JP4905170B2

JP4905170B2 - Dust removal device and imaging device

Info

Publication number: JP4905170B2
Application number: JP2007032293A
Authority: JP
Inventors: 豪松本
Original assignee: Nikon Corp
Current assignee: Nikon Corp
Priority date: 2007-02-13
Filing date: 2007-02-13
Publication date: 2012-03-28
Anticipated expiration: 2027-02-13
Also published as: JP2008199299A

Description

本発明は、撮像素子の防塵部材に付着したゴミを除去するゴミ除去装置、撮像装置、カメラに関する。 The present invention relates to a dust removal device, an imaging device, and a camera that remove dust attached to a dustproof member of an imaging device.

従来、レンズ交換可能な一眼レフレックス方式のデジタルカメラにおいて、撮像素子と撮影光学系の間に防塵部材を配設することにより、撮像素子にゴミやほこりが付着するのを防ぐと共に、防塵部材を振動させて防塵部材に付着したゴミやほこりを除去するものが知られている（特許文献１参照）。 Conventionally, in a single-lens reflex digital camera with interchangeable lenses, a dust-proof member is disposed between the image sensor and the photographing optical system, thereby preventing dust and dust from adhering to the image sensor. A device that removes dust and dirt adhering to a dust-proof member by vibrating is known (see Patent Document 1).

特開２００４−６４５５５号公報JP 2004-64555 A

特許文献１に開示されるカメラでは、防塵部材に生じる振動を阻害しないようにするため、振動の節の近傍の部位において防塵部材を支持している。したがって、レイアウトの自由度が低下し、防塵部材の支持構造の複雑化や、カメラの大型化を招くおそれがある。本発明は、防塵部材に生じる振動の節の近傍でなくとも、振動を阻害せずに防塵部材を支持することができるゴミ除去装置、撮像装置、カメラを提供することを目的とする。 In the camera disclosed in Patent Document 1, the dust-proof member is supported at a site in the vicinity of the vibration node so as not to inhibit the vibration generated in the dust-proof member. Accordingly, the degree of freedom in layout is lowered, and there is a possibility that the support structure for the dustproof member is complicated and the camera is increased in size. An object of the present invention is to provide a dust removing device, an imaging device, and a camera that can support a dust-proof member without hindering vibration, even if not near a vibration node generated in the dust-proof member.

請求項１の発明によるゴミ除去装置は、撮像素子へのゴミの付着を防止する防塵部材と、前記防塵部材に振動を生じさせる振動発生手段と、前記防塵部材と接合され、前記防塵部材よりも低い剛性を有しており、前記振動発生手段による振動によって変形する接合部材と、前記接合部材を介して前記防塵部材を支持する支持部材とを備え、前記接合部材は、前記振動発生手段へ電気エネルギーを供給するための給電端子として作用することを特徴とする。
請求項３の発明によるゴミ除去装置は、撮像素子へのゴミの付着を防止する防塵部材と、前記防塵部材に振動を生じさせる振動発生手段と、前記防塵部材と接合され、前記防塵部材よりも低い剛性を有しており、前記振動発生手段による振動によって変形する接合部材と、前記接合部材を介して前記防塵部材を支持する支持部材とを備え、前記接合部材は、前記防塵部材と前記振動発生手段との間に挟まれて配設されることを特徴とする。
請求項６の発明によるゴミ除去装置は、撮像素子へのゴミの付着を防止する防塵部材と、前記防塵部材に振動を生じさせる振動発生手段と、前記防塵部材と接合され、前記防塵部材よりも低い剛性を有しており、前記振動発生手段による振動によって変形する接合部材と、前記接合部材を介して前記防塵部材を支持する支持部材とを備え、前記接合部材の外周は、前記防塵部材の外周よりも大きく、前記支持部材による支持点は、前記防塵部材よりも外側に位置することを特徴とする。 The dust removing device according to the first aspect of the present invention is joined to the dust-proof member for preventing the dust from adhering to the image sensor, the vibration generating means for causing the dust-proof member to vibrate, and the dust-proof member. A joining member that has low rigidity and is deformed by vibration by the vibration generating means; and a support member that supports the dust-proof member via the joining member, and the joining member electrically connects the vibration generating means. It acts as a power supply terminal for supplying energy.
According to a third aspect of the present invention, there is provided a dust removing device , comprising: a dust-proof member that prevents dust from adhering to the image sensor; a vibration generating unit that generates vibration in the dust-proof member; and the dust-proof member. A joining member having low rigidity and deformed by vibration by the vibration generating means, and a support member that supports the dustproof member via the joining member, the joining member comprising the dustproof member and the vibration It is characterized by being sandwiched between the generating means.
According to a sixth aspect of the present invention, there is provided a dust removing device , comprising: a dust-proof member that prevents dust from adhering to the image sensor; a vibration generating unit that generates vibration in the dust-proof member; and the dust-proof member, A joining member that has low rigidity and is deformed by vibration by the vibration generating means; and a support member that supports the dustproof member via the joining member, and an outer periphery of the joining member is formed of the dustproof member. It is larger than the outer periphery, and the support point by the support member is located outside the dustproof member.

