JP5044250B2 - Wiper blade - Google Patents

Description

  The present invention relates to a wiper blade for wiping a windshield of a vehicle.

  For vehicles such as passenger cars, buses, trucks, etc., wipe off deposits such as rain, snow, insects, and muddy water splashed by vehicles traveling in front of the windshield, such as windshield and rear windshield. A wiper device for securing the driver's field of view is installed. This wiper device has a wiper arm that is swingably mounted on a vehicle body, and a wiper blade that is attached to the tip of the wiper arm. Is swung to wipe off the deposits attached to the window glass.

As such a wiper blade, for example, a wiper blade having a rubber holder that is swingably attached to the tip of the wiper arm, a rubber blade rubber that is held by the rubber holder, and a cover that is connected to the rubber holder is known. It has been. FIG. 8 is a view showing a conventional wiper blade 60, and FIG. 9 is a cross-sectional view taken along the line FF of FIG. Like the wiper blade 60 shown in FIGS. 8 and 9, the cover 61 is composed of a center cover portion 62 and a side cover portion 63, and both longitudinal ends of the blade rubber 64 are lifted from the wind glass when the vehicle is traveling. In order to prevent this, the connection protrusion 65 of the side cover portion 63 is rotatably inserted into the connection hole 67 of the rubber holder 66, and the base end portion 63 b of the side cover portion 63 is rotatably connected to the rubber holder 66. At the same time, the tip 63a of the side cover 63 protrudes from the longitudinal ends 66a of the rubber holder 66 to hold the blade rubber 64 so that the side cover 63 rotates according to the bending of the blade rubber 64. What has been proposed is proposed.
JP 2006-89043 A

  Incidentally, as shown in FIG. 9, the wiper blade 60 has a corner portion 68 between the top wall portion 61a and the side wall portion 61b of the cover 61, and this corner portion 68 serves as a barrier when the vehicle travels. Wind does not spread smoothly to the side, increasing wind resistance. As a result, there is a problem that the blade rubber 64 is not sufficiently adhered to the window glass and is likely to float. Here, it is conceivable that the corner portion 68 has an arc surface to reduce wind resistance.

  However, if the arc surface has the same radius of curvature along the longitudinal direction of the cover or rubber holder, the radius of curvature must be reduced along with the connecting portion between the cover and the rubber holder. Thus, if the radius of curvature of the arc surface is small, it is difficult to reduce the wind resistance even if the arc surface is formed, and it has not been possible to prevent lifting during vehicle travel.

  An object of the present invention is to provide a wiper blade that can prevent lifting when the vehicle is running.

The wiper blade of the present invention is a wiper blade for wiping a windshield of a vehicle, and includes a pair of holding portions at both ends in the longitudinal direction, and a wiper arm of the vehicle at a mounting portion provided at the center in the longitudinal direction. A rubber holder attached to the rubber holder and supported by two points on both ends of the rubber holder in the longitudinal direction by engaging with the pair of holding parts , and a pressing force from the wiper arm is applied via the attachment part a blade rubber is al, mounted along the longitudinal direction of the blade rubber, and an elastic deformable plate spring member in a direction perpendicular to the window glass, the both ends in the longitudinal direction of each of the rubber holder It is connected, and a pair of covers for covering the blade rubber is provided on the top wall portion of the rubber holder, the inclined wiping direction 1 And wind receiving surface, provided at one side wall portion of the rubber holder, a second wind receiving surface continuous with the first wind receiving surface through an arc surface, the first wind receiving surface to the rubber holder provided so as to be continued in, and a fin that generates a force wind blowing against the arcuate surface presses the commonplace SL blade rubber to the window glass, the arc surface of the both ends of the rubber holder than the radius of curvature, characterized in that to increase the radius of curvature of the arcuate surface at the intermediate portion between the said attachment portion both ends.

  The wiper blade of the present invention is provided on the top wall portion of the cover, and is provided on the first cover side wind receiving surface inclined in the wiping direction and one side wall portion of the cover, via the cover side arc surface. A second cover wind receiving surface continuous to the first cover side wind receiving surface, and the radius of curvature of the cover side arc surface at the connection portion of the cover with the rubber holder is larger than that of the connection portion. The radius of curvature of the cover-side arcuate surface on the cover front end side is increased.

  The wiper blade according to the present invention is characterized in that the radius of curvature of the arc surface at the tip of the rubber holder matches the radius of curvature of the cover-side arc surface at the connecting portion of the cover.

