JP2004112553A - Supporting apparatus for imaging apparatus - Google Patents

Supporting apparatus for imaging apparatus Download PDF

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JP2004112553A
JP2004112553A JP2002274189A JP2002274189A JP2004112553A JP 2004112553 A JP2004112553 A JP 2004112553A JP 2002274189 A JP2002274189 A JP 2002274189A JP 2002274189 A JP2002274189 A JP 2002274189A JP 2004112553 A JP2004112553 A JP 2004112553A
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imaging device
supported
monitoring camera
holding member
optical axis
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JP2002274189A
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Japanese (ja)
Inventor
Kohei Yamashita
山下 浩平
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Victor Company of Japan Ltd
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Victor Company of Japan Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a supporting apparatus with which turning of an imaging apparatus is adjusted in a panning/tilting direction and around an optical axis and the imaging apparatus is easily fixed after the adjustment in simple configuration with the small number of components. <P>SOLUTION: Surfaces 14a and 14b to be supported each composed of a part of a spherical surface are formed on lateral sides 11a and 11b of a casing of a monitoring camera (imaging apparatus) 1. Supporting plates 2a and 2b are fixed and arranged outside the surfaces 14a and 14b to be supported, one supporting plate 2a is equipped with a holding member 16a which slides the surface 14a to be supported in tight contact manner therewith, a leaf spring 17 for energizing the holding member and a fixing screw 18, and the other supporting plate 2b is equipped with a holding member 16b of the same function, and the monitoring camera 1 is supported by a partial spherical joint mechanism. Turning is freely adjusted while receiving suitable sliding friction resistance and it is enough to fasten the fixing screw 18 in the adjusted state for fixing work. It is preferable to set the center of the spherical surface 13 on the optical axis and/or to the center of gravity of the monitoring camera 1. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は撮像装置の支持装置に係り、特に撮像エリアを固定した状態で設置される監視用カメラの支持装置等に適用され、設置後の調整・固定作業を容易にするための改良に関する。
【0002】
【従来の技術】
近年、スーパーマーケットやコンビニエンスストア等の商業店舗や交通機関の駅構内等で、壁や天井に監視用カメラを設置していることが多い。
そして、監視用カメラの支持装置には、水平方向と垂直方向への回動を可能にして撮像エリアを適宜変化させるパン・チルト機能を備えたものがあるが、前記用途に用いられる監視用カメラでは、コスト面を考慮して、そのような機能を備えていない撮像エリア固定式のものが多用されている。
【0003】
ところで、撮像エリア固定式の監視用カメラを設置した際には、後で監視用カメラを回動させて調整しなければならない場合が多い。
これは、一般的に取付工事と電気配線工事は別の業者が担当し、取付工事が完了した後に電気配線工事を行い、その段階で初めて撮像画面を確認できるためである。即ち、取付工事では目視作業で監視用カメラの光軸をほぼ目的とする撮像エリアの方向に向けて取り付けるだけであり、殆どの場合に所要エリアの画像を映し出せていないからである。
【0004】
そのため、その種の監視用カメラの支持装置には光軸を一定範囲の自由度で回動させることが可能な調整機構が設けられている。
例えば、図5は監視用カメラとその支持装置を示す斜視図であり、この場合には、取付用基台51に監視用カメラ52が支持装置を介して取り付けられていると共に、それらが透明なガラス製又はプラスチック製のドーム53で覆われた構成になっている。
【0005】
前記の支持装置は、取付用基台51と監視用カメラ52の間に3つのブラケット54,55,56を介在させて、監視用カメラ52が取付用基台51に対してパン・チルト方向に回動し、また監視用カメラ52がその光軸回りに回動するように支持した機構を採用している。
先ず、ブラケット54は環状板部54aとそれに垂直な2枚の立設板部54bとからなり、環状板部54aの外周部分が取付用基台51側に設けた係合片57によって案内されることでブラケット54全体が取付用基台51に垂直な軸の回りに回動できるようになっている。
ブラケット55は環状板部55aとそれに垂直な2枚のアーム板部55bとからなるが、その各アーム板部55bの先端部分とブラケット54の各立設板部54bの先端部分とが各固定ネジ58で軸支・連結されており、ブラケット55全体は各固定ネジ58の軸回りに回動できるようになっている。
ブラケット56は、環状板部56aとブラケット55の周囲を把持する3つの把持片部56bと、監視用カメラ52の後端部分を固定する把持片部56cとからなり、前記ブラケット55の環状板部55aの軸周りに回動できるようになっている。
そして、取付用基台51とブラケット54の環状板部54aとの間、ブラケット54の各立設板部54bとブラケット55の各アーム板部55bの連結部分、及びブラケット55の環状板部55aとブラケット56の環状板部56aとの間には、それぞれ波板状のスプリングワッシャ59,60,61が介装されている。
また、取付用基台51に対して押え板62をネジ63で締着することによってブラケット54の環状板部54aを取付用基台51に固定でき、ブラケット56の把持片部56bに形成されているネジ孔にネジ64を螺着してブラケット55とブラケット56の各環状板部55a,56aを押圧させることで、ブラケット55に対してブラケット56が固定できるようになっている。
尚、各ブラケット54,55,56が中抜き形状の環状板部54a,55a,56aとして構成されているのは、信号線ケーブル65を監視用カメラ52の背面から取付用基台51の裏側へ導くためである。
【0006】
そして、監視用カメラ52の調整・固定に際しては、監視用カメラ52が出力する撮像画面を見ながら、次のような手順で実行される。
(1) 取付用基台51に対してブラケット54(又は監視用カメラ52)を回動させて所要のパン位置を求め、押え板62をネジ63で締着してブラケット54を固定する。
(2) ブラケット54に対してブラケット55(又は監視用カメラ52)を回動させて所要のチルト位置を求め、固定ネジ58を締め付けることによりブラケット55を固定する。
(3) 監視用カメラ52をその光軸回りに回動させて所要の角度位置を求め、ブラケット56の把持片部56bに設けたネジ64でブラケット55の環状板部55aをブラケット56側へ押し付けることによりブラケット56を固定する。
尚、前記の各手順(1),(2),(3)において、各スプリングワッシャ59,60,61は摩擦による適度な摺動状態を生じさるため、回動調整作業は比較的容易に実行できる。
【0007】
以上のように、図5に示す監視用カメラの支持装置はパン方向とチルト方向及び光軸周りの角度を調整・固定できるように構成されているが、一般に各調整のための角度範囲は、パン方向について±45°程度、チルト方向について0°(水平)〜90°(垂直)以上、光軸回りの角度について±20°程度が必要とされている。
これは、設置現場での経験に基づいて、パン方向に関しては設置の際に大体の方向を合わせるようにするために±45°程度が確保されていれば十分であること、チルト方向に関してはパン方向と異なり方向を合わせることが困難であるために0°から90°の範囲を確保しておく必要があること、光軸回りの角度に関しては天井等の取付部の傾斜に伴う画像の角度を補正する調整であるために±20°程度が確保されていれば足りることによる。
【0008】
次に、監視用カメラの支持装置としては適用されていないが、パン方向とチルト方向にカメラの光軸を調整する装置としては写真用カメラ等の雲台に適用されている各種の技術がある。
一般的に、雲台は球継ぎ手によってカメラの設置台をパン・チルト方向へ自在に調整でき、止めネジで球体をロックすることによって設置台を固定する方式を採用しているが、例えば、次の特許文献1に示されるように、調整を容易にするための工夫を施した機構が多数提案されている。
【0009】
【特許文献1】
特開昭64−26094号公報
【0010】
【発明が解決しようとする課題】
ところで、前記の監視用カメラの支持装置では、パン方向とチルト方向の回動、及び監視用カメラ52の光軸回りの回動について、それぞれ独立した機構によって自由度を与えており、従ってそれぞれの回動部分に支持機構が独立して構成されている。
その結果、図5に示すように部品点数が非常に多くなり、製造コストが高くなると共に全体の重量も大きくなってしまうという不利がある。
また、監視用カメラ52の調整・固定に際しても前記手順で説明したように各回動方向に係る独立した作業が必要になる。
特に、この種の作業は天井や壁に向かって高所で行われる場合が殆どであり、工数が多くなると作業の非効率化と危険性の増大を招くという問題がある。
【0011】
一方、前記の雲台に係る調整・固定機構によれば、パン・チルト方向について同時に調整が行えると共に、固定作業も1個の止めネジを締め付けるだけで足りる。
但し、その機構ではカメラの光軸回りの調整が行えず、また監視用カメラの重量は比較的大きいために小さな球継ぎ手の基本構造では十分な固定条件を確保できないという問題がある。
更に、カメラが雲台を中心に回動するため、調整の際にカメラが大きく動くことになり、仮に監視用カメラに適用したとすると、図5に示すドーム53を大きくせざるを得ないという問題が生じる。
【0012】
そこで、本発明は、雲台の支持機構に関する技術を部分的に利用することにより、前記の監視用カメラの調整・固定に係る各課題を解消させた「撮像装置の支持装置」を提供することを目的として創作された。
【0013】
【課題を解決するための手段】
本発明は、撮像装置の筐体における光軸を挟んで対向する各側壁の外側面に、中心が前記筐体内に位置する球面の一部として構成された被支持面をそれぞれ形成しておくと共に、前記撮像装置の各被支持面の外側に支柱をそれぞれ固定・配設せしめ、その一方の支柱には、前記被支持面の曲率半径以下の曲率半径で形成された凹状球面を有する部材であって、前記被支持面側へ弾性力で付勢され、前記被支持面を部分的に抱持する抱持部材と、一定の操作によって前記抱持部材を前記被支持面へ強力に押圧させる固定機構とを設け、また、他方の支柱には、前記抱持部材と同機能の抱持部材を設け、前記の各支柱に設けた各抱持部材が前記撮像装置を介して相互に対向する位置において前記撮像装置の各被支持面を支持することを特徴とする撮像装置の支持装置に係る。
【0014】
この発明は、各支柱に設けた抱持部材で撮像装置側の各被支持面を部分的に支持することにより、雲台に適用されている球継ぎ手機構と同様の機能を実現している。
即ち、一方の支柱に設けた弾性機構によって双方の支柱の抱持部材が撮像装置の各被支持面に対して適度な圧力で密接又は当接せしめられており、撮像装置は各抱持部材で支持されながら適当な摺動摩擦を保ってパン・チルト方向及び光軸回りに自在に回動できるようになっている。
従って、撮像装置の回動調整を適度な摺動摩擦状態で行うことができ、自在な回動機能と相俟って調整作業が円滑且つ容易になる。
そして、撮像装置の回動調整が完了した段階で、固定機構を操作して抱持部材を被支持面へ強力に押圧させると各摺動支持面の摩擦力が大きくなり、撮像装置が調整後の状態で完全に固定される。
尚、抱持部材に対する弾性力の供給方式としては、板バネやコイルバネ等の弾性部材を適用する方式に限らず、抱持部材自体を弾性部材として構成する方式が考えられる。
【0015】
ところで、撮像装置における各側壁の外側面のサイズや形状と被支持面の曲率半径の設定の仕方によっては、それらの面が交叉しない場合があり得る。
そして、その条件下では、撮像装置を回動させた際に抱持部材が被支持面から外側へ外れて支持状態が得られなくなるという不具合を生じる。
この問題については、前記の非交叉部分に被支持面から突出した縁部を形成しておけば、その縁部が抱持部材に対するストッパーとしての機能を果たし、前記の不具合を合理的に解決できる。
尚、非交叉部分がない場合においては、当然に撮像装置の各側壁の外側面がストッパーとして機能することになる。
その場合、縁部と外側面によって撮像装置の回動範囲が制限されるが、光軸回りの回動範囲をパン方向の回動範囲よりも小さくなるように制限しておけば、撮像装置を誤って大きくずれた角度に設定したり、振動や衝撃等によって大きくずれてしまうことを防止できる。
【0016】
また、この発明では、撮像装置の各被支持面がなす球面の中心を、前記撮像装置の光軸上に一致させておけば、所要の撮像画面を得るための調整作業が容易になり、特に、光軸回りの調整に際して効果的である。
更に、撮像装置の各被支持面がなす球面の中心を、撮像装置の重心と一致させておけば、常に撮像装置の重量の偏りをキャンセルした状態で支持できるため、振動や衝撃が作用したり固定機構が緩んだりした際に撮像装置の光軸が固定位置からずれてしまうことを合理的に抑制できる。
【0017】
【発明の実施の形態】
以下、本発明に係る撮像装置の支持装置の実施形態を、図1から図4を用いて詳細に説明する。
先ず、図1(A)は監視用カメラとその支持装置の外観斜視図を、同図(B)は図1(A)におけるX−X矢視断面図を示す。
各図において、1は監視用カメラ、2はコ字状フレームとして成形されたブラケットであり、監視用カメラ1はそれ自体の側部とブラケット2の間に構成した支持機構によって支持されている。
【0018】
そして、前記の支持機構は次のような特徴を備えている。
(1) 監視用カメラ1の光軸1aに平行な筐体の両側面11a,11bには、光軸1a上に中心12を有した球面13の一部として構成された被支持面14a,14bが形成されている。
具体的には、前記の球面13を監視用カメラ1の筐体の高さ:H1の範囲に限定し、側面が球面13の一部となった半月状の膨出部を筐体の両側面11a,11bに設けてあり、その膨出部の側面が被支持面14a,14bになっている。
【0019】
(2) この実施形態では、監視用カメラ1の筐体が光軸方向へ長い直方体の形態をなしており、前記の球面13の直径:Dは筐体の光軸方向長さよりも小さく設定されているが、筐体の高さ:H1よりも大きく設定されている。
従って、球面13と筐体の両側面11a,11bは、監視用カメラ1の筐体の長手方向に関してはその範囲内で交叉しているが、高さ方向の縁では交叉していない。
後記のように、前記の被支持面14a,14bは監視用カメラ1のパン・チルト方向及び光軸周りの回動範囲を画するものであるため、前記の非交叉部分、即ち被支持面14a,14bの上側部分と下側部分には、それぞれ球面13に沿って各被支持面14a,14bから突出した縁部15a,15b,15c,15dが形成されている。
【0020】
(3) ブラケット2は取付板2cと両側の支柱板2a,2bの部分からなり、各支柱板2a,2bの先端側区間に支持機構が設けられている。
先ず、一方の支柱板2aの支持機構は、抱持部材16aと板バネ17と固定ネジ18とで構成されている。
ここで、抱持部材16aは、監視用カメラ1側の被支持面14aを直接抱持する機素であり、平面形状が略方形状をなしていると共に、被支持面14aに対する当接面は前記の球面13に対応した凹状球面とされている。また、平面形状でのサイズは、高さ方向の寸法:hよりも幅方向の寸法:wが大きくなっているが、その各寸法:h,wは監視用カメラ1側の被支持面14aの上下に形成された各縁部15a,15bの間隔:H2よりも小さく設定されており、且つ、図1から明らかなように、幅方向の長さ:wは監視用カメラ1側の被支持面14aと側面11aの交叉線がなす間隔よりも遥かに小さく設定されている。
板バネ17は、方形状のバネ素材板(リン青銅板等)に段差を構成した形状をなし、段差を介した一方の平板部分が支柱板2aに固着され、他方の平板部分が抱持部材16aの中央に固着されており、抱持部材16aを監視用カメラ1の被支持面14aへ付勢するようになっている。
尚、板バネ17の支柱板2aに対する固着手段としては、例えばカーリングカシメ方法等が適用でき、抱持部材16aに対する固着手段としては、例えば抱持部材16aが樹脂製であればアウトサート成形等が適用できる。
固定ネジ18は、支柱板2aにおける板バネ17を介して抱持部材16aの中央部と対向する位置に形成されたネジ孔に螺合しており、それを締め付けることにより板バネ17を介して抱持部材16aを監視用カメラ1の被支持面14aへ強力に押圧させるようになっている。
次に、他方の支柱板2bの支持機構については、図1(B)に示されるように、単に支柱板2bに前記の抱持部材16aと同様の抱持部材16bを固着させただけの簡単な構造になっている。
そして、各支柱板2a,2bの抱持部材16a,16bは監視用カメラ1を介して対向する位置で各被支持面14a,14bを支持しており、固定ネジ18を締め付けない状態では板バネ17の付勢力によって各抱持部材16a,16bと各被支持面14a,14bとが圧接しているため、その圧接面では適度な摺動摩擦が得られることになる。
【0021】
以上に説明した監視用カメラ1の支持機構に基づいて、監視用カメラ1の回動調整と固定は次のように行うことができる。
先ず、監視用カメラ1が図1に示した初期の状態にあって、それを手動操作で図2に示すようにパン方向へα°だけ回転させると、各支柱板2a,2bの抱持部材16a,16bに対して監視用カメラ1の各被支持面14a,14bが回転方向へ摺動し、手を離しても監視カメラ1はその回転位置で静止する。
その場合、前記のように各抱持部材16a,16bと各被支持面14a,14bの圧接面では常に適度な摺動摩擦が作用するため、回転慣性によって監視用カメラ1が過度に回転してしまうようなこともなく、監視用カメラ1の出力画面の表示状態を確認しながらパン方向の調整を円滑に行える。
尚、この実施形態では、各抱持部材16a,16bの幅方向サイズと各被支持面14a,14bの周方向サイズの設定条件に基づいて、光軸を約±45°だけパン方向へ回動できるようになっていると共に、その最大回転角度では、各被支持面14a,14bと監視用カメラ1の筐体の両側面11a,11bの各交叉位置で各抱持部材16a,16bの側部が筐体の両側面11a,11bと当接し、監視用カメラ1はそれ以上回動できないようになっている。
【0022】
次に、監視用カメラ1を図1に示した初期の状態からチルト方向へβ°だけ回転させた場合を図3に示す。
この場合には、各支柱板2a,2bの抱持部材16a,16bのほぼ中心位置の回りに監視用カメラ1の各被支持面14a,14bが摺動しながら回転することになるが、各抱持部材16a,16bと各被支持面14a,14bとは球面同士の圧接関係にあるため、前記のパン方向への回転の場合と同様に適度な摺動摩擦が作用して、チルト方向への回転調整を容易に行える。
尚、この実施形態での各抱持部材16a,16bと各被支持面14a,14bとサイズ上の関係は、上記のように図1においてH2>wの関係になっているため、チルト方向について0〜90°以上の調整範囲を十分に確保できる。
【0023】
また、監視用カメラ1を図1に示した初期の状態から光軸回りにγ°だけ回転させた状態は図4(図1のX−X矢視断面に相当)で示される。
この場合においても、各抱持部材16a,16bと各被支持面14a,14bとの球面同士での圧接関係に基づいて回転調整が容易になることは、前記のパン・チルト方向の調整の場合と同様である。
但し、この場合の回転角度は、図1を参照すれば明らかなように、各抱持部材16a,16bの高さ方向の長さ:hと各被支持面14a,14bの上下に形成された各縁部(15a,15b),(15c,15d)の間隔:H2との差に対応した角度が最大範囲となる。
従来技術で説明したように、光軸回りの調整に関してはそれほど大きな範囲を必要としないが、この実施形態では実用上十分な約±20°程度の確保できている。
また、監視用カメラ1がチルト方向に90°回転した状態では取付面の傾きを補正する必要がなくなるため、抱持部材16a,16bの幅方向の寸法:wは、高さ方向の寸法:hよりも大きくなっていると共に、縁部(15a,15b),(15c,15d)の間隔:H2よりも若干小さい程度になっている。
尚、球面13と監視用カメラ1の両側面11a,11bの非交叉部分に各縁部(15a,15b),(15c,15d)を設けた理由は、監視用カメラ1を光軸回りに回転させた際に各抱持部材16a,16bが各被支持面14a,14bから外れてしまわないように、それらにストッパー機能を果たさせることにある。
【0024】
以上のように、この実施形態における監視用カメラ1の支持機構によれば、監視用カメラ1をパン・チルト方向及び光軸回りに適度な摺動摩擦を発揮させながら回動させて調整することができる。
また、前記の説明ではそれぞれの調整態様に分けて説明しているが、その支持機構は本質的には球継ぎ手の構成を利用したものであるため、前記した最大限の各回動範囲でパン・チルト方向及び光軸回りの回動動作を複合的に行わせながら、簡単な操作で所要の撮像画面を得ることができる。
【0025】
そして、監視用カメラ1の回動調整が完了すると、その状態で固定ネジ18を締め付けて各抱持部材16a,16bを監視用カメラ1側の各被支持面14a,14bに対して強力に押圧させる。
その結果、各抱持部材16a,16bと各被支持面14a,14bの摩擦力は著しく大きくなり、監視用カメラ1が調整後の状態で完全に固定される。
即ち、監視用カメラ1の調整後の固定についても、単に1本の固定ネジ18を締め付けるだけで足り、操作が極めて簡単である。
尚、この実施形態では監視用カメラ1の両側部のみを支持する構成になっているため、監視用カメラ1の筐体の上下面や後端面には障害物がなく、信号線ケーブル(図示せず)は後端面に限らず上下面からでも自由に引き出すことができる。
【0026】
ところで、前記の実施形態では、各被支持面14a,14bがなす球面13の中心を監視用カメラ1の光軸上に一致させているため、回動調整の際にモニタ側で表示される撮像画像の変化と対応させ易くなっており、特に、光軸回りの回動調整に際しては撮像画像が移動せずに画面内で回動するだけであるために都合が良い。
しかし、支持機構の機能面を考慮した場合には、前記の中心を監視用カメラ1の重心に一致させておくことも合理的である。
即ち、前記の中心が監視用カメラ1の重心からずれていると、回動中心の周りに重力のアンバランスが生じるために板バネ17のバネ定数を大きく設定して摺動摩擦を大きくしておかなければならず、また、固定後においても振動や衝撃が作用したり固定ネジ18が緩んだりすると監視用カメラ1の光軸がずれ易くなるが、前記の中心を監視用カメラ1の重心と一致させておくと、それらの不利や不具合がなく、安定した支持・固定条件が得られることになる。
従って、例えば監視用カメラ1の重心が光軸上にある場合には、その位置に前記の中心を設定すれば、理想的な支持装置を構成できる。
【0027】
また、この実施形態では、各抱持部材16a,16bの抱持面を監視用カメラ1側の各被支持面14a,14bと同一の曲率半径からなる球状凹面として密接させるようにしているが、前記の抱持面の曲率半径は各被支持面14a,14bの曲率半径よりも小さくてもよく、更には各被支持面14a,14bに対して3点以上の当接点を有するような構成としてもよい。
即ち、各被支持面14a,14bに対する抱持条件は完全な密接態様である必要はなく、周回した線接触態様や3点以上の当接態様であってもよい。
【0028】
その他、監視用カメラ1の各被支持面14a,14bを硬質プラスチックとし、各被支持面14a,14bの内の一方を軟質プラスチックで、他方を硬質プラスチックで構成すれば、軟質プラスチックを適用した被支持面側で大きな摩擦係数が得られて板バネ17のバネ定数や固定ネジ18の押圧力を小さく設定することが可能になると共に調整作業も容易になり、また硬質プラスチックを適用した被支持面側で高い精度を確保させることができる。
尚、この実施形態では、板バネ17によって抱持部材16aを被支持面14aへ付勢させているが、コイルバネと固定ネジ18との組合せで弾性機構を構成してもよく、更には、板バネやコイルバネを用いずに、抱持部材16a,16bの双方又は一方に弾性を持たせて弾性機構を実現することも可能である。
例えば、抱持部材16a自体を弾性部材で構成しておき、固定ネジ18の先端部を抱持部材16aの中央部に軸支・連結させれば、板バネ等の別個の弾性機素を用いないで支持装置を実現できる。
【0029】
【発明の効果】
本発明の撮像装置の支持装置は、以上の構成を有していることにより、次のような効果を奏する。
請求項1の発明は、撮像装置をパン・チルト方向及びその光軸回りに回動調整して固定する作業を極めて容易なものとし、監視用カメラの支持装置として適用することにより、その設置工事を飛躍的に効率化すると共に作業の安全性を高める。
また、部品点数が少なく、支持装置の小型化と軽量化を図り、製造コストの低減化も図れるという利点もある。
請求項2の発明は、支持機構が外れる条件をなくして、請求項1の支持装置を撮像装置の筐体の大きさや形状の如何を問わず適用できるようにする。
請求項3の発明は、撮像装置の光軸の調整作業を容易にし、特に、光軸回りの調整に際して効果的な条件を与える。
請求項4の発明は、外部からの振動や衝撃又は固定機構の緩みによって撮像装置の光軸が固定位置からずれてしまうことを合理的に防止する。
【図面の簡単な説明】
【図1】(A)は本発明の実施形態に係る監視用カメラとその支持装置の外観斜視図、(B)は(A)におけるX−X矢視断面図である。
【図2】監視用カメラがパン方向へ回動調整されている状態を示す監視用カメラとその支持装置の外観斜視図である。
【図3】監視用カメラがチルト方向へ回動調整されている状態を示す監視用カメラとその支持装置の外観斜視図である。
【図4】監視用カメラがその光軸回りに回動調整されている状態での断面図[図1(A)のX−X矢視断面に相当]である。
【図5】従来技術に係る監視用カメラとその支持装置の外観斜視図である。
【符号の説明】
1…監視用カメラ、1a…光軸、2…ブラケット、2a,2b…支柱板、2c…取付板、11a,11b…監視用カメラの筐体の側面、12…球面の中心、13…球面、14a,14b…被支持面、15a,15b,15c,15d…縁部、16a,16b…抱持部材、17…板バネ、18…固定ネジ、51…取付用基台、52…監視用カメラ、53…ドーム、54,55,56…ブラケット、54a,55a,56a…環状板部、54b…立設板部、55b…アーム板部、56b,56c…把持片部、57…係合片、58…固定ネジ、59,60,61…スプリングワッシャ、62…押え板、63,64…ネジ、65…信号線ケーブル、D…球面の直径、H1…監視用カメラの筐体の高さ、H2…各縁部の間隔、h…抱持部材の高さ方向の寸法、w…抱持部材の幅方向の寸法、α…光軸のパン方向への回転角度、β…光軸のチルト方向への回転角度、γ…監視用カメラの光軸回りの回転角度。
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a support device for an imaging device, and more particularly to an improvement applied to a support device for a monitoring camera installed in a state where an imaging area is fixed, to facilitate adjustment and fixing work after installation.
[0002]
[Prior art]
In recent years, surveillance cameras are often installed on walls and ceilings in commercial stores such as supermarkets and convenience stores, and inside transportation stations.
Some of the surveillance camera support devices have a pan / tilt function that allows the camera to rotate in the horizontal and vertical directions and appropriately change the imaging area. In view of cost, fixed type imaging areas which do not have such a function are often used.
[0003]
By the way, when a monitoring camera having a fixed imaging area is installed, it is often necessary to adjust the monitoring camera later by rotating the monitoring camera.
This is because the installation work and the electric wiring work are generally performed by different contractors, and after the installation work is completed, the electric wiring work is performed, and the imaging screen can be checked only at that stage. That is, in the installation work, only the optical axis of the surveillance camera is installed in a visual operation so that the optical axis is directed substantially toward the intended imaging area, and in most cases, an image of the required area cannot be displayed.
[0004]
Therefore, an adjustment mechanism capable of rotating the optical axis with a certain degree of freedom is provided in such a monitoring camera support device.
For example, FIG. 5 is a perspective view showing a monitoring camera and a supporting device thereof. In this case, a monitoring camera 52 is mounted on a mounting base 51 via a supporting device, and they are transparent. The dome 53 is made of glass or plastic.
[0005]
The above-mentioned support device has three brackets 54, 55, 56 interposed between the mounting base 51 and the monitoring camera 52 so that the monitoring camera 52 can be panned and tilted with respect to the mounting base 51. A mechanism is employed in which the monitoring camera 52 is rotated and supported so as to rotate about its optical axis.
First, the bracket 54 includes an annular plate portion 54a and two upright plate portions 54b perpendicular to the annular plate portion 54a, and an outer peripheral portion of the annular plate portion 54a is guided by an engagement piece 57 provided on the mounting base 51 side. Thus, the entire bracket 54 can rotate around an axis perpendicular to the mounting base 51.
The bracket 55 includes an annular plate portion 55a and two arm plate portions 55b perpendicular to the annular plate portion 55a. The distal end portion of each arm plate portion 55b and the distal end portion of each of the upright plate portions 54b of the bracket 54 have respective fixing screws. The bracket 55 is pivotally connected and connected at 58 so that the entire bracket 55 can rotate around the axis of each fixing screw 58.
The bracket 56 includes an annular plate portion 56a, three gripping pieces 56b for gripping the periphery of the bracket 55, and a gripping piece 56c for fixing a rear end portion of the monitoring camera 52. It can rotate about the axis of 55a.
The connecting portion between the mounting base 51 and the annular plate portion 54a of the bracket 54, the connecting portion between each of the standing plate portions 54b of the bracket 54 and each of the arm plate portions 55b of the bracket 55, and the annular plate portion 55a of the bracket 55 Corrugated spring washers 59, 60 and 61 are interposed between the bracket 56 and the annular plate portion 56a.
The annular plate portion 54a of the bracket 54 can be fixed to the mounting base 51 by tightening the holding plate 62 to the mounting base 51 with the screw 63, and is formed on the gripping piece portion 56b of the bracket 56. The bracket 56 can be fixed to the bracket 55 by screwing the screw 64 into the screw hole and pressing the annular plate portions 55a, 56a of the bracket 55 and the bracket 56.
The brackets 54, 55, and 56 are formed as hollow plate portions 54 a, 55 a, and 56 a because the signal line cable 65 is moved from the back of the monitoring camera 52 to the back of the mounting base 51. To guide.
[0006]
The adjustment and fixing of the monitoring camera 52 are performed in the following procedure while watching the image screen output by the monitoring camera 52.
(1) The required pan position is obtained by rotating the bracket 54 (or the monitoring camera 52) with respect to the mounting base 51, and the holding plate 62 is fastened with the screw 63 to fix the bracket 54.
(2) The required tilt position is obtained by rotating the bracket 55 (or the monitoring camera 52) with respect to the bracket 54, and the fixing screw 58 is tightened to fix the bracket 55.
(3) The monitor camera 52 is rotated around its optical axis to obtain a required angular position, and the annular plate 55a of the bracket 55 is pressed against the bracket 56 with the screw 64 provided on the gripping piece 56b of the bracket 56. Thus, the bracket 56 is fixed.
In each of the above procedures (1), (2), and (3), the respective spring washers 59, 60, and 61 generate an appropriate sliding state due to friction. it can.
[0007]
As described above, the support device of the monitoring camera shown in FIG. 5 is configured so that the pan direction, the tilt direction, and the angle around the optical axis can be adjusted and fixed. In general, the angle range for each adjustment is as follows. It is required that the pan direction is about ± 45 °, the tilt direction is 0 ° (horizontal) to 90 ° (vertical) or more, and the angle around the optical axis is about ± 20 °.
This means that, based on experience at the installation site, it is sufficient if about ± 45 ° is secured so that the orientation can be roughly adjusted in the pan direction. Since it is difficult to match the direction unlike the direction, it is necessary to secure a range of 0 ° to 90 °. Regarding the angle around the optical axis, the angle of the image accompanying the inclination of the mounting part such as the ceiling This is because it is sufficient if about ± 20 ° is secured for the adjustment to be performed.
[0008]
Next, as a device for adjusting the optical axis of the camera in the pan direction and the tilt direction, there are various technologies applied to a camera platform such as a photographic camera, although the device is not applied as a support device for a monitoring camera. .
In general, the pan head can be adjusted freely in the pan / tilt direction by using a ball joint, and the mounting base is fixed by locking the sphere with a set screw. As disclosed in Japanese Patent Application Laid-Open No. H11-163, there have been proposed many mechanisms devised to facilitate adjustment.
[0009]
[Patent Document 1]
JP-A-64-26094
[0010]
[Problems to be solved by the invention]
By the way, in the above-mentioned support device for the monitoring camera, degrees of freedom are given to the rotation in the pan direction and the tilt direction, and the rotation about the optical axis of the monitoring camera 52 by independent mechanisms. The support mechanism is independently formed on the rotating portion.
As a result, as shown in FIG. 5, there are disadvantages in that the number of parts is very large, the manufacturing cost is increased, and the overall weight is increased.
In addition, when the monitoring camera 52 is adjusted and fixed, as described in the above-described procedure, an independent operation in each rotation direction is required.
In particular, this type of work is often performed at a high place toward a ceiling or a wall, and there is a problem that an increase in the number of steps leads to inefficiency of work and an increase in danger.
[0011]
On the other hand, according to the adjusting / fixing mechanism relating to the pan head, the adjustment can be performed simultaneously in the pan / tilt directions, and the fixing operation can be performed only by tightening one set screw.
However, there is a problem that the mechanism cannot adjust around the optical axis of the camera, and the basic structure of a small ball joint cannot secure sufficient fixing conditions because the weight of the monitoring camera is relatively large.
Further, since the camera rotates around the camera platform, the camera largely moves during the adjustment, and if it is applied to a surveillance camera, the dome 53 shown in FIG. 5 must be enlarged. Problems arise.
[0012]
Accordingly, the present invention provides a “supporting device for an imaging device” that partially solves the problems relating to adjustment and fixing of the surveillance camera by partially utilizing a technology related to a head support mechanism. It was created for the purpose.
