driving mechanism is a two-group zoom lens, and the first group 10 and the second group 12 are supported by lens support frames 14 and 16, respectively. Have been. In addition, the first group 10
Is disposed movably in the optical axis direction with respect to the lens support frame 14 by means not shown. Also, the front ground plate 18
And two rear guide shafts 22 and 24 between
Are arranged in parallel with each other. In addition, two guide shafts 2
The reference numerals 2 and 24 are also spaced apart in a direction orthogonal to the plane of FIG.
【００１０】前記レンズ支持枠１４及び１６の一端に
は、ガイド部１４Ａ及び１６Ａが形成されており、これ
らのガイド部１４Ａ及び１６Ａは、それぞれ前記ガイド
軸２２、２４に挿通されている。これにより、レンズ支
持枠１４及び１６（即ち、第１群１０及び第２群１２）
は、それぞれ光軸方向に移動自在に案内されている。一
方、ガイド軸２４には、カム２６が回動自在に配設され
ている。このカム２６の外周にはギア２６Ａが形成され
ており、図示しないフォーカスモータからギア列を介し
て回転駆動力が加えられるようになっている。そして、
レンズ支持枠１４は、図示しないバネによって図１上で
左方向に付勢され、レンズ支持枠１４に設けたカム従動
子１４Ｂが、カム２６のカム面２６Ｂに常時当接するよ
うになっている。Guide portions 14A and 16A are formed at one ends of the lens support frames 14 and 16, and these guide portions 14A and 16A are inserted through the guide shafts 22 and 24, respectively. Thereby, the lens support frames 14 and 16 (that is, the first group 10 and the second group 12)
Are guided movably in the optical axis direction. On the other hand, a cam 26 is rotatably disposed on the guide shaft 24. A gear 26A is formed on the outer periphery of the cam 26, and a rotational driving force is applied from a focus motor (not shown) via a gear train. And
The lens support frame 14 is urged leftward in FIG. 1 by a spring (not shown), and a cam follower 14B provided on the lens support frame 14 is always in contact with the cam surface 26B of the cam 26.
【００１１】次に、上記構成の撮影レンズの駆動機構の
作用について説明する。第１群１０及び第２群１２は、
それぞれ周知のようにズームカム環のカム溝（図示せ
ず）に係合しており、ズームカム環の回動によって、第
１群１０はレンズ支持枠１４に対して図２の矢印Ａに示
すように移動し、第２群１２は矢印Ｂに示すように移動
してズーミングが行われる。Next, the operation of the driving mechanism for the photographic lens having the above-described configuration will be described. The first group 10 and the second group 12
As is well known, the first group 10 is engaged with a cam groove (not shown) of the zoom cam ring, and the first group 10 is moved with respect to the lens support frame 14 as shown by an arrow A in FIG. The second group 12 moves as shown by arrow B, and zooming is performed.
【００１２】一方、カム２６を回動させると、そのカム
面２６Ｂに常時当接しているカム従動子１４Ｂを有する
レンズ支持枠２６は、その回動位置に応じてガイド軸２
２に沿って図２の矢印Ｃに示すように移動し、これによ
りピント合わせが行われる。尚、レンズ支持枠１４のガ
イド部１４Ａ及びレンズ支持枠１６のガイド部１６Ａ
は、それぞれ異なるガイド軸２２及び２４に挿通されて
いるため、直進性能を良くするためにガイド部１４Ａ及
び１６Ａの長さを長くしても、各ガイド部１４Ａ及び１
６Ｂは互いに干渉することがない。また、第１群１０を
光軸方向に移動させるためのカム２６を、第２群１２を
案内するガイド軸２４側に配設したため、第１群１０の
レンズ支持枠１４のガイド部１４Ａとカム２６との干渉
も回避することができる。即ち、前側地板１８と後側地
板２０との間の長さＬを短くすることができる。On the other hand, when the cam 26 is rotated, the lens support frame 26 having the cam follower 14B which is always in contact with the cam surface 26B moves the guide shaft 2 according to the rotation position.
2 is moved as shown by the arrow C in FIG. 2, whereby focusing is performed. The guide portion 14A of the lens support frame 14 and the guide portion 16A of the lens support frame 16
Are inserted through different guide shafts 22 and 24, respectively, so that even if the length of the guide portions 14A and 16A is increased in order to improve the straight running performance, each of the guide portions 14A and 1
6B do not interfere with each other. Further, since the cam 26 for moving the first group 10 in the optical axis direction is disposed on the guide shaft 24 side for guiding the second group 12, the cam 26 and the guide portion 14A of the lens support frame 14 of the first group 10 are provided. 26 can also be avoided. That is, the length L between the front ground plate 18 and the rear ground plate 20 can be reduced.
【００１３】図３は本発明に係る撮影レンズの駆動機構
の第２実施例を示す縦断面図である。尚、図１と共通す
る部分に関しては同一の符号を付し、その詳細な説明は
省略する。図３に示すように、このレンズ駆動機構によ
って駆動される撮影レンズは、２群構成の２焦点レンズ
であり、第１群３０及び第２群３２はそれぞれレンズ支
持枠３４及び３６に支持されている。FIG. 3 is a longitudinal sectional view showing a second embodiment of the driving mechanism of the taking lens according to the present invention. The same parts as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted. As shown in FIG. 3, the taking lens driven by this lens driving mechanism is a bifocal lens having a two-group configuration, and the first group 30 and the second group 32 are supported by lens support frames 34 and 36, respectively. I have.
【００１４】前記レンズ支持枠３４及び３６の一端に
は、ガイド部３４Ａ及び３６Ａが形成さており、これら
のガイド部３４Ａ及び３６Ａは、それぞれガイド軸２
４、２２に挿通されている。レンズ支持枠３４（即ち、
第１群３０）はガイド軸２４を中心にして回動自在に配
設され、これにより第１群３０は第２群３２の光軸上か
ら退避し又は光軸上に挿入される。即ち、図４に示すよ
うに第１群３０が第２群３２の光軸上から退避させられ
ると、長焦点（テレ）側に切り換えられ（図４
（Ａ））、第１群３０が第２群３２の光軸上に挿入され
ると、短焦点（ワイド）側に切り換えられる（図４
（Ｂ））。Guide portions 34A and 36A are formed at one end of the lens support frames 34 and 36, respectively.
4 and 22 are inserted. The lens support frame 34 (ie,
The first group 30) is disposed rotatably about the guide shaft 24, whereby the first group 30 is retracted from the optical axis of the second group 32 or inserted on the optical axis. That is, as shown in FIG. 4, when the first group 30 is retracted from the optical axis of the second group 32, it is switched to the long focal point (tele) side (FIG. 4).
(A)), when the first group 30 is inserted on the optical axis of the second group 32, it is switched to the short focus (wide) side (FIG. 4).
(B)).
【００１５】一方、第１実施例と同様にガイド軸２４に
は、カム２６が回動自在に配設され、このカム２６の回
動によって、カム従動子３６Ｂを有するレンズ支持枠３
６は、その回動位置に応じてガイド軸２２に沿って図４
の矢印Ｃに示すように移動し、これによりピント合わせ
が行われる。On the other hand, as in the first embodiment, a cam 26 is rotatably disposed on the guide shaft 24, and the rotation of the cam 26 causes the lens support frame 3 having the cam follower 36B to rotate.
6 along the guide shaft 22 according to the rotation position.
Is moved as shown by the arrow C, thereby performing focusing.
【００１６】[0016]
【発明の効果】以上説明したように本発明に係る撮影レ
ンズの駆動機構によれば、複数群構成の撮影レンズの各
群を、それぞれ２本以上のガイド軸によって案内するよ
うにしたため、各群のレンズ支持枠のガイド部を十分に
長くしてもガイド部同士が干渉することがなく、撮影レ
ンズの移動時の性能を良くすることができるとともに、
或る群を案内するガイド軸にカムを回動自在に配設し、
このカムによって他のガイド軸に案内された群を光軸方
向に移動させるようにしたため、カムによって駆動され
る群のレンズ支持枠のガイド部とカムとの干渉も回避す
ることができ、カメラの小型化を図ることができる。As described above, according to the photographing lens driving mechanism according to the present invention, each group of the photographing lens having a plurality of groups is guided by two or more guide shafts. Even if the guide portion of the lens support frame is sufficiently long, the guide portions do not interfere with each other, and the performance of the photographing lens when moving can be improved,
A cam is rotatably arranged on a guide shaft that guides a certain group,
Since the group guided by the other guide shaft by this cam is moved in the optical axis direction, interference between the cam and the guide portion of the lens support frame of the group driven by the cam can be avoided, and the camera can be moved. The size can be reduced.
【図１】図１は本発明に係る撮影レンズの駆動機構の第
１実施例を示す縦断面図である。FIG. 1 is a longitudinal sectional view showing a first embodiment of a driving mechanism for a photographing lens according to the present invention.
【図２】図２は第１実施例の撮影レンズの各群の動作を
説明するために用いた概略図である。FIG. 2 is a schematic view used to explain the operation of each group of the taking lens of the first embodiment.
【図３】図３は本発明に係る撮影レンズの駆動機構の第
３実施例を示す縦断面図である。FIG. 3 is a longitudinal sectional view showing a third embodiment of the driving mechanism of the taking lens according to the present invention.
【図４】図４（Ａ）及び（Ｂ）はそれぞれ第２実施例の
撮影レンズの各群に動作を説明するために用いた概略図
で、同図（Ａ）は長焦点側に切り換えられた状態を示
し、同図（Ｂ）は短焦点側に切り換えられた状態を示す
図である。FIGS. 4A and 4B are schematic diagrams used to explain the operation of each group of the taking lens of the second embodiment, and FIG. 4A is switched to a long focal length side; FIG. 7B is a diagram showing a state where the lens is switched to the short focus side.
【図５】図５は従来の撮影レンズの駆動機構の一例を示
す縦断面図である。FIG. 5 is a longitudinal sectional view showing an example of a conventional driving mechanism for a photographing lens.
