JP2005017895A - Image frame opening/closing device - Google Patents

Image frame opening/closing device Download PDF

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Publication number
JP2005017895A
JP2005017895A JP2003185131A JP2003185131A JP2005017895A JP 2005017895 A JP2005017895 A JP 2005017895A JP 2003185131 A JP2003185131 A JP 2003185131A JP 2003185131 A JP2003185131 A JP 2003185131A JP 2005017895 A JP2005017895 A JP 2005017895A
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Japan
Prior art keywords
blade
blades
opening
image frame
substrate
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.)
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JP2003185131A
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Japanese (ja)
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JP2005017895A5 (en
JP4276004B2 (en
Inventor
Yoichi Nakano
洋一 中野
Yuji Takahashi
裕士 高橋
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Seiko Precision Inc
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Seiko Precision Inc
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Priority to JP2003185131A priority Critical patent/JP4276004B2/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an image frame opening/closing device in which projection of blades from an opening is prevented. <P>SOLUTION: A locking pawl 23 for locking a blade except the leading blade 10 with the longest moving distance, for example, a blade 9 located in the middle between the head and the tail in an expanded state is provided. Thus, overrun of the tip of the blade 9 is prevented and projection of a body part from the opening 3 is prevented by bend of the blade 9. The locking pawl 23 is integrally formed with a substrate 2 and has the shape that the body part becomes thin in order to alleviate an impact by conflict with the blade 9. In addition, the target blade 9 is constituted to be longer than other blades (especially, the blade 10) in this embodiment in order to prevent contact with the locking pawl 23 by the blade except the blade 9. Thus, this image frame opening/closing device is constituted so that the locking pawl 23 conflicts only with the blade 9 and movement of other blades is not hindered by the locking pawl 23. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、画枠開閉装置に関し、特に撮像素子のセル面を保護するシャッタやフォーカルプレーンシャッタ等として機能する画枠開閉装置に関する。
【0002】
【従来の技術】
従来の銀塩フィルム用のフォーカルプレーンシャッタ(Focal Plane Shutter:以下、FPシャッタと略す)100の構成を図1に示す。
【0003】
一般的なFPシャッタ100は、図1に示すような、複数の羽根(セクタともいう)、例えば4枚の羽根102a,102b,102c,102dが図面における上下方向にスライドし、基板101に形成された開口部(画枠又はアパーチャともいう)101aを開閉する構成(これをセクタユニットともいう)を、基板101の表裏面に有している。但し、図1及び以下の説明では、説明の簡略化のため、基板101における一方の面(これを表面とする)に着目する。
【0004】
図1に示すセクタユニットは、平行に設けられた羽根102a,102b,102c,102dが、羽根止めピン103a,103d,104b,104c,104d,105a,105b,105cにより、軸部106a,106b,106cをそれぞれ中心として回動するアーム103,104,105と連結された(カシメられた)構成を有する。アーム105を軸部106cを中心として摺動させることで、羽根102a,102b,102c,102dは平行移動する。
【0005】
ここで、各アームの軸部(106a,106b,106c)と各羽根(102a,102b,102c,102d)がカシメされている箇所(103a及び105a,104b及び105b,104c及び105c,103d及び104d)との距離は、図中矢印の長さのように、羽根102aが最も長く、羽根102dが最も短いため、アーム105の回転による各羽根(102a,102b,102c,102d)の移動距離は、羽根102aが最も長く、羽根102dが最も短くなる。従って、開口部101aを遮蔽するように羽根102a,102b,102c,102dが展開した状態(これを展開状態という)からアーム105を反時計回りに回動させた場合、各羽根(102a,102b,102c,102d)は互いに重なりを大きくしつつ、開口部101a上と重畳する領域を開放するように平行移動する。この動作を開放動作といい、開口部101aを開放するように羽根102a,102b,102c,102dが重畳した状態を重畳状態という。また、重畳状態からアーム105を時計回りに回動させた場合、各羽根(102a,102b,102c,102d)は互いにずれを大きくしつつ、開口部101a上と重畳する領域を遮蔽するように平行移動する。この動作を遮蔽動作といい、開口部101aを遮蔽するように羽根102a,102b,102c,102dが展開した状態を展開状態という。このように、セクタユニットは各羽根が平行状態を維持しつつ往復運動が可能なように構成された、いわゆる平行リンク機構を成している。
【0006】
