JPH04130309A - Driving device of optical system - Google Patents
Driving device of optical systemInfo
- Publication number
- JPH04130309A JPH04130309A JP25320390A JP25320390A JPH04130309A JP H04130309 A JPH04130309 A JP H04130309A JP 25320390 A JP25320390 A JP 25320390A JP 25320390 A JP25320390 A JP 25320390A JP H04130309 A JPH04130309 A JP H04130309A
- Authority
- JP
- Japan
- Prior art keywords
- feed rod
- cam
- axis direction
- optical axis
- lead screw
- 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.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 230000007246 mechanism Effects 0.000 description 3
- 238000005266 casting Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
Landscapes
- Lens Barrels (AREA)
Abstract
Description
【発明の詳細な説明】
[産業上の利用分野コ
本発明はビデオカメラ、SV左カメラ−眼レフカメラ等
の撮影系において、2群以上のレンズを連動して動かす
レンズ鏡筒に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a lens barrel that moves two or more groups of lenses in conjunction with each other in a photographing system such as a video camera, SV left camera-eye reflex camera, etc. .
[従来の技術]
リードネジを使用して2群以上のレンズを連動させる装
置は既に特願平2−72932号で提案されている。[Prior Art] A device for interlocking two or more lens groups using lead screws has already been proposed in Japanese Patent Application No. 72932/1999.
第2図は上記出願の1実施例に係る装置を示す。FIG. 2 shows an apparatus according to one embodiment of the above application.
同図において101はレンズ群を移動させるためにv型
のらせん溝101a、101bが切っである送り棒10
2.103は、各々レンズ群を抱えている移動環。In the figure, reference numeral 101 denotes a feed rod 10 having V-shaped spiral grooves 101a and 101b for moving the lens group.
2.103 is a movable ring that holds each lens group.
104はレンズ群の光軸に対する偏心を押える案内棒。Reference numeral 104 denotes a guide rod that suppresses eccentricity of the lens group with respect to the optical axis.
105は鋼球。106は板バネである。105 is a steel ball. 106 is a leaf spring.
このように構成すると鋼球105は板バネ106によっ
て■溝101aと101bにおしつけられているので、
送り棒101が図示しないモータ駆動力で回転するとレ
ンズ群は光軸方向にV溝101a、1olbのピッチと
送り棒101の回転速度に応じて移動することになる。With this configuration, the steel ball 105 is forced into the grooves 101a and 101b by the leaf spring 106, so that
When the feed rod 101 is rotated by the driving force of a motor (not shown), the lens group moves in the optical axis direction according to the pitch of the V-grooves 101a and 1olb and the rotational speed of the feed rod 101.
そしてフランジ部107を境に片側は右まわり(V溝1
01a)、逆側は左まわり(V溝101b)にらせんを
切っておくことにより2つのレンズ群を送り棒の回転に
連動させて反対方向へ移動させることができる。Then, one side rotates clockwise (V groove 1
01a), by cutting a spiral counterclockwise (V groove 101b) on the opposite side, the two lens groups can be moved in opposite directions in conjunction with the rotation of the feed rod.
[発明が解決しようとしている課題]
しかしながら上記例では、送り棒にらせん溝を切ってい
るので、各レンズ群の移動は、送り棒の回転方向によっ
て一方向になってしまう。従って同一回転方向でレンズ
群を光軸方向に往復運動をさせるには適さない。[Problems to be Solved by the Invention] However, in the above example, since a spiral groove is cut in the feed rod, each lens group moves in one direction depending on the rotating direction of the feed rod. Therefore, it is not suitable for reciprocating the lens group in the optical axis direction in the same rotational direction.
一方、ズームレンズの高倍率化とコンパクト化を実現す
るためには、この往復運動が必要な場合があり、第2図
の構成ではズームレンズの移動軌跡に制約ができてしま
う。On the other hand, in order to achieve high magnification and compactness of the zoom lens, this reciprocating movement may be necessary, and the configuration shown in FIG. 2 imposes restrictions on the movement locus of the zoom lens.
