JP2015152882A - Camera and driving support device - Google Patents

Camera and driving support device Download PDF

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JP2015152882A
JP2015152882A JP2014029228A JP2014029228A JP2015152882A JP 2015152882 A JP2015152882 A JP 2015152882A JP 2014029228 A JP2014029228 A JP 2014029228A JP 2014029228 A JP2014029228 A JP 2014029228A JP 2015152882 A JP2015152882 A JP 2015152882A
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JP6274411B2 (en
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加藤　弘典
Hironori Kato
弘典 加藤
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Fujitsu General Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a camera capable of removing water droplets quickly more than before.SOLUTION: A camera 16 includes: a lens having a lens surface 25; and a housing 21 housing the lens and defining an opening 22 to expose the lens surface 25. In the housing 21, a drainage channel 26 is defined below an optical axis 17 of the lens in a gravity direction and inside a circle 27 centering the optical axis 17 defined by the edge of the opening 22.

Description

本発明は、例えば車載カメラや監視カメラといった屋外に設置されるカメラに関する。   The present invention relates to a camera installed outdoors such as an in-vehicle camera or a surveillance camera.

車載カメラや監視カメラといった屋外に設置されるカメラは一般に知られる。屋外では雨水や水蒸気によってレンズのレンズ面に水滴が付着することがある。水滴は撮像画像をぼかす。認識に十分な画像が得られない。水滴は速やかに除去されることが望まれる。   Cameras installed outdoors such as in-vehicle cameras and surveillance cameras are generally known. In the outdoors, raindrops or water vapor may cause water droplets to adhere to the lens surface. Water drops blur the captured image. An image sufficient for recognition cannot be obtained. It is desirable that water droplets be removed promptly.

特許４７２６６９８号Japanese Patent No. 4726698

特許文献１に開示されるように、水滴の除去にあたって溝といった排水路が提案される。排水路は環状の押さえ部材の表面に刻まれる。押さえ部材の円形の開口にレンズのレンズ面は露出する。円形の開口の縁から外側に向かって排水路は延びる。しかしながら、水滴の自重や車両の振動程度では水滴は容易にレンズ面の中央からレンズ面の縁まで移動しない。水滴の除去が促進される術が望まれる。   As disclosed in Patent Document 1, a drainage channel such as a groove is proposed for removing water droplets. The drainage channel is carved on the surface of the annular pressing member. The lens surface of the lens is exposed in the circular opening of the pressing member. The drainage channel extends outward from the edge of the circular opening. However, the water droplet does not easily move from the center of the lens surface to the edge of the lens surface by the weight of the water droplet or the vibration of the vehicle. A technique that promotes removal of water droplets is desired.

本発明のいくつかの態様によれば、従来に比べて速やかに水滴を除去することができるカメラは提供されることができる。   According to some aspects of the present invention, a camera capable of removing water droplets more quickly than in the past can be provided.

本発明の一態様は、レンズ面を有するレンズと、前記レンズを収容し、前記レンズ面を露出させる開口を有する筐体とを備え、前記筐体には、前記レンズ面に付着した水滴を排出する排水路が区画され、前記排水路の位置は、重力方向に前記レンズの光軸よりも下方で、前記開口の縁で規定される光軸を中心とした円の内側であるカメラに関する。   One embodiment of the present invention includes a lens having a lens surface, and a housing that houses the lens and has an opening that exposes the lens surface. The housing discharges water droplets attached to the lens surface. The drainage channel is defined, and the position of the drainage channel relates to a camera that is below the optical axis of the lens in the direction of gravity and inside a circle centered on the optical axis defined by the edge of the opening.

こうしたカメラによれば、従来に比べて、排水路の入口はレンズ面の中心に近づくことができる。したがって、これまでよりもレンズ面の中央に近い位置でレンズ面上の水滴は排水路に進入することができる。こうしてレンズ面上の水滴は速やかにレンズ面上から除去されることができる。   According to such a camera, the entrance of the drainage channel can be closer to the center of the lens surface than in the past. Therefore, water droplets on the lens surface can enter the drainage channel at a position closer to the center of the lens surface than before. Thus, water droplets on the lens surface can be quickly removed from the lens surface.

