JPH0996750A - Tracking mechanism for camera - Google Patents
Tracking mechanism for cameraInfo
- Publication number
- JPH0996750A JPH0996750A JP7253744A JP25374495A JPH0996750A JP H0996750 A JPH0996750 A JP H0996750A JP 7253744 A JP7253744 A JP 7253744A JP 25374495 A JP25374495 A JP 25374495A JP H0996750 A JPH0996750 A JP H0996750A
- Authority
- JP
- Japan
- Prior art keywords
- optical axis
- lens
- camera
- tracking mechanism
- moves
- 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
Landscapes
- Lens Barrels (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、カメラのトラッキ
ング機構に係り、特にカメラのフランジバック調整が容
易なカメラのトラッキング機構に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tracking mechanism for a camera, and more particularly to a tracking mechanism for a camera that facilitates flange back adjustment of the camera.
【０００２】[0002]
【従来の技術】テレビカメラのフランジバック調整は、
レンズ鏡胴内の後端に位置するマスタレンズ群を前後移
動させながら、レンズマウントのフランジ面から焦点面
（ＣＣＤ）までの距離を正しく設定する。即ち、図４に
示すようにレンズ鏡胴１０内の後部にはマスタレンズ群
１２がレンズ支持枠１４を介して光軸に沿って前後方向
に摺動自在に配置されている。レンズ支持枠１４の溝１
６には偏心ピン１８の偏心部２０が嵌入され、図５に示
すように偏心ピン１８の溝１８Ａにマイナスドライバ等
を挿入し、これを回転することによりマスタレンズ群１
２を光軸に沿って前後移動し、調整を行う。2. Description of the Related Art The flange back adjustment of a TV camera is
Correctly set the distance from the flange surface of the lens mount to the focal plane (CCD) while moving the master lens group located at the rear end in the lens barrel back and forth. That is, as shown in FIG. 4, the master lens group 12 is disposed in the rear part of the lens barrel 10 so as to be slidable in the front-rear direction along the optical axis via the lens support frame 14. Groove 1 of lens support frame 14
The eccentric portion 20 of the eccentric pin 18 is fitted in the reference numeral 6, and a flat head screwdriver or the like is inserted into the groove 18A of the eccentric pin 18 as shown in FIG.
2 is moved back and forth along the optical axis for adjustment.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら前記従来
のトラッキング機構は、偏心ピン１８を回動させてマス
タレンズ群１２を直線移動させているので、偏心ピン１
８の回動に伴うマスタレンズ群１２の直線移動量が偏心
ピン１８の回転角度により異なり、偏心ピン１８の回転
に伴ってマスタレンズ群１２の移動量がリニアに変化せ
ず、精度の良いフランジバック調整が困難であった。However, in the conventional tracking mechanism described above, since the eccentric pin 18 is rotated to linearly move the master lens group 12, the eccentric pin 1
The amount of linear movement of the master lens group 12 due to the rotation of 8 differs depending on the rotation angle of the eccentric pin 18, and the amount of movement of the master lens group 12 does not change linearly with the rotation of the eccentric pin 18, resulting in an accurate flange. Back adjustment was difficult.
【０００４】更に従来のトラッキング機構は、トラッキ
ング量を多く必要とするレンズには、感度が高くなり過
ぎ、調整不可能であった。更に従来のトラッキング機構
は、トラッキング調整後の固定ねじの締め付けにより調
整済みの距離が変化する欠点があった。本発明は、この
ような事情に鑑みてなされたもので、調整が容易で精度
の高いカメラのトラッキング機構を提案することを目的
としている。Further, the conventional tracking mechanism has too high sensitivity for a lens that requires a large amount of tracking and cannot be adjusted. Further, the conventional tracking mechanism has a drawback that the adjusted distance is changed by tightening the fixing screw after the tracking adjustment. The present invention has been made in view of such circumstances, and an object thereof is to propose a tracking mechanism for a camera that is easy to adjust and has high accuracy.