本発明によれば、防塵部材に生じる振動の節の近傍でなくても、その振動を阻害せずに防塵部材を支持することができる。 According to the present invention, the dust-proof member can be supported without hindering the vibration even if it is not in the vicinity of the node of the vibration generated in the dust-proof member.

図１は、本発明の一実施形態によるデジタルカメラの構成を示すブロック図である。このデジタルカメラは、カメラ本体１００と、カメラ本体１００に取り付けられた撮影レンズ２００とによって構成されている。カメラ本体１００は、ＣＰＵ１、撮像装置２、測光装置５、シーケンス装置６、フラッシュ装置７、電源部８、ファインダ内表示装置９、表示装置１０、コントローラ１１、メモリカード１２、画像処理部１３、ＲＡＭ１４、ＲＯＭ１５および操作部材１６を有している。 FIG. 1 is a block diagram showing the configuration of a digital camera according to an embodiment of the present invention. This digital camera includes a camera body 100 and a photographic lens 200 attached to the camera body 100. The camera body 100 includes a CPU 1, an imaging device 2, a photometric device 5, a sequence device 6, a flash device 7, a power supply unit 8, a viewfinder display device 9, a display device 10, a controller 11, a memory card 12, an image processing unit 13, and a RAM 14. ROM 15 and operation member 16 are provided.

ＣＰＵ１は、他の各構成部分と連動して、以降に説明するような様々な処理や制御を実行する。このＣＰＵ１がカメラ本体１００の動作状態に応じて適切な処理や制御を行うことにより、カメラ本体１００において様々な機能および動作が実現される。 The CPU 1 executes various processes and controls as described below in conjunction with other components. Various functions and operations are realized in the camera body 100 by the CPU 1 performing appropriate processing and control according to the operation state of the camera body 100.

撮像装置２は、ゴミ除去装置３および撮像素子であるＣＣＤ４を備えている。ＣＣＤ４は、撮影レンズ２００から入射された光束により結像される被写体像に基づいて、撮像信号を出力する。この撮像信号は、画像データに変換された後、ＣＰＵ１を介して画像処理部１３へ出力される。ゴミ除去装置３は、ＣＣＤ４にゴミや埃等が付着するのを防止するため、撮影レンズ２００とＣＣＤ４との間に、ＣＣＤ４を略密閉するような構造により配設されている。なお、ゴミ除去装置３に付着したゴミや埃は、ゴミ除去装置３において後で説明するようにして発生する振動により除去される。 The imaging device 2 includes a dust removal device 3 and a CCD 4 that is an imaging device. The CCD 4 outputs an imaging signal based on the subject image formed by the light beam incident from the photographing lens 200. This imaging signal is converted into image data, and then output to the image processing unit 13 via the CPU 1. The dust removing device 3 is disposed between the photographing lens 200 and the CCD 4 so as to substantially seal the CCD 4 in order to prevent dust and dirt from adhering to the CCD 4. Note that dust and dust attached to the dust removing device 3 are removed by vibration generated in the dust removing device 3 as described later.

測光装置５は、撮影レンズ２００からの入射光量を測定し、その測定結果に基づいて撮影時の適正露出を求める。測光装置５により求められた適正露出はＣＰＵ１へ出力され、シーケンス装置６の制御などに用いられる。シーケンス装置６は、ＣＰＵ１の制御に応じて、クイックリターンミラーの動作やシャッターの動作など、撮影時の一連の機構動作を制御する。フラッシュ装置７は、カメラ本体１００に内蔵されているフラッシュ装置であり、ＣＰＵ１によってその動作が制御される。 The photometric device 5 measures the amount of incident light from the photographing lens 200, and obtains an appropriate exposure during photographing based on the measurement result. The appropriate exposure obtained by the photometric device 5 is output to the CPU 1 and used for controlling the sequence device 6 and the like. The sequence device 6 controls a series of mechanism operations at the time of shooting such as the operation of the quick return mirror and the operation of the shutter according to the control of the CPU 1. The flash device 7 is a flash device built in the camera body 100 and its operation is controlled by the CPU 1.

電源部８は、カメラ本体１００の各部分や撮影レンズ２００に対して必要な電気エネルギーを適宜供給する。ファインダ内表示装置９は、カメラ本体１００のファインダ内に設けられており、カメラ本体１００の動作状態に応じて様々な情報の表示を行う。たとえば、シャッタースピード、絞り値、オートフォーカスエリアなどの情報がファインダ内表示装置９に表示される。これにより、撮影時に必要な情報をユーザに知らせることができる。 The power supply unit 8 appropriately supplies necessary electric energy to each part of the camera body 100 and the photographing lens 200. The in-finder display device 9 is provided in the finder of the camera body 100 and displays various information according to the operating state of the camera body 100. For example, information such as shutter speed, aperture value, and auto focus area is displayed on the in-finder display device 9. Thereby, it is possible to notify the user of information necessary for shooting.

