JPH06183317A - Windshield wiper for vehicle - Google Patents

Abstract

(57) [Summary] [Purpose] For vehicles equipped with windshield glass with a water-repellent coating on the surface, wiper
(EN) Provided is a vehicle wiper device which prevents deterioration of visibility by suppressing a local decrease in water repellency at a reversal position of a blade. [Means for varying the reversal position of a reciprocating wiper blade 3 within a predetermined range W in a vehicle equipped with a windshield glass 1 having a water-repellent coating on its surface (parts 11 to 16) ), It is possible to disperse the reversal positions where the water-repellent coating agent is most likely to be peeled off, thereby suppressing the local decrease in water repellency as compared with the case where the reversal positions are constant. .

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle wiper device, and more particularly to a vehicle wiper device suitable for a vehicle provided with a windshield glass having a water-repellent coating treatment.

[0002]

2. Description of the Related Art A conventional vehicle wiper device is disclosed, for example, in Japanese Patent Application Laid-Open No. 2-299956. FIG. 4 shows the wiper device as described above, which is currently installed in a normal vehicle. In FIG. 4, 1 is a windshield glass of the front windshield of the vehicle, 2 is a wiper blade on the driver's side, and 3 is a windshield.
Is a wiper blade on the passenger side, 4 and 5 are wiper arms, 6 is a pivot, 7 and 8 are link rods, and 9 is a wiper motor. In the above-mentioned wiper device, the rotation of the motor 9 is transmitted to the two wiper arms 4 and 5 via the link rods 7 and 8, whereby the wiper arms 4 and 5 reciprocate to thereby wipe the wiper blade. 2 and 3 are wind shields
While reciprocating while contacting the surface of the glass 1, the surface of the windshield glass 1 is wiped. In addition, recently, in order to improve the visibility of drivers and the like in rainy weather, glass with a water-repellent coating on the surface is used as the windshield, or a water-repellent coating is applied on the surface of ordinary windshields. The chemicals to be applied are developed and sold.

[0003]

However, as described above, in the conventional wiper device, the wiper blades 2 and 3 reciprocate while contacting the surface of the windshield glass 1, thereby wiping the surface. The water repellent coating agent gradually peels off. In particular, since the reversal position of the wiper blade, that is, the positions of both ends of the reciprocating motion were constant, the water-repellent effect of that part declined faster than other parts, and moisture adhered only to that part, making it visible locally. Sex decreases. K in Figure 4
1, K2, K3, and K4 indicate the portions where the water repellency effect is reduced. Of the above four parts, K1, K2
Since the portions K4 and K4 correspond to the end portions of the glass surface, even if water adheres, the visibility is not so badly affected. However, the portion K3, that is, the position where the wiper on the passenger side is reversed from the opening direction to the closing direction is located at the center of the windshield, so that the local decrease in water repellency at that position is There was a problem that there was a fear that the visibility was considerably deteriorated.

The present invention has been made to solve the problems of the prior art as described above, and in a vehicle having a windshield glass having a water-repellent coating on the surface thereof, the wiper blade is inverted. An object of the present invention is to provide a vehicular wiper device that prevents deterioration of visibility by suppressing a local decrease in water repellency at a position.

[0005]

In order to achieve the above object, the present invention is constructed as described in the claims. That is, in the present invention, a vehicle having a windshield glass having a water-repellent coating on the surface thereof is provided with means for varying the reversal position of the reciprocating wiper blade within a predetermined range. is there. It should be noted that both the driver side and the passenger side wiper blades may be provided with means for changing the reversal position, but as mentioned above, the visibility is particularly adversely affected by the fact that the passenger side wiper is in the opening direction. Since it is a position which is reversed in the closing direction, the means for changing the reversal position may be provided only in that part.

[0006]

[Function] By changing the reversal position of the reciprocating wiper blade within the predetermined range, the reversal position where the water-repellent coating agent is most likely to be peeled can be dispersed, whereby the reversal position is constant. It is possible to suppress a local decrease in water repellency than the case.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.
FIG. 1 is a diagram showing an embodiment of the present invention, and shows an example in which a mechanism for changing the reverse position of the wiper blade on the passenger side is provided. In FIG. 1, 1 is a windshield glass of the front windshield of the vehicle, 2 is a wiper blade on the driver side, 3 is a wiper blade on the passenger side, 4 and 5 are wiper arms, 6 is a pivot, 7 and 8
Is a link rod, and 9 is a wiper motor. Further, 11 is a shaft drive motor, 12 is a worm gear, and 13
Is a wheel gear, and 14, 15 and 16 are members. The parts 11 to 16 are the parts added in this embodiment.

Next, FIG. 2 is an enlarged view of the above-mentioned additional portion. In FIG. 2, A is the axis of the wiper arm 5 on the passenger side, B is the axis at which the member 14 is rotatably stopped by the wheel gear 13, and C is the link rod 7, member 14 and member 15. A shaft that is rotatably stopped, D is a shaft of the wheel gear 13, and other reference numerals that are the same as those in FIG. Next, FIG. 3 is a diagram for explaining the operation of the portion shown in FIG. 2, and the same reference numerals as those in FIG. 2 indicate the same parts.

The operation of the embodiment shown in FIG. 1 will be described below with reference to FIGS. 2 and 3. In the conventional example shown in FIG. 4, the shaft A and the shaft C are connected by one member, but in the present embodiment, the shaft A and the shaft C are connected by the members 15 and 16 as illustrated. In addition, the position of the axis C can be changed. In order to change the position of the shaft C, the rotation of the shaft drive motor 11 is transmitted to the wheel gear 13 via the worm gear 12, and the wheel gear 13 is rotated.
Is rotated about the axis D, and the position of the eccentric axis B is moved. That is, FIG.
When the position of the axis B is changed to the position of B'with respect to the position shown by the solid line, the axis A-axis C changes to the axis A-axis C ', and the reverse position of the wiper arm 5 becomes Change from X to X '. Therefore, during sliding of the wiper, the shaft drive motor 1
By driving 1 cyclically, the position of the axis B can be repeatedly changed between the solid line position B and the broken line position B ′, whereby the wiper reversal position can be changed between X and X ′. it can. By the above operation,
The inversion position of the wiper blade 3 varies within the range indicated by W in FIG. As described above, by changing the reversal position of the wiper blade, particularly the reversal position (position K3 in FIG. 4) of the wiper blade on the passenger side, which changes from the opening direction to the closing direction, within a predetermined range, It is possible to suppress the deterioration of the water repellency, and thereby prevent the deterioration of the visibility of the driver.

[0010]

As described above, according to the present invention, the reversal position of the reciprocating wiper blade is varied within a predetermined range, so that the water-repellent coating agent is most easily peeled off. Since it is possible to disperse the reversal positions, it is possible to suppress a local decrease in water repellency, and thus it is possible to obtain an effect of preventing deterioration of visibility.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a partially enlarged perspective view of the embodiment shown in FIG.

FIG. 3 is a diagram for explaining the operation of the portion of FIG.

FIG. 4 is a diagram showing an example of a conventional device.

[Explanation of symbols]

1 ... Vehicle front windshield shield
Glass 2 ... Wiper blade on driver side 3 ... Wiper blade on passenger side 4, 5 ... Wiper arm 6 ... Pivot 7, 8 ... Link rod 9 ... Wiper motor 11 ... Shaft drive motor 12 ... Warm Gear 13 ... Wheel gears 14, 15, 16 ... Member A ... Shaft of wiper arm 5 on the passenger side B ... Shaft C on which member 14 is rotatably stopped on wheel gear 13 ... Link rod 7 Shaft D in which member 14 and member 15 are rotatably stopped D ... Shaft of wheel gear 13

Claims (1)

[Claims] 1. A vehicle having a windshield glass having a water-repellent coating on its surface, comprising means for varying the reversal position of a reciprocating wiper blade within a predetermined range. Wiper device for vehicles.