JP2525459B2

JP2525459B2 - Shattered

Info

Publication number: JP2525459B2
Application number: JP63136903A
Authority: JP
Inventors: 靖宏豊田; 圭介青山
Original assignee: Canon Inc
Current assignee: Canon Inc
Priority date: 1988-06-02
Filing date: 1988-06-02
Publication date: 1996-08-21
Anticipated expiration: 2011-08-21
Also published as: JPH01304437A

Description

【発明の詳細な説明】［産業上の利用分野］本発明は、シヤツタ羽根を往復走行させ、往路，復路
共に露光を行わせるシヤツタに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a shutter that causes a shutter blade to reciprocate to perform exposure on both the forward and return paths.

［従来の技術］従来の、往路で露光、復路で走行準備位置に遮光状態
のままセツトされる電磁駆動シヤツタでは、適正な露光
秒時を得るために、走行準備状態から、先羽根駆動用電
磁駆動源へ通電を開始し、所定の露光秒時とそのシヤツ
タユニツト特有の調整秒時を考慮した時間後、後羽根駆
動用電磁駆動源へ通電を行い露光を終了させるように構
成されている。[Prior Art] In the conventional electromagnetic drive shutter in which the exposure is performed on the forward path and the light is shielded to the travel preparation position on the return path, in order to obtain an appropriate exposure time, the electromagnetic wave for driving the leading blade is changed from the travel preparation state. The drive source is energized, and after a predetermined exposure time and the adjustment time peculiar to the shutter unit are taken into consideration, power is supplied to the trailing blade driving electromagnetic drive source to terminate the exposure.

［発明が解決しようとしている問題点］しかしながら、往路，復路共に露光を行わせる電磁駆
動シヤツタでは、往路の露光が適性になるように設定さ
れた通電信号（即ち“所定の露光秒時＋調整秒時”）で
先羽根用と後羽根用電磁駆動源への通電順序を入れ換え
て復路の露光を行った場合、双方の電極駆動源の特性の
微妙な差、回転方向の違いによる同一電磁駆動源自体の
特性の差、羽根走行方向の違いによる羽根作動負荷の差
等により、適正な露光秒時精度が得られないという欠点
があった。[Problems to be Solved by the Invention] However, in an electromagnetic drive shutter that performs exposure on both the forward and backward paths, an energization signal (that is, "predetermined exposure time + adjustment time) set so that the exposure on the outward path is appropriate. When exposure is performed on the return path by switching the energization order to the front and rear blade electromagnetic drive sources at the time "), the same electromagnetic drive source due to subtle differences in characteristics of both electrode drive sources and differences in rotation direction. Due to the difference in the characteristics of the blade itself, the difference in the blade working load due to the difference in the blade traveling direction, and the like, there is a drawback that an appropriate exposure time accuracy cannot be obtained.

［問題点を解決するための手段］本発明によれば、走行特性等を加味した補正を往路，
復路で各々持ち、羽根の走行方向により切り換えて露光
秒時制御を行うことで、往路，復路共に適正な露光秒時
精度が得られるようにしたものである。[Means for Solving Problems] According to the present invention, the correction in which the traveling characteristics and the like are taken into consideration
By holding each on the return path and performing exposure time control by switching according to the traveling direction of the blades, appropriate exposure time accuracy can be obtained for both the forward and return paths.

［実施例］第１図〜第10図は本発明を適用した往路，復路共に露
光を行なう電磁駆動シヤツタの実施例で、第１図はこの
電磁駆動シヤツタの全体を表わした斜視図（往路走行開
始前或は復路走行完了状態）、第２図は第１図と同じ状
態のシヤツタの正面図、第３図は第２図の状態に於て、
シヤツタ羽根群の作動制御を行なう電磁駆動源部分を取
り除いたものを示す正面図（羽根駆動レバー、ブレーキ
機構、信号接片等が見えている）、第４〜６図は羽根駆
動レバーとブレーキ機構との動きを示した正面図で、電
磁駆動源部分を省略して表わしている。そのうち、第４
図はスリツト露光開始直後を示し、第５図は同じくスリ
ツト露光の後半途中を、第６図は全開露光状態を示して
いる。第７図は往路走行完了、或は復路走行開始前状態
を示すシヤツタの正面図、第８図は第７図の状態に於て
電磁駆動源部分を取り除いたものを示す正面図。[Embodiment] FIGS. 1 to 10 show an embodiment of an electromagnetically driven shutter for performing exposure on both forward and backward paths to which the present invention is applied. FIG. 1 is a perspective view showing the whole of the electromagnetically driven shutter (forward travel). (Before start or completion of return trip), FIG. 2 is a front view of the shutter in the same state as FIG. 1, and FIG. 3 is the state of FIG.
The front view (the blade drive lever, the brake mechanism, the signal contact piece, etc. are visible) showing the one in which the electromagnetic drive source portion for controlling the operation of the shutter blades is removed, and FIGS. 4 to 6 are the blade drive lever and the brake mechanism. In the front view showing the movements of and, the electromagnetic drive source portion is omitted. Of which, the fourth
The figure shows the state immediately after the start of the slit exposure, FIG. 5 shows the latter half of the same, and FIG. 6 shows the fully open state. FIG. 7 is a front view of the shutter showing a state before traveling on the outward route or before starting traveling on the backward route, and FIG. 8 is a front view showing the state in which the electromagnetic drive source portion is removed in the state of FIG.

