JPS59116635A - Electromagnetic shutter device - Google Patents

Abstract

PURPOSE:To make the photographing utilizing a focal depth possible, by fixing plural ferromagnetic bodies on the same radius of a movable coil member arranged between a fixed permanent magnet and a yoke, and providing a fixed electromagnet facing one ferromagnetic body to hold a diaphragm aperture. CONSTITUTION:When a release button is depressed, an aperture value and shutter operating seconds are calculated, and electric power is supplied to a fixed electromagnet 8 just before the power supply to a coil 6a of a movable coil member 6 in accordance with a program. Then, the attraction of the movable coil member 6 to a ferromagnetic body 7a for holding the initial state is released, and the movable coil member 6 becomes rotatable. Just after this release, the power supply to the coil 6a of the movable coil member 6 is strated, and an aperture shutter blade 9 starts opening in accordance with rotation of the movable coil member 6. When a proper aperture is attained, one of ferromagnetic bodies is attracted to fix an aperture diameter; and next, when electric power is supplied to the fixed electromagnet again, the aperture shutter blade 9 is closed.

Description

【発明の詳細な説明】 この発明は固定永久磁石と、可動コイル部材によって得
られる電磁力を駆動源としてシャ。DETAILED DESCRIPTION OF THE INVENTION The present invention uses electromagnetic force obtained by a fixed permanent magnet and a moving coil member as a driving source.

ター羽根を開閉作動する電磁シャッター装置に関するも
のである。This invention relates to an electromagnetic shutter device that opens and closes a tar blade.

一般に、電磁シャッター装置はシャツター羽根の駆動速
度や駆動方向等の制御が可動コイル部材に通電する電流
の方向、電流量によって行えるため、バネ力を駆動源＾
する機械シャッターのような複雑な機構が不要となるが
、従来知られていた電磁シャッター装置は絞り込み側か
ら開放側、開放側から絞り込み側への往復動は可能であ
った反面、特定の絞り径を維持させて開閉作動すること
は不可能であった。もちろん。Generally, in electromagnetic shutter devices, the driving speed and driving direction of the shutter blades can be controlled by the direction and amount of current flowing through the moving coil member, so the spring force is used as the driving source.
However, while conventional electromagnetic shutter devices were capable of reciprocating movement from the aperture side to the aperture side and from the aperture side to the aperture side, It was impossible to maintain the opening and closing operation. of course.

かかる機能も別に遅延ガバナー装置を併設することによ
り可能となるが、電磁シャック−の利点が失われること
となり好ましくなかった。従って、従来の電磁シャッタ
ー装置の場合には絞り効果つまり焦点深度の有効活用を
考慮した写真撮影は出来ないものとあきらめられていた
。Although such a function can be achieved by separately installing a delay governor device, the advantages of the electromagnetic shack are lost, which is not preferable. Therefore, in the case of conventional electromagnetic shutter devices, it has been given up on the idea that it is impossible to take photographs that take into account the effective use of the aperture effect, that is, the depth of focus.

この発明は上記の問題を解消しようとするもので、固定
永久磁石とこれに対向する継鉄の間に配置した可動コイ
ル部材の同一半径」二に複数個の強磁性体を固着すると
ともに該強磁性体の一つに対向する固定電磁石を設ける
という簡易な構成によって、絞り開口径を維持しくＭる
電磁シャッター装置を提供することを目的としている。This invention attempts to solve the above problem by fixing a plurality of ferromagnetic materials to the same radius of a moving coil member disposed between a fixed permanent magnet and a yoke facing the same, and It is an object of the present invention to provide an electromagnetic shutter device that maintains the aperture aperture diameter by a simple configuration in which a fixed electromagnet is provided facing one of the magnetic bodies.

次に、この発明を添付図面に示す一実施例にもとづいて
説明する。Next, the present invention will be described based on an embodiment shown in the accompanying drawings.

１は撮影レンズ（図示せず）の鏡枠、２は固定永久磁石
で、前記鏡枠ｌと一体形成された保持枠３に等配列膜さ
れている。４は前記固定永久磁石２の前面に吸着固定し
た継鉄、５は固定永久磁石２の後面に一定のギャップＧ
を介して吸着固定した継鉄である。該継鉄５と固定永久
磁石２とのギヤツブＧ内には鏡枠１を軸として回転でき
る可動コイル部材６が配設されている。Reference numeral 1 denotes a lens frame of a photographing lens (not shown), and 2 a fixed permanent magnet, which are arranged in equal arrangement on a holding frame 3 integrally formed with the lens frame I. 4 is a yoke fixed to the front surface of the fixed permanent magnet 2, and 5 is a fixed gap G on the rear surface of the fixed permanent magnet 2.
This is a yoke fixed by suction through the yoke. A movable coil member 6 that can rotate around the lens frame 1 is disposed within a gear G between the yoke 5 and the fixed permanent magnet 2.

