JPH0568191A - Wiper device - Google Patents

Abstract

PURPOSE:To obtain a television(TV) camera lens wiper device requiring a small setting space and having a large wiping area. CONSTITUTION:A protection glass 16 is rotatably set up on a housing 12, and while rotating the glass 16 by a drive motor 34, an oscillation arm 22 is oscillated by an oscillation motor 38 and water drops or the like stuck on the glass 16 are wiped off by a wiper blade 42 fixed to the arm 22. When the length of the blade 42 is set up so that the tip part 44 of the blade 42 is superposed to the center P of the glass 16 when the arm 22 is oscillated to the position of the center P, the whole surface of the glass 16 can be wiped. Since the length of the arm 22 can be shortened as compared with a rotational arm of a conventional wiper device and the position of the rotational supporting point of the arm 22, i.e., the position of a spindle 40, can be brought close to the glass 16, the wiping area can be expanded even in a small setting space.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiper device, and more particularly to a wiper device for wiping off water droplets and the like adhering to a protective glass of a TV camera lens.

[0002]

2. Description of the Related Art In a television camera used outdoors, if water drops, mud, dust or the like adheres to the protective glass attached to the front surface of the lens, it interferes with photography, and the photographer wipes it off each time. However, when the TV camera is remotely operated, even if the protection glass is dirty, the photographer is operating away from the TV camera, and therefore the protection glass cannot be wiped.

Therefore, in order to solve such a problem, a wiper device 1 shown in FIG. 5 disclosed in Japanese Utility Model Laid-Open No. 3-59776 is proposed. This wiper device 1
Is provided inside the hood 3 attached to the front surface of the television camera housing 2, and the wiper blade 5 is attached to the tip of the arm 4 swingably around the fulcrum 5a. When the drive motor 7 reciprocally swings the arm 4 with the base end portion 6 as a fulcrum of rotation, the wiper blade 5
Moves over the entire surface of the protective glass 8, so that water drops and the like adhering to the protective glass 8 can be easily wiped off. Therefore, by remotely controlling the drive motor 7, the dirt on the protective glass 8 can be wiped off even at a position away from the television camera.

[0004]

However, in the wiper device 1 disclosed in Japanese Utility Model Laid-Open No. 3-59776,
In order to wipe the entire effective area of the protective glass 8, it is necessary to increase the length of the arm 4 and set the rotation fulcrum of the arm 4 as far as possible from the protective glass 8 as shown in FIG. .. For this purpose, the hood 3 must be enlarged to expand the installation space for the wiper device 1, and the television camera housing 2 becomes large.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a wiper device having a large wiping area in a small installation space.

[0006]

In order to achieve the above object, the present invention provides a protective glass which is attached to the front surface of a lens for a television camera provided in a housing and is rotatably provided, and a protective glass. A driving device that rotates, an arm that is disposed adjacent to the protective glass and that is capable of reciprocating and swinging with the base end as a fulcrum of rotation, and water droplets that are attached along the longitudinal direction of the arm and that adhere to the protective glass. It is characterized by comprising a long wiper blade for wiping off.

[0007]

According to the present invention, when water droplets or the like adhere to the protective glass, the drive device is driven to rotate the protective glass and the arm is rotated to remove the water droplets or the like adhered to the protective glass with the wiper blade. Wipe off. Thereby, if the length of the wiper blade is formed to a length in which the tip of the wiper blade overlaps with the center of the protective glass when the arm swings and is positioned at the center of the protective glass, the wiper blade can protect the protective glass. You can wipe the entire surface. Therefore, the length of the arm can be made shorter than that of the conventional wiper device, and the pivot fulcrum of the arm can be brought closer to the protective glass than that of the conventional wiper device, so that the wiping area can be reduced in a small installation space. Can be large.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of a wiper device according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 shows a housing 12 of a television camera to which a wiper device 10 according to the present invention is attached. The wiper device 10 is provided with a protective glass 16 in a hood 14 fixed to the front surface of the housing 12.
Is installed in a position adjacent to. The protective glass 1
6 is provided on the front surface of a television camera lens (not shown) provided in the housing 12, and is rotatably attached to the housing 12.