これらの図に於て、１はシヤツタ地板であり、平面略
中央には開口部1aが設けられている。２はシヤツタ地板
１に対向して一定の間隙を保つように取り付けられてい
るカバー板で、開口部1aに対応した位置に同様な開口部
（不図示）を有している。このシヤツタ地板１とカバー
板２との間には、羽根群３及び羽根群４が間に仕切板５
（開口部1aに対応した位置に開口部5aを有している）を
挟んで設けられ、それぞれ２本の羽根アーム６及び７
（羽根群３の羽根アームは不図示）と公知のリンク機構
の作動により開口部の開閉を行なうように構成されてい
る。８は羽根と羽根アームとを回動可能に結合させるた
めの羽根ダボ、羽根ユニツトとしては両羽根群3,4共に
同様な構造となっている。In these figures, reference numeral 1 is a shatter base plate, and an opening 1a is provided at the substantial center of the plane. Reference numeral 2 is a cover plate which is attached so as to face the shutter base plate 1 so as to maintain a constant gap, and has a similar opening (not shown) at a position corresponding to the opening 1a. A blade group 3 and a blade group 4 are provided between the shutter base plate 1 and the cover plate 2 to form a partition plate 5 therebetween.
Two blade arms 6 and 7 are provided so as to sandwich (having an opening 5a at a position corresponding to the opening 1a).
(The blade arm of the blade group 3 is not shown) and a known link mechanism is operated to open and close the opening. Reference numeral 8 denotes a blade dowel for rotatably connecting the blade and the blade arm, and both blade groups 3 and 4 have the same structure as a blade unit.

ここで、羽根群３の駆動に関するものと、羽根群４の
駆動に関するものは、ほぼ同様の構造及び作動を行なう
ので、以下、羽根群４の駆動に関する部分の番号は、対
応する羽根群３の駆動に関するものの番号に100を加え
た数字で表わし、羽根群４の駆動に関するものの詳しい
説明は省略する。Here, since the structure related to the driving of the blade group 3 and the structure related to the driving of the blade group 4 have substantially the same structure and operation, hereinafter, the numbers of the parts related to the driving of the blade group 4 are the same as those of the corresponding blade group 3. It is represented by a number obtained by adding 100 to the number related to the driving, and the detailed description regarding the driving of the blade group 4 will be omitted.

９は駆動レバーで、羽根アームとピン9aで連結してお
り、軸Ｐの周りに回動することによって羽根群３を開閉
駆動する。また、レバーの中央付近に駆動力の伝達を受
ける孔部9bを有しており、伝達側のピン（連結レバー10
の下面に植設され、図上では連結レバーの上面に植設さ
れたピン10cと同位置にて同径）と軸Ｐ周りの回転方向
に所定の遊びをもって係合している。10は連結レバー
で、電磁駆動源の出力軸（Ｐと同軸）と直結しており、
電磁駆動源の軸Ｐ周りの回転力を前記ピン10cの下面伝
達側ピンにて駆動レバー９に伝達すると共に、下側立曲
げ部10a,10bによってブレーキレバー11上のバネ性を有
した（第３図に於て、矢印Ａ方向にバネ性を持ち、Ａと
直角方向には撓みにくい）腕部11a及び11bと係合して、
ブレーキレバー11を軸Ｒの周りに所定方向で所定角度回
動し、羽根群３の走行開始時のストツパ解除と走行完了
時のブレーキ効果の発生を行なう。ブレーキレバー11は
前記の構造に加えて、駆動レバー９のピン9aの側面に作
用し、ストツパとブレーキの役目をする突起部11c,11d
と、軸Ｒ周りの回動習性を与えられるバネ15の力を受け
る腕部11eとを有している。12はブレーキレバー11の側
面に当接し、ブレーキレバー11の時計方向の回動を規制
するストツパピン。13は同じくブレーキレバー11の反時
計方向の回動を規制するストツパピン。14は揺動レバー
で、軸Ｔの周りに回動可能に枢支され、レバーの先端に
ブレーキレバー11,111に対してそれぞれ軸Ｒ及び軸Ｓ周
りの回動習性を与えるバネ15を支持しており、このバネ
15のバネ力のバランスにより軸Ｔ周りの回動を行なう。
16,17はゴムストツパで、駆動レバーのピン9aの側面に
作用し、羽根走行終了時の羽根へのシヨツクを緩和す
る。18は電磁駆動源用地板でプラスチツク等の絶縁及び
非磁性材料でできており、上側に羽根群の駆動及び制御
を行なう電磁駆動源MG1,MG2を、下側に羽根群の走行状
態を検知する信号接片19,20及び119,120が配置され、ビ
ス21によりシヤツタ地板１に植設された支柱22に固定さ
れている。ここで信号接片19,20はその基部を上記地板1
8に支持され、先端を地板18の下側に植設されたピン23
にプリテンシヨンをもって当接して位置を決められてい
る。そして、その位置はピン10cの軸Ｐ周りの回動領域
内にあり、羽根群３の開閉動作に対応して、接点がON−
OFFすることにより羽根群の走行状態を検知する。24は
電磁駆動源MG1のヨーク、25は永久磁石で、図の上下方
向に磁化されている。26は可動コイルで、軸Ｐの周りに
回動可能に枢支され、電気を流すことにより、電磁気力
が発生し、回転力を生み出す。いわゆるメータータイプ
の電磁駆動源を形成している。そして、前述した接点の
ON−OFFを検知してコイルへの電流の向きを反転させ往
復動するようにしている。27は電磁駆動源MG1を電磁駆
動源用地板18に固定するための押え板であり、ビス28に
より該地板18に結合される。A driving lever 9 is connected to the blade arm by a pin 9a, and rotates around the axis P to open / close the blade group 3. Further, a hole 9b for receiving the driving force is provided near the center of the lever, and the pin on the transmission side (connecting lever 10
Of the pin 10c, which is planted on the lower surface of the coupling lever and is planted on the upper surface of the coupling lever at the same position as the pin 10c in the figure), engages with a predetermined play in the rotational direction about the axis P. 10 is a connecting lever, which is directly connected to the output shaft (coaxial with P) of the electromagnetic drive source,
Rotational force about the axis P of the electromagnetic drive source is transmitted to the drive lever 9 by the lower surface transmission side pin of the pin 10c, and the lower vertical bending portions 10a and 10b have a spring property on the brake lever 11 ( In FIG. 3, it has a spring property in the direction of arrow A and is hard to bend in the direction perpendicular to A) Engage with arm parts 11a and 11b,
The brake lever 11 is rotated around the axis R in a predetermined direction by a predetermined angle to release the stopper at the start of traveling of the blade group 3 and to generate a braking effect at the completion of traveling. In addition to the structure described above, the brake lever 11 acts on the side surface of the pin 9a of the drive lever 9 and serves as a stopper and a protrusion for the projections 11c and 11d.
And an arm portion 11e that receives the force of the spring 15 that gives a turning tendency around the axis R. Numeral 12 is a stopper pin that contacts the side surface of the brake lever 11 and restricts the clockwise rotation of the brake lever 11. Similarly, 13 is a stopper pin that restricts the counterclockwise rotation of the brake lever 11. Reference numeral 14 denotes a swing lever, which is rotatably supported about an axis T, and supports a spring 15 at the tip of the lever, which gives the brake levers 11 and 111 rotational habits about the axis R and the axis S, respectively. , This spring
It rotates about the axis T by the balance of the spring force of 15.
Reference numerals 16 and 17 denote rubber stoppers that act on the side surface of the pin 9a of the drive lever and alleviate the shock to the blade at the end of traveling of the blade. Reference numeral 18 denotes a ground plate for an electromagnetic drive source, which is made of an insulating and non-magnetic material such as plastic. The electromagnetic drive sources MG1 and MG2 for driving and controlling the blade group are on the upper side and the traveling state of the blade group is on the lower side. The signal contact pieces 19, 20 and 119, 120 are arranged and fixed to the pillars 22 planted in the shutter base plate 1 with screws 21. Here, the signal contact pieces 19 and 20 have their bases at the base plate 1
The pin 23 is supported by 8 and the tip is planted under the ground plate 18.
The position is determined by abutting with pretension. Then, the position is within the rotation area of the pin 10c around the axis P, and the contact is turned ON-corresponding to the opening / closing operation of the blade group 3.
By turning OFF, the running state of the blade group is detected. Reference numeral 24 is a yoke of the electromagnetic drive source MG1, and 25 is a permanent magnet, which is magnetized in the vertical direction in the figure. Reference numeral 26 denotes a movable coil, which is rotatably supported around an axis P, and when an electric current is applied, an electromagnetic force is generated to generate a rotational force. It forms a so-called meter-type electromagnetic drive source. And of the above-mentioned contact
By detecting ON-OFF, the direction of the current to the coil is reversed and the coil reciprocates. Reference numeral 27 is a holding plate for fixing the electromagnetic drive source MG1 to the electromagnetic drive source base plate 18, and is connected to the base plate 18 with screws 28.