カメラは、重力方向に前記光軸の下方で、前記開口の縁から前記円の内側まで前記レンズ面に沿って延びる第１片と、重力方向に前記光軸の下方で、前記開口の縁から前記円の内側まで前記レンズ面に沿って延び、前記レンズ面上で前記第１片との間にスリットを形成する第２片とを備えてもよい。ここでは、排水路はスリットで形成される。スリットの働きでレンズ面上に排水路の入口は形成される。その結果、レンズ面には段差なく排水路の入口が接続される。こうして排水路への水滴の進入は促進される。   The camera includes a first piece extending along the lens surface from the edge of the opening to the inside of the circle below the optical axis in the direction of gravity, and from the edge of the opening below the optical axis in the direction of gravity. You may provide the 2nd piece which extends along the said lens surface to the inner side of the said circle, and forms a slit between the said 1st piece on the said lens surface. Here, the drainage channel is formed by a slit. The entrance of the drainage channel is formed on the lens surface by the action of the slit. As a result, the entrance of the drainage channel is connected to the lens surface without a step. Thus, the entry of water droplets into the drainage channel is promoted.

カメラでは、前記スリットの幅は前記光軸から重力方向に遠ざかるにつれて増大すればよい。毛細管現象の働きでレンズ面上の水滴は上端の入口からスリットの排水路に取り込まれる。水は排水路内に留まることなく流れ落ちる。   In the camera, the width of the slit may increase as the distance from the optical axis increases in the direction of gravity. Capillary action causes water droplets on the lens surface to be taken into the slit drainage channel from the top entrance. Water flows down without staying in the drainage channel.

前記筐体は、前記レンズ面の反対側から前記レンズを支持する筐体本体と、前記レンズ面の側から前記レンズに接触して前記開口を区画し、前記筐体本体との間に前記レンズを挟み込む環状の押さえ部材とを備えてもよい。   The housing has a housing main body that supports the lens from the opposite side of the lens surface, and the lens comes into contact with the lens from the lens surface side to define the opening, and the lens is between the housing main body and the lens body. And an annular pressing member that sandwiches.

カメラは運転支援装置に利用されることができる。このとき、運転支援装置はカメラを備えればよい。カメラは運転支援装置に前述の技術的効果をもたらすことができる。   The camera can be used in a driving support device. At this time, the driving support device may include a camera. The camera can bring about the technical effects described above to the driving assistance device.

以上のように本発明の一態様によれば、従来に比べて速やかに水滴を除去することができるカメラは提供される。   As described above, according to one embodiment of the present invention, a camera capable of removing water droplets more quickly than in the past is provided.

運転支援装置を備える自動車の構造を概略的に示す斜視図である。It is a perspective view which shows roughly the structure of a motor vehicle provided with a driving assistance device. 第１実施形態に係るカメラの拡大斜視図である。It is an expansion perspective view of the camera concerning a 1st embodiment. カメラの拡大正面図である。It is an enlarged front view of a camera. イメージサークルと撮像範囲との関係を示す概念図である。It is a conceptual diagram which shows the relationship between an image circle and an imaging range. 図３の５−５線に沿った水平断面図である。FIG. 5 is a horizontal sectional view taken along line 5-5 in FIG. 水飛沫に曝されたカメラの拡大正面図である。It is an enlarged front view of the camera exposed to water splash. スリットに流れ込む水滴の様子を示すカメラの拡大正面図である。It is an enlarged front view of the camera which shows the mode of the water droplet which flows into a slit. 第２実施形態に係るカメラの拡大分解斜視図である。It is an expansion exploded perspective view of the camera concerning a 2nd embodiment. 図５に対応し、第２実施形態に係るカメラの水平断面図である。FIG. 6 is a horizontal sectional view of the camera according to the second embodiment corresponding to FIG. 5.