以上のような構成において、基板101の表裏面に形成されたセクタユニットのうち一方を展開状態から重畳状態へ移行させ(これを先幕という)、これと所定の時間間隔をずらして他の一方を重畳状態から展開状態へ移行させる(これを後幕という)ことで、受光部(銀塩フィルム)を所望する時間だけ露光するためのスリットを形成することができる。即ち、シャッタを切る動作が実現される。
【0007】
尚、上記のような構成のセクタユニットは、通常、基板101と平行に設けられ、該基板101の開口部101aと重畳する領域に開口部110aを有する羽根受け板110が形成する空間(以下、セクタ室という)内に収納される。但し、羽根受け板110は、スペーサ111a,111b,111c,111d,111eによりセクタ室を形成しつつ基板101に固定される。
【0008】
一方、最近のデジタルスチルカメラにおいては、電子シャッタを内蔵したCCD(Charge−Coupled Device)等の撮像素子を採用したものが普及してきた。これは撮像素子自身が露出時間(=電荷蓄積時間)を制御する機能を持ったものである。
【0009】
このようなデジタルスチルカメラでは、撮像素子自身がシャッタ機能を有しているため、上述したFPシャッタ100のような、受光面を露出するための機構を必要としない。但し、撮像素子におけるセル面の保護(焼け、ごみ対策)や電荷吐き出し時のスミア防止等を目的として、何らかの保護手段を撮像素子の受光面、即ち従来のFPシャッタと同じ位置に配置することが好ましい。そこで従来では、図1に示すようなセクタユニットが基板(図1では基板101)の片面にのみ形成されたシャッタ(画枠開閉装置ともいう)を保護手段として、セル面の直前に配置していた。
【0010】
ところで、上述したような構成のセクタユニットは、羽根102a,102b,102c,102dを展開状態から重畳状態へ移行させた場合、停止時に羽根102a,102b,102c,102dが慣性により進行方向へオーバランし、進行方向と垂直方向の成分を持ったたわみが発生してしまう。同様に、羽根102a,102b,102c,102dを開放状態から遮蔽状態へ移行させた場合も停止時に羽根102a,102b,102c,102dが進行方向にオーバランしてたわみが発生してしまう。このたわみは移動距離が最も長い羽根102aに顕著に見られ、変形による老化や他の部材への接触等により、羽根や他の部材が破損してしまうという問題が発生する。
【0011】
このような問題を解決する手段としては、羽根の停止位置にたわみを抑えるための度当り部を少なくとも1つ以上設けることが考えられるが、展開状態から重畳状態へ移行した際の停止位置、又は、重畳状態から展開状態へ移行した際の停止位置の何れか一方のみに度当り部を設けた場合、停止時における度当り部との衝突の衝撃により、羽根と羽根止めピンとの磨耗に偏りが発生し、羽根を安定して保持できなくなるという問題が発生する。この問題は、磨耗が生じた部分とそれ以外の部分との露光量に偏りを持たせるため、結果として撮像画像にムラを発生させる要因となる。
【0012】
そこで従来では、図2に示すFPシャッタ200のように、展開状態から重畳状態へ移行した際の停止位置、及び、重畳状態から展開状態へ移行した際の停止位置の両方にそれぞれ少なくとも1つの度当り部(図2では210a,210b,210c,210d)を設け、羽根と羽根止めピンとの磨耗に偏りが生じないように工夫している(例えば以下の特許文献1参照)。
【0013】
【特許文献1】
特開2002−244178号公報
【0014】
【発明が解決しようとする課題】
しかしながら、特に重畳状態から展開状態へ移行する際に生じる生じる羽根のたわみは、最も移動距離が多い羽根に限らず、それ以外の羽根にも発生する問題である。とりわけ、展開時に羽根受け板に設けた開口部から露出する羽根、換言すればアームの中間付近にカシメられた羽根(例えば図2では羽根102bや102cに相当)に関しては、羽根受け板と重畳する左右端でしか、進行方向と垂直方向の成分を持つたわみ方向への規制を受けないため、生じたたわみにより羽根の一部が開口部から突出し、他の部材に接触してしまうという問題を発生させる。
【0015】
この問題は、デジタルスチルカメラやデジタル一眼レフカメラ等のような、撮像素子のセル面に光学フィルタ等の部材を設ける必要のある場合に顕著となる。例えばデジタルスチルカメラでは、セル面上に設けられた光学フィルタの直前又は直後にFPシャッタ又は保護手段を設ける必要があるため、はみ出した羽根が光学フィルタと接触し、これらが破損してしまう。また、デジタル一眼レフカメラはレンズを交換できることが前提であり、反射ミラーの配置等も従来の一眼レフカメラと同様であることから、光学フィルタを配置する場所がFPシャッタ(又は保護手段)の直前又は直後に限定されており、同様の問題を発生する。更に、デジタル一眼レフカメラは、レンズシャッタを搭載したデジタルスチルカメラよりも撮像素子が大きく、それに伴って開口部の径も大きくなるため、たわみによる羽根のはみ出しが大きくなる。
【0016】
このような問題を解決する方法としては、例えばたわみにくい羽根を使用するという方法が考えられるが、これは即ち厚い羽根や重い羽根を使用するということであるため、セクタ室が大型化したり、セクタユニットが重くなってしまい、シャッタが低速化してしまうという問題を発生させる。
【0017】
本発明は、上記のような問題に鑑みてなされたもので、開口部から羽根が突出することが防止された画枠開閉装置を提供することを目的とする。
【0018】
【課題を解決するための手段】
かかる目的を達成するために、本発明は、請求項1記載のように、複数の羽根を重畳状態から展開状態へ移行するセクタユニットと、前記展開状態時に前記複数の羽根により閉鎖される開口部を有する基板とを含んで構成された画枠開閉装置において、前記展開状態時に前記複数の羽根における進行方向に対して先頭以外の羽根に当接するストッパ部材を有して構成される。展開状態へ移行する際の進行方向に対して先頭以外の羽根、特に中間に位置する羽根は、展開状態で開口部に胴体部分が露出されているため、この羽根のオーバランを防止するようにストッパ部材を設けることで、これがたわむことを抑制できる。従って、この羽根が基板に形成された開口部から突出することを防止でき、羽根や他の部材が破損することを回避できる。
【0019】
また、本発明は、請求項2記載のように、複数の羽根を重畳状態から展開状態へ移行するセクタユニットと、前記展開状態時に前記複数の羽根により閉鎖される第1の開口部を有する基板と、該基板と所定の間隔を隔てて固定されることで前記セクタユニットを収納するセクタ室を形成する羽根受け板とを含んで構成された画枠開閉装置において、前記羽根受け板は前記第1の開口部と重畳する領域に第2の開口部を有し、前記基板および前記羽根受け板の少なくとも一方には、前記展開状態時に前記複数の羽根における進行方向に対して先頭以外の羽根に当接するストッパ部材を有して構成される。展開状態へ移行する際の進行方向に対して先頭以外の羽根、特に中間に位置する羽根は、展開状態で開口部に胴体部分が露出されているため、この羽根のオーバランを防止するようにストッパ部材を設けることで、これがたわむことを抑制できる。従って、この羽根が羽根受け板に形成された第2の開口部から突出することを防止でき、羽根や他の部材が破損することを回避できる。
【0020】
また、請求項1又は2記載の前記ストッパ部材は、例えば請求項3記載のように、胴体部分が前記羽根との当接部分よりも細く形成され弾性変形可能な構成でも良い。胴体部分が細く形成されたストッパ部材を適用することで、弾性部材として機能するストッパ部材で羽根を係止することが可能となるため、衝突時の衝撃を軽減することができ、羽根のたわみをより低減できるだけでなく、羽根自体の破損を防止できる。
【0021】
また、請求項3記載の前記ストッパ部材は、例えば請求項4記載のように、前記基板に一体形成されていてもよい。ストッパ部材を基板と一体形成することで、部品点数の増加を防止でき、製造コストの削減及び製造工程の簡略化を図ることができる。
【0022】
また、請求項1又は2記載の前記ストッパ部材は、例えば請求項5記載のように、前記羽根との当接部分が弾性部材で形成されていてもよい。ストッパ部材を弾性部材で作製することで、衝突時の衝撃を軽減することができ、羽根のたわみをより低減できるだけでなく、羽根自体の破損を防止できる。
