JP2546976B2 - 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 of a wiper blade in 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 the automobile swings around the swing shaft provided on the vehicle body side, the wiping region has a fan shape, When swinging, the peripheral speeds of the tip end side and the base end side of the wiper blade are naturally different.

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.

Therefore, since the blade rubber has a larger amount of wear as it approaches the tip due to the difference in peripheral speed and the occurrence of unstable friction, the blade rubber having a uniform cross section is provided. In the conventional wiper blade, there is a problem that vibration occurs due to a change in repulsive elastic force between the tip side and the base end side due to the friction, and the wiping performance deteriorates due to the abrasion, and improvement is desired. Was there.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of such conventional problems, and determines the sectional shape of the blade rubber in accordance with the partial difference in peripheral velocity and the difference in friction coefficient. It is an object of the present invention to provide a wiper blade that can balance wear resistance, improve durability of the blade rubber, prevent occurrence of vibration and the like, and maintain good wiping performance for a long period of time.

[0007]

According to a first aspect of the present invention, there is provided a wiper blade including a wiper blade for wiping a glass surface of an automobile or the like in a fan shape around a swing shaft in a fan shape. In the above, a wiper blade is provided with a blade rubber having a cross-sectional shape in which a wiping portion is continuously provided through a narrow neck to a base portion having a fitting portion to a yoke, and the length of the neck is the swinging tip of the wiper blade. And a configuration in which the number is gradually reduced toward
In a wiper blade that swings and wipes in a fan shape around a swing axis on a glass surface of an automobile, a lever, a plurality of yokes supported by the lever, and both ends of the yoke are fitted. A blade rubber having a base portion having a fitting portion and a wiping portion formed in a substantially inverted triangular cross section and connected to the base portion through a neck having a small width, and the neck of the blade rubber has a length Is formed so as to be gradually reduced in the longitudinal direction of the blade rubber, and the above-mentioned structure is used as means for solving the problem.

[0008]

In the wiper blade according to the first aspect of the present invention, the length of the wiper blade is set so that the length of the neck of the blade rubber is minimized at the tip portion where the peripheral speed during swinging is large. By continuously changing in the longitudinal direction, the impact resilience is increased as it goes to the tip, and the balance of wear of the entire blade rubber is secured.

In the wiper blade according to the second aspect of the present invention, the length of the neck is gradually reduced in the longitudinal direction of the blade rubber, so that the repulsive elastic force is gradually increased in the decreasing direction. There is.

[0010]

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

1 to 3 are views showing an embodiment of the present invention. 2 is a sectional view taken along the line AA of FIG.
FIG. 2 is a sectional view taken along line BB in FIG. 1.

The blade rubber 1 is, as shown in FIG.
It is attached along the wiper blade 2 that constitutes the wiper.

The wiper blade 2 is provided with rivets 5 at both ends of an elongated lever 4 provided with a pivot pin 3 in 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 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, the blade rubber 1 has a yoke 8 as shown in FIG. 2 which is a cross-sectional view taken along the line BB in the lateral direction of the base end portion (the left side in FIG. 1) which is the end portion near the swing shaft (not shown). The base portion 10 having the fitting portion 10a to the bottom and the wiping portion 11 are connected to each other by the neck 12 having a small width to form a symmetrical shape, and when the wiper swings due to the bending of the neck 12, the wiping portion is formed. The reversing operation of 11 is smoothly performed.

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

This blade rubber 1 has a fitting portion 10a to the yoke 8 on the upper side of the base portion 10, and has a neck 1 at the swinging tip end portion as compared with the width L3 of the neck 12 at the swinging base end portion.
2 has a larger width L4, and the width of the neck 12 gradually increases toward the distal end portion as a whole, and conversely, the upper end portion of the neck 12 cuts into the base portion 10 toward the base end portion. . That is, the neck 12 at the swing base end portion
The length L2 of the neck 12 at the swinging tip portion is smaller than the length L1 of the neck. Then, the length of the neck 12 is gradually reduced toward the swing tip of the wiper blade.