【０００５】[0005]
【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、レンズを保持するレンズ支持枠をレンズ
鏡胴の光軸に沿って前後方向に微調移動しながらトラッ
キング調整を行うカメラのトラッキング機構に於いて、
前記レンズ鏡胴の光軸方向に沿って前後方向に移動可能
な連動部材を前記レンズ支持枠と連結し、光軸と直交す
る方向に移動可能な可動部材をテーパ面を介して前記連
動部材と接触させ、可動部材を光軸と直交する方向に移
動することにより連動部材を光軸に沿って前後移動さ
せ、レンズ支持枠を光軸に沿って前後移動させることを
特徴としている。In order to achieve the above object, the present invention provides a camera for performing tracking adjustment while finely moving a lens supporting frame for holding a lens in the front-back direction along an optical axis of a lens barrel. In the tracking mechanism of
An interlocking member that is movable in the front-rear direction along the optical axis direction of the lens barrel is connected to the lens support frame, and a movable member that is movable in the direction orthogonal to the optical axis is connected to the interlocking member via a tapered surface. It is characterized in that the interlocking member is moved back and forth along the optical axis by contacting and moving the movable member in a direction orthogonal to the optical axis, and the lens support frame is moved back and forth along the optical axis.
【０００６】本発明のカメラのトラッキング機構によれ
ば、レンズ支持枠に連動部材を連結し、この連動部材に
テーパ面を介して可動部材を設け、この可動部材を光軸
と直交する方向に移動しながら、連動部材を光軸に沿っ
て移動し、これによりレンズ支持枠を光軸に沿って前後
方向に移動するようにしたので、レンズ支持枠は可動部
材の移動に合わせてリニアに変化し、トラッキング調整
が容易になる。According to the tracking mechanism of the camera of the present invention, the interlocking member is connected to the lens support frame, the interlocking member is provided with the movable member via the tapered surface, and the movable member is moved in the direction orthogonal to the optical axis. However, since the interlocking member is moved along the optical axis so that the lens support frame is moved in the front-back direction along the optical axis, the lens support frame changes linearly in accordance with the movement of the movable member. , Tracking adjustment becomes easy.
【０００７】また可動部材にはこれを光軸と直交する方
向に移動する調整ねじが設けられ、この調整ねじには節
度機構が設けられているので、トラッキング調整後はこ
の節度機構によって調整ねじの回動が規制されるので、
調整後の固定用ねじは不要となる。Further, the movable member is provided with an adjusting screw for moving the movable member in a direction orthogonal to the optical axis, and the adjusting screw is provided with a moderating mechanism. Since rotation is restricted,
The fixing screw after adjustment is unnecessary.
【０００８】[0008]
【発明の実施の形態】以下添付図面に従って本発明に係
るカメラのトラッキング機構の好ましい実施の形態を説
明する。図１では本発明が適用されるテレビカメラの断
面構造が示され、レンズ鏡胴２０内にはフォーカスレン
ズ群２４、ズームレンズ群２６、２８、リレーレンズ３
０、マスタレンズ群３２が配置されている。固定レンズ
鏡胴２２にはフォーカスリング３４が回動自在に設けら
れ、このフォーカスリング３４を回動することによりヘ
リコイドねじを介してフォーカスレンズ群２４が前後移
動し、フォーカス調整をするようになっている。固定鏡
胴２２には ズームリング３６が回動自在に設けられ、
このズームリング３６を回動するとカム筒３８が回転す
るようになっている。一方ズームレンズ群２６、２８の
レンズ支持枠４０、４２はガイドバー４４によって直線
案内されるとともにカム筒３８によってその移動が規制
され、ズーム調整がなされるようになっている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of a camera tracking mechanism according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a sectional structure of a television camera to which the present invention is applied. Inside the lens barrel 20, a focus lens group 24, zoom lens groups 26 and 28, and a relay lens 3 are shown.
0, the master lens group 32 is arranged. A focus ring 34 is rotatably provided on the fixed lens barrel 22, and by rotating the focus ring 34, the focus lens group 24 is moved back and forth via a helicoid screw to perform focus adjustment. There is. A zoom ring 36 is rotatably provided on the fixed lens barrel 22,
When the zoom ring 36 is rotated, the cam cylinder 38 is rotated. On the other hand, the lens support frames 40 and 42 of the zoom lens groups 26 and 28 are linearly guided by a guide bar 44, and their movement is restricted by a cam barrel 38 so that zoom adjustment can be performed.