  According to the present invention, the wiper blade is provided with a pair of holding portions at both ends in the longitudinal direction, and is engaged with the rubber holder attached to the wiper arm of the vehicle at the attachment portion and the holding portion at the intermediate portion in the longitudinal direction. Blade rubber held at two points, a pair of covers connected to both ends of the rubber holder in the longitudinal direction and covering the blade rubber, and a first wind inclined on the wiping direction provided on the top wall of the rubber holder A receiving surface and a second wind receiving surface provided on one side wall portion of the rubber holder and connected to the first wind receiving surface via the arc surface, and from a radius of curvature of the arc surface at the tip of the rubber holder In addition, since the radius of curvature of the arc surface at the intermediate part between the mounting part and the tip part is increased, the arc surface does not become a barrier when the vehicle is running, and wind flows smoothly to the rear side of the vehicle, reducing wind resistance. It can be. As a result, the adhesiveness of the blade rubber to the window glass is increased, which makes it possible to prevent lifting during vehicle travel.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 is a perspective view showing a wiper blade according to a first embodiment of the present invention, FIGS. 2 (a) and 2 (b) are explanatory views showing details of the holding portion shown in FIG. 1, and FIG. 3 (a). FIGS. 4A to 4D are explanatory views showing changes in the shape of the blade rubber when the wiper blade shown in FIG. 1 is in contact with the window glass, and FIG. 4 is a perspective view showing details of the rubber holder and the cover shown in FIG. . Further, FIGS. 5 (a) is a sectional view taken along the line A-A of FIG. 1, (b) is a sectional view taken along the line C-C in FIG. 1, (c) is a cross section taken along the line B-B of FIG. 1 FIG.

  The wiper blade 10 wipes off deposits such as rain, snow, insects, and muddy water splashed by a vehicle traveling in front of the windshield 12 (hereinafter referred to as “wind glass”) of the vehicle 11. And mounted on the vehicle 11 in order to secure the driver's view.

  As shown in FIG. 1, the wiper blade 10 includes a rubber holder 15 that is swingably attached to the tip of a wiper arm 13 that is swingably supported by a vehicle, and a blade rubber 23 that is held by the rubber holder 15. A pair of covers 32 are connected to both ends of the rubber holder 15 in the longitudinal direction.

  As shown in FIG. 2 and FIG. 5A, the blade rubber 23 is formed in a bar shape having a uniform cross section in the longitudinal direction using natural rubber or synthetic rubber as a material, and has a rectangular head section 24 and a window glass. 12, and a neck portion 26 provided between the head portion 24 and the lip portion 25. The neck portion 26 is formed with a narrow width in the wiping direction with respect to the head portion 24 and the lip portion 25, so that the lip portion 25 can tilt in the wiping direction with respect to the head portion 24.

  Between the head part 24 and the neck part 26, a holding groove 27 is formed which opens on both side surfaces in the wiping direction and extends in the longitudinal direction. Further, mounting grooves 24a are formed on both side surfaces of the head portion 24 so as to extend in the longitudinal direction. And the leaf | plate spring member 30 is each mounted | worn in these mounting grooves 24a.

  The leaf spring member 30 is formed into a flat plate having a length similar to that of the blade rubber 23 by punching a plate material such as a steel plate, and is elastically deformable in a direction perpendicular to the wind glass 12. As a result, the blade rubber 23 to which the leaf spring member 30 is attached is elastically deformable in a direction perpendicular to the window glass 12 integrally with the leaf spring member 30, that is, a direction in which the degree of curvature is changed. In addition, the leaf spring member 30 is curved in a natural state in a direction in which the leaf spring member 30 can be elastically deformed more strongly than the curvature of the window glass 12, so that the blade rubber 23 to which the leaf spring member 30 is attached is also the window glass 12. It is curved more strongly than the wind glass 12 in a state away from the window.

  In the illustrated case, the leaf spring member 30 is formed of a steel plate. However, the present invention is not limited to this. For example, the leaf spring member 30 may be elastically deformable in a direction perpendicular to the window glass 12, such as a hard resin. That's fine.

  On the other hand, as shown in FIG. 2 and FIG. 5A, the rubber holder 15 has a top wall portion 15a extending in the longitudinal direction by a resin material and a pair of side walls extending from both side portions of the top wall portion 15a toward the wind glass 12. Part 15b, and the length of the part 15b is approximately half that of the blade rubber 23. The top wall portion 15a is provided with a first wind receiving surface 15c inclined in the wiping direction, and the side wall portion 15b on one side is provided with a second wind receiving surface 15d. An arc surface 16 is provided between the first wind receiving surface 15c and the second wind receiving surface 15d, and the first wind receiving surface 15c and the second wind receiving surface 15d are arcuate. It continues through the surface 16. Further, the fins 17 are integrally formed on the top wall portion 15a, and when the wind hits the fins 17, the blade rubber 23 is pressed against the wind glass 12 by the wind force so that the aerodynamic characteristics of the wiper blade 10 are improved. It has become. As shown in FIG. 1, an attachment portion 18 is fixed to a substantially central portion in the longitudinal direction of one side wall portion 15 b, and the rubber holder 15 is attached to the tip of the wiper arm 13 at the attachment portion 18. . The intermediate portion of the blade rubber 23 is disposed inside the rubber holder 15 and is covered with the rubber holder 15, and only the lip portion 25 is exposed to the outside.