[0013]
[Means for Solving the Problems]
According to the present invention, a supported surface configured as a part of a spherical surface whose center is located in the housing is formed on an outer surface of each of the side walls facing each other across the optical axis in the housing of the imaging device. A support is fixed / arranged outside each supported surface of the imaging apparatus, and one of the supports is a member having a concave spherical surface formed with a radius of curvature equal to or smaller than the radius of curvature of the supported surface. And a holding member urged by the elastic force toward the supported surface side to partially hold the supported surface, and a fixing device for strongly pressing the holding member against the supported surface by a predetermined operation. A mechanism is provided, and a holding member having the same function as the holding member is provided on the other column, and a position where the holding members provided on the respective columns face each other via the imaging device. Wherein each supported surface of the imaging device is supported. According to the support device of the image device.
[0014]
The present invention realizes the same function as the ball joint mechanism applied to the camera platform by partially supporting each supported surface on the imaging device side by the holding members provided on each support.
That is, the holding members of both columns are brought into close or contact with the respective supported surfaces of the imaging device at an appropriate pressure by the elastic mechanism provided on one of the columns, and the imaging device is held by each holding member. It can rotate freely in the pan / tilt directions and around the optical axis while maintaining appropriate sliding friction while being supported.
Therefore, the rotation adjustment of the imaging device can be performed in an appropriate sliding friction state, and the adjustment work can be performed smoothly and easily in combination with the free rotation function.
Then, when the rotation adjustment of the imaging device is completed, when the fixing mechanism is operated to strongly press the holding member against the supported surface, the frictional force of each sliding support surface increases, and after the imaging device is adjusted. It is completely fixed in the state of.
The method of supplying the elastic force to the holding member is not limited to a method using an elastic member such as a leaf spring or a coil spring, but may be a method in which the holding member itself is configured as an elastic member.
[0015]
By the way, depending on the size and shape of the outer surface of each side wall of the imaging device and the setting method of the radius of curvature of the supported surface, those surfaces may not intersect.
Then, under such conditions, when the imaging device is rotated, a problem arises in that the holding member is disengaged from the supported surface and cannot be supported.
With respect to this problem, if an edge protruding from the supported surface is formed in the non-crossing portion, the edge functions as a stopper for the holding member, and the above-described problem can be solved rationally. .
When there is no non-crossing portion, the outer side surface of each side wall of the imaging device naturally functions as a stopper.
In that case, the rotation range of the imaging device is limited by the edge and the outer surface, but if the rotation range around the optical axis is limited to be smaller than the rotation range in the pan direction, the imaging device can be It is possible to prevent the angle from being erroneously shifted to a large value, or to prevent the angle from being greatly shifted due to vibration or impact.
[0016]
Further, in the present invention, if the center of the spherical surface formed by each supported surface of the imaging device is made to coincide with the optical axis of the imaging device, adjustment work for obtaining a required imaging screen becomes easy, and in particular, This is effective for adjustment around the optical axis.
Furthermore, if the center of the spherical surface formed by each supported surface of the imaging device is made coincident with the center of gravity of the imaging device, the imaging device can be supported in a state where the bias of the weight is always canceled, so that vibration or impact may be applied. It is possible to reasonably prevent the optical axis of the imaging device from being shifted from the fixed position when the fixing mechanism is loosened.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a support device of an imaging device according to the present invention will be described in detail with reference to FIGS.
First, FIG. 1A is an external perspective view of a monitoring camera and its supporting device, and FIG. 1B is a cross-sectional view taken along the line XX in FIG. 1A.
In each of the drawings, reference numeral 1 denotes a monitoring camera, 2 denotes a bracket formed as a U-shaped frame, and the monitoring camera 1 is supported by a support mechanism formed between a side portion of the monitoring camera 1 and the bracket 2.
[0018]
The support mechanism has the following features.
(1) On both side surfaces 11a and 11b of the housing parallel to the optical axis 1a of the monitoring camera 1, supported surfaces 14a and 14b formed as a part of a spherical surface 13 having a center 12 on the optical axis 1a. Is formed.
Specifically, the spherical surface 13 is limited to the range of the height of the housing of the monitoring camera 1: H1, and the half-moon-shaped bulging part whose side surface is a part of the spherical surface 13 is formed on both side surfaces of the housing. 11a and 11b, and the side surfaces of the bulging portions are the supported surfaces 14a and 14b.
[0019]
(2) In this embodiment, the housing of the monitoring camera 1 is in the form of a rectangular parallelepiped long in the optical axis direction, and the diameter D of the spherical surface 13 is set smaller than the length of the housing in the optical axis direction. However, the height of the housing is set to be larger than H1.
Accordingly, the spherical surface 13 and both side surfaces 11a and 11b of the housing intersect within the range in the longitudinal direction of the housing of the monitoring camera 1, but do not intersect at the edge in the height direction.
As will be described later, the supported surfaces 14a and 14b define the rotation range of the monitoring camera 1 in the pan / tilt directions and around the optical axis. Therefore, the non-intersecting portion, that is, the supported surface 14a , 14b are formed with edges 15a, 15b, 15c, 15d projecting from the supported surfaces 14a, 14b along the spherical surface 13, respectively.
[0020]
(3) The bracket 2 is composed of a mounting plate 2c and support plates 2a, 2b on both sides, and a support mechanism is provided in a distal end section of each support plate 2a, 2b.
First, the support mechanism of one of the support plates 2a is composed of a holding member 16a, a leaf spring 17, and a fixing screw 18.
Here, the holding member 16a is an element that directly holds the supported surface 14a on the side of the monitoring camera 1, has a substantially square planar shape, and has a contact surface with the supported surface 14a. It is a concave spherical surface corresponding to the spherical surface 13. The size in the planar shape is such that the dimension in the width direction: w is larger than the dimension in the height direction: h, and each dimension: h, w is the dimension of the supported surface 14a on the monitoring camera 1 side. The distance between the upper and lower edges 15a and 15b is set to be smaller than H2, and, as is clear from FIG. 1, the length in the width direction: w is the supported surface on the monitoring camera 1 side. It is set to be much smaller than the interval formed by the intersection line between 14a and the side surface 11a.
The leaf spring 17 has a shape in which a step is formed in a rectangular spring material plate (phosphor bronze plate or the like), and one plate portion via the step is fixed to the support plate 2a, and the other plate portion is a holding member. The monitor 16 is fixed to the center of the monitor 16a, and urges the holding member 16a toward the supported surface 14a of the monitoring camera 1.
In addition, as a means for fixing the leaf spring 17 to the support plate 2a, for example, a curling caulking method or the like can be applied. As the means for fixing to the holding member 16a, for example, if the holding member 16a is made of resin, outsert molding is used. Applicable.
The fixing screw 18 is screwed into a screw hole formed at a position facing the center of the holding member 16a via the leaf spring 17 in the support plate 2a. The holding member 16a is strongly pressed against the supported surface 14a of the monitoring camera 1.
Next, as for the support mechanism of the other support plate 2b, as shown in FIG. 1B, a simple holding member 16b similar to the above-described holding member 16a is simply fixed to the support plate 2b. It has a simple structure.
The holding members 16a and 16b of the support plates 2a and 2b support the supported surfaces 14a and 14b at positions opposed to each other via the monitoring camera 1, and when the fixing screw 18 is not tightened, the leaf spring is used. Since the holding members 16a, 16b are pressed against the supported surfaces 14a, 14b by the urging force of 17, the appropriate sliding friction is obtained on the pressed surfaces.
[0021]
Based on the support mechanism of the monitoring camera 1 described above, the rotation adjustment and fixing of the monitoring camera 1 can be performed as follows.
First, when the surveillance camera 1 is in the initial state shown in FIG. 1 and is manually rotated by α ° in the pan direction as shown in FIG. 2, the holding members of the support plates 2a and 2b are held. The supported surfaces 14a and 14b of the monitoring camera 1 slide in the rotation direction with respect to the monitoring cameras 16a and 16b, and the monitoring camera 1 stops at the rotation position even if the hands are released.
In this case, since the appropriate sliding friction always acts on the press contact surfaces between the holding members 16a and 16b and the supported surfaces 14a and 14b as described above, the monitoring camera 1 is excessively rotated by the rotational inertia. Without this, it is possible to smoothly adjust the pan direction while checking the display state of the output screen of the monitoring camera 1.
In this embodiment, the optical axis is rotated in the pan direction by about ± 45 ° based on the setting conditions of the width size of each holding member 16a, 16b and the circumferential size of each supported surface 14a, 14b. At the maximum rotation angle, the side portions of the holding members 16a, 16b at the intersections of the supported surfaces 14a, 14b and the side surfaces 11a, 11b of the housing of the monitoring camera 1 are provided. Are in contact with both side surfaces 11a and 11b of the housing, so that the monitoring camera 1 cannot rotate any more.
[0022]
Next, FIG. 3 shows a case where the monitoring camera 1 is rotated by β ° in the tilt direction from the initial state shown in FIG.
In this case, the supported surfaces 14a and 14b of the monitoring camera 1 rotate while sliding around the substantially center positions of the holding members 16a and 16b of the support plates 2a and 2b. Since the holding members 16a, 16b and the respective supported surfaces 14a, 14b are in a pressure contact relationship between the spherical surfaces, an appropriate sliding friction acts as in the case of the rotation in the pan direction, and the holding members 16a, 16b are moved in the tilt direction. Rotation adjustment can be easily performed.
Note that the relationship between the holding members 16a and 16b and the supported surfaces 14a and 14b in this embodiment in terms of size is H2> w in FIG. 1 as described above. An adjustment range of 0 to 90 ° or more can be sufficiently ensured.
[0023]
FIG. 4 (corresponding to a section taken along the line XX in FIG. 1) shows a state in which the monitoring camera 1 is rotated by γ ° around the optical axis from the initial state shown in FIG.
Also in this case, it is easy to adjust the rotation based on the pressure-contact relationship between the spherical surfaces of the holding members 16a and 16b and the supported surfaces 14a and 14b in the case of the pan / tilt adjustment described above. Is the same as
However, the rotation angle in this case is formed above and below the supported surfaces 14a and 14b, as is apparent from FIG. 1, the length h of the holding members 16a and 16b in the height direction. The maximum range is an angle corresponding to the difference between H2 and the interval between the edges (15a, 15b) and (15c, 15d).
As described in the background art, the adjustment around the optical axis does not require a large range, but in this embodiment, about ± 20 °, which is practically sufficient, can be secured.
In addition, when the monitoring camera 1 is rotated by 90 ° in the tilt direction, it is not necessary to correct the inclination of the mounting surface. Therefore, the width dimension w of the holding members 16a and 16b is the height dimension h. And the distance between the edges (15a, 15b) and (15c, 15d): slightly smaller than H2.
The reason why the edges (15a, 15b) and (15c, 15d) are provided at the non-intersecting portions of the spherical surface 13 and both side surfaces 11a and 11b of the surveillance camera 1 is that the surveillance camera 1 is rotated around the optical axis. In order to prevent the holding members 16a and 16b from coming off from the supported surfaces 14a and 14b when the holding members 16a and 16b are provided, the stopper members 16a and 16b function as stoppers.
[0024]
As described above, according to the support mechanism of the monitoring camera 1 in this embodiment, the monitoring camera 1 can be rotated and adjusted while exerting appropriate sliding friction in the pan / tilt directions and around the optical axis. it can.
In the above description, each adjustment mode is described separately. However, since the support mechanism essentially uses the configuration of the ball joint, the pan and the rotation are performed in the maximum rotation ranges described above. A required imaging screen can be obtained by a simple operation while performing the tilting operation and the rotation operation around the optical axis in a complex manner.
[0025]
When the rotation adjustment of the monitoring camera 1 is completed, in this state, the fixing screw 18 is tightened to strongly press the holding members 16a, 16b against the supported surfaces 14a, 14b of the monitoring camera 1 side. Let it.
As a result, the frictional force between the holding members 16a, 16b and the supported surfaces 14a, 14b is significantly increased, and the monitoring camera 1 is completely fixed in a state after the adjustment.
That is, the fixing of the monitoring camera 1 after the adjustment is sufficient only by tightening the single fixing screw 18, and the operation is extremely simple.
In this embodiment, since only the both sides of the surveillance camera 1 are supported, there are no obstacles on the upper and lower surfaces and the rear end surface of the housing of the surveillance camera 1, and the signal line cable (not shown). Can be freely pulled out not only from the rear end face but also from the upper and lower faces.
[0026]
In the above embodiment, since the center of the spherical surface 13 formed by the supported surfaces 14a and 14b is aligned with the optical axis of the monitoring camera 1, the image displayed on the monitor when the rotation is adjusted. It is easy to correspond to a change in the image. In particular, when the rotation around the optical axis is adjusted, the captured image only rotates in the screen without moving, which is convenient.
However, in consideration of the function of the support mechanism, it is also reasonable to keep the center coincident with the center of gravity of the monitoring camera 1.
That is, if the center is displaced from the center of gravity of the monitoring camera 1, a gravity imbalance occurs around the center of rotation, so that the spring constant of the leaf spring 17 is set large to increase the sliding friction. The optical axis of the surveillance camera 1 is liable to be displaced when vibration or impact acts or the fixing screw 18 is loosened even after the fixing, but the center coincides with the center of gravity of the surveillance camera 1. By doing so, stable supporting and fixing conditions can be obtained without such disadvantages and defects.
Therefore, for example, when the center of gravity of the monitoring camera 1 is on the optical axis, if the center is set at that position, an ideal supporting device can be configured.
[0027]
In this embodiment, the holding surfaces of the holding members 16a and 16b are closely contacted as spherical concave surfaces having the same radius of curvature as the supported surfaces 14a and 14b on the monitoring camera 1 side. The radius of curvature of the holding surface may be smaller than the radius of curvature of each of the supported surfaces 14a and 14b. Further, the holding surface may have three or more contact points with each of the supported surfaces 14a and 14b. Is also good.