該可動コイル部材６には駆動用コイル６ａが設けられて
おり、該コイル６ａと干渉しない位置の同−半径上には
絞り制御段数に応じた複数個（図においては４個）の強
磁性体７が固着されている。ここに使用する強磁性体７
としては軟鉄や高珪素鋼の薄板等を用いて満足できる。The movable coil member 6 is provided with a driving coil 6a, and a plurality of ferromagnetic materials (four in the figure) according to the number of aperture control stages are arranged on the same radius at a position that does not interfere with the coil 6a. 7 is fixed. Ferromagnetic material 7 used here
As such, a thin plate of soft iron or high-silicon steel can be used satisfactorily.

８は前記可動コイル部材６に固着された強磁性体７の一
つに対向するように設けた固定電磁石で。8 is a fixed electromagnet provided so as to face one of the ferromagnetic bodies 7 fixed to the movable coil member 6;

該固定電磁石８は前記固定永久磁石２の保持枠３に取付
けられている。９は絞りシャッター羽根で、該絞りシャ
ッター羽根９は継鉄５と、これに一定の間隔を隔ててネ
ジ（図示せず）等によって固定された押え板１０との間
に軸１１を介して枢着され、かつ前記可動コイル部材６
に植設したビン１２に係合し、可動コイル部材６の回転
に連動して開閉作動するようになっている。The fixed electromagnet 8 is attached to the holding frame 3 of the fixed permanent magnet 2. Reference numeral 9 denotes an aperture shutter blade, and the aperture shutter blade 9 is pivoted via a shaft 11 between the yoke 5 and a presser plate 10 fixed to the yoke 5 with a screw (not shown) or the like at a certain interval. and the movable coil member 6
It engages with a bottle 12 implanted in the movable coil member 6, and opens and closes in conjunction with the rotation of the movable coil member 6.

次に、この発明に係る電磁シャッター装置を組み込んだ
カメラの作動について説明する。Next, the operation of a camera incorporating the electromagnetic shutter device according to the present invention will be explained.

まず、カメラを被写体に向けてレリーズボタン（図示せ
ず）を押すと、被写体輝度に応じて露出制御回路（図示
せず）により絞り値やシャック−秒時が算出される。こ
れによって、既に定まったプログラムに従って可動コイ
ル部材６のコイル６ａに通電される寸前に固定電磁石８
に通電される。この固定電磁石８は永久磁石８ａと組合
わされたもので、無通電時には永久磁石８ａが働き９強
磁性体７の一つを吸着しており。First, when the camera is pointed at a subject and a release button (not shown) is pressed, an exposure control circuit (not shown) calculates an aperture value and a shutter speed according to the brightness of the subject. As a result, the fixed electromagnet 8 is just before the coil 6a of the movable coil member 6 is energized according to a predetermined program.
is energized. This fixed electromagnet 8 is combined with a permanent magnet 8a, and when no current is applied, the permanent magnet 8a works to attract one of the ferromagnetic materials 7.

通電時には永久磁石８ａの磁力を打消すように働く、　
所謂ＯＮタイプ電磁石が用いられている。従って、上述
のように固定電磁石８に通電されることによって、初期
位置保持用の強磁性体７ａとの吸着力を解除するから、
可動コイル部材６は回転作動可能となる。その直後、可
動コイル部材６のコイル６ａに通電が開始され。When energized, it acts to cancel the magnetic force of the permanent magnet 8a.
A so-called ON type electromagnet is used. Therefore, by energizing the fixed electromagnet 8 as described above, the attraction force with the ferromagnetic body 7a for holding the initial position is released.
The movable coil member 6 becomes rotatable. Immediately after that, energization of the coil 6a of the movable coil member 6 is started.

該可動コイル部材６の回転に連動して絞りシャッター羽
根９が開放し始める。しかして、該絞りシャッター羽根
９による開口径にて適正露出が得られると、その瞬間、
可動コイル部材６と固定電磁石８への通電が遮断され、
該固定電磁石８の永久磁石８ａが働いて強磁性体７の一
つを吸着し、この時点で絞り径が固定される。続いて、
固定電磁石８に再び通電され、可動コイル部材６が回転
可能となると、該可動コイル部材６のコイル６ａには反
転した電流が通電されるので、絞りシャッター羽根９は
閉口する。In conjunction with the rotation of the movable coil member 6, the aperture shutter blades 9 begin to open. When proper exposure is obtained with the aperture diameter of the aperture shutter blades 9, at that moment,
Power to the moving coil member 6 and the fixed electromagnet 8 is cut off,
The permanent magnet 8a of the fixed electromagnet 8 works to attract one of the ferromagnetic bodies 7, and at this point the aperture diameter is fixed. continue,
When the fixed electromagnet 8 is energized again and the movable coil member 6 becomes rotatable, an inverted current is energized to the coil 6a of the movable coil member 6, so that the aperture shutter blade 9 closes.