以下、添付図面を参照しつつ本発明の一実施形態を説明する。   Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

（１）自動車および運転支援装置の構成
図１は一実施形態に係る自動車１１を概略的に示す。自動車１１の車体１２には運転支援装置１３が搭載される。運転支援装置１３はナビゲーション装置１４を備える。ナビゲーション装置１４はディスプレイパネル１５を有する。ディスプレイパネル１５は例えば自動車１１のダッシュボードに組み込まれることができる。ディスプレイパネル１５の表示画面には地図その他の情報が表示されることができる。 (1) Configuration of Automobile and Driving Support Device FIG. 1 schematically shows an automobile 11 according to an embodiment. A driving support device 13 is mounted on the vehicle body 12 of the automobile 11. The driving support device 13 includes a navigation device 14. The navigation device 14 has a display panel 15. The display panel 15 can be incorporated in the dashboard of the automobile 11, for example. A map and other information can be displayed on the display screen of the display panel 15.

運転支援装置１３はカメラ１６を備える。カメラ１６は例えば車体１２の後部に設置される。カメラ１６はいわゆる屋外に設置される。カメラ１６は例えば自動車１１のリアバンパーの上方に取り付けられる。カメラ１６の光軸１７は例えば水平面に対して所定の角度に設定される。光軸１７は、自動車１１から後方に離れるにつれて自動車１１が置かれている地面に近づくように傾斜する。カメラ１６は車体１２後方の被写体を撮像する。ここでは、光軸１７に対して水平方向および垂直方向にいずれも少なくとも±９０°の画角範囲で被写体の撮像画像は取得される。   The driving support device 13 includes a camera 16. The camera 16 is installed in the rear part of the vehicle body 12, for example. The camera 16 is installed outdoors. The camera 16 is attached above the rear bumper of the automobile 11, for example. The optical axis 17 of the camera 16 is set at a predetermined angle with respect to the horizontal plane, for example. The optical axis 17 is inclined so as to approach the ground on which the automobile 11 is placed as it moves backward from the automobile 11. The camera 16 images a subject behind the vehicle body 12. Here, a captured image of the subject is acquired in an angle of view range of at least ± 90 ° in both the horizontal and vertical directions with respect to the optical axis 17.

カメラ１６は撮像画像に基づき画像信号を生成する。画像信号では、ディスプレイパネル１５の表示画面に表示される表示画像が特定される。カメラ１６はナビゲーション装置１４に接続される。ナビゲーション装置１４にはカメラ１６から画像信号が供給される。ディスプレイパネル１５の表示画面には画像信号に基づき車体１２後方の映像が映し出されることができる。この運転支援装置１３では、例えば駐車場で駐車スペースに後退走行で進入する際に運転者は車体１２の後方の様子を確認することができる。こうして運転支援装置１３は運転者の後方確認を支援することができる。   The camera 16 generates an image signal based on the captured image. In the image signal, a display image displayed on the display screen of the display panel 15 is specified. The camera 16 is connected to the navigation device 14. An image signal is supplied from the camera 16 to the navigation device 14. On the display screen of the display panel 15, an image behind the vehicle body 12 can be displayed based on the image signal. In the driving support device 13, for example, the driver can check the state behind the vehicle body 12 when entering the parking space in a parking lot by reverse running. In this way, the driving support device 13 can support the driver's backward confirmation.

（２）第１実施形態に係るカメラの構造
図２は第１実施形態に係るカメラ１６を概略的に示す。カメラ１６は筐体２１を備える。カメラ１６の前面で筐体２１には開口２２が区画される。開口２２の輪郭は、正面視で少なくとも左右両側で光軸１７回りの円弧２３を描く。ここでは、光軸１７を含んで水平方向に広がる仮想平面ＨＰより上半分を含んで１８０度よりも大きい中心角で円弧２３は広がる。開口２２の輪郭は筐体２１の縁でかたどられる。 (2) Structure of Camera According to First Embodiment FIG. 2 schematically shows the camera 16 according to the first embodiment. The camera 16 includes a housing 21. An opening 22 is defined in the housing 21 in front of the camera 16. The outline of the opening 22 draws an arc 23 around the optical axis 17 at least on both the left and right sides in front view. Here, the arc 23 extends at a central angle greater than 180 degrees including the upper half of the virtual plane HP that extends in the horizontal direction including the optical axis 17. The outline of the opening 22 is modeled by the edge of the housing 21.

