JP4446795B2 - Imaging unit support device in electronic camera - Google Patents

Imaging unit support device in electronic camera Download PDF

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JP4446795B2
JP4446795B2 JP2004144593A JP2004144593A JP4446795B2 JP 4446795 B2 JP4446795 B2 JP 4446795B2 JP 2004144593 A JP2004144593 A JP 2004144593A JP 2004144593 A JP2004144593 A JP 2004144593A JP 4446795 B2 JP4446795 B2 JP 4446795B2
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imaging unit
holding member
support device
imaging
drive
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JP2005328337A (en
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修三 瀬尾
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Hoya Corp
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Description

本発明は、電子カメラ内部に備えられる撮像ユニットを支持する装置に関する。   The present invention relates to an apparatus for supporting an imaging unit provided in an electronic camera.

カメラによる被写体の撮影において、斜めの角度の被写体全景を鮮鋭に描写したり、誇張されすぎている遠近感を修正したりする目的でアオリ撮影が行われる。このようなアオリ撮影を行う為にフィルムあるいは撮像素子を前後左右への傾斜させる大きな装置が必要で、一般のカメラには適用できなかった。   When shooting a subject with a camera, a tilt shot is performed for the purpose of sharply depicting the entire view of the subject at an oblique angle or correcting the perspective that is too exaggerated. In order to perform such tilt photography, a large apparatus for tilting the film or the image sensor to the front, back, left and right is necessary, and it cannot be applied to a general camera.

ところで、撮像素子を圧電素子やバイモルフにより保持し、複数の圧電素子を伸縮することにより撮像素子を傾けることが開示されている（特許文献１参照）。このような構成であれば結像部を傾斜させる装置を小型化することが可能である。ここで、カメラ本体に撮像素子を保持させるためにカメラ本体および撮像素子の両方に複数の圧電素子を固着させる構成が考えられる。しかし、このような構成では一般に積層構造である圧電素子の寿命を長期化することが難しく、通常のカメラに適用することが難しかった。   By the way, it is disclosed that the image pickup element is tilted by holding the image pickup element by a piezoelectric element or a bimorph and expanding and contracting a plurality of piezoelectric elements (see Patent Document 1). With such a configuration, it is possible to reduce the size of the device that tilts the imaging unit. Here, in order to hold the image sensor in the camera body, a configuration in which a plurality of piezoelectric elements are fixed to both the camera body and the image sensor is conceivable. However, with such a configuration, it is generally difficult to extend the life of a piezoelectric element having a laminated structure, and it is difficult to apply it to a normal camera.

なぜならば、撮像素子を傾けるために、ひとつの圧電素子を他の圧電素子より伸張または収縮させると、固着されている撮像素子を介して他の圧電素子の固着部分を傾かせるような力が加わるためである。すなわち、図１２に示すように撮像素子３３に固着させた圧電素子５０の積層の界面に対し一部は圧縮する力（符号Ｐ）がかかり、別の一部には逆方向に引張る力（符号Ｅ）がかかることにより界面の剥離が生じやすい。
特開平８−１６７０８号公報 This is because when one piezoelectric element is expanded or contracted relative to another piezoelectric element in order to tilt the image sensor, a force is applied to tilt the fixed portion of the other piezoelectric element via the fixed image sensor. Because. That is, as shown in FIG. 12, a part of the interface of the stacked layers of the piezoelectric elements 50 fixed to the image sensor 33 is subjected to a compressing force (symbol P), and another part is subjected to a tensile force (symbol P). E) is likely to cause peeling of the interface.
JP-A-8-16708

したがって、本発明では圧電素子の寿命を長期化させる撮像素子支持装置の提供を目的とする。   Accordingly, an object of the present invention is to provide an image sensor support device that extends the life of a piezoelectric element.

本発明の撮像ユニット支持装置は撮像素子を備えた撮像ユニットと、撮像ユニットと対向する保持部材と、撮像ユニットと保持部材との間に設けられ一端が撮像ユニットあるいは保持部材の一方において固着され他端が他方において当接し撮像ユニットと保持部材の間で伸縮自在な圧電素子を有する駆動部材と、撮像ユニットと保持部材を連結し駆動部材と当接する撮像ユニットあるいは保持部材を駆動部材に押圧させる方向に付勢する弾性部材とを備えることを特徴としている。   An image pickup unit support device of the present invention is provided between an image pickup unit including an image pickup element, a holding member facing the image pickup unit, an image pickup unit and a holding member, and one end is fixed to one of the image pickup unit and the holding member. A driving member having a piezoelectric element whose end abuts on the other side and can be expanded and contracted between the imaging unit and the holding member, and a direction in which the imaging unit and the holding member are connected to each other and pressed against the driving member. And an elastic member that biases the lens.

駆動部材が３以上の箇所に設けられ、３以上の箇所を直線で結ぶことにより形成される図形の重心が撮像素子に被写体像を結像させる光学系の光軸に重なるように配置されることが好ましい。また駆動部材が撮像素子に被写体像を結像させる光学系の光軸の近傍に配置されることが好ましい。   The drive member is provided at three or more locations, and the center of gravity of the figure formed by connecting the three or more locations with a straight line is disposed so as to overlap the optical axis of the optical system that forms the subject image on the image sensor. Is preferred. Further, it is preferable that the driving member is disposed in the vicinity of the optical axis of the optical system that forms a subject image on the image sensor.