この考案は上記の如く作用するから、可動コイル部１Ｉ
Ａ６に固着した複数個の強磁性体７を例えばａ〜ｄの４
つ配置しておき、ａを初期位置保持用、ｂを絞りＦＩＬ
の制御用、Ｃを絞りＦ５．６の制御用、ｄを絞りＦ２．
８の制御用として定めておけば、この強磁性体７に対応
する位置に可動コイル部材６が回転して来たときに固定
電磁石８と可動コイル部材のコイル６ａへの通電を遮断
すれば絞り開口径とシャッター秒時とを同時に制御する
ことが可能となり、従来の電磁シャッター装置により不
可能であった絞り優先自動露出制御が可能となるほか、
一般的な絞り２秒時組合わせ自動露出制御、マニュアル
制御も可能となる。Since this device works as described above, the movable coil portion 1I
For example, a plurality of ferromagnetic materials 7 fixed to A6 are
A is for holding the initial position, and b is the aperture filter.
, C is apertured to control F5.6, d is apertured to F2.
8, when the movable coil member 6 rotates to a position corresponding to this ferromagnetic body 7, if the power supply to the fixed electromagnet 8 and the coil 6a of the movable coil member is cut off, the aperture is stopped. It is now possible to control the aperture diameter and shutter speed simultaneously, making it possible to perform aperture-priority automatic exposure control, which was not possible with conventional electromagnetic shutter devices.
General 2-second aperture combination automatic exposure control and manual control are also possible.

このように、この発明によれば、ＷＩ易な構成によって
絞り開口径を維持したシャッターの開閉作動ができる上
に、いくつかのプログラム露出制御方式が任意に選択で
きるなどのすぐれた効果を奏するものである。As described above, according to the present invention, the shutter can be opened and closed while maintaining the diaphragm aperture diameter with an easy-to-use configuration, and several program exposure control methods can be arbitrarily selected. It is.

【図面の簡単な説明】[Brief explanation of the drawing]

図はこの発明の一実施例を示し、第１図は要部の断面側
面図、第２図は可動コイル部材の正面図である。 ２−固定永久磁石　　　４．５−継鉄 ６−可動コイル部材　　７−　　強磁性体８−固定電磁
石 特許出願人　　　　　小西六写真工業株式会社手続省Ｔ
Ｔ正８：（方式） 昭和５８年　４月２８日 特許庁長官　　若　杉　和　夫　　殿 １−事件の表示 昭和５７年特許願第２２５０５９号 ２−発明の名称 電磁蛾弘シャッター装置 ３−？ｍ正をする者 事件との関係　　特許出願人 住所　　東京都新宿区西新宿１丁目２６番２号名称　　
小西六写真工業株式会社 代表者用本信彦 ４−代理人 ■１５１ 住所　　東京都渋谷区代々木２丁目５番１号６−補正の
対象　　　　願書及び明細書７−補正の内容The drawings show an embodiment of the present invention, in which FIG. 1 is a sectional side view of a main part, and FIG. 2 is a front view of a moving coil member. 2-Fixed permanent magnet 4.5-Yoke 6-Movable coil member 7-Ferromagnetic material 8-Fixed electromagnet Patent applicant Konishiroku Photo Industry Co., Ltd. Ministry of Procedure T
T-Sho 8: (Method) April 28, 1980 Director-General of the Patent Office Kazuo Wakasugi 1 - Indication of the case 1983 Patent Application No. 225059 2 - Name of the invention Electromagnetic Mohhiro Shutter Device 3 -? Relationship with the case of a person who commits m-correction Patent applicant address 1-26-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo Name
Konishi Roku Photo Industry Co., Ltd. Representative Nobuhiko Moto 4 - Agent ■ 151 Address 2-5-1-6 Yoyogi, Shibuya-ku, Tokyo - Subject of amendment Application and specification 7 - Contents of amendment

Claims (1)

【特許請求の範囲】[Claims] 固定永久磁石と、これに対向する継鉄との間に配置した
可動コイル部材の同一半径上に複数個の強磁性体を固着
するとともに、該強磁性体の一つに対向する固定電磁石
を設けたことを特徴とする電磁シャッター装置。A plurality of ferromagnetic bodies are fixed on the same radius of a moving coil member disposed between a fixed permanent magnet and a yoke facing thereto, and a fixed electromagnet is provided facing one of the ferromagnetic bodies. An electromagnetic shutter device characterized by: