JP2020173421A - Imaging apparatus - Google Patents
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Abstract
Description
本発明は、撮像装置に関し、特にフィルタ等の光学部材を光路中に挿抜する機構を備えた撮像装置に関する。 The present invention relates to an image pickup device, and more particularly to an image pickup device provided with a mechanism for inserting and removing an optical member such as a filter into an optical path.
従来、監視カメラ等の撮像装置においては、夜間や暗部の撮影時に、入射する赤外線を利用して画像を得るために、モータ等の駆動手段を用いて赤外線遮断用のフィルタを光路中より退避させるフィルタ切り替え機構が搭載されている。 Conventionally, in an imaging device such as a surveillance camera, a filter for blocking infrared rays is retracted from the optical path by using a driving means such as a motor in order to obtain an image by using the incident infrared rays at night or when shooting a dark part. A filter switching mechanism is installed.
例えば、特許文献１には、レバーのついたアクチュエータによって羽根をスライドさせる機構を用いてフィルタを保持したフィルタ枠を光路中にスライドさせるフィルタ切替え機構を有したフィルタ切り替えユニットを開示している。特許文献１では、該フィルタ切替えユニットをレンズ鏡筒の側面に設けた開口部から挿入するようにした構成が開示されている。 For example, Patent Document 1 discloses a filter switching unit having a filter switching mechanism that slides a filter frame holding a filter into an optical path by using a mechanism that slides blades by an actuator with a lever. Patent Document 1 discloses a configuration in which the filter switching unit is inserted through an opening provided on the side surface of the lens barrel.
しかしながら、特許文献１に開示された従来技術では、フィルタ切り替えユニットとレンズ鏡筒の側面に設けた開口部との隙間から異物が進入し撮像素子の受光面上に付着することで画質が劣化してしまう。 However, in the prior art disclosed in Patent Document 1, foreign matter enters through the gap between the filter switching unit and the opening provided on the side surface of the lens barrel and adheres to the light receiving surface of the image sensor, so that the image quality deteriorates. It ends up.
そこで、本発明の目的は、光学部材としてのフィルタを光路中に挿抜するフィルタ切り替え機構がレンズ鏡筒と撮像素子の間に設けられている構成において、異物が撮像素子の受光面上に付着することを防止することが可能な撮像装置を提供することである。 Therefore, an object of the present invention is a configuration in which a filter switching mechanism for inserting and removing a filter as an optical member in an optical path is provided between a lens barrel and an image sensor, and foreign matter adheres to the light receiving surface of the image sensor. It is to provide an image pickup apparatus which can prevent such a thing.
本発明の一側面としての撮像装置は、撮像素子を保持する基板と、光路中に挿抜可能に光学部材を保持し、レンズ鏡筒と前記撮像素子の間に保持される保持部材と、前記光学部材より前記撮像素子側に設けられ、前記撮像素子の受光面の周囲を包囲する封止部材と、を有し、前記封止部材は、前記基板と当接する第１の封止部と、前記保持部材と当接する第２の封止部とを備える。 An image pickup device as one aspect of the present invention includes a substrate that holds an image pickup element, a holding member that holds an optical member that can be inserted and removed in an optical path, and is held between a lens barrel and the image pickup element, and the optical. It has a sealing member provided on the image pickup element side of the member and surrounding the periphery of the light receiving surface of the image pickup element, and the sealing member includes a first sealing portion that abuts on the substrate and the sealing member. It is provided with a second sealing portion that comes into contact with the holding member.
本発明の他の目的及び特徴は、以下の実施形態において説明される。 Other objects and features of the present invention will be described in the following embodiments.
本発明によれば、フィルタを光路中に挿抜するフィルタ切り替え機構がレンズ鏡筒と撮像素子の間に設けられている構成において、異物が撮像素子の受光面上に付着することを防止することが可能な撮像装置を提供することができる。 According to the present invention, in a configuration in which a filter switching mechanism for inserting and removing a filter in an optical path is provided between a lens barrel and an image sensor, it is possible to prevent foreign matter from adhering to the light receiving surface of the image sensor. A possible imaging device can be provided.
以下に、本発明の好ましい実施の形態を、添付の図面に基づいて詳細に説明する。図１は、本発明の実施形態にかかわる撮像装置の斜視図である。 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a perspective view of an image pickup apparatus according to an embodiment of the present invention.
以下、図１〜図１３を参照して、本発明の第１の実施例による撮像装置について説明する。 Hereinafter, the imaging apparatus according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 13.
図１において、１は撮像装置を示す。図２において、２は撮像装置１の内部に含まれるカメラユニットを示す。図３は、カメラユニット２の断面図である。３は前側ホルダを示し、４は後ろ側ホルダを示す。５はレンズ鏡筒ユニットを示し、レンズ鏡筒ユニット５は、前側ホルダ３と後ろ側ホルダ４に挟持されて固定される。 In FIG. 1, 1 indicates an imaging device. In FIG. 2, reference numeral 2 denotes a camera unit included inside the image pickup apparatus 1. FIG. 3 is a cross-sectional view of the camera unit 2. 3 indicates a front holder, and 4 indicates a rear holder. Reference numeral 5 denotes a lens barrel unit, and the lens barrel unit 5 is sandwiched and fixed between the front holder 3 and the rear holder 4.
図４は、レンズ鏡筒ユニット５の分解斜視図である。１１は撮影レンズユニットを示し、１２は固定鏡筒（レンズ鏡筒）を示す。撮影レンズユニット１１は固定鏡筒１２にねじ込んで固定される。１３は弾性部材からなる防塵ゴム（封止部材）を示し、１４は撮像素子基板（基板）を示す。１５は撮像素子を示し、撮像素子基板１４に実装される。撮像素子基板１４は固定鏡筒１２に固定され、防塵ゴム１３は固定鏡筒１２と撮像素子基板１４に挟持される。 FIG. 4 is an exploded perspective view of the lens barrel unit 5. Reference numeral 11 is a photographing lens unit, and 12 is a fixed lens barrel (lens lens barrel). The photographing lens unit 11 is screwed into the fixed lens barrel 12 and fixed. Reference numeral 13 denotes a dust-proof rubber (sealing member) made of an elastic member, and 14 indicates an image sensor substrate (substrate). Reference numeral 15 denotes an image sensor, which is mounted on the image sensor substrate 14. The image sensor substrate 14 is fixed to the fixed lens barrel 12, and the dustproof rubber 13 is sandwiched between the fixed lens barrel 12 and the image sensor substrate 14.
１６はフィルタベース（保持部材）を示す。１７はフィルタ保持枠（光学部材保持枠）を示し、一側面にラックギヤ１７ａが形成されている。１８は光学部材としての赤外カットフィルタを示し、１９はダミーガラスを示し、共にフィルタ保持枠１７に固定される。フィルタ保持枠１７は撮影レンズユニット１１の光軸に直交する方向に移動可能なようにフィルタベース１６上に保持されており、フィルタベース１６は固定鏡筒１２の側面に設けた開口部より挿入されて固定鏡筒１２に保持される。２０はフィルタ保持枠１７を光軸直交方向に駆動するためのアクチュエータを示す。２１はアクチュエータ２０に接続されたフレキシブルプリント基板を示す。２２はフィルタ保持枠１７の光軸直交方向の位置を検出するためのフォトインタラプタを示し、フレキシブルプリント基板２１に実装されている。２３はウォームギヤを示し、アクチュエータ２０のロータの回転軸に固定されている。２４は中間ギヤを示し、ウォームギヤ２３に噛合するはす歯ギヤと同軸上にフィルタ保持枠１７上に形成されたラックギヤ１７ａと噛合するピニオンギヤが形成されている。２５はギヤカバーを示し、アクチュエータ２０を保持すると共に、中間ギヤ２４を固定鏡筒１２との間で回動可能に挟持する。
次に本実施例のフィルタ切り替え動作について図４を用いて説明する。撮像素子基板１４に接続された図示しない電気配線を介してアクチュエータ２０に駆動信号が入力されると、アクチュエータ２０のロータが回転軸周りに回転する。アクチュエータ２０のロータが回転すると、アクチュエータ２０のロータの回転軸に固定されたウォームギヤ２３にはす歯ギヤが噛合した中間ギヤ２４が回転する。中間ギヤ２４が回転すると、中間ギヤ２４の平歯ギヤにラックギヤ１７ａが噛合したフィルタ保持枠１７が光軸直交方向に移動する。アクチュエータ２０には、所定の移動量だけフィルタ保持枠１７が移動すると停止するよう駆動信号が入力される。図３は赤外カットフィルタ１８が光路中に挿入された状態を示しているのに対して、図５はダミーガラス１９が光路中に挿入された状態を示しており、図中の矢印で示す光軸直交方向にフィルタ保持枠１７が駆動されることにより、赤外カットフィルタ１８またはダミーガラス１９が選択的に光路中に挿抜可能に挿入される。
16 indicates a filter base (holding member). Reference numeral 17 denotes a filter holding frame (optical member holding frame), and a rack gear 17a is formed on one side surface thereof. Reference numeral 18 denotes an infrared cut filter as an optical member, and 19 indicates a dummy glass, both of which are fixed to the filter holding frame 17. The filter holding frame 17 is held on the filter base 16 so as to be movable in a direction orthogonal to the optical