撮像ユニットあるいは保持部材に当接する駆動部材の先端が凸球面状であることが好ましく、撮像ユニットあるいは保持部材において駆動部材と当接する箇所に凹陥部が形成され、駆動部材の先端が凹陥部に係合するが好ましい。さらに凹陥部は円錐状であることが好ましい。   It is preferable that the tip of the drive member that contacts the imaging unit or the holding member has a convex spherical shape, and a recess is formed at a position where the imaging unit or the holding member contacts the drive member, and the tip of the drive member is related to the recess. Are preferred. Furthermore, it is preferable that the recess is conical.

駆動部材の一端に雄螺子が形成され、撮像ユニットあるいは保持部材に雌螺子が形成され、駆動部材を撮像ユニットあるいは保持部材に螺合して固着することが好ましい。また撮像ユニットを構成する撮像素子と撮像素子と電気的に接続される基板との間に挟まれる板部材に弾性部材を連結させることが好ましい。   It is preferable that a male screw is formed at one end of the driving member, a female screw is formed at the imaging unit or the holding member, and the driving member is screwed and fixed to the imaging unit or the holding member. In addition, it is preferable that the elastic member is coupled to a plate member that is sandwiched between an imaging element constituting the imaging unit and a substrate that is electrically connected to the imaging element.

駆動部材の先端に凹陥部が形成され、撮像ユニットあるいは保持部材において駆動部材と当接する箇所に突起が形成され、突起が凹陥部に係合することが好ましい。   It is preferable that a recess is formed at the tip of the drive member, a protrusion is formed at a position where the image pickup unit or the holding member contacts the drive member, and the protrusion engages with the recess.

保持部材に先端が凸球面状である基準部材が設けられ、撮像ユニットの保持部材と対向する面において光軸と重なる箇所に円錐状の凹陥部を備え、基準部材の先端が凹陥部に係合することが好ましい。   The holding member is provided with a reference member whose tip is a convex spherical shape, and a conical recess is provided at a position overlapping the optical axis on the surface facing the holding member of the imaging unit, and the tip of the reference member is engaged with the recess. It is preferable to do.

駆動部材がピンとピンの先端に離脱防止部とを備え、ピンが撮像ユニットあるいは保持部材に設けられた孔を挿通して、撮像ユニットと保持部材の相対する面の裏側の背面において離脱防止部が撮像ユニットあるいは保持部材と当接して、撮像ユニットあるいは保持部材から駆動部材の離脱を防止することが好ましい。さらにピンに雄螺子が形成され、離脱防止部に雌螺子が形成され、ピンを離脱防止部に螺着して連結することが好ましい。   The drive member includes a pin and a separation preventing portion at the tip of the pin, and the pin is inserted through a hole provided in the imaging unit or the holding member, and the separation preventing portion is provided on the back side of the opposite side of the imaging unit and the holding member. It is preferable to prevent the drive member from coming off from the imaging unit or the holding member by contacting the imaging unit or the holding member. Further, it is preferable that a male screw is formed on the pin, a female screw is formed on the separation preventing portion, and the pin is screwed to the separation preventing portion and connected.

本発明の電子カメラは、撮像素子を備えた撮像ユニットと、撮像ユニットと対向する保持部材と、撮像ユニットと保持部材との間に設けられ一端が撮像ユニットあるいは保持部材の一方において固着され他端が他方において当接し撮像ユニットと保持部材の間で伸縮自在な圧電素子を有する駆動部材と、撮像ユニットと保持部材を連結し駆動部材と当接する撮像ユニットあるいは保持部材を駆動部材に押圧させる方向に付勢する弾性部材とを備えることを特徴としている。   An electronic camera of the present invention is provided with an imaging unit including an imaging device, a holding member facing the imaging unit, an imaging unit and a holding member, and one end fixed to one of the imaging unit and the holding member. A driving member having a piezoelectric element that abuts on the other side and that can expand and contract between the imaging unit and the holding member, and connects the imaging unit and the holding member and presses the driving unit against the imaging unit or the holding member that contacts the driving member. And an urging elastic member.

本発明によれば撮像素子支持装置に用いる圧電素子の寿命を長期化させ、傾き調整機能を通常のカメラにも適用することが可能となる。   According to the present invention, the lifetime of the piezoelectric element used in the image sensor support device can be extended, and the tilt adjustment function can be applied to a normal camera.

以下、本発明の実施形態を図面を参照して説明する。
図１は、本発明の第１の実施形態である撮像ユニット支持装置の概略を示した電子カメラを上側から見た内部配置図である。図２は撮像ユニット支持装置の図１におけるII−II線に沿う断面図である。図３は撮像ユニット支持装置の図２におけるIII−III線に沿う断面図である。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an internal arrangement view of an electronic camera showing an outline of an imaging unit support device according to a first embodiment of the present invention as viewed from above. FIG. 2 is a cross-sectional view of the imaging unit support device taken along line II-II in FIG. FIG. 3 is a cross-sectional view of the imaging unit support device taken along line III-III in FIG.

電子カメラ１０には、撮影光学系２０、撮像ユニット支持装置３０、およびシャッターボタン（図示せず）が備えられる。撮像ユニット支持装置３０は撮像ユニット３１、ユニット保持部材３２によって構成される。ユニット保持部材３２は電子カメラ１０の背面１１近傍に取付けられる。撮像ユニット３１はユニット保持部材３２に保持され、撮影光学系２０側に位置する。   The electronic camera 10 includes a photographic optical system 20, an imaging unit support device 30, and a shutter button (not shown). The imaging unit support device 30 includes an imaging unit 31 and a unit holding member 32. The unit holding member 32 is attached near the back surface 11 of the electronic camera 10. The imaging unit 31 is held by the unit holding member 32 and is located on the imaging optical system 20 side.