表示装置１０は、ＣＰＵ１の制御により様々な画像を表示する。たとえば、カメラ本体１００において撮影された撮影画像や、カメラ本体１００に対して各種の設定を行うための様々な設定メニュー項目を含む設定メニュー画面などが表示される。この表示装置１０には、たとえば液晶ディスプレイなどが用いられており、カメラ本体１００においてユーザが見やすいような位置に設置されている。 The display device 10 displays various images under the control of the CPU 1. For example, a captured image captured by the camera body 100, a setting menu screen including various setting menu items for performing various settings on the camera body 100, and the like are displayed. For example, a liquid crystal display or the like is used for the display device 10, and the display device 10 is installed at a position where the user can easily see the camera body 100.

コントローラ１１は、ＣＰＵ１の制御により、記録媒体であるメモリカード１２に撮影画像データを記録するときの書き込み処理や、メモリカード１２に記録されている撮影画像データを読み出すときの読み出し処理を実行する。メモリカード１２はカメラ本体１００に対して着脱可能な汎用の外部記録メディアであり、カメラ本体１００による撮影画像データがコントローラ１１の書き込み処理によって記録される。 Under the control of the CPU 1, the controller 11 executes a writing process when recording captured image data on the memory card 12 that is a recording medium and a reading process when reading captured image data recorded on the memory card 12. The memory card 12 is a general-purpose external recording medium that can be attached to and detached from the camera body 100, and image data captured by the camera body 100 is recorded by a writing process of the controller 11.

画像処理部１３は、ＣＣＤ４から出力された撮像画像データに対して所定の画像処理を行う。たとえば、撮影画像の見た目を調節するための処理や、画像データの形式を変換するための処理などが、画像処理部１３において行われる。画像処理部１３により画像処理が行われた画像データは、コントローラ１１によってメモリカード１２に記録される。 The image processing unit 13 performs predetermined image processing on the captured image data output from the CCD 4. For example, the image processing unit 13 performs processing for adjusting the appearance of the captured image, processing for converting the format of the image data, and the like. The image data that has been subjected to image processing by the image processing unit 13 is recorded on the memory card 12 by the controller 11.

ＲＡＭ１４は、ＣＰＵ１が各種の処理や制御を実行する際の作業領域として用いられる。このＲＡＭ１４には、表示装置１０において画像を表示する際に用いられるＶＲＡＭも含まれている。ＲＯＭ１５は、ＣＰＵ１が各種の処理や制御を実行する際に用いられるプログラムやデータ類が記録されている。操作部材１６は、各種の操作用スイッチ類によって構成されている。操作部材１６を用いてユーザから入力された操作内容に応じて、各種の処理や制御がＣＰＵ１において実行される。 The RAM 14 is used as a work area when the CPU 1 executes various processes and controls. The RAM 14 includes a VRAM used when displaying an image on the display device 10. The ROM 15 stores programs and data used when the CPU 1 executes various processes and controls. The operation member 16 includes various operation switches. Various processes and controls are executed in the CPU 1 in accordance with the operation content input by the user using the operation member 16.

次に、ゴミ除去装置３の詳細について、図面を参照して説明する。図２は、ゴミ除去装置３を構成する防塵部材３１、接合部材３２および振動部材３３の平面図および断面図である。図２において、（ａ）の平面図には、カメラ本体１００において撮影レンズ２００の方向から見たときの防塵部材３１、接合部材３２および振動部材３３の平面形状を示している。一方、（ｂ）の断面図には、（ａ）の平面図において中心線Ａ−Ａで切断したときの防塵部材３１、接合部材３２および振動部材３３の断面を示している。この図に示すように、防塵部材３１は円盤状の形状を有しており、接合部材３２および振動部材３３は円環状の形状を有している。 Next, details of the dust removing device 3 will be described with reference to the drawings. FIG. 2 is a plan view and a cross-sectional view of the dust-proof member 31, the joining member 32, and the vibration member 33 that constitute the dust removing device 3. 2A is a plan view of the dust-proof member 31, the joining member 32, and the vibration member 33 when viewed from the direction of the photographing lens 200 in the camera body 100. On the other hand, the cross-sectional view of (b) shows a cross section of the dust-proof member 31, the joining member 32, and the vibration member 33 when cut along the center line AA in the plan view of (a). As shown in this figure, the dust-proof member 31 has a disk shape, and the joining member 32 and the vibration member 33 have an annular shape.

防塵部材３１は、図１のＣＣＤ４にゴミや埃等が付着するのを防止するために用いられるものであり、ＣＣＤ４を覆うように配設されている。この防塵部材３１は、撮影レンズ２００を介してＣＣＤ４上に入射する被写体光の光路上に設けられており、ガラス等の透明な素材によって組成されている。 The dustproof member 31 is used to prevent dust and dirt from adhering to the CCD 4 in FIG. 1 and is disposed so as to cover the CCD 4. The dust-proof member 31 is provided on the optical path of subject light incident on the CCD 4 via the photographing lens 200, and is composed of a transparent material such as glass.

接合部材３２は、防塵部材３１よりも低い剛性を有しており、薄い板状の金属などにより組成されている。なお、図２に示すとおり、接合部材３２の外周は防塵部材３１の外周よりも大きく、防塵部材３１の一部分と、接合部材３２の一部分とは、互いに重なり合っている。接合部材３２は、防塵部材３１と重なり合う部分で、防塵部材３１に接合されている。 The joining member 32 has lower rigidity than the dust-proof member 31, and is composed of a thin plate-like metal or the like. As shown in FIG. 2, the outer periphery of the joining member 32 is larger than the outer periphery of the dust-proof member 31, and a part of the dust-proof member 31 and a part of the joining member 32 overlap each other. The joining member 32 is joined to the dust-proof member 31 at a portion overlapping the dust-proof member 31.

振動部材３３は、圧電効果を生じる圧電素子であり、圧電セラミクスなどによって組成されている。この圧電セラミクスの材料には、たとえばＰＺＴ（チタン酸ジルコン酸鉛）などが知られている。振動部材３３に電気信号が印加されると、振動部材３３は、その電気信号に応じて、光軸と垂直な方向、すなわち図２（ａ）において紙面と平行な半径方向に、周期的に伸縮運動を繰り返す。この伸縮運動により、防塵部材３１において後述するような振動が生じる。なお、振動部材３３は、接合部材３２の防塵部材３１との接合部分であって防塵部材３１とは反対側の面に貼り付けられている。すなわち、接合部材３２は、防塵部材３１と振動部材３３との間に挟まれて配設されている。 The vibration member 33 is a piezoelectric element that generates a piezoelectric effect, and is composed of piezoelectric ceramics or the like. As a material of this piezoelectric ceramic, for example, PZT (lead zirconate titanate) is known. When an electric signal is applied to the vibration member 33, the vibration member 33 periodically expands and contracts in the direction perpendicular to the optical axis, that is, in the radial direction parallel to the paper surface in FIG. Repeat exercise. Due to this expansion and contraction motion, vibrations described later occur in the dustproof member 31. The vibration member 33 is a portion where the bonding member 32 is bonded to the dust-proof member 31 and is attached to a surface opposite to the dust-proof member 31. That is, the joining member 32 is disposed between the dust-proof member 31 and the vibration member 33.

図３は、以上説明した防塵部材３１、接合部材３２および振動部材３３を有するゴミ除去装置３とＣＣＤ４とが設置された撮像装置２の平面図および断面図を示している。図３において、（ａ）の平面図には、カメラ本体１００において撮影レンズ２００の方向から見たときの撮像装置２の平面形状を示している。（ｂ）の断面図には、（ａ）の平面図において中心線Ｂ−Ｂで切断したときの撮像装置２の断面を示している。 FIG. 3 shows a plan view and a cross-sectional view of the imaging device 2 in which the dust removing device 3 having the dustproof member 31, the joining member 32, and the vibration member 33 described above and the CCD 4 are installed. 3, a plan view of (a) shows a planar shape of the imaging device 2 when viewed from the direction of the photographing lens 200 in the camera body 100. FIG. The cross-sectional view of (b) shows a cross-section of the imaging device 2 when cut along the center line BB in the plan view of (a).

図３に示すように、撮像装置２において、ＣＣＤ４の全体は接合部材３２よりも内側に位置している。したがって、撮影レンズ２００からの入射光束は、接合部材３２によって遮られずに、透明な防塵部材３１を透過してＣＣＤ４に到達する。これにより、被写体像が欠けることなくＣＣＤ４上に結像され、その撮像信号がＣＣＤ４から出力される。 As shown in FIG. 3, in the imaging device 2, the entire CCD 4 is located inside the bonding member 32. Therefore, the incident light beam from the photographic lens 200 is not blocked by the bonding member 32 but passes through the transparent dustproof member 31 and reaches the CCD 4. As a result, the subject image is formed on the CCD 4 without missing, and the image pickup signal is output from the CCD 4.

