JPH08294026A - Image pickup device for monitor - Google Patents

Abstract

PURPOSE: To make an image pickup device inconspicuous with respect to a surrounding environment of an installed location by miniaturizing a monitor camera provided with sound components having a speaker and a microphone function. CONSTITUTION: A flat vibration type acoustic component 8 having a speaker and microphone function is fitted closely to an inner wall of an enclosed camera case 2 containing a camera main body 1. When the acoustic component 8 is vibrated, the vibration is delivered from an acoustic element mount wall face 2a to other wall faces 2b, 2c, and a sound wave is emitted from the entire wall faces or the sound from the entire circumference of the camera case 2 is collected by the acoustic component 8. Furthermore, the vibration is delivered to a protection hood 4, from which deposited snow is shaken off.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】この発明は、スピーカーやマイク
ロフォンのような発音又は集音機能を有する音響素子を
備えた監視用撮像装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surveillance image pickup apparatus having an acoustic element such as a speaker or a microphone having a sound producing or sound collecting function.

【０００２】[0002]

【従来の技術】図１１、図１２は従来の監視用撮像装置
を示し、図１１は斜視図、図１２は側断面図である。図
において、１はビデオカメラ等の撮像装置本体である撮
像部、２は撮像部１を収納するカメラケース等の密閉容
器、３は密閉容器２のガラス等の透明窓、４は保護用フ
ード、５は保護用フード４を密閉容器２に支持するため
の支持具、６はスピーカー、マイクロフォン等の発音又
は集音機能を有する音響素子、６ａは音響素子６を保護
用フード４に取り付けるための取付金具、７は支持具５
により形成された密閉容器２と保護用フード４間の間隙
である。11 and 12 show a conventional monitoring image pickup device, FIG. 11 is a perspective view, and FIG. 12 is a side sectional view. In the figure, 1 is an image pickup unit which is a main body of an image pickup device such as a video camera, 2 is a closed container such as a camera case which houses the image pickup unit 1, 3 is a transparent window such as glass of the closed container 2, 4 is a protective hood, Reference numeral 5 is a support for supporting the protective hood 4 on the closed container 2, 6 is an acoustic element having a sounding or collecting function such as a speaker or a microphone, and 6a is an attachment for attaching the acoustic element 6 to the protective hood 4. Metal fittings, 7 is support tool 5
It is a gap between the closed container 2 and the protective hood 4 formed by.

【０００３】次に動作について説明する。撮像部１は屋
外に設置する場合、風雨を避けるため密閉された容器２
内に収納され、被写体は透明窓３を介して撮影される。
また、支持具５によって密閉容器２と保護用フード４間
に形成される間隙７を通る空気流により断熱層が形成さ
れ、日光の幅射熱の影響による密閉容器２の内部温度の
上昇が軽減される。Next, the operation will be described. When the imaging unit 1 is installed outdoors, it is a closed container 2 to avoid wind and rain.
It is housed inside and the subject is photographed through the transparent window 3.
In addition, the heat insulating layer is formed by the air flow passing through the gap 7 formed between the closed container 2 and the protective hood 4 by the support tool 5, and the rise in the internal temperature of the closed container 2 due to the influence of the radiant heat of sunlight is reduced. To be done.

【０００４】ここで、保護用フード４の側面に取付金具
６ａで取り付けられた音響素子６が、スピーカーとして
の発音機能やマイクロフォンとしての集音機能に切換え
られることによって、被写体や撮像装置周辺に対し音声
が送出（発音）されたり、音声が収集（集音）される。
例えば道路上の違法駐車監視用撮像装置では、違反車に
対し注意の音声が送られ、異常音の収集が行なわれ、ダ
ム下流の監視用撮像装置では、放流のサイレン音の発射
や、異常放流音の収集が行なわれる。Here, the acoustic element 6 mounted on the side surface of the protective hood 4 by the mounting bracket 6a is switched to a sound producing function as a speaker or a sound collecting function as a microphone, so that the subject and the surroundings of the image pickup device are exposed. Voice is transmitted (pronounced) or voice is collected (collected).
For example, an imager for illegal parking monitoring on the road sends a warning voice to a violating vehicle and collects an abnormal sound, and an imager for monitoring downstream of the dam emits a siren sound of the release or an abnormal release. Sound collection is performed.