【0023】
また、請求項1から5の何れか1項に記載の前記ストッパ部材は、請求項7記載のように、前記羽根を移動させるためのアームと該羽根とがカシメられた部分の反対側の端で該羽根と衝突するように設けられていることが好ましい。停止する際にオーバランする部分はアームによりカシメられている側の反対側に顕著に見られる。従って、カシメられた側の反対側の端と衝突するようにストッパ部材を設けることで、より効率的に羽根のオーバランを防止できる。
【0024】
【発明の実施の形態】
以下、本発明を好適に実施した形態について図面を用いて詳細に説明する。
【0025】
〔第1の実施形態〕
先ず、本発明の第1の実施形態について図面と共に以下に説明する。図3は本発明の第1の実施形態による画枠開閉装置1の構成(画枠遮蔽時)を示す上面図である。尚、以下の説明では、デジタル一眼レフカメラ等における撮像素子のセル面を保護する目的(保護手段)として使用される画枠開閉装置を例に挙げて説明する。但し、本発明をFP(Focal Plane)シャッタのようなシャッタに適用することも可能である。
【0026】
図3に示すように、画枠開閉装置1は、複数の羽根(セクタ)、例えば3枚の羽根8,9,10が図面における上下方向にスライドし、基板(地板)2に形成された開口部(画枠又はアパーチャ)3を開閉する構成(セクタユニット)を、基板2の何れか一方の面に有する。
【0027】
図3に示すセクタユニットは、基板2上に設けられた3つのアーム4,5,6と1つの補助アーム7とを含む。アーム4は、基板2に固定(又は一体形成)された軸部11を支点として摺動可能に設けられており、羽根止めピン12により羽根8と、また羽根止めピン13により羽根9と、更に羽根止めピン14により羽根10と回転可能にカシメられて連結されている。更にまた、アーム4には、例えば小判形の穴(若しくは溝)が設けられている。この穴(若しくは溝)には、外部のモータ等の駆動機構と連結された駆動レバー21に設けられた同じく小判形の駆動ピン21aが嵌合される。駆動レバー21は、外部の駆動機構によりギア等を介して反時計回りに回転駆動され、これによりアーム4を反時計回りに回転させる。但し、駆動ピン21aが基板2に開けられた軸部11を中心とする円弧状の溝穴22に係合されているため、駆動バネ21はこの円弧に沿った範囲にのみ回転可能となっている。
【0028】
また、アーム5は、基板2に固定(又は一体形成)された軸部15を支点として摺動可能に設けられており、ピン16により補助アーム7と、また羽根止めピン18により羽根10と回転可能に連結されている。尚、補助アーム7は、羽根止めピン13及び17により羽根9に連結され、また羽根止めピン13によりアーム4と回転可能に連結されている。従って、アーム4が軸部11を中心として反時計回りに回動すると、羽根10及び補助アーム7を介して動力が伝わり、アーム5が軸部15を中心として反時計回りに回動する。この際、軸部11及び15の間隔と羽根止めピン14及び18の間隔とが同じで且つ固定であるため、羽根10は開口部3上を平行移動する。同様に、軸部11及び15の間隔と羽根止めピン13及びピン16の間隔とが同じで且つ固定であるため、羽根9は開口部3上を平行移動する。尚、アーム4を時計回りに回動させた場合は、この逆となる。
【0029】
更に、アーム6は、基板2に固定(又は一体形成)された軸部19を支点として摺動可能に設けられており、羽根止めピン20により羽根8と回転可能に連結されている。従って、アーム4が軸部11を中心として反時計回りに回動すると、羽根8を介してアーム6に動力が伝わり、アーム6が軸部19を中心として反時計回りに回動する。この際、軸部11及び19の間隔と羽根止めピン12及び20との間隔とが同じで且つ固定であるため、羽根8は開口部3上を平行移動する。尚、アーム4を時計回りに回動させた場合は、この逆となる。
【0030】
ここで、各軸部(11,15,19)と各羽根(8,9,10)が連結されている箇所(14及び18,13及び17(但し実質的に16),12及び20)との距離は、羽根10が最も長く、羽根8が最も短いため、アーム4の回転による各羽根(8,9,10)の移動距離は、羽根10が最も長く、羽根8が最も短くなる。従って、開口部3を閉鎖したセクタユニットの展開状態からアーム4を反時計回りに回動させた場合、各羽根(8,9,10)は互いに重なりを大きくしつつ、開口部3を開放するように平行移動する。この動作を開放動作といい、開口部3が開放されたセクタユニットの重畳状態を開放状態という。図4に、セクタユニットの重畳状態時の構成を示す。また、この開放状態からアーム4を時計回りに回動させた場合、各羽根(8,9,10)は互いにずれを大きくしつつ、開口部3上を閉鎖するように平行移動する。この動作を閉鎖動作という。上述のように、閉鎖状態では各羽根(8,9,10)が展開した状態にあり、開放状態では各羽根(8,9,10)が重畳した状態にある。尚、図3は、セクタユニットの展開状態時の構成を示している。このように、本実施形態による画枠開閉装置1は、各羽根が平行状態を維持しつつ往復運動することで、展開状態と重畳状態とを遷移する平行リンク機構の構成を有するセクタユニットを有して構成されている。
【0031】
上記したような構成を有するセクタユニットは、基板2と、少なくとも開口部3と重畳する領域に開口部27を有する羽根受け板26と、これを基板2に固定するためのスペーサ28,29,30,31とで形成される空間(セクタ室)の中に収納されている。
【0032】
以上のような構成において、セクタユニットを重畳状態から展開状態へ移行させた際、各羽根8,9,10は、図5(a)に示すように、アーム4,5,6にカシメられた側と反対側(これを先端という)が慣性によりオーバランし、たわんだ状態となる。このたわみは、先後端(図面中では左右端)及び上/下端が羽根受け板26で押さえ付けられている羽根(羽根8,10に相当)に関して抑制されているが、胴体部の上下端が開口部3(又は27)から露出している羽根(羽根9に相当)に関しては、先後端のみしか押さえ付けられていないため、図5(b)に示すように、羽根9が開口部3から光軸方向へ突出してしまう。尚、図5(b)は、図5(a)のX1−X1断面図である。
【0033】
このような問題を解決するために、本実施形態では、図3に示すように、セクタユニットが展開状態のときに、最も移動距離が長い羽根10(これを先頭の羽根という)以外の羽根、例えば先頭と後尾との羽根の中間に位置する羽根9を係止するための係止爪23を設ける。この係止爪23は、羽根9のオーバランを防止するストッパ部材として機能するものである。従って、セクタユニットが展開状態へ移行した際に係止爪23と羽根9とが衝突することで、羽根9の先端がオーバランすることを防止でき、羽根9がたわまず、この結果として開口部3から羽根が突出しない。
【0034】
ここで、係止爪23の拡大図を図6に示す。図6に示すように、本実施形態による係止爪23は基板2と一体形成されており、羽根9との衝突による衝撃を軽減するために胴体部分が羽根9との係止部分よりも細くなった形状を有している。また、係止爪23に羽根9以外が接触することを防止するために、本実施形態では目的の羽根9を他の羽根(特に羽根10)よりも長く構成する。これにより、係止爪23が羽根9にのみ衝突するように構成することができ、他の羽根が係止爪23により移動を妨害されることがない。係止爪23を基板2と一体形成することで、画枠開閉装置1の部品点数が増加することを防止できるため、製造コストの増加及び製造工程の煩雑化を防止できる。
【0035】
更に、本実施形態による係止爪23は、羽根9の先端で衝突するように設けられている。即ち、停止する際にオーバランする部分は、羽根9の先端側に顕著に見られる。そこで、本実施形態では、このオーバランが顕著となる先端近傍を係止爪23で係止するように構成することで、効率的に羽根9がオーバランすることを防止する。
【0036】
また、本実施形態による基板2は、例えばカーボングラファイト入りのポリカーボネイト等のプラスチック材料等で形成することが可能であるが、この他にも一般的に基板として使用される樹脂等であれば如何なるものも適用することが可能である。