撮像ユニット３１は撮像素子３３、金属製の放熱用の短形板部材であるベース３４、基板３５により構成される。ベース３４は撮像素子３３と基板３５とに挟まれる。撮像素子３３と基板３５は導体リード３６により電気的に接続される。撮像ユニット３１は、撮像素子３３が撮影光学系２０と相対するように保持され、撮影光学系２０を通過した被写体光は撮像素子３３に導かれる。なお、撮像素子３３は撮影光学系２０と対向する面側において光学ローパスフィルタ（図示せず）や保護ガラス（図示せず）により覆われる。   The imaging unit 31 includes an imaging element 33, a base 34 that is a metal-made short plate member for heat dissipation, and a substrate 35. The base 34 is sandwiched between the image sensor 33 and the substrate 35. The image sensor 33 and the substrate 35 are electrically connected by a conductor lead 36. The imaging unit 31 is held so that the imaging element 33 faces the imaging optical system 20, and subject light that has passed through the imaging optical system 20 is guided to the imaging element 33. Note that the image sensor 33 is covered with an optical low-pass filter (not shown) or a protective glass (not shown) on the side facing the imaging optical system 20.

シャッターボタンは２段階のスイッチとなっており、半押しで測光スイッチがＯＮとなり、全押しでレリーズスイッチがＯＮとなる。レリーズスイッチはＣＰＵ（図示せず）を介して撮像素子３３に接続される。レリーズスイッチがＯＮとなると撮影動作が実行され撮像素子３３上に結像された被写体像が受光される。   The shutter button is a two-stage switch. When the shutter button is pressed halfway, the photometry switch is turned ON, and when the shutter button is fully pressed, the release switch is turned ON. The release switch is connected to the image sensor 33 via a CPU (not shown). When the release switch is turned on, a photographing operation is executed and a subject image formed on the image sensor 33 is received.

撮像ユニット３１とユニット保持部材３２とは互いに対向しており、弾性部材である付勢バネ３７により連結される。撮像ユニット３１とユニット保持部材３２の間に撮像ユニット３１を駆動する駆動部材３８ａ、３８ｂ、３８ｃが設けられる。駆動部材３８ａ、３８ｂ、３８ｃは一端に雄螺子３９が形成され、他端は凸球面状に成形される。   The imaging unit 31 and the unit holding member 32 face each other and are connected by a biasing spring 37 that is an elastic member. Drive members 38 a, 38 b, and 38 c that drive the imaging unit 31 are provided between the imaging unit 31 and the unit holding member 32. The driving members 38a, 38b, and 38c are formed with a male screw 39 at one end and a convex spherical shape at the other end.

図４は撮像ユニット３１を基板３５側から見て駆動部材３８ａ、３８ｂ、３８ｃが当接する箇所を示す図である。基板３５には駆動部材３８ａ、３８ｂ、３８ｃを配置する箇所に孔４１が形成され、駆動部材３８ａ、３８ｂ、３８ｃの凸球面状の先端がベース３４に当接する。すなわち、駆動部材３８ａ、３８ｂ、３８ｃは撮像ユニット３１におけるユニット保持部材３２と相対する面において当接する。   FIG. 4 is a diagram showing the locations where the driving members 38a, 38b, and 38c come into contact when the imaging unit 31 is viewed from the substrate 35 side. Holes 41 are formed in the substrate 35 at locations where the drive members 38a, 38b, and 38c are disposed, and the convex spherical tips of the drive members 38a, 38b, and 38c abut against the base 34. That is, the drive members 38a, 38b, and 38c abut on the surface of the imaging unit 31 that faces the unit holding member 32.

ベース３４には、円錐状の第１の凹陥部４２ａ、第２の凹陥部４２ｂ，および第３の凹陥部４２ｃが形成される。第１の駆動部材３８ａ、第２の駆動部材３８ｂ、および第３の駆動部材３８ｃはそれぞれ第１の凹陥部４２ａ、第２の凹陥部４２ｂ，および第３の凹陥部４２ｃにおいてベース３４と当接する。   The base 34 is formed with a conical first concave portion 42a, a second concave portion 42b, and a third concave portion 42c. The first drive member 38a, the second drive member 38b, and the third drive member 38c are in contact with the base 34 at the first recess 42a, the second recess 42b, and the third recess 42c, respectively. .

駆動部材３８ａ、３８ｂ、３８ｃは、撮像素子３３に被写体像を結像させる撮影光学系２０の光軸Ｃの近傍３箇所に備えられる。光軸Ｃに対して、第１の駆動部材３８ａは左上に、第２の駆動部材３８ｂは右上に、第３の駆動部材３８ｃは下側の箇所に配置され、その３箇所を直線で結ぶことにより形成される３角形の重心が光軸Ｃに重なるように定められる。   The drive members 38a, 38b, and 38c are provided at three locations in the vicinity of the optical axis C of the photographing optical system 20 that forms a subject image on the image sensor 33. With respect to the optical axis C, the first driving member 38a is arranged at the upper left, the second driving member 38b is arranged at the upper right, and the third driving member 38c is arranged at the lower part, and the three parts are connected by a straight line. The center of gravity of the triangle formed by