第９図は本実施例の電気的な構成を示すブロツク図で
ある。PRSは制御回路で、例えば内部にCPU（中央演算処
理部）RAM、ROM、入出力ポート、タイマー回路等が配置
された１チツプマイクロコンピユータであり、前記ROM
内には、シヤツター制御等のソフトウエア及びパラメー
タが格納されている。入出力ポートはシヤツターの状態
を検知するスイツチの入力や、シヤツター通電信号の出
力等を行なう。タイマー回路は設定した時間のカウント
を行ない、シヤツター制御の計時等を行なう。SHTはシ
ヤツター制御回路で、制御回路PRSからの制御信号SSHT
1,SSHT2及び走行方向信号SDIRによりそれぞれ電磁駆動
源MG1,MG2に通電を行なう。電磁駆動源MG1に通電を行な
うと、走行方向信号SDIRで指定した方向に羽根群３が走
行する。通電開始から羽根群３が走行完了するまでの時
間が経過した後、通電を停止する。羽根群４についても
同様で、SSHT2信号でMG2に通電されると羽根群４が駆動
される。FIG. 9 is a block diagram showing the electrical construction of this embodiment. PRS is a control circuit, which is, for example, a one-chip microcomputer in which CPU (central processing unit) RAM, ROM, input / output port, timer circuit, etc. are arranged.
Software such as shutter control and parameters are stored therein. The input / output port inputs a switch for detecting the condition of the shutter and outputs a shutter energization signal. The timer circuit counts the set time and clocks the shutter control. SHT is a shutter control circuit, and the control signal SSHT from the control circuit PRS
The electromagnetic drive sources MG1 and MG2 are energized by 1, SSHT2 and the traveling direction signal SDIR, respectively. When the electromagnetic drive source MG1 is energized, the blade group 3 runs in the direction specified by the running direction signal SDIR. After a lapse of time from the start of energization to the completion of traveling of the blade group 3, the energization is stopped. The same applies to the blade group 4. When the MG2 is energized by the SSHT2 signal, the blade group 4 is driven.

シヤツタの状態は、状態信号SSW1,SSW2によりシヤツ
タ制御回路SHTから、制御回路PRSにつたえられる。接片
19,20が導通状態の時SSW1がＨを出力し、接片119,120が
導通状態の時SSW2がＨを出力する。それぞれ断線状態の
時はＬを出力する。SSW1＝H,SSW2＝Ｌの場合は往路走行
開始前（第３図）であり、逆にSSW1＝L,SSW2＝Ｈの場合
は復路走行開始前（往路走行終了後）（第８図）を表わ
す。シヤツターが全開状態（第６図）では、SSW1＝L,SS
W2＝Ｌとなる。The status of the shutter is sent from the shutter control circuit SHT to the control circuit PRS by the status signals SSW1 and SSW2. Piece
SSW1 outputs H when 19, 20 are conductive, and SSW2 outputs H when the contact pieces 119 and 120 are conductive. When each is in a disconnection state, L is output. When SSW1 = H, SSW2 = L, it is before the start of the outward trip (Fig. 3), and conversely, when SSW1 = L, SSW2 = H, it is before the start of the return trip (after the end of the outward trip) (Fig. 8). Represent. When the shutter is fully open (Fig. 6), SSW1 = L, SS
W2 = L.

