JP2000004387A - Housing for television camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the ice growing from washer nozzles from entering into the view angle of a television camera at the time of freezing in a winter by arranging the washer nozzles in the obliquely upper position or obliquely lower position of protection glass in the washer nozzles jetting washer liquid to the protection glass of a housing for television camera. SOLUTION: Washer nozzles 28 and 30 fitted to a housing for television camera 10 are arranged in the obliquely upper position or obliquely lower position of protective glass 24. The ice growing from the washer nozzles 28 and 30 is unable to tolerate its own weight, when the ice grows prescribed quantity, and therefore the ice breaks from the washer nozzles 28 and 30 at the time of freezing in a winter. Thus, the ice does not enter into the view angle of a television camera.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a housing for a television camera, and more particularly to a housing for a television camera in which the television camera is stored and used outdoors.

[0002]

2. Description of the Related Art A television camera housing for accommodating a television camera is provided with a protective glass at a position corresponding to a front surface of a photographing lens of the television camera. Some of the TV camera housings are provided with a washer nozzle, and the protective glass is washed by spraying a washer liquid from the washer nozzle toward the protective glass.

[0003]

However, since the washer nozzle of the conventional television camera housing is provided above or below the protective glass, the ice that has grown from the washer nozzle during freezing in the winter is reduced by There is a drawback that it extends vertically and penetrates the angle of view of the television camera.

The present invention has been made in view of such circumstances, and it is possible to suppress the growth of ice from a nozzle during winter freezing and to prevent the ice from entering the angle of view of a television camera. It is an object to provide a camera housing.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a housing body for housing a television camera, and a housing provided in the housing body and located at a position corresponding to a front surface of a photographing lens of the television camera. In a television camera housing having an attached protective glass and a nozzle for spraying a cleaning liquid toward the protective glass, the nozzle is disposed at an obliquely upper position or an obliquely lower position of the protective glass. .

According to the present invention, since the nozzle is disposed at an obliquely upper position or an obliquely lower position of the protective glass, ice that grows from the nozzle during winter freezing cannot withstand its own weight when it grows by a predetermined amount. Break. This allows
ADVANTAGE OF THE INVENTION Since this invention can suppress ice growth, it can prevent that ice infiltrates the angle of view of a television camera.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a housing for a television camera according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a front view showing a state in which a television camera housing 10 according to an embodiment of the present invention is attached to a camera platform device 12.

A pan head device 12 shown in FIG. 1 is a remote control pan head for performing pan / tilt operation of a camera by remote control operation, and has a pan axis 14 and a tilt axis 16, and a driving unit for driving these axes 14, 16. Is built in the casing 18 of the camera platform device 12. An L-shaped support 20 is attached to the tilt shaft 16 of the camera platform device 12. The TV camera housing 10 is mounted on the support base 20 via a mounting adapter (not shown).

The TV camera housing 10 has a metal housing main body 22 for housing the TV camera.
4. Wiper device 26 and washer nozzles 28, 3
0 is provided. The protective glass 24 is formed in a rectangular shape and is attached to an opening formed on the front surface of the housing body 22. Also, the protective glass 24
Is attached to the television camera housed in the housing body 22 at a position corresponding to the front surface of the photographing lens 32 indicated by a two-dot chain line in FIG.

Around the inner surface of the protective glass 24,
A plate-shaped heater 34 serving as a defroster device is attached, and the heater 34 is connected to a power source (not shown) via an electrode 36. Therefore, when power is supplied from the power source to the heater 34, the protection glass 24 is heated by the heater 34. Thereby, frost and fogging attached to the surface of the protective glass 24 are removed.

A heat insulating material 38 is attached to the outer peripheral edge of the protective glass 24. A concave portion 39 is formed in the inner peripheral portion of the heat insulating material 38, and the heat insulating material 38 is attached to the protective glass 24 by fitting the outer peripheral portion of the protective glass 24 into the concave portion 39. The heat insulating material 38 is fixed to the housing main body 22 by screws 40, whereby the protective glass 24 is attached to the housing main body 22 via the heat insulating material 38. Thereby, the protective glass 24 is disposed at a position protruding forward by a predetermined amount from the front surface 22A of the housing body 22.

The heat insulating material 38 is made of a material having a lower thermal conductivity than the protective glass 24, such as chloroprene rubber (CR), so that the heat insulating property of the protective glass 24 by the heater 34 is enhanced. As shown in FIG. 1, the wiper device 26 is provided on a side of the protective glass 24. The wiper device 26 has a long wiper blade 42, and a central portion of the wiper blade 42 is connected to a link 44 constituting a parallel link mechanism.

