JPH061204A - Wiper for vehicle - Google Patents

Abstract

PURPOSE:To provide a wiper for a vehicle for securing good visibility. CONSTITUTION:A blade 9 is formed with a wiping part 10 and a holding part 11, and the wiping part 10 and the holding part 11 are connected together with a connecting part 35 comprising the first connecting part 27 and the second connecting part 28, which are narrower than the wiping part 10 or the holding part 11. Projecting edges 15, 19, which project along the longitudinal direction of the blade 9, are arranged on both right and left sides between the first and the second connecting parts of the connecting part 35, and clamping edges 13, 16, 17, 18, which form pairs above and below packings 14 to clamp them, are arranged at the holding part, 11 along the longitudinal direction. The blade 9 ms held by jaws 20 and 26. The gap between the second connecting part 28 and the jaw 20 or 26 is formed to be wider at the lower part and narrower at the upper part along the longitudinal direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle wiper for wiping a window glass surface.

[0002]

2. Description of the Related Art A conventional vehicle wiper used in a vehicle is disclosed in, for example, Japanese Utility Model Laid-Open No. 63-98266, which will be described with reference to FIGS. FIG. 6 is a view showing the vehicle wiper and its surroundings, and FIG. 7 is a view of FIG.
It is a partially abbreviated figure of-A cross section.

A wiper blade (hereinafter referred to as a blade) 2 for wiping a window glass 1 is a wiper arm 3
The wiper arm 3 is swingable around a swing shaft 4.

Further, as shown in the sectional view of FIG. 7, the blade 2 wipes the surface of the window glass 1 at a substantially constant angle with respect to the window glass 1. The angle formed by the window glass 1 and the tip lip portion 2a of the blade 2 is called a lip contact angle θ.

[0005]

However, in such a vehicle wiper, when the lip contact angle θ is increased, the water film thickness of the window glass can be made uniform and thin. The phenomenon that the blade flutters during operation, so-called wiper judder is likely to occur, moisture that was not wiped off by this wiper judder is generated as water streaks in the vertical direction at several places on the window glass, which deteriorates visibility. I was letting it.

When the blade lip contact angle θ is reduced, the wiper judder described above can be suppressed, but the wiping ability of the window glass is reduced and the window glass is left unwiped. The water film thickness of the glass became thick, and the water film thickness was not uniform on the window glass, resulting in poor visibility.

As described above, the control of the wiper judder and the control of the unwiped portion of the water are not compatible with each other, and the visibility is deteriorated.

In recent years, some window glasses for vehicles have been subjected to water repellent treatment, and this water repellent glass has a function of repelling water. Therefore, the wiping performance required for the wiper used for this water-repellent glass does not equalize the thickness of the water film on the window glass surface like a general wiper, but it does not remove the water film on the window glass surface. A complete wipe is required.

Therefore, the wiper used for the water-repellent glass is
It is desirable to increase the lip contact angle θ of the blade, and by doing so, the water film on the window glass can be wiped off. However, on the other hand, the wiper judder is likely to occur, and the visibility is deteriorated by the wiper judder as described above.

If the lip contact angle θ of the blade is reduced in order to suppress this, the wiping performance of the wiper deteriorates, leaving a water film on the surface of the window glass, which water repellency of the window glass. As a result, fine water droplets momentarily remain on the surface of the window glass, and the water droplets cause a momentary whitening of the window glass (hereinafter referred to as a white film phenomenon), which deteriorates visibility.

Further, when the wiper judder occurs on the window glass, the wiper judder can be suppressed by reducing the lip contact angle θ of the blade particularly in the portion near the swing axis of the wiper (hereinafter referred to as the lower part).
It is possible to suppress deterioration of visibility. Further, when the white film phenomenon occurs on the window glass, the white film can be suppressed by increasing the lip contact angle θ of the blade particularly in the part farther from the swing axis of the wiper (hereinafter, referred to as the upper part), so that the visibility is improved. The deterioration can be suppressed.

