JP4044809B2 - Displacement amount control device and imaging device - Google Patents

Description

【０００１】
【発明の属する技術分野】
本発明は、圧電アクチュエータなどの電気機械変換手段を用いた変位量制御装置および、この変位量制御装置を組み込んでなる手振れ補正機能付き撮像装置（例えばデジタルカメラ）に関するものである。
【０００２】
【従来の技術】
近年、デジタルカメラがビジネスからパーソナルまで、分野を問わず幅広く普及し始め、またユーザから様々な要求もあり、多くの機能を備えた機種が増えてきた。
【０００３】
しかし、これに伴い、撮影時の手振れによる画像のぼけが問題になっている。その原因としては、（１）デジタルカメラの小型軽量化が進み、コンパクトで持ち運びが便利になった反面、撮影時のカメラの把持性が低下したこと、（２）液晶ファインダを利用するため、光学ファインダを使用しなくなったことから、カメラを身体から離して行う片手撮影などのスタイルが生じて、撮影時の安定性が低下したこと、などが挙げられる。また、多くのカメラメーカでは、他社製品との差別化等の目的で、高倍率ズームを備えたものを開発しているが、このようなカメラにあっては、高倍率撮影を手持ち撮影で行う場合の手振れが回避しにくい状況になっている。
【０００４】
この問題を解決するため、圧電素子等の電気機械変換素子により撮像素子のみを、手振れに応じて移動させることを骨子とする発明がいくつか提案されているが、これらの発明に係る特許出願明細書または図面には、撮像素子を移動させるための移動手段についての詳細構造が明示されていない。また、この移動手段の寸法が、小型のデジタルカメラに搭載するにはかなり大きく、カメラ構造が相当複雑になるため、コスト高になるという問題もあった。
【０００５】
特開２０００−３０７９３７号公報には、簡単かつ小型の機構で撮像素子の平行移動を実現することにより、デジタルカメラの手振れに起因する画像ぼけを防止するようにした、画像振れ防止機能付きの撮像装置が開示されている。この撮像装置は、撮像素子を圧電アクチュエータに直結することにより、撮像素子を平行移動させるものであり、圧電アクチュエータを用い、手振れに応じて撮像素子を機械的に駆動させるようにしている。
【０００６】
【発明が解決しようとする課題】
上記発明に係る撮像装置では、撮像素子と圧電素子（電気機械変換素子）との接続を、接着により行っている。すなわち、圧電素子単体あるいは変位拡大機構を有する圧電アクチュエータの一端を接合部材に接着した構造になっている。しかしながら、このような構造では、圧電素子が自由に伸縮することできない。また、上記撮像装置にあっては、撮像素子の駆動安定化のためにバネを用いているが、圧電素子の伸縮に伴いバネの力量（弾発力）が変化する結果、所望の性能を圧電アクチュエータが発揮するのが難しくなるという不具合がある。
【０００７】
本発明は、従来技術の上記問題点に鑑みなされたもので、その第１の目的は、電気機械変換素子の伸縮機能を十分に発揮させることができで、高精度の変位量を得ることができる変位量制御装置を提供することにある。本発明の第２の目的は、この変位量制御装置を用いて構成した撮像装置を提供すること、すなわち、撮像素子と変位量制御装置（電気機械変換手段）を、「接着」によらない接続構造で接続することにより、高精度な手振れ補正機能を有する撮像装置を提供することにある。
【０００８】
【課題を解決するための手段】
請求項１に係る発明は、電気機械変換手段と、この電気機械変換手段に固着された伸縮性材料からなる帯状部材とを備えた変位量制御装置であって、前記電気機械変換手段では、電気機械変換素子の一側および、他側にそれぞれ押さえ板を設けてこれらの押さえ板同士を互いに対向させ、これらの押さえ板間に一対の板バネを湾曲状態で、かつ互いに対向させて架設するとともに、電気機械変換素子の伸縮により前記板バネの曲率増減に伴う変位を発生させるようにし、前記帯状部材は、前記板バネの一方または双方の、電気機械変換素子よりも外側に向く面に、当該帯状部材の長手方向両端部を固着し、前記板バネと前記帯状部材との対向間隙に、連結部材により撮像手段と連結する係止片が挿入されており、当該係止片は、前記板バネ及び前記帯状部材に対して固着されていない状態で挟持されていることを特徴とする変位量制御装置である。
【０００９】
請求項２に係る発明は、前記帯状部材が、ゴムまたは熱可塑性エラストマーからなることを特徴とする請求項１に記載の変位量制御装置である。
【００１０】
請求項３に係る発明は、前記押さえ板の一方を電気機械変換素子の一端面に固着し、他方の押さえ板の中央部に押さえネジを貫通状態で螺合するとともに、前記押さえネジの一端部を電気機械変換素子の他端面に当接させたことを特徴とする請求項１または２に記載の変位量制御装置である。
【００１１】
請求項４に係る発明は、撮像光学系と、これを通過した被写体像を受光して画像信号に変換する撮像手段を有する撮像装置であり、当該撮像装置の所定位置に固定配備された請求項１，２または３に係る変位量制御装置と、先端を係止片とした連結部材を有する撮像手段とを備えたものであって、前記変位量制御装置の帯状部材と板バネとの対向間隙に前記連結部材の係止片を挿入して該係止片を帯状部材と板バネとで挟持し、電源装置から所要の電圧を前記電気機械変換素子に印加するようにしたことを特徴とする撮像装置である。
【００１２】
請求項５に係る発明は、上面に１本の直線状長溝が形成されているか、または上面に２本以上の直線状長溝が互いに平行に形成され、当該撮像装置の所定位置に固定配備された第１の板体および、下面側に突出する突起が前記長溝の対応位置に設けられた第２の板体を積層して構成された積層体と、変位量制御装置と、第２の板体の上面に固着された撮像手段とを備えてなる撮像装置であって、前記積層体では、第２の板体の突起が第１の板体の長溝に挿入され、これらの突起の移動が前記長溝で直線的に案内されるように、かつ第２の板体の下面が第１の板体の上面に対し摺動しうるように構成され、第２の板体または前記撮像手段は、前記連結部材を介して変位量制御装置に連結され、前記変位量制御装置が作動したときに、第２の板体および撮像手段が、前記長溝に案内されることにより一体的に、かつ直線的に所望距離だけ移動自在となっていることを特徴とする請求項４に記載の撮像装置である。
【００１３】
請求項６に係る発明は、撮像光学系と、これを通過した被写体像を受光して画像信号に変換する撮像手段とを有する撮像装置であって、当該撮像装置の所定位置に固定配備された請求項１，２または３に係る第１の変位量制御装置と、この第１の変位量制御装置に接続された接続部材と、この接続部材に接続された請求項１，２または３に係る第２の変位量制御装置と、この第２の変位量制御装置に接続された撮像手段とを備えてなり、第１の変位量制御装置の電気機械変換素子に電源装置から所要の電圧を印加することにより、前記撮像手段と第２の変位量制御装置とを、一体的にＸ方向に所望距離だけ移動自在とし、第２の変位量制御装置の電気機械変換素子に電源装置から所要の電圧を印加することにより、前記撮像手段をＹ方向に所望距離だけ移動自在としたことを特徴とする撮像装置である。
【００１４】
請求項７に係る発明は、上面に１本の直線状長溝が形成されているか、または上面に２本以上の直線状長溝が互いに平行に形成され、当該撮像装置の所定位置に固定配備された第１板体、上面に１本の直線状長溝が形成されているか、または上面に２本以上の直線状長溝が互いに平行に形成され、下面側に突出する突起が前記第１板体の長溝の対応位置に設けられた第２板体および、下面側に突出する突起が前記第２板体の長溝の対応位置に設けられた第３板体を積層して構成された積層体と、第２板体に前記連結部材を介して連結された第１の変位量制御装置と、第３板体の上面に固着された撮像手段と、第３板体または前記撮像手段に前記連結部材を介して連結された第２の変位量制御装置とを備えてなる撮像装置であって、前記積層体では、第２板体の長溝が、第１板体の長溝に直交し、第３板体の突起が第２板体の長溝に挿入され、これらの突起の移動が前記長溝で直線的に案内されるように、かつ第３板体の下面が第２板体の上面に対し摺動しうるように構成され、第２板体の突起が第１板体の長溝に挿入され、これらの突起の移動が前記長溝で直線的に案内されるように、かつ第２板体の下面が第１板体の上面に対し摺動しうるように構成され、第１の変位量制御装置が作動したときに、第２板体、第３板体および撮像手段が、第１板体の長溝によって案内されることにより一体的にＸ方向に移動し、第２の変位量制御装置が作動したときに、第３板体および撮像手段が、第２板体の長溝に案内されることにより一体的にＹ方向に移動するように構成されていることを特徴とする請求項６に記載の撮像装置である。
【００１５】
【発明の実施の形態】
本発明の実施の形態を、図面をもとに説明する。
第１の実施の形態（請求項１〜３に係るもの）
図１は変位量制御装置の構造を示す平面図である。この変位量制御装置１１−１は、電気機械変換手段としての圧電アクチュエータ１１と、これに固着された伸縮性材料からなる帯状部材１０とからなる。この変位量制御装置１１−１の全体構造は、図２の斜視図に示すとおりである。
【００１６】