The upper right end of the link 44 in FIG. 1 is rotatably connected via a pin 48 to a lower end of a drive arm 46 constituting the parallel link mechanism. Link 4
4 is rotatably connected via a pin 52 to a lower end of a driven arm 50 constituting the parallel link mechanism. The driving arm 46 and the driven arm 50
And are arranged in parallel. Then, the drive arm 46
The upper end is connected to an output shaft 54 of a motor (not shown), and the driven arm 50 is rotatably supported at its upper end by a motor housing 58 via a pin 56. The motor is built in the motor housing 58.

When the motor is driven to swing the drive arm 46, the wiper blade 42 reciprocates on the front surface of the protective glass 24. The wiper blade 42 is urged toward the protective glass 24 by an urging member (not shown). Thereby, the wiper blade 4
2 reciprocates while being pressed by the protective glass 24, so that water droplets, dust, and the like adhering to the front surface of the protective glass 24 are reliably wiped by the wiper blade 42.

A heater 58 shown in FIG. 3 is embedded in the wiper blade 42 along the wiper blade 42. The heater 58 is moved from the frame 43 of the wiper blade 42 to the drive arm 46 or the driven arm 5.
The power supply is connected to a power supply (not shown) through the power supply 0, and is heated to a predetermined temperature by supplying power from the power supply.
Thereby, the wiper blade 42 is attached to the protective glass 2.
4 can be removed while melting frost and ice.

As shown in FIG. 1, washers 28 and 30 are attached to the front surface 22A of the housing body 22. The washer nozzle 28 is attached obliquely upward to the right in FIG. 1 with respect to the protective glass 24, and its washer liquid injection ports 29, 29 are formed toward the protective glass 24. The washer nozzle 30 is attached to the protective glass 24 at an obliquely lower right in FIG. 1, and the washer liquid injection ports 31, 31 are formed toward the protective glass 24.

As described above, the washer nozzles 28, 30
Is provided at an inclined position with respect to the protective glass 24, the ice that grows from the washer liquid injection ports 29 and 31 during freezing,
Grows diagonally. As a result, when the ice has grown by a predetermined amount, it cannot withstand its own weight and breaks from the washer liquid injection ports 29 and 31. From this viewpoint, the washer nozzles 28 and 30 are provided with protective glass 24 so that the grown ice breaks before entering the angle of view of the television camera.
It is attached at a position separated by a predetermined distance from the camera. This can prevent the ice from entering the angle of view of the television camera.

In the present embodiment, the washer nozzles 28 and 30 are disposed at an obliquely upper position or an obliquely lower position with respect to the protective glass 24, but the present invention is not limited to this position. That is, the washer nozzles 28, 3
0 may be arranged at a position excluding the position where the grown ice enters the angle of view 62 (see FIG. 4) of the television camera (the upper area 64 and the lower area 66 in the vertical direction of the angle of view 62). In short, the left and right side areas 68 and 70 of the angle of view 62
The washer nozzles 28 and 30 may be arranged at the same time. However, in consideration of the washability of the protective glass 24 by the washer nozzles 28 and 30, the diagonally upper areas 72 and 74 or the diagonally lower areas 76 and 7 are more preferable than disposing the washer nozzles 28 and 30 in the side areas 68 and 70.
It is preferable to dispose the washer nozzles 28 and 30 at 8.

[0019]

As described above, according to the housing for a television camera of the present invention, by disposing the nozzle at an obliquely upper position or an obliquely lower position of the protective glass,
Since the growth of ice during freezing in winter is suppressed, it is possible to prevent the ice from entering the angle of view of the television camera.

[Brief description of the drawings]

FIG. 1 is a front view in which a television camera housing according to an embodiment of the present invention is installed in a camera platform device.

FIG. 2 is a sectional view of a protective glass of the television camera housing shown in FIG. 1;

FIG. 3 is a sectional view of a wiper blade of the television camera housing shown in FIG. 1;

FIG. 4 is an explanatory view showing an arrangement position of a washer nozzle with respect to a protective glass.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Housing for television cameras 12 ... Pan head device 22 ... Housing body 24 ... Protective glass 26 ... Wiper device 28, 30 ... Washer nozzle 34 ... Heater 38 ... Insulation material 42 ... Wiper blade

Claims (1)

[Claims] 1. A housing body for accommodating a television camera, a protective glass provided on the housing body and attached to a position corresponding to a front surface of a photographing lens of the television camera, and a cleaning liquid is sprayed toward the protective glass. A television camera housing, comprising: a nozzle that is disposed diagonally above or below the protective glass.