JP2004356667A

JP2004356667A - Camera casing

Info

Publication number: JP2004356667A
Application number: JP2003148298A
Authority: JP
Inventors: Kazuyoshi Nakahira; 和義中平
Original assignee: Toa Corp
Current assignee: Toa Corp
Priority date: 2003-05-26
Filing date: 2003-05-26
Publication date: 2004-12-16
Anticipated expiration: 2023-05-26
Also published as: JP4078250B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a camera casing with a falling-off preventing structure. <P>SOLUTION: In the camera casing, a chassis 13 which is formed by molding a resin, has a first face and a second face opposed to the first face, and in which a first screw receiving part 190 projecting from the second face is provided, and a container part 140 formed by molding a resin and for containing a first opening 120 fitted to the first screw receiving part 190 and wiring, are formed, and a lid 100 covering the second face of the chassis 13 is included, the first screw receiving part 190 is projected from the first opening 120, and the diameter of the first opening 120 is formed smaller than the diameter of the screw head of each of screws fitted to the first screw receiving part 190. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、建造物の天井や壁等に設置する取り付けカメラのカメラ筐体に関する。
【０００２】
【従来の技術】
図１０は従来の取り付けカメラの全体図、図１１は従来の取り付けカメラの取り付け面から見た斜視図である。従来の取り付けカメラ１は、カメラユニット等が取り付けられたシャーシ６及びカメラユニットを覆うカバーユニット５を有している。シャーシ６は、対向する２面と２面を連結する側面とを有している。シャーシ６の対向する２面は、金属で形成されており、２面のうち図１０及び図１１中下向き面は、カメラレンズなどのカメラユニットが取り付けられている。その面と対向し、シャーシ６の天井や壁２０等に接する取り付け面には、図１１に示すようにネジ受け部７０ａ、７０ｂ（ネジ受け部７０）が設けられている。このネジ受け部７０を介してネジ止めすることにより取り付けカメラ１を天井や壁２０等に設置する。また、シャーシ６の内部には、カメラ撮影用の回路基板が取り付けられている。
【０００３】
【発明が解決しようとする課題】
しかし、従来の取り付けカメラ１は、シャーシ６が金属で形成されているため、開口部の成型や立体成型などの加工が難しく成型の自由度が低い。また、金属を用いるため成型のコストや材料費がかかる。さらにシャーシ６が金属の場合は、取り付けカメラ１が電気的なノイズの影響を受け、取り付けカメラ１による撮影に障害を与える場合がある。そのためシャーシ６をアースしておく必要が生じ、機器設計段階からそのことを考慮しておかなくてはならない。しかし、シャーシ６に設けられたネジ受け部７０を介して取り付けカメラ１を天井や壁２０などにネジ止めすると、取り付けネジを介して天井や壁２０側にアースが取られてしまう場合がある。このとき、取り付けカメラ１側のアース電位と天井や壁２０側のアース電位とが異なると、ループ電流が流れてカメラの撮影機能に障害を与える。天井や壁２０側にアースが取られてしまうことを回避するには、取り付けネジとシャーシ６との間、あるいは取り付けネジと天井や壁２０との間を絶縁する必要があるが、部品が増えたり設置の手間が増えるなどの問題が生じる。
【０００４】
そこで、金属からなるシャーシ６を、樹脂から形成することが考えられている。図１２は、樹脂から形成されるシャーシのネジ止め部の断面図である。図１２に示すように樹脂から形成されるシャーシ９は、取り付けカメラ１を天井や壁２０にネジ止めするためのネジ受け部７０を有している。取り付けカメラ１は、シャーシ９のネジ受け部７０を介してネジ８０と天井や壁２０とが螺合されることにより取り付けられる。つまり、シャーシ９は、取り付けカメラ１を天井や壁２０等へ固定しつつ、取り付けカメラ１の落下を防止している。このとき、ネジ８０のネジ頭によりシャーシ９のネジ受け部７０周囲及び天井や壁２０等と接触しているシャーシ９が応力を受けている。そのため、シャーシ９がネジ締めトルクやソルベントクラック等の影響により樹脂割れした場合には、取り付けカメラ１が落下してしまうおそれがある。そこで、図１３に示すように樹脂からなるシャーシ９のネジ受け部７０周囲にワッシャ９０を設ける方法がある。ここでワッシャとは、ネジを締めるときに、ネジに挟み込む金属製の輪のことを言う。このようにネジ受け部７０にワッシャ９０を設けることで、ネジ止めされた場合のネジ受け部７０周囲の応力が分散される。しかしながら、樹脂からなるシャーシ９に応力がかかっており、シャーシ９の樹脂割れを完全に防止することはできない。そのため、シャーシ９が割れることにより取り付けカメラ１が天井や壁２０等から落下するという問題がある。
