JPH06227368A - Ultrasonic window wiper - Google Patents

Abstract

PURPOSE:To secure a window wiper that is suitable for high speed traveling and able to protect a visual field by getting rid of a mechanical moving part heretofore in use. CONSTITUTION:A movable plate 2 consisting of transparent glass is fitted in an opening installed in a part of a windowshield 1 of an automobile as an outdoor moving body, and an ultrasonic vibrator 4 is attached to this movable plate 2 which is ultrasonically vibrated for removing a waterdrop or the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applicable to automobiles, railway vehicles,
The present invention relates to a wind wiper for a front observation window, a rear observation window, or other external observation windows made of transparent glass or the like in front of a cockpit of an outdoor moving body such as a ship or an aircraft.

[0002]

2. Description of the Related Art A conventional wind wiper, such as an automobile, has rubber attached to an arm and is swung left and right while the rubber is in contact with the window to wipe water droplets attached to the window. Some of them, such as those that rotate the transparent disk mainly attached to the window of the bridge of the ship at high speed to shake off water droplets by centrifugal force.

[0003]

Among the conventional wind wipers as described above, those which swing the arms are weak against wind pressure, and those of the high speed rotation type require a large motor to rotate the disc at a high speed. However, there is a problem that the central rotation mechanism obstructs the field of view.

An object of the present invention is to provide a wind wiper which utilizes ultrasonic vibration in order to solve the above-mentioned problems of the prior art.

[0005]

In order to solve the above-mentioned problems, the present invention is directed to a wind wiper for an external observation window in an outdoor moving body, in which water droplets are removed by ultrasonically vibrating the observation window. It was adopted.

Further, a part of the external observation window is a movable plate, and water droplets are removed by ultrasonically vibrating the movable plate, or a transparent movable plate is provided in front of a part of the external observation window. It was also installed and the movable plate was ultrasonically vibrated to remove water droplets.

[0007]

When a raindrop starts to hit a front window as an example of an observation window while an outdoor moving body such as an automobile is running, the water that hits the front window is instantaneously changed to a water droplet by ultrasonically vibrating the front window. Then it slides down and is removed. Further, even when a part of the front window is a movable plate, when the movable plate is ultrasonically vibrated, water droplets are removed by the vibration. Further, even in the case where a transparent movable plate is provided on a part of the front surface of the front window, the movable plate vibrates when rain starts and the movable plate vibrates so that raindrops can be easily removed.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In FIGS. 1 and 2, reference numeral 1 is a front window of an automobile as an example of an observation window, an opening is provided in a part thereof, and a movable plate 2 made of transparent glass is fitted in this part. A seal 3 made of rubber or the like is interposed between the movable plate 2 and the opening to movably support the movable plate 2 and maintain airtightness, and an ultrasonic transducer 4 is provided on a part of the movable plate 2. Is attached and connected to the drive circuit 5 provided inside the vehicle or the like.

In the case of this embodiment, by vibrating the movable plate 2 with ultrasonic waves, the water hitting the front window is instantaneously formed into water droplets and slides down to be removed.

In the embodiment shown in FIGS. 3 and 4, the movable plate 2 made of transparent glass is superposed at a predetermined position on the front window 1 with a slight gap. Then, a seal 6 made of rubber or the like is interposed between the periphery and the windshield 1.

Further, an ultrasonic transducer 4 is provided on a part of the movable plate 2.
The ultrasonic transducer 4 is connected to the drive circuit 5 provided inside the vehicle.

Also in this embodiment, when the movable plate 2 is ultrasonically vibrated, the water hitting the movable plate 2 instantly becomes water droplets and slides down to be removed. In this example, double glass is used. For the same reason, the inside of the front window 1 does not become cloudy.

FIG. 5 shows details of the mounting portion of the ultrasonic transducer 4. The ultrasonic vibrator 4 has been remarkably improved in recent years, and since an ultrathin ceramic vibrator has been developed, it has been extremely miniaturized. Therefore, the L-shaped metal fitting 7 is fixed to a predetermined portion of the front window 1, the ultrasonic vibrator 4 is fixed to the metal fitting 7 by means such as adhesion, and the oscillation horn 8 is adhered by means such as adhesion. Even when the structure is fixed to, the whole becomes extremely small.

As shown in FIG. 6, the drive circuit 5 includes a power supply circuit 1 connected to a battery 10 via a power supply switch 11.
2 and a converter 13 for converting the direct current of the circuit 12 into an alternating current of 10 to 20 KHz. Then, the ultrasonic transducer 4 is connected to the output terminal of the converter 13. The alternating current oscillated from the converter 13 is controlled by the knob 14.
Can be adjusted to any frequency.

Alternatively, as shown in FIG. 8, a plurality of ultrasonic vibrators 4 may be provided in the window 1 to ultrasonically vibrate the entire window. In this case, the ultrasonic transducer 4 can be embedded in the window 1. In addition to the front window as described above, it is safe to drive the vehicle if other windows are provided with movable plates that are ultrasonically vibrated by the ultrasonic oscillator 4 to widen the field of view during rainfall.

Although the embodiment has been described for the case of a car, it can be applied to all outdoor vehicles such as ships.

[0018]

As described above, the present invention is not limited to the front window of an automobile or other outdoor moving body,
Since some or all of the other windows are ultrasonically vibrated, the rain that hits the windows and the movable plate instantly becomes water drops and slides down due to ultrasonic vibrations. Therefore, good visibility can be maintained even in rainy weather.

Further, like a conventional mechanical wiper,
Since there is nothing that obstructs the field of view, such as a swinging arm and a rotation center motor, the field of view is wide even with the same area as the conventional one. Furthermore, since there is no mechanical movable object outside, it is suitable for high speed running.

[Brief description of drawings]

FIG. 1 is a front view of a first embodiment of the present invention.

FIG. 2 is an enlarged vertical side view of the above.

FIG. 3 is a front view of a second embodiment of the present invention.

FIG. 4 is an enlarged vertical side view of the above.

FIG. 5 is an enlarged front view of the ultrasonic transducer mounting portion according to the embodiment of the present invention.

FIG. 6 is a partially longitudinal side view of the above.

FIG. 7 is a circuit diagram showing an example of an oscillator circuit used in each embodiment.

FIG. 8 is a front view when the entire window is vibrated.

[Explanation of symbols]

 1 Windshield 2 Movable Plate 4 Ultrasonic Transducer 5 Drive Circuit

Claims (3)

[Claims] 1. An ultrasonic windshield wiper for an external observation window in an outdoor moving body, wherein water droplets are removed by ultrasonically vibrating the observation window. 2. The ultrasonic wind wiper according to claim 1, wherein a part of the external observation window is a movable plate, and the movable plate is ultrasonically vibrated to remove water droplets. 3. The ultrasonic wave according to claim 1, wherein a transparent movable plate is installed in front of a part of the external observation window, and the movable plate is ultrasonically vibrated to remove water droplets. Wind wiper.