JPS61215149A - Wiper blade - Google Patents

Abstract

PURPOSE:To reduce a wind pressure against a rubber and prevent water drops from depositing on a wiper area to improve visibility, by providing a vertically extending air passage at a support portion of the rubber in such a position as to correspond to an air hole of a packing. CONSTITUTION:A rubber 1 as a wiper member consists of a wiper portion 1A having an inverted triangular section adapted to contact with a window glass and a support portion 1B connected with the wiper portion 1A. A neck portion 3 of the support portion 1B is engaged with a channel 5 of a packing 4 formed of a metal plate to assemble the rubber 1 with the packing 4 as a unit. The assembly of the rubber 1 and the packing 4 is coupled with a yoke 6 and is retained by a pawl portion 7 of the yoke 6. The packing 4 is formed with a plurality of through-holes 8 at several longitudinal positions. The support portion 1B of the rubber 1 is formed with vertically extending recesses 9 in such positions as to correspond to the through-holes 8. The recesses 9 serve as an air passage opening to a side surface of the wiper blade and communicating with an upper side of the packing 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a wiper blade of a wiper device for wiping window glass of 11 cars.

[Conventional technology]

When a vehicle is running at high speed, lift and drag due to wind pressure cause
The wiper blade may rise above the window glass surface.

Conventionally, in order to prevent the wiper blade from floating, methods have been used, such as installing a feather-like object on the wiper blade to obtain blade pressing force due to wind pressure, or reducing the lift force by reducing the shape of the rubber used as the wiping body. It was getting worse. The problem with the method of installing feather-like blades is that the blade shape becomes large, obstructing forward visibility and deteriorating the appearance.
The method of reducing the size of the rubber has problems in that the pressure distribution of the wiping pressure becomes uneven and the rubber cannot sufficiently follow the curved surface of the window glass, resulting in a decrease in wiping performance.

For this reason, a wiper blade has been proposed in which a large number of air vent holes are provided laterally on the side surface of the rubber wiping part (Utility Model Application No. 70326/1983). Although this wiper blade can reduce wind pressure, it The problem is that the water droplets that are wiped off the air vent hole may pass through with the wind, so the water droplets adhere to the area where the blade wiped, making it difficult to maintain visibility. Since the rubber rigidity in the direction is weak, there has been a problem that the wiping performance is poor, such as uneven pressure distribution of the wiping pressure.

[While the invention is trying to solve j! gft,) The present invention was made to solve the above-mentioned problems, and it can reduce wind pressure on the rubber, prevent water droplets from landing on the wiping marks, ensure clear visibility, and improve the visibility during high-speed driving. The purpose is to provide wiper blades suitable for use.

[Means for solving problems]

For this reason, the present invention provides a wiper blade comprising a rubber as a wiping body, a backing for applying wiping pressure evenly to the rubber from above, and a yoke for supporting the backing and the rubber. A wiper blade characterized in that a plurality of ventilation parts are provided along the longitudinal side surface of the front surface of the blade, and a ventilation part passing in the vertical direction is provided in the cavity corresponding to the ventilation part of the backing in the holding part of the rubber. provided.

[Effect]

According to the above configuration, the wind pressure generated on the windward side of the wiper blade can be released upward from the rubber ventilation part and the backing ventilation part, and the wind pressure on the wiper blade can be reduced. Furthermore, since the air is blown upward from the ventilation part of the backing, the direction in which the air escapes is the direction in which the window is separated from the lath surface, and water droplets that have passed through the notches do not land on the wiped traces on the window glass surface. Further, since the rubber ventilation part is provided in the rubber holding part which has no relation to the vertical stiffness of the rubber, the wiping performance does not deteriorate.

〔Example〕

An embodiment of the present invention will be specifically described with reference to the drawings. FIG. 1 is a perspective view of the wiper blade, FIG. 2 is an A-Alli view of FIG. 1, and FIG. 3 is an exploded perspective view.

The rubber 1 as a wiping body consists of a wiping part IA having an inverted triangular cross section where the window contacts the lath 2, and a holding part IB continuous with the wiping part IA. The neck portion 3 of the holding portion IB is fitted into the groove 5 of the backing 4 made of a metal plate, and the rubber 1 and the backing 4 are assembled integrally. Further, the rubber 1 and the backing 4, which are integrally assembled with the yoke 6, are held by claws 7. The backing 4 is provided with a plurality of through holes 8 at appropriate intervals along its entire length. The holding part IB of the rubber 1 is provided with vertical notches 9 at locations corresponding to the through holes 8, and the notches 9 open on the side surface of the wiper blade and form a ventilation part communicating with the second part of the backing 4. ing.

The operation will be explained with reference to FIG.

When the vehicle is running at high speed, a positive pressure is generated on the windward side of the rubber 1 due to the running wind in a direction parallel to the two surfaces of the window glass, as shown by arrow B in FIG. In this embodiment, the ventilation section consisting of the notch 9 and the through hole 8 allows the traveling wind to blow through in the -L force direction as shown by the arrow C, so that the positive pressure on the windward side can be reduced, and the rubber 1 and the backing 4 It is possible to significantly reduce the wind pressure on the Therefore, the lift and drag forces acting on the wiper blade are reduced, the wiper blade can be prevented from floating during high-speed running, and overload on the wiper motor can also be prevented.

Also, the direction in which the wind blows from the windward side of rubber 1 is arrow C.
As shown in the figure, since the direction is upward in the drawing, that is, in a direction away from the window lath 2, the water droplets wiped off by the wiping part IA of the rubber 1 are carried upward by the blowing wind and reattached to the glass surface 2A where the wiping marks were left. Never.

Furthermore, since the notch 9 of the rubber 1 is provided in the holding part IB and not in the wiping part IA, the presence of the notch 9 has almost no effect on the rigidity of the wiping part IA of the rubber 1,
Since uniform wiping pressure can be obtained over the entire length of the rubber 1, wiping performance can be ensured.

In the embodiment described above, the through hole 8 is provided in the backing 4 to serve as a ventilation section, but as shown in FIG. 4, it is also possible to provide a notch 10 in the backing 4 to serve as a ventilation section.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to reduce the wind pressure on the wiper blade when the vehicle is running at speed, prevent the wiper blade from floating, and direct the wiped water droplets away from the window glass surface. The wiper blade is blown away and does not adhere to the wiper blade's wiping traces again, ensuring a clear field of view.Furthermore, uniform wiping pressure can be obtained over the entire length of the wiper blade, ensuring good wiping performance. It has excellent effects.

[Brief explanation of drawings]

The drawings show embodiments of the present invention; FIG. 1 is a perspective view, FIG. 2 is a sectional view taken along line A-A in FIG. 1, FIG. 3 is an exploded perspective view, and FIG. 4 is a backing showing another embodiment. FIG. 1...Rubber, IB...Holding part, 2...Window is lath, 4...Backing, 6...Yoke, 8,9.10
...Through holes, notches, and notches that form ventilation sections.

Claims (1)

[Claims] In a wiper blade comprising a rubber as a wiping body, a backing for applying wiping pressure evenly to the rubber from above, and a yoke for supporting the backing and the rubber, the backing has at least a side surface in the longitudinal direction of the front surface of the blade. A wiper blade characterized in that a plurality of ventilation portions are provided along the rubber holding portion, and a ventilation portion passing in the vertical direction is provided at a location corresponding to the ventilation portion of the backing in the holding portion of the rubber.