JPH0710661B2 - 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 Generally, in a wiper blade of a wiper for wiping a glass surface, which is installed in an automobile or the like, a blade rubber for directly wiping the glass surface has a cross-section formed into a substantially uniform shape.

[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.

Further, the wiper blade is difficult to form a water film between the blade rubber and the glass surface, especially when the glass surface is in a semi-dried state or when the rocking speed is slow, so that it is difficult to form a water film on the glass surface. The friction coefficient of becomes unstable. Therefore, when the wiper swings, the blade rubber adheres to the glass surface for a minute 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. There are times when you are told.

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. The conventional wiper blade has a problem that vibration is generated due to a change in repulsive elastic force between the tip end side and the base end side due to the friction and the wiping performance is deteriorated due to the abrasion.

[0006]

SUMMARY OF THE INVENTION The present invention has been made by paying attention to such conventional problems, and determines the sectional shape of the blade rubber in accordance with partial differences in peripheral velocity and friction coefficient. Balances the typical wear,
An object of the present invention is to provide a wiper blade capable of improving the durability of the blade rubber, preventing the occurrence of vibration and the like, and maintaining 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 having a blade rubber which is swung in a fan shape on a glass surface of an automobile around a swing shaft to wipe the wiper blade. In the above, the blade rubber includes a base portion having a fitting portion that is fitted to the yoke that constitutes the wiper blade, and a wiping portion that is connected to the base portion via a neck portion having a small width. The portion is formed such that the length from the connection portion with the neck portion to the tip end portion is smaller at the end portion closer to the swing shaft than at the end portion far from the swing shaft, and the length is smaller than that of the swing shaft. It is configured such that it is formed by gradually increasing from a near end portion to a far end portion to a swing shaft, and according to claim 2, it swings in a fan shape around the swing shaft on a glass surface of an automobile. For wiper blade with blade rubber to wipe The blade rubber includes a base portion having a fitting portion that is fitted to the yoke that constitutes the wiper blade, and a wiping portion that is connected to the base portion via a neck portion having a small width. The portion is formed such that the length from the connection portion with the neck portion to the tip portion is smaller at the end portion closer to the swing shaft than at the end portion far from the swing shaft,
The length is formed by continuously increasing gradually from the end near the swing shaft to the end far from the swing shaft, and the width of the tip end is
Compared to the end farther from the rocking axis, it is formed smaller at the end closer to the rocking axis, and its width is gradually increased from the end near the rocking axis to the end far from the rocking axis. In the wiper blade having a blade rubber that swings in a fan shape around a swing axis on a glass surface of an automobile and wipes the blade surface, the blade rubber comprises:
A base portion having a fitting portion that is fitted to the yoke that constitutes the wiper blade, and a wiping portion that is connected to the base portion via a neck portion having a small width, and the wiping portion is a neck portion. The length from the connecting portion to the tip portion is formed smaller at the end portion closer to the swing shaft than at the end portion far from the swing shaft, and the length is from the end portion close to the swing shaft to the swing shaft. The width of the neck portion is formed so that the width of the neck portion is smaller at the end portion closer to the swing shaft than at the end portion far from the swing shaft. It is configured such that it gradually increases from the end near the end of the swing shaft to the end far from the swing shaft, and according to claim 4, it swings in a fan shape around the swing shaft on the glass surface of the automobile. In a wiper blade for wiping with a lever, a lever, a plurality of yokes supported by the lever, and the yoke. A base having a fitting portion fitted to each end and a blade rubber having a wiping portion formed in a substantially inverted triangular cross-section and continuously connected to the base through a neck portion having a small width, The wiping portion of the blade rubber is configured such that the length from the connection portion with the neck portion to the tip of the wiping portion is formed such that the length is continuously and gradually increased in the longitudinal direction of the blade rubber. As a means to solve

[0008]

With the wiper blade according to the present invention,
At the tip where the peripheral speed during swinging is large, the length is continuous in the longitudinal direction of the blade rubber so that the length from the connection with the neck to the tip of the wiping part of the blade rubber becomes maximum. By changing to, the wear balance of the entire blade rubber is maintained.

[0009]

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

FIGS. 1, 2 and 3 are views showing an embodiment of the present invention.

That is, the blade rubber 1 is shown in FIG.
As shown in (a), 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 having a pivot pin 3 at the center.
The central portions of the yoke levers 6 and 6 are attached via 5, and the rivets 7 and 6 are also attached to both ends of the yoke lever 6, respectively.
The yokes 8 and 8 are 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
An attachment 9 for attaching a stay forming a wiper is provided on the.