【０００５】[0005]

【発明が解決しようとする課題】従来の監視用撮像装置
は以上のように構成され、音響素子６が密閉容器２や保
護用フード４の外部に取り付けられるので、どうしても
全体が大型となり目立ち、撮像装置設置場所の周囲環境
の景観を損なうという問題点があった。The conventional monitoring image pickup device is constructed as described above, and since the acoustic element 6 is attached to the outside of the hermetically sealed container 2 and the protective hood 4, the whole is inevitably large in size, and the image pickup is performed. There is a problem that the surrounding environment of the device installation place is impaired.

【０００６】この発明は上記のような問題点を解消する
ためになされたもので、音響素子を備えた撮像装置全体
を小型化し、設置場所の周囲環境に対し目立たない監視
用撮像装置を得ることを目的とする。The present invention has been made in order to solve the above-mentioned problems, and it is possible to obtain a monitoring image pickup device which is compact in size and which is inconspicuous with the surrounding environment of the installation place. With the goal.

【０００７】[0007]

【課題を解決するための手段】この発明にかかる監視用
撮像装置は、撮像部を収納した密閉容器の内壁に発音及
び集音機能を有する平板振動形の音響素子を密着して取
付けたものである。According to the present invention, there is provided a surveillance image pickup device in which a flat plate vibration type acoustic element having a sound producing and sound collecting function is closely attached to an inner wall of a closed container containing an image pickup section. is there.

【０００８】また、密閉容器の音響素子取付け部を他よ
り薄肉としたものである。The acoustic element mounting portion of the closed container is thinner than the others.

【０００９】また、密閉容器に開口を設け、この開口を
塞ぐ薄板の内側に発音及び集音機能を有する平板振動形
の音響素子を密着して取付けたものである。Further, an opening is provided in the closed container, and a flat plate vibration type acoustic element having a sound producing and sound collecting function is closely attached to the inside of a thin plate closing the opening.

【００１０】さらに、密閉容器の音響素子取付け部の外
側をホーン形状としたものである。Further, the outside of the acoustic element mounting portion of the closed container is formed into a horn shape.

【００１１】さらにまた、密閉容器の少なくとも上側を
覆う保護用フードに一体にホーン形状部を設け、このホ
ーン形状部を密閉容器の音響素子取付け部の外側に当接
するよう上記保護用フードを上記密閉容器に取付けたも
のである。Further, a horn-shaped portion is integrally provided on a protective hood that covers at least the upper side of the hermetically sealed container, and the protective hood is hermetically sealed so that the horn-shaped portion abuts the outside of the acoustic element mounting portion of the hermetically sealed container. It is attached to the container.

【００１２】[0012]

【作用】この発明においては、撮像部を収納した密閉容
器の内壁に密着して取付けられた音響素子が振動する
と、その振動が音響素子取付け壁面から他の壁面に伝達
され、全壁面から音波が放射されるか、密閉容器の全周
囲からの音が音響素子によって集音される。According to the present invention, when the acoustic element closely attached to the inner wall of the hermetically-sealed container accommodating the image pickup section vibrates, the vibration is transmitted from the acoustic element mounting wall surface to another wall surface, and sound waves are generated from all the wall surfaces. Sound that is emitted or from the entire circumference of the closed container is collected by the acoustic element.

【００１３】また、密閉容器の音響素子取付け部を他よ
り薄肉としたので、音響素子取付け部方向への放射音圧
及び集音感度が、特に低音域において上昇する。Further, since the acoustic element mounting portion of the closed container is made thinner than the others, the radiated sound pressure and the sound collecting sensitivity in the acoustic element mounting portion direction are increased especially in the low frequency range.