変位量制御装置１１−１を以下のように構成する。圧電アクチュエータ１１では、電気機械変換素子としての圧電素子１の一側、他側に長方形の押さえ板２，３を設けてこれらの押さえ板同士を互いに対向させる。この場合、押さえ板３を圧電素子１の一端面に固着する。押さえ板２の中央部に押さえネジ（ネジ軸）６を貫通状態で螺合するとともに、押さえネジ６の一端部を圧電素子１の他端面に当接させる。これらの押さえ板２，３間に一対の板バネ４，５を湾曲状態で、かつ互いに対向させて架設する。これらの板バネ４，５は、長手方向中央部が湾曲の頂部となっていて、この頂部が板バネ両端部よりも、圧電素子１に接近した形態になっている。しかし、これと逆に頂部が板バネ両端部よりも、圧電素子１から離れた形態に、板バネを設けても良い。また、圧電素子１に代えて他の電気機械変換素子を用いることもできる。
【００１７】
ゴムまたは熱可塑性エラストマーからなる帯状部材１０を、板バネ５両面のうち、圧電素子１よりも外側に向く面に、例えば接着により固着する。この場合、帯状部材１０の長手方向両端部を固着する。なお、帯状部材１０を板バネ４にも、板バネ５の場合と同じ形態で設けることができる。
【００１８】
この変位量制御装置１１−１では、押さえネジ６の回転により、押さえ板２が圧電素子１に対し接近または離反する。これによって（自由状態の）板バネ４，５の湾曲の曲率が増減し、湾曲頂部と圧電素子１の側面との間隔が調整される。電源装置（図略）から電圧を圧電素子１に印加すると、これが図１の矢印Ａ１，Ａ２の向きに伸びて押さえ板２，３間の間隔が増大する結果、板バネ４，５の湾曲曲率が低下するとともに、板バネ４，５が矢印Ｂ１，Ｂ２の向きに変位する。このように、前記印加電圧の調整により、前記板バネの変位量を制御することができる。したがって、板バネ５と帯状部材１０との間隙に、適宜部材（または適宜部材の一部）を挿入し、これを板バネ５と帯状部材１０とで挟持し（この部材は、帯状部材１０の伸縮力によって板バネ５側に圧接される。）、この状態で電圧を圧電素子１に印加することにより、前記部材の変位量を制御することができる。
【００１９】
本実施の形態では、前記適宜部材が板バネ５に接着されておらず（つまり係止片９ｂが固着されておらず）、しかも前記適宜部材が板バネ５に常時圧接されているため、該部材・板バネ５間に「ガタ」が生じるこなく、板バネ５の変位を該部材に高精度に伝えることができ、後者の変位量は常に前者の変位量に等しくなる。
【００２０】
第２の実施の形態（請求項４に係るもの）
本実施の形態に係る撮像装置は、図１の変位量制御装置１１−１を用いて構成したものである。図２はこの撮像装置の要部構造を示す概略斜視図であり、図３は、この撮像装置を構成する手振れ補正部の構造を示すブロック図である。この撮像装置は、撮像光学系と、これを通過した被写体像を受光して画像信号に変換する撮像手段（図２）と、手振れ補正部（図３）と、この手振れ補正部を構成する変位量制御装置１１−１等を備えて構成されている。
【００２１】
本実施の形態の撮像装置は、図１の変位量制御装置１１−１と、これに接続された、基板８および撮像素子７を有する撮像手段１２とを備えている。図２の撮像装置をつぎように構成する。変位量制御装置１１−１を、この撮像装置の所定位置に固定配備する。先端に係止片（円筒状の軸体）９ｂを設けた連結部材９ａを、撮像手段１２に固着する。係止片９ｂは、軸線を撮像素子７に垂直になるように設ける。変位量制御装置１１−１の帯状部材１０と板バネ５との対向間隙に係止片９ｂを挿入し、この係止片を帯状部材１０と板バネ５とで挟持する。これにより常時、係止片９ｂの外周面の一部を板バネ５に圧接させる。この圧接力は、帯状部材１０の伸縮力により生じる。
【００２２】
電源装置（図略）から所要の電圧を圧電素子１に印加することで、撮像手段１２が矢印Ｂの向きに所定量だけ変位する。電圧印加を解除すれば撮像手段１２は、図２に示す元の位置に戻る。このように、変位量制御装置１１−１は、１次元（１方向）変位量制御装置として機能する。
【００２３】
本実施の形態では、係止片９ｂが板バネ５に接着されておらず、つまり係止片９ｂが固着されておらず、しかも係止片９ｂが板バネ５に常時圧接されているため、係止片９ｂ・板バネ５間に「ガタ」が生じるこなく、板バネ５の変位を撮像手段１２に高精度に伝えることができ、後者の変位量は常に前者の変位量に等しくなる。
【００２４】
ここで図３をもとに、前記手振れ補正部の構造を作用とともに説明する。撮像手段１２に取り付けられた１つの、画像センサからなる手振れ検出手段（手振れ検出センサ）５１により、手振れ量を検出する。この手振れ検出手段５１からの信号を、Ａ／Ｄ変換手段５２を介して、カメラ移動量計算手段５３に入力する。カメラ移動量計算手段５３は、撮像手段１２の手振れによる姿勢変化量、並進変化量といった移動量の一部または全部を算出する。つぎに、アクチュエータ移動量計算手段５４（撮像手段移動量計算手段）は、カメラ移動量計算手段５３での算出結果をもとに、手振れによる像の移動をキャンセルする分の撮像手段１２の移動量を計算する。この撮像手段移動量信号を、Ｄ／Ａ変換を伴った昇圧回路５５に送る。この昇圧回路５５は、前記移動量に応じた変位が撮像手段に生じるように、圧電アクチュエータ１１に駆動電圧を供給する。
【００２５】
このように、図３の手振れ補正部は、カメラの手振れを検出し、これをキャンセルするように、撮像手段１２を変位量制御装置１１−１で移動させるものである。なお、図２のように、変位量制御装置１１−１が１次元変位量制御装置として機能する場合には、この変位量制御装置１１−１、したがって圧電アクチュエータ１１は１個設けられる。
【００２６】
第３の実施の形態（請求項５に係るもの）
図４は図２の改変例に係るもので、撮像装置の要部構造を示す分解斜視図である。この撮像装置は、撮像光学系と、これを通過した被写体像を受光して画像信号に変換する撮像手段（図４）と、手振れ補正部（図３）と、この手振れ補正部を構成する変位量制御装置１１−１等を備えており、図２の変位量制御装置１１−１による１次元変位量制御を、ガイド機構を用いることで、より高精度に行うように構成したものである。
【００２７】
この撮像装置の要部を所定の積層体と、変位量制御装置１１−１とで構成する。前記積層体は、上面に２本の直線状長溝（ガイド溝）１６，１７を互いに平行に形成した第１の板体１５と、下面側に突出する突起１９，２０を長溝１６，１７の対応位置に形成し、かつ連結部材９ａを設けた第２の板体１８とを積層して構成する。第１の板体１５は、この撮像装置の所定位置に固定配備する。第２の板体１８の上面に撮像手段（図略）を固着するとともに、この板体１８を連結部材９ａを介して変位量制御装置１１−１に連結する。この場合、板体１８の突起１９，２０を板体１５の長溝１６，１７に挿入し、これらの突起の移動が長溝１６，１７で直線的に案内されるように、かつ板体１８の下面が板体１５の上面に対し摺動するように構成する。
【００２８】
この撮像装置では、変位量制御装置１１−１が作動したときに、板体１８および撮像手段が、長溝１６，１７で案内されながら一体的に、かつ直線的に所望距離だけ、板体１５に対しスライド（同一平面上を摺動）しながら一次元移動するため、撮像手段変位の直線性が更に向上する。前記ガイド溝および突起の配備数は、変位の直線性が向上するのであれば、１つでも良いし、３つ以上でも良く、図４に示すような２つの場合に限定されるものではない。
【００２９】
第４の実施の形態（請求項６，７に係るもの）
図５は図４の改変例に係るもので、撮像装置の要部構造を示す分解斜視図である。この撮像装置は、撮像光学系と、これを通過した被写体像を受光して画像信号に変換する撮像手段と、手振れ補正部（図３）と、この手振れ補正部を構成する２つの変位量制御装置等を備えている。すなわちこの撮像装置は、撮像手段を光軸に垂直な平面内の所望位置に移動させることにより手振れを補正するようにしたものであって、第１の変位量制御装置および第２の変位量制御装置による２次元変位量制御を、ガイド機構を用いることで、より高精度に行うように構成したものである。
【００３０】
この撮像装置の要部を所定の積層体と、前記２つの変位量制御装置とで構成する。前記積層体は、（１）２本の直線状長溝２６，２７を互いに平行に形成して、この撮像装置の所定位置に固定配備した第１板体２１、（２）上面に２本の直線状長溝３１，３２を互いに平行を形成し、下面側に突出する突起２４，２５を長溝２６，２７の対応位置に設けた第２板体２２および、（３）下面側に突出する突起２９，３０を第２板体２２の長溝３１，３２の対応位置に設けた第３板体２３を積層して構成する。
【００３１】
前記積層体では、第２板体２２の長溝３１，３２を、第１板体２１の長溝２６，２７に直交させ、第３板体２３の突起２９，３０を第２板体２２の長溝３１，３２に挿入し、これらの突起の移動を前記長溝で直線的に案内するように、かつ第３板体２３の下面が第２板体２２の上面に対し摺動自在に構成する。また、第２板体２２の突起２４，２５を第１板体２１の長溝２６，２７に挿入し、これらの突起の移動を前記長溝で直線的に案内するように、かつ第２板体２２の下面が第１板体２１の上面に対し摺動しうるように構成する。
【００３２】
さらに、第２板体２２に第１の変位量制御装置（図略）を、図４に示す連結部材９ａと同様の連結部材を介して連結する。第３板体２３の上面に撮像手段（図略）を固着し、撮像手段または第３板体２３に第２の変位量制御装置を、前記連結部材９ａと同様の連結部材を介して連結する。
【００３３】
この撮像装置では、第１の変位量制御装置を構成する圧電素子に所定電圧を印加して、この変位量制御装置を作動させると、第２板体２２、第３板体２３撮像手段および第２の変位量制御装置が、第１板体２１の長溝２６，２７によって案内されることにより、一体的に図５のＸの向きに所望距離だけ、第１板体２１に対し摺動移動する。また、第２の変位量制御装置が作動すると、撮像手段および第３板体２３が図５のＹの向きに所望距離だけ、第２板体２２に対し摺動移動する。
【００３４】
【発明の効果】
以上の説明で明らかなように、本発明によれば以下の効果が得られる。