In the wiping portion 11 having the wiping side surfaces 11a, 11a on both sides and the wiping tip 11b, the width L5 of the wiping side surfaces 11a, 11a at the base end to the width L6 of the wiping side surfaces 11a, 11a at the tip end. It is formed so that it gradually becomes larger.

That is, the width of the neck 12 is increased and the neck 1 is increased toward the oscillating tip portion where the peripheral speed is increased.
By reducing the length of 2 to increase the impact resilience and increase the width of the wiping side surfaces 11a, 11a, vibration and uneven wear can be dealt with.

4 and 5 are diagrams for explaining another embodiment of the present invention.

That is, the blade rubber 1 has a yoke fitting portion 20a on the upper side of the base portion 20, and becomes wider toward the swinging tip portion and longer toward the swinging tip portion as in the above-described embodiment. In the wiping part 21, the wiping part 21 gradually increases its width from the width L7 of the wiping tip 21b at the swinging base end to the width L8 of the wiping tip 21b at the swinging tip. Further, in the wiping unit 21, the length L9 of the wiping unit 21 at the swinging proximal end portion to the length L10 of the wiping unit 21 at the swinging distal end portion.
It is formed so that its length gradually increases.

That is, since the wiping tip 21b is forcibly bent in the opposite direction when the wiper blade 2 is turned over when it is swung, the wiping section 21b is moved closer to the swiveling tip where the peripheral speed increases. Durability is improved by increasing the width and length of the.

In each of the above embodiments, although there are some overlapping portions, for example, the pressure contact force of the wiper blade contacting the glass surface and the difference in the material of the blade rubber,
Alternatively, it is more desirable to select a blade rubber having an appropriate shape according to the length of the wiper blade. In addition, since the blade rubber is mainly manufactured in a bilaterally symmetrical cross-sectional shape by a mold that is vertically divided in the longitudinal direction of the blade rubber, it is relatively easy to mold the blade rubber described in each example. Is possible.

[0024]

As described above, according to the wiper blade of the present invention, for example, when the partial peripheral speed of the wiper blade is different in addition to the change of the friction coefficient depending on the state of the glass surface, the neck length is increased. The repulsion elastic force of the blade rubber can be increased as the direction of the blade rubber gradually decreases, and thus the overall wear of the blade rubber can be balanced, and the wear of the wiper blade can be prevented by preventing hard wear. As a result of improving the property, there is an excellent effect that it is possible to prevent the occurrence of vibration and the like and maintain a good wiping performance for a long period of time.

[Brief description of drawings]

FIG. 1 is a side view illustrating a wiper blade provided with a blade rubber according to an embodiment of the present invention.

FIG. 2 is a sectional view of the blade rubber shown in FIG. 1 taken along the line AA.

3 is a sectional view of the blade rubber shown in FIG. 1 taken along the line BB.

FIG. 4 is a sectional view taken along line AA of a blade rubber according to another embodiment of the present invention.

FIG. 5 is a cross-sectional view of the blade rubber according to another embodiment of the present invention, taken along line BB.

[Explanation of symbols]

 1 Blade Rubber 2 Wiper Blade 4,6 Lever 8 Yoke 10,20 Base 10a, 20a Fitting Part 11,21 Wiping Part 12,22 Neck

Claims (2)

(57) [Claims] 1. A wiper blade having a blade rubber for swinging and wiping a glass surface of an automobile or the like in a fan shape around a swing shaft, wherein a base portion having a fitting portion to a yoke constituting the wiper blade. Equipped with a blade rubber having a cross-sectional shape in which a wiping portion is continuously provided via a neck with a small width,
A wiper blade characterized in that the length of the neck is gradually reduced toward the swing tip of the wiper blade. 2. A wiper blade that swings in a fan shape around a swing axis on a glass surface of an automobile to wipe the lever, a plurality of yokes supported by the lever, and both ends of each of the yokes. And a blade rubber having a wiping portion formed in a substantially inverted triangular cross section and connected to the base through a neck having a small width, the neck of the blade rubber The wiper blade is characterized in that its length is gradually reduced in the longitudinal direction of the blade rubber.