JP2579439B2 - Wiper blade - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a wiper blade of a wiper mounted on, for example, an automobile.

[0002]

2. Description of the Related Art In general, in a wiper blade of a wiper for wiping a glass surface mounted on an automobile or the like, a blade rubber for directly wiping a glass surface has a substantially uniform cross section over the entirety.

[0003]

However, since the wiper for wiping the glass surface of an automobile swings around an axis provided on the vehicle body side, the wiping area has a fan shape, and In some cases, the peripheral speed increases toward the tip end of the wiper blade.

In addition, the wiper blade is difficult to form a water film between the blade rubber and the glass surface particularly when the glass surface is in a semi-dry state or has a low swinging speed. Becomes unstable. Therefore, while the wiper swings, the blade rubber adheres to the glass surface for a very short time, and then the wiper moves and the blade rubber slides on the glass surface repeatedly due to the repulsive force of the blade rubber itself. May be asked.

[0005] Therefore, due to the difference in the peripheral speed and the generation of unstable friction, the amount of friction increases as the blade rubber approaches the tip. Therefore, the blade rubber is provided with a blade rubber having a uniform cross section. In the conventional wiper blade, there is a problem that the friction causes a state in which the repulsive elastic force changes between the distal end side and the proximal end side to cause vibration, or the wiping performance is reduced due to the friction. It has been an issue to solve such problems.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of such a conventional problem. While the amount of friction at the blade rubber increases toward the tip of the swing, the resilience of the blade rubber is reduced. By increasing toward the tip of the swing, it is possible to balance the overall wear, improve the durability of the blade rubber, prevent the occurrence of vibration and the like, and maintain good wiping performance for a long period of time. It is intended to provide a wiper blade.

[0007]

According to a first aspect of the present invention, there is provided a wiper blade which swivels in a fan shape on a glass surface of an automobile and wipes the same with a yoke constituting the wiper blade. A blade rubber having a cross-sectional shape in which a wiping portion is connected to a base portion having a small width via a bending neck portion having a small width, wherein the wiping portion has a substantially inverted triangular cross section having tapered wiping side surfaces on both sides and a wiping tip portion. While having a shape, the width of the wiping tip portion is gradually increased in the longitudinal direction toward the swing tip of the blade rubber, and the width of the bending neck portion is set at the swing tip of the blade rubber. It is configured so as to gradually increase in the longitudinal direction, and the above configuration is used as means for solving the problem.

[0008]

According to the wiper blade of the present invention, the width of the wiping tip of the wiping portion of the blade rubber is gradually increased toward the swinging tip of the blade rubber. In the blade, since the width of the wiping tip portion and the width of the bending neck portion in the wiping portion of the blade rubber are gradually increased toward the swing tip, the amount of wear on the blade rubber increases toward the swing tip. On the other hand, the repulsive elastic force of the blade rubber gradually increases toward the tip of its swing, thereby maintaining the balance of the wear of the entire blade rubber.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

FIGS. 1, 2 and 3 show an embodiment of the wiper blade according to the first and second aspects of the present invention.

That is, the blade rubber 1 is shown in FIG.
As shown in FIG. 1A, it is attached along a wiper blade 2 constituting a wiper.

The wiper blade 2 has a rivet 5 at each end of an elongated lever 4 having a pivot pin 3 at the center.
5, the center portions of the yoke levers 6, 6 are attached, and the rivets 7,
A yoke 8, 8 is attached via 7;
The blade rubber 1 is held by each of the yokes 8.

The pivot pin 3 provided at the center of the lever 4
Is provided with an attachment 9 for attaching a stay constituting the wiper.

Further, as shown in FIG. 1B, the blade rubber 1 is fitted to a yoke 8 in a sectional view taken on the base end side (left side in FIG. 1) which is a wiper swinging shaft side (not shown). Part 10
a wiping portion 11 is formed in a left-right symmetrical shape by connecting a base portion 10 having a a and a wiping portion 11 with a narrow neck portion 12 having a small width. 11 is performed smoothly.