（１）請求項１〜３の発明による効果
本発明に係る、圧電素子等の電気機械変換素子からなる変位量制御装置では、変位させるべき部材（等）が板バネに接着されておらず（つまり、前記部材が固着されておらず）、しかも前記部材が、伸縮性材料からなる帯状部材によって常時板バネに圧接されているため、該部材・板バネ間に「ガタ」が生じることなく、板バネの変位を該部材に高精度に伝えることができ、後者の変位量は常に前者の変位量に等しくなる。
【００３５】
特に、請求項２に係る変位量制御装置では、前記帯状部材がゴムまたは熱可塑性エラストマーからなるため、変位量制御の精度が更に高まる。また、請求項３の変位量制御装置では、押さえネジにより、自由状態の板バネの湾曲曲率を増減するようにしたため、帯状部材・板バネ間の対向間隙を調整することができるので直径、太さ、または厚さが異なる種々の部材に対応することが可能となる。
【００３６】
（２）請求項４の発明による効果
本発明では、請求項１，２または３に係る変位量制御装置を用いて撮像手段を変位させるように構成したので、撮像手段の変位量制御を高精度に行うことができる。特に、所定構成の手振れ補正部を付加することにより、「画像ぼけ」のない画像を安定して得ることができる。したがって、簡単かつ小型な機構で、安定した画像振れ防止機能を備えたデジタルカメラ等の撮像装置を提供することができる。
【００３７】
（３）請求項５の発明による効果
撮像手段を、ガイド機構により案内しながら変位させるようにしたので、撮像手段変位の直線性がより向上し、画像振れ防止精度の高いデジタルカメラ等の撮像装置を提供することができる。
【００３８】
（４）請求項６，７の発明による効果
撮像手段をＸ方向およびＹ方向に変位自在としたので、撮像手段を光軸に垂直な平面内の所望位置に移動させることにより手振れを補正することができ、画像振れ防止精度の高いデジタルカメラ等の撮像装置を提供することができる。特に請求項７の発明では、第１の変位量制御装置および第２の変位量制御装置による２次元変位量制御を、ガイド機構を用いて行うように構成したので、Ｘ方向およびＹ方向の変位の直線性が更に向上し、画像振れ防止精度が極めて高いデジタルカメラ等の撮像装置を提供することができる。
【図面の簡単な説明】
【図１】本発明の第１の実施の形態に係るもので、変位量制御装置の構造を示す平面図である。
【図２】本発明の第２の実施の形態に係るもので、図１の変位量制御装置を用いて構成した撮像装置の要部構造を示す概略斜視図である。
【図３】図２の撮像装置を構成する手振れ補正部の構造を示すブロック図である。
【図４】本発明の第３の実施の形態に係るもので、図１の変位量制御装置を用いて構成した撮像装置の要部構造を示す分解斜視図である。
【図５】本発明の第４の実施の形態に係るもので、図１の変位量制御装置を用いて構成した撮像装置の要部構造を示す分解斜視図である。
【符号の説明】
１：圧電素子
２：押さえ板
３：押さえ板
４：板バネ
５：板バネ
６：押さえネジ（ネジ軸）
７：撮像素子
８：基板
９ａ：連結部材
９ｂ：係止片
１０：帯状部材
１１：圧電アクチュエータ
１１−１：変位量制御装置
１２：撮像手段
１５：第１の板体
１６，１７：長溝
１８：第２の板体
１９，２０：突起
２１：第１板体
２２：第２板体
２３：第３板体
２４，２５：突起
２６，２７：長溝
２９，３０：突起
３１，３２：長溝[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a displacement control device using electromechanical conversion means such as a piezoelectric actuator, and an imaging device (for example, a digital camera) with a camera shake correction function incorporating the displacement control device.
[0002]
[Prior art]
In recent years, digital cameras have begun to spread widely regardless of the field, from business to personal use, and there have been various requests from users, and the number of models equipped with many functions has increased.
[0003]
However, along with this, blurring of images due to camera shake at the time of shooting has become a problem. The reasons are as follows: (1) Digital cameras have become smaller and lighter, making them more compact and easier to carry, but lowering the grip of the camera during shooting, and (2) using a liquid crystal viewfinder, Since the use of the viewfinder is no longer used, a one-handed shooting style that takes the camera away from the body has occurred, and stability during shooting has decreased. In addition, many camera manufacturers have developed a camera with a high-power zoom for the purpose of differentiation from other companies' products. For such cameras, high-power shooting is performed by hand-held shooting. It is difficult to avoid camera shake.
[0004]
In order to solve this problem, there have been proposed several inventions based on the principle of moving only an image pickup element in accordance with hand shake by an electromechanical conversion element such as a piezoelectric element. However, patent application specifications relating to these inventions have been proposed. The detailed structure of the moving means for moving the image sensor is not clearly shown in the document or drawing. In addition, the size of the moving means is quite large for mounting on a small digital camera, and the camera structure is considerably complicated, resulting in a high cost.
[0005]
Japanese Patent Laid-Open No. 2000-307937 discloses an imaging with an image blur prevention function that prevents image blur caused by camera shake of a digital camera by realizing parallel movement of an image sensor with a simple and small mechanism. An apparatus is disclosed. This image pickup apparatus moves the image pickup element in parallel by directly connecting the image pickup element to the piezoelectric actuator, and uses the piezoelectric actuator to mechanically drive the image pickup element in accordance with camera shake.
[0006]
[Problems to be solved by the invention]
In the image pickup apparatus according to the above invention, the image pickup element and the piezoelectric element (electromechanical conversion element) are connected by adhesion. That is, the piezoelectric element alone or one end of a piezoelectric actuator having a displacement enlarging mechanism is bonded to the bonding member. However, with such a structure, the piezoelectric element cannot freely expand and contract. In the image pickup apparatus, a spring is used to stabilize the drive of the image pickup element. However, as a result of a change in the amount of spring (elastic force) as the piezoelectric element expands and contracts, the desired performance can be achieved by piezoelectricity. There is a problem that it becomes difficult for the actuator to perform.
[0007]
The present invention has been made in view of the above-described problems of the prior art, and the first object thereof is to sufficiently exhibit the expansion / contraction function of the electromechanical transducer, and to obtain a highly accurate displacement amount. An object of the present invention is to provide a displacement amount control device that can be used. A second object of the present invention is to provide an imaging device configured by using this displacement amount control device, that is, to connect an imaging element and a displacement amount control device (electromechanical conversion means) without using "adhesion". An object of the present invention is to provide an imaging device having a highly accurate camera shake correction function by connecting with a structure.
[0008]
[Means for Solving the Problems]
The invention according to claim 1 is a displacement control device comprising an electromechanical conversion means and a belt-like member made of a stretchable material fixed to the electromechanical conversion means, wherein the electromechanical conversion means A pressure plate is provided on one side and the other side of the mechanical conversion element so that the pressure plates are opposed to each other, and a pair of leaf springs are installed in a curved state and opposed to each other between the pressure plates. The displacement of the leaf spring is increased or decreased by expansion or contraction of the electromechanical transducer, and the belt-like member is disposed on one or both sides of the leaf spring on the surface facing the outer side of the electromechanical transducer. Locking pieces that are fixed to both ends in the longitudinal direction of the belt-like member and are connected to the imaging means by the connecting member are inserted into the opposing gaps between the leaf spring and the belt-like member. And It is the displacement amount control apparatus according to claim which is sandwiched in a state of not being secured to the belt-shaped member.
[0009]
The invention according to claim 2 is the displacement amount control device according to claim 1, wherein the belt-like member is made of rubber or thermoplastic elastomer.
[0010]
According to a third aspect of the present invention, one end of the pressing plate is fixed to one end surface of the electromechanical conversion element, and a pressing screw is threadedly engaged with a central portion of the other pressing plate, and one end portion of the pressing screw. The displacement amount control device according to claim 1, wherein the second end surface of the electromechanical transducer is brought into contact with the other end surface.
[0011]
The invention according to claim 4 is an image pickup apparatus having an image pickup optical system and an image pickup means for receiving a subject image that has passed through the optical system and converting it into an image signal, and is fixedly arranged at a predetermined position of the image pickup apparatus. A displacement amount control device according to 1, 2 or 3 and an imaging means having a connecting member having a tip as a locking piece, wherein the opposing gap between the belt-like member of the displacement amount control device and the leaf spring The engaging piece of the connecting member is inserted into the holding member, the engaging piece is sandwiched between a belt-like member and a leaf spring, and a required voltage is applied to the electromechanical conversion element from the power supply device. An imaging device.