次に、このように構成された実施例の動作を第11図の
フローチヤートを含めて説明する。Next, the operation of the embodiment thus constructed will be described including the flow chart of FIG.

第１図〜第３図を往路走行開始状態として、最初に、
カメラが正確に作動するのに十分なエネルギーが電池に
あるかどうかの確認、いわゆるバツテリーチエツクを行
なう。その際に羽根群３及び羽根群４をそれぞれ駆動制
御する電磁駆動源MG1,MG2のコイル26及び126に各回転軸
P,Qの周りに反時計方向、即ちこれから羽根を走行させ
露光を行なう方向と反対方向に（ロツク方向）に回転力
を与えるよう所定電流を所定時間通電する（ステツプ
１）。この場合両方のコイルに同時に通電してバツテリ
ーチエツクを行なうことにより、高速秒時での両方のコ
イルに同時に通電する状態（電源条件としては最も厳し
い）を再現し、露光秒時精度を保証し、更に両方のコイ
ルの断線チエツクとなる。但し、どちらか一方だけのコ
イルへの通電を行なってもバテツリーチエツクとするこ
とはできる。もしバツテリーチエツクでNGとなれば、カ
メラはシークエンスをストツプさせ、不作動となる。バ
ツテリーチエツクでOKとなれば、羽根群３（往路走行時
に先羽根となる）を駆動制御する電磁駆動源のコイル26
に該コイルが軸Ｐの周りに時計方向に回動するよう所定
電流を通電開始し、シヤツタは露光動作に入る（ステツ
プ２）。コイル26の回動はそのまま連結レバー10に伝え
られ該レバー10は軸Ｐの周りに時計方向に回動を開始す
る。First, with FIG. 1 to FIG. 3 as the forward traveling start state,
A so-called battery check is performed to check whether the battery has enough energy for the camera to operate correctly. At that time, the rotary shafts are attached to the coils 26 and 126 of the electromagnetic drive sources MG1 and MG2 that drive and control the blade group 3 and the blade group 4, respectively.
A predetermined current is supplied for a predetermined time so as to apply a rotational force in the counterclockwise direction around P and Q, that is, in the direction opposite to the direction in which the blades are run from now on (exposure direction) (lock direction) (step 1). In this case, by energizing both coils at the same time to perform battery check, the state where both coils are energized at the same time at high speed (the most severe power supply condition) is reproduced, and the exposure time accuracy is guaranteed. In addition, the disconnection check of both coils will occur. However, a butte tree check can be performed by energizing only one of the coils. If it fails in the battery check, the camera stops the sequence and becomes inoperable. If the battery check is OK, the coil 26 of the electromagnetic drive source that drives and controls the blade group 3 (which becomes the leading blade when traveling in the forward direction)
Then, a predetermined current is started to be applied so that the coil rotates clockwise around the axis P, and the shutter enters the exposure operation (step 2). The rotation of the coil 26 is transmitted to the connecting lever 10 as it is, and the lever 10 starts rotating around the axis P in the clockwise direction.

その時点では連結レバー10の下面のピンと駆動レバー
９の穴部9bとは、第３図の如く、時計方向の回動側に遊
びがあるので連結レバー10の回動は駆動レバー９にはま
だ伝わらず、羽根群３はスタート準備位置に留まってい
る。更に、ブレーキレバー11は、バネ15により軸Ｒの周
りに時計方向の回動習性を与えられたままストツパピン
12にレバーの側面を当接させ、突起部11cを駆動レバー
９のピン9aの走行領域内に所定量突出させ、突出部11c
及びゴムストツパ17とで形成されるエリアに駆動レバー
９のピン9aを押え込み、羽根群３のスタート準備位置の
変動を規制している。連結レバー10の回動直後、連結レ
バー10の下側立曲げ部10aは、ブレーキレバー11の腕部1
1aの先端部を矢印Ａ方向とほぼ直角方向に押し、ブレー
キレバー11を軸Ｒの周りに、バネ15による時計方向の回
動習性に抗して、反時計方向に回動する。そして、連結
レバー10の回動により、前述の下面のピンと、駆動レバ
ー９の穴部9bとの遊びがなくなり当接した時点で、ブレ
ーキレバー11はその突出部11cをピン9aの走行領域外に
退避させるまで回動している。ここで始めて、電磁駆動
源の回転力が駆動レバー９に伝えられ、駆動レバー９は
軸Ｐの周りに時計方向に回動を始め、羽根群３は開動作
を始める。この時、連結レバー10はある程度の回転角度
助走をして勢いをつけているので、羽根群３の開動作の
立上りが鋭くなり、幕速の向上に寄与する。At that time, the pin on the lower surface of the connecting lever 10 and the hole 9b of the driving lever 9 have play on the clockwise rotating side as shown in FIG. Not transmitted, the blade group 3 remains in the start preparation position. Further, the brake lever 11 is provided with a stop pin with the spring 15 having a habit of clockwise rotation about the axis R.
The side surface of the lever is brought into contact with the projection 12, and the projection 11c is projected into the traveling area of the pin 9a of the drive lever 9 by a predetermined amount.
Further, the pin 9a of the drive lever 9 is pressed into an area formed by the rubber stopper 17 to regulate the fluctuation of the start preparation position of the blade group 3. Immediately after the connecting lever 10 is rotated, the lower standing bent portion 10a of the connecting lever 10 is the arm portion 1 of the brake lever 11.
The tip portion of 1a is pushed in a direction substantially perpendicular to the arrow A direction, and the brake lever 11 is rotated around the axis R in the counterclockwise direction against the tendency of the spring 15 to rotate in the clockwise direction. Then, when the pin on the lower surface and the hole 9b of the drive lever 9 lose contact with each other due to the rotation of the connecting lever 10, when the brake lever 11 comes into contact with the hole 9b, the protruding portion 11c of the brake lever 11 moves out of the traveling area of the pin 9a. It is rotating until it is retracted. For the first time, the rotational force of the electromagnetic drive source is transmitted to the drive lever 9, the drive lever 9 starts to rotate in the clockwise direction around the axis P, and the blade group 3 starts the opening operation. At this time, since the connecting lever 10 makes a certain amount of rotational angle run-up to give momentum, the opening of the blade group 3 rises sharply, which contributes to the improvement of the curtain speed.