【０００９】レンズ鏡胴２０の後端部にはレンズ支持枠
４６を介してマスタレンズ群３２が前後方向に移動可能
に支持され、後述するトラッキング機構４８を用いてフ
ランジバック調整を行い、固定鏡胴２２に固定される。
図２では本発明に係るトラッキング機構４８の詳細な構
造が示されている。図２において固定鏡胴２２と一体の
固定枠２２Ａには連動部材５０が左右方向（光軸に沿っ
て前後方向）に移動自在に配置され、この連動部材５０
は固定枠２２Ａに形成された溝５２にその下端部が嵌入
して、レンズ鏡胴の光軸に沿って前後方向に案内され
る。更に連動部材５０の下端部に形成されたピン５１Ａ
はレンズ支持枠４６の溝４６Ａに嵌入し、これにより連
動部材５０が光軸に沿って前後動されると、レンズ支持
枠４６も光軸に沿って前後動するようになっている。The master lens group 32 is supported at the rear end of the lens barrel 20 via a lens support frame 46 so as to be movable in the front-rear direction, and a flange mechanism is adjusted by using a tracking mechanism 48, which will be described later, to make a fixed mirror. It is fixed to the body 22.
FIG. 2 shows the detailed structure of the tracking mechanism 48 according to the present invention. In FIG. 2, an interlocking member 50 is disposed on a fixed frame 22A integrated with the fixed lens barrel 22 so as to be movable in the left-right direction (front-back direction along the optical axis).
Has its lower end fitted in a groove 52 formed in the fixed frame 22A and is guided in the front-rear direction along the optical axis of the lens barrel. Further, a pin 51A formed at the lower end of the interlocking member 50
Is fitted into the groove 46A of the lens support frame 46, and when the interlocking member 50 is moved back and forth along the optical axis, the lens support frame 46 is also moved back and forth along the optical axis.
【００１０】固定枠２２Ａには略Ｌ字形に形成されたば
ね受け５４がピン５６を介して取り付けられ、このばね
受け５４はばね５８の端部を支持し、このばね５８は連
動部材５０を図２上で左方向に付勢する。一方固定枠２
２Ａには調整ねじ６０が設けられ、この調整ねじ６０の
下端部にはピン６２が取付けられ、ぴん６２の頭部には
可動部材６４が当接されている。この可動部材６４はピ
ン６２と調節ねじ６０で支持されているので、調整ねじ
６０を回動することにより固定枠２２Ａに対して上下移
動する。更にこの可動部材６４のテーパ面６４Ａは連動
部材５０のテーパ面５０Ａと接触している。従って、可
動部材６４が上方向に移動すると両部材はテーパ面５０
Ａ、６０Ａで接触しているので連動部材５０はばね５８
の付勢力に抗して図２上で右方向に移動し、可動部材６
４が下方向に移動すると連動部材５０はばね５８の付勢
力によって左方向に移動する。A spring receiver 54, which is formed in a substantially L shape, is attached to the fixed frame 22A through a pin 56, and the spring receiver 54 supports the end portion of a spring 58, and the spring 58 supports the interlocking member 50 in FIG. Energize to the left at the top. Meanwhile fixed frame 2
2A is provided with an adjusting screw 60, a pin 62 is attached to the lower end of the adjusting screw 60, and a movable member 64 is in contact with the head of the pin 62. Since the movable member 64 is supported by the pin 62 and the adjusting screw 60, the movable member 64 moves up and down with respect to the fixed frame 22A by rotating the adjusting screw 60. Further, the tapered surface 64A of the movable member 64 is in contact with the tapered surface 50A of the interlocking member 50. Therefore, when the movable member 64 moves upward, both members move to the tapered surface 50.
A and 60A are in contact with each other, so the interlocking member 50 has a spring 58.
2 is moved to the right in FIG. 2 against the urging force of the movable member 6
When 4 moves downward, the interlocking member 50 moves leftward by the urging force of the spring 58.
【００１１】調整ねじ６０の頭部にはＶ溝ローレット６
６が形成され、このＶ溝ローレット６６にはクリックボ
ール６８が嵌入し、調整ねじ６０を節度送りできるよう
になっている。即ち図３に示すようにクリックボール６
８は固定枠２２Ａの溝７０に配置されるとともに、固定
枠２２Ａに取り付けられた板ばね７２によって調整ねじ
６０の頭部に向けて付勢されている。これにより調整ね
じ６０は節度送りができるようになっている。A V-groove knurl 6 is provided on the head of the adjusting screw 60.
6 is formed, and a click ball 68 is fitted into this V-groove knurl 66 so that the adjusting screw 60 can be fed in a moderation. That is, as shown in FIG. 3, the click ball 6
8 is arranged in the groove 70 of the fixed frame 22A, and is biased toward the head of the adjusting screw 60 by the leaf spring 72 attached to the fixed frame 22A. As a result, the adjusting screw 60 can be fed by moderation.
【００１２】前記の如く構成された本発明に係るカメラ
のトラッキング機構の好ましい実施の形態の作用は次の
とおりである。まず図２で示すカバー７４を外した状態
で調整ねじ６０のマイナス溝６０Ａにマイナスドライバ
等を挿入し調整ねじ６０を右回り又は左回りに回動す
る。調整ねじ６０が回動されると、可動部材６４は上下
動し、これに伴い連動部材５０が前後方向に移動する。
連動部材５０が前後方向に移動すると連動部材５０とレ
ンズ支持枠４６とはピン５１を介して連結されているの
で、マスタレンズ群３２を前後移動するようになる。こ
れによりマウント７６のフランジ面７８と図示しない焦
点面（ＣＣＤ）までの距離を微調整することができる。The operation of the preferred embodiment of the tracking mechanism of the camera according to the present invention constructed as described above is as follows. First, with the cover 74 shown in FIG. 2 removed, a minus driver or the like is inserted into the minus groove 60A of the adjusting screw 60 and the adjusting screw 60 is rotated clockwise or counterclockwise. When the adjusting screw 60 is rotated, the movable member 64 moves up and down, and accordingly, the interlocking member 50 moves in the front-rear direction.
When the interlocking member 50 moves in the front-rear direction, the interlocking member 50 and the lens support frame 46 are connected via the pin 51, so that the master lens group 32 moves back and forth. This allows the distance between the flange surface 78 of the mount 76 and the focal plane (CCD) (not shown) to be finely adjusted.
【００１３】前記実施例によれば、調整後はクリックボ
ール６８が調整ねじ６０のＶ溝ローレット６６に落ち込
んでねじ６０の回転を阻止するので、従来必要であった
固定用ねじが不要となる。前記実施例によれば、可動部
材６４の上下方向の移動量によってレンズ支持枠４６を
前後方向に移動するようにしたので、レンズ支持枠４６
はリニアに移動させることができ、トラッキング調整が
容易である。また、トラッキング量を多く必要とするレ
ンズにも適用することができる。According to the above-described embodiment, after the adjustment, the click ball 68 falls into the V-groove knurl 66 of the adjusting screw 60 to prevent the screw 60 from rotating, so that the fixing screw which has been conventionally required is not necessary. According to the above embodiment, the lens support frame 46 is moved in the front-rear direction according to the amount of movement of the movable member 64 in the vertical direction.
Can be moved linearly and tracking adjustment is easy. It can also be applied to lenses that require a large amount of tracking.
【００１４】前記実施例によれば、連動部材５０のテー
パ面５０Ａ、可動部材６４のテーパ面６４Ａのテーパ角
度を変えたり、調整ねじ６０のローレット数の増減によ
り、１クリックあたりの調整量を任意に調整することが
できる。前記実施例ではテレビレンズカメラのフランジ
バック調整について説明したのであるが、これに限定さ
れるものではなく通常のカメラのフランジバック調整に
ついても本発明に係るトラッキング機構は適用すること
ができる。According to the above-described embodiment, the amount of adjustment per click can be arbitrarily adjusted by changing the taper angle of the tapered surface 50A of the interlocking member 50 and the tapered surface 64A of the movable member 64, or by increasing or decreasing the number of knurls of the adjusting screw 60. Can be adjusted to. Although the flange back adjustment of the television lens camera has been described in the above embodiment, the present invention is not limited to this, and the tracking mechanism according to the present invention can be applied to the flange back adjustment of a normal camera.
【００１５】[0015]
【発明の効果】以上説明したように、本発明に係るカメ
ラのトラッキング機構によれば、レンズ支持枠を直線的
に変化させることができるのでトラッキング調整が容易
になる。As described above, according to the tracking mechanism of the camera of the present invention, the lens support frame can be linearly changed, so that the tracking adjustment becomes easy.
【図１】図１は本発明が適用されるテレビカメラの断面
図FIG. 1 is a sectional view of a television camera to which the present invention is applied.
【図２】図２は本発明のカメラのトラッキング機構の要
部を示す拡大断面図FIG. 2 is an enlarged sectional view showing a main part of a tracking mechanism of a camera of the present invention.
【図３】図３はクリック機構の構造を示す説明図FIG. 3 is an explanatory view showing the structure of a click mechanism.
【図４】図４は従来のトラッキング機構を示す拡大断面
図FIG. 4 is an enlarged cross-sectional view showing a conventional tracking mechanism.
【図５】図５は図４のＡ矢視図5 is a view taken in the direction of arrow A in FIG.
２０…レンズ鏡胴 ２２…固定鏡胴 ３２…マスタレンズ群 ４６…レンズ支持枠 ４８…トラッキング機構 ５０…連動部材 ６０…調整ねじ ６４…可動部材 ７８…フランジ面 20 ... Lens barrel 22 ... Fixed barrel 32 ... Master lens group 46 ... Lens support frame 48 ... Tracking mechanism 50 ... Interlocking member 60 ... Adjusting screw 64 ... Movable member 78 ... Flange surface
Claims (2)
胴の光軸に沿って前後方向に微調移動しながらトラッキ
ング調整を行うカメラのトラッキング機構に於いて、 前記レンズ鏡胴の光軸方向に沿って前後方向に移動可能
な連動部材を前記レンズ支持枠と連結し、光軸と直交す
る方向に移動可能な可動部材をテーパ面を介して前記連
動部材と接触させ、可動部材を光軸と直交する方向に移
動することにより連動部材を光軸に沿って前後移動さ
せ、レンズ支持枠を光軸に沿って前後移動させることを
特徴とするカメラのトラッキング機構。1. A tracking mechanism of a camera for performing tracking adjustment while finely moving a lens support frame for holding a lens along the optical axis of the lens barrel in the front-rear direction, in the optical axis direction of the lens barrel. An interlocking member movable in the front-rear direction along the lens support frame, a movable member movable in a direction orthogonal to the optical axis is brought into contact with the interlocking member via a tapered surface, and the movable member serves as the optical axis. A tracking mechanism for a camera, wherein the interlocking member is moved back and forth along the optical axis by moving in a direction orthogonal to each other, and the lens support frame is moved back and forth along the optical axis.
可動部材を光軸と直交する方向に移動させる調整ねじを
設け、この調整ねじには節度機構が設けられている請求
項１のカメラのトラッキング機構。2. The movable member is provided with an adjusting screw for moving the movable member in a direction orthogonal to the optical axis by being rotated, and the adjusting screw is provided with a moderating mechanism. Camera tracking mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7253744A JPH0996750A (en) | 1995-09-29 | 1995-09-29 | Tracking mechanism for camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7253744A JPH0996750A (en) | 1995-09-29 | 1995-09-29 | Tracking mechanism for camera |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0996750A true JPH0996750A (en) | 1997-04-08 |
Family
ID=17255543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7253744A Pending JPH0996750A (en) | 1995-09-29 | 1995-09-29 | Tracking mechanism for camera |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0996750A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100422846C (en) * | 2006-08-10 | 2008-10-01 | 张云 | Monorail swing and tilt big range changeable camera |
| WO2022201877A1 (en) * | 2021-03-23 | 2022-09-29 | 株式会社nittoh | Lens barrel |
-
1995
- 1995-09-29 JP JP7253744A patent/JPH0996750A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100422846C (en) * | 2006-08-10 | 2008-10-01 | 张云 | Monorail swing and tilt big range changeable camera |
| WO2022201877A1 (en) * | 2021-03-23 | 2022-09-29 | 株式会社nittoh | Lens barrel |
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