JP7134102B2 - Surveillance camera equipment - Google Patents

Description

The present invention relates to a surveillance camera device having a protective member that covers an imaging lens.

2. Description of the Related Art Conventionally, in surveillance camera devices, in order to protect an imaging lens of a camera from rain, dust, or the like, a transparent protective member is provided to cover the imaging lens. A dome cover, a windshield, or the like can be used as the protective member. On the other hand, when dirt such as dust, smoke, or rain water adheres to the protective member, it becomes difficult to see the image captured by the camera.

Therefore, in a conventional surveillance camera device, a mechanism having an air pump or a fan is used to inject air against the protective member (see Patent Documents 1 and 2, for example). As a result, the monitoring camera device can reduce the adhesion of dirt to the protective member.

JP-A-1998-216666 JP 2011-141414 A

As described above, in the conventional surveillance camera device, a mechanism having an air pump or fan is used to inject air to the protective member. Air pumps and fans, on the other hand, are mechanical parts. Therefore, the conventional surveillance camera device consumes power. In addition, the above-mentioned mechanical parts are usually not operated all the time in order to prevent failures, etc., and the operation must be controlled by the operator.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems, and to provide a monitoring camera device capable of reducing the adhesion of dirt to protective members without using mechanical parts.

A monitoring camera device according to the present invention has an antifouling coating on the surface, a transparent protective member that covers an imaging lens of the camera, and an opening on the front surface for exposing the protective member to the outside, A housing cover that covers the entire camera, and a duct that is provided outside the field of view of the camera and has an air outlet facing a protective member, wherein the duct has an air inlet provided on a side surface of the housing cover, and the air outlet is provided on a side surface of the housing cover. A port is provided on the front side of the housing cover, and the area of the outlet is configured to be smaller than the area of the suction port.

According to the present invention, since it is configured as described above, it is possible to reduce adhesion of dirt to the protective member without using mechanical parts.

1A to 1C are diagrams showing a configuration example of a surveillance camera device according to Embodiment 1, where FIG. 1A is a front view, FIG. 1B is a perspective view, and FIG. 1C is a cross-sectional top view. 2A to 2C are diagrams showing another configuration example of the surveillance camera device according to Embodiment 1, where FIG. 2A is a front view, FIG. 2B is a perspective view, and FIG. 2C is a cross-sectional top view. .

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Embodiment 1.
FIG. 1 is a diagram showing a configuration example of a monitoring camera device according to Embodiment 1. As shown in FIG.
The surveillance camera device includes a dome cover 1, a housing cover 2 and a duct 3, as shown in FIG. This monitoring camera device is installed in an environment where air flows and dirt such as dust, smoke, or rain water easily adheres. Examples of the environment include outdoors such as valleys, tunnels, and underpasses.

The dome cover 1 is made of a hemispherical transparent member and is a cover that covers the imaging lens of the camera. Note that the camera has an angle of view of, for example, 180 degrees. Further, the dome cover 1 has an antifouling coating applied to its surface. As the antifouling coating, a coating having durability is desirable, and examples include a hydrophilic coating, a water-repellent coating, or a coating having both hydrophilic and water-repellent properties.

The housing cover 2 is a cover that covers the entire camera. This housing cover 2 is arranged with a certain gap with respect to the camera in order to reduce heat rise of the camera due to direct sunlight when the surveillance camera device is installed outdoors. Further, the housing cover 2 has an opening 21 on its front surface for exposing the dome cover 1 to the outside.

A duct 3 is provided outside the field of view of the camera and injects air to the dome cover 1 . It should be noted that the field of view of the camera provided in the monitoring camera device can be grasped at the design stage of the monitoring camera device. In FIG. 1 , the duct 3 is attached to the left side of the dome cover 1 . The duct 3 has a body portion 31, a suction port 32 and a blowout port 33, as shown in FIG.

The body portion 31 is a tube provided in the gap between the camera and the housing cover 2 . Further, the body portion 31 has an inclined surface extending from the suction port 32 to the blowout port 33 as a surface on the lower side in the direction of gravity.
The suction port 32 is provided at one end of the body portion 31 .
The blowout port 33 is provided at the other end of the body portion 31 and faces the dome cover 1 . The area of the blowout port 33 is configured to be smaller than the area of the suction port 32 . In FIG. 1 , the outlet 33 is located on the upper left side of the dome cover 1 .

Next, the action and effect of the monitoring camera device according to the first embodiment will be described.
In the monitoring camera device according to Embodiment 1, the duct 3 is provided in which the area of the outlet 33 is smaller than the area of the inlet 32 . Therefore, the air that has flowed into the suction port 32 of the duct 3 increases its speed at the blowout port 33 due to the air pressure difference from the suction port 32 , and is jetted to the dome cover 1 . As a result, the monitoring camera device according to the first embodiment can inject air to the dome cover 1 without using a mechanical component such as an air pump or fan.

On the other hand, the airflow generated by duct 3 is weaker than the airflow generated by air pumps or fans.
Therefore, in the surveillance camera device according to the first embodiment, the surface of the dome cover 1 is coated with an antifouling coating. As a result, the dome cover 1 is less susceptible to dirt such as dust, soot, rainwater, etc. even in the airflow generated by the duct 3 .

Further, the duct 3 is provided with an inclined surface directed from the intake port 32 to the outlet port 33 as a surface on the lower side in the direction of gravity on the main body portion 31 . As a result, the duct 3 prevents rainwater from flowing toward the blowout port 33 or accumulation of dust, soot, or the like on the blowout port 33 side, so that it can be discharged from the suction port 32 . Therefore, the monitoring camera device according to Embodiment 1 can reduce the influence of dust, smoke, rainwater, etc. from the duct 3 on the dome cover 1 .

FIG. 1 shows the case where the duct 3 is attached to the left side of the dome cover 1. As shown in FIG. On the other hand, the duct 3 may be attached to the right side of the dome cover 1 as shown in FIG. The monitoring camera device shown in FIG. 2 also has the same effect as the monitoring camera device shown in FIG.
The user uses the monitoring camera device shown in FIG. 1 or the monitoring camera device shown in FIG. 2 depending on the direction of the wind at the location where the monitoring camera device is installed. As a result, adhesion of dirt to the dome cover 1 is further reduced.

1 and 2, the outlet 33 of the duct 3 is located above the dome cover 1. As shown in FIG. However, not limited to this, the position of the outlet 33 in the height direction can be arbitrarily designed.

1 and 2 show the case where the dome cover 1 is used as the protective member. However, the protective member is not limited to this, and a windshield, for example, may be used as the protective member, and the same effect as described above can be obtained.

As described above, according to the first embodiment, the monitoring camera device includes a transparent protective member having an antifouling coating on the surface and covering the imaging lens of the camera, and a protective member provided outside the field of view of the camera. , and a duct 3 having a blowout port 33 opposed to the protective member, and the duct 3 is configured such that the area of the blowout port 33 is smaller than the area of the suction port 32. - 特許庁As a result, the monitoring camera device according to the first embodiment can reduce the adhesion of dirt to the protective member without using mechanical parts. In other words, the monitoring camera device according to the first embodiment can reduce the adhesion of dirt to the protective member without consuming power and without being controlled by the operator. Moreover, since the monitoring camera device according to the first embodiment does not use mechanical parts unlike the conventional configuration, it is possible to suppress part failures and reduce part costs.

It should be noted that, within the scope of the present invention, any component of the embodiment can be modified or any component of the embodiment can be omitted.

1 dome cover, 2 housing cover, 3 duct, 21 opening, 31 main body, 32 suction port, 33 outlet.

Claims (2)

a transparent protective member having an antifouling coating on the surface and covering the imaging lens of the camera;
a housing cover having an opening on the front surface for exposing the protective member to the outside and covering the entire camera;
a duct provided outside the field of view of the camera and having an outlet facing the protective member;
The duct has a suction port provided on a side surface of the housing cover, a discharge port provided on a front side of the housing cover, and an area of the discharge port smaller than an area of the suction port. A surveillance camera device characterized by: 2. The surveillance camera device according to claim 1, wherein the duct has, as a surface on the lower side in the direction of gravity, an inclined surface extending from the inlet to the outlet.

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