JPH01122755A - Wiper device - Google Patents

Abstract

PURPOSE:To make it possible to wipe off rain drops without the necessity of a wiper blade by providing an electric wire for generating a magnetic field normal to a windshield pane and electrodes for generating an electric field perpendicular to the magnetic field, on the surface of the windshield pane. CONSTITUTION:When a voltage from a voltage power source 4 is applied between digital shape electrodes 2a, 2b which are arranged on a windshield pane 1 forming the front surface of an automobile, being staggered with each other, an electric field E is effected between the digits of the electrodes 2a, 2b in the direction X. Meanwhile, when a power from a current power source 5 is applied to an electric wire 3 which is laid on the windshield pane 1, meandering thereon, a magnetic field H is generated. In this condition, when rain drops 6 fall between the digits of the electrodes 2a, 2b, current runs through the rain drops in the direction of the electric field E due to the latter so as to produce a Lorentz's force in the direction F in accordance with the Fleming's left-hand law, and accordingly, the rain drops 6 are moved in the direction F, thereby they are removed from the windshield pane.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a wiper device using electric wires for generating a magnetic field and electrodes for generating an electric field.

As the conventional technology is well known, illustrations are omitted, but a wiper blade made of rubber or the like is driven by a motor and moved on the glass, as is normally used in automobiles, to remove water droplets that fall on the glass. Wipe it off.

Problems to be Solved by the Invention However, the wiper device having the above structure has a total of three problems, two safety problems and one economic problem, as described below.

The first is that the wiper blade is in the driver's field of vision, so visibility is obstructed by the wiper blade. Second, it significantly reduces the driver's ability to detect danger. This is due to the characteristics of the human eye. In other words, human eyes tend to react to moving objects, and this allows them to detect dangers while driving, such as unexpected jumps, but as the wiper blade moves within the field of vision, the eye's reaction to moving objects is dispersed. As a result, the driver's ability to detect danger is significantly reduced. Third, wiper blades made of rubber have a short lifespan and require maintenance (inspection, replacement).

In view of the above, an object of the present invention is to provide a semi-permanent wiper device that does not require maintenance (inspection or replacement) and does not impair the driver's visibility and ability to detect danger.

Means for Solving the Problems The present invention provides a wiper device comprising an electric wire that generates a magnetic field perpendicular to the glass surface, and an electrode that generates an electric field on the glass surface in a direction perpendicular to the magnetic field. It is.

Effect of the present invention Due to the above-mentioned configuration, a current flows through a water droplet falling between electrodes on a glass surface in the direction of an electric field between the electrodes, and a magnetic field generated perpendicular to the glass surface and a current between the electrodes flow. A Lorentz force is generated perpendicular to the electric field according to Fleming's left-handed law. Under the influence of this Lorentz force, water droplets that have fallen between the electrodes on the glass surface move and are removed.

Embodiment FIG. 1 shows a plan view of a wiper device according to an embodiment of the present invention. In the figure, 1 is a glass plate that forms the front of an automobile, etc., 2m and 2b are electrodes that generate an electric field, 3 is an electric wire that generates a magnetic field, 4 is an electrode 2N, a voltage source that applies voltage to 2b, and 6 is an electric wire. 3 is a current source that supplies current, and 6 is a water droplet that has fallen onto the glass plate 1. Electrode 2
1L and 2b are comb-shaped, and the pitch of the comb teeth is 2.
P, <L tooth length is l. In addition, electric wire 3. Electrodes 2a, 2
b may be placed on the surface of the glass plate 1 or embedded, and the electric wire 3 and the electrodes 2a and 2b are insulated.

The operation of the wiper device of this embodiment configured as described above will be described below. Electrode 2&.

A voltage is applied between 2b by a voltage source 4. That is, a positive voltage is applied to the electrode 21L and a negative voltage is applied to the electrode 2b.

Since l>P, an electric field E is generated in the X direction between the comb teeth of the electrodes 21L and 2b, as shown in the figure.

When a current is passed through the wire 3 in the direction shown in the figure by the current source 6, the magnetic field shown in FIG. 1 is generated. A water droplet 6 is attached to the electrode 2a as shown in the figure.

When the droplets 6 fall between the teeth of the comb 2b, the electric field E causes the water droplets 6, which are rainwater or the like, to be conductive and cause a current to flow in the direction of the electric field E.
A Lorentz force is generated in the F direction shown in the figure according to Fleming's left-hand rule, and the water droplet 6 moves in the F direction and is removed from the glass plate 1.

As described above, according to this embodiment, by providing an electric field on the glass surface that generates an electric field in the direction perpendicular to the glass surface and an electric field in the direction perpendicular to the first magnetic field, it is possible to water droplets can be moved and removed.

In this embodiment, the electrodes 2&, 2b and the electric wire 3 are provided on the glass plate 1, i.e., installed or embedded in the glass plate 1, but they are covered over the glass plate 1 only when necessary, such as during rain. You can also use it as Furthermore, electric wire 3
If it is made of superconducting material, a highly efficient wiper device can be created. That is, ceramics (SrB
aYCu507-δ etc.), a strong magnetic field can be formed with high efficiency and the wiper effect can be improved.

As described in detail, the present invention reduces the danger to drivers by providing an electrode on the glass surface that generates a magnetic field in a direction perpendicular to the glass surface and an electric field in a direction perpendicular to the magnetic field. This technology has the advantage of being able to remove water droplets on the glass plate without moving the wiper blade, which would impair its sensing ability, and because it eliminates the need for wiper blades or other short-lived items, it creates a semi-permanent wiper device that requires no maintenance. 0

[Brief explanation of the drawing]

- is a schematic plan view of a wiper device according to an embodiment of the present invention 0 1...Glass plate, 2a, 2b...Electrode, 3...Electric wire, 4... ...Voltage source, 6...
...Current source, 6...Water drop.

Claims (2)

[Claims] (1) A wiper device comprising: an electric wire that generates a magnetic field perpendicular to the glass surface; and an electrode on the glass surface that generates an electric field perpendicular to the magnetic field. (2) The wiper device according to claim 1, wherein the electric wire that generates a magnetic field perpendicular to the glass surface is made of a superconducting material.