図２、図３に示すように、ユニット保持部材３２には駆動部材３８ａ、３８ｂ、３８ｃを配置する箇所において雌螺子４０が形成される。駆動部材３８ａ、３８ｂ、３８ｃに形成した雄螺子３９を雌螺子４０に螺着して連結することにより、駆動部材３８ａ、３８ｂ、３８ｃはユニット保持部材３２に固着される。螺着して連結する構成によれば、螺着する量を調節することにより撮像ユニット３１とユニット保持部材３２の間隔を容易に微調整できる。   As shown in FIGS. 2 and 3, the female screw 40 is formed in the unit holding member 32 at a position where the driving members 38 a, 38 b, and 38 c are disposed. The drive members 38a, 38b, and 38c are fixed to the unit holding member 32 by screwing and connecting the male screw 39 formed on the drive members 38a, 38b, and 38c to the female screw 40. According to the configuration of being screwed and connected, the interval between the imaging unit 31 and the unit holding member 32 can be easily finely adjusted by adjusting the amount of screwing.

駆動部材３８ａ、３８ｂ，３８ｃの先端を凹陥部４２ａ、４２ｂ，４２ｃにそれぞれ係合させる。駆動部材３８ａ、３８ｂ，３８ｃの先端を凹陥部４２ａ、４２ｂ，４２ｃに係合させることにより、被写体像の結像位置から撮像素子３３がずれることを防ぐことが可能である。また、凹陥部４２ａ、４２ｂ，４２ｃを円錐状とすることによりさらに位置ズレ防止性は高められる。また、駆動部材３８ａ、３８ｂ、３８ｃを配置する１箇所のみに凹陥部を設ける構成でも同様の効果を得られる。   The front ends of the drive members 38a, 38b, and 38c are engaged with the recessed portions 42a, 42b, and 42c, respectively. By engaging the leading ends of the drive members 38a, 38b, and 38c with the recessed portions 42a, 42b, and 42c, it is possible to prevent the image sensor 33 from being displaced from the imaging position of the subject image. Further, by making the concave portions 42a, 42b, 42c conical, the misalignment prevention can be further enhanced. Further, the same effect can be obtained even in a configuration in which the recessed portion is provided only at one place where the driving members 38a, 38b, and 38c are disposed.

付勢バネ３７はベース３４の４隅に取付けられ、撮像ユニット３１とユニット保持部材３２を引張ることにより、駆動部材３８ａ、３８ｂ、３８ｃに当接する撮像ユニット３１におけるベース３４を駆動部材３８ａ、３８ｂ、３８ｃに押圧させる方向に付勢する。駆動部材３８ａ、３８ｂ、３８ｃは圧電素子を有し、撮像ユニット３１とユニット保持部材３２の間で伸縮自在である。   The urging springs 37 are attached to the four corners of the base 34, and by pulling the imaging unit 31 and the unit holding member 32, the base 34 in the imaging unit 31 that contacts the driving members 38a, 38b, 38c is moved to the driving members 38a, 38b, The urging force is applied in the direction of pressing by 38c. The drive members 38 a, 38 b, and 38 c have piezoelectric elements and can be expanded and contracted between the imaging unit 31 and the unit holding member 32.

以上のような構成において、各駆動部材３８ａ、３８ｂ、３８ｃを伸縮させることにより撮像ユニット３１の傾きなどを調節できる。すなわち、図５に示すように、全ての駆動部材３８ａ、３８ｂ，３８ｃを同じ量で伸縮させ撮像ユニット３１とユニット保持部材３２の間隔の調節ができる。あるいは図６、図７に示すように、各駆動部材３８ａ、３８ｂ，３８ｃの伸縮量を制御して撮像ユニット３１の前後左右の傾きを調節可能である。例えば、撮像ユニット３１を下側に傾けるときは、第１および第２の駆動部材３８ａ、３８ｂを伸ばし、第３の駆動部材３８ｃを縮めればよい。   In the configuration as described above, the inclination of the imaging unit 31 can be adjusted by extending or contracting each of the driving members 38a, 38b, and 38c. That is, as shown in FIG. 5, all the drive members 38a, 38b, and 38c can be expanded and contracted by the same amount to adjust the distance between the imaging unit 31 and the unit holding member 32. Alternatively, as shown in FIGS. 6 and 7, the front / rear / left / right inclination of the imaging unit 31 can be adjusted by controlling the amount of expansion / contraction of each drive member 38 a, 38 b, 38 c. For example, when the imaging unit 31 is tilted downward, the first and second drive members 38a and 38b may be extended and the third drive member 38c may be contracted.

ここで図８に示すように、駆動部材３８と撮像ユニット３１のベース３４は固着されておらず摺接する。すなわち、駆動部材３８に対してベース３４が垂直であるときの摺接部分Ｔ’は駆動部材３８の軸心に同心的であるが、ベース３４が傾くと、摺接部分Ｔは軸心に対して傾く。したがって、駆動部材３８を固着させた場合に生じる圧電素子５０の界面における一方の側辺に生ずる圧縮力および他方の側辺に生ずる引張力（図１２参照）は本実施形態においては発生せず、ばねにより付勢されて生ずる圧縮力のみが発生する。すなわち積層の界面を剥離する力がかからないため、圧電素子５０の積層の剥離は生じにくい。また剥離させる力がかからないので撮像ユニット３１を駆動するエネルギーをその分低減させることが可能となる。   Here, as shown in FIG. 8, the drive member 38 and the base 34 of the imaging unit 31 are not fixed and are in sliding contact. That is, the slidable contact portion T ′ when the base 34 is perpendicular to the drive member 38 is concentric with the axis of the drive member 38, but when the base 34 is tilted, the slidable contact portion T is relative to the axis. Lean. Therefore, the compressive force generated on one side of the interface of the piezoelectric element 50 and the tensile force generated on the other side (see FIG. 12) generated when the driving member 38 is fixed are not generated in this embodiment. Only the compression force generated by the spring is generated. That is, since no force is applied to peel off the interface between the layers, the piezoelectric element 50 is hardly peeled off. Further, since no peeling force is applied, the energy for driving the imaging unit 31 can be reduced accordingly.