【0037】
以上のように、本実施形態によれば、展開時に進行方向において先頭以外に位置する羽根のオーバランが基板と一体形成された係止爪により抑制できるため、この羽根が開口部から突出して他の部材(光学フィルタ等)と接触することを防止でき、羽根又は他の部材が破損することを防止できる。また、本実施形態では、羽根を硬くする必要もないため、装置の大型化や羽根の低速化を防止できる。尚、展開状態から重畳状態へ移行した際の羽根8,9,10のオーバランを防止するための構成として、図3又は図4に示すように、停止位置に度当り部24,25が設けられている。
【0038】
また、羽根8,9,10の重なり方が上述したもの(羽根10が最も上で羽根8が最も下である場合)と逆である場合(図7(a)の羽根8’,9’,10’参照))、重畳状態から展開状態に移行した際に羽根9’の胴体部が、図7(b)に示すように、開口部27から突出するが、このような場合も、上記した構成と同様の構成(係止爪23)で羽根9’の胴体部が開口部27から突出することを防止できる。尚、図7(b)は、図7(a)のX2−X2断面図である。
【0039】
〔第2の実施形態〕
次に、本発明の第2の実施形態について図面を用いて詳細に説明する。第1の実施形態では、進行方向に対して先頭に位置する羽根以外の羽根のストッパ部材として、基板2と一体形成された係止爪23を用いた場合を例に挙げていた。但し、本発明はこれに限定されず、この羽根のオーバランを抑制するためのストッパ部材を基板2とは別部材で形成することも可能である。
【0040】
そこで、本実施形態では、図8に示すように、展開時に先頭以外の羽根と衝突する度当り部43を基板2とは別の部材で形成し、これを第1の実施形態における係止爪23と同様の位置に取り付けた。ここで、度当り部43は、例えば天然ゴムやスチレンゴムやブチルゴムや二トリルゴムやクロロプレンゴムやネオプレンゴムやエチレン・プロピレンゴムやハイパロンやアクリルゴムやウレタンゴムやシリコンゴムやフッ素ゴムやその他、衝撃を吸収できる弾性部材で形成される。
【0041】
このように、弾性部材で形成された度当り部43を、展開時に先頭以外の羽根と衝突する位置に設けることで、羽根がオーバランすることを抑制することが可能となり、この羽根が開口部から突出して他の部材(光学フィルタ等)と接触することが回避でき、羽根又は他の部材が破損することを防止できる。尚、他の構成は、第1の実施形態と同様であるため、ここでは説明を省略する。
【0042】
〔他の実施形態〕
以上、説明した実施形態は本発明の好適な一実施形態にすぎず、本発明はその趣旨を逸脱しない限り種々変形して実施可能である。例えば上記した第1及び第2の実施形態では、画枠開閉装置1を撮像素子の保護手段として構成した場合について図面を用いて説明したが、本発明は上述にもあるように、これに限定されず、本実施形態による画枠開閉装置1を基板2の表裏面に構成してFPシャッタ等を作製することも容易に可能である。これにより、シャッタを切った際に撮像素子のセル面やその他の部材に、たわんだ羽根が接触することを防止できる。更に、これを実現するために、羽根を重く又は硬くする必要もないため、装置の大型化や羽根の低速化を防止できる。
【0043】
【発明の効果】
以上説明したように、本発明によれば、開口部から羽根が突出することを防止できる。
【図面の簡単な説明】
【図1】従来の技術によるFPシャッタ100の構成を示す上面図である。
【図2】従来の技術による度当り部が設けられたFPシャッタ200の構成を示す上面図である。
【図3】本発明の第1の実施形態による画枠開閉装置1の構成(画枠遮蔽時)を示す上面図である。
【図4】本発明の第1の実施形態による画枠開閉装置1の構成(画枠開放時)を示す上面図である。
【図5】係止爪23を形成していない場合に生じる展開時の羽根9のオーバランを示す図であり、(a)はオーバランした際の画枠形成装置1の上面図であり、(b)はそのX1−X1断面図である。
【図6】本発明の第1の実施形態による係止爪23を拡大した図である。
【図7】図3又は図4に示す画枠開閉装置1における各羽根8,9,10の重なりを逆とした場合の構成を示す図であり、(a)はオーバランした際の画枠形成装置1の上面図であり、(b)はそのX2−X2断面図である。
【図8】本発明の第2の実施形態による度当り部43を拡大した図である。
【符号の説明】
1 画枠開閉装置
2 基板
3、27 開口部
4、5、6 アーム
7 補助アーム
8、8’、9、9’、10、10’ 羽根
11、15、19 軸部
12、13、14、17、18、20 羽根止めピン
16 ピン
21 駆動レバー
21a 駆動ピン
22 溝穴
23 係止爪
24、25、43 度当り部
26 羽根受け板
28、29、30、31 スペーサ
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an image frame opening / closing device, and more particularly to an image frame opening / closing device functioning as a shutter, a focal plane shutter, or the like that protects a cell surface of an image sensor.
[0002]
[Prior art]
A configuration of a conventional focal plane shutter (focal plane shutter: hereinafter abbreviated as FP shutter) 100 for a silver salt film is shown in FIG.
[0003]
A general FP shutter 100 is formed on a substrate 101 by a plurality of blades (also referred to as sectors), for example, four blades 102a, 102b, 102c, and 102d, as shown in FIG. The substrate 101 has a configuration for opening and closing an opening (also referred to as an image frame or an aperture) 101 a (also referred to as a sector unit) on the front and back surfaces of the substrate 101. However, in FIG. 1 and the following description, attention is paid to one surface (this surface is referred to as a surface) of the substrate 101 for simplification of the description.
[0004]
In the sector unit shown in FIG. 1, the blades 102a, 102b, 102c, and 102d provided in parallel are shaft portions 106a, 106b, and 106c by blade stopper pins 103a, 103d, 104b, 104c, 104d, 105a, 105b, and 105c. Are connected (crimped) to the arms 103, 104, and 105 that rotate about the center of each. By sliding the arm 105 around the shaft portion 106c, the blades 102a, 102b, 102c, and 102d move in parallel.