ゴミ除去装置３は、防塵部材３１、接合部材３２および振動部材３３に加えて、さらに支持部材３４および駆動部３５を有している。支持部材３４は、一定幅のリング状の形状を有しており、接合部材３２の外縁部に沿って、ＣＣＤ４が配設された基板４１と接合部材３２との間に配設されている。そして、支持部材３４の下面は基板４１と接合されており、上面は接合部材３２の外縁部に接合されている。この接合部は、接合部材３２と防塵部材３１との接合面よりも接合部材３２の外周側である。すなわち、この支持部材３４により、防塵部材３１が接合部材３２を介して支持されている。このような支持構造とすることで、防塵部材３１、支持部材３４および接合部材３２を用いて、基板４１とゴミ除去装置３との間にＣＣＤ４を略密閉する空間が形成されている。 The dust removing device 3 further includes a support member 34 and a drive unit 35 in addition to the dustproof member 31, the joining member 32, and the vibration member 33. The support member 34 has a ring shape with a constant width, and is disposed between the substrate 41 on which the CCD 4 is disposed and the bonding member 32 along the outer edge portion of the bonding member 32. The lower surface of the support member 34 is bonded to the substrate 41, and the upper surface is bonded to the outer edge portion of the bonding member 32. This joining portion is on the outer peripheral side of the joining member 32 with respect to the joining surface between the joining member 32 and the dust-proof member 31. That is, the dust-proof member 31 is supported by the support member 34 via the bonding member 32. With such a support structure, a space for substantially sealing the CCD 4 is formed between the substrate 41 and the dust removing device 3 using the dustproof member 31, the support member 34, and the joining member 32.

駆動部３５は、接合部材３２と振動部材３３に接続されており、交流電気信号を発生する。駆動部３５により発生された交流電気信号は、振動部材３３において、接合部材３２に接している側の面と、基板４１側の面とにそれぞれ印加される。このとき、基板４１側の面には駆動部３５からの交流電気信号が直接印加される。一方、接合部材３２に接している側の面には、駆動部３５からの交流電気信号が接合部材３２を介して印加される。すなわち、接合部材３２は、振動部材３３へ電気信号を供給するための給電端子として作用する。これにより、振動部材３３において前述したような伸縮運動が周期的に生じる。 The drive unit 35 is connected to the joining member 32 and the vibration member 33 and generates an alternating current electric signal. The AC electrical signal generated by the drive unit 35 is applied to the surface of the vibration member 33 that is in contact with the bonding member 32 and the surface of the substrate 41. At this time, an AC electrical signal from the drive unit 35 is directly applied to the surface on the substrate 41 side. On the other hand, an AC electrical signal from the drive unit 35 is applied to the surface on the side in contact with the joining member 32 via the joining member 32. That is, the joining member 32 acts as a power feeding terminal for supplying an electric signal to the vibration member 33. Thereby, the expansion and contraction motion as described above is periodically generated in the vibration member 33.

駆動部３５からの交流電気信号により、振動部材３３が撮影レンズ２００の光軸と垂直な方向（すなわちＣＣＤ４の撮像面と垂直な方向）に伸びると、その動きに応じて、防塵部材３１および接合部材３２の裏側、すなわちＣＣＤ４が位置する側の面において、同じ方向に伸びようとする力が生じる。すると、防塵部材３１および接合部材３２が変形し、防塵部材３１がその表側、すなわちＣＣＤ４が位置するのと反対側の方向に膨らむ。その様子を図４の断面図に示す。この図４の断面図は、図３（ｂ）の断面図と同様に、図３（ａ）の平面図において中心線Ｂ−Ｂで切断したときの撮像装置２の断面を示している。 When the vibration member 33 extends in a direction perpendicular to the optical axis of the photographing lens 200 (that is, a direction perpendicular to the imaging surface of the CCD 4) by the AC electrical signal from the drive unit 35, the dust-proof member 31 and the bonding member are bonded according to the movement. On the back side of the member 32, that is, the surface on the side where the CCD 4 is located, a force is generated to extend in the same direction. Then, the dustproof member 31 and the joining member 32 are deformed, and the dustproof member 31 swells in the direction opposite to the front side, that is, the side where the CCD 4 is located. This is shown in the sectional view of FIG. 4 is a cross-sectional view of the imaging device 2 taken along the center line BB in the plan view of FIG. 3 (a), similarly to the cross-sectional view of FIG. 3 (b).

一方、駆動部３５からの交流電気信号により、振動部材３３が光軸と垂直な方向に縮むと、その動きに応じて、防塵部材３１および接合部材３２の裏側において、同じ方向に縮もうとする力が生じる。すると、図４の断面図に示すのとは逆の方向に防塵部材３１および接合部材３２が変形する。その結果、防塵部材３１が裏側の方向に膨らむ。 On the other hand, when the vibration member 33 is contracted in the direction perpendicular to the optical axis by the AC electrical signal from the drive unit 35, it tries to contract in the same direction on the back side of the dust-proof member 31 and the joining member 32 according to the movement. Power is generated. Then, the dustproof member 31 and the joining member 32 are deformed in the direction opposite to that shown in the cross-sectional view of FIG. As a result, the dustproof member 31 swells in the reverse direction.

防塵部材３１および接合部材３２において、駆動部３５からの交流電気信号に応じて、上記のような屈曲動作が振動部材３３の伸縮運動に応じて周期的に繰り返される。その結果、防塵部材３１において屈曲振動が生じる。この屈曲振動により、防塵部材３１に付着したゴミや埃を除去することができる。 In the dustproof member 31 and the joining member 32, the bending operation as described above is periodically repeated according to the expansion / contraction motion of the vibration member 33 in accordance with the AC electrical signal from the drive unit 35. As a result, bending vibration occurs in the dustproof member 31. By this bending vibration, dust and dust attached to the dust-proof member 31 can be removed.