That is, the holding conditions for the supported surfaces 14a and 14b do not need to be in a completely close state, but may be in a line contact state in which they are rotated or in a contact state of three or more points.
[0028]
In addition, if each of the supported surfaces 14a and 14b of the surveillance camera 1 is made of a hard plastic, one of the supported surfaces 14a and 14b is made of a soft plastic and the other is made of a hard plastic, the soft plastic is applied. A large coefficient of friction is obtained on the support surface side, so that the spring constant of the leaf spring 17 and the pressing force of the fixing screw 18 can be set small, and the adjustment work becomes easy, and the supported surface made of hard plastic is applied. High accuracy can be ensured on the side.
In this embodiment, the holding member 16a is urged toward the supported surface 14a by the leaf spring 17, but an elastic mechanism may be constituted by a combination of the coil spring and the fixing screw 18; Instead of using a spring or a coil spring, both or one of the holding members 16a and 16b may have elasticity to realize an elastic mechanism.
For example, if the holding member 16a itself is made of an elastic member and the tip of the fixing screw 18 is pivotally connected to the center of the holding member 16a, a separate elastic element such as a leaf spring can be used. Without a supporting device.
[0029]
【The invention's effect】
The support device for an imaging device according to the present invention has the following configuration, and thus has the following effects.
According to the first aspect of the present invention, the work of pivotally adjusting and fixing the imaging device in the pan / tilt direction and its optical axis is extremely easy, and is applied as a support device for a surveillance camera. Dramatically improve efficiency and enhance work safety.
Further, there are advantages that the number of parts is small, the size and weight of the supporting device can be reduced, and the manufacturing cost can be reduced.
According to a second aspect of the present invention, the support device of the first aspect can be applied regardless of the size and shape of the housing of the imaging device by eliminating the condition that the support mechanism comes off.
The invention according to claim 3 facilitates the adjustment work of the optical axis of the imaging device, and particularly provides an effective condition for adjustment around the optical axis.
The invention according to claim 4 rationally prevents the optical axis of the imaging device from being shifted from the fixed position due to external vibration or shock or loosening of the fixing mechanism.
[Brief description of the drawings]
FIG. 1A is an external perspective view of a monitoring camera and a supporting device thereof according to an embodiment of the present invention, and FIG. 1B is a cross-sectional view taken along line XX in FIG.
FIG. 2 is an external perspective view of the surveillance camera and its supporting device, showing a state where the surveillance camera is adjusted to rotate in a pan direction.
FIG. 3 is an external perspective view of the monitoring camera and a supporting device thereof, showing a state in which the monitoring camera is rotationally adjusted in a tilt direction.
FIG. 4 is a cross-sectional view (corresponding to a cross-section taken along line XX of FIG. 1A) in a state where the monitoring camera is rotated and adjusted around its optical axis.
FIG. 5 is an external perspective view of a monitoring camera and a supporting device thereof according to the related art.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Surveillance camera, 1a ... Optical axis, 2 ... Bracket, 2a, 2b ... Prop plate, 2c ... Mounting plate, 11a, 11b ... Side surface of housing of surveillance camera, 12 ... Center of spherical surface, 13 ... Spherical surface, 14a, 14b: supported surface, 15a, 15b, 15c, 15d: edge, 16a, 16b: holding member, 17: leaf spring, 18: fixing screw, 51: mounting base, 52: monitoring camera, 53: dome, 54, 55, 56: bracket, 54a, 55a, 56a: annular plate, 54b: standing plate, 55b: arm plate, 56b, 56c: gripping piece, 57: engaging piece, 58 ... fixing screws, 59, 60, 61 ... spring washers, 62 ... holding plates, 63, 64 ... screws, 65 ... signal line cables, D ... spherical diameter, H1 ... height of the surveillance camera housing, H2 ... Interval of each edge, h ... in the height direction of the holding member Law, w ... widthwise dimension of the holding member, alpha ... rotation angle of the panning direction of the optical axis, beta ... rotation angle in the tilt direction of the optical axis, gamma ... optical axis of the rotation angle of the monitoring camera.

Claims (4)

撮像装置の筐体における光軸を挟んで対向する各側壁の外側面に、中心が前記筐体内に位置する球面の一部として構成された被支持面をそれぞれ形成しておくと共に、前記撮像装置の各被支持面の外側に支柱をそれぞれ固定・配設せしめ、
その一方の支柱には、前記被支持面の曲率半径以下の曲率半径で形成された凹状球面を有する部材であって、前記被支持面側へ弾性力で付勢され、前記被支持面を部分的に抱持する抱持部材と、一定の操作によって前記抱持部材を前記被支持面へ強力に押圧させる固定機構とを設け、
また、他方の支柱には、前記抱持部材と同機能の抱持部材を設け、
前記の各支柱に設けた各抱持部材が前記撮像装置を介して相互に対向する位置において前記撮像装置の各被支持面を支持することを特徴とする撮像装置の支持装置。
On the outer surface of each of the side walls facing each other across the optical axis in the housing of the imaging device, a supported surface formed as a part of a spherical surface whose center is located in the housing is formed, and the imaging device is formed. Fixing and arranging the struts outside each supported surface of
One of the pillars is a member having a concave spherical surface formed with a radius of curvature equal to or smaller than the radius of curvature of the supported surface, and is urged by the elastic force toward the supported surface to partially support the supported surface. Provide a holding mechanism to hold and a fixing mechanism for strongly pressing the holding member against the supported surface by a certain operation,
In addition, the other pillar is provided with a holding member having the same function as the holding member,
A supporting device for an imaging device, wherein each holding member provided on each of the columns supports each supported surface of the imaging device at a position facing each other via the imaging device.
前記撮像装置の被支持面が前記撮像装置の側壁の外側面と交叉しない場合において、その非交叉部分に前記被支持面から突出した縁部を形成することとした請求項1に記載の撮像装置の支持装置。2. The imaging device according to claim 1, wherein when the supported surface of the imaging device does not intersect with the outer side surface of the side wall of the imaging device, an edge protruding from the supported surface is formed at a non-intersecting portion. Support device. 前記撮像装置の各被支持面がなす球面の中心を、前記撮像装置の光軸上に一致させた請求項1又は請求項2に記載の撮像装置の支持装置。The support device of the imaging device according to claim 1, wherein a center of a spherical surface formed by each supported surface of the imaging device coincides with an optical axis of the imaging device. 前記撮像装置の各被支持面がなす球面の中心を、前記撮像装置の重心と一致させた請求項1又は請求項2に記載の撮像装置の支持装置。The support device for an imaging device according to claim 1, wherein a center of a spherical surface formed by each supported surface of the imaging device is matched with a center of gravity of the imaging device.
JP2002274189A 2002-09-20 2002-09-20 Supporting apparatus for imaging apparatus Pending JP2004112553A (en)

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