やがて、第４図のように、羽根群３が開動作を始めて
直後、連結レバー10はブレーキレバー11を更に反時計方
向に回動させ、下側立曲げ部10aと腕部11aとの係合を離
脱する。この時には既に、ブレーキレバー11は軸Ｒの周
りに反時計方向に回動習性が与えられるようになってい
る。それは揺動レバー14が各ブレーキレバーの腕部11e
と111eの位置により、バネ15のバネバランスが取れる位
置に、軸Ｔの周りに時計方向に回動しているからであ
る。Soon after, as shown in FIG. 4, immediately after the blade group 3 starts the opening operation, the connecting lever 10 further rotates the brake lever 11 counterclockwise to engage the lower standing bent portion 10a and the arm portion 11a. Leave. At this time, the brake lever 11 has already been given a turning tendency around the axis R in the counterclockwise direction. The rocking lever 14 is the arm part 11e of each brake lever.
This is because, by the positions 111 and 111e, the spring 15 is rotated clockwise about the axis T to a position where the spring 15 can be balanced in spring.

羽根群３用のコイル26に通電が開始されてから、適正
な露光ができるように、所定の露光秒時T₁［カメラの露
光段数に則った秒時、例えば1/2ⁿ（ｎは整数）秒］に、
そのシヤツタユニツト特有の駆動・制御系の応答特性や
駆動特性、或は羽根系の走行特性に応じて調節しなけれ
ばならない調整秒時ΔT₁を加味した時間だけ待った後
（ステップ３）、羽根群４用のコイル126に通電を開始
し、閉じ動作を行なう（ステップ４）。A predetermined exposure time T ₁ [seconds according to the number of exposure steps of the camera, for example, 1/2 ⁿ (n is an integer) so that proper exposure can be performed after the energization of the coil 26 for the blade group 3 is started. ) Seconds],
After waiting for a time that takes into account the adjustment time ΔT ₁ that must be adjusted according to the response characteristics and drive characteristics of the drive / control system peculiar to the shutter unit, or the running characteristics of the blade system (step 3), the blade group 4 The coil 126 for use is energized and the closing operation is performed (step 4).

更に時間が経過して、第５図のように羽根群３が走行
終了直前になるとブレーキレバー11は既にバネ15による
反時計方向の回動習性を持ったまま、ストツパピン13に
レバーの側面を当接させ、突起部11dを駆動レバー９の
ピン9aの走行領域内に所定量突出させ、ピン9aの走行を
待ち受ける。やがてピン9aが突起部11dに当接すると、
羽根群３の走行エネルギが相当あるので、ピン9aはブレ
ーキレバー11のバネ15による反時計方向の回動習性に抗
してブレーキレバー11を時計方向に回動して、最終停止
位置へと移行しようとする。同時に、連結レバー10の下
側立曲げ部10bが、ブレーキレバー11のバネ性を持った
腕部11bの側面に接触し、腕部11bを矢印Ａ方向に押し除
けながら、やはり最終停止位置へと移行しようとする。
従って、羽根群３はブレーキレバー11によるこれらのバ
ネ抗力と回転運動へのエネルギの変換により制動を受
け、耐久性に優れた安定走行が可能となる。更に羽根群
３が走行完了位置に到達した直後のバウンドは、バネ15
により反時計方向に回動習性を与えられたブレーキレバ
ー11の突起部11dがピン9aをゴムストツパ16とで形成さ
れるエリア側に押え込み、取り除かれる。また、羽根群
３が走行する以前（第３図）には接触（ON）状態であっ
た接片19,20は羽根群３の走行完了時点（第６図，第８
図）では非接触（OFF）状態となる。After a further time elapses, as shown in FIG. 5, when the blade group 3 is about to end traveling, the brake lever 11 already has the habit of turning counterclockwise by the spring 15 and contacts the stopper pin 13 with the side surface of the lever. The protrusions 11d are brought into contact with each other, and the protrusions 11d are protruded by a predetermined amount into the traveling area of the pin 9a of the drive lever 9 to wait for the traveling of the pin 9a. When the pin 9a comes into contact with the protrusion 11d,
Since the traveling energy of the blade group 3 is considerable, the pin 9a rotates the brake lever 11 in the clockwise direction against the tendency of the brake lever 11 to rotate in the counterclockwise direction by the spring 15, and moves to the final stop position. try to. At the same time, the lower standing bent portion 10b of the connecting lever 10 comes into contact with the side surface of the arm portion 11b having the spring property of the brake lever 11 to push the arm portion 11b in the direction of arrow A and also to the final stop position. Trying to move.
Therefore, the blade group 3 is braked by the spring resistance of the brake lever 11 and the conversion of energy into rotational movement, and stable traveling with excellent durability is possible. Furthermore, the bounce immediately after the blade group 3 reaches the traveling completed position is the spring 15
Thus, the protrusion 11d of the brake lever 11 which is given a turning tendency in the counterclockwise direction presses the pin 9a toward the area formed by the rubber stopper 16 and is removed. Further, the contact pieces 19 and 20 that were in the contact (ON) state before the blade group 3 traveled (FIG. 3) were at the time when the traveling of the blade group 3 was completed (FIGS. 6 and 8).
In the figure, it is in the non-contact (OFF) state.