As shown in FIGS. 1 and 2, the wiper device 10 includes a pair of guide rollers 18, 18 and a driving roller 20.
And a swing arm 22. The guide roller 18 is supported by a shaft 24 supported by the housing 12, and a guide groove 26 is formed in the guide roller 18 as shown in FIG. The guide groove 26 is formed so that the frame 30 of the protective glass 16 is inserted and the guide groove 26 can come into contact with the outer peripheral surface 32 of the frame 30. Thereby, the rotation of the protective glass 16 can be guided.

As shown in FIG. 1, the driving roller 20 is disposed in contact with the outer peripheral surface 32 of the frame 30 so as to transmit the rotational force. The drive roller 20 includes a drive motor 34 provided inside the housing 12 and indicated by a dotted line in the drawing.
The rotation force of the drive motor 34 is transmitted through the rotation shaft 36 so that the protection glass 16 is rotated clockwise and the protective glass 16 is rotated counterclockwise. it can.

The swing arm 22 is provided adjacent to the protective glass 16. The base end portion of the swing arm 22 is fixed to the shaft 40 of the swing motor 38 shown by the dotted line in FIG. 2, and the turning force from the swing motor 38 is transmitted through the shaft 40 to the position A in the figure. It is arranged so that it can swing back and forth from the position to the position B. Further, a long wiper blade 42 shown by a dotted line in the drawing is attached to the swing arm 22 along the longitudinal direction of the swing arm 22. This wiper blade 4
2, the swing arm 22 swings so that water droplets and the like attached to the protective glass 16 can be wiped off. Furthermore, the length of the wiper blade 42 is formed longer than the radius of the protective glass 16, and when the swing arm 22 rotates and overlaps with the center P of the protective glass, that is, the swing arm 22 is C. The tip portion 44 of the wiper blade 42 is formed to have a length overlapping with the center P when it is in the position.

Next, the wiper device 1 configured as described above.
The action of 0 will be described with reference to FIGS. 4 to 13. 4 to 13 show an embodiment in which the swing arm 22 rotates 5 ° every time the protective glass 16 rotates 40 °, and the hatched portion in the drawings shows the protective glass by the wiper blade 42. 16 wiped portions 46 are shown.

If water drops or the like adhere to the protective glass 16 during use of the television camera, the drive motor 34 is driven to rotate the drive roller 20 to rotate the protective glass 16. At the same time, the swing motor 38 is driven to swing the swing arm 22. The drive motor 34 and the swing motor 3 are shown in FIG.
After activating 8, the protective glass 16 is rotated 40 ° from the position shown in FIG. 2 and the pivot arm 22 is swung 5 °. The wiping portion 46 at this time is extremely small.

FIG. 5 shows a view in which the protective glass 16 is rotated 80 ° from the position shown in FIG. 2 and the swing arm 22 is swung by 10 °, and FIG. 6 shows the protective glass 16 in FIG. The figure is shown in which the swing arm 22 swings by 15 ° after rotating 120 ° from the open position. At this time, the wiping portion 46 begins to spread on the outer peripheral portion of the protective glass 16 and
The total area is about 25%.

FIG. 7 shows the protection glass 16 rotated by 160 ° from the position shown in FIG. 2 and the swing arm 22 rotated by 20 °, and FIG. 8 shows the protection glass 16 shown in FIG. The figure is shown in which the swing arm 22 has swung by 25 degrees after being rotated by 200 degrees from the open position. At this time, the wiping portion 46 is
It covers approximately 60% of the outer peripheral portion of the protective glass 16 and is about 45% of the total area of the protective glass 16.

FIG. 9 shows the protective glass 16 rotated 240 ° from the position shown in FIG. 2, and the swing arm 22 has swung 30 °, and FIG. 10 shows the protective glass 16 in FIG. A view is shown in which the swing arm 22 has swung 35 degrees by 280 ° from the open position. Further, FIG. 11 shows a view in which the protective glass 16 is rotated by 320 ° from the position shown in FIG. 2 and the swing arm 22 is swung by 40 °, and FIG. 12 shows the protective glass 16 in FIG. A view is shown in which the oscillating arm 22 has been oscillated by 45 ° after being rotated 360 ° from the position. At this time, the wiping portion 46 covers the entire outer peripheral portion except the center of the protective glass 16 and is 95% of the total area of the protective glass 16.
%.

FIG. 13 shows a view in which the protective glass 16 is rotated by 400 ° from the position shown in FIG. 2 and the swing arm 22 is swung by 50 ° to the position C in FIG. At some point, the wiping of the entire surface of the protective glass 16 is completed. After that, the swing arm 22 swings in the opposite direction and returns to the initial position. As described above, in this embodiment, the swing arm 22 is swung while the protective glass 16 is rotated, and the wiper blade 42 wipes off water droplets and the like adhering to the protective glass 16. Thereby, the length of the wiper blade 42 is set to the swing arm 2
When 2 rotates and is located at the center P of the protective glass 16,
If the tip portion 44 of the wiper blade 42 is formed to have a length that overlaps the center P, the entire surface of the protective glass 16 can be wiped. Therefore, the length of the swing arm 22 can be made shorter than that of the conventional wiper device, and the position of the pivot fulcrum of the swing arm 22, that is, the position of the shaft 40 can be protected by the protective glass. Since it can be close to 16, the wiping area can be increased in a small installation space.

In the present embodiment, the rotational force transmitting means to the protective glass 16 uses the frictional force between the driving roller 20 (shown in FIG. 2) and the frame 30 of the protective glass 16, but this means has been described. However, the present invention is not limited to this, and there is a method in which belt transmission is performed by a rotary belt, or a method in which a gear is engraved on the outer peripheral surface 32 of the frame 30 and a drive gear that meshes with this gear is provided to perform gear transmission.

[0019]

As described above, according to the wiper device of the present invention, the drive motor is driven to rotate the protective glass and the arm is swung to wipe off the water droplets and the like adhering to the protective glass with the wiper blade. By doing so, the length of the arm can be made shorter than that of the conventional wiper device, and the swing fulcrum of the arm can be made closer to the protective glass than that of the conventional wiper device. Therefore, the wiping area can be increased in a small installation space.

[Brief description of drawings]

FIG. 1 is a perspective view of a housing of a television camera to which a wiper device according to the present invention is attached.

FIG. 2 is a front view of FIG.

3 is an enlarged cross-sectional view taken along line 3-3 in FIG.

FIG. 4 is an operation explanatory view of the wiper device according to the present invention.

FIG. 5 is an operation explanatory view of the wiper device according to the present invention.

FIG. 6 is an operation explanatory view of the wiper device according to the present invention.

FIG. 7 is an explanatory view of the operation of the wiper device according to the present invention.

FIG. 8 is an operation explanatory view of the wiper device according to the present invention.

FIG. 9 is an explanatory view of the operation of the wiper device according to the present invention.

FIG. 10 is an explanatory view of the operation of the wiper device according to the present invention.

FIG. 11 is an operation explanatory view of the wiper device according to the present invention.

FIG. 12 is an operation explanatory view of the wiper device according to the present invention.

FIG. 13 is an operation explanatory view of the wiper device according to the present invention.

FIG. 14 is an operation explanatory view of a conventional wiper device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Wiper device 12 ... Housing 14 ... Hood 16 ... Protective glass 18 ... Guide roller 20 ... Drive roller 22 ... Oscillating arm 30 ... Frame 34 ... Drive motor 38 ... Oscillation motor 42 ... Wiper blade

Claims (1)

[Claims] 1. A protective glass which is attached to the front surface of a lens for a television camera provided in a housing and is rotatably provided, a drive device for rotating the protective glass, and a base arranged adjacent to the protective glass. An arm provided so as to be capable of reciprocating swing with the end portion as a fulcrum, and a long wiper blade attached along the longitudinal direction of the arm for wiping off water droplets and the like adhering to the protective glass. Wiper device.