以上説明したように、防塵部材３１が振動する際には、防塵部材３１とともに、防塵部材３１よりも低い剛性を有する接合部材３２も変形する。したがって、防塵部材３１に生じる振動の節の近傍でなくても、その振動を阻害せずに、支持部材３４によって防塵部材３１を支持することができる。なお、支持部材３４による支持点は、防塵部材３１および接合部材３２を効率的に変形させると共に、ＣＣＤ４を設置可能な空間をできるだけ大きく確保するために、防塵部材３１よりも外側に位置している。 As described above, when the dust-proof member 31 vibrates, the joint member 32 having rigidity lower than that of the dust-proof member 31 is also deformed together with the dust-proof member 31. Therefore, the dust-proof member 31 can be supported by the support member 34 without hindering the vibration even if it is not in the vicinity of the node of the vibration generated in the dust-proof member 31. The support point by the support member 34 is located outside the dust-proof member 31 in order to efficiently deform the dust-proof member 31 and the joining member 32 and to secure as large a space where the CCD 4 can be installed. .

ところで、防塵部材３１、接合部材３２および振動部材３３を一体化された振動体と見なして考えると、この振動体は、材質や形状等に応じた固有の共振周波数を有している。この共振周波数と同じ周波数の交流電気信号を駆動部３５から発生させて振動部材３３に印加すると、振動体が共振状態で屈曲振動するため、その振幅が最大となる。たとえば、共振周波数が２０〜６０ｋＨｚ程度の場合には、４μｍ程度の振幅が得られる。したがって、防塵部材３１に付着したゴミや埃を振動により取り除く際には、その効果が最大となるように、共振周波数と同じ周波数の交流電気信号を駆動部３５において発生することが好ましい。なお、製造時の寸法や質量等のばらつき、取付け誤差などにより、振動体の正確な共振周波数が不明な場合もあるため、駆動部３５から発生する交流電気信号を所定の範囲内で変化させてもよい。 By the way, when the dust-proof member 31, the joining member 32, and the vibration member 33 are considered as an integrated vibration body, the vibration body has a specific resonance frequency corresponding to the material, shape, and the like. When an AC electrical signal having the same frequency as the resonance frequency is generated from the drive unit 35 and applied to the vibration member 33, the vibration body bends and vibrates in a resonance state, and thus the amplitude becomes maximum. For example, when the resonance frequency is about 20 to 60 kHz, an amplitude of about 4 μm is obtained. Therefore, when removing dust and dirt adhering to the dust-proof member 31 by vibration, it is preferable to generate an AC electrical signal having the same frequency as the resonance frequency in the drive unit 35 so that the effect is maximized. Note that the exact resonant frequency of the vibrating body may not be known due to variations in dimensions, mass, etc. during manufacture, mounting errors, etc., so the AC electrical signal generated from the drive unit 35 is changed within a predetermined range. Also good.

以上説明した実施の形態によれば、次の作用効果を奏する。
（１）防塵部材３１を接合部材３２を介して支持部材３４により支持する。この接合部材３２は、防塵部材３１よりも低い剛性を有しており、振動部材３３によって防塵部材３１とともに変形することとした。このようにしたので、防塵部材３１に生じる振動の節の近傍でなくても、その振動を阻害せずに防塵部材３１を支持することができる。 According to the embodiment described above, the following operational effects are obtained.
(1) The dust-proof member 31 is supported by the support member 34 via the joining member 32. The joining member 32 has lower rigidity than the dustproof member 31 and is deformed together with the dustproof member 31 by the vibration member 33. Since it did in this way, even if it is not the vicinity of the node of the vibration which arises in the dustproof member 31, the dustproof member 31 can be supported, without inhibiting the vibration.

（２）接合部材３２は、金属により組成することができる。このようにすれば、ガラス等によって組成される防塵部材３１よりも低い剛性を有しており、振動部材３３によって防塵部材３１とともに変形する接合部材３２を、容易に実現することができる。 (2) The joining member 32 can be composed of metal. In this way, it is possible to easily realize the joining member 32 that has lower rigidity than the dust-proof member 31 composed of glass or the like and is deformed together with the dust-proof member 31 by the vibration member 33.

（３）接合部材３２は、駆動部３５から振動部材３３へ電気エネルギーを供給するための給電素子として作用することとした。このようにすれば、電気エネルギー供給用の配線を新たに設けることなく、駆動部３５から振動部材３３へ電気エネルギーを供給することができる。 (3) The joining member 32 acts as a power feeding element for supplying electrical energy from the drive unit 35 to the vibration member 33. In this way, electric energy can be supplied from the drive unit 35 to the vibration member 33 without newly providing a wiring for supplying electric energy.