The blade rubber 1 is fitted to a yoke 8 as shown in FIG. 1 (b), which is a cross-sectional view of the base end portion (left side in FIG. 1) on the wiper swing shaft side (not shown). Part 10
A base portion 10 having a and a wiping portion 11 are connected in series by a neck portion 12 having a small width to form a bilaterally symmetrical shape, and when the wiper swings due to the bending of the neck portion 12, the wiping portion 1 is formed.
The reversing operation of 1 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 portion 12 at the time of actual wiping, and has a tapered wiping side surface. It has 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. FIG. 2 shows a cross section of the end portion 1A of the blade rubber 1 near the wiper swing shaft (not shown).
FIG. 3 shows a cross section of the end portion 1B far from the wiper swing axis. As shown in FIG. 2, the end portion 1 near the swing axis of the wiper
The wiping part 11 and the neck part 1 of the blade rubber 1 in A
Length L3 from the connection portion 11c with 2 to the tip portion 11b
Is smaller than the length L4 from the connecting portion 11c to the tip portion 11b at the end portion 1B far from the wiper swing axis shown in FIG. Then, the blade rubber 1 goes from the end portion 1A near the wiper swing axis to the end portion 1B far from the wiper swing axis,
In the longitudinal direction, the length from the connecting portion 11c of the wiping portion 11 to the neck portion 12 to the tip portion 11b is formed so as to continuously and gradually change and increase. Further, the blade rubber 1 has the width of the neck portion 12 and the wiping portion 1
The width of the tip portion 11b of the end portion 1 of FIG.
Compared with the widths L6 and L2 in B, the widths L5 and L1 in the end portion 1A closer to the wiper swing axis are formed smaller.
The widths of the neck portion 12 and the tip portion 11b continuously and gradually increase in the longitudinal direction from the end portion 1A near the wiper swing axis to the end portion 1B far from the wiper swing axis.

Therefore, when the wiper blade 2 is swung about the wiper swing shaft (not shown), the peripheral velocity increases toward the tip side in addition to the partial difference in the friction coefficient depending on the state of the glass surface. Therefore, the width of the neck portion 12 is gradually increased toward the swing tip, and the length from the connection portion 11c with the neck portion 12 to the tip portion 11b of the wiping portion 11 is gradually increased toward the swing tip. As a result, the repulsive elastic force is gradually increased toward the swinging tip, and the wear balance of the entire blade rubber 1 is maintained.

[0018]

As described above, according to the wiper blade of the present invention, for example, when the peripheral speed of the wiper blade differs in addition to the change of the friction coefficient depending on the state of the glass surface, the blade rubber It is possible to balance the overall wear of the wiper blade and prevent hard wear to improve the durability of the wiper blade.As a result, it is possible to prevent generation of vibrations and maintain good wiping performance for a long time. Produce the effect.

[Brief description of drawings]

FIG. 1 is a side view (a) for explaining a wiper blade provided with a blade rubber according to an embodiment of the present invention and a sectional view (b) taken along the line AA in FIG.

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

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Blade rubber 1A End near swing shaft 1B End far from swing shaft 2 Wiper blade 8 Yoke 10 Base 10a Fitting portion 11 Wiping portion 11a Wiping side surface 11b Wiping tip portion 11c Connection portion 12 Neck

Claims (4)

[Claims] 1. A wiper blade provided with a blade rubber that swings in a fan shape around a swing shaft on a glass surface of an automobile to wipe the blade, the blade rubber being fitted to a yoke constituting the wiper blade. A base portion having a fitting portion to be attached, and a wiping portion continuously provided to the base portion via a neck portion having a small width, and the wiping portion has a length from a connection portion with the neck portion to a tip portion. The end portion closer to the swing shaft is formed smaller than the end portion farther from the swing shaft, and its length continuously increases from the end portion close to the swing shaft to the end portion far from the swing shaft. A wiper blade characterized by being formed by. 2. A wiper blade provided with a blade rubber that swings in a fan shape around a swing shaft on a glass surface of an automobile and wipes the blade rubber, wherein the blade rubber is fitted to a yoke forming the wiper blade. A base portion having a fitting portion to be attached, and a wiping portion continuously provided to the base portion via a neck portion having a small width, and the wiping portion has a length from a connection portion with the neck portion to a tip portion. The end portion closer to the swing shaft is formed smaller than the end portion farther from the swing shaft, and its length continuously increases from the end portion close to the swing shaft to the end portion far from the swing shaft. The width of the tip is smaller at the end closer to the rocking shaft than at the end farther from the rocking shaft. A wiper blur characterized in that it is formed so as to continuously increase gradually to the far end. Mode. 3. A wiper blade provided with a blade rubber that swings in a fan shape around a swing shaft on a glass surface of an automobile and wipes the wiper blade, wherein the blade rubber is fitted to a yoke forming the wiper blade. A base portion having a fitting portion to be attached, and a wiping portion continuously provided to the base portion via a neck portion having a small width, and the wiping portion has a length from a connection portion with the neck portion to a tip portion. The end portion closer to the swing shaft is formed smaller than the end portion farther from the swing shaft, and its length continuously increases from the end portion close to the swing shaft to the end portion far from the swing shaft. The width of the neck portion is smaller at the end near the swing shaft than at the end far from the swing shaft, and the width is far from the end near the swing shaft to the swing shaft. A wiper braid characterized by being formed so as to be continuously and gradually increased to the end De. 4. A wiper blade that swings in a fan shape around a swing shaft 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 continuously formed on the base portion via a neck portion having a small width, the base portion having a fitting portion to be fitted to the base rubber, and a cross section of a substantially inverted triangular shape. The wiping unit is
A wiper blade, characterized in that the length from the connecting portion with the neck portion to the tip of the wiping portion is formed by continuously and gradually increasing in the longitudinal direction of the blade rubber.