また、ズームレンズの複数群のうち少なくとも1群のレ
ンズの移動軌跡を非直線とする場合、送り棒のらせん溝
は複数のリードを持ったものにしなければならない。現
在複数のリードを持った送り棒を製作するには、加工上
むすかしく、高価な送り棒になってしまう。Further, when the movement locus of at least one lens group among the plurality of groups of the zoom lens is made to be non-linear, the spiral groove of the feed rod must have a plurality of leads. Currently, it is difficult to manufacture a feed rod with multiple leads, resulting in an expensive feed rod.
本発明は、安価で且つ小型のレンズ群移動機構を提供す
ることを目的とする。An object of the present invention is to provide an inexpensive and compact lens group moving mechanism.
[課題を解決するための手段]
本発明は、レンズ群の移動を行う為の送りネジ付き棒に
、別のレンズ群の移動を行う為非直線リフトを持つカム
部材を設けたことにより、あらゆるタイプの連動を可能
にしたものである。[Means for Solving the Problems] The present invention provides a cam member having a non-linear lift for moving another lens group on a feed screw rod for moving one lens group. This makes it possible to link types.
[実施例] 第1図は本発明の第1の実施例を示している。[Example] FIG. 1 shows a first embodiment of the invention.
同図において、lは送り棒で、台形溝リードネジ部1a
及び通常の円柱形状部1bをもっている。In the same figure, l is a feed rod, and the trapezoidal groove lead screw part 1a
And it has a normal cylindrical portion 1b.
尚、溝は便宜上、1箇所のみ示して他は省いている。For convenience, only one groove is shown and the others are omitted.
2.3は各々レンズ群り、、Lを抱いている移動環、4
はレンズ群2,3の光軸に対する偏心を押えるために移
動環の端の軸承に嵌合する案内棒。5は鋼球で、移動環
3に接合された板バネ6によりリードネジ部1aに付勢
されている。7,8は送り棒1と案内棒4を固定するた
めの鏡筒の一部をなす固定部材。9は送り棒1の円柱形
状部1bに固着された筒状カム部材で、カム面9aは周
に沿って凸又は凹の非直線リフトを持ち、移動環2のカ
ムフォロアー2aと当接している。lOは、移動環2と
3の間に圧入されたコイルバネで送り棒1とのガタ取り
作用のバネ部材。2.3 is a moving ring holding each lens group, L, 4
is a guide rod that fits into the bearing at the end of the movable ring in order to suppress the eccentricity of the lens groups 2 and 3 with respect to the optical axis. Reference numeral 5 denotes a steel ball, which is biased against the lead screw portion 1a by a plate spring 6 joined to the movable ring 3. 7 and 8 are fixing members forming part of the lens barrel for fixing the feed rod 1 and the guide rod 4; Reference numeral 9 denotes a cylindrical cam member fixed to the cylindrical portion 1b of the feed rod 1, the cam surface 9a has a convex or concave non-linear lift along the circumference, and is in contact with the cam follower 2a of the movable ring 2. . IO is a coil spring press-fitted between movable rings 2 and 3, and is a spring member that eliminates looseness with the feed rod 1.
11は鋼球で、コイルバネ12により送り棒1の片端面
に付勢されて、光軸方向のガタ付きを吸収している。A steel ball 11 is biased against one end surface of the feed rod 1 by a coil spring 12 to absorb wobbling in the optical axis direction.
つぎに、上記構成において、カム部材9を図示しないマ
ニアル操作部材またはアクチュエーター、例えばカム部
材9の側面に歯車を形成し、モータの駆動歯車と噛合せ
て動かすと、送り棒1が回動し、送り棒1に形成された
リードネジ部1aにより移動環3が光軸方向に移動する
。このとき移動環2は送り棒lの外径と嵌合しているだ
けで、リードに関係な(、カム部材9のカム面9の形状
に沿って同期的に光軸方向に移動する。Next, in the above configuration, when the cam member 9 is moved by a manual operation member or an actuator (not shown), for example, a gear is formed on the side surface of the cam member 9 and meshed with a drive gear of a motor, the feed rod 1 rotates. The movable ring 3 is moved in the optical axis direction by a lead screw portion 1a formed on the feed rod 1. At this time, the movable ring 2 is only fitted with the outer diameter of the feed rod 1, and moves synchronously in the optical axis direction along the shape of the cam surface 9 of the cam member 9, which is related to the lead.
ここでリードネジ部1aは一定のリードを持っている。Here, the lead screw portion 1a has a constant lead.
従って移動環3は、送り棒lの回転量に比例した動きを
するが、移動環2は、カム部材9のカム形状により送り
棒1の回転量には制約されない所望の動きをする。Therefore, the movable ring 3 moves in proportion to the amount of rotation of the feed rod 1, but the movable ring 2 makes a desired movement that is not restricted by the amount of rotation of the feed rod 1 due to the cam shape of the cam member 9.
尚、第2図に示す送りネジ棒を第1図の送り棒1の一部
に利用すれば2つの単調移動軌跡と1つの非直線移動軌
跡を持つズームレンズの駆動機構を構成することもでき
る。If the feed screw rod shown in FIG. 2 is used as part of the feed rod 1 shown in FIG. 1, it is possible to configure a zoom lens drive mechanism having two monotonous movement loci and one non-linear movement locus. .
また、第1図の送り棒lに2つのカム部材とハネ部材を
適用すれば、1つの単調移動軌跡と行き戻り部を持つ2
の曲線軌跡を持つズームレンズの駆動を行うこともでき
る。In addition, if two cam members and a spring member are applied to the feed rod l shown in Fig. 1, two
It is also possible to drive a zoom lens with a curved locus of .
上側でカム9は、送り棒lに別部材として固着している
が、モールドやグイキャストにより一体成形が可能であ
る。The cam 9 on the upper side is fixed to the feed rod l as a separate member, but it can be integrally formed by molding or gui-casting.
更に、移動環3が送り棒1の回転量に比例した動きをし
ない場合には、リードネジ1a及びリードネジに付勢す
るための鋼球5と板バネ6を廃止して、移動環2と周面
カム9のような構成によればよい。Furthermore, if the movable ring 3 does not move in proportion to the amount of rotation of the feed rod 1, the lead screw 1a and the steel balls 5 and plate springs 6 for biasing the lead screw may be eliminated, and the movable ring 2 and the surrounding surface A configuration like the cam 9 may be used.
又、リードネジのピッチが変化する様にしてもよい。Further, the pitch of the lead screw may be changed.
本装置は撮影用ズームレンズだけでなく、ファインダー
用ズームレンズ機構にも適用できる。又、変倍の他に、
フォーカシングの際のフローティングにも利用できる。This device can be applied not only to photographic zoom lenses but also to finder zoom lens mechanisms. Also, in addition to variable magnification,
It can also be used for floating during focusing.
[発明の利用]
以上説明したように、リードネジ付き送り棒にカムを設
けたことにより、あらゆるタイプのズームレンズ移動に
対応できる。従って、光学設計上、レンズ移動に対する
制約を少なくでき、送り棒を使用した、通常のカム環方
式より安価で、さらに複数リードを持たないズームレン
ズ鏡筒を実現できる。[Usage of the Invention] As explained above, by providing the cam on the feed rod with a lead screw, it is possible to cope with all types of zoom lens movement. Therefore, in terms of optical design, restrictions on lens movement can be reduced, and it is possible to realize a zoom lens barrel that is cheaper than a normal cam ring system using a feed rod and does not have multiple leads.
またカムを使うことによりレンズの往復移動が可能とな
りズームレンズの高倍率化とコンパクト化が実現できる
。Also, by using a cam, the lens can be moved back and forth, making it possible to achieve higher magnification and a more compact zoom lens.
