JPH06167670A - Air cooling type dust-proof camera housing - Google Patents

Abstract

PURPOSE:To provide an air cooling type dust-proof housing which prevents dust and dirt from sticking during the continuous use of a camera device and reduces the influence of external light made incident on a camera lens. CONSTITUTION:The air cooling type dust protection camera housing 10 consists of a housing main body 20 which has a 1st opening part 21 and is also provided with an air blowing means at an air blowing opening 23' formed in its wall surface, a partition member 30 which separates the internal surface of this housing main body 20 into a front space part 31 and a rear space part 32 and also has a 2nd opening part 33 smaller in opening area than the 1st opening part 21, a camera device 40 which is arranged in the rear space part separated by the partition member 30, etc. The camera device 40 is fixed to a camera fixing base 42 provided in the rear space part 32 opposite the 2nd opening part 33 of the partition member 30. The air from the air blowing means is put in convection from the rear space part 32 in the order of the 2nd opening part 33, front space part 32, and 1st opening part 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air-cooling type dustproof camera housing for air-cooling a camera device housed in a housing while preventing dust and the like from adhering to the camera device and camera lens.

[0002]

2. Description of the Related Art In recent years, camera devices such as video cameras have been reduced in size and improved in image quality, and have been used for various purposes. For example, a wide variety of video cameras are used not only for home use but also for business use, such as those used for monitoring purposes at banks and factories, and those used for recording and observation purposes at laboratories and production sites. Is used for. Further, the installation location of the camera device used for the purpose may be a high place or a narrow place that is difficult for a person to approach, or a place that may adversely affect the human body, so maintenance of the camera device once installed is unnecessary. I wanted to be there.

Therefore, as shown in FIG. 5, the camera device 1
Is fixed to a camera fixing base 3 provided inside the housing 2, and a transparent glass 5 is arranged in an opening portion of the housing 2 on the front side of the camera lens 4, while a transparent glass in which the transparent glass 5 is arranged. An air outlet portion 6a is provided in the mounting portion 6, and an air hose joint 7 serving as an air blowing port is provided in the housing 2 located at the rear of the camera device.
The air hose joint 7 is connected to an air generating means (not shown) via an air hose 7a.

The inside of the housing constructed as described above is blown with air from the air hose joint 7 and is discharged from the air outlet 6a provided in the transparent glass mounting portion 6 to form an arrow in the figure. An air flow as shown occurs. As described above, by generating an air flow inside the housing 2, the camera device 1
While suppressing the rise of the internal temperature due to long-term use, the dust and dirt inside the housing are discharged to the outside and the dust and dirt attached to the front surface of the transparent glass 5 are blown away.

[0005]

However, by continuously using the camera device, dust or dirt adheres to the outer surface and the inner surface of the transparent glass to fog the transparent glass to obtain a desired image. Since it becomes impossible to remove dust and dirt adhering to the transparent glass, it is difficult to remove dust and dirt adhering to the transparent glass depending on the installation location.

Further, since the camera lens is disposed close to the transparent glass, external light or the like is incident on the camera lens, which causes an image that is difficult to see.

The present invention eliminates the above problems, and provides an air-cooled dustproof camera housing which prevents dust and dirt from adhering to the camera device during continuous use and reduces the influence of external light incident on the camera lens. The purpose is to do.

[0008]

SUMMARY OF THE INVENTION An air-cooled dustproof camera housing according to the present invention comprises a housing body having a first opening, a space inside the housing body and a rear side space and a front side where a camera device can be arranged. A partition member having a second opening portion having an opening area smaller than that of the first opening portion divided into a side space portion; and a camera device having a lens surface directed to the second opening portion provided in the partition member. A blower opening is provided on the wall surface of the housing body for sending air to the rear space portion, and a blower means for sending air from the blower opening to the rear space portion.

[0009]

According to the present invention, the air supplied from the air blowing means to the rear space is discharged from the second opening provided in the partition member to discharge the heat generated from the camera device to cool it. Preventing dust and dirt from entering through the second opening of the partition member. Further, the camera device is provided in the rear space portion and the camera lens is opposed to the second opening provided in the partition member to reduce the entry of external light into the camera lens.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 relate to an embodiment of the present invention, and FIG. 1 is a sectional view showing a schematic configuration of an air-cooled dustproof camera housing,
FIG. 2 is a perspective view showing a schematic configuration of the inside of the air-cooled dustproof camera housing.

As shown in FIGS. 1 and 2, the air-cooling type dust-proof camera housing 10 has a first opening portion 21 on the front end side, and air as a blowing means to a blower opening 23 'provided on, for example, a rear end side wall surface. The housing body 20 in which the hose joint 22 is arranged, and the inner surface of the housing body 20 are separated into a front space portion 31 and a rear space portion 32, and the rear space portion 32 and the front space portion 31 are communicated with each other. The partition member 30 has a second opening 33 having an opening area smaller than that of the first opening 21, and a camera device 40 and the like arranged in the rear space 32 separated by the partition member 30. Has been done.

The camera device 40 includes a camera lens 41.
Is fixed to a camera fixing base 42 provided in the rear space 32 so as to face the second opening 33 provided in the partition member 30.

A second opening 33 having a minimum diameter that does not affect the angle of view of the camera lens 41 is provided in the central portion of the partition member 30. The air hose joint 22 is connected to an air generating means (not shown) through an air hose 23.

The operation of the air-cooled dustproof camera housing 10 constructed as described above will be described. As shown in FIG. 1, dehumidified high-pressure air having a low temperature is sent to the rear space portion 32 from an air hose joint 22 provided on the wall surface of the rear portion of the housing body 20, for example. The high-pressure air sent into the space 32 on the rear side of the housing body 20 is convected as indicated by an arrow in the figure, and the camera device 30.
Second heat generated from the center of the partition member 30
Is discharged from the opening 33 to the outside of the housing main body 20 through the front space 31, the first opening.

As described above, the high pressure air sent into the rear side space portion 32 of the housing body 20 is supplied to the second opening portion 3.
3, by convection so as to be discharged to the outside of the housing main body 20 via the front side space 32 and the first opening 21, the heat generated in the camera device 40 is of course generated in the rear side space. Since it is also discharged to the outside of the housing body 20, dust and dirt are not attached to the camera lens 41, and the camera device 40 can be cooled reliably.

Further, the high-pressure air sent from the air hose joint 22 passes from the rear space 32 through the second opening 33 having a small opening area, so that the high-pressure air is narrowed down. Thus, the flow velocity of air is increased to flow into the front space portion 32. Therefore, it is possible to reliably prevent dust and dirt from entering from the front space portion 31 to the rear space portion 32, so that periodical work for removing dust is not required.

Further, the camera device 40 is arranged behind the housing body 20, and the second opening 33 having an opening area smaller than that of the first opening 21 is provided on the front surface of the camera lens 41. Camera lens 41
Since it is possible to reduce the entry of external light into the screen, it is possible to provide a screen that is easy to see.

FIG. 3 is a sectional view showing a schematic structure of an air-cooled dustproof camera housing according to a first modification of the above embodiment. In this embodiment, the second opening 33 provided in the partition member 30 disposed inside the housing body 20 is provided in the cylindrical portion 3.
It is formed as 4. The other structure is the same as that of the above embodiment.

As described above, the second opening 33 is formed in the cylindrical portion 34.
As a result, the air discharged from the rear space portion 32 to the front space portion 31 passes through the long cylinder portion 34 at an increased flow rate, so that dust from the front space portion 31 is generated by the chimney effect. It is possible to more effectively prevent dust and dirt from entering.

Further, since the cylindrical portion 34 is provided on the partition member 30, it is possible to further reduce the entrance of external light into the camera lens 41. Other functions and effects are similar to those of the above-mentioned embodiment.

FIG. 4 is a sectional view showing a schematic structure of an air-cooled dustproof camera housing according to a second modification of the above embodiment. In this embodiment, the second opening 33 provided in the partition member 30 arranged inside the housing body 20 is formed as a trumpet-shaped tubular portion 35. The other structure is the same as that of the above embodiment. By forming the second opening portion 33 as the trumpet-shaped tubular portion 35 as described above, the tubular length of the trumpet-shaped tubular portion 35 can be set longer than that of the tubular portion 34 of the first modification. Since it can be done, the rear space 32
By increasing the chimney effect of the air discharged from the front side space 31 to the front side space 31, it is possible to more effectively prevent dust and dirt from entering from the front side space 31. Other functions and effects are similar to those of the above-mentioned embodiment.

[0022]

As described above, according to the present invention, an air-cooled dustproof camera housing is provided which prevents dust and dirt from adhering to the camera device due to continuous use and reduces the influence of external light incident on the camera lens. can do.

[Brief description of drawings]

1 and 2 relate to an embodiment of the present invention.
Is a cross-sectional view showing the schematic configuration of the air-cooled dustproof camera housing.

FIG. 2 is a perspective view showing a schematic configuration inside the air-cooled dustproof camera housing.

FIG. 3 is a sectional view showing a schematic configuration of an air-cooled dustproof camera housing according to a first modification of the embodiment.

FIG. 4 is a sectional view showing a schematic configuration of an air-cooled dustproof camera housing according to a second modification of the embodiment.

FIG. 5 is a sectional view showing a schematic configuration of an air-cooled dustproof camera housing according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Air-cooling type dust-proof camera housing 20 ... Housing main body 21 ... 1st opening part 22 ... Air hose joint (blowing means) 30 ... Partition member 33 ... Second opening part 40 ... Camera device

Claims (1)

[Claims] 1. A housing main body having a first opening, and a first opening that divides a space in the housing main body into a rear space and a front space in which a camera device can be arranged. A partition member having a second opening with a small opening area, a camera device with a lens surface facing the second opening provided in the partition member, and the rear side space provided on the wall surface of the housing body. An air-cooling type dust-proof camera housing, comprising: a blower port for feeding air to the air blower; and a blower means for blowing air to the space on the rear side from the blower port.