羽根群４（往路走行時に後羽根となる）は、閉じ動作
をする点以外は、その駆動及びブレーキに関してまった
く羽根群３のものと同じ動作を行なう。そして、羽根群
４が走行する以前（第３図，第６図）には非接触（OF
F）状態であった接片119,120は、羽根群４の走行完了時
点（第８図）には接触（ON）状態となる。尚、前述のブ
レーキ機構は、第５図に示したスリツト露光の場合で
も、第６図に示した全開露光の場合でも、前述の如く同
様に作動することができる。The blade group 4 (which becomes the rear blade when traveling in the forward path) performs exactly the same operation as that of the blade group 3 with respect to driving and braking, except that the blade group 4 performs the closing operation. Then, before the blade group 4 travels (FIGS. 3 and 6), no contact (OF
The contact pieces 119 and 120 in the F) state are in the contact (ON) state when the traveling of the blade group 4 is completed (FIG. 8). The above-mentioned brake mechanism can operate similarly as described above in both the slit exposure shown in FIG. 5 and the full-open exposure shown in FIG.

第７図，第８図のように、往路走行が終了し羽根群４
が開口を遮閉し、露光が完了する。この状態では、往路
走行開始前と比べ、羽根群３に絡むものと羽根群４に絡
むものとがそっくり逆転している。つまり、この状態が
次の復路走行開始状態となる。そこで、カメラの制御マ
イコンは先ほどの接片19,20及び119,120のON,OFF状態
が、往路走行開始前と逆転していることを検知し、羽根
群３及び４の走行方向を往路時とは反対となるように、
各羽根群の駆動制御用コイル26,126への通電方向を反転
させる。以下復路走行は前述の往路走行とは、各部の働
きが反転して（例えば、ブレーキレバー11の突起部11d
が羽根群３のスタート準備位置の変動を規制し、突起部
11cが羽根群３の走行終了時に制動とバウンド防止の役
目をする等…）同様の動作を行なうのでポイントのみを
述べる。まず、バツテリーチエツクであるが、復路走行
で露光を行なう方向と反対方向（ロツク方向）に回転力
を与えるように各コイルに通電する（ステツプ５）。そ
して、駆動制御用コイル126に反対方向の通電を行ない
羽根群４の復路走行を行なわせる（ステツプ６）。As shown in FIG. 7 and FIG.
Closes the opening and the exposure is completed. In this state, the ones involved in the blade group 3 and the ones involved in the blade group 4 are completely reversed as compared to before the start of the outward travel. In other words, this state is the next homeward traveling start state. Therefore, the control microcomputer of the camera detects that the ON / OFF states of the contact pieces 19, 20 and 119, 120 are reversed from those before the start of the outward travel, and the traveling direction of the blade groups 3 and 4 is not the forward travel. So as to be the opposite
The energization direction to the drive control coils 26 and 126 of each blade group is reversed. The function of each part is reversed in the following backward traveling from the forward traveling described above (for example, the protrusion 11d of the brake lever 11).
Regulates the fluctuation of the start preparation position of the blade group 3,
11c plays a role of braking and bounce prevention at the end of traveling of blade group 3, etc.) Since similar operations are performed, only points will be described. First, regarding the battery check, each coil is energized so as to apply a rotational force in a direction (lock direction) opposite to the direction in which the exposure is performed in the homeward traveling (step 5). Then, the drive control coil 126 is energized in the opposite direction to cause the blade group 4 to travel in the return path (step 6).

一方、往路走行と異なるのは調整用の秒時設定で、羽
根群３と４で先羽根と後羽根の役割を交替しているの
で、各電磁駆動源のコイルへの通電順序を入れ換えなけ
ればならなく、双方の電磁駆動源の特性の微妙な差、回
転方向の違いによる同一電極駆動源自体の特性の差、羽
根群走行方向の違いによる羽根群作動負荷の差等によ
り、往路走行時の調整用秒時ΔT₁のままでは適正な露光
秒時精度が得られないため、復路走行用に別の調整用秒
時ΔT₂を設ける。これは、接片19,20及び119,120のON,O
FF状態を検知し、切り換える。On the other hand, what is different from the outward travel is the setting of the second for adjustment, and the roles of the leading blade and the trailing blade are interchanged in the blade groups 3 and 4, so the order of energizing the coils of each electromagnetic drive source must be changed. However, due to subtle differences in the characteristics of both electromagnetic drive sources, differences in the characteristics of the same electrode drive source itself due to the difference in rotation direction, differences in the blade group operating load due to differences in the blade group traveling direction, etc. Since proper exposure time accuracy cannot be obtained if the adjustment time ΔT ₁ is left as it is, another adjustment time ΔT ₂ is provided for the backward traveling. This is the ON / O of the contact pieces 19,20 and 119,120.
FF condition is detected and switched.

したがって、露光秒時T₂に調整用の秒時ΔT₂を加味さ
せた時間待って（ステツプ７）、コイル26に反対方向の
通電を行ない羽根群３の復路走行を行なわせてシヤツタ
走行を完了させる（ステツプ８）。Therefore, after waiting for a time in which the adjustment time ΔT ₂ is added to the exposure time T ₂ (step 7), the coil 26 is energized in the opposite direction to cause the blade group 3 to travel in the backward direction and the shutter travel is completed. Allow (step 8).