（４）また、接合部材３２は、防塵部材３１と振動部材３３との間に挟まれて配設されることとした。このようにしたので、振動部材３３によって防塵部材３１に生じる振動を阻害することなく、接合部材３２を効率的に配設することができる。 (4) Further, the joining member 32 is disposed between the dust-proof member 31 and the vibration member 33. Since it did in this way, the joining member 32 can be arrange | positioned efficiently, without inhibiting the vibration which arises in the dust-proof member 31 by the vibration member 33. FIG.

（５）接合部材３２の外周は、防塵部材３１の外周よりも大きいこととした。また、支持部材３４による支持点は、防塵部材３１よりも外側に位置することとした。このようにしたので、防塵部材３１および接合部材３２を効率的に変形させると共に、ＣＣＤ４を設置可能な空間をできるだけ大きく確保することができる。 (5) The outer periphery of the joining member 32 is larger than the outer periphery of the dust-proof member 31. Further, the support point by the support member 34 is positioned outside the dust-proof member 31. Since it did in this way, while preventing the dust-proof member 31 and the joining member 32 efficiently, the space which can install CCD4 can be ensured as much as possible.

（６）防塵部材３１、支持部材３４および接合部材３２を用いて、ＣＣＤ４を略密閉する空間を形成することとした。このようにしたので、カメラ本体１００から撮影レンズ２００を取り外したときなどに、ＣＣＤ４にゴミや埃が付着するのを防ぐことができる。 (6) Using the dustproof member 31, the support member 34, and the joining member 32, a space for substantially sealing the CCD 4 is formed. Since this is done, it is possible to prevent dust and dirt from adhering to the CCD 4 when the photographing lens 200 is detached from the camera body 100.

なお、以上説明した実施の形態では、図２に示すように、防塵部材３１と振動部材３３との間に挟まれて接合部材３２が配設されることとした。しかし、必ずしもこのような配置としなくてもよい。たとえば図５の平面図および断面図に示すように、振動部材３３と接合部材３２との間に挟まれて防塵部材３１が配設されることとしてもよい。このようにしても、図２に示す場合と同様に、振動部材３３によって防塵部材３１に生じる振動を阻害することなく、接合部材３２を効率的に配設することができる。なお、図５も図２と同様に、（ａ）の平面図には、カメラ本体１００において撮影レンズ２００の方向から見たときの防塵部材３１、接合部材３２および振動部材３３の平面形状を示している。一方、（ｂ）の断面図には、（ａ）の平面図において中心線Ｃ−Ｃで切断したときの防塵部材３１、接合部材３２および振動部材３３の断面を示している。 In the embodiment described above, the joining member 32 is disposed between the dust-proof member 31 and the vibration member 33 as shown in FIG. However, such an arrangement is not necessarily required. For example, as shown in the plan view and the cross-sectional view of FIG. 5, the dust-proof member 31 may be disposed so as to be sandwiched between the vibration member 33 and the joining member 32. Even in this case, similarly to the case shown in FIG. 2, the joining member 32 can be efficiently disposed without inhibiting the vibration generated in the dust-proof member 31 by the vibration member 33. 5A and 5B, the plan view of FIG. 5A shows the planar shapes of the dust-proof member 31, the joining member 32, and the vibration member 33 when viewed from the direction of the photographing lens 200 in the camera body 100. FIG. ing. On the other hand, the cross-sectional view of (b) shows a cross section of the dust-proof member 31, the joining member 32, and the vibration member 33 when cut along the center line CC in the plan view of (a).

さらに、図２または図５において、防塵部材３１と接合部材３２の配置を入れ替えても、同じように振動部材３３によって防塵部材３１に生じる振動を阻害することなく、接合部材３２を効率的に配設することができる。すなわち、防塵部材３１と接合部材３２とが接して配設されている限り、どのような配置としてもよい。 Further, in FIG. 2 or FIG. 5, even if the arrangement of the dust-proof member 31 and the joining member 32 is changed, the joining member 32 is arranged efficiently without hindering the vibration generated in the dust-proof member 31 by the vibration member 33. Can be set. That is, as long as the dustproof member 31 and the joining member 32 are disposed in contact with each other, any arrangement may be employed.

また、以上説明した実施の形態では、防塵部材３１が略円形の形状を有していたが、防塵部材３１は他の形状でもよい。たとえば、略方形の形状などを用いることができる。その場合は、接合部材３２と振動部材３３の形状も、防塵部材３１の形状に合わせることが好ましい。 In the embodiment described above, the dustproof member 31 has a substantially circular shape, but the dustproof member 31 may have other shapes. For example, a substantially square shape can be used. In that case, it is preferable to match the shape of the joining member 32 and the vibration member 33 to the shape of the dust-proof member 31.