筐体２１にはレンズアセンブリ２４が収容される。レンズアセンブリ２４は最前面にレンズ面２５を規定する。レンズアセンブリ２４は複数のレンズで形成される。レンズアセンブリ２４は魚眼レンズまたは広角レンズを提供する。   A lens assembly 24 is accommodated in the housing 21. The lens assembly 24 defines a lens surface 25 at the forefront. The lens assembly 24 is formed of a plurality of lenses. The lens assembly 24 provides a fisheye lens or a wide angle lens.

筐体２１には排水路２６が区画される。図３から明らかなように、排水路２６は、光軸１７を含んで水平方向に広がる仮想平面ＨＰよりも重力方向に下方で、開口２２の縁で規定される光軸１７を中心とした円２７よりも当該円２７の内側に配置される。ここでは、排水路２６は光軸１７を含む鉛直面ＶＰに沿って延びる。   A drainage channel 26 is defined in the housing 21. As is clear from FIG. 3, the drainage channel 26 is a circle centered on the optical axis 17 defined by the edge of the opening 22 below the virtual plane HP including the optical axis 17 and extending in the horizontal direction in the gravity direction. It is arranged inside the circle 27 rather than 27. Here, the drainage channel 26 extends along the vertical plane VP including the optical axis 17.

排水路２６の区画にあたって筐体２１には第１片３１および第２片３２が形成される。第１片３１は、重力方向に仮想平面ＨＰよりも下方で、開口２２の縁から円２７の内側までレンズ面２５に沿って延びる。第２片３２は、同様に、重力方向に仮想平面ＨＰよりも下方で、開口２２の縁から円２７の内側までレンズ面２５に沿って延びる。第１片３１および第２片３２の間に光軸１７を含む鉛直面ＶＰに沿ってスリット３３が形成される。スリット３３はレンズ面２５上に排水路２６を形成する。スリット３３の上端３３ａは水に対して毛細管現象が発生する。スリット３３の幅は光軸１７から遠ざかるにつれて徐々に増大する。第１片３１および第２片３２の上縁は開口２２の縁からスリット３３に向かって下降する。上縁の傾斜は開口２２の縁からスリット３３に向かって連続する。スリット３３はレンズ面２５上の上端３３ａから始まって円２７の下方まで延びる。   A first piece 31 and a second piece 32 are formed in the casing 21 when the drainage channel 26 is partitioned. The first piece 31 extends along the lens surface 25 from the edge of the opening 22 to the inside of the circle 27 below the virtual plane HP in the direction of gravity. Similarly, the second piece 32 extends along the lens surface 25 from the edge of the opening 22 to the inside of the circle 27 below the virtual plane HP in the direction of gravity. A slit 33 is formed between the first piece 31 and the second piece 32 along the vertical plane VP including the optical axis 17. The slit 33 forms a drainage channel 26 on the lens surface 25. The upper end 33a of the slit 33 causes capillary action with respect to water. The width of the slit 33 gradually increases as the distance from the optical axis 17 increases. The upper edges of the first piece 31 and the second piece 32 descend from the edge of the opening 22 toward the slit 33. The inclination of the upper edge continues from the edge of the opening 22 toward the slit 33. The slit 33 starts from the upper end 33 a on the lens surface 25 and extends to the lower side of the circle 27.

図４に示されるように、カメラ１６ではレンズアセンブリ２４が形成するイメージサークル３５内に撮像素子の撮像範囲３６は収まる。撮像範囲３６は例えばディスプレイパネル１５の表示画面の形状（アスペクト比）に応じて決定されればよい。このとき、第１片３１および第２片３２の投影像３７、３８は、イメージサークル３５の内側に位置するものの、撮像範囲３６の外側に留まる。イメージサークル３５は開口２２の縁で規定される円２７に対応する。撮像範囲３６は撮像素子の輪郭に一致する。   As shown in FIG. 4, in the camera 16, the imaging range 36 of the imaging element is within the image circle 35 formed by the lens assembly 24. The imaging range 36 may be determined according to the shape (aspect ratio) of the display screen of the display panel 15, for example. At this time, the projection images 37 and 38 of the first piece 31 and the second piece 32 are located inside the image circle 35, but remain outside the imaging range 36. The image circle 35 corresponds to a circle 27 defined by the edge of the opening 22. The imaging range 36 matches the contour of the imaging device.