本実施形態において、凹陥部４２を球面状に成形した構成としてもよい。凹陥部４２が円錐状である場合、凹陥部４２と駆動部材３８の当接する部分が円である一方、凹陥部４２が球面状である場合、凹陥部４２と駆動部材３８の当接する部分は点となる。したがって、撮像ユニット３１を傾ける場合に当接する部分が滑りやすく撮像ユニット３１の駆動が容易である。また、凹陥部４２は曲面であってもよい。   In the present embodiment, the recess 42 may be formed into a spherical shape. When the recessed portion 42 is conical, the contact portion between the recessed portion 42 and the drive member 38 is a circle, whereas when the recessed portion 42 is spherical, the contact portion between the recessed portion 42 and the drive member 38 is a point. It becomes. Therefore, when the image pickup unit 31 is tilted, the portion that comes into contact is slippery and the drive of the image pickup unit 31 is easy. The recessed portion 42 may be a curved surface.

なお、第１の凹陥部４２ａ、および第２の凹陥部４２ｂを球面状に成形してもよい。この場合、位置ズレを第３の凹陥部４２ｃと第３の駆動部材３８ｃの係合により防止し、第１の駆動部材３８ａ、および第２の駆動部材３８ｂにおける当接する部分を滑りやすい構成とすることが可能である。また、第３の凹陥部４２ｃにのみ第３の駆動部材３８ｃを係合させ、第１の駆動部材３８ａ、および第２の駆動部材３８ｂの凸球面状の先端を、凹陥部を設けることなく直接ベース３４に当接する構成であってもよい。   In addition, you may shape | mold the 1st recessed part 42a and the 2nd recessed part 42b in spherical shape. In this case, misalignment is prevented by the engagement of the third recessed portion 42c and the third drive member 38c, and the contacting portions of the first drive member 38a and the second drive member 38b are configured to be slippery. It is possible. Further, the third drive member 38c is engaged only with the third recessed portion 42c, and the convex spherical tip ends of the first drive member 38a and the second drive member 38b are directly connected without providing the recessed portion. The structure which contacts the base 34 may be sufficient.

３箇所に配置する駆動部材３８ａ、３８ｂ、３８ｃは互いに近付け、光軸Ｃの近傍とすることが好ましい。このような構成によれば駆動部材３８ａ、３８ｂ、３８ｃを遠ざけた構成に比べて、駆動部材３８ａ、３８ｂ、３８ｃの同じ伸縮量に対する傾きは大きくなる。すなわち、傾きの調整範囲が大きくなる。また、駆動部材３８ａ、３８ｂ、３８ｃは４以上の箇所に設ける構成にしてもよい。   It is preferable that the drive members 38a, 38b, and 38c disposed at the three positions be close to each other and near the optical axis C. According to such a structure, the inclination with respect to the same expansion-contraction amount of the drive members 38a, 38b, and 38c becomes large compared with the structure where the drive members 38a, 38b, and 38c are moved away. That is, the tilt adjustment range is increased. The drive members 38a, 38b, and 38c may be provided at four or more locations.

また、本実施形態ではベース３４に付勢バネ３７を取付けたが、撮像ユニット３１を構成する他の部材に取付けても同様の効果を得られる。付勢バネ３７を取付ける部材は強度や大きさなどを考慮して定められる。また、本実施形態では付勢バネ３７をベース３４の４隅に取付けたが、１直線上に並ばない３箇所以上に配置してもよい。   In the present embodiment, the urging spring 37 is attached to the base 34. However, the same effect can be obtained by attaching the urging spring 37 to another member constituting the imaging unit 31. A member to which the urging spring 37 is attached is determined in consideration of strength and size. In this embodiment, the urging springs 37 are attached to the four corners of the base 34. However, the urging springs 37 may be arranged at three or more locations that do not line up on one straight line.

また、撮像ユニット３１と当接する駆動部材３８ａ、３８ｂ、３８ｃの先端に凹陥部を形成し、撮像ユニット３１に突起を形成して、突起を凹陥部に係合させる構成にしてもよい。駆動部材３８ａ、３８ｂ、３８ｃの先端に形成した凹陥部は球面状あるいは円錐状であってもよい。さらに撮像ユニット３１に形成した突起の先端は凸球面状に成形してもよい。   Further, a configuration may be adopted in which a recessed portion is formed at the tip of the drive members 38a, 38b, and 38c that are in contact with the imaging unit 31, and a protrusion is formed on the imaging unit 31, and the protrusion is engaged with the recessed portion. The recessed portion formed at the tip of the drive members 38a, 38b, 38c may be spherical or conical. Further, the tip of the protrusion formed on the imaging unit 31 may be formed into a convex spherical shape.