axis of the photographing lens unit 11, and the filter base 16 is inserted through an opening provided on the side surface of the fixed lens barrel 12. Is held in the fixed lens barrel 12. Reference numeral 20 denotes an actuator for driving the filter holding frame 17 in the direction orthogonal to the optical axis. Reference numeral 21 denotes a flexible printed circuit board connected to the actuator 20. Reference numeral 22 denotes a photo interrupter for detecting the position of the filter holding frame 17 in the direction orthogonal to the optical axis, which is mounted on the flexible printed circuit board 21. Reference numeral 23 denotes a worm gear, which is fixed to the rotating shaft of the rotor of the actuator 20. Reference numeral 24 denotes an intermediate gear, and a pinion gear that meshes with the rack gear 17a formed on the filter holding frame 17 coaxially with the tooth tooth gear that meshes with the worm gear 23 is formed. Reference numeral 25 denotes a gear cover, which holds the actuator 20 and rotatably sandwiches the intermediate gear 24 with the fixed lens barrel 12.
Next, the filter switching operation of this embodiment will be described with reference to FIG. When a drive signal is input to the actuator 20 via an electrical wiring (not shown) connected to the image sensor substrate 14, the rotor of the actuator 20 rotates around a rotation axis. When the rotor of the actuator 20 rotates, the intermediate gear 24 in which the tooth gear meshes with the worm gear 23 fixed to the rotation shaft of the rotor of the actuator 20 rotates. When the intermediate gear 24 rotates, the filter holding frame 17 in which the rack gear 17a meshes with the spur tooth gear of the intermediate gear 24 moves in the direction orthogonal to the optical axis. A drive signal is input to the actuator 20 so that the filter holding frame 17 stops when the filter holding frame 17 moves by a predetermined amount of movement. FIG. 3 shows a state in which the infrared cut filter 18 is inserted in the optical path, whereas FIG. 5 shows a state in which the dummy glass 19 is inserted in the optical path, which is indicated by an arrow in the figure. By driving the filter holding frame 17 in the direction orthogonal to the optical axis, the infrared cut filter 18 or the dummy glass 19 is selectively inserted into the optical path so that it can be inserted and removed.
次に、本実施例における防塵ゴム１３の作用について説明する。図６は固定鏡筒１２と防塵ゴム１３の斜視図を示し、図７は防塵ゴム１３の断面図を示す。また、図８（ａ）は固定鏡筒１２と防塵ゴム１３の側面図を示し、図８（ｂ）はその断面図（断面Ａ−Ａ）を示す。図９は図８（ｂ）の部分拡大図を示す。防塵ゴム１３は開口部１３ｂを有したゴム製の部材であり、４箇所の係合穴１３ａ（被係合部）を有する。係合穴１３ａが固定鏡筒１２の側面に設けた４箇所の係合部１２ａに係合することによって、防塵ゴム１３は固定鏡筒１２に固定される。防塵ゴム１３は、略四角錐台形状の第１の封止部１３ｃと、撮影レンズユニット１１の光軸に直交する方向に延設して形成された２箇所の略矩形平板形状の第２の封止部１３ｄを有する。第１の封止部１３ｃおよび第２の封止部１３ｄの厚みは、防塵ゴム１３のうちの第１の封止部１３ｃおよび第２の封止部１３ｄ以外の箇所の厚みよりも薄く作られている。第１の封止部１３ｃと第２の封止部１３ｄの厚みは同じであっても、一方が他方より厚い構成であってもよい。第２の封止部１３ｄの形状は、上述した略矩形平板形状に限定されるものではなく、撮影レンズユニット１１の光軸方向に突出する凸形状であればよい。 Next, the action of the dustproof rubber 13 in this embodiment will be described. FIG. 6 shows a perspective view of the fixed lens barrel 12 and the dustproof rubber 13, and FIG. 7 shows a cross-sectional view of the dustproof rubber 13. Further, FIG. 8A shows a side view of the fixed lens barrel 12 and the dustproof rubber 13, and FIG. 8B shows a cross-sectional view (cross section AA) thereof. FIG. 9 shows a partially enlarged view of FIG. 8 (b). The dustproof rubber 13 is a rubber member having an opening 13b, and has four engaging holes 13a (engaged portions). The dustproof rubber 13 is fixed to the fixed lens barrel 12 by engaging the engaging holes 13a with the four engaging portions 12a provided on the side surface of the fixed lens barrel 12. The dustproof rubber 13 has a first sealing portion 13c having a substantially quadrangular pyramid shape and a second substantially rectangular flat plate shape formed by extending in a direction orthogonal to the optical axis of the photographing lens unit 11. It has a sealing portion 13d. The thickness of the first sealing portion 13c and the second sealing portion 13d is made thinner than the thickness of the portion other than the first sealing portion 13c and the second sealing portion 13d of the dustproof rubber 13. ing. The thickness of the first sealing portion 13c and the second sealing portion 13d may be the same, or one of them may be thicker than the other. The shape of the second sealing portion 13d is not limited to the substantially rectangular flat plate shape described above, and may be a convex shape protruding in the optical axis direction of the photographing lens unit 11.
防塵ゴム１３は係合穴１３ａ周辺を光軸方向被写体側に延在した延在部１３ｅ（図９（ａ））を有しており、固定鏡筒１２の外形１２ｅからはみ出るまで延在される（延在部の端部は、固定鏡筒の端部より外側に位置する）。その結果、延在部１３ｅを掴むことで、係合穴１３ａを係合部１２ａに係合させて防塵ゴム１３を固定鏡筒１２に取り付けたり取り外したりする際の組立作業を容易に行うことが可能となる。ここでは、固定鏡筒１２の外形１２ｅからはみ出るまで延在部１３ｅを延在させているが、係合部１２ａと係合穴１３ａとの取り付け取り外しがし易い形状であればよく、例えば、延在部１３ｅ近傍に固定鏡筒１２に凹形状１２ｆ（図９（ｂ））があってもよく、もしくは、延在部１３ｅにアーチ形状１３ｆ（図９（ｃ））または凸形状１３ｇ（図９（ｄ））があってもよい。 The dustproof rubber 13 has an extending portion 13e (FIG. 9A) extending around the engaging hole 13a toward the subject in the optical axis direction, and extends until it protrudes from the outer shape 12e of the fixed lens barrel 12. (The end of the extension is located outside the end of the fixed lens barrel). As a result, by grasping the extending portion 13e, it is possible to easily perform the assembly work when the engaging hole 13a is engaged with the engaging portion 12a and the dustproof rubber 13 is attached to or detached from the fixed lens barrel 12. It will be possible. Here, the extending portion 13e is extended until it protrudes from the outer shape 12e of the fixed lens barrel 12, but the shape may be such that the engaging portion 12a and the engaging hole 13a can be easily attached and detached. The fixed lens barrel 12 may have a concave shape 12f (FIG. 9 (b)) in the vicinity of the existing portion 13e, or the extending portion 13e may have an arch shape 13f (FIG. 9 (c)) or a convex shape 13 g (FIG. 9). (D)) may be present.