図５に示されるように、レンズ面２５と第１片３１の上縁とは微細な間隔で向き合わせられてもよい。こうしてレンズ面２５と第１片３１の上縁との間にも毛細管現象が発生する。同様に、レンズ面２５と第２片３２の上縁とは微細な間隔で向き合わせられる。レンズ面２５と第２片３２の上縁との間にも毛細管現象が発生する。毛細管現象でレンズ面２５と第１片３１および第２片３２に蓄えられた水滴は、最終的にスリット３３に蓄えられた水滴に吸い寄せられ、排水路２６から排出される。   As shown in FIG. 5, the lens surface 25 and the upper edge of the first piece 31 may face each other with a fine interval. Thus, capillary action also occurs between the lens surface 25 and the upper edge of the first piece 31. Similarly, the lens surface 25 and the upper edge of the second piece 32 face each other at a fine interval. Capillary action also occurs between the lens surface 25 and the upper edge of the second piece 32. The water droplets stored in the lens surface 25 and the first piece 31 and the second piece 32 by capillary action are finally sucked by the water droplets stored in the slit 33 and discharged from the drainage channel 26.

雨天時や雨上がりなどに自動車１１が走行すると、路面から水飛沫が舞い上がる。図６に示されるように、水飛沫はカメラ１６の筐体２１やレンズアセンブリ２４のレンズ面２５に付着する。水飛沫が凝集すると水滴を形成する。図７に示されるように、水滴はスリット３３に集められる。スリット３３から下方に流れ落ちる。こうしてレンズ面２５から水滴は除去される。   When the automobile 11 travels in rainy weather or after rain, water splashes from the road surface. As shown in FIG. 6, water splash adheres to the housing 21 of the camera 16 and the lens surface 25 of the lens assembly 24. Water droplets form when water droplets aggregate. As shown in FIG. 7, the water droplets are collected in the slit 33. It flows downward from the slit 33. In this way, water droplets are removed from the lens surface 25.

筐体２１の第１片３１および第２片３２によれば、従来に比べて、排水路２６の入口はレンズ面２５の中心に近づくことができる。したがって、これまでよりもレンズ面２５の中央に近い位置でレンズ面２５上の水滴は排水路２６に進入することができる。こうしてレンズ面２５上の水滴は速やかにレンズ面２５上から除去されることができる。   According to the 1st piece 31 and the 2nd piece 32 of the housing | casing 21, compared with the past, the entrance of the drainage channel 26 can approach the center of the lens surface 25. FIG. Therefore, water droplets on the lens surface 25 can enter the drainage channel 26 at a position closer to the center of the lens surface 25 than before. Thus, water droplets on the lens surface 25 can be quickly removed from the lens surface 25.

カメラ１６では排水路２６はスリット３３で形成される。スリット３３はレンズ面２５上に排水路２６の入口を形成する。その結果、レンズ面２５には段差なく排水路２６の入口が接続される。こうして排水路２６への水滴の進入は促進される。   In the camera 16, the drainage channel 26 is formed by a slit 33. The slit 33 forms the entrance of the drainage channel 26 on the lens surface 25. As a result, the entrance of the drainage channel 26 is connected to the lens surface 25 without any step. Thus, the entry of water droplets into the drainage channel 26 is promoted.

前述のようにスリット３３の上端３３ａは毛細管現象を発生させる。毛細管現象の働きでレンズ面２５上の水滴は上端３３ａの入口からスリット３３の排水路２６に取り込まれる。水は排水路２６内に留まることなく流れ落ちる。   As described above, the upper end 33a of the slit 33 causes capillary action. Water droplets on the lens surface 25 are taken into the drainage channel 26 of the slit 33 from the entrance of the upper end 33a by the action of capillary action. Water flows down without staying in the drainage channel 26.