[0005]
Here, the portions (103a and 105a, 104b and 105b, 104c and 105c, 103d and 104d) where the shafts (106a, 106b, 106c) of the arms and the blades (102a, 102b, 102c, 102d) are crimped Is the longest blade 102a and the shortest blade 102d, as indicated by the length of the arrow in the figure, and the movement distance of each blade (102a, 102b, 102c, 102d) by the rotation of the arm 105 is 102a is the longest and the blade 102d is the shortest. Therefore, when the arm 105 is rotated counterclockwise from a state where the blades 102a, 102b, 102c, 102d are deployed so as to shield the opening 101a (this is called a deployed state), each blade (102a, 102b, 102c and 102d) move in parallel so as to open a region overlapping with the opening 101a while increasing the overlap. This operation is referred to as an opening operation, and a state in which the blades 102a, 102b, 102c, and 102d are overlapped so as to open the opening 101a is referred to as a superimposed state. Further, when the arm 105 is rotated clockwise from the overlapped state, the blades (102a, 102b, 102c, 102d) are parallel to each other so as to shield the overlapping region on the opening 101a while increasing the displacement. Moving. This operation is called a shielding operation, and a state where the blades 102a, 102b, 102c, and 102d are deployed so as to shield the opening 101a is called a deployed state. As described above, the sector unit forms a so-called parallel link mechanism configured such that each blade can reciprocate while maintaining a parallel state.
[0006]
In the configuration as described above, one of the sector units formed on the front and back surfaces of the substrate 101 is shifted from the unfolded state to the superimposed state (this is called the front curtain), and the other one is shifted by a predetermined time interval. Is shifted from the superimposed state to the unfolded state (this is called the rear curtain), whereby a slit for exposing the light receiving portion (silver salt film) for a desired time can be formed. That is, the operation of releasing the shutter is realized.
[0007]
The sector unit configured as described above is normally provided in parallel with the substrate 101, and is a space formed by a blade receiving plate 110 having an opening 110a in a region overlapping with the opening 101a of the substrate 101 (hereinafter, referred to as “a”). Stored in a sector room). However, the blade receiving plate 110 is fixed to the substrate 101 while forming a sector chamber by the spacers 111a, 111b, 111c, 111d, and 111e.
[0008]
On the other hand, in recent digital still cameras, those employing an image sensor such as a CCD (Charge-Coupled Device) incorporating an electronic shutter have become widespread. This has a function of controlling the exposure time (= charge accumulation time) by the image pickup device itself.
[0009]
In such a digital still camera, since the image pickup device itself has a shutter function, a mechanism for exposing the light receiving surface, such as the FP shutter 100 described above, is not required. However, for the purpose of protecting the cell surface (burning and dust countermeasures) in the image sensor and preventing smearing when discharging the charge, some protection means may be arranged at the same position as the light receiving surface of the image sensor, that is, the conventional FP shutter. preferable. Therefore, conventionally, a sector unit as shown in FIG. 1 is disposed immediately before the cell surface as a protection means, which is a shutter (also referred to as an image frame opening / closing device) formed only on one side of the substrate (substrate 101 in FIG. 1). It was.
[0010]
By the way, in the sector unit configured as described above, when the blades 102a, 102b, 102c, and 102d are moved from the deployed state to the superimposed state, the blades 102a, 102b, 102c, and 102d overrun in the traveling direction due to inertia when stopped. In other words, a deflection having a component in the direction perpendicular to the traveling direction occurs. Similarly, when the blades 102a, 102b, 102c, and 102d are shifted from the open state to the shielded state, the blades 102a, 102b, 102c, and 102d are overrun in the traveling direction at the time of stoppage, and deflection occurs. This deflection is noticeable in the blade 102a having the longest moving distance, and there arises a problem that the blade and other members are damaged due to aging due to deformation, contact with other members, and the like.
[0011]
As a means for solving such a problem, it is conceivable to provide at least one contact portion for suppressing deflection at the stop position of the blade, but the stop position at the time of transition from the deployed state to the superimposed state, or If the contact portion is provided only at one of the stop positions when the state is shifted from the superimposed state to the deployed state, the wear of the blade and the blade stopper pin is biased due to the impact of the collision with the contact portion at the time of stop. And the problem that the blade cannot be stably held occurs. This problem causes unevenness in the exposure amount between the part where the wear has occurred and the other part, resulting in unevenness in the captured image.
[0012]
Therefore, in the related art, as in the FP shutter 200 shown in FIG. 2, at least one degree each at the stop position when the state is shifted from the deployed state to the superimposed state and at the stop position when the state is shifted from the superimposed state to the deployed state. Contact portions (210a, 210b, 210c, and 210d in FIG. 2) are provided, and are devised so that the wear between the blades and the blade stopper pins is not biased (see, for example, Patent Document 1 below).
[0013]
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-244178
[Problems to be solved by the invention]
However, the deflection of the blades that occurs particularly when shifting from the superimposed state to the deployed state is a problem that occurs not only in blades with the longest moving distance but also in other blades. In particular, the blade exposed from the opening provided in the blade receiving plate during deployment, in other words, the blade caulked near the middle of the arm (for example, corresponding to the blades 102b and 102c in FIG. 2) overlaps with the blade receiving plate. Since it is not restricted to the deflection direction having a component perpendicular to the traveling direction only at the left and right ends, a problem arises in that part of the blade protrudes from the opening due to the resulting deflection and comes into contact with other members. Let
[0015]
This problem becomes prominent when it is necessary to provide a member such as an optical filter on the cell surface of the image sensor, such as a digital still camera or a digital single-lens reflex camera. For example, in a digital still camera, since it is necessary to provide an FP shutter or protection means immediately before or after the optical filter provided on the cell surface, the protruding blade comes into contact with the optical filter, and these are damaged. In addition, it is assumed that the digital single-lens reflex camera can change the lens, and the arrangement of the reflection mirror is the same as that of the conventional single-lens reflex camera, so the place where the optical filter is arranged is immediately before the FP shutter (or protection means). Or it is limited to immediately after, and the same problem occurs. Furthermore, a digital single-lens reflex camera has a larger image pickup device than a digital still camera equipped with a lens shutter, and accordingly, the diameter of the opening is also increased.
[0016]
As a method for solving such a problem, for example, a method of using a blade that is difficult to bend can be considered. However, this means that a thick blade or a heavy blade is used. The unit becomes heavier and the shutter speed is reduced.