【００１４】さらに、音響素子取付け部を、密閉容器本
体とは別の薄板としたので、所望音響特性を得るため
の、音響素子取付け部の薄肉化がさらに容易となる。Furthermore, since the acoustic element mounting portion is a thin plate different from the closed container body, it is easier to make the acoustic element mounting portion thinner in order to obtain desired acoustic characteristics.

【００１５】さらにまた、音響素子取付け部の外側の、
密閉容器又は保護用フードにホーン形状部を設けたの
で、音響素子取付け部方向に指向性の高い放射音圧及び
集音感度が得られる。Furthermore, on the outside of the acoustic element mounting portion,
Since the horn-shaped portion is provided in the closed container or the protective hood, it is possible to obtain a radiated sound pressure and sound collection sensitivity with high directivity in the acoustic element mounting portion direction.

【００１６】[0016]

【実施例】【Example】

実施例１．以下、この発明の一実施例を図について説明
する。図１、図２は実施例１を示し、図１は斜視図、図
２は側断面図である。図において、１は撮像部、２は密
閉容器、３は透明窓、４は保護用フード、５はフード支
持具で以上は図１１、図１２で示す従来例と同様のもの
である。２ａは密閉容器２の前板、２ｃは密閉容器２の
後板、２ｂは密閉容器２の底板、８は、密閉容器２の前
板２ａ内壁に密着されて取付けられた、発音または集音
機能を有する平板形の音響素子である。Example 1. An embodiment of the present invention will be described below with reference to the drawings. 1 and 2 show Embodiment 1, FIG. 1 is a perspective view, and FIG. 2 is a side sectional view. In the figure, 1 is an imaging unit, 2 is a closed container, 3 is a transparent window, 4 is a protective hood, and 5 is a hood support, which are the same as those of the conventional example shown in FIGS. Reference numeral 2a is a front plate of the closed container 2, 2c is a rear plate of the closed container 2, 2b is a bottom plate of the closed container 2, and 8 is a sounding or sound collecting function which is attached in close contact with the inner wall of the front plate 2a of the closed container 2. It is a flat plate type acoustic element having.

【００１７】ここで、音響素子８を発音素子として使用
した場合、音響素子８の振動によりこれに密着している
前板２ａが共振し、前面方向つまり撮像部１の被写体撮
影方向に音波Ｗ１が放射され、更に前板２ａの振動が密
閉容器２の各壁面に伝達され例えば底板２ｂからは音波
Ｗ２が、後板２ｃからは音波Ｗ３が放射され、この結果
密閉容器２は防水性を兼ね備えた無指向性の発音体とな
る。When the acoustic element 8 is used as a sounding element, the vibration of the acoustic element 8 causes the front plate 2a that is in close contact with the acoustic element 8 to resonate, and the sound wave W1 is emitted in the front direction, that is, in the object photographing direction of the image pickup section 1. The vibration of the front plate 2a is further radiated and transmitted to each wall surface of the closed container 2, and for example, the sound wave W2 is emitted from the bottom plate 2b and the sound wave W3 is emitted from the rear plate 2c, and as a result, the closed container 2 is also waterproof. It becomes an omnidirectional sounding body.

【００１８】また、撮像装置が雪の多い地域に設置され
た場合、保護用フード４の上に雪が積もり撮像装置に雪
荷重が加わるが、音響素子８を保護用フード４が共振す
る周波数で励振することにより、音響素子８による振動
が密閉容器２の壁面、支持具５を通し保護用フード４に
伝わりこれを振動させ、その上の積雪が振るい落とされ
る。こうして、撮像装置の強度に影響する積雪が除去さ
れる。When the image pickup device is installed in an area with a lot of snow, snow accumulates on the protective hood 4 and a snow load is applied to the image pickup device, but the acoustic element 8 is excited at a frequency at which the protective hood 4 resonates. By doing so, the vibration due to the acoustic element 8 is transmitted to the protective hood 4 through the wall surface of the hermetically sealed container 2 and the support tool 5, and vibrates the hood 4, so that the snow on it is shaken off. In this way, snowfall that affects the strength of the imaging device is removed.

【００１９】以上のように、従来外部に取付けられてい
た音響素子が密閉容器２の内壁に密着して取付けられた
ので、装置全体が小型化し、周囲環境の景観に対する影
響が少なくなる。さらに音響素子８による振動で保護用
フード４上の積雪が除去されるので降雪地帯での撮像装
置の屋外使用が可能となる。As described above, since the acoustic element which has been conventionally mounted on the outside is closely attached to the inner wall of the hermetically sealed container 2, the size of the entire apparatus is reduced and the influence on the landscape of the surrounding environment is reduced. Further, since the snow accumulated on the protective hood 4 is removed by the vibration caused by the acoustic element 8, the image pickup apparatus can be used outdoors in a snowfall area.

【００２０】上記の例では音響素子８が発音体である場
合を説明したが、音響素子８の機能を切り換えマイクロ
フォンのような集音体にした場合は、逆の動作原理が可
能となる。つまり、撮像装置の周囲の音は密閉容器２の
各面つまり前板２ａ、底板２ｂ、後板２ｃの壁面の振動
により集音、伝達され音響素子８に取り込まれ、この結
果音響素子８は無指向性の集音体として動作する。In the above example, the case where the acoustic element 8 is a sounding body has been described, but when the function of the acoustic element 8 is switched to a sound collecting body such as a microphone, the reverse operation principle is possible. That is, the sound around the image pickup device is collected and transmitted by the vibration of each surface of the closed container 2, that is, the wall surfaces of the front plate 2a, the bottom plate 2b, and the rear plate 2c, and is taken into the acoustic element 8. As a result, the acoustic element 8 does not exist. Operates as a directional sound collector.

【００２１】実施例２．図３、図４はこの発明の実施例
２を示し、図３は斜視図、図４は側断面図である。図に
おいて、１は撮像部、３は透明窓、４は保護用フード、
５はフード支持具、８は音響素子で、以上は図１、図２
で示す実施例１と同様のものである。９は密閉容器、９
ａは密閉容器９の前板、９ｂは密閉容器９の底板、９ｃ
は密閉容器９の後板、９ｄは前板９ａの一部を他より薄
肉とした音響素子８取付け部である。Example 2. 3 and 4 show Embodiment 2 of the present invention, FIG. 3 is a perspective view, and FIG. 4 is a side sectional view. In the figure, 1 is an imaging unit, 3 is a transparent window, 4 is a protective hood,
Reference numeral 5 is a hood support, and 8 is an acoustic element.
The same as Example 1 shown in FIG. 9 is a closed container, 9
a is a front plate of the closed container 9, 9b is a bottom plate of the closed container 9, and 9c
Is a rear plate of the closed container 9, and 9d is an acoustic element 8 mounting portion in which a part of the front plate 9a is thinner than the other part.

【００２２】密閉容器９は強度を保持するのに必要な板
厚を有しているが、薄肉部９ｄはその板厚に比べ薄く構
成されているため、薄肉部９ｄの共振周波数は低い領域
にあり、かつ振幅を大きく取ることが可能となる。この
ため音響素子８を発音体として使用した場合、音響素子
８の振動の伝達により前面つまり被写体方向に放射され
る音波Ｗ１は、その他の方向例えば底板９ｂの音波Ｗ２
や後板９ｃの音波Ｗ３に比べ周波数帯域を低域側に広
く、かつ音圧を大きくすることが可能となる。Although the closed container 9 has a plate thickness necessary for maintaining strength, the thin portion 9d is thinner than the plate thickness, so that the resonance frequency of the thin portion 9d is in a low region. It is possible to obtain a large amplitude. Therefore, when the acoustic element 8 is used as a sounding body, the sound wave W1 radiated toward the front surface, that is, the direction of the subject by the transmission of the vibration of the acoustic element 8 is the sound wave W2 of the other direction, for example, the sound wave W2 of the bottom plate 9b.
As compared with the sound wave W3 of the rear plate 9c, the frequency band can be widened to the low frequency side and the sound pressure can be increased.

【００２３】以上のように、この実施例２でも防水構造
を持った撮像装置の小型化が可能で、さらに内蔵する音
響素子の音質を向上させることができる。As described above, also in the second embodiment, the image pickup device having the waterproof structure can be downsized, and the sound quality of the built-in acoustic element can be improved.

【００２４】また、音響素子８を集音体として使用した
場合は、前面つまり被写体方向からの音はその他の面の
方向の音よりも高感度で集音され、この結果指向性マイ
クロフォンと同様の機能の集音体を得ることができる。When the acoustic element 8 is used as a sound collector, the sound from the front surface, that is, the direction of the object is collected with higher sensitivity than the sound in the direction of the other surface, and as a result, the sound is similar to that of the directional microphone. A sound collector with a function can be obtained.

【００２５】実施例３．図５、図６はこの発明の実施例
３を示し、図５は斜視図、図６は側断面図である。図に
おいて、１は撮像部、３は透明窓、４は保護用フード、
５はフード支持具、８は音響素子で、以上は図１、図２
で示す実施例１と同様のものである。１０は密閉容器、
１０ａは密閉容器１０の前板、１０ｂは密閉容器１０の
底板、１０ｃは密閉容器１０の後板、１０ｄは前板１０
ａの一部に設けられた開口、１１はこの開口１０ｄを塞
ぐ薄板で、それの内側に音響素子８が密着して取付けら
れている。Example 3. 5 and 6 show Embodiment 3 of the present invention, FIG. 5 is a perspective view, and FIG. 6 is a side sectional view. In the figure, 1 is an imaging unit, 3 is a transparent window, 4 is a protective hood,
Reference numeral 5 is a hood support, and 8 is an acoustic element.
The same as Example 1 shown in FIG. 10 is a closed container,
10a is a front plate of the closed container 10, 10b is a bottom plate of the closed container 10, 10c is a rear plate of the closed container 10, and 10d is a front plate 10.
An opening 11 provided in a part of a is a thin plate that closes the opening 10d, and the acoustic element 8 is attached in close contact with the inside thereof.

【００２６】実施例２では密閉容器９の音響素子８取付
け部９ｄを他より薄肉としたが、この薄肉処理ができな
い場合は、この実施例３のように、密閉容器１０の前板
１０ａに開口１０ｄを設け、これを薄板１１で塞ぎ、こ
の薄板１１に音響素子８を取付けることによって、実施
例２と同様の機能及び作用効果を得ることができる。In the second embodiment, the acoustic element 8 mounting portion 9d of the closed container 9 is made thinner than the others, but if this thin processing cannot be performed, the front plate 10a of the closed container 10 is opened as in the third embodiment. By providing 10d, closing this with a thin plate 11, and attaching the acoustic element 8 to this thin plate 11, it is possible to obtain the same functions and effects as those of the second embodiment.

【００２７】実施例４．図８、図９はこの発明の実施例
４を示し、図８は斜視図、図９は側断面図である。図に
おいて、１は撮像部、３は透明窓、４は保護用フード、
５はフード支持具、８は音響素子で、以上は図１、図２
で示す実施例１と同様のものである。１２は密閉容器、
１２ａは密閉容器１２の前板、１２ｂは前板１２ａに設
けられたホーン形状部、１２ｃは音響素子８の取付け部
である。Example 4. 8 and 9 show Embodiment 4 of the present invention, FIG. 8 is a perspective view, and FIG. 9 is a side sectional view. In the figure, 1 is an imaging unit, 3 is a transparent window, 4 is a protective hood,
Reference numeral 5 is a hood support, and 8 is an acoustic element.
The same as Example 1 shown in FIG. 12 is a closed container,
Reference numeral 12a is a front plate of the closed container 12, 12b is a horn-shaped portion provided on the front plate 12a, and 12c is a mounting portion of the acoustic element 8.