【０００５】
そこで、本発明は、落下防止構造を有するカメラ筐体を提供することを目的とする。
【０００６】
【課題を解決するための手段】
上記の課題を解決するために、本願第１発明は、樹脂により成型され、カメラが取り付けられる第１面及び前記第１面と対向する第２面を有し、前記第２面から突出する第１ネジ受け部が設けられたシャーシと、樹脂により成型され、前記第１ネジ受け部と嵌合する第１開口部と配線を収納するための収納部とが形成され、前記シャーシの第２面を覆う蓋部とを含み、前記第１ネジ受け部は前記第１開口部から突出し、前記第１開口部の径は前記第１ネジ受け部に嵌め込まれるネジのネジ頭の径よりも小さく形成されているカメラ筐体を提供する。
【０００７】
シャーシと蓋部とが嵌合した場合、カメラ筐体を天井や壁へ固定するためのネジを受ける第１ネジ受け部がシャーシの第１開口部から突出する。よって、カメラ筐体を天井や壁などにネジ止めした場合、第１ネジ受け部に通されたネジが天井や壁等と螺合し、かつシャーシの第１ネジ受け部と天井や壁とが密着することでカメラ筐体が取り付けられる。このとき、第１開口部の径が第１ネジ受け部に嵌合されるネジのネジ頭の径よりも小さく形成されているため、天井や壁と密着している第１ネジ受け部が樹脂割れした場合であっても、ネジ頭が第１開口部に引っかかる。よって、カメラ筐体の落下を防止することができる。また、樹脂から形成される蓋部には応力が働かず、蓋部の樹脂割れを防止することができる。さらに、上記のような構成のカメラ筐体においては、樹脂割れを防止するためのワッシャなどの別途の部品が不要なため、カメラ筐体にかかるコストを低下させることができる。
【０００８】
また、シャーシ及び蓋部は樹脂から形成されているため、第１ネジ受け部や配線を収納するための収納部等を一体成型により容易に形成することができる等、シャーシや蓋部の形状の自由度を高めることができる。さらに、蓋部が天井や壁等に接触した場合であっても、樹脂で形成されているため、シャーシに取り付けられている基板等に与える電気的影響を低減することができる。
本願第２発明は、本願第１発明において、前記シャーシは、前記第１ネジ受け部に連結され、前記第１ネジ受け部の径よりも大きい径を有するネジ誘導部をさらに含むカメラ筐体を提供する。
【０００９】
ネジ誘導部は第１ネジ受け部よりも大きい径を有して形成されているため、カメラ筐体を天井などに取り付ける作業が容易となる。例えば、カメラ筐体を取り付ける天井に、カメラ筐体の取り付けに先立ちネジを途中までねじ込む。この状態で、シャーシのネジ誘導部にそのネジを通し、ネジ誘導部に通っているネジが第１ネジ受け部に嵌合するようにシャーシを天井に沿う方向に動かす。従って、設置者は、シャーシを保持しつつネジ締めしなくても良くなり、カメラ筐体を天井に容易に取り付けることができる。
【００１０】
本願第３発明は、本願第１発明において、前記配線を固定する、一端がネジ止めされた帯状端子と、前記蓋部には、前記帯状端子を露出する接続孔と、前記帯状端子の回転を抑制する回転抑制部とがさらに形成されているカメラ筐体を提供する。
一端がネジ止めされた帯状端子に配線を固定する前は、帯状端子のネジ止めは緩められており、配線を帯状端子に固定する際にネジが締められる。カメラ筐体の設置者が帯状端子のネジを緩めた状態で帯状端子に配線を通そうとする時、帯状端子に配線が引っかかり、帯状端子が回転しようとする。しかし、回転抑制部により帯状端子の回転が防止され、設置者は容易に帯状端子に配線を通すことができる。また、設置者が一端のみがネジ止めされた帯状端子のネジ締めを行う際、回転抑制部は帯状端子がネジ締めに伴って回転するのを抑制する。よって、設置者は配線の固定を容易に行うことができる。なお、蓋部は樹脂であるため、収納部から突出する固定部を容易に形成することができる。
【００１１】
【発明の実施の形態】
＜実施形態例＞
図１（ａ）は本実施形態例の取り付けカメラのカメラユニット側の斜視図、図１（ｂ）は本実施形態例の取り付けカメラのカバーユニットの斜視図、図２はシャーシと蓋部との組み立て時の斜視図である。以下に、本実施形態例の取り付けカメラの構成を説明する。
本実施形態例の取り付けカメラ１は、カメラユニット３、カメラ筐体４及びカバーユニット５を有している。カメラユニット３は、カメラレンズ７、カメラ土台９及びカメラ取付部１１を有している。カメラ筐体４は、シャーシ１３及びシャーシ１３を覆う蓋部１００を有している。シャーシ１３は、樹脂から形成されており、第１面及び第１面と対向する第２面を有している。図１（ａ）に示すようにシャーシ１３の第１面には、カメラユニット３が取り付けられている。また、シャーシ１３の第１面には第１係合受け部２１ａ及び２１ｂが設けられており、カバーユニット５の第１係合部４１ａ及び４１ｂに係合することでカバーユニット５をシャーシ１３に固定する。シャーシ１３の第１面に取り付けられたカメラユニット３において、カメラレンズ７はカメラ土台９に固定され、カメラ土台９はシャーシ１３の第１面の平面に対して傾斜及び回転可能なようにカメラ取付部１１に取り付けられている。このカメラ土台９及びカメラ取付部１１によりカメラレンズ７の撮影方向の傾き及び回転を調整し、所望の方向を撮影できるように設定する。
【００１２】
図３は本実施形態例に係る取り付けカメラの第２面から見た平面図、図４は本実施形態例に係る取り付けカメラの第２面から見た斜視図である。図２〜図４に示すように、シャーシ１３の第２面、つまり天井や壁２０へ取り付けられる面を覆う蓋部１００は、第２係合部１１０ａ、１１０ｂ（第２係合部１１０）、第１開口部１２０ａ、１２０ｂ（第１開口部１２０）、第２開口部１３０ａ、１３０ｂ（第２開口部１３０）、収納部１４０、接続孔１５０ａ、１５０ｂ、１５０ｃ（接続孔１５０）及び回転抑制部１６０を有している。この蓋部１００は、樹脂から形成されている。
【００１３】
一方、シャーシ１３の第２面には、第２係合受け部１７０ａ、１７０ｂ（第２係合受け部１７０）、第１ネジ受け部１９０ａ、１９０ｂ（第１ネジ受け部１９０）及び第２ネジ受け部２００ａ、２００ｂ（図示しない）（第２ネジ受け部２００）が設けられている。ここで、第１ネジ受け部１９０は、シャーシ１３の第２面から突出するように設けられており、取り付けカメラ１を天井や壁２０等に固定するためのネジが嵌合される。このとき、第１ネジ受け部１９０は、後述の図５（ｂ）に示すようにネジと螺合される形状ではない。
【００１４】
ここで、蓋部１００に設けられた第１開口部１２０は、第１開口部１２０の径が第１ネジ受け部１９０に嵌め込まれるネジのネジ頭の径よりも小さく形成されるように、例えばシャーシ１３の第１ネジ受け部１９０の外周縁に沿うように形成されている。シャーシ１３と蓋部１００とを嵌合させた場合、シャーシ１３の第１ネジ受け部１９０は図５（ａ）に示すように蓋部１００の第１開口部１２０から突出する。また、図５（ｂ）に示すように取り付けカメラ１をネジ２０５により天井や壁２０等に取り付けた場合には、蓋部１００の第１開口部１２０から突出した第１ネジ受け部１９０が天井や壁２０等に接する。このとき、第１ネジ受け部１９０に嵌合されるネジ２０５は、第１ネジ受け部１９０と螺合せず、天井や壁２０等と螺合する。そして、ネジ２０５と天井や壁２０等との螺合によりシャーシ１３の第１ネジ受け部１９０と天井や壁２０等とが密着し、取り付けカメラ１が固定される。さらに、図５（ｂ）に示すように蓋部１００の第１開口部１２０は、第１開口部１２０の径が第１ネジ受け部１９０に嵌め込まれるネジ２０５のネジ頭の径よりも小さく形成されている。そのため、天井や壁２０等と密着している第１ネジ受け部１９０が樹脂割れした場合であっても、ネジ２０５のネジ頭が第１開口部１２０に係止されるため、取り付けカメラ１の落下を防止することができる。つまり、シャーシ１３の第１ネジ受け部１９０により取り付けカメラ１を固定しつつ、シャーシ１３が樹脂割れした場合でも蓋部１００の第１開口部１２０とネジ頭とにより取り付けカメラ１の落下を防止できる。
【００１５】
蓋部１００の収納部１４０は、天井や壁２０等に取り付けカメラ１を固定する際に、天井や壁２０側からの同軸ケーブル等の配線を収納するための空間である。収納部１４０に収納された配線等は接続孔１５０を介してシャーシ１３の第１面に通され、シャーシ１３の第１面に固定されたカメラユニット３に接続されたり、シャーシ１３の第１面及び／または第２面に取り付けられた回路基板に接続される。また、同軸ケーブルなどの配線等を固定する帯状端子２２０が回路基板上に設けられている場合には、帯状端子２２０の回転を抑制する回転抑制部１６０を収納部１４０に設けると好ましい。例えば、収納部１４０に同軸ケーブルを収納する場合、一般的に同軸ケーブルは太く、柔軟性に乏しいこと及びシャーシ１３に取り付けられた回路基板に電気的に接続するため、図６（ｂ）に示す固定部２１５、２１７により同軸ケーブルを固定する。例えば、シャーシ１３に取り付けられた回路基板２０７上には、図６（ａ）に示す同軸ケーブル２１０の芯線２１２を固定するための芯線固定部２１５や編線２１４を固定するための編線固定部２１７が設けられている。ここで、芯線固定部２１５はネジとネジ孔を有する台座部分の固定端子２１５ａとを有し、編線固定部２１７はネジ２３０とネジ孔を有する台座部分の固定端子２１７ａと帯状端子２２０とを有している。このとき帯状端子２２０は、端子の片側のみがネジ２３０により固定端子２１７ａに固定されている。このような回路基板２０７が設けられたシャーシ１３を図６（ｃ）に示すように蓋部１００により覆うと、芯線固定部２１５や編線固定部２１７が蓋部１００の接続孔１５０から突出する。蓋部１００から突出している編線固定部２１７への同軸ケーブル２１０の固定は、次のように行われる。一端が編線固定部２１７にネジ止めされた帯状端子２２０に同軸ケーブル２１０を固定する前は、帯状端子２２０のネジ２３０によるネジ止めは緩められている。カメラ筐体の設置者が帯状端子２２０のネジを緩めた状態で帯状端子２２０に配線を通そうとすると、帯状端子２２０に配線が引っかかり、帯状端子２２０が回転しようとする。しかし、回転抑制部１６０により帯状端子２２０の回転が防止され、設置者は固定された帯状端子２２０に容易に配線を通すことができる。さらに、同軸ケーブル２１０を帯状端子２２０に固定する際にネジ２３０が締められる。この一端のみがネジ止めされた帯状端子２２０のネジ締めを行う際、回転抑制部１６０は帯状端子２２０がネジ締めに伴って回転するのを抑制する。よって、同軸ケーブル２１０の固定を容易に行うことができる。また、帯状端子２２０により同軸ケーブル２１０や配線を固定することにより、配線等が基板２０７から外れ難くなり、カメラの撮影機能の低下や配線の切断を防止することができる。
【００１６】
上述のシャーシ１３と蓋部１００とは次のように嵌合される。蓋部１００の第２係合部１１０は、シャーシ１３の第２係合受け部１７０に係合し、シャーシ１３の第２面を覆うように蓋部１００をシャーシ１３に固定する。また、第２開口部１３０を介してネジ溝が切られた第２ネジ受け部２００とネジとを螺合させることで、蓋部１００をシャーシ１３にさらに固定する。
上記の構成は一例にすぎず、蓋部１００とシャーシ１３との固定は、蓋部１００がシャーシ１３から容易に外れないような構成であれば良く、上記の第２係合部１１０と第２係合受け部１７０との係合及び／または第２開口部１３０と第２ネジ受け部２００を介したネジによる固定に限定されず、形状、位置及び個数なども限定されない。
【００１７】
また、第１ネジ受け部１９０は、取り付けカメラ１が天井や壁２０などにネジ止めされる場合に、蓋部１００の第１開口部１２０から突出する構成であれば良い。例えば、蓋部１００とシャーシ１３とが嵌合された際に第１ネジ受け部１９０が第１開口部１２０から突出していない場合であっても、取り付けカメラ１を天井や壁２０に固定した際に第１ネジ受け部１９０が第１開口部１２０から突出し、天井や壁２０と接触する構成であっても良い。
図７はネジ誘導部を有するシャーシ及び蓋部の斜視図、図８は図７の平面図、図９はネジ誘導部を含むネジ受け部の拡大図である。図７〜図９に示すように、シャーシ１３は、第１ネジ受け部１９０に連結されるネジ誘導部２５０ａ、２５０ｂ（ネジ誘導部２５０）を有していると好ましい。このとき、図９に示すようにネジ誘導部２５０の内径Ａは、第１ネジ受け部１９０の内径Ｂよりも大きく形成されている。また、蓋部１００の第１開口部１２０は、図７に示すように、第１ネジ受け部１９０及びネジ誘導部２５０の外周縁に沿うように形成しておくと良い。ネジ誘導部２５０が形成されていると、シャーシ１３を天井などに取り付ける作業が容易となる。例えば、カメラ筐体を取り付ける天井に、カメラ筐体の取り付けに先立ち２つのネジを途中までねじ込む。このとき、設置者は、２つのネジの間隔及び位置を調整する。ネジ間隔は、第１ネジ受け部１９０の間隔に合うように調整される。取り付けられたネジに第１ネジ受け部１９０が係合した状態でカメラ筐体が所望の位置にくるよう、ネジ位置が調整される。途中までねじ込まれたネジをシャーシ１３のネジ誘導部２５０に通した後、ネジ誘導部２５０に通っているネジが第１ネジ受け部１９０に嵌るように、シャーシ１３を天井に沿う方向に回転させる。こうして、ネジと第１ネジ受け部１９０とを係合させる。このようにすれば、設置者はシャーシ１３を保持しつつネジ締めしなくても良くなり、カメラ筐体を天井に容易に取り付けることができる。
【００１８】
本実施形態例の取り付けカメラ１は、例えば以下のようにして設置される。蓋部１００及びカメラユニット３を取り付けたシャーシ１３を、シャーシ１３の第１ネジ受け部１９０及び蓋部１００の第１開口部１２０を介して天井や壁２０等にネジ止めする。このとき、図５（ｂ）に示すように第１ネジ受け部１９０はネジ２０５に螺合されることなく天井や壁２０等と接触する。一方、蓋部１００は天井や壁２０等と接触しない。さらにカバーユニット５をカメラユニット３を覆うようにシャーシ１３に取り付け、取り付けカメラ１が設置される。
【００１９】
本実施形態例の取り付けカメラ１では、シャーシ１３と蓋部１００とが嵌合した場合、カメラ筐体４を天井や壁へ固定するためのネジを受ける第１ネジ受け部１９０が第１開口部１２０から突出する。よって、取り付けカメラ１のカメラ筐体４を天井や壁２０などにネジ止めした場合、第１ネジ受け部１９０に通されたネジが天井や壁２０等と螺合し、かつシャーシ１３の第１ネジ受け部１９０天井や壁２０とが密着することで取り付けカメラ１が取り付けられる。このとき、第１開口部１２０の径が第１ネジ受け部１９０に嵌合されるネジ２０５のネジ頭の径よりも小さく形成されているため、天井や壁２０等と密着している第１ネジ受け部１９０が樹脂割れした場合であっても、ネジ頭が第１開口部１２０により係止される。よって、取り付けカメラ１の落下を防止することができる。また、樹脂から形成される蓋部１００には応力が働かず、蓋部１００の樹脂割れを防止することができる。さらに、上記のような構成の取り付けカメラ１においては、樹脂割れを防止するためのワッシャなどの別途の部品が不要なため、取り付けカメラ１にかかるコストを低下させることができる。
【００２０】
また、シャーシ１３及び蓋部１００は樹脂により形成されているため、第１ネジ受け部１９０や配線を収納するための収納部１４０や収納部１４０から突出する回転抑制部１６０等を一体成型により容易に形成することができる等、シャーシ１３や蓋部１００の形状の自由度を高めることができる。さらに、蓋部１００が天井や壁２０等に接触した場合であっても、樹脂で形成されているため取り付けカメラ１内部に収納されている基板等に与える電気的ノイズなどの影響が少ない。
【００２１】
【発明の効果】
本発明を用いることで、落下防止構造を有するカメラ筐体を提供することができる。
【図面の簡単な説明】
【図１】（ａ）本実施形態例の取り付けカメラのカメラユニット側の斜視図。
（ｂ）本実施形態例の取り付けカメラのカバーユニットの斜視図。
【図２】シャーシと蓋部との組み立て時の斜視図。
【図３】本実施形態例に係る取り付けカメラの第２面から見た平面図。
【図４】本実施形態例に係る取り付けカメラの第２面から見た斜視図。
【図５】（ａ）第１ネジ受け部と第１開口部との嵌合状態を示す断面図。
（ｂ）天井または壁に取り付けられた場合の第１ネジ受け部と第１開口部との嵌合状態を示す断面図。
【図６】（ａ）同軸ケーブル。
（ｂ）回路基板上の配線固定部を示す斜視図。
（ｃ）蓋部で覆われた回路基板上の配線固定部を示す斜視図。
【図７】ネジ誘導部を有するシャーシ及び蓋部の斜視図。
【図８】ネジ誘導部を有するシャーシ及び蓋部の平面図。
【図９】ネジ誘導部を含むネジ受け部の拡大図。
【図１０】従来の取り付けカメラの全体図。
【図１１】従来の取り付けカメラの取り付け面から見た斜視図。
【図１２】樹脂から成るシャーシを固定した場合の断面図。
【図１３】樹脂から成るシャーシをワッシャを用いて固定した場合の断面図。
【符号の説明】
１：取り付けカメラ
３：カメラユニット
４：カメラ筐体
５：カバーユニット
１３：シャーシ
１００：蓋部
１２０：第１開口部
１３０：第２開口部
１４０：収納部
１５０：接続孔
１６０：回転抑制部
１９０：第１ネジ受け部
２００：第２ネジ受け部
２５０：ネジ誘導部[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a camera housing of a mounting camera installed on a ceiling, a wall, or the like of a building.
[0002]
[Prior art]
FIG. 10 is an overall view of a conventional mounting camera, and FIG. 11 is a perspective view of the conventional mounting camera viewed from a mounting surface. The conventional mounting camera 1 has a chassis 6 to which a camera unit and the like are mounted, and a cover unit 5 that covers the camera unit. The chassis 6 has two opposing surfaces and a side surface connecting the two surfaces. Two opposing surfaces of the chassis 6 are formed of metal, and of the two surfaces, a downward facing surface in FIGS. 10 and 11 is provided with a camera unit such as a camera lens. As shown in FIG. 11, screw receiving portions 70a and 70b (screw receiving portions 70) are provided on a mounting surface facing the surface and in contact with the ceiling, the wall 20, and the like of the chassis 6. The mounting camera 1 is installed on the ceiling, the wall 20, or the like by screwing through the screw receiving portion 70. A circuit board for camera photographing is attached inside the chassis 6.
[0003]
[Problems to be solved by the invention]
However, in the conventional mounting camera 1, since the chassis 6 is formed of metal, it is difficult to perform processing such as molding of an opening or three-dimensional molding, and the degree of freedom of molding is low. Further, since metal is used, molding cost and material cost are required. Further, when the chassis 6 is made of metal, the attached camera 1 may be affected by electrical noise, which may hinder shooting by the attached camera 1. Therefore, the chassis 6 needs to be grounded, and this must be taken into consideration from the equipment design stage. However, if the mounting camera 1 is screwed to the ceiling or the wall 20 via the screw receiving portion 70 provided on the chassis 6, the ceiling or the wall 20 may be grounded via the mounting screw. At this time, if the ground potential of the attached camera 1 is different from the ground potential of the ceiling or the wall 20, a loop current flows and impairs the photographing function of the camera. In order to prevent the ceiling or the wall 20 from being grounded, it is necessary to insulate between the mounting screw and the chassis 6 or between the mounting screw and the ceiling or the wall 20. And the trouble of installation increases.
[0004]
Therefore, it has been considered to form the chassis 6 made of metal from resin. FIG. 12 is a sectional view of a screwed portion of a chassis formed of resin. As shown in FIG. 12, the chassis 9 formed of resin has a screw receiving portion 70 for screwing the attached camera 1 to the ceiling or the wall 20. The mounting camera 1 is mounted by screwing a screw 80 to a ceiling or a wall 20 via a screw receiving portion 70 of the chassis 9. That is, the chassis 9 prevents the attached camera 1 from dropping while fixing the attached camera 1 to the ceiling, the wall 20, or the like. At this time, stress is applied to the chassis 9 that is in contact with the periphery of the screw receiving portion 70 of the chassis 9, the ceiling, the wall 20 and the like by the screw head of the screw 80. For this reason, when the chassis 9 is cracked by a resin due to an influence of a screw tightening torque, a solvent crack, or the like, the attached camera 1 may be dropped. Therefore, there is a method of providing a washer 90 around the screw receiving portion 70 of the chassis 9 made of resin as shown in FIG. Here, the washer refers to a metal ring that is sandwiched between the screws when the screws are tightened. By providing the washer 90 in the screw receiving portion 70 in this manner, the stress around the screw receiving portion 70 when screwed is dispersed. However, stress is applied to the chassis 9 made of resin, and it is not possible to completely prevent the resin cracking of the chassis 9. Therefore, there is a problem that the attached camera 1 falls from the ceiling, the wall 20 or the like due to the crack of the chassis 9.
[0005]
Therefore, an object of the present invention is to provide a camera housing having a fall prevention structure.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, a first invention of the present application has a first surface molded with resin and having a first surface to which a camera is attached and a second surface facing the first surface, and a second surface protruding from the second surface. A chassis provided with the first screw receiving portion, a first opening molded with resin and fitted with the first screw receiving portion, and a storage portion for storing wiring are formed, and a second surface of the chassis is formed. A first screw receiving portion protrudes from the first opening, and a diameter of the first opening is smaller than a diameter of a screw head of a screw fitted into the first screw receiving portion. To provide a camera housing.
[0007]
When the chassis and the lid are fitted together, a first screw receiving portion for receiving a screw for fixing the camera housing to a ceiling or a wall protrudes from the first opening of the chassis. Therefore, when the camera housing is screwed to a ceiling, a wall, or the like, the screw passed through the first screw receiving portion is screwed with the ceiling, the wall, or the like, and the first screw receiving portion of the chassis and the ceiling or the wall are connected. The camera housing is attached by the close contact. At this time, since the diameter of the first opening is formed smaller than the diameter of the screw head of the screw fitted to the first screw receiving portion, the first screw receiving portion which is in close contact with the ceiling or the wall is made of resin. Even if it breaks, the screw head is caught by the first opening. Therefore, it is possible to prevent the camera housing from falling. Further, since no stress acts on the lid portion formed of resin, the lid can be prevented from cracking. Further, in the camera housing having the above-described configuration, since a separate component such as a washer for preventing resin cracking is not required, the cost of the camera housing can be reduced.
[0008]
In addition, since the chassis and the lid are formed of resin, the first screw receiving portion and the storage portion for storing the wiring can be easily formed by integral molding. The degree of freedom can be increased. Furthermore, even when the lid contacts the ceiling, the wall, or the like, since the lid is formed of resin, it is possible to reduce the electrical influence on the substrate and the like attached to the chassis.
According to a second aspect of the present invention, in the first aspect of the present invention, the camera housing further includes a screw guiding portion connected to the first screw receiving portion and having a diameter larger than a diameter of the first screw receiving portion. provide.
[0009]
Since the screw guiding portion is formed to have a diameter larger than that of the first screw receiving portion, the operation of attaching the camera housing to a ceiling or the like becomes easy. For example, a screw is screwed halfway into the ceiling where the camera housing is to be mounted before mounting the camera housing. In this state, the screw is passed through the screw guide portion of the chassis, and the chassis is moved in the direction along the ceiling so that the screw passing through the screw guide portion fits into the first screw receiving portion. Therefore, the installer does not need to tighten the screws while holding the chassis, and can easily attach the camera housing to the ceiling.
[0010]
According to a third aspect of the present invention, in the first aspect of the present invention, in the first aspect of the present invention, a strip-shaped terminal fixing one end of the wiring, one end of which is screwed, a connection hole for exposing the strip-shaped terminal in the lid portion, Provided is a camera housing further provided with a rotation suppressing portion for suppressing.
Before fixing the wiring to the strip-shaped terminal having one end screwed, the screw of the strip-shaped terminal is loosened, and the screw is tightened when fixing the wiring to the strip-shaped terminal. When the installer of the camera housing tries to pass the wiring through the band terminal with the screws of the band terminal loosened, the line is caught by the band terminal and the band terminal tries to rotate. However, the rotation of the band terminal is prevented by the rotation suppressing portion, and the installer can easily pass the wiring through the band terminal. Further, when the installer tightens the screw of the band-shaped terminal having only one end screwed, the rotation suppressing unit suppresses the rotation of the band-shaped terminal due to the screw tightening. Therefore, the installer can easily fix the wiring. In addition, since the lid is made of resin, the fixing part protruding from the storage part can be easily formed.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
<Embodiment example>
1A is a perspective view of the camera unit side of the attached camera of the embodiment, FIG. 1B is a perspective view of a cover unit of the attached camera of the embodiment, and FIG. It is a perspective view at the time of an assembly. Hereinafter, the configuration of the attached camera according to the present embodiment will be described.
The attached camera 1 of the embodiment has a camera unit 3, a camera housing 4, and a cover unit 5. The camera unit 3 has a camera lens 7, a camera base 9, and a camera mounting portion 11. The camera housing 4 has a chassis 13 and a lid 100 that covers the chassis 13. The chassis 13 is made of resin, and has a first surface and a second surface facing the first surface. As shown in FIG. 1A, the camera unit 3 is mounted on the first surface of the chassis 13. Further, first engagement receiving portions 21 a and 21 b are provided on the first surface of the chassis 13, and the cover unit 5 is attached to the chassis 13 by engaging with the first engagement portions 41 a and 41 b of the cover unit 5. Fix it. In the camera unit 3 mounted on the first surface of the chassis 13, the camera lens 7 is fixed to the camera base 9, and the camera base 9 is mounted on the camera 13 so that it can be tilted and rotated with respect to the plane of the first surface of the chassis 13. It is attached to the unit 11. The tilt and rotation of the camera lens 7 in the shooting direction are adjusted by the camera base 9 and the camera mounting portion 11 so that the camera lens 7 is set so that a desired direction can be shot.
[0012]
FIG. 3 is a plan view of the mounting camera according to the embodiment as viewed from the second surface, and FIG. 4 is a perspective view of the mounting camera according to the embodiment as viewed from the second surface. As shown in FIGS. 2 to 4, the lid 100 that covers the second surface of the chassis 13, that is, the surface attached to the ceiling or the wall 20, includes second engagement portions 110 a and 110 b (second engagement portions 110). First openings 120a, 120b (first opening 120), second openings 130a, 130b (second opening 130), storage section 140, connection holes 150a, 150b, 150c (connection hole 150) and rotation suppressing section 160. The lid 100 is made of resin.
[0013]
On the other hand, the second surface of the chassis 13 has second engagement receiving portions 170a and 170b (second engagement receiving portion 170), first screw receiving portions 190a and 190b (first screw receiving portion 190), and a second screw receiving portion. Receiving parts 200a and 200b (not shown) (second screw receiving part 200) are provided. Here, the first screw receiving portion 190 is provided so as to protrude from the second surface of the chassis 13, and a screw for fixing the attached camera 1 to the ceiling, the wall 20, or the like is fitted. At this time, the first screw receiving portion 190 does not have a shape to be screwed with the screw as shown in FIG.
[0014]
Here, the first opening 120 provided in the lid 100 is formed, for example, such that the diameter of the first opening 120 is smaller than the diameter of the screw head of the screw fitted into the first screw receiving portion 190. The first screw receiving portion 190 of the chassis 13 is formed along the outer peripheral edge. When the chassis 13 and the lid 100 are fitted together, the first screw receiving portion 190 of the chassis 13 projects from the first opening 120 of the lid 100 as shown in FIG. In addition, as shown in FIG. 5B, when the mounting camera 1 is mounted on the ceiling, the wall 20, or the like with the screws 205, the first screw receiving portion 190 protruding from the first opening 120 of the lid 100 is mounted on the ceiling. And wall 20 etc. At this time, the screw 205 fitted to the first screw receiving portion 190 does not screw to the first screw receiving portion 190, but screws to the ceiling, the wall 20, or the like. Then, the screw 205 is screwed to the ceiling, the wall 20, or the like, so that the first screw receiving portion 190 of the chassis 13 and the ceiling, the wall 20, or the like are in close contact with each other, and the camera 1 is fixed. Further, as shown in FIG. 5B, the first opening 120 of the lid 100 is formed such that the diameter of the first opening 120 is smaller than the diameter of the screw head of the screw 205 fitted into the first screw receiving portion 190. Have been. Therefore, even if the first screw receiving portion 190 that is in close contact with the ceiling, the wall 20, or the like is broken by resin, the screw head of the screw 205 is locked in the first opening 120, so that the mounting camera 1 Fall can be prevented. That is, while the camera 13 is fixed by the first screw receiving portion 190 of the chassis 13, the camera 1 can be prevented from falling by the first opening 120 and the screw head of the lid 100 even when the chassis 13 is broken by resin. .
[0015]
The storage section 140 of the lid section 100 is a space for storing wiring such as a coaxial cable from the ceiling or the wall 20 when the camera 1 is mounted on the ceiling or the wall 20 and fixed. The wiring and the like stored in the storage section 140 are passed through the first surface of the chassis 13 through the connection holes 150 and are connected to the camera unit 3 fixed to the first surface of the chassis 13 or the first surface of the chassis 13. And / or connected to a circuit board attached to the second surface. In the case where the strip-shaped terminals 220 for fixing wiring such as a coaxial cable are provided on the circuit board, it is preferable that the rotation suppressing section 160 for suppressing the rotation of the strip-shaped terminals 220 is provided in the storage section 140. For example, when a coaxial cable is stored in the storage unit 140, the coaxial cable is generally thick and inflexible, and is electrically connected to a circuit board mounted on the chassis 13, as shown in FIG. The coaxial cable is fixed by the fixing portions 215 and 217. For example, a core fixing part 215 for fixing the core 212 of the coaxial cable 210 and a knitting fixing part for fixing the knitting 214 shown in FIG. 217 are provided. Here, the core wire fixing portion 215 has a screw and a pedestal portion fixing terminal 215a having a screw hole, and the braided wire fixing portion 217 has a screw 230 and a pedestal portion fixing terminal 217a having a screw hole and the strip terminal 220. Have. At this time, the strip-shaped terminal 220 is fixed to the fixed terminal 217a by the screw 230 on only one side of the terminal. When the chassis 13 provided with such a circuit board 207 is covered by the cover 100 as shown in FIG. 6C, the core fixing portion 215 and the knitting wire fixing portion 217 protrude from the connection holes 150 of the cover 100. . The fixing of the coaxial cable 210 to the braided wire fixing part 217 protruding from the lid part 100 is performed as follows. Before the coaxial cable 210 is fixed to the strip terminal 220 having one end screwed to the braided wire fixing portion 217, the screw 230 of the strip terminal 220 is loosened. If the installer of the camera housing tries to pass the wiring through the band-shaped terminal 220 with the screws of the band-shaped terminal 220 loosened, the wiring is caught on the band-shaped terminal 220 and the band-shaped terminal 220 tries to rotate. However, the rotation of the band terminal 220 is prevented by the rotation suppressing unit 160, and the installer can easily pass the wiring through the fixed band terminal 220. Further, the screw 230 is tightened when the coaxial cable 210 is fixed to the strip terminal 220. When screwing the band-shaped terminal 220 having only one end screwed, the rotation suppressing unit 160 suppresses the rotation of the band-shaped terminal 220 due to the screw tightening. Therefore, the coaxial cable 210 can be easily fixed. Further, by fixing the coaxial cable 210 and the wiring with the strip-shaped terminal 220, the wiring and the like are hardly detached from the substrate 207, so that it is possible to prevent the photographing function of the camera from being lowered and the wiring from being cut.
[0016]
The above-described chassis 13 and the lid 100 are fitted as follows. The second engagement portion 110 of the cover 100 engages with the second engagement receiving portion 170 of the chassis 13 to fix the cover 100 to the chassis 13 so as to cover the second surface of the chassis 13. Further, the cover 100 is further fixed to the chassis 13 by screwing the screw into the second screw receiving portion 200 having the thread groove formed through the second opening 130.
The above configuration is merely an example, and the lid 100 and the chassis 13 may be fixed to each other as long as the lid 100 is not easily detached from the chassis 13. It is not limited to the engagement with the engagement receiving portion 170 and / or the fixing by the screw via the second opening 130 and the second screw receiving portion 200, and the shape, the position, the number, and the like are not limited.
[0017]
Further, the first screw receiving portion 190 may be configured to protrude from the first opening 120 of the lid portion 100 when the attached camera 1 is screwed to the ceiling, the wall 20, or the like. For example, even when the first screw receiving portion 190 does not protrude from the first opening 120 when the lid portion 100 and the chassis 13 are fitted, when the attached camera 1 is fixed to the ceiling or the wall 20. Alternatively, the first screw receiving portion 190 may protrude from the first opening 120 and contact the ceiling or the wall 20.
7 is a perspective view of a chassis having a screw guiding portion and a lid portion, FIG. 8 is a plan view of FIG. 7, and FIG. 9 is an enlarged view of a screw receiving portion including the screw guiding portion. As shown in FIGS. 7 to 9, it is preferable that the chassis 13 include screw guides 250 a and 250 b (screw guides 250) connected to the first screw receiver 190. At this time, as shown in FIG. 9, the inner diameter A of the screw guiding portion 250 is formed to be larger than the inner diameter B of the first screw receiving portion 190. The first opening 120 of the cover 100 may be formed along the outer peripheral edges of the first screw receiving portion 190 and the screw guiding portion 250 as shown in FIG. When the screw guiding portion 250 is formed, the work of attaching the chassis 13 to a ceiling or the like becomes easy. For example, two screws are screwed halfway into the ceiling where the camera housing is to be mounted before mounting the camera housing. At this time, the installer adjusts the interval and position of the two screws. The screw interval is adjusted to match the interval between the first screw receiving portions 190. The screw position is adjusted so that the camera housing comes to a desired position with the first screw receiving portion 190 engaged with the attached screw. After the screw screwed halfway is passed through the screw guide 250 of the chassis 13, the chassis 13 is rotated in a direction along the ceiling so that the screw passing through the screw guide 250 fits into the first screw receiving portion 190. . Thus, the screw and the first screw receiving portion 190 are engaged. By doing so, the installer does not need to tighten the screws while holding the chassis 13, and the camera housing can be easily attached to the ceiling.