また、本実施形態では駆動部材３８ａ、３８ｂ、３８ｃをユニット保持部材３２に固着して、撮像ユニット３１に当接させる構成であるが、撮像ユニット３１に固着して、ユニット保持部材３２に当接させる構成でも同様の効果を得られる。   In the present embodiment, the drive members 38a, 38b, and 38c are fixed to the unit holding member 32 and are brought into contact with the imaging unit 31, but are fixed to the imaging unit 31 and are brought into contact with the unit holding member 32. The same effect can be obtained with the configuration.

図９、図１０に本発明の第２の実施形態である撮像ユニット支持装置３０を示す。本実施形態においては、基準ピン４３がユニット保持部材３２に固着され、基準ピン４３とベース３４が当接する。基準ピン４３においてユニット保持部材３２に固着される一端は雄螺子４５が形成され、撮像ユニット３１と当接する他端は凸球面状に成形される。   9 and 10 show an imaging unit support device 30 according to the second embodiment of the present invention. In the present embodiment, the reference pin 43 is fixed to the unit holding member 32, and the reference pin 43 and the base 34 come into contact with each other. One end of the reference pin 43 fixed to the unit holding member 32 is formed with a male screw 45, and the other end in contact with the imaging unit 31 is formed into a convex spherical shape.

基準ピン４３は、撮影光学系２０の光軸の中心Ｃと重なる位置においてベース３４と当接する。ベース３４における基準ピン４３と当接する箇所には円錐状の凹陥部４４が設けられ、基準ピン４３の先端が凹陥部４４に係合する。駆動部材３８ａ、３８ｂ、３８ｃと係合する凹陥部４２ａ、４２ｂ、４２ｃは球面状に成形される。雄螺子４５とユニット保持部材３２に形成した雌螺子４６を螺着して、基準ピン４３はユニット保持部材３２に固着される。したがって、基準ピン４３の高さ調整も容易に行える。他の構成は第１の実施形態と同様である。   The reference pin 43 contacts the base 34 at a position overlapping the center C of the optical axis of the photographing optical system 20. A conical recessed portion 44 is provided at a location where the base 34 contacts the reference pin 43, and the tip of the reference pin 43 engages with the recessed portion 44. The recessed portions 42a, 42b, 42c that engage with the driving members 38a, 38b, 38c are formed into a spherical shape. The reference pin 43 is fixed to the unit holding member 32 by screwing the male screw 45 and the female screw 46 formed on the unit holding member 32. Therefore, the height of the reference pin 43 can be easily adjusted. Other configurations are the same as those of the first embodiment.

本実施形態によれば、基準ピン４３により被写体像の結像位置から撮像素子３３がずれることを防ぐことが可能である。したがって、基準ピン４３により位置ズレが防止可能であるので、駆動部材３８ａ、３８ｂ、３８ｃと係合する凹陥部４２ａ、４２ｂ、４２ｃは球面状にして駆動部材３８ａ、３８ｂ、３８ｃにおける当接する部分を滑りやすくすることができる。なお、凹陥部を成形せず、ベース３４と駆動部材３８ａ、３８ｂ、３８ｃが当接する構成であっても、同様の効果を得られる。   According to the present embodiment, it is possible to prevent the image sensor 33 from being displaced from the imaging position of the subject image by the reference pin 43. Therefore, since the positional deviation can be prevented by the reference pin 43, the recessed portions 42a, 42b, 42c that engage with the drive members 38a, 38b, 38c are formed in a spherical shape so that the contact portions of the drive members 38a, 38b, 38c are in contact with each other. Can be slippery. The same effect can be obtained even when the base 34 and the drive members 38a, 38b, and 38c are in contact with each other without forming the recessed portion.

図１１に本発明の第３の実施形態である撮像ユニット支持装置３０を示す。本実施形態において、駆動部材３８ａ、３８ｂ、３８ｃが撮像ユニット３１に固着される。駆動部材３８ａ、３８ｂ、３８ｃにはユニット保持部材３２側にピン４７、４７、４７とその先端に離脱防止部４８、４８、４８が備えられる。ピン４７には雄螺子が形成され、離脱防止部４８には雌螺子が形成される。ピン４７と離脱防止部４８は螺着して連結される。   FIG. 11 shows an imaging unit support device 30 according to the third embodiment of the present invention. In the present embodiment, the drive members 38 a, 38 b, 38 c are fixed to the imaging unit 31. The drive members 38a, 38b, 38c are provided with pins 47, 47, 47 on the unit holding member 32 side, and separation preventing portions 48, 48, 48 at the tips thereof. A male screw is formed on the pin 47, and a female screw is formed on the detachment preventing portion 48. The pin 47 and the detachment preventing portion 48 are connected by screwing.

ユニット保持部材３２において駆動部材３８ａ、３８ｂ、３８ｃと相対する箇所に孔４９、４９，４９が設けられ、ピン４７は孔４９を挿通して離脱防止部４８と連結される。孔４９の径はピン４７の径より大きく離脱防止部４８の径より小さく形成され、これによりピン４７のユニット保持部３２からの離脱が防がれる。付勢バネ３７はベース３４の４隅に取付けられ、撮像ユニット３１とユニット保持部材３２を押返すことにより、ユニット保持部材３２における撮像ユニット３１と相対する面の裏側の背面Ｂおいて、駆動部材３８ａ、３８ｂ、３８ｃを構成する離脱防止部４８、４８、４８と当接する。   Holes 49, 49, 49 are provided in the unit holding member 32 at positions opposite to the drive members 38 a, 38 b, 38 c, and the pins 47 are inserted through the holes 49 and connected to the separation preventing part 48. The diameter of the hole 49 is larger than the diameter of the pin 47 and smaller than the diameter of the detachment preventing portion 48, whereby the detachment of the pin 47 from the unit holding portion 32 is prevented. The urging springs 37 are attached to the four corners of the base 34, and push the imaging unit 31 and the unit holding member 32 back, thereby driving the driving member on the back B on the back side of the unit holding member 32 opposite to the imaging unit 31. It abuts against the separation preventing portions 48, 48, 48 constituting the members 38a, 38b, 38c.