【００２８】実施例２では密閉容器９の音響素子取付け
部９ｄを他より薄肉としたが、さらに被写体方向の音の
放射または集音時の指向性を高めたい場合は、この実施
例４のように、音響負荷の掛けやすいホーン形状部１２
ｂを密閉容器１２の前板１２ａに設け、それの底部の音
響素子取付け部１２ｃの内側面に音響素子８を取付ける
ことによって、実施例２よりはさらに指向性の高い発音
体、集音体が得られる。In the second embodiment, the acoustic element mounting portion 9d of the closed container 9 is made thinner than the others, but if it is desired to further increase the directivity of the sound emitted toward the subject or when collecting the sound, it is the same as in the fourth embodiment. The horn-shaped part 12 is easy to apply acoustic load to
By providing b on the front plate 12a of the closed container 12 and mounting the acoustic element 8 on the inner surface of the acoustic element mounting portion 12c at the bottom thereof, a sounding body and a sound collecting body having higher directivity than in the second embodiment can be obtained. can get.

【００２９】また、実施例４では音響素子８の取付け部
１２ｃが、ホーン形状部１２ｂと同じ板厚で、かつ一体
構造となっているが、この取付け部１２ｃを実施例２の
薄肉部９ｄと同様にホーン１２ｂの板厚よりも薄肉構造
としたり、実施例３の薄板１１と同様にホーン１２ｂと
別体の薄板とすることにより、音域の拡大、音圧の増加
など更なる音質の向上を図ることが可能となる。In the fourth embodiment, the mounting portion 12c of the acoustic element 8 has the same plate thickness as the horn-shaped portion 12b and has an integral structure. The mounting portion 12c is the thin-walled portion 9d of the second embodiment. Similarly, by making the structure thinner than the thickness of the horn 12b, or by using a thin plate separate from the horn 12b like the thin plate 11 of the third embodiment, further improvement of sound quality such as expansion of sound range and increase of sound pressure can be achieved. It is possible to plan.

【００３０】実施例５．図１０、図１１はこの発明の実
施例５を示し、図１０は斜視図、図１１は側断面図であ
る。図において、１は撮像部、３は透明窓、５はフード
支持具、８は音響素子で、以上は図１、図２で示す実施
例１と同様のものである。１３は保護用フード、１３ａ
は保護用フード１３の前板、１３ｂは前板１３ａに一体
に設けられたホーン形状部、１４は密閉容器、１４ａは
音響素子８の取付部である。Example 5. 10 and 11 show Embodiment 5 of the present invention, FIG. 10 is a perspective view, and FIG. 11 is a side sectional view. In the figure, 1 is an imaging unit, 3 is a transparent window, 5 is a hood support, and 8 is an acoustic element, and the above is the same as that of the first embodiment shown in FIGS. 13 is a protective hood, 13a
Is a front plate of the protective hood 13, 13b is a horn-shaped portion integrally provided on the front plate 13a, 14 is a closed container, and 14a is a mounting portion of the acoustic element 8.

【００３１】実施例４では密閉容器側にホーン形状部が
設けられたが、この実施例では保護用フード１３に前板
部１３ａが設けられ、この前板部１３ａに一体にホーン
形状部１３ｂが、密閉容器前板１４ａの音響素子８取付
け部の外側に当接するよう設けられている。これによっ
て、被写体方向の音の放射または集音時の指向性がさら
に高められる。In the fourth embodiment, the horn-shaped portion is provided on the closed container side. In this embodiment, the protective hood 13 is provided with the front plate portion 13a, and the front plate portion 13a is integrally provided with the horn-shaped portion 13b. It is provided so as to come into contact with the outside of the acoustic element 8 mounting portion of the closed container front plate 14a. As a result, sound radiation toward the subject or directivity at the time of sound collection is further enhanced.