また、復路走行完了時には第３図の状態になってお
り、接片19,20及び119,120のON,OFF状態が復路走行開始
前と逆転（つまり、往路走行開始前と同じ）しているの
で、これをカメラの制御マイコンが検知して、再びコイ
ル26,126への通電方向を反転させ、調整用秒時をΔT₁に
切り換え、動作説明の最初に述べた往路走行開始状態と
なる。Further, when the return trip is completed, the state is as shown in FIG. 3, and the ON / OFF states of the contact pieces 19, 20 and 119, 120 are reverse to those before the start of the return trip (that is, the same as before the start of the forward trip). This is detected by the control microcomputer of the camera, the direction of energization to the coils 26, 126 is again reversed, the adjustment time is switched to ΔT ₁ , and the forward travel start state described at the beginning of the operation description is entered.

次に第10図のタイミングチヤートに基づいて電磁シヤ
ツター駆動について述べる。Next, the electromagnetic shutter drive will be described based on the timing chart of FIG.

［時刻ａ］SSHT1,SSHT2を同時に通電してバツテリーチ
エツクを行う。シヤツタの状態は、復路走行終了後なの
でシヤツタ羽根群３は閉，羽根群４は開状態である。こ
のためSSW1＝H,SSW2＝Ｌである。バツテリーチエツク
は、シヤツタ羽根が走行しない方向、すなわち羽根群３
を開→閉，羽根群４を閉→開に通電する。このような通
電方向はSDIR＝Ｈで指定される。[Time a] A battery check is performed by simultaneously energizing SSHT1 and SSHT2. Since the state of the shutter is after the traveling on the return path, the shutter blade group 3 is closed and the blade group 4 is open. Therefore, SSW1 = H and SSW2 = L. The battery check is in the direction in which the shutter blades do not run, that is, the blade group 3
Energize from open to closed and blade group 4 closed to open. Such energizing direction is designated by SDIR = H.

［時刻ｂ］バツテリーチエツクが終ると、シヤツタ走行
方向を換えるためSDIR＝Ｌにする。これで往路のシヤツ
タ走行方向が設定される。[Time b] When the battery check is completed, SDIR = L is set to change the traveling direction of the shutter. This sets the forward traveling direction of the shutter.

［時刻ｃ］シヤツタ羽根群３のマグネツトに通電を行う
とシヤツタ羽根群３は閉→開方向に走行し、先幕として
の作用を為す。[Time c] When the magnets of the shutter blade group 3 are energized, the shutter blade group 3 travels from the closed to the open direction to act as a front curtain.

［時刻ｄ］シヤツタ羽根群３が開状態になるとSSW1＝Ｌ
になる。[Time d] When the shutter blade group 3 is opened, SSW1 = L
become.

［時刻ｅ］SSHT1の通電は、時刻ｃからシヤツタ羽根が
走行するために十分な時間が経過した後、停止する。[Time e] The energization of SSHT1 is stopped after a sufficient time for traveling of the shutter blades has passed from time c.

［時刻ｆ］時刻ｃから所定の露光秒時Ｔと調整用秒時Δ
T₁を加算した時間後、SSHT2＝Ｈとなり、シヤツタ羽根
群４が走行する。シヤツタ羽根群４はSDIR＝Ｌの時、開
→閉方向に通電される（後幕走行）。[Time f] Predetermined exposure time T and adjustment time Δ from time c
After the time when T ₁ is added, SSHT2 = H, and the shutter blade group 4 runs. When SDIR = L, the shutter blade group 4 is energized in the opening → closing direction (running the rear curtain).

［時刻ｇ］シヤツタ羽根群４が開状態でなくなるとSSW2
＝Ｈになる。[Time g] SSW2 when the shutter blade group 4 is no longer open
= H.

［時刻ｈ］SSHT2の通電は、時刻ｆから一定時間経過し
た後停止する。[Time h] The energization of SSHT2 is stopped after a certain time has passed from the time f.

このようにして往路のシヤツタ走行が完了する。この
時シヤツタ羽根群３は開，羽根群４は閉状態となり、走
行方向SDIR＝Ｌで羽根群３が閉→開，羽根群４が開→閉
のままである。In this way, the forward traveling of the shutter is completed. At this time, the shutter blade group 3 is open and the blade group 4 is closed, and the blade group 3 is closed → open and the blade group 4 is open → closed in the traveling direction SDIR = L.

次に復路の走行について説明する。 Next, traveling on the return path will be described.

［時刻ｉ］バツテリーチエツクを行う。走行方向が時刻
ｈの時と同じため走行が行われない。時刻ａでのバツテ
リーチエツクと逆方向通電となる。[Time i] Perform battery check. Since the traveling direction is the same as at time h, traveling is not performed. It is energized in the reverse direction to the battery check at time a.

［時刻ｊ］バツテリーチエツク後SDIR＝Ｈにして走行方
向を逆に設定する。[Time j] After the battery check, set SDIR = H and set the traveling direction in the opposite direction.

［時刻ｋ］復路ではシヤツタ羽根群４が先幕となり最初
に走行する。[Time k] On the return trip, the shutter blade group 4 becomes the front curtain and runs first.

［時刻ｌ］シヤツタ羽根群４が開状態になるとSSW2＝Ｌ
になる。[Time l] When the shutter blade group 4 is in the open state, SSW2 = L
become.

［時刻ｍ］SSHT2は時刻ｋから一定時間後通電を停止す
る。[Time m] SSHT2 stops energization after a certain time from time k.

［時刻ｎ］時刻ｋから所定の露光秒時Ｔと往路の時と別
の調整用秒時ΔT₂を加算した時間後、シヤツタ羽根群３
の走行を開始する（SSHT1＝Ｈ）。[Time n] After a predetermined exposure time T from time k and a time ΔT ₂ for adjustment different from the forward time, the shutter blade group 3
Start running (SSHT1 = H).