[0012]
In the invention according to claim 5, one straight long groove is formed on the upper surface, or two or more linear long grooves are formed on the upper surface in parallel to each other, and fixedly arranged at a predetermined position of the imaging device. A first plate body, a laminate formed by laminating a second plate body in which a protrusion protruding on the lower surface side is provided at a corresponding position of the long groove, a displacement amount control device, and a second plate body In the imaging device, the projection of the second plate is inserted into the long groove of the first plate, and the movement of these projections is The second plate body or the imaging means is configured to be linearly guided by the long groove and to slide the lower surface of the second plate body relative to the upper surface of the first plate body. The second plate body is connected to the displacement amount control device via the connecting member, and the displacement amount control device is activated. And imaging means, said integrally by being guided by the long groove, and an image pickup apparatus according to claim 4, characterized in that has a linearly movable by a desired distance.
[0013]
The invention according to claim 6 is an imaging apparatus having an imaging optical system and imaging means for receiving a subject image that has passed through the imaging optical system and converting it into an image signal, and is fixedly arranged at a predetermined position of the imaging apparatus. The first displacement amount control device according to claim 1, 2, or 3, the connection member connected to the first displacement amount control device, and the connection device connected to the connection member according to claim 1, 2, or 3. A second displacement amount control device and an imaging means connected to the second displacement amount control device are provided, and a required voltage is applied from the power supply device to the electromechanical transducer of the first displacement amount control device. By doing so, the image pickup means and the second displacement amount control device can be integrally moved by a desired distance in the X direction, and a required voltage is supplied from the power supply device to the electromechanical conversion element of the second displacement amount control device. Is applied to the imaging means in the Y direction. Distance is an imaging apparatus which is characterized in that a freely by the movement.
[0014]
In the invention according to claim 7, one straight long groove is formed on the upper surface, or two or more linear long grooves are formed on the upper surface in parallel to each other, and are fixedly arranged at predetermined positions of the imaging device. One straight long groove is formed on the upper surface of the first plate body, or two or more linear long grooves are formed on the upper surface in parallel with each other, and the protrusion protruding on the lower surface side is the long groove of the first plate body. A second plate body provided at a corresponding position of the second plate body, a laminated body formed by laminating a third plate body provided with a protrusion protruding on the lower surface side at a corresponding position of the long groove of the second plate body, A first displacement amount control device coupled to the two plate bodies via the coupling member; an imaging means fixed to the upper surface of the third plate body; and a third plate body or the imaging means via the coupling member. An imaging device comprising a second displacement amount control device coupled to each other, wherein the laminated body The long groove of the second plate body is orthogonal to the long groove of the first plate body, the protrusions of the third plate body are inserted into the long grooves of the second plate body, and the movement of these protrusions is linearly guided by the long grooves. And the lower surface of the third plate body is slidable with respect to the upper surface of the second plate body, and the protrusions of the second plate body are inserted into the long grooves of the first plate body, and these protrusions Movement is guided linearly by the long groove, and the lower surface of the second plate is slidable with respect to the upper surface of the first plate, and the first displacement control device is activated. When the second plate body, the third plate body, and the imaging means are integrally moved in the X direction by being guided by the long groove of the first plate body, and the second displacement control device is activated. The third plate body and the imaging means are configured to move integrally in the Y direction by being guided by the long groove of the second plate body. An image pickup apparatus according to claim 6, symptoms.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
First embodiment (according to claims 1 to 3)
FIG. 1 is a plan view showing the structure of the displacement control device. The displacement control device 11-1 includes a piezoelectric actuator 11 as electromechanical conversion means and a belt-like member 10 made of a stretchable material fixed to the piezoelectric actuator 11. The overall structure of the displacement control device 11-1 is as shown in the perspective view of FIG.
[0016]
The displacement control device 11-1 is configured as follows. In the piezoelectric actuator 11, rectangular pressing plates 2 and 3 are provided on one side and the other side of the piezoelectric element 1 as an electromechanical conversion element, and these pressing plates are opposed to each other. In this case, the pressing plate 3 is fixed to one end surface of the piezoelectric element 1. A press screw (screw shaft) 6 is screwed into the center portion of the press plate 2 in a penetrating state, and one end portion of the press screw 6 is brought into contact with the other end surface of the piezoelectric element 1. A pair of leaf springs 4 and 5 are installed between the presser plates 2 and 3 in a curved state and facing each other. These plate springs 4 and 5 have a curved central portion in the longitudinal direction, and the top portion is closer to the piezoelectric element 1 than both ends of the plate spring. However, on the contrary, the leaf spring may be provided in a form in which the top portion is farther from the piezoelectric element 1 than the both ends of the leaf spring. Further, instead of the piezoelectric element 1, another electromechanical conversion element can be used.
[0017]
The band-shaped member 10 made of rubber or thermoplastic elastomer is fixed to the surface of the both sides of the leaf spring 5 that faces outward from the piezoelectric element 1 by, for example, adhesion. In this case, both ends in the longitudinal direction of the belt-like member 10 are fixed. The belt-like member 10 can be provided on the leaf spring 4 in the same form as that of the leaf spring 5.
[0018]
In this displacement amount control device 11-1, the pressing plate 2 approaches or separates from the piezoelectric element 1 by the rotation of the pressing screw 6. This increases or decreases the curvature of the curvature of the leaf springs 4 and 5 (in a free state), and adjusts the distance between the curved top and the side surface of the piezoelectric element 1. When a voltage is applied to the piezoelectric element 1 from a power supply device (not shown), this extends in the directions of arrows A1 and A2 in FIG. And the leaf springs 4 and 5 are displaced in the directions of the arrows B1 and B2. Thus, the displacement amount of the leaf spring can be controlled by adjusting the applied voltage. Accordingly, an appropriate member (or an appropriate part of the member) is inserted into the gap between the leaf spring 5 and the belt-like member 10 and is sandwiched between the leaf spring 5 and the belt-like member 10 (this member is formed of the belt-like member 10). The pressure is applied to the leaf spring 5 side by the expansion and contraction force.) By applying a voltage to the piezoelectric element 1 in this state, the amount of displacement of the member can be controlled.
[0019]
In the present embodiment, the appropriate member is not bonded to the leaf spring 5 (that is, the locking piece 9b is not fixed), and the appropriate member is always in pressure contact with the leaf spring 5, There is no “backlash” between the member and the leaf spring 5, and the displacement of the leaf spring 5 can be transmitted to the member with high accuracy, and the latter displacement amount is always equal to the former displacement amount.
[0020]
Second embodiment (according to claim 4)
The imaging apparatus according to the present embodiment is configured using the displacement amount control apparatus 11-1 in FIG. FIG. 2 is a schematic perspective view showing a main part structure of the imaging apparatus, and FIG. 3 is a block diagram showing a structure of a camera shake correction unit constituting the imaging apparatus. This imaging apparatus includes an imaging optical system, imaging means (FIG. 2) that receives a subject image that has passed through the optical system, and converts it into an image signal, a camera shake correction unit (FIG. 3), and a displacement that constitutes the camera shake correction unit. A quantity control device 11-1 is provided.