An object of the present invention is to provide a vehicle wiper having good visibility.

[0013]

According to a first aspect of the present invention, a wiping portion for wiping a wiping surface of a window glass, a holding portion, and a connecting portion for connecting the wiping portion and the holding portion are integrally formed. And a wiper blade of an elastic body having a cross-sectional width in the wiping direction of the window glass in the vicinity of the connecting portion of the wiping portion is wider than a cross-sectional width of the connecting portion in the wiping direction, and the connecting portion. A claw for restricting displacement of the connecting portion in the wiping direction with a predetermined gap in the wiping direction from the wiper blade, and the gap between the connecting portion and the claw is It is configured such that it gradually decreases from the inner peripheral side end portion for wiping the window glass surface in the longitudinal direction toward the outer peripheral side end portion.

Further, in the second aspect of the present invention, the wiping portion for wiping the wiping surface of the window glass, the holding portion, and the connecting portion for connecting the wiping portion and the holding portion are integrally formed, and the wiping portion is formed. A wiper blade of an elastic body having a cross-sectional width in the wiping direction of the window glass wider than the cross-sectional width in the wiping direction of the connecting portion, and a claw supporting the holding portion, and the holding portion and A gap A between the end in the wiping direction of the fixed portion including the claw and the end in the wiping direction of the wiping portion, the central portion in the wiping direction of the fixed portion, and the center of the wiping direction in the wiping portion. The ratio A / B of the length to the portion B is gradually reduced from the inner peripheral side end portion for wiping the window glass surface in the longitudinal direction of the wiper blade toward the outer peripheral side end portion.

[0015]

With the configuration as described above, the lip contact angle between the window glass and the wiping portion of the wiper blade gradually changes in the longitudinal direction of the wiper blade. Therefore, it is possible to prevent the wiper judder and the water left unwound on a general window glass, and it is possible to improve the visibility during the wiper operation during rain.

When the vehicle wiper having the above structure is applied to the water-repellent window glass, the wiper judder and the white film phenomenon can be suppressed, and the visibility during the wiper operation during rain can be improved.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. 1 is a side view showing a main part of the wiper with a part omitted, FIG. 2 (a) is a sectional view taken along line BB of FIG. 1, and FIG. 2 (b) is a sectional view taken along line CC of FIG.

First, the supporting structure of the blade 9 will be described.

In FIG. 1, the first stay 40 of the wiper 60 is shown.
A holding portion 30 for holding the blade 9 on a swing arm (not shown) through the stay 40 is provided on the stay 40, and the stay 40 includes second and third stays 4 which serve as intermediate stays.
1, 42 are connected by pivots 50, 51. The second and third
The left and right ends of the blade 9 are held by the claws 20 and 26 at one end of the stays 41 and 42, and the pivotal support portion 5 at the other end is held.
Fourth and fifth stays 43 and 44 are connected to the reference numerals 2 and 53.

Further, the blade 9 is clamped by the claws 21, 24, 25 provided at the respective ends of the fourth and fifth stays 43, 44, and the pivots provided at the ends of the fourth stay 43. Branch
A sixth stay 45 is connected to 54. Further, the blade 9 is held by the claws 22 and 23 provided at each end of the stay 45. In this embodiment, six stays,
Seven claws are provided, but the number is not limited.

The wiper 60 has the claw 20 side on the lower side (left side in the drawing) and the claw 26 side on the upper side (right side in the drawing).

Next, referring to the sectional view shown in FIG.
The nails 20 to 26 will be described.

The blade 9 is composed of a wiping portion 10 and a holding portion 11. The wiping part 10 and the holding part 11 are composed of a first connecting part 27 and a second connecting part 28 which are narrower than the widths of the wiping part 10 and the holding part 11.
Are connected by a connecting portion 35 composed of and. Protruding edges 15 and 19 protruding along the longitudinal direction of the blade 9 are provided on both left and right sides between the connecting portions 35, and the holding portion 11 holds a pair of upper and lower holding edges 13, 15, 17, 19 for holding the packing 14. Are provided along the length direction. Also this blade 9
Is attached to the second stay 41 by the claw 20 at the lower tip.
Supported by. Similarly, the blade 9 is supported on the third stay 42 by the claw 26 at the upper end.