図１０〜図１３は、フィルタベース１６とフィルタ保持枠１７を固定鏡筒１２に組み込む際のシーケンスを示した図である。図１０はフィルタベース１６とフィルタ保持枠１７の組み込み開始直後の状態を示す図である。固定鏡筒１２には防塵ゴム１３が取り付けられ、撮像素子基板１４が複数の接着部１２ｃで接着固定されている。なお、本実施例では撮像素子基板１４は固定鏡筒１２に接着固定されているが、螺子で固定されていても、あるいは弾性部材で付勢されて固定されていてもよい。この状態で、固定鏡筒１２の側面に設けた開口部１２ｂより、赤外カットフィルタ１８とダミーガラス１９を固定したフィルタ保持枠１７とフィルタベース１６を図中矢印で示す光軸直交方向に挿入する。 10 to 13 are views showing a sequence when the filter base 16 and the filter holding frame 17 are incorporated into the fixed lens barrel 12. FIG. 10 is a diagram showing a state immediately after the start of assembling the filter base 16 and the filter holding frame 17. A dustproof rubber 13 is attached to the fixed lens barrel 12, and the image sensor substrate 14 is adhesively fixed by a plurality of adhesive portions 12c. In this embodiment, the image sensor substrate 14 is adhesively fixed to the fixed lens barrel 12, but it may be fixed by a screw or may be urged and fixed by an elastic member. In this state, the filter holding frame 17 and the filter base 16 on which the infrared cut filter 18 and the dummy glass 19 are fixed are inserted from the opening 12b provided on the side surface of the fixed lens barrel 12 in the direction orthogonal to the optical axis indicated by the arrow in the figure. To do.
図１１はフィルタベース１６とフィルタ保持枠１７を固定鏡筒１２にさらに挿入した状態を示す図である。このとき、フィルタベース１６に防塵ゴム１３の一方の第２の封止部１３ｄが当接し、第２の封止部１３ｄが図中矢印で示す光軸に直交する方向に弾性変形により撓んで摺接する。このため、第２の封止部１３ｄは、図中矢印とは反対の方向に作用する力をフィルタベース１６に作用させる。また、防塵ゴム１３はフィルタベース１６に封止部１３ｄを介して光軸方向撮像素子側に押圧されることになるが、固定鏡筒１２とは係合穴１３ａによって係合されている為、光軸方向撮像素子側に移動することがなく、その結果封止部材１３に当接している撮像素子基板１４に有害な負荷をかけることがなく、撮像素子基板１４の接着ずれを防止できる。また、この効果は前述したように第２の封止部１３ｄの厚さを薄くすることで、さらに発揮できる。 FIG. 11 is a diagram showing a state in which the filter base 16 and the filter holding frame 17 are further inserted into the fixed lens barrel 12. At this time, one second sealing portion 13d of the dustproof rubber 13 comes into contact with the filter base 16, and the second sealing portion 13d bends and slides in the direction orthogonal to the optical axis indicated by the arrow in the figure due to elastic deformation. Get in touch. Therefore, the second sealing portion 13d exerts a force acting in the direction opposite to the arrow in the drawing on the filter base 16. Further, the dustproof rubber 13 is pressed against the filter base 16 via the sealing portion 13d toward the image sensor in the optical axis direction, but since it is engaged with the fixed lens barrel 12 by the engaging hole 13a, It does not move to the image sensor side in the optical axis direction, and as a result, no harmful load is applied to the image sensor substrate 14 in contact with the sealing member 13, and the adhesion deviation of the image sensor substrate 14 can be prevented. Further, this effect can be further exerted by reducing the thickness of the second sealing portion 13d as described above.
図１２はフィルタベース１６とフィルタ保持枠１７を固定鏡筒１２にさらに挿入した状態を示す図である。このとき、フィルタベース１６に防塵ゴム１３の一方の第２の封止部１３ｄに加えて、他方の第２の封止部１３ｄも当接し、２箇所の第２の封止部１３ｄが図中矢印で示す光軸直交方向に撓んで摺接する。 FIG. 12 is a diagram showing a state in which the filter base 16 and the filter holding frame 17 are further inserted into the fixed lens barrel 12. At this time, in addition to the one second sealing portion 13d of the dustproof rubber 13, the other second sealing portion 13d also comes into contact with the filter base 16, and the two second sealing portions 13d are shown in the drawing. It bends in the direction orthogonal to the optical axis indicated by the arrow and slides in contact.
