JPH0526858Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a surveillance camera suitable for monitoring a wide range, such as monitoring a boat race course, a racecourse, a stadium, a gathering place, etc.

[Summary of the idea]

The present invention is a surveillance camera that is suitable for monitoring a wide range of areas such as stadiums, etc. It is made of a transparent material and is coated with aluminum evaporation on the entire surface, leaving a predetermined area inside the aluminum evaporation layer. A housing on which a light-shielding paint is applied, a photographing section disposed inside the housing and rotatable in a vertical direction that faces a predetermined area where the light-shielding paint is not applied, and the housing and photographing section are integrated. By providing a swivel base that supports the housing and the imaging unit in a horizontal direction, the surface of the housing becomes mirror-like due to the aluminum vapor deposition part and the light-shielding paint, and the interior of the housing is exposed to the outside. It is possible to take good pictures of the exterior of the housing through a specified area where no light-shielding paint is applied, and people around you are not aware that they are being filmed. It is designed so that it can be monitored.

[Conventional technology]

Traditionally, surveillance video cameras have been used to actively show that they are monitoring (recording);
There were times when they concealed the fact that they were being monitored. In order to hide the fact that this surveillance was being carried out, video cameras with prism lenses, pinhole lenses, magic mirrors, etc. were used. These video cameras have lenses that are difficult to detect from the outside, making it possible to hide the fact that they are being monitored.
A certain effect can be obtained for crime prevention and the like.

[The problem that the idea aims to solve]

However, in the case of such video cameras, it is difficult to rotate the video camera, a zoom lens cannot be attached as a lens, and the angle of view, shooting position, etc. cannot be changed. Ta.

In order to solve this problem, for example, aluminum was vapor-deposited on the surface of a hemispherical dome to make it mirror-like so that the inside could not be seen, and a rotatable video camera was placed inside the dome. things were being developed.

However, if aluminum was deposited to such an extent that the video camera housed inside the dome could not be seen from the outside, the light transmittance would drop to less than 50%, resulting in a significant drop in the video camera's shooting sensitivity. . Furthermore, there is a problem in that the light entering the inside of the dome from the rear of the video camera is emitted randomly within the dome, making the photographed screen very difficult to see.

In view of the above, it is an object of the present invention to provide a surveillance camera that allows good surveillance without people around being aware that they are being photographed.

[Means to solve the problem]

As shown in FIG. 1, the surveillance camera of the present invention is made of a transparent material and is coated with aluminum evaporation over the entire surface, and a light-shielding paint is applied to the inside of the aluminum evaporation layer, leaving a predetermined area 4b. A housing 4, a vertically rotatable photographing section 5 arranged inside the housing 4 and facing a predetermined area 4b to which no light shielding paint is applied, and a housing 4 and photographing section 5 are integrally supported. The housing 4 and the photographing section 5 are provided with a swivel base which can be rotated in the horizontal direction.

[Effect]

According to the surveillance camera of the present invention, the housing 4
The surface is made mirror-like by being coated with aluminum evaporation, and a light-shielding paint is applied leaving a predetermined area 4b, so it is not possible to look into the inside of the housing 4 from the outside outside of the predetermined area 4b. Can not. The photographing unit 5 can clearly photograph the outside of the housing 4 through the predetermined range 4b where the light-shielding paint is not applied, and the other parts of the housing 4 are coated with the light-shielding paint. Therefore, unnecessary light does not enter the housing 4, and even the predetermined area 4b where this light-shielding paint is not applied becomes completely mirror-like, making it impossible to look into the housing 4 from the outside, and the photographing unit 5 This allows for good monitoring (photography) in a completely hidden state.

〔Example〕

Hereinafter, one embodiment of the surveillance camera of the present invention will be described with reference to the accompanying drawings.

The surveillance camera of this example is one that is hung from the ceiling of the audience seats in a boat racecourse, stadium, etc.
As shown in the figure, a hanging column 1 whose upper end is fixed to the ceiling is provided, and a swivel table 2 is attached to the lower end of this column 1.
Install. This swivel base 2 has a fixed part 2a that is fixed to the support column 1 and has a built-in motor (not shown), and a swiveling part 2b that swivels in the horizontal direction by the motor in this fixed part 2a. The dome support member 3 is screwed to the lower end of the dome support member 3. This turning section 2
The rotation of b is controlled by a remote control device (not shown). Then, a hemispherical dome 4 is fixed to the lower part of this dome support member 3.

This dome 4 is made of transparent acrylic, and the inner surface is subjected to aluminum vapor deposition to make the surface of this dome 4 mirror-like. In this example, this aluminum vapor deposition reduces the light transmittance of this dome 4 to 70%. Then, a black paint having a light-shielding property is applied from above the aluminum vapor-deposited inside of the dome 4. At this time, a belt-like part with a predetermined width is provided from the substantially central part (lower end part) to the peripheral part of the hemispherical dome 4 to which no black paint is applied. By doing so, this dome 4 has a light shielding part 4a where light is completely blocked by the aluminum vapor deposition layer and the black paint layer inside the aluminum vapor deposited layer, as shown in FIGS. 1, 2, and 3. , and a light-transmitting part 4b having a transmittance of 70% with only an aluminum vapor-deposited layer and no black paint applied. However, in appearance from the outside, both the light-shielding part 4a and the light-transmitting part 4b are mirror-like, and the light-transmitting part 4
It is not possible to look into the inside of this dome 4 through b. That is, when the dome is vapor-deposited with aluminum as in this example, no light is emitted from the inside of the dome to the outside unless light enters the inside of the dome. Therefore, the dome 4 is protected by the light shielding part 4a.
Most of the light is blocked from entering the inside of the dome, and very little light is emitted to the outside through the light-transmitting portion 4b, and the light-transmitting portion 4b also appears to have a mirror surface similar to the light-shielding portion 4a.