１０、３０…第１群 １２、３２…第２群 １４、１６、３４、３６…レンズ支持枠 １４Ａ、１６Ａ、３４Ａ、３６Ａ…ガイド部 １４Ｂ、３６Ｂ…カム従動子 ２２、２４…ガイド軸 ２６…カム ２６Ｂ…カム面 10, 30 ... first group 12, 32 ... second group 14, 16, 34, 36 ... lens support frame 14A, 16A, 34A, 36A ... guide portion 14B, 36B ... cam follower 22, 24 ... guide shaft 26 ... Cam 26B ... Cam surface
───────────────────────────────────────────────────── フロントページの続き (72)発明者 三沢 充史 埼玉県朝霞市泉水三丁目11番46号 富士 写真フイルム株式会社内 (72)発明者 中沢 通隆 埼玉県朝霞市泉水三丁目11番46号 富士 写真フイルム株式会社内 (56)参考文献 特開 昭63−306410（ＪＰ，Ａ) 実開 昭62−140510（ＪＰ，Ｕ) 実開 昭64−36827（ＪＰ，Ｕ) ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Mitsushi Misawa 3--11-46 Izumi, Asaka-shi, Saitama Fuji Photo Film Co., Ltd. Fuji Photo Film Co., Ltd. (56) References JP-A-63-306410 (JP, A) JP-A-62-140510 (JP, U) JP-A-64-36827 (JP, U)
Claims (2)
をよくするための所定の長さの１つのガイド部を有する
各群ごとのレンズ支持枠と、 前記撮影レンズの光軸と平行に配設され複数群をそれぞ
れ光軸方向に移動自在に案内する２本以上のガイド軸で
あって、各レンズ支持枠の前記ガイド部がそれぞれ異な
るガイド軸に挿通されるガイド軸と、 複数群のうちの或る群のレンズ支持枠のガイド部が挿通
されたガイド軸を中心にして回動自在に配設され、その
回動位置に応じて複数群のうちの他のガイド軸にレンズ
支持枠のガイド部が挿通された群を光軸方向に移動させ
るカムと、 前記カムを回動させる駆動手段と、 を備えたことを特徴とする撮影レンズの駆動機構。1. A a photographing lens of the plurality of groups constituting, respectively support each group of the photographic lens, straight performance of the group
A lens support frame of each group having one of the guide portion of the predetermined length for better, movably in draft multiple groups disposed parallel to the optical axis of the photographing lens in the optical axis direction Two or more guide shafts, wherein the guide portions of each lens support frame are inserted through different guide shafts, and the guide portions of a certain group of lens support frames of a plurality of groups are inserted. The group in which the guide portion of the lens support frame is inserted into the other guide shaft of the plurality of groups is moved in the optical axis direction in accordance with the rotation position. A driving mechanism for a photographing lens, comprising: a cam; and driving means for rotating the cam.
若しくは回動性能をよくするための所定の長さの１つのOr one of the predetermined length to improve the rotation performance
ガイド部を有する各群ごとのレンズ支持枠と、A lens support frame for each group having a guide portion, 前記撮影レンズの光軸と平行に配設され複数群をそれぞEach group is arranged in parallel with the optical axis of the taking lens.
れ光軸方向及び光軸と直交する方向に移動自在に案内すGuide movably in the optical axis direction and in the direction perpendicular to the optical axis.
る２本以上のガイド軸であって、各レンズ支持枠の前記Two or more guide shafts, each of the lens support frames
ガイド部がそれぞれ異なるガイド軸に挿通されるガイドGuides whose guides are inserted into different guide shafts
軸と、Axis and 複数群のうちの或る群のレンズ支持枠のガイド部が挿通Guide part of lens support frame of a certain group of plural groups is inserted
されたガイド軸を中心にして回動自在に配設され、そのIs arranged so as to be rotatable around the guide shaft
回動位置に応じて複数群のうちの他のガイド軸にレンズLens on other guide shaft of multiple groups according to rotation position
支持枠のガイド部が挿通された群を光軸方向に移動させMove the group through which the guide part of the support frame is inserted in the optical axis direction.
るカムと、Cam and 前記カムを回動させる駆動手段と、Driving means for rotating the cam, を備えたことを特徴とする撮影レンズの駆動機構。A driving mechanism for a photographing lens, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13027692A JP3152366B2 (en) | 1992-05-22 | 1992-05-22 | Drive mechanism for taking lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13027692A JP3152366B2 (en) | 1992-05-22 | 1992-05-22 | Drive mechanism for taking lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05323171A JPH05323171A (en) | 1993-12-07 |
| JP3152366B2 true JP3152366B2 (en) | 2001-04-03 |
Family
ID=15030437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13027692A Expired - Fee Related JP3152366B2 (en) | 1992-05-22 | 1992-05-22 | Drive mechanism for taking lens |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3152366B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9513459B2 (en) | 2011-07-05 | 2016-12-06 | Nikon Corporation | Driving apparatus, optical apparatus and imaging apparatus |
-
1992
- 1992-05-22 JP JP13027692A patent/JP3152366B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05323171A (en) | 1993-12-07 |
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