[0017]
The present invention has been made in view of the above problems, and an object of the present invention is to provide an image frame opening / closing device in which a blade is prevented from protruding from an opening.
[0018]
[Means for Solving the Problems]
In order to achieve this object, the present invention provides a sector unit that shifts a plurality of blades from a superimposed state to a deployed state, and an opening that is closed by the plurality of blades in the deployed state. The image frame opening and closing device configured to include a substrate having a stopper member that contacts a blade other than the head with respect to the traveling direction of the plurality of blades in the unfolded state. The blades other than the head, particularly the blades located in the middle with respect to the direction of travel when shifting to the unfolded state, are exposed to the body part at the opening in the unfolded state. By providing a member, it can suppress that this bends. Therefore, this blade can be prevented from protruding from the opening formed in the substrate, and the blade and other members can be prevented from being damaged.
[0019]
According to a second aspect of the present invention, there is provided a substrate comprising: a sector unit that shifts a plurality of blades from a superimposed state to a deployed state; and a first opening that is closed by the plurality of blades in the deployed state. And an image frame opening and closing device configured to form a sector chamber for housing the sector unit by being fixed at a predetermined interval from the substrate, wherein the blade receiving plate is A second opening in a region overlapping with the one opening, and at least one of the substrate and the blade receiving plate has a blade other than the head in the advancing direction of the plurality of blades in the unfolded state. It has a stopper member that abuts. The blades other than the head, particularly the blades located in the middle with respect to the direction of travel when shifting to the unfolded state, are exposed to the body part at the opening in the unfolded state. By providing a member, it can suppress that this bends. Therefore, this blade can be prevented from protruding from the second opening formed in the blade receiving plate, and the blade and other members can be prevented from being damaged.
[0020]
The stopper member according to claim 1 or 2 may have a configuration in which a body portion is formed thinner than a contact portion with the blade and is elastically deformable, for example, as in claim 3. By applying a stopper member with a narrow body part, it becomes possible to lock the blade with a stopper member that functions as an elastic member, so that the impact at the time of collision can be reduced and the deflection of the blade can be reduced. Not only can it be further reduced, but also the breakage of the blade itself can be prevented.
[0021]
Further, the stopper member according to claim 3 may be integrally formed on the substrate, for example, according to claim 4. By integrally forming the stopper member with the substrate, it is possible to prevent an increase in the number of parts, and to reduce the manufacturing cost and simplify the manufacturing process.
[0022]
Moreover, as for the said stopper member of Claim 1 or 2, the contact part with the said blade | wing may be formed with the elastic member like Claim 5, for example. By producing the stopper member with an elastic member, the impact at the time of collision can be reduced, and not only can the deflection of the blade be reduced, but also the blade itself can be prevented from being damaged.
[0023]
The stopper member according to any one of claims 1 to 5, as in claim 7, is an end opposite to a portion where the arm for moving the blade and the blade is crimped. It is preferable that it is provided so as to collide with the blade. The portion that overruns when stopping is noticeable on the side opposite the side that is crimped by the arm. Therefore, by providing the stopper member so as to collide with the end opposite to the crimped side, the overrun of the blade can be prevented more efficiently.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the drawings.
[0025]
[First Embodiment]
First, a first embodiment of the present invention will be described below with reference to the drawings. FIG. 3 is a top view showing the configuration (when the image frame is shielded) of the image frame opening / closing apparatus 1 according to the first embodiment of the present invention. In the following description, an image frame opening / closing device used as an object (protection means) for protecting the cell surface of an image sensor in a digital single-lens reflex camera or the like will be described as an example. However, the present invention can also be applied to a shutter such as an FP (Focal Plane) shutter.
[0026]
As shown in FIG. 3, the image frame opening / closing apparatus 1 includes a plurality of blades (sectors), for example, three blades 8, 9, 10 that slide in the vertical direction in the drawing to form openings formed in a substrate (base plate) 2. A configuration (sector unit) for opening and closing the portion (image frame or aperture) 3 is provided on one surface of the substrate 2.
[0027]
The sector unit shown in FIG. 3 includes three arms 4, 5, 6 and one auxiliary arm 7 provided on the substrate 2. The arm 4 is slidably provided with a shaft portion 11 fixed (or integrally formed) on the substrate 2 as a fulcrum, and is provided with a blade 8 by a blade stopper pin 12, a blade 9 by a blade stopper pin 13, and The blade 10 is rotatably crimped to the blade 10 by the blade stopper pin 14. Furthermore, the arm 4 is provided with, for example, an oval hole (or groove). The hole (or groove) is fitted with an oblong drive pin 21a provided on a drive lever 21 connected to a drive mechanism such as an external motor. The drive lever 21 is driven to rotate counterclockwise by an external drive mechanism via a gear or the like, thereby rotating the arm 4 counterclockwise. However, since the drive pin 21a is engaged with the arcuate slot 22 centered on the shaft portion 11 formed in the substrate 2, the drive spring 21 can rotate only in a range along the arc. Yes.
[0028]
The arm 5 is slidably provided with a shaft portion 15 fixed (or integrally formed) with the substrate 2 as a fulcrum, and rotates with the auxiliary arm 7 by the pin 16 and the blade 10 by the blade stopper pin 18. Connected as possible. The auxiliary arm 7 is connected to the blade 9 by blade stopper pins 13 and 17 and is rotatably connected to the arm 4 by the blade stopper pin 13. Therefore, when the arm 4 rotates counterclockwise about the shaft portion 11, power is transmitted through the blade 10 and the auxiliary arm 7, and the arm 5 rotates counterclockwise about the shaft portion 15. At this time, since the interval between the shaft portions 11 and 15 and the interval between the blade stopper pins 14 and 18 are the same and fixed, the blade 10 moves in parallel on the opening 3. Similarly, since the space | interval of the axial parts 11 and 15 and the space | interval of the blade stop pin 13 and the pin 16 are the same and are fixed, the blade | wing 9 moves on the opening part 3 in parallel. The opposite is true when the arm 4 is rotated clockwise.
[0029]
Further, the arm 6 is slidably provided with a shaft portion 19 fixed (or integrally formed) with the substrate 2 as a fulcrum, and is rotatably connected to the blade 8 by a blade stopper pin 20. Therefore, when the arm 4 rotates counterclockwise about the shaft portion 11, power is transmitted to the arm 6 via the blade 8, and the arm 6 rotates counterclockwise about the shaft portion 19. At this time, since the interval between the shaft portions 11 and 19 and the interval between the blade stopper pins 12 and 20 are the same and fixed, the blade 8 moves in parallel on the opening 3. The opposite is true when the arm 4 is rotated clockwise.