背面Ｂ側において孔４９の周囲は凹球面状に成形され、離脱防止部４８におけるユニット保持部材３２と当接する側は凸球面状に成形される。他の構成要件は第１の実施形態と同様である。本実施形態によっても第１の実施形態と同様の効果が得られる。   On the back B side, the periphery of the hole 49 is formed in a concave spherical shape, and the side of the separation preventing portion 48 that contacts the unit holding member 32 is formed in a convex spherical shape. Other components are the same as those in the first embodiment. According to this embodiment, the same effect as that of the first embodiment can be obtained.

本発明の第１の実施形態である撮像ユニット支持装置の概略を示した電子カメラを上側から見た内部配置図である。It is the internal arrangement figure which looked at the electronic camera which showed the outline of the imaging unit support device which is the 1st embodiment of the present invention from the upper part. 撮像ユニット支持装置の図１におけるII−II線に沿う断面図である。It is sectional drawing which follows the II-II line | wire in FIG. 1 of an imaging unit support apparatus. 撮像ユニット支持装置の図２におけるIII−III線に沿う断面図である。It is sectional drawing which follows the III-III line | wire in FIG. 2 of an imaging unit support apparatus. 撮像ユニットの基板側から見た図である。It is the figure seen from the board | substrate side of the imaging unit. 撮像ユニット支持装置が撮像ユニットとユニット保持部材の間隔を広げる動作を説明する図である。It is a figure explaining the operation | movement which an imaging unit support apparatus widens the space | interval of an imaging unit and a unit holding member. 撮像ユニットを下側に傾かせる動作を説明する図である。It is a figure explaining the operation | movement which inclines an imaging unit below. 撮像ユニットを左に傾かせる動作を説明する図である。It is a figure explaining the operation | movement which inclines an imaging unit to the left. 駆動部材が撮像ユニットから受ける力を説明する図である。It is a figure explaining the force which a drive member receives from an imaging unit. 本発明の第２の実施形態である撮像ユニット支持装置の測断面図である。It is a cross-sectional view of the imaging unit support apparatus which is the 2nd Embodiment of this invention. 本発明の第２の実施形態である撮像ユニットの基板側から見た図である。It is the figure seen from the board | substrate side of the imaging unit which is the 2nd Embodiment of this invention. 本発明の第３の実施形態である撮像ユニット支持装置の平面断面側から見た図である。It is the figure seen from the plane cross section side of the imaging unit support apparatus which is the 3rd Embodiment of this invention. 圧電素子を撮像ユニットとユニット保持部材に固着した場合における圧電素子にかかる力を示す図である。It is a figure which shows the force concerning a piezoelectric element when a piezoelectric element is fixed to an imaging unit and a unit holding member.

符号の説明Explanation of symbols

３０ 撮像ユニット支持装置
３１ 撮像ユニット
３２ ユニット保持部材
３３ 撮像素子
３４ ベース
３７ 付勢バネ
３８ 駆動部材
４２ 凹陥部
４３ 基準ピン
４７ ピン
４８ 離脱防止部
DESCRIPTION OF SYMBOLS 30 Image pick-up unit support apparatus 31 Image pick-up unit 32 Unit holding member 33 Image pick-up element 34 Base 37 Biasing spring 38 Drive member 42 Recessed part 43 Reference pin 47 Pin 48 Detachment prevention part

Claims (12)