第1図は本発明を実施したズームレンズ鏡筒の断面図。
第2図は先の出願の実施例の断面図。
■=送り棒、la:リードネジ部、2と3=移動環、4
:案内棒、5と11=鋼球、6:板バネ、7と8:固定
部材、9:カム部材、
10と12=バネ
である。FIG. 1 is a sectional view of a zoom lens barrel embodying the present invention. FIG. 2 is a sectional view of the embodiment of the earlier application. ■ = feed rod, la: lead screw part, 2 and 3 = moving ring, 4
: guide rod, 5 and 11 = steel ball, 6: plate spring, 7 and 8: fixed member, 9: cam member, 10 and 12 = spring.
Claims (2)
ための装置において、 所定の光学要素を光学的に定められた移動軌跡に応じて
移動させるための送りネジ付き棒に、別の光学要素を光
学的に定められた移動軌跡に応じて移動させるための非
直線カムを持つ部材を一体に回転する様に設けたことを
特徴とする光学系の駆動装置。(1) In a device for synchronously moving multiple optical elements in the optical axis direction, a feed threaded rod for moving a predetermined optical element according to an optically determined movement locus is connected to another 1. A drive device for an optical system, characterized in that a member having a non-linear cam for moving an optical element according to an optically determined movement locus is provided so as to rotate integrally with the member.
ための装置において、 光学要素を移動させるための周面カムをカムリフトが光
軸方向に変化する様に、回転駆動される駆動棒に設けた
ことを特徴とする光学系の駆動装置。(2) In a device for synchronously moving a plurality of optical elements in the optical axis direction, a drive rod is rotatably driven so that the cam lift changes in the optical axis direction to change the circumferential cam for moving the optical elements. An optical system driving device characterized by being provided with.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP25320390A JPH04130309A (en) | 1990-09-20 | 1990-09-20 | Driving device of optical system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP25320390A JPH04130309A (en) | 1990-09-20 | 1990-09-20 | Driving device of optical system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH04130309A true JPH04130309A (en) | 1992-05-01 |
Family
ID=17247988
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP25320390A Pending JPH04130309A (en) | 1990-09-20 | 1990-09-20 | Driving device of optical system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH04130309A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001318293A (en) * | 2000-05-09 | 2001-11-16 | Asahi Optical Co Ltd | Zoom-adjusting mechanism |
JP2014223278A (en) * | 2013-04-18 | 2014-12-04 | 富士フイルム株式会社 | Endoscope device |
-
1990
- 1990-09-20 JP JP25320390A patent/JPH04130309A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001318293A (en) * | 2000-05-09 | 2001-11-16 | Asahi Optical Co Ltd | Zoom-adjusting mechanism |
JP2014223278A (en) * | 2013-04-18 | 2014-12-04 | 富士フイルム株式会社 | Endoscope device |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6064533A (en) | Zoom assembly | |
US3765748A (en) | Mechanism for relative adjustment of axially spaced lens components | |
US4585313A (en) | Lens drive device and optical lens assembly utilizing the same | |
US6151171A (en) | Zoom assembly having zoom lens with plurality of lens group that move together or differentially for zooming and focusing | |
JP2593659B2 (en) | Inner focus zoom lens | |
US6108146A (en) | Zoom assembly having an improved cam barrel | |
JPH04130309A (en) | Driving device of optical system | |
JP2767468B2 (en) | Lens barrel | |
JP2001100081A (en) | Lens moving device | |
JP2643284B2 (en) | Cam device for lens movement | |
JP2521866Y2 (en) | Lens moving device | |
JPH1164707A (en) | Zoom lens barrel | |
JPH1123942A (en) | Lens driving device | |
JP3503282B2 (en) | Zoom lens barrel | |
JPH10246849A (en) | Lens barrel | |
JP3793438B2 (en) | Lens movement mechanism for zoom lens system switching group | |
JP2844594B2 (en) | Zoom lens barrel | |
JP3252465B2 (en) | Lens barrel | |
JP2538265B2 (en) | Zoom lens barrel | |
JP2521864Y2 (en) | Lens moving device | |
JPH03206409A (en) | Zoom lens barrel | |
JP2787690B2 (en) | Zoom camera | |
JP3733046B2 (en) | Lens group for switching group of zoom lens system having switching group | |
JPH0682614U (en) | Lens frame drive mechanism | |
JPH04315113A (en) | Zooming mechanism |