[0030]
Here, each shaft portion (11, 15, 19) and each blade (8, 9, 10) are connected to each other (14 and 18, 13 and 17 (however, substantially 16), 12 and 20). Since the blade 10 is the longest and the blade 8 is the shortest, the movement distance of each blade (8, 9, 10) by the rotation of the arm 4 is the longest for the blade 10 and the shortest for the blade 8. Therefore, when the arm 4 is rotated counterclockwise from the unfolded state of the sector unit with the opening 3 closed, the blades (8, 9, 10) open the opening 3 while increasing their overlap with each other. Translate like so. This operation is called an opening operation, and the overlapping state of the sector units with the opening 3 opened is called an opening state. FIG. 4 shows the configuration when the sector units are superimposed. Further, when the arm 4 is rotated clockwise from this open state, the blades (8, 9, 10) move in parallel so as to close the top of the opening 3 while increasing the displacement. This operation is called a closing operation. As described above, the blades (8, 9, 10) are in the expanded state in the closed state, and the blades (8, 9, 10) are superimposed in the open state. FIG. 3 shows the configuration of the sector unit in the expanded state. As described above, the image frame opening / closing device 1 according to the present embodiment has a sector unit having a configuration of a parallel link mechanism in which each blade reciprocates while maintaining a parallel state, and changes between a developed state and a superimposed state. Configured.
[0031]
The sector unit having the above-described configuration includes a substrate 2, a blade receiving plate 26 having an opening 27 at least in a region overlapping with the opening 3, and spacers 28, 29, 30 for fixing the same to the substrate 2. , 31 are accommodated in a space (sector chamber).
[0032]
In the configuration as described above, when the sector unit is shifted from the superimposed state to the deployed state, the blades 8, 9, and 10 are crimped to the arms 4, 5, and 6, as shown in FIG. One side and the other side (referred to as the tip) overrun due to inertia and bend. This deflection is suppressed with respect to the blades (corresponding to the blades 8 and 10) whose front and rear ends (left and right ends in the drawing) and upper / lower ends are pressed by the blade receiving plate 26, but the upper and lower ends of the body portion are As for the blades (corresponding to the blades 9) exposed from the opening 3 (or 27), only the front and rear ends are pressed down, so that the blades 9 are removed from the opening 3 as shown in FIG. It protrudes in the direction of the optical axis. FIG. 5B is a cross-sectional view taken along the line X1-X1 in FIG.
[0033]
In order to solve such a problem, in the present embodiment, as shown in FIG. 3, when the sector unit is in the deployed state, the blades other than the blade 10 with the longest moving distance (this is called the leading blade), For example, a locking claw 23 is provided for locking the blade 9 located between the front and rear blades. The locking claw 23 functions as a stopper member that prevents overrun of the blade 9. Therefore, when the sector unit moves to the unfolded state, the locking claw 23 and the blade 9 collide with each other, so that the tip of the blade 9 can be prevented from being overrun. The blade does not protrude from 3.
[0034]
Here, the enlarged view of the latching claw 23 is shown in FIG. As shown in FIG. 6, the locking claw 23 according to the present embodiment is formed integrally with the substrate 2, and the body portion is thinner than the locking portion with the blade 9 in order to reduce the impact caused by the collision with the blade 9. It has a different shape. In addition, in order to prevent other than the blade 9 from coming into contact with the locking claw 23, the target blade 9 is configured to be longer than the other blades (particularly the blade 10) in this embodiment. Thereby, it can comprise so that the latching claw 23 may collide only with the blade | wing 9, and a movement of the other blade | wing is not interrupted by the latching claw 23. By integrally forming the locking claw 23 with the substrate 2, it is possible to prevent an increase in the number of parts of the image frame opening / closing device 1, and thus it is possible to prevent an increase in manufacturing cost and a complicated manufacturing process.
[0035]
Furthermore, the locking claw 23 according to the present embodiment is provided so as to collide with the tip of the blade 9. That is, the portion that overruns when stopping is noticeable on the tip side of the blade 9. Therefore, in the present embodiment, the configuration in which the vicinity of the tip where this overrun becomes noticeable is locked by the locking claw 23 prevents the blade 9 from being overrun efficiently.
[0036]
Further, the substrate 2 according to the present embodiment can be formed of, for example, a plastic material such as polycarbonate containing carbon graphite, but any other resin or the like generally used as a substrate can be used. Can also be applied.
[0037]
As described above, according to the present embodiment, the overrun of the blades other than the head in the advancing direction at the time of deployment can be suppressed by the locking claws integrally formed with the substrate. Contact with a member (such as an optical filter) can be prevented, and damage to blades or other members can be prevented. Moreover, in this embodiment, since it is not necessary to harden a blade | wing, the enlargement of an apparatus and the speed reduction of a blade | wing can be prevented. As shown in FIG. 3 or FIG. 4, contact portions 24, 25 are provided at the stop position as a configuration for preventing the overrun of the blades 8, 9, 10 when shifting from the deployed state to the superimposed state. ing.
[0038]
Further, when the way of overlapping of the blades 8, 9, 10 is opposite to that described above (when the blade 10 is the uppermost and the blade 8 is the lowest) (the blades 8 ', 9', 10 ′)), the body portion of the blade 9 ′ protrudes from the opening 27 as shown in FIG. 7B when the state is shifted from the superimposed state to the deployed state. It can prevent that the trunk | drum part of blade | wing 9 'protrudes from the opening part 27 by the structure (locking claw 23) similar to a structure. FIG. 7B is a cross-sectional view taken along the line X2-X2 in FIG.
[0039]
[Second Embodiment]
Next, a second embodiment of the present invention will be described in detail with reference to the drawings. In 1st Embodiment, the case where the latching claw 23 integrally formed with the board | substrate 2 was used was mentioned as an example as a stopper member of blade | wings other than the blade | wing located in the head with respect to the advancing direction. However, the present invention is not limited to this, and a stopper member for suppressing the overrun of the blades can be formed by a member different from the substrate 2.
[0040]
Therefore, in this embodiment, as shown in FIG. 8, the contact portion 43 that collides with the blades other than the head at the time of deployment is formed of a member different from the substrate 2, and this is the locking claw in the first embodiment. At the same position as 23. Here, the contact portion 43 is made of impact such as natural rubber, styrene rubber, butyl rubber, nitrile rubber, chloroprene rubber, neoprene rubber, ethylene / propylene rubber, hypalon, acrylic rubber, urethane rubber, silicone rubber, fluorine rubber, and others. It is formed of an elastic member that can absorb.
[0041]
Thus, by providing the contact portion 43 formed of an elastic member at a position where it collides with a blade other than the head during deployment, the blade can be prevented from overrun. It can avoid protruding and contacting with other members (optical filter etc.), and it can prevent that a wing | blade or another member is damaged. Since other configurations are the same as those of the first embodiment, description thereof is omitted here.