Here, as shown in FIGS. 2 (a) and 2 (b), the upper tip and the lower tip of the blade 9 have claws.
There is a difference in the gap between 20, 26 and the second connecting portion 28. The claws 20 to 26 are formed such that the clearance between the claw and the second connecting portion 28 is widest on the lower tip side of the blade 9 and becomes narrower toward the upper tip side. That is, in FIG. 1, the gap between the claw and the second connecting portion 28 is the claw 20 part> the claw 21 part> the claw 22.
The part> the claw 23 part> the claw 24 part> the claw 25 part> the claw 26 part, and the claws 20 to 26 are arranged so that the gap between the claw and the second connecting portion 28 becomes gradually narrower from the left side to the right side in the drawing. To form.

Here, the operation of the wiper 60 will be described in detail.

During operation of the wiper 60, the lower tip portion (FIG. 2A) of the blade 9 has the widest gap between the second connecting portion 28 and the claw 20, so that the second connecting portion 28 is easily bent. Therefore, the lip contact angle θ is the smallest. Further, the upper tip portion (FIG. 2 (b)) of the blade 9 is connected to the second connecting portion 28 and
The second connecting portion 28 because the gap of 26 is the narrowest
Is difficult to bend, the lip contact angle θ becomes the largest.
Further, as described above, the gap between the second connecting portion 28 and the claw is gradually narrowed in the longitudinal direction of the wiper 60 from the lower tip end portion to the upper tip end portion, so that the lip contact angle θ is increased from the lower tip end portion side. It gradually increases toward the tip side.

Therefore, in a general window glass, it is possible to suppress the wiper judder generated at the lower tip portion and the unwiped portion of the water generated at the upper tip portion, and it is possible to wipe the wiper when it is raining.
The visibility of the 60 during operation can be improved.

Also, wiper 60 on the water-repellent window glass
When applying, the white film phenomenon that is likely to occur at the upper tip portion and the wiper judder phenomenon that is likely to occur at the lower tip portion are less likely to occur, and the visibility when the wiper 60 is operated in the rain is improved. Has the effect of being able to improve.

Next, a second embodiment will be described with reference to FIG.
3A is a sectional view of the upper tip of the blade 80, FIG.
(B) is a cross-sectional view of the lower tip. Further, in FIG. 3, the configuration such as packing is omitted.

Since the structure of the stay and the like for supporting the blade 80 is the same as that of the first embodiment, detailed description thereof will be omitted here.

The blade 80 is composed of a wiping portion 77 and a holding portion 76. The wiping unit 77 and the holding unit 76 are the wiping unit 77.
The connecting portions 73 are narrower than the holding portion 76, and projecting edges 72 projecting along the longitudinal direction of the blade 80 are provided on both left and right sides of the connecting portions 73. Further, the wiping portion 77 has a substantially inverted triangular shape and has a lip shoulder portion 74.

The upper tip portion of the blade 80 (FIG. 3A) has the narrowest gap between the tip portion of the lip shoulder 74 and the projecting edge 72. The lower tip portion (FIG. 3B) has the widest gap between the tip portion of the lip shoulder portion 74 and the projecting edge 72. This gap is narrower on the upper tip side and the blade 80
Is gradually changed in the longitudinal direction of the blade 80 and becomes wider on the lower tip end side of the blade 80.

Here, the case where the wiper is pressed by the window glass 1 to operate will be described in detail.