【００３２】また、実施例５では音響素子８の取付け部
１４ａが、密閉容器１４の他の部分と同板厚でかつ一体
構造となっているが、この取付け部１４ａを実施例２の
薄肉部９ｄと同様に他の部分の板厚よりも薄肉構造とし
たり、実施例３の薄板１１と同様に密閉容器１４とは別
体の薄板とすることにより、音域の拡大、音圧の増加な
ど更なる音質の向上を図ることが可能となる。Further, in the fifth embodiment, the mounting portion 14a of the acoustic element 8 has the same plate thickness as the other portion of the closed container 14 and has an integral structure, but the mounting portion 14a is the thin portion of the second embodiment. As in the case of 9d, by making the structure thinner than the thickness of the other parts, or by forming a thin plate separate from the closed container 14 like the thin plate 11 of Example 3, it is possible to further increase the sound range and increase the sound pressure. It becomes possible to improve the sound quality.

【００３３】[0033]

【発明の効果】この発明の請求項１記載の発明は以上説
明したように、撮像部を収納した密閉容器の内壁に発音
及び集音機能を有する平板振動形の音響素子を密着して
取付けたので、小型で内蔵する音響素子の音質ならびに
音響効率の高い防水構造を持った監視用撮像装置が得ら
れる効果がある。As described above, according to the first aspect of the present invention, the plate vibrating acoustic element having the sound producing and sound collecting functions is closely attached to the inner wall of the closed container accommodating the image pickup section. Therefore, there is an effect that a small-sized monitoring image pickup apparatus having a waterproof structure with high sound quality of the built-in acoustic element and high acoustic efficiency can be obtained.

【００３４】請求項２記載の発明は以上説明したよう
に、請求項１記載の発明において、密閉容器の音響素子
取付け部を他より薄肉としたので、音響素子取付け部方
向への放射音圧及び集音感度が、特に低音域において上
昇する監視用撮像装置が得られる効果がある。As described above, according to the invention of claim 2, in the invention of claim 1, since the acoustic element mounting portion of the hermetically sealed container is thinner than the other parts, the radiated sound pressure toward the acoustic element mounting portion and There is an effect that a monitoring image pickup device whose sound collection sensitivity is increased particularly in a low sound range can be obtained.

【００３５】請求項３記載の発明は以上説明したよう
に、密閉容器に開口を設け、この開口を塞ぐ薄板の内側
に発音及び集音機能を有する平板振動形の音響素子を密
着して取付けたので、音響素子取付け部の薄肉化がさら
に容易となり、より音響特性の良好な監視用撮像装置が
得られる効果がある。As described above, according to the third aspect of the present invention, an opening is provided in the closed container, and a flat plate vibration type acoustic element having a sound producing and collecting function is closely attached to the inside of the thin plate closing the opening. Therefore, it is easier to reduce the thickness of the acoustic element mounting portion, and it is possible to obtain the monitoring image pickup apparatus having better acoustic characteristics.

【００３６】請求項４記載の発明は以上説明したよう
に、請求項１、２或は３記載の発明において、密閉容器
の音響素子取付け部の外側をホーン形状としたので、ま
た、請求項５記載の発明は、密閉容器の少なくとも上側
を覆う保護用フードに一体にホーン形状部を設け、この
ホーン形状部を密閉容器の音響素子取付け部の外側に当
接するよう上記保護用フードを上記密閉容器に取付けた
ので、音響素子取付け部方向に高い指向性を持った監視
用撮像装置が得られる効果がある。As described above, in the invention of claim 4, in the invention of claim 1, 2 or 3, the outside of the acoustic element mounting portion of the hermetically sealed container has a horn shape. In the invention described above, a horn-shaped portion is provided integrally with a protective hood that covers at least the upper side of the closed container, and the protective hood is provided so that the horn-shaped portion abuts the outside of the acoustic element mounting portion of the closed container. Since it is mounted on the monitor device, there is an effect that a monitoring image pickup device having a high directivity in the acoustic element mounting portion direction can be obtained.

【図面の簡単な説明】[Brief description of drawings]

【図１】 実施例１の斜視図。FIG. 1 is a perspective view of a first embodiment.

【図２】 実施例１の側断面図。FIG. 2 is a side sectional view of the first embodiment.