[0042]
[Other Embodiments]
The embodiment described above is merely a preferred embodiment of the present invention, and the present invention can be variously modified and implemented without departing from the gist thereof. For example, in the first and second embodiments described above, the case where the image frame opening / closing device 1 is configured as a protection unit for the image sensor has been described with reference to the drawings. However, as described above, the present invention is not limited thereto. Instead, the image frame opening / closing device 1 according to the present embodiment can be easily formed on the front and back surfaces of the substrate 2 to produce an FP shutter or the like. Thereby, it is possible to prevent the deflected blade from coming into contact with the cell surface of the image sensor and other members when the shutter is opened. Furthermore, since it is not necessary to make the blades heavier or harder in order to realize this, it is possible to prevent an increase in the size of the device and a reduction in the speed of the blades.
[0043]
【The invention's effect】
As described above, according to the present invention, it is possible to prevent the blades from protruding from the opening.
[Brief description of the drawings]
FIG. 1 is a top view showing a configuration of a conventional FP shutter 100. FIG.
FIG. 2 is a top view showing a configuration of an FP shutter 200 provided with a hitting portion according to a conventional technique.
FIG. 3 is a top view showing the configuration of the image frame opening / closing device 1 according to the first embodiment of the present invention (when the image frame is shielded).
FIG. 4 is a top view showing a configuration of the image frame opening / closing apparatus 1 according to the first embodiment of the present invention (when the image frame is opened);
FIG. 5 is a view showing an overrun of the blade 9 at the time of unfolding that occurs when the locking claw 23 is not formed, and (a) is a top view of the image frame forming apparatus 1 when overrun; ) Is an X1-X1 cross-sectional view thereof.
FIG. 6 is an enlarged view of the locking claw 23 according to the first embodiment of the present invention.
7 is a diagram showing a configuration when the overlapping of the blades 8, 9, and 10 is reversed in the image frame opening / closing apparatus 1 shown in FIG. 3 or FIG. 4, and (a) is an image frame formation when overrun. It is a top view of the apparatus 1, (b) is the X2-X2 sectional drawing.
FIG. 8 is an enlarged view of a contact portion 43 according to the second embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Image frame opening / closing apparatus 2 Board | substrate 3, 27 Opening part 4, 5, 6 Arm 7 Auxiliary arm 8, 8 ', 9, 9', 10, 10 'Blade | wing 11, 15, 19 Shaft part 12, 13, 14, 17 , 18, 20 Blade stop pin 16 Pin 21 Drive lever 21a Drive pin 22 Slot 23 Locking claw 24, 25, 43 per contact portion 26 Blade receiving plate 28, 29, 30, 31 Spacer

Claims (6)

複数の羽根を重畳状態から展開状態へ移行するセクタユニットと、前記展開状態時に前記複数の羽根により閉鎖される開口部を有する基板とを含んで構成された画枠開閉装置において、
前記展開状態時に前記複数の羽根における進行方向に対して先頭以外の羽根に当接するストッパ部材を有することを特徴とする画枠開閉装置。
In the image frame opening and closing apparatus configured to include a sector unit that shifts a plurality of blades from a superimposed state to a deployed state, and a substrate having an opening that is closed by the plurality of blades in the deployed state,
An image frame opening / closing apparatus comprising: a stopper member that abuts against a blade other than the head in the advancing direction of the plurality of blades in the unfolded state.
複数の羽根を重畳状態から展開状態へ移行するセクタユニットと、前記展開状態時に前記複数の羽根により閉鎖される第1の開口部を有する基板と、該基板と所定の間隔を隔てて固定されることで前記セクタユニットを収納するセクタ室を形成する羽根受け板とを含んで構成された画枠開閉装置において、
前記羽根受け板は前記第1の開口部と重畳する領域に第2の開口部を有し、
前記基板および前記羽根受け板の少なくとも一方には、前記展開状態時に前記複数の羽根における進行方向に対して先頭以外の羽根に当接するストッパ部材を有することを特徴とする画枠開閉装置。
A sector unit that shifts a plurality of blades from a superimposed state to a deployed state, a substrate having a first opening that is closed by the plurality of blades in the deployed state, and a fixed distance from the substrate. In the image frame opening and closing device configured to include a blade receiving plate that forms a sector chamber that houses the sector unit.
The blade receiving plate has a second opening in a region overlapping with the first opening,
An image frame opening and closing device, wherein at least one of the substrate and the blade receiving plate has a stopper member that abuts against a blade other than the head in the advancing direction of the plurality of blades in the unfolded state.
前記ストッパ部材は、胴体部分が前記羽根との当接部分よりも細く形成され弾性変形可能な構成であることを特徴とする請求項1又は2記載の画枠開閉装置。The image frame opening / closing apparatus according to claim 1 or 2, wherein the stopper member has a body portion formed thinner than a contact portion with the blade and is elastically deformable. 前記ストッパ部材は前記基板に一体形成されていることを特徴とする請求項3記載の画枠開閉装置。4. The image frame opening / closing apparatus according to claim 3, wherein the stopper member is integrally formed with the substrate. 前記ストッパ部材は前記羽根との当接部分が弾性部材で形成されていることを特徴とする請求項1又は2記載の画枠開閉装置。The image frame opening / closing apparatus according to claim 1 or 2, wherein the stopper member is formed of an elastic member at a contact portion with the blade. 前記ストッパ部材は前記羽根を移動させるためのアームと該羽根とがカシメられた部分の反対側の端で該羽根と当接するように設けられていることを特徴とする請求項1から5の何れか1項に記載の画枠開閉装置。6. The stopper member according to claim 1, wherein the stopper member is provided so as to contact the blade at an end opposite to a portion where the blade for moving the blade and the blade is crimped. The image frame opening / closing apparatus according to claim 1.
JP2003185131A 2003-06-27 2003-06-27 Picture frame opening and closing device Expired - Lifetime JP4276004B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2416216A1 (en) * 2010-08-05 2012-02-08 Samsung Electronics Co., Ltd. Shutter device and image capturing apparatus having the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2416216A1 (en) * 2010-08-05 2012-02-08 Samsung Electronics Co., Ltd. Shutter device and image capturing apparatus having the same
CN102375289A (en) * 2010-08-05 2012-03-14 三星电子株式会社 Shutter device and image capturing apparatus having the same
US8550729B2 (en) 2010-08-05 2013-10-08 Samsung Electronics Co., Ltd Shutter device and image capturing apparatus having the same
CN102375289B (en) * 2010-08-05 2016-11-16 三星电子株式会社 Shutter device and there is its image capture apparatus

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