撮像素子を備えた撮像ユニットと、
前記撮像ユニットと対向する保持部材と、
前記撮像ユニットと前記保持部材との間に設けられ、一端が前記撮像ユニットあるいは前記保持部材の一方において固着され、他端が他方において当接し、前記撮像ユニットと前記保持部材の間で伸縮自在な圧電素子を有する駆動部材と、
前記撮像ユニットと前記保持部材を連結し、前記駆動部材と当接する前記撮像ユニットあるいは前記保持部材を前記駆動部材に押圧させる方向に付勢する弾性部材とを備え、
前記駆動部材が３以上の箇所に設けられ、前記３以上の箇所を直線で結ぶことにより形成される図形の重心が前記撮像素子に被写体像を結像させる光学系の光軸に重なるように配置された撮像ユニット支持装置。 An imaging unit including an imaging element;
A holding member facing the imaging unit;
Provided between the imaging unit and the holding member, one end is fixed at one of the imaging unit or the holding member, the other end abuts at the other, and is extendable between the imaging unit and the holding member A drive member having a piezoelectric element;
Connecting said holding member and the imaging unit, and an elastic member which biases the imaging unit or the holding member to which the driving member and the abutment in a direction to push the drive member,
The drive member is provided at three or more locations, and is arranged so that the center of gravity of a figure formed by connecting the three or more locations with a straight line overlaps the optical axis of an optical system that forms an object image on the image sensor. It has been captured unit support device. 前記駆動部材が前記撮像素子に被写体像を結像させる光学系の光軸の近傍に配置された請求項１に記載の撮像ユニット支持装置。   The imaging unit support device according to claim 1, wherein the driving member is disposed in the vicinity of an optical axis of an optical system that forms a subject image on the imaging element. 前記撮像ユニットあるいは前記保持部材に当接する前記駆動部材の先端が凸球面状である請求項１に記載の撮像ユニット支持装置。   The imaging unit support device according to claim 1, wherein a tip of the driving member that contacts the imaging unit or the holding member has a convex spherical shape. 前記撮像ユニットあるいは前記保持部材において前記駆動部材と当接する箇所に凹陥部が形成され、前記駆動部材の先端が前記凹陥部に係合する請求項１に記載の撮像ユニット支持装置。   The imaging unit support device according to claim 1, wherein a recessed portion is formed at a position where the imaging unit or the holding member contacts the driving member, and a distal end of the driving member is engaged with the recessed portion. 前記凹陥部が円錐状である請求項４に記載の撮像ユニット支持装置。 The imaging unit support device according to claim 4 , wherein the recess is conical. 前記駆動部材の一端に雄螺子が形成され、前記撮像ユニットあるいは前記保持部材に雌螺子が形成され、前記駆動部材を前記撮像ユニットあるいは前記保持部材に螺合して固着する請求項１に記載の撮像ユニット支持装置。   The male screw is formed on one end of the driving member, the female screw is formed on the imaging unit or the holding member, and the driving member is screwed and fixed to the imaging unit or the holding member. Imaging unit support device. 前記撮像ユニットを構成する、前記撮像素子と前記撮像素子と電気的に接続される基板との間に挟まれる板部材に前記弾性部材を連結させた請求項１に記載の撮像ユニット支持装置。   The imaging unit support device according to claim 1, wherein the elastic member is coupled to a plate member that is sandwiched between the imaging element and a substrate that is electrically connected to the imaging element, which constitutes the imaging unit. 前記駆動部材の先端に凹陥部が形成され、前記撮像ユニットあるいは前記保持部材において前記駆動部材と当接する箇所に突起が形成され、前記突起が前記凹陥部に係合する請求項１に記載の撮像ユニット支持装置。   The imaging according to claim 1, wherein a concave portion is formed at a tip of the driving member, a projection is formed at a position where the imaging unit or the holding member is in contact with the driving member, and the projection is engaged with the concave portion. Unit support device. 前記保持部材に先端が凸球面状である基準部材が設けられ、前記撮像ユニットの前記保持部材と対向する面において前記光軸と重なる箇所に円錐状の凹陥部を備え、前記基準部材の前記先端が前記凹陥部に係合する請求項１に記載の撮像ユニット支持装置。 The holding member is provided with a reference member having a convex spherical tip, and has a conical recess at a position overlapping the optical axis on the surface of the imaging unit facing the holding member, and the tip of the reference member The imaging unit supporting device according to claim 1 , wherein the imaging unit is engaged with the recessed portion. 前記駆動部材がピンと前記ピンの先端に離脱防止部とを備え、前記ピンが前記撮像ユニットあるいは前記保持部材に設けられた孔を挿通して、前記撮像ユニットと前記保持部材の相対する面の裏側の背面において前記離脱防止部が前記撮像ユニットあるいは前記保持部材と当接して、前記撮像ユニットあるいは前記保持部材から前記駆動部材の離脱を防止する請求項１に記載の撮像ユニット支持装置。   The drive member includes a pin and a detachment preventing portion at the tip of the pin, and the pin passes through a hole provided in the imaging unit or the holding member, so that the back side of the opposing surface of the imaging unit and the holding member 2. The imaging unit support device according to claim 1, wherein the detachment preventing portion is in contact with the imaging unit or the holding member on a rear surface of the camera to prevent the drive member from being detached from the imaging unit or the holding member. 前記ピンに雄螺子が形成され、前記離脱防止部に雌螺子が形成され、前記ピンを前記離脱防止部に螺着して連結する請求項１０に記載の撮像ユニット支持装置。 The imaging unit support device according to claim 10 , wherein a male screw is formed on the pin, a female screw is formed on the detachment preventing portion, and the pin is screwed to and connected to the detachment preventing portion. 撮像素子を備えた撮像ユニットと、
前記撮像ユニットと対向する保持部材と、
前記撮像ユニットと前記保持部材との間に設けられ、一端が前記撮像ユニットあるいは前記保持部材の一方において固着され、他端が他方において当接し、前記撮像ユニットと前記保持部材の間で伸縮自在な圧電素子を有する駆動部材と、
前記撮像ユニットと前記保持部材を連結し、前記接触部を前記駆動部材に押圧させる方向に付勢する弾性部材とを備え、
前記駆動部材が３以上の箇所に設けられ、前記３以上の箇所を直線で結ぶことにより形成される図形の重心が前記撮像素子に被写体像を結像させる光学系の光軸に重なるように配置された電子カメラ。 An imaging unit including an imaging element;
A holding member facing the imaging unit;
Provided between the imaging unit and the holding member, one end is fixed at one of the imaging unit or the holding member, the other end abuts at the other, and is extendable between the imaging unit and the holding member A drive member having a piezoelectric element;
Connecting said holding member and the imaging unit, and an elastic member for biasing the contact portion in a direction to be pressed to the driving member,
The drive member is provided at three or more locations, and is arranged so that the center of gravity of a figure formed by connecting the three or more locations with a straight line overlaps the optical axis of an optical system that forms an object image on the image sensor. electronic camera.
JP2004144593A 2004-05-14 2004-05-14 Imaging unit support device in electronic camera Expired - Fee Related JP4446795B2 (en)

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