レンズ面２５上では第１片３１および第２片３２の上縁に向かって水滴は流れ落ちる。第１片３１および第２片３２の上縁は開口２２の縁からスリット３３に向かって下降することから、流れ落ちた水滴は第１片３１および第２片３２の上縁に沿ってスリット３３に向かって誘導される。こうしてレンズ面２５上から水滴の除去はさらに促進される。   On the lens surface 25, water droplets flow down toward the upper edges of the first piece 31 and the second piece 32. Since the upper edges of the first piece 31 and the second piece 32 descend from the edge of the opening 22 toward the slit 33, the water droplets that have flowed down enter the slit 33 along the upper edges of the first piece 31 and the second piece 32. Be directed towards. Thus, the removal of water droplets from the lens surface 25 is further promoted.

加えて、レンズ面２５と第１片３１および第２片３２の縁との間には毛細管構造が形成される。レンズ面２５上で水滴が十分に大きくなると、レンズ面２５上では第１片３１および第２片３２の上縁に向かって水滴は流れ落ちる。水滴は第１片３１および第２片３２の上縁に沿ってスリット３３の排水路２６に向かって誘導される。レンズ面２５上の水滴は毛細管現象の効果でスリット３３の排水路２６に集められる。こうして水滴の除去は促進される。   In addition, a capillary structure is formed between the lens surface 25 and the edges of the first piece 31 and the second piece 32. When the water droplets become sufficiently large on the lens surface 25, the water droplets flow down toward the upper edges of the first piece 31 and the second piece 32 on the lens surface 25. The water droplets are guided toward the drainage channel 26 of the slit 33 along the upper edges of the first piece 31 and the second piece 32. Water droplets on the lens surface 25 are collected in the drainage channel 26 of the slit 33 by the effect of capillary action. In this way, the removal of water droplets is promoted.

（３）第２実施形態に係るカメラの構造
図８は第２実施形態に係るカメラ１６ａを概略的に示す。カメラ１６ａは筐体４１を備える。筐体４１は筐体本体４２と押さえ部材４３とを備える。筐体本体４２にレンズアセンブリ２４は組み込まれる。カメラ１６ａの前面で筐体本体４２には窓孔４４が区画される。窓孔４４は例えば円形の輪郭を有する。窓孔４４に押さえ部材４３は嵌め合わせられる。こうして押さえ部材４３は筐体本体４２に結合される。結合においては接着剤等が用いられればよい。押さえ部材４３は環状に形成される。押さえ部材４３には前述の開口２２や第１片３１および第２片３２が形成される。 (3) Structure of Camera According to Second Embodiment FIG. 8 schematically shows a camera 16a according to the second embodiment. The camera 16 a includes a housing 41. The housing 41 includes a housing body 42 and a pressing member 43. The lens assembly 24 is incorporated in the housing body 42. A window hole 44 is defined in the housing body 42 on the front surface of the camera 16a. The window hole 44 has, for example, a circular outline. The pressing member 43 is fitted into the window hole 44. In this way, the pressing member 43 is coupled to the housing body 42. An adhesive or the like may be used for the bonding. The pressing member 43 is formed in an annular shape. The holding member 43 is formed with the opening 22, the first piece 31, and the second piece 32.

例えば図９に示されるように、レンズアセンブリ２４は複数のレンズで形成される。最前位置のレンズ４５は窓孔４４内に配置される。レンズ４５はレンズ面２５の反対側から筐体本体４２に支持される。レンズ４５の背面は周囲で窓孔４４内の段差面４６に受け止められる。押さえ部材４３が筐体本体４２に接着剤等で結合されると、押さえ部材４３は筐体本体４２との間にレンズ４５を挟み込む。レンズ４５の外周には、図示されるように、レンズ面２５に段差で接続されて、円２７の外側で押さえ部材４３に接触して押さえ部材４３の押し付け力を受け止める段差面が形成されてもよい。   For example, as shown in FIG. 9, the lens assembly 24 is formed of a plurality of lenses. The foremost lens 45 is disposed in the window hole 44. The lens 45 is supported by the housing body 42 from the opposite side of the lens surface 25. The back surface of the lens 45 is received by a step surface 46 in the window hole 44 around the lens 45. When the pressing member 43 is coupled to the housing body 42 with an adhesive or the like, the pressing member 43 sandwiches the lens 45 between the housing body 42. On the outer periphery of the lens 45, as shown in the figure, a step surface that is connected to the lens surface 25 by a step and contacts the pressing member 43 outside the circle 27 to receive the pressing force of the pressing member 43 is formed. Good.