Further, the wiping portion 11 is formed in a substantially inverted triangular shape, and at the time of actual wiping, is bent from the neck portion 12 and contacts the glass surface in an inclined state. 11a, 11a and a wiping tip 11b which is the lowermost end of the blade rubber 1.

FIG. 2 is a sectional view taken along line AA in FIG. 1A, and FIG. 3 is a sectional view taken along line BB in FIG. 1A. FIG. 2 shows a cross section of the end 1A of the blade rubber 1 near the wiper swing axis (not shown).
FIG. 3 shows a cross section of the end 1B far from the wiper swing axis. As shown in FIG. 2, the width L1 of the tip 11b of the wiping portion 11 of the blade rubber 1 at the end 1A near the wiper swing axis is at the end 1B far from the wiper swing axis shown in FIG. It is formed smaller than the width L2 of the tip 11b. The width of the tip end 11b of the blade rubber 1 is continuously changed gradually from the end 1A close to the wiper swing axis to the end 1B far from the end, and is increased. Further, in the blade rubber 1, the width L5 of the neck portion 12 at the end portion 1A near the wiper swing axis is equal to the width L5 of the neck portion 12 at the end portion 1B far from the wiper swing axis.
6 is formed smaller than that of FIG. 6, and as shown in FIG.
The width of the neck portion 12 is formed such that the width gradually increases as the width of the neck portion moves toward the tip of the swinging portion. It is formed smaller than the height L4 at the far end 1B,
It is formed so as to increase gradually and continuously from the end 1A to the end 1B.

Therefore, when the wiper blade 2 is swung about a wiper swinging shaft (not shown), the peripheral speed increases toward the tip end in addition to the partial difference in friction coefficient depending on the state of the glass surface. However, the width L2 of the distal end portion 11b of the end portion 1B far from the wiper oscillating shaft, where the amount of wear increases, is increased, and the width of the neck portion 12 is gradually increased toward the oscillating distal end. Also, the height of the blade rubber 1 is gradually increased toward the swinging tip, so that the resilience of the blade rubber 1 is gradually increased toward the swinging tip. Will be kept.

[0018]

As described above, according to the wiper blade of the first aspect of the present invention, the width of the wiping tip of the wiping portion of the blade rubber is gradually increased toward the swinging tip of the blade rubber. As a result, while the amount of wear on the blade rubber increases toward the tip of the swing, the resilience of the blade rubber gradually increases toward the tip of the swing. Excellent effect that the balance of typical wear can be balanced, and the wear of the wiper blade can be improved by preventing the abrasion and improving the durability of the wiper blade. To play. According to the wiper blade of the second aspect of the present invention, the width of the wiping tip and the width of the bending neck in the wiping portion of the blade rubber are gradually increased toward the swinging tip of the blade rubber. Accordingly, in the same manner as in the first aspect, while the amount of wear in the blade rubber increases toward the rocking tip, the resilience of the blade rubber is gradually increased toward the rocking tip. And the same effect as the first aspect can be obtained.

[Brief description of the drawings]

FIGS. 1A and 1B are a side view illustrating a wiper blade provided with a blade rubber according to an embodiment of the present invention, and a cross-sectional view taken along line AA in FIG.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a cross-sectional view taken along line BB in FIG.

[Explanation of symbols]

 Reference Signs List 1 blade rubber 2 wiper blade 8 yoke 10 base 10a fitting part 11 wiping part 11a wiping side surface 11b wiping tip part 12 neck part

Claims (2)

(57) [Claims] 1. A wiper blade for wiping by swinging in a fan shape on a glass surface of an automobile, wherein the base having a fitting portion to a yoke constituting the wiper blade is wiped through a narrow bending neck portion. A blade rubber having a cross-sectional shape in which the wiping portions are connected to each other, the wiping portion has a substantially inverted triangular cross section having tapered wiping side surfaces on both sides and a wiping tip portion, and the width of the wiping tip portion is changed by the swing of the blade rubber. A wiper blade gradually increasing in a longitudinal direction toward a moving tip. 2. The width of a bending neck portion is a blade rubber.
That it gradually increases in the longitudinal direction toward the rocking tip of
The wiper blade according to claim 1, characterized in that: