JPH02226130A - Light quantity controller - Google Patents
Light quantity controllerInfo
- Publication number
- JPH02226130A JPH02226130A JP1045115A JP4511589A JPH02226130A JP H02226130 A JPH02226130 A JP H02226130A JP 1045115 A JP1045115 A JP 1045115A JP 4511589 A JP4511589 A JP 4511589A JP H02226130 A JPH02226130 A JP H02226130A
- Authority
- JP
- Japan
- Prior art keywords
- light quantity
- quantity control
- control member
- amount control
- light amount
- 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
- 239000003302 ferromagnetic material Substances 0.000 claims description 3
- 230000005291 magnetic effect Effects 0.000 abstract description 11
- 230000005540 biological transmission Effects 0.000 abstract description 7
- 238000001514 detection method Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Landscapes
- Diaphragms For Cameras (AREA)
- Shutters For Cameras (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、ビデオカメラ等の撮影機器に装備される光量
制御装置に関するものでるる。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a light amount control device installed in a photographing device such as a video camera.
〈従来の技術〉
従来、この種の装置は例えば第４図に示すように構成さ
れていた。すなわち、開口部１ａｅ有するカバー１と各
部品の基盤になる開口部５ａＴｈ有する地板５との間に
光量制御部材としての絞り羽根２，３？保持しかつ該地
板５の外面に設けた駆動部６の回動によりアーム４を介
して該絞り羽根２．３全スライド可能になし、また、該
絞り羽根２．３はそれぞれ該カバー１に形成したレール
１ｂと該地板５に形成したレール５ｂに摺接されている
。<Prior Art> Conventionally, this type of apparatus has been configured as shown in FIG. 4, for example. That is, the aperture blades 2 and 3 as light amount control members are interposed between the cover 1 having the opening 1ae and the base plate 5 having the opening 5aTh, which is the base of each component. The aperture blades 2.3 are held and rotated by a drive unit 6 provided on the outer surface of the base plate 5 so that the aperture blades 2.3 can fully slide through the arm 4, and each of the aperture blades 2.3 is formed on the cover 1. It is in sliding contact with the rail 1b formed on the base plate 5 and the rail 5b formed on the base plate 5.
〈発明が解決しようとする課題〉 ところが、前述従来例では次のような欠点がろった。<Problem that the invention seeks to solve> However, the conventional example described above has the following drawbacks.
（１） 絞９羽根２，３が互いに摺動するので、摩擦
による４二が犬きくなる。(1) Since the 9 diaphragm blades 2 and 3 slide against each other, the 42 caused by friction becomes more intense.
（２）絞ジ羽根２，３が地板５あるいはカバー１と摺接
するので、摩擦による負荷が大きくなる。(2) Since the aperture blades 2 and 3 come into sliding contact with the base plate 5 or the cover 1, the load due to friction increases.
（３）駆動部と絞り羽根が別れているために、駆動力の
伝達効率が低く、伝達部などの部品数が多くなる。(3) Since the drive section and the aperture blades are separate, the efficiency of driving force transmission is low and the number of parts such as the transmission section increases.
本発明は、前述従来例の欠点全除去し、光量制御部材の
摩擦負荷がなく、駆動力の伝達効率を高くシ次光量制御
装置全提供することを目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to provide a sequential light amount control device which eliminates all of the drawbacks of the prior art, has no frictional load on the light amount control member, and has high driving force transmission efficiency.
〈課題を解決するための手段〉
前記の目的を達成するために、本発明は強磁性材料から
なりかつ互いに相反発するように着磁された複数の光量
制御部材と、該複数の光量制御部材に対向配置されかつ
互いに相反発するように着磁された光量制御部材支持マ
グネットと、該光量制御部材の磁力全利用して該光量制
御部材全移動制御する駆動機構とを備えたものである。<Means for Solving the Problems> In order to achieve the above object, the present invention includes a plurality of light amount control members made of a ferromagnetic material and magnetized so as to emit light in opposition to each other; This device includes light amount control member support magnets that are arranged opposite to each other and magnetized to emit light in opposition to each other, and a drive mechanism that controls the entire movement of the light amount control member by fully utilizing the magnetic force of the light amount control member.
く作用〉
以上の構成の光量制御装置は光量制御部材が磁力の反発
力で支持されているために、摩擦負荷がなくなり、また
、光量制御部材と駆動機構と’ｋ −体にしたことによ
り、駆動力の伝達効率を高くし、装置を簡略化する。In the light amount control device with the above configuration, since the light amount control member is supported by the repulsive force of the magnetic force, there is no frictional load, and since the light amount control member and the drive mechanism are made into a 'k-body', Improve the transmission efficiency of driving force and simplify the device.
〈実施例〉
以下、本発明の実施例を第１図ないし第３図に基づいて
説明する。<Example> Hereinafter, an example of the present invention will be described based on FIGS. 1 to 3.
カバー１１には開口部１１ａ ｋ有し、その内面側に該
開口部１１ａ ？はさんで一対の光量制御部材支持マグ
ネット１２ａ 、 １２ｂと光量制御部材１６を移動制
御するための駆動コイル１３．速度検出コイル１４及び
バックヨーク１５が装着されている。The cover 11 has an opening 11a on its inner surface. A pair of light amount control member support magnets 12a, 12b and a drive coil 13 for controlling the movement of the light amount control member 16 are sandwiched therebetween. A speed detection coil 14 and a back yoke 15 are attached.
一方、基盤となる地板２２には開口部２２ａ ｋ有し、
その内面側に該開口部２２ａ ｋはさんで一対の光量制
御部材支褥マグネット２１ａ、２１ｂと光量制御部材１
７を移動制御するための駆動コイル１８．速度検出コイ
ル１９及びバックヨーク２０が装着されている。On the other hand, the base plate 22 serving as the base has an opening 22a k,
A pair of light amount control member supporting magnets 21a, 21b and the light amount control member 1 are sandwiched between the openings 22a and 22k on the inner surface thereof.
A drive coil 18 for controlling the movement of 7. A speed detection coil 19 and a back yoke 20 are attached.
そして、該光量制御部材１６．１７は該カバー１１と地
板２２の間に配設され、それぞれ開口部１６ａ 、 １
７ａ ｋ有するとともに互いに相反発するように着磁さ
れており、また、該光量制御部材支持マグネット１２ａ
、 １２ｂ及び２１ａ 、 ２１ｂも互いに相反発す
るように着磁されている。The light amount control members 16 and 17 are disposed between the cover 11 and the base plate 22, and have openings 16a and 1, respectively.
7a and 7a, and are magnetized so that they emit light in opposition to each other, and the light quantity control member support magnet 12a
, 12b and 21a, 21b are also magnetized so that they emit light in opposition to each other.
以上の構成の本実施例において、光量制御部材１６．１
７はそれぞれ光量制御部材支持マグネツ） １２ａ 、
１２ｂ及び２ｉａ 、 ２１ｂの磁力と光量制御部材
１６．１７のもつ磁力の反発により浮上した状態にアリ
、非接触となっている。In this embodiment with the above configuration, the light amount control member 16.1
7 are light amount control member supporting magnets) 12a,
Due to the repulsion between the magnetic force of 12b, 2ia, and 21b and the magnetic force of the light quantity control members 16 and 17, they are in a floating state and are not in contact.
そこで、駆動コイル１３．１８に電流が流れると、光量
制御部材１６．１７のもつ磁力とから駆動力が発生し、
光量制御部材１６．１７が互いに反対方向にスライドす
る。このとき、速度検出コイル１４．１９にはそれぞれ
光量制御部材１６゜１７の磁力により、光量制御部材１
６．１７の移動速度に比例した逆起電力が発生し、この
信号を利用して速度制御を行うことができる。Therefore, when a current flows through the drive coil 13.18, a driving force is generated from the magnetic force of the light amount control member 16.17.
The light control members 16, 17 slide in opposite directions. At this time, the speed detection coils 14 and 19 are caused by the magnetic force of the light amount control members 16 and 17, respectively.
A back electromotive force proportional to the moving speed of 6.17 is generated, and this signal can be used to control the speed.
〈発明の効果〉
本発明は、以上説明したように強磁性材料からなりかつ
互いに相反発するように着磁された複数の光量制御部材
と該複数の光量制御部材に対向配置されかつ互いに相反
発するように着磁された光量制御部材支持マグネットと
該光量制御部材を移動制御する駆動機構とを備えること
により、光量制御部材は非接触となって摩擦負荷が無く
なフ、駆動力の損失がほとんどなく、微少駆動力で動作
することができ、ま念、摩擦による負荷変動がなく高精
度の制御が可能となる効果がある。さらに、駆動力全光
量制御部材黍論から得°ることかでき、駆動力の伝達効
率が非常に高くなり、装置の簡略化ができる。<Effects of the Invention> As explained above, the present invention provides a plurality of light amount control members made of a ferromagnetic material and magnetized so as to emit light in opposition to each other, and a plurality of light amount control members disposed opposite to the plurality of light amount control members so as to emit light in opposition to each other. By providing a light amount control member supporting magnet that is magnetized to a magnet and a drive mechanism that controls the movement of the light amount control member, the light amount control member becomes non-contact and there is no frictional load, resulting in almost no loss of driving force. , it can operate with a minute driving force, and has the effect of enabling high-precision control without load fluctuations due to friction. Furthermore, since the driving force can be obtained from the total light amount control member theory, the driving force transmission efficiency is extremely high, and the device can be simplified.
第１図は本発明に係る実施例の光量制御装置の分解斜視
図、第２図はその断面図、第３図はその動作説明図、第
４図は従来例の光量制御装置の分解斜視図である。
ｉ ｉ −・・カバー １２ａ 、 １２ｂ 、 ２１
ａ 、 ２１ｂ −・・光量制御部材支持マグネット、
１３．１８・・・駆動コイル、１４．１９・・・速度検
出コイル、１５．２０・・・バックヨーク、１６．１７
・・・光量制御部材、２２・・・地板。
第
図
拾）−速度検圧コイノＬ
１明−ｉｔ刊伸舒材
２ａ
ｎ・−・を匁
弔
図
第３図FIG. 1 is an exploded perspective view of a light amount control device according to an embodiment of the present invention, FIG. 2 is a sectional view thereof, FIG. 3 is an explanatory diagram of its operation, and FIG. 4 is an exploded perspective view of a conventional light amount control device. It is. i i - Cover 12a, 12b, 21
a, 21b--light amount control member support magnet,
13.18... Drive coil, 14.19... Speed detection coil, 15.20... Back yoke, 16.17
. . . Light amount control member, 22 . . . Base plate. Figure 1) - Speed detection Koino L 1 Ming-it publication Shinshu material 2a n... Figure 3
Claims (1)
磁された複数の光量制御部材と、該複数の光量制御部材
に対向配置されかつ互いに相反発するように着磁された
光量制御部材支持マグネットと、該光量制御部材を移動
制御する駆動機構とを備えたことを特徴とする磁気浮上
リニア式の光量制御装置。1. A plurality of light quantity control members made of ferromagnetic material and magnetized so as to emit light reciprocally with each other, and a light quantity control member support magnet disposed opposite to the plurality of light quantity control members and magnetized so as to emit light reciprocally with each other; 1. A magnetically levitated linear light amount control device, comprising: a drive mechanism that controls the movement of the light amount control member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1045115A JPH02226130A (en) | 1989-02-28 | 1989-02-28 | Light quantity controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1045115A JPH02226130A (en) | 1989-02-28 | 1989-02-28 | Light quantity controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02226130A true JPH02226130A (en) | 1990-09-07 |
Family
ID=12710267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1045115A Pending JPH02226130A (en) | 1989-02-28 | 1989-02-28 | Light quantity controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02226130A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2341381A1 (en) * | 2009-12-15 | 2011-07-06 | Dialog Imaging Systems GmbH | Drop detection using lens position sensing of camera module |
| EP2345930A1 (en) * | 2010-01-19 | 2011-07-20 | Dialog Imaging Systems GmbH | Camera shutter and position control thereof |
| EP2345929A1 (en) * | 2010-01-19 | 2011-07-20 | Dialog Imaging Systems GmbH | Camera shutter |
-
1989
- 1989-02-28 JP JP1045115A patent/JPH02226130A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2341381A1 (en) * | 2009-12-15 | 2011-07-06 | Dialog Imaging Systems GmbH | Drop detection using lens position sensing of camera module |
| US8180211B2 (en) | 2009-12-15 | 2012-05-15 | Digital Imaging Systems Gmbh | Drop detection using lens position sensing of camera module |
| EP2345930A1 (en) * | 2010-01-19 | 2011-07-20 | Dialog Imaging Systems GmbH | Camera shutter and position control thereof |
| EP2345929A1 (en) * | 2010-01-19 | 2011-07-20 | Dialog Imaging Systems GmbH | Camera shutter |
| US8547477B2 (en) | 2010-01-19 | 2013-10-01 | Rpx Corporation | Camera shutter and position control thereof |
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