【図３】 実施例２の斜視図。FIG. 3 is a perspective view of the second embodiment.

【図４】 実施例２の側断面図。FIG. 4 is a side sectional view of the second embodiment.

【図５】 実施例３の斜視図。FIG. 5 is a perspective view of the third embodiment.

【図６】 実施例３の側断面図。FIG. 6 is a side sectional view of the third embodiment.

【図７】 実施例４の斜視図。FIG. 7 is a perspective view of a fourth embodiment.

【図８】 実施例４の側断面図。FIG. 8 is a side sectional view of the fourth embodiment.

【図９】 実施例５の斜視図。FIG. 9 is a perspective view of a fifth embodiment.

【図１０】 実施例５の側断面図。FIG. 10 is a side sectional view of the fifth embodiment.

【図１１】 従来の監視用撮像装置の斜視図。FIG. 11 is a perspective view of a conventional monitoring imaging device.

【図１２】 従来の監視用撮像装置の側断面図。FIG. 12 is a side sectional view of a conventional monitoring imaging device.

【符号の説明】[Explanation of symbols]

１ 撮像部、２，９，１０，１２，１４ 密閉容器、
４，１３ 保護用フード、８ 音響素子、９ｄ，１２
ｃ，１４ａ 音響素子取付部、１０ｄ 開口、１１薄
板、１２ｂ，１３ｂ ホーン形状部。1 Imaging unit, 2, 9, 10, 12, 14 Closed container,
4, 13 Protective hood, 8 acoustic elements, 9d, 12
c, 14a Acoustic element mounting portion, 10d opening, 11 thin plate, 12b, 13b Horn-shaped portion.

Claims (5)

【特許請求の範囲】[Claims] 【請求項１】 撮像部を密閉容器内に収納してなる監視
用撮像装置において、上記密閉容器の内壁に発音及び集
音機能を有する平板振動形の音響素子を密着して取付け
たことを特徴とする監視用撮像装置。1. A monitoring image pickup device in which an image pickup section is housed in a closed container, wherein a flat-plate vibrating acoustic element having sound and sound collecting functions is closely attached to an inner wall of the closed container. And the imaging device for monitoring. 【請求項２】 密閉容器の音響素子取付け部を他より薄
肉としたことを特徴とする請求項１記載の監視用撮像装
置。2. The monitoring image pickup device according to claim 1, wherein the acoustic element mounting portion of the hermetically sealed container is thinner than the others. 【請求項３】 撮像部を密閉容器内に収納してなる監視
用撮像装置において、上記密閉容器に開口を設け、この
開口を塞ぐ薄板の内側に発音及び集音機能を有する平板
振動形の音響素子を密着して取付けたことを特徴とする
監視用撮像装置。3. A monitoring image pickup device in which an image pickup section is housed in a closed container, wherein an opening is provided in the closed container, and a flat plate vibration type sound having a sound generating and sound collecting function inside a thin plate closing the opening. An imaging device for monitoring, characterized in that elements are attached in close contact with each other. 【請求項４】 密閉容器の音響素子取付け部の外側をホ
ーン形状としたことを特徴とする請求項１〜３の何れか
に記載の監視用撮像装置。4. The monitoring image pickup device according to claim 1, wherein the outer side of the acoustic element mounting portion of the closed container has a horn shape. 【請求項５】 密閉容器の少なくとも上側を覆う保護用
フードに一体にホーン形状部を設け、このホーン形状部
を密閉容器の音響素子取付け部の外側に当接するよう上
記保護用フードを上記密閉容器に取付けたことを特徴と
する請求項１〜３の何れかに記載の監視用撮像装置。5. A protective hood that covers at least the upper side of the hermetically sealed container is integrally provided with a horn-shaped portion, and the protective hood is provided so that the horn-shaped portion abuts the outside of the acoustic element mounting portion of the hermetically sealed container. The monitoring image pickup device according to claim 1, wherein the monitoring image pickup device is attached to the monitor image pickup device.