図１３はフィルタベース１６とフィルタ保持枠１７の固定鏡筒１２への挿入が完了した状態を示す図である。挿入完了時には、フィルタベース１６の撮像素子側に設置した複数の当接部１６ａが固定鏡筒１２の開口部の内面と当接することによって、フィルタベース１６およびフィルタ保持枠１７が図中矢印で示す光軸方向被写体側に移動する。それによって、フィルタベース１６と固定鏡筒１２の側面の被写体側の隙間１２ｄがほぼ無くなり、隙間１２ｄからの異物の進入を防止すると共に、フィルタ保持枠１７が固定鏡筒１２とフィルタベース１６との間でガタつくことなく良好に摺動できるようになる。このとき、フィルタベース１６と固定鏡筒１２の側面の撮像素子側に生じた隙間１２ｅから異物が進入したとしても防塵ゴム１３の第２の封止部１３ｄによって封止される。また、固定鏡筒１２と撮像素子基板１４との間から異物が進入したとしても防塵ゴム１３の第１の封止部１３ｃで封止される。このように、防塵ゴム１３は、撮像素子１５の受光面の周囲を包囲し、これにより、異物が撮像素子１５の受光面上に到達することがない。 FIG. 13 is a diagram showing a state in which the filter base 16 and the filter holding frame 17 have been inserted into the fixed lens barrel 12. When the insertion is completed, the plurality of contact portions 16a installed on the image sensor side of the filter base 16 come into contact with the inner surface of the opening of the fixed lens barrel 12, so that the filter base 16 and the filter holding frame 17 are indicated by arrows in the drawing. Moves to the subject side in the optical axis direction. As a result, the gap 12d on the subject side of the side surface of the filter base 16 and the fixed lens barrel 12 is almost eliminated to prevent foreign matter from entering through the gap 12d, and the filter holding frame 17 is formed between the fixed lens barrel 12 and the filter base 16. You will be able to slide well without rattling between them. At this time, even if foreign matter enters through the gap 12e formed on the side surface of the filter base 16 and the fixed lens barrel 12 on the image sensor side, the dustproof rubber 13 is sealed by the second sealing portion 13d. Further, even if foreign matter enters between the fixed lens barrel 12 and the image sensor substrate 14, the dustproof rubber 13 is sealed by the first sealing portion 13c. In this way, the dustproof rubber 13 surrounds the periphery of the light receiving surface of the image sensor 15, so that foreign matter does not reach the light receiving surface of the image sensor 15.
以下、図１４〜図１７を参照して、本発明の第２の実施例による撮像装置について説明する。第１の実施例と同一部分には同一符号を付し、相違する点のみを説明する。 Hereinafter, the imaging apparatus according to the second embodiment of the present invention will be described with reference to FIGS. 14 to 17. The same parts as those in the first embodiment are designated by the same reference numerals, and only the differences will be described.
図１４はレンズ鏡筒ユニット１０５の断面図を示し、図１５は防塵ゴム１１３の斜視図を示し、図１６は防塵ゴム１１３の断面図を示す。図１７は防塵ゴム１１３の断面図の部分拡大図を示す。実施例１と相違する点は防塵ゴムの形状のみである。 FIG. 14 shows a cross-sectional view of the lens barrel unit 105, FIG. 15 shows a perspective view of the dust-proof rubber 113, and FIG. 16 shows a cross-sectional view of the dust-proof rubber 113. FIG. 17 shows a partially enlarged view of a cross-sectional view of the dustproof rubber 113. The only difference from Example 1 is the shape of the dustproof rubber.
防塵ゴム１１３は開口部１１３ｂを有したゴム製の部材であり、４箇所の係合穴１１３ａを有する。係合穴１１３ａは固定鏡筒１２の側面に設けた４箇所の係合部１２ａに係合することによって、防塵ゴム１１３が固定鏡筒１２に固定される。防塵ゴム１１３は、略四角錐台形状の第１の封止部１１３ｃと、開口形状が略矩形である角型蛇腹形状をした第２の封止部１１３ｄを有する。第１の封止部１１３ｃおよび第２の封止部１１３ｄの厚みは、防塵ゴム１１３のうちの第１の封止部１１３ｃおよび第２の封止部１１３ｄ以外の箇所よりも薄く作られている。以下、フィルタベース１６とフィルタ保持枠１７を固定鏡筒１２に組み込む際の防塵ゴム１１３の作用については実施例１と同様であり、防塵ゴム１１３の第１の封止部１１３ｃおよび第２の封止部１１３ｄにより、異物が撮像素子１５の受光面上に到達することがない。なお、防塵ゴム１１３の第２の封止部１１３ｄは開口部１１３ｂを包囲する形状の弾性体であれば本実施形態に限られるものではない。 The dustproof rubber 113 is a rubber member having an opening 113b, and has four engaging holes 113a. The dustproof rubber 113 is fixed to the fixed lens barrel 12 by engaging the engaging holes 113a with the four engaging portions 12a provided on the side surface of the fixed lens barrel 12. The dustproof rubber 113 has a first sealing portion 113c having a substantially quadrangular pyramid shape and a second sealing portion 113d having a square bellows shape having a substantially rectangular opening shape. The thickness of the first sealing portion 113c and the second sealing portion 113d is made thinner than the portions of the dustproof rubber 113 other than the first sealing portion 113c and the second sealing portion 113d. .. Hereinafter, the action of the dustproof rubber 113 when incorporating the filter base 16 and the filter holding frame 17 into the fixed lens barrel 12 is the same as in the first embodiment, and the first sealing portion 113c and the second sealing portion 113c of the dustproof rubber 113 are sealed. Due to the stop 113d, foreign matter does not reach the light receiving surface of the image sensor 15. The second sealing portion 113d of the dustproof rubber 113 is not limited to this embodiment as long as it is an elastic body having a shape surrounding the opening 113b.