The upper tip of the blade 80 (FIG. 3 (a))
Has a narrowest gap between the tip portion of the lip shoulder portion 74 and the projecting edge 72 when it is pressed by the window glass 1 to operate, so that the lip shoulder portion 74 and the projecting edge 72 are immediately separated from each other. Due to the contact, the connecting portion 73 bends only slightly. Therefore, the lip contact angle θ becomes the largest. Further, the lower tip portion of the blade 9 (FIG. 3B) has the largest gap between the tip portion of the lip shoulder portion 75 and the projecting edge 72, so that the lip shoulder portion 74 and the projecting edge 72 are in contact with each other. In order to make contact, it is more difficult to make contact than in the state of FIG. Therefore, the lip contact angle θ is the smallest. Further, as described above, the gap between the lip shoulder portion and the projecting edge 72 becomes gradually narrower from the lower tip portion to the upper tip portion in the longitudinal direction of the wiper, so that the lip contact angle θ becomes longer from the lower tip portion in the longitudinal direction. It becomes gradually smaller toward the upper tip.

Therefore, in a general window glass, it is possible to suppress the wiper judder generated at the lower tip portion and the unwiped portion of the water generated at the upper tip portion, and it is possible to wipe the wiper when it is raining.
The visibility of the 60 during operation can be improved.

Also, wiper 60 on the water-repellent window glass
When applying, the white film phenomenon that is likely to occur at the upper tip portion and the wiper judder phenomenon that is likely to occur at the lower tip portion are less likely to occur, and the visibility when the wiper 60 is operated in the rain is improved. Has the effect of being able to improve.

In the present embodiment, the upper end of the blade 80 (FIG. 3 (a)) is longer than the length of the connecting portion 73, so that the lip shoulder 74
And the protruding edge 72, the blade 80
The gap between the lip shoulder portion 74 and the projecting edge 72 gradually widens toward the bottom of the blade 80, and the length of the connecting portion 73 and the lip shoulder portion 74 at the lower tip portion of the blade 80 (FIG. 3B).
The gap between the protruding edge 72 and the projecting edge 72 is made equal, but as long as the gap between the lip shoulder and the projecting edge becomes wider from the upper side to the lower side of the blade, various blades can be used as shown in FIG. However, the same effect can be obtained.

Next, a third embodiment will be described with reference to FIG.

The wiper 5 shown in FIG. 5 supports the blade 7 with seven stays 8. In the first stay 8a of the wiper 5, the swing arm 6 is supported by the bolt 32 at the center of the stay 8a. When the swing arm 6 rotates, the blade 7 slides on the surface of the window glass 1 to wipe off water drops, dirt and the like on the surface of the window glass 1. Second and third stays 8b and 8c are supported on the left and right ends of the stay 8a by respective pivot bolts 32a and 32b. Further, at the left and right ends of the second stay 8b, the fourth and fifth stays 8d, 8d are attached by pivot bolts 32c, 32d.
8e each supported. Also, pivot bolts 32e and 32f are provided on the left and right end portions of the third stay 8c for the sixth and seventh bolts.
Stays 8f and 8g are supported.

Claws 31a to 31h are provided at both ends of the fourth to seventh stays 8d to 8g, and the blade 7 is held by these claws 31a to 31h. The wiper 5 has a claw 31h side (right side in the drawing) as an upper portion and a claw 31a side (left side in the drawing) as a lower portion.

The pivot bolt 32 will now be described.

The pivot bolts 32 at the six positions are fixed so that there is a difference in rattling when the stay 8 is swung.

Specifically, the rattling of the stay 8b is the stay 8c.
It should be smaller than the rattling of. Similarly, the rattling of the stay 8d is made smaller than the rattling of the stay 8e. Further, the rattling of the stay 8f is made smaller than that of the stay 8g.

Since the play of the stay 8 is changed in this way, the pressing force applied to the blade 7 during the wiper operation changes in the longitudinal direction of the blade 7.

Therefore, the claw 31 of the stay 8d during the wiper operation
The pressing force applied to the blade 7 portion held by a and b is larger than the pressing force applied to the blade 7 portion held by the claws 31c and d of the stay 8e. Similarly, the blade 7 held by the claws 31e and f of the stay 8f
The pressing force applied to the portion becomes larger than the pressing force applied to the blade 7 portion held by the claws 31g and h of the stay 8g.