[0021]
The image pickup apparatus according to the present embodiment includes the displacement amount control device 11-1 shown in FIG. 1 and an image pickup means 12 having a substrate 8 and an image pickup element 7 connected thereto. The imaging apparatus of FIG. 2 is configured as follows. The displacement control device 11-1 is fixedly arranged at a predetermined position of the imaging device. A connecting member 9 a provided with a locking piece (cylindrical shaft) 9 b at the tip is fixed to the imaging means 12. The locking piece 9 b is provided so that the axis is perpendicular to the image sensor 7. A locking piece 9 b is inserted into the opposing gap between the belt-like member 10 and the leaf spring 5 of the displacement amount control device 11-1, and the latching piece is held between the belt-like member 10 and the leaf spring 5. Accordingly, a part of the outer peripheral surface of the locking piece 9b is always pressed against the leaf spring 5. This pressure contact force is generated by the expansion and contraction force of the belt-like member 10.
[0022]
By applying a required voltage to the piezoelectric element 1 from a power supply device (not shown), the imaging means 12 is displaced in the direction of arrow B by a predetermined amount. When the voltage application is canceled, the imaging unit 12 returns to the original position shown in FIG. Thus, the displacement amount control device 11-1 functions as a one-dimensional (one direction) displacement amount control device.
[0023]
In the present embodiment, the locking piece 9b is not bonded to the leaf spring 5, that is, the locking piece 9b is not fixed, and the locking piece 9b is constantly pressed against the leaf spring 5, There is no “backlash” between the locking piece 9b and the leaf spring 5, and the displacement of the leaf spring 5 can be transmitted to the imaging means 12 with high accuracy, and the latter displacement amount is always equal to the former displacement amount.
[0024]
Here, based on FIG. 3, the structure of the camera shake correction unit will be described together with the operation. The amount of camera shake is detected by a camera shake detection unit (camera shake detection sensor) 51 including an image sensor attached to the imaging unit 12. The signal from the camera shake detection unit 51 is input to the camera movement amount calculation unit 53 via the A / D conversion unit 52. The camera movement amount calculation unit 53 calculates a part or all of the movement amounts such as the posture change amount and the translational change amount due to camera shake of the imaging unit 12. Next, the actuator movement amount calculation means 54 (imaging means movement amount calculation means) is based on the calculation result of the camera movement amount calculation means 53, and the movement amount of the imaging means 12 for canceling the image movement due to camera shake. Calculate This imaging means movement amount signal is sent to the booster circuit 55 accompanied by D / A conversion. The booster circuit 55 supplies a drive voltage to the piezoelectric actuator 11 so that a displacement corresponding to the amount of movement occurs in the imaging means.
[0025]
As described above, the camera shake correction unit in FIG. 3 detects the camera shake of the camera and moves the imaging unit 12 by the displacement control device 11-1 so as to cancel the camera shake. As shown in FIG. 2, when the displacement control device 11-1 functions as a one-dimensional displacement control device, this displacement control device 11-1 and therefore one piezoelectric actuator 11 is provided.
[0026]
Third embodiment (according to claim 5)
FIG. 4 is an exploded perspective view showing a main part structure of the imaging apparatus according to the modification of FIG. This imaging apparatus includes an imaging optical system, imaging means (FIG. 4) that receives a subject image that has passed through the optical system, and converts it into an image signal, a camera shake correction unit (FIG. 3), and a displacement that constitutes the camera shake correction unit. 2 is provided, and the one-dimensional displacement amount control by the displacement amount control device 11-1 of FIG. 2 is configured to be performed with higher accuracy by using a guide mechanism.
[0027]
The main part of this imaging device is composed of a predetermined laminate and a displacement control device 11-1. In the laminated body, the first plate 15 having two linear long grooves (guide grooves) 16 and 17 formed in parallel on the upper surface, and the protrusions 19 and 20 protruding on the lower surface side correspond to the long grooves 16 and 17. A second plate body 18 formed at a position and provided with a connecting member 9a is laminated. The first plate 15 is fixedly arranged at a predetermined position of the imaging apparatus. An imaging means (not shown) is fixed to the upper surface of the second plate 18 and the plate 18 is connected to the displacement control device 11-1 via the connecting member 9a. In this case, the protrusions 19 and 20 of the plate 18 are inserted into the long grooves 16 and 17 of the plate 15 so that the movement of these protrusions is linearly guided by the long grooves 16 and 17, and the bottom surface of the plate 18. Is configured to slide relative to the upper surface of the plate 15.
[0028]
In this imaging device, when the displacement control device 11-1 is operated, the plate 18 and the imaging means are integrally and linearly guided to the plate 15 while being guided by the long grooves 16 and 17. On the other hand, since it moves one-dimensionally while sliding (sliding on the same plane), the linearity of the imaging means displacement is further improved. The number of guide grooves and protrusions provided may be one or three or more as long as the linearity of displacement is improved, and is not limited to two cases as shown in FIG.
[0029]
Fourth embodiment (according to claims 6 and 7)
FIG. 5 relates to a modification of FIG. 4 and is an exploded perspective view showing the main structure of the imaging apparatus. This imaging apparatus includes an imaging optical system, an imaging unit that receives a subject image that has passed through the imaging optical system, converts it into an image signal, a camera shake correction unit (FIG. 3), and two displacement amount controls that constitute the camera shake correction unit. Equipment and the like. That is, this imaging apparatus corrects camera shake by moving the imaging means to a desired position in a plane perpendicular to the optical axis, and includes a first displacement amount control device and a second displacement amount control. The two-dimensional displacement control by the apparatus is configured to be performed with higher accuracy by using a guide mechanism.
[0030]
The main part of the imaging device is constituted by a predetermined laminate and the two displacement amount control devices. The laminated body includes (1) a first plate body 21 in which two linear long grooves 26 and 27 are formed in parallel to each other and fixedly arranged at a predetermined position of the imaging device, and (2) two straight lines on the upper surface. The long plate-like long grooves 31 and 32 are formed in parallel with each other, and the projections 24 and 25 projecting to the lower surface side are provided at the corresponding positions of the long grooves 26 and 27, and (3) the projection 29 projecting to the lower surface side. A third plate 23 is provided by laminating 30 at positions corresponding to the long grooves 31 and 32 of the second plate 22.
[0031]
In the laminate, the long grooves 31 and 32 of the second plate body 22 are orthogonal to the long grooves 26 and 27 of the first plate body 21, and the protrusions 29 and 30 of the third plate body 23 are the long grooves 31 of the second plate body 22. , 32 so that the movement of these protrusions is linearly guided by the long groove, and the lower surface of the third plate body 23 is slidable with respect to the upper surface of the second plate body 22. Further, the protrusions 24 and 25 of the second plate 22 are inserted into the long grooves 26 and 27 of the first plate 21 so that the movement of these protrusions is linearly guided by the long grooves, and the second plate 22 The lower surface of the first plate member 21 is configured to slide relative to the upper surface of the first plate body 21.
[0032]
Further, the first displacement control device (not shown) is connected to the second plate body 22 via a connecting member similar to the connecting member 9a shown in FIG. An imaging means (not shown) is fixed to the upper surface of the third plate body 23, and the second displacement amount control device is connected to the imaging means or the third plate body 23 via a connection member similar to the connection member 9a. .