上記において説明した実施の形態では、防塵部材３１に生じる振動が一次モードの屈曲振動である例を説明したが、本発明はこの内容に限定されない。すなわち、任意の次数の振動モードにより防塵部材３１を屈曲振動させることができる。 In the embodiment described above, the example in which the vibration generated in the dust-proof member 31 is the bending vibration of the primary mode has been described, but the present invention is not limited to this content. That is, the dust-proof member 31 can be bent and vibrated in an arbitrary order of vibration mode.

以上説明した実施の形態では、撮像素子を有するデジタルカメラを例に説明したが、デジタルビデオカメラについても同様に、本発明を適用することができる。 In the embodiment described above, the digital camera having the image sensor has been described as an example. However, the present invention can also be applied to a digital video camera.

以上説明した実施の形態や各種の変形例はあくまで一例であり、発明の特徴が損なわれない限り、本発明はこれらの内容に限定されない。 The embodiment and various modifications described above are merely examples, and the present invention is not limited to these contents as long as the features of the invention are not impaired.

本発明の一実施形態によるデジタルカメラの構成を示すブロック図である。It is a block diagram which shows the structure of the digital camera by one Embodiment of this invention. 防塵部材、接合部材および振動部材の平面図および断面図である。It is the top view and sectional drawing of a dustproof member, a joining member, and a vibration member. ゴミ除去装置とＣＣＤとが設置された撮像装置の平面図および断面図である。It is the top view and sectional drawing of an imaging device with which a dust removal device and CCD were installed. 振動発生時に防塵部材および接合部材が変形した様子を示す撮像装置の断面図である。It is sectional drawing of the imaging device which shows a mode that the dust-proof member and the joining member deform | transformed at the time of vibration generation. 振動部材と接合部材との間に挟まれて防塵部材が配設されたときの防塵部材、接合部材および振動部材の平面図および断面図である。It is the top view and sectional drawing of a dustproof member, a joining member, and a vibration member when it is pinched | interposed between a vibration member and a joining member, and the dustproof member is arrange | positioned.

Explanation of symbols

１：ＣＰＵ２：撮像装置
３：ゴミ除去装置４：ＣＣＤ
５：測光装置６：シーケンス装置
７：フラッシュ装置８：電源部
９：ファインダ内表示装置１０：表示装置
１１：コントローラ１２：メモリカード
１３：画像処理部１４：ＲＡＭ
１５：ＲＯＭ１６：操作部材
１００：カメラ本体２００：撮影レンズ 1: CPU 2: Imaging device 3: Dust removal device 4: CCD
5: Photometry device 6: Sequence device 7: Flash device 8: Power supply unit 9: Display device in viewfinder 10: Display device 11: Controller 12: Memory card 13: Image processing unit 14: RAM
15: ROM 16: Operation member 100: Camera body 200: Shooting lens

Claims

A dust-proof member for preventing dust from adhering to the image sensor;
Vibration generating means for generating vibration in the dustproof member;
A joining member joined to the dust-proof member, having a lower rigidity than the dust-proof member, and deformed by vibration by the vibration generating means;
A support member for supporting the dustproof member via the joining member ,
The dust removing apparatus , wherein the joining member acts as a power supply terminal for supplying electric energy to the vibration generating means .

The dust removal apparatus according to claim 1,
The dust removing apparatus, wherein the joining member is composed of metal.

A dust-proof member for preventing dust from adhering to the image sensor;
Vibration generating means for generating vibration in the dustproof member;
A joining member joined to the dust-proof member, having a lower rigidity than the dust-proof member, and deformed by vibration by the vibration generating means;
A support member for supporting the dustproof member via the joining member,
The dust removing apparatus, wherein the joining member is disposed between the dust-proof member and the vibration generating means .

The dust removal apparatus according to claim 3 ,
The dust removing apparatus, wherein the joining member is composed of metal .

The dust removal apparatus according to claim 3 or 4 ,
The dust removing apparatus , wherein the joining member acts as a power supply terminal for supplying electric energy to the vibration generating means .

A dust-proof member for preventing dust from adhering to the image sensor;
Vibration generating means for generating vibration in the dustproof member;
A joining member joined to the dust-proof member, having a lower rigidity than the dust-proof member, and deformed by vibration by the vibration generating means;
A support member for supporting the dustproof member via the joining member,
The outer periphery of the joining member is larger than the outer periphery of the dust-proof member,
The dust removal apparatus , wherein a support point by the support member is located outside the dustproof member .

The dust removal apparatus according to claim 6 ,
The dust removing apparatus , wherein the joining member is composed of metal .

The dust removal apparatus according to claim 6 or 7 ,
The dust removing apparatus , wherein the joining member acts as a power supply terminal for supplying electric energy to the vibration generating means .

In the dust removal device according to any one of claims 6 to 8,
The dust removing apparatus , wherein the joining member is disposed between the dust-proof member and the vibration generating means .

The dust removing device according to any one of claims 1 to 9,
An imaging device comprising: an imaging device that outputs an imaging signal of a subject based on an incident light beam.