また、第２の封止部１１３ｄはフィルタベース１６と摺接する開口部の近傍１１３ｅの厚みｔ１が第２の封止部１１３ｄの厚みｔ２よりも厚く作られている。これにより、フィルタベース１６とフィルタ保持枠１７を固定鏡筒１２に組み込む際に、第２の封止部１１３ｄの開口部近傍１１３ｅがフィルタベース１６と摺れることによって捲れ上がり、フィルタベース１６との間に隙間ができてしまうことがない。また、本実施例ではフィルタベース１６に、ゴミ封止用にダミーガラス１１６を固定しているが、フィルタベース１６とフィルタ保持枠１７を固定鏡筒１２に組み込む際に、第２の封止部１１３ｄの開口部近傍１１３ｅが撓んでダミーガラス１１６と接触することによりダミーガラス１１６を汚損することがない。なお、第２の封止部１１３ｄの開口部近傍１１３ｅの４辺のうち、第２の封止部１１３ｄの厚みより厚くするのは、少なくともフィルタベース１６の挿入方向に対して直交する２辺であればよい。 Further, the thickness t1 of the second sealing portion 113d near the opening in sliding contact with the filter base 16 is made thicker than the thickness t2 of the second sealing portion 113d. As a result, when the filter base 16 and the filter holding frame 17 are incorporated into the fixed lens barrel 12, the 113e near the opening of the second sealing portion 113d is rolled up by sliding with the filter base 16 and is rolled up with the filter base 16. There is no gap between them. Further, in this embodiment, the dummy glass 116 is fixed to the filter base 16 for dust sealing, but when the filter base 16 and the filter holding frame 17 are incorporated into the fixed lens barrel 12, the second sealing portion is used. The dummy glass 116 is not soiled by the 113e near the opening of the 113d bending and coming into contact with the dummy glass 116. Of the four sides of 113e near the opening of the second sealing portion 113d, at least two sides orthogonal to the insertion direction of the filter base 16 are thicker than the thickness of the second sealing portion 113d. All you need is.
以上により、フィルタを光路中に挿抜するフィルタ切り替え機構をレンズ鏡筒の側面に設けた開口部から挿入する構成において、異物が撮像素子の受光面上に付着することを防止することが可能な撮像装置を提供することができる。 As described above, in the configuration in which the filter switching mechanism for inserting and removing the filter into the optical path is inserted through the opening provided on the side surface of the lens barrel, it is possible to prevent foreign matter from adhering to the light receiving surface of the image sensor. The device can be provided.
以上、本発明の好ましい実施形態について説明したが、本発明はこれらの実施形態に限定されず、その要旨の範囲内で種々の変形及び変更が可能である。 Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications and modifications can be made within the scope of the gist thereof.
１３，１１３：防塵ゴム（封止部材）
１３ｃ：第１の封止部
１３ｄ：第２の封止部
１４：撮像素子基板（基板）
１５：撮像素子
１６：フィルタベース（保持部材）
１７：フィルタ保持枠
１８：赤外カットフィルタ（光学部材）
13,113: Dustproof rubber (sealing member)
13c: First sealing portion 13d: Second sealing portion 14: Image sensor substrate (board)
15: Image sensor 16: Filter base (holding member)
17: Filter holding frame 18: Infrared cut filter (optical member)
Claims (18)
光路中に挿抜可能に光学部材を保持し、レンズ鏡筒と前記撮像素子の間に保持される保持部材と、
前記光学部材より前記撮像素子側に設けられ、前記撮像素子の受光面の周囲を包囲する封止部材と、を有し、
前記封止部材は、前記基板と当接する第１の封止部と、前記保持部材と当接する第２の封止部とを備えることを特徴とする撮像装置。 The substrate that holds the image sensor and
A holding member that holds the optical member so that it can be inserted and removed in the optical path and is held between the lens barrel and the image sensor.
It has a sealing member provided on the image sensor side of the optical member and surrounding the light receiving surface of the image sensor.
The image pickup apparatus, wherein the sealing member includes a first sealing portion that comes into contact with the substrate and a second sealing portion that comes into contact with the holding member.
前記第２の封止部は、前記レンズ鏡筒と前記保持部材との間の隙間を封止することを特徴とする請求項１に記載の撮像装置。 The first sealing portion seals the gap between the substrate and the lens barrel.
The imaging device according to claim 1, wherein the second sealing portion seals a gap between the lens barrel and the holding member.
前記延在部の端部は、前記レンズ鏡筒の端部より外側に位置することを特徴とする請求項３に記載に撮像装置。 At least one of the plurality of engaged portions has an extending portion extending in the optical axis direction of the photographing lens held by the lens barrel.
The imaging device according to claim 3, wherein the end portion of the extending portion is located outside the end portion of the lens barrel.
前記延在部は、凸形状を有することを特徴とする請求項３に記載に撮像装置。 At least one of the plurality of engaged portions has an extending portion extending in the optical axis direction of the photographing lens held by the lens barrel.
The imaging device according to claim 3, wherein the extending portion has a convex shape.
前記延在部は、アーチ形状を有することを特徴とする請求項３に記載に撮像装置。 At least one of the plurality of engaged portions has an extending portion extending in the optical axis direction of the photographing lens held by the lens barrel.
The imaging device according to claim 3, wherein the extending portion has an arch shape.
前記レンズ鏡筒は、前記延在部近傍に、凹形状を有することを特徴とする請求項３に記載に撮像装置。 At least one of the plurality of engaged portions has an extending portion extending in the optical axis direction of the photographing lens held by the lens barrel.
The imaging device according to claim 3, wherein the lens barrel has a concave shape in the vicinity of the extending portion.
前記レンズ鏡筒に保持される撮影レンズの光軸方向に直交する方向に延設して形成され、前記光軸方向に突出する凸形状であり、
弾性変形することで前記保持部材と当接することを特徴とする請求項１から７のいずれか一項に記載の撮像装置。 The second sealing portion is
It has a convex shape that extends in a direction orthogonal to the optical axis direction of the photographing lens held in the lens barrel and projects in the optical axis direction.
The imaging device according to any one of claims 1 to 7, wherein the image pickup apparatus comes into contact with the holding member by being elastically deformed.
Priority Applications (10)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010267465.9A CN111812915B (en) | 2019-04-10 | 2020-04-08 | Image pickup apparatus |
| EP20168643.3A EP3722857A1 (en) | 2019-04-10 | 2020-04-08 | Image-capturing apparatus |
| US16/842,803 US11503191B2 (en) | 2019-04-10 | 2020-04-08 | Image-capturing apparatus with holding member for holding optical member |
| CN202010267468.2A CN111812916B (en) | 2019-04-10 | 2020-04-08 | Image pickup apparatus |
| KR1020200042495A KR20200119734A (en) | 2019-04-10 | 2020-04-08 | Optical apparatus |
| CN202010267507.9A CN111812917A (en) | 2019-04-10 | 2020-04-08 | Optical device |
| EP20168642.5A EP3722856A1 (en) | 2019-04-10 | 2020-04-08 | Image-capturing apparatus |
| EP20168641.7A EP3722872A1 (en) | 2019-04-10 | 2020-04-08 | Optical apparatus |
| US16/843,258 US11178321B2 (en) | 2019-04-10 | 2020-04-08 | Optical apparatus |
| US16/843,283 US11196905B2 (en) | 2019-04-10 | 2020-04-08 | Image-capturing apparatus for reducing a number of components of an optical element switching mechanism |
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