[0033]
In this imaging apparatus, when a predetermined voltage is applied to the piezoelectric element constituting the first displacement amount control device and the displacement amount control device is operated, the second plate body 22, the third plate body 23, the imaging means, The displacement amount control device 2 is guided by the long grooves 26 and 27 of the first plate 21 so as to integrally slide relative to the first plate 21 in the direction of X in FIG. . When the second displacement control device is activated, the imaging means and the third plate 23 are slid relative to the second plate 22 by a desired distance in the direction Y in FIG.
[0034]
【The invention's effect】
As is apparent from the above description, the present invention provides the following effects.
(1) Advantages of the Inventions of Claims 1 to 3 In the displacement control device comprising an electromechanical transducer such as a piezoelectric element according to the present invention, the member (etc.) to be displaced is not bonded to the leaf spring ( In other words, the member is not fixed), and since the member is always pressed against the leaf spring by a belt-like member made of a stretchable material, there is no “backlash” between the member and the leaf spring, The displacement of the leaf spring can be transmitted to the member with high accuracy, and the latter displacement amount is always equal to the former displacement amount.
[0035]
In particular, in the displacement amount control device according to claim 2, since the belt-like member is made of rubber or a thermoplastic elastomer, the accuracy of displacement amount control is further increased. Further, in the displacement amount control device according to the third aspect, since the bending curvature of the leaf spring in the free state is increased or decreased by the holding screw, the opposing gap between the belt-like member and the leaf spring can be adjusted, so that the diameter, It is possible to cope with various members having different thicknesses or thicknesses.
[0036]
(2) Advantages of the invention of the fourth aspect In the present invention, the displacement control device according to the first, second or third aspect is used to displace the image pickup means. Can be done. In particular, an image free from “image blur” can be stably obtained by adding a camera shake correction unit having a predetermined configuration. Therefore, it is possible to provide an imaging apparatus such as a digital camera having a stable image shake prevention function with a simple and small mechanism.
[0037]
(3) Since the effect imaging means according to the invention of claim 5 is displaced while being guided by the guide mechanism, the linearity of the imaging means displacement is further improved, and an imaging apparatus such as a digital camera having high image shake prevention accuracy Can be provided.
[0038]
(4) Since the effect image pickup means according to the inventions of claims 6 and 7 is made displaceable in the X direction and the Y direction, the camera shake is corrected by moving the image pickup means to a desired position in a plane perpendicular to the optical axis. Therefore, it is possible to provide an imaging apparatus such as a digital camera with high image blur prevention accuracy. Particularly in the seventh aspect of the invention, since the two-dimensional displacement amount control by the first displacement amount control device and the second displacement amount control device is performed using the guide mechanism, the displacement in the X direction and the Y direction is determined. Thus, it is possible to provide an imaging device such as a digital camera that further improves the linearity of the image and has extremely high image blur prevention accuracy.
[Brief description of the drawings]
FIG. 1 is a plan view showing a structure of a displacement control device according to a first embodiment of the present invention.
FIG. 2 is a schematic perspective view showing a main part structure of an imaging apparatus configured using the displacement amount control apparatus of FIG. 1 according to a second embodiment of the present invention.
3 is a block diagram illustrating a structure of a camera shake correction unit that configures the imaging apparatus of FIG. 2;
FIG. 4 is an exploded perspective view showing a main part structure of an imaging apparatus according to the third embodiment of the present invention and configured using the displacement amount control apparatus of FIG. 1;
FIG. 5 is an exploded perspective view showing a main part structure of an image pickup apparatus according to the fourth embodiment of the present invention and configured by using the displacement amount control apparatus of FIG. 1;
[Explanation of symbols]
1: Piezoelectric element 2: Presser plate 3: Presser plate 4: Plate spring 5: Plate spring 6: Presser screw (screw shaft)
7: Imaging device 8: Substrate 9a: Connecting member 9b: Locking piece 10: Strip member 11: Piezoelectric actuator 11-1: Displacement control device 12: Imaging means 15: First plate body 16, 17: Long groove 18: Second plate body 19, 20: Protrusion 21: First plate body 22: Second plate body 23: Third plate body 24, 25: Protrusion 26, 27: Long groove 29, 30: Protrusion 31, 32: Long groove

Claims (7)

電気機械変換手段と、この電気機械変換手段に固着された伸縮性材料からなる帯状部材とを備えた変位量制御装置であって、
前記電気機械変換手段では、電気機械変換素子の一側および、他側にそれぞれ押さえ板を設けてこれらの押さえ板同士を互いに対向させ、これらの押さえ板間に一対の板バネを湾曲状態で、かつ互いに対向させて架設するとともに、電気機械変換素子の伸縮により前記板バネの曲率増減に伴う変位を発生させるようにし、
前記帯状部材は、前記板バネの一方または双方の、電気機械変換素子よりも外側に向く面に、当該帯状部材の長手方向両端部を固着しており、
前記板バネと前記帯状部材との対向間隙に、連結部材により撮像手段と連結する係止片が挿入されており、当該係止片は、前記板バネ及び前記帯状部材に対して固着されていない状態で挟持されていることを特徴とする変位量制御装置。A displacement control device comprising an electromechanical conversion means and a belt-shaped member made of a stretchable material fixed to the electromechanical conversion means,
In the electromechanical conversion means, a pressing plate is provided on one side and the other side of the electromechanical conversion element so that these pressing plates face each other, and a pair of leaf springs are curved between these pressing plates, And it is constructed so as to oppose each other, and the displacement accompanying the increase / decrease in the curvature of the leaf spring is generated by expansion and contraction of the electromechanical conversion element,
The band-shaped member has one or both of the leaf springs fixed to both ends in the longitudinal direction of the band-shaped member on the surface facing the outside of the electromechanical transducer,
A locking piece that is connected to the imaging means by a connecting member is inserted into a facing gap between the leaf spring and the belt-like member, and the locking piece is not fixed to the leaf spring and the belt-like member. A displacement amount control device characterized by being held in a state . 前記帯状部材が、ゴムまたは熱可塑性エラストマーからなることを特徴とする請求項１に記載の変位量制御装置。  The displacement amount control device according to claim 1, wherein the belt-shaped member is made of rubber or a thermoplastic elastomer. 前記押さえ板の一方を電気機械変換素子の一端面に固着し、他方の押さえ板の中央部に押さえネジを貫通状態で螺合するとともに、前記押さえネジの一端部を電気機械変換素子の他端面に当接させたことを特徴とする請求項１または２に記載の変位量制御装置。  One end of the pressing plate is fixed to one end surface of the electromechanical conversion element, and a pressing screw is screwed into the center portion of the other pressing plate in a penetrating state, and the one end portion of the pressing screw is connected to the other end surface of the electromechanical conversion element. The displacement amount control device according to claim 1, wherein the displacement amount control device is abutted against the displacement amount control device. 撮像光学系と、これを通過した被写体像を受光して画像信号に変換する撮像手段を有する撮像装置であり、当該撮像装置の所定位置に固定配備された請求項１，２または３に係る変位量制御装置と、先端を係止片とした連結部材を有する撮像手段とを備えたものであって、
前記変位量制御装置の帯状部材と板バネとの対向間隙に前記連結部材の係止片を挿入して該係止片を帯状部材と板バネとで挟持し、電源装置から所要の電圧を前記電気機械変換素子に印加するようにしたことを特徴とする撮像装置。A displacement according to claim 1, 2 or 3, comprising an imaging optical system and an imaging means for receiving a subject image that has passed through the imaging optical system and converting the received image into an image signal. Comprising a quantity control device and an imaging means having a connecting member having a tip as a locking piece,
A locking piece of the connecting member is inserted into a gap between the belt-like member and the leaf spring of the displacement amount control device, the latching piece is sandwiched between the belt-like member and the leaf spring, and a required voltage is supplied from the power supply device. An imaging apparatus characterized by being applied to an electromechanical transducer. 上面に１本の直線状長溝が形成されているか、または上面に２本以上の直線状長溝が互いに平行に形成され、当該撮像装置の所定位置に固定配備された第１の板体および、下面側に突出する突起が前記長溝の対応位置に設けられた第２の板体を積層して構成された積層体と、変位量制御装置と、第２の板体の上面に固着された撮像手段とを備えてなる撮像装置であって、
前記積層体では、第２の板体の突起が第１の板体の長溝に挿入され、これらの突起の移動が前記長溝で直線的に案内されるように、かつ第２の板体の下面が第１の板体の上面に対し摺動しうるように構成され、
第２の板体または前記撮像手段は、前記連結部材を介して変位量制御装置に連結され、
前記変位量制御装置が作動したときに、第２の板体および撮像手段が、前記長溝に案内されることにより一体的に、かつ直線的に所望距離だけ移動自在となっていることを特徴とする請求項４に記載の撮像装置。One straight long groove formed on the upper surface, or two or more linear long grooves formed on the upper surface in parallel with each other, and a first plate body fixedly arranged at a predetermined position of the imaging device, and the lower surface Laminate formed by laminating a second plate having protrusions projecting to the side corresponding to the long groove, a displacement control device, and imaging means fixed to the upper surface of the second plate An imaging device comprising:
In the laminate, the protrusions of the second plate are inserted into the long grooves of the first plate, and the movement of these protrusions is linearly guided by the long grooves, and the lower surface of the second plate Is configured to be slidable with respect to the upper surface of the first plate body,
The second plate or the imaging means is connected to the displacement amount control device via the connecting member,
When the displacement amount control device is activated, the second plate body and the imaging means are movable by a desired distance integrally and linearly by being guided by the long groove. The imaging device according to claim 4. 撮像光学系と、これを通過した被写体像を受光して画像信号に変換する撮像手段とを有する撮像装置であって、
当該撮像装置の所定位置に固定配備された請求項１，２または３に係る第１の変位量制御装置と、この第１の変位量制御装置に接続された接続部材と、この接続部材に接続された請求項１，２または３に係る第２の変位量制御装置と、この第２の変位量制御装置に接続された撮像手段とを備えてなり、
第１の変位量制御装置の電気機械変換素子に電源装置から所要の電圧を印加することにより、前記撮像手段と第２の変位量制御装置とを、一体的にＸ方向に所望距離だけ移動自在とし、
第２の変位量制御装置の電気機械変換素子に電源装置から所要の電圧を印加することにより、前記撮像手段をＹ方向に所望距離だけ移動自在としたことを特徴とする撮像装置。An imaging apparatus having an imaging optical system and imaging means for receiving a subject image that has passed through the imaging optical system and converting it into an image signal,
The first displacement amount control device according to claim 1, 2 or 3 fixedly arranged at a predetermined position of the imaging device, a connection member connected to the first displacement amount control device, and a connection to the connection member A second displacement amount control device according to claim 1, 2 or 3, and an imaging means connected to the second displacement amount control device,
By applying a required voltage from the power supply device to the electromechanical conversion element of the first displacement amount control device, the imaging means and the second displacement amount control device can be integrally moved by a desired distance in the X direction. age,
An imaging apparatus characterized in that the imaging means is movable by a desired distance in the Y direction by applying a required voltage from a power supply device to the electromechanical conversion element of the second displacement control device. 上面に１本の直線状長溝が形成されているか、または上面に２本以上の直線状長溝が互いに平行に形成され、当該撮像装置の所定位置に固定配備された第１板体、上面に１本の直線状長溝が形成されているか、または上面に２本以上の直線状長溝が互いに平行に形成され、下面側に突出する突起が前記第１板体の長溝の対応位置に設けられた第２板体および、下面側に突出する突起が前記第２板体の長溝の対応位置に設けられた第３板体を積層して構成された積層体と、
第２板体に前記連結部材を介して連結された第１の変位量制御装置と、第３板体の上面に固着された撮像手段と、第３板体または前記撮像手段に前記連結部材を介して連結された第２の変位量制御装置とを備えてなる撮像装置であって、
前記積層体では、
第２板体の長溝が、第１板体の長溝に直交し、第３板体の突起が第２板体の長溝に挿入され、これらの突起の移動が前記長溝で直線的に案内されるように、かつ第３板体の下面が第２板体の上面に対し摺動しうるように構成され、第２板体の突起が第１板体の長溝に挿入され、これらの突起の移動が前記長溝で直線的に案内されるように、かつ第２板体の下面が第１板体の上面に対し摺動しうるように構成され、
第１の変位量制御装置が作動したときに、第２板体、第３板体および撮像手段が、第１板体の長溝によって案内されることにより一体的にＸ方向に移動し、
第２の変位量制御装置が作動したときに、第３板体および撮像手段が、第２板体の長溝に案内されることにより一体的にＹ方向に移動するように構成されていることを特徴とする請求項６に記載の撮像装置。One straight long groove is formed on the upper surface, or two or more linear long grooves are formed on the upper surface in parallel with each other, and the first plate is fixedly arranged at a predetermined position of the imaging device. A plurality of linear long grooves are formed on the upper surface, and two or more linear long grooves are formed in parallel with each other, and a protrusion protruding on the lower surface side is provided at a position corresponding to the long groove of the first plate body. A laminated body constituted by laminating a second plate body and a third plate body provided with protrusions projecting on the lower surface side at corresponding positions of the long grooves of the second plate body;
A first displacement control device connected to the second plate via the connecting member; an imaging means fixed to the upper surface of the third plate; and the connecting member on the third plate or the imaging means. An imaging device comprising a second displacement amount control device coupled via
In the laminate,
The long groove of the second plate body is orthogonal to the long groove of the first plate body, the protrusions of the third plate body are inserted into the long grooves of the second plate body, and the movement of these protrusions is linearly guided by the long grooves. And the lower surface of the third plate is slidable with respect to the upper surface of the second plate, and the projections of the second plate are inserted into the long grooves of the first plate, and the movement of these projections Is configured to be linearly guided by the long groove, and so that the lower surface of the second plate can slide relative to the upper surface of the first plate,
When the first displacement control device is activated, the second plate body, the third plate body and the imaging means are integrally moved in the X direction by being guided by the long groove of the first plate body,
When the second displacement control device is activated, the third plate and the imaging means are configured to move integrally in the Y direction by being guided by the long groove of the second plate. The imaging apparatus according to claim 6.

Images