A video camera section 5 is built inside the dome 4. That is, as shown in Figure 1,
A camera support part 3a is provided inside the dome support member 3, and a video camera part 5 is suspended from this camera support part 3a. At this time, the video camera section 5 is supported by the camera support section 3a via the rotation shaft 3b, and is driven by a motor (not shown) built in the camera support section 3a as shown by arrow t in FIG. ,
The video camera section 5 is configured to be tiltable up and down.
This tilting movement is controlled by a remote control device.

The video camera section 5 has an imaging lens 5a made of a zoom lens attached to its tip, and the movement range of the imaging lens 5a due to the above-mentioned tilting is set to a position facing the above-mentioned transparent part 4b of the dome 4. Next, the mounting positions of the video camera section 5 and the dome 4 are determined. Further, the zoom magnification of the imaging lens 5a of the video camera section 5 is controlled by a remote control device. The power supply unit 6 of this video camera section 5 is fixed inside the dome 4 beside the video camera section 5, as shown in FIGS. 2 and 3.

The video signal captured and output by the video camera section 5 is transmitted to a monitor television receiver (not shown) provided near the remote control device described above.
The monitor television receiver receives the video signal.

Since the surveillance camera of this example is configured as described above, it is possible to monitor images of the location where the surveillance camera is installed in any direction and angle of view using a monitor television receiver. That is, by operating the remote control device, it is possible to freely rotate the dome 4 housing the video camera section 5 in the horizontal direction by the swivel base 2 and tilt the video camera section 5 by the camera support section 3a. , the imaging lens 5a can be directed in any direction. Since the video camera section 5 and the dome 4 rotate in the horizontal direction as one, the light-transmitting section 4b is always located in the dome 4 immediately in front of the imaging lens 5a, and the dome 4 has a transparent aluminum layer with a transmittance of 70%. Light from the outside passes through this transparent section 4.
The light enters the imaging lens 5a in a state where the light is attenuated by 30% at b. Therefore, the video camera section 5 can photograph the outside of the dome 4. Then, while viewing the image received on the monitor television receiver, the rotational position and tilting position of the video camera unit 5 and the imaging lens 5 are controlled by a remote control device.
By specifying the zoom magnification of a, you can move in any direction,
Monitoring can be performed using images of the angle of view.

In this example, by applying black paint with light-shielding properties to the inside of the dome 4 other than the position facing the imaging lens 5a, the surface of the dome 4 appears to be a perfect mirror surface from any position, and from the outside You can't look inside. Therefore, the movement of the video camera section 5 is completely invisible from the outside, and the people around it are completely unaware of which position is being monitored, making it highly effective for monitoring purposes such as crime prevention.

Further, since most of the dome 4 is a light-shielding portion 4a, less light enters the dome 4, and the surface of the dome 4 appears to be a perfect mirror surface despite the light-transmitting portion 4b. Therefore, the transmittance of the light-transmitting portion 4b can be increased to about 70%, and the amount of light incident on the imaging lens 5a is large, allowing for high-sensitivity and good photographing. Further, the light shielding portion 4a prevents unnecessary light rays from entering the dome 4, thereby eliminating unnecessary light rays from entering the imaging lens 5a.

Furthermore, in this example, since the video camera section 5 and the dome 4 are made to rotate together, the power supply unit 6 of the video camera section 5 can be moved away from the video camera section 5 to create an empty space inside the dome 4. can be placed in the video camera section 5.
The size of the dome itself and the diameter of the dome 4 can be reduced.

Note that the present invention is not limited to the above-described embodiments, and it goes without saying that various other configurations may be adopted without departing from the gist of the present invention.

[Effect of idea]

According to the surveillance camera of the present invention, it is possible to photograph the exterior of the housing with good sensitivity while the interior of the housing is completely hidden, and those around you are completely unaware that they are being photographed. There are benefits to good monitoring without having to worry.

[Brief explanation of the drawing]

Fig. 1 is a side view showing one embodiment of the surveillance camera of the present invention, Fig. 2 is a front view seen from the direction of arrow A in Fig. 1, and Fig. 3 is a view from the direction of arrow B in Fig. 1. It is a bottom view. 2 is a rotating base, 4 is a dome, 4a is a light shielding part, 4b
5 is a light transmitting part, 5 is a video camera part, 5a is an imaging lens, and 6 is a power supply unit.

Claims (1)

[Scope of Claim for Utility Model Registration] A housing made of a transparent material and entirely coated with aluminum vapor deposition, with a light-shielding paint coated on the inside of the aluminum vapor deposition layer except for a predetermined area, and a housing disposed inside the housing. a vertically rotatable photographing section that faces a predetermined area where the light-shielding paint is not applied; and the housing and the photographing section are integrally supported, and the housing and the photographing section are horizontally rotatable. A surveillance camera characterized by being equipped with a movable swivel base.