Therefore, the pressing force applied to the blade 7 is strong in the lower portion (left side in the drawing) of the blade 7 in the longitudinal direction, and becomes weaker toward the upper portion (right side in the drawing).

Since such a pressing force is generated on the blade 7, when the wiper is operated, the lip contact angle θ becomes smaller toward the lower part of the blade 7 and becomes larger at the upper part of the blade 7.

Since the lip contact angle θ is increased from the lower portion to the upper portion in the longitudinal direction of the blade 7 as described above, in a general window glass, the wiper judder and the upper tip portion which are formed at the lower tip portion are formed. It is possible to suppress the unwiped portion of the generated water, and it is possible to improve the visibility during operation of the wiper during rain.

When applied to a water-repellent window glass, it is possible to prevent the white film phenomenon, which is likely to occur at the upper tip portion, and the wiper judder phenomenon, which is likely to occur at the lower tip portion, from occurring. There is an effect that the visibility when operating the can be improved.

[0050]

As described above, according to the present invention, since the lip contact angle θ is increased from the lower portion to the upper portion in the longitudinal direction of the wiper blade, the lower tip portion of a general window glass is used. It is possible to prevent unwiping of the wiper judder and the upper tip of the wiper from occurring, and it is possible to improve the visibility during operation of the wiper during rainfall.

When applied to a water-repellent window glass, it is possible to prevent the white film phenomenon that is likely to occur at the upper tip portion and the wiper judder phenomenon that is likely to occur at the lower tip portion from occurring, and to wipe the wiper when it rains. There is an effect that the visibility when operating the can be improved.

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment.

FIG. 2 is a sectional view of FIG.

FIG. 3 is a diagram showing a second embodiment.

FIG. 4 is a diagram showing a variation of the second embodiment.

FIG. 5 is a diagram showing a third embodiment.

FIG. 6 is a diagram showing a conventional wiper.

FIG. 7 is an enlarged view of the tip of the wiper blade.

[Explanation of symbols]

 1 ... Window glass 2,9,80 ... Wiper blade 8,40-45 ... Stay 13,16-18 ... Clamping edge 20-26,31,70 ... Claw 28 ... Neck part 30 ... Holding part 32 ... Pivot bolt 50 ~ 54 ... Pivot branch

Claims (2)

[Claims] 1. A wiping portion for wiping a wiping surface of a window glass, a holding portion, and a connecting portion for connecting the wiping portion and the holding portion are integrally formed, and the window glass is provided near the connecting portion of the wiping portion. The wiper blade made of an elastic material having a cross-sectional width in the wiping direction wider than the cross-sectional width in the wiping direction of the connecting portion, and supporting the holding portion, and having a predetermined gap from the connecting portion in the wiping direction. And a claw that limits the displacement of the connecting part in the wiping direction, and the gap between the connecting part and the claw is an inner peripheral side end for wiping the window glass surface in the longitudinal direction of the wiper blade. A wiper for a vehicle configured to be gradually smaller from a portion toward an outer peripheral side end portion. 2. A wiping portion for wiping a wiping surface of a window glass, a holding portion, and a connecting portion for connecting the wiping portion and the holding portion are integrally formed, and the window glass is provided near the connecting portion of the wiping portion. A wiper blade of an elastic body having a cross-sectional width in the wiping direction wider than the cross-sectional width in the wiping direction of the connecting portion, and a pawl supporting the holding portion, and the fixed portion consisting of the holding portion and the pawl A gap A between an end in the wiping direction and an end in the wiping direction of the wiping part, and a length B between the central part of the fixed part in the wiping direction and the central part of the wiping part in the wiping direction. A vehicle wiper configured such that the ratio A / B gradually decreases from the inner peripheral side end to wipe the window glass surface in the longitudinal direction of the wiper blade toward the outer peripheral side end.