なお、カメラ１６、１６ａは前述のように運転支援装置１３に利用されることができるだけでなく監視カメラに利用されてもよい。   The cameras 16 and 16a can be used not only for the driving support device 13 as described above but also for a monitoring camera.

１３ 運転支援装置、１６ カメラ、１６ａ カメラ、１７ 光軸、２１ 筐体、２２ 開口、２３ 円弧、２４ レンズ（レンズアセンブリ）、２５ レンズ面、２６ 排水路、２７ 円、３１ 第１片、３２ 第２片、３３ スリット、３３ａ 上端、４１ 筐体、４２ 筐体本体、４３ 押さえ部材、４５ レンズ。   13 Driving support device, 16 camera, 16a camera, 17 optical axis, 21 housing, 22 opening, 23 arc, 24 lens (lens assembly), 25 lens surface, 26 drainage channel, 27 circle, 31 first piece, 32 first 2 pieces, 33 slit, 33a upper end, 41 housing, 42 housing body, 43 pressing member, 45 lens.

Claims (6)

レンズ面を有するレンズと、
前記レンズを収容し、前記レンズ面を露出させる開口を有する筐体とを備え、
前記筐体には、前記レンズ面に付着した水滴を排出する排水路が区画され、前記排水路の位置は重力方向に前記レンズの光軸よりも下方で、かつ前記開口の縁で規定される光軸を中心とした円の内側である
ことを特徴とするカメラ。 A lens having a lens surface;
A housing that houses the lens and has an opening that exposes the lens surface;
The casing has a drainage channel for discharging water droplets attached to the lens surface, and the position of the drainage channel is defined below the optical axis of the lens in the direction of gravity and by the edge of the opening. A camera characterized by being inside a circle centered on the optical axis. 請求項１に記載のカメラにおいて、重力方向に前記光軸の下方で、前記開口の縁から前記円の内側まで前記レンズ面に沿って延びる第１片と、重力方向に前記光軸の下方で、前記開口の縁から前記円の内側まで前記レンズ面に沿って延び、前記レンズ面上で前記第１片との間にスリットを形成する第２片とを備え、前記排水路は前記スリットで形成されることを特徴とするカメラ。   2. The camera according to claim 1, wherein the first piece extends along the lens surface from the edge of the opening to the inside of the circle below the optical axis in the direction of gravity, and below the optical axis in the direction of gravity. A second piece that extends along the lens surface from the edge of the opening to the inside of the circle and forms a slit between the first piece on the lens surface, and the drainage channel is the slit. A camera characterized by being formed. 請求項２に記載のカメラにおいて、前記第１片および前記第２片はイメージサークルの中であって撮像素子の外側に投影像を形成することを特徴とするカメラ。   3. The camera according to claim 2, wherein the first piece and the second piece are in an image circle and form a projected image outside the imaging device. 請求項２または３に記載のカメラにおいて、前記スリットの幅は前記光軸から遠ざかるにつれて増大することを特徴とするカメラ。   4. The camera according to claim 2, wherein the width of the slit increases as the distance from the optical axis increases. 請求項１〜４のいずれか１項に記載のカメラにおいて、前記筐体は、前記レンズ面の反対側から前記レンズを支持する筐体本体と、前記レンズ面の側から前記レンズに接触して前記開口を区画し、前記筐体本体との間に前記レンズを挟み込む環状の押さえ部材とを備えることを特徴とするカメラ。   5. The camera according to claim 1, wherein the housing is in contact with the lens body from a side opposite to the lens surface, and a housing body that supports the lens from the lens surface side. A camera comprising: an annular pressing member that divides the opening and sandwiches the lens with the housing body. 請求項１〜５のいずれか１項に記載のカメラを備えることを特徴とする運転支援装置。   A driving support apparatus comprising the camera according to claim 1.
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