[0018]
The attached camera 1 of the present embodiment is installed, for example, as follows. The chassis 13 to which the lid 100 and the camera unit 3 are attached is screwed to the ceiling or the wall 20 via the first screw receiving portion 190 of the chassis 13 and the first opening 120 of the lid 100. At this time, as shown in FIG. 5B, the first screw receiving portion 190 comes into contact with the ceiling, the wall 20, and the like without being screwed to the screw 205. On the other hand, the lid 100 does not contact the ceiling, the wall 20, and the like. Further, the cover unit 5 is attached to the chassis 13 so as to cover the camera unit 3, and the attached camera 1 is installed.
[0019]
In the mounted camera 1 of the present embodiment, when the chassis 13 and the lid 100 are fitted, the first screw receiving portion 190 for receiving a screw for fixing the camera housing 4 to a ceiling or a wall is provided in the first opening. Projecting from 120. Therefore, when the camera housing 4 of the attached camera 1 is screwed to the ceiling, the wall 20, or the like, the screw passed through the first screw receiving portion 190 is screwed with the ceiling, the wall 20, or the like, and the first of the chassis 13 The mounting camera 1 is mounted by the screw receiving portion 190 being in close contact with the ceiling or the wall 20. At this time, since the diameter of the first opening 120 is formed smaller than the diameter of the screw head of the screw 205 fitted to the first screw receiving portion 190, the first opening 120 is in close contact with the ceiling, the wall 20, and the like. The screw head is locked by the first opening 120 even when the screw receiving portion 190 is broken. Therefore, it is possible to prevent the attached camera 1 from falling. In addition, no stress acts on the lid portion 100 formed of resin, so that the resin crack of the lid portion 100 can be prevented. Further, in the mounting camera 1 having the above configuration, since a separate component such as a washer for preventing resin cracking is not required, the cost of the mounting camera 1 can be reduced.
[0020]
Further, since the chassis 13 and the lid 100 are formed of resin, the first screw receiving portion 190, the storage portion 140 for storing the wiring, the rotation suppressing portion 160 protruding from the storage portion 140, and the like are easily formed by integral molding. For example, the degree of freedom of the shape of the chassis 13 and the lid 100 can be increased. Further, even when the lid portion 100 comes into contact with the ceiling, the wall 20, or the like, since it is made of resin, the influence of electric noise and the like on the substrate and the like housed inside the mounting camera 1 is small.
[0021]
【The invention's effect】
By using the present invention, a camera housing having a fall prevention structure can be provided.
[Brief description of the drawings]
FIG. 1A is a perspective view of a camera unit side of a mounted camera according to an embodiment of the present invention.
(B) A perspective view of a cover unit of the attached camera according to the embodiment.
FIG. 2 is a perspective view when the chassis and the lid are assembled.
FIG. 3 is a plan view of the mounting camera according to the embodiment as viewed from a second surface.
FIG. 4 is a perspective view of the mounting camera according to the embodiment as viewed from a second surface.
FIG. 5A is a sectional view showing a fitted state of a first screw receiving portion and a first opening.
(B) Sectional drawing which shows the fitting state of the 1st screw receiving part and the 1st opening part when attached to a ceiling or a wall.
FIG. 6 (a) Coaxial cable.
(B) A perspective view showing a wiring fixing portion on the circuit board.
(C) A perspective view showing a wiring fixing portion on the circuit board covered by the lid.
FIG. 7 is a perspective view of a chassis having a screw guiding section and a lid.
FIG. 8 is a plan view of a chassis having a screw guiding portion and a lid.
FIG. 9 is an enlarged view of a screw receiving portion including a screw guiding portion.
FIG. 10 is an overall view of a conventional mounting camera.
FIG. 11 is a perspective view of a conventional mounting camera viewed from a mounting surface.
FIG. 12 is a sectional view when a chassis made of resin is fixed.
FIG. 13 is a cross-sectional view when a chassis made of resin is fixed using a washer.
[Explanation of symbols]
1: Mounted camera 3: Camera unit 4: Camera housing 5: Cover unit 13: Chassis 100: Lid section 120: First opening section 130: Second opening section 140: Storage section 150: Connection hole 160: Rotation suppression section 190 : First screw receiving portion 200: second screw receiving portion 250: screw guiding portion

Claims

A chassis formed of resin, having a first surface on which a camera is mounted, a second surface facing the first surface, and a first screw receiving portion projecting from the second surface;
A first opening formed to be fitted with the first screw receiving portion and a storage portion for storing wiring, the cover portion covering a second surface of the chassis;
The camera housing, wherein the first screw receiving portion protrudes from the first opening, and a diameter of the first opening is formed smaller than a diameter of a screw head of a screw fitted into the first screw receiving portion.

The camera housing according to claim 1, wherein the chassis further includes a screw guide connected to the first screw receiver and having a diameter larger than a diameter of the first screw receiver.

A band-shaped terminal having one end screwed, fixing the wiring,
2. The camera housing according to claim 1, wherein the lid further includes a connection hole exposing the strip-shaped terminal, and a rotation suppressing unit that suppresses rotation of the strip-shaped terminal. 3.