［時刻ｏ］シヤツタ羽根群３が開状態でなくなるとSSW1
＝Ｈになる。[Time o] SSW1 when the shutter blade group 3 is no longer open
= H.

［時刻ｐ］時刻ｎから一定時間経過するとSSHT1＝Ｌに
して通電を終了する。[Time p] After a lapse of a certain time from time n, SSHT1 = L is set and the energization is terminated.

このようにして、復路のシヤツタ走行が完了する。 In this way, the traveling of the shelter on the return path is completed.

なお、上述した調整用秒時は、往路用，復路用で各々
独立して持つもので往路，復路で異なりはするが、ある
関連を持ってどちらか一方が決まれば一義的にもう一方
が定まるのであれば、その関係式に則ってどちらか一方
のみの調整で済ませ、両方を調整する手間を省くことも
できる。In addition, the adjustment seconds described above are independently held for the forward trip and the backward trip, and may differ for the forward trip and the return trip, but if either one is decided with a certain relation, the other is uniquely decided. If so, it is possible to adjust only one of them according to the relational expression and save the trouble of adjusting both.

又、シヤツタの走行の為の駆動源は電磁駆動に限ら
ず、例えばバネによる駆動であっても往路，復路の両方
向で露光を行うものには本発明は適用できる。The drive source for traveling the shutter is not limited to the electromagnetic drive, and the present invention can be applied to a device that performs exposure in both forward and backward directions even if it is driven by a spring, for example.

［発明の効果］以上説明したように、本発明は往路，復路共に露光を
行わせるシヤツタにおいて、往路，復路に応じた特性を
加味した補正を行って露光秒時制御を行うことで、往
路，復路共に適正な露光秒時精度が得られるシヤツタを
提供することができる。[Effects of the Invention] As described above, according to the present invention, in the shutter that performs exposure on both the forward and backward paths, the exposure time control is performed by performing the correction in consideration of the characteristics according to the forward and backward paths. It is possible to provide a shutter capable of obtaining an appropriate exposure time accuracy in both the returning path.

【図面の簡単な説明】第１図は本発明を実施した電磁駆動シヤツタの全体を表
わした斜視図、第２図は第１図と同じ状態のシヤツタの正面図、第３図は第２図の状態に於て電磁駆動源部分を取り除い
たものを表わした正面図、第４図はスリツト露光開始直後の羽根駆動レバーとブレ
ーキ機構との動きを表わした正面図、第５図はスリツト露光の後半途中の羽根駆動レバーとブ
レーキ機構との動きを表わした正面図、第６図は全開露光の羽根駆動レバーとブレーキ機構との
動きを表わした正面図、第７図は往路走行完了、或は復路走行開始前の状態を表
わしたシヤツタの正面図、第８図は第７図の状態に於て電磁駆動源部分を取り除い
たものを表わした正面図、第９図は本発明実施例の電気的な構成を示すブロツク
図、第10図は本発明実施例のタイミングチヤート、第11図は本発明実施例のフローチヤート。３及び４は羽根群、19,20及び119,120は信号接片、24及
び124はヨーク、25及び125は永久磁石、26及び126は可
動コイル、MG1及びMG2は電磁駆動源、PRSはカメラの制
御回路、SHTはシヤツタ制御回路。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing the whole of an electromagnetically driven shatter embodying the present invention, FIG. 2 is a front view of the shatter in the same state as FIG. 1, and FIG. 3 is FIG. 4 is a front view showing a state where the electromagnetic drive source portion is removed in the state of FIG. 4, FIG. 4 is a front view showing the movements of the blade drive lever and the brake mechanism immediately after the start of slit exposure, and FIG. 5 is a view of slit exposure. FIG. 6 is a front view showing the movements of the blade drive lever and the brake mechanism in the middle of the latter half, FIG. 6 is a front view showing the movements of the blade drive lever and the brake mechanism in the full-open exposure, and FIG. FIG. 8 is a front view of the shutter showing the state before the start of the return trip, FIG. 8 is a front view showing the state of FIG. 7 from which the electromagnetic drive source portion is removed, and FIG. FIG. 10 is a block diagram showing a typical structure of the present invention. Examples of the timing Chiya over preparative, Figure 11 is flow chart of the present invention embodiment. 3 and 4 are blade groups, 19, 20 and 119, 120 are signal contacts, 24 and 124 are yokes, 25 and 125 are permanent magnets, 26 and 126 are moving coils, MG1 and MG2 are electromagnetic drive sources, PRS is camera control Circuit, SHT is a shutter control circuit.

Claims

(57)【特許請求の範囲】(57) [Claims]

【請求項１】シヤツタ露光用開口を開閉する２組の遮光
部材を往復走行させ、往路，復路共に露光を行わせるシ
ヤツタにおいて、シヤツタの往路走行の際には、第１の遮光部材の走行開
始信号を発生させた後に往路走行における特性を補正し
た所定シヤツタ秒時後に第２の遮光部材の走行開始信号
を発生させ、シヤツタの復路走行の際には、第２の遮光
部材の走行開始信号を発生させた後に復路走行における
特性を補正した所定シヤツタ秒時後に第１の遮光部材の
走行開始信号を発生させるシヤツタ秒時制御回路を設け
たことを特徴とするシヤツタ。1. A shutter in which two sets of light blocking members for opening and closing a shutter exposure opening are reciprocated to perform exposure in both forward and backward paths. When the shutter travels forward, the first light blocking member starts to run. After the signal is generated, the traveling start signal of the second light shielding member is generated after a predetermined shutter time of which the characteristic in the traveling on the forward path is corrected, and the traveling start signal of the second light shielding member is generated at the time of the traveling of the shutter back. A shutter time control circuit for generating a travel start signal of the first light-shielding member after a predetermined shutter time, in which the characteristics of the traveling on the return path have been corrected after being generated, is provided.