  As shown in FIG. 1, a holding portion 19 is provided at one end in the longitudinal direction of the rubber holder 15 (on the side closer to the swing center of the wiper arm 13 when the wiper blade 10 is attached to the wiper arm 13). ing. As shown in FIG. 2A, the holding portion 19 includes a pair of holding claws 20 (only one side is shown in the figure, but the same holding claw is provided on the other side). The holding claws 20 are formed in the shape of a rectangular cross section projecting from the side wall portion 15 b in a direction perpendicular to the longitudinal direction of the blade rubber 23 and parallel to the wiping direction, and engage with the holding grooves 27. The blade rubber 23 is held. Further, the blade rubber 23 is provided with a pair of stopper portions 28, 28 that sandwich the holding claws 20 from the longitudinal direction, and the holding claws 20 are held against the blade rubber 23 by these stopper portions 28, 28. Movement in the direction along the groove 27 is restricted. That is, the blade rubber 23 is held by the rubber holder 15 in the holding portion 19 in a state where the blade rubber 23 is positioned in the longitudinal direction.

  Similarly, a holding portion 21 is provided at the other end of the rubber holder 15 in the longitudinal direction, and the holding portion 21 has a pair of holding portions each having a rectangular cross section as shown in FIG. Claws 22 (only one side is shown in the figure but similar holding claws are provided on the other side), and these holding claws 22 engage with holding grooves 27, thereby holding the blade rubber 23. Yes. Further, in the portion where the holding claw 22 is engaged, the blade rubber 23 is not provided with a stopper portion, and the holding claw 22 is movable along the holding groove 27. That is, the blade rubber 23 is held in the holding portion 21 so as to be movable in the axial direction with respect to the rubber holder 15.

  As described above, in the wiper blade 10, the pair of holding portions 19 and 21 are provided at both ends in the longitudinal direction of the rubber holder 15, and the blade rubber 23 is held at two points of the holding portions 19 and 21. . Therefore, when the pressing force from the wiper arm 13 is applied to the rubber holder 15 via the attachment portion 18, the pressing force is applied to the blade rubber 23 from two points at both ends of the rubber holder 15, that is, from the holding portions 19 and 21. . Thereby, the blade rubber 23 is brought into contact with the window glass 12 in an elastic manner.

  When the blade rubber 23 is not in contact with the wind glass 12, the wiper blade 10 has a larger curvature than the maximum curvature in the wiping range of the wind glass 12 as shown in FIG. Curved in the direction of closing towards the surface. When the wiper blade 10 is set on the wind glass 12 from this state, both longitudinal ends of the blade rubber 23 first come into contact with the glass surface. When the pressing force of the wiper arm 13 (indicated by an arrow in the figure) is applied to the blade rubber 23 via the rubber holder 15 with both ends of the blade rubber 23 in contact with the glass surface, as shown in FIG. The blade rubber 23 is deformed into an M shape so that the central portion in the longitudinal direction is in contact with the glass surface. At this time, since the blade rubber 23 is restricted from moving in the axial direction relative to the rubber holder 15 in the holding portion 19 and is allowed to move in the axial direction in the holding portion 21, the pressing force from the wiper arm 13 increases. Accordingly, the blade rubber 23 can be deformed along the glass surface. As shown in FIG. 3C, the blade rubber 23 is gradually deformed so as to be along the glass surface. When the blade rubber 23 is completely set on the glass surface, as shown in FIG. The wiping posture is such that the entire longitudinal direction comes into contact with the glass surface by the pressing force from 13. At this time, since the leaf spring member 30 is also elastically deformed into a shape along the glass surface in the same manner as the blade rubber 23, the pressing force of the wiper arm 13 applied to the rubber holder 15 via the attachment portion 18 is elastically deformed of the leaf spring member 30. The blade rubber 23 is dispersed in the longitudinal direction of the blade rubber 23, and the blade rubber 23 contacts the window glass 12 with a uniform distributed pressure in the longitudinal direction. Accordingly, the blade rubber 23 can be wiped in a state where the entire longitudinal direction is uniformly in contact with the wind glass 12, and good wiping performance can be exhibited.

As shown in FIG. 4, the cover 32 is formed separately from the rubber holder 15, and a connecting leg portion 37 is provided at a base end that becomes a connecting portion with the rubber holder 15. The holder 15 is connected to both ends in the longitudinal direction. The cover 3 2, as shown in FIG. 5 (b), are formed in cross-section U-shaped with a top wall 32a and a pair of side wall portions 32b of a resin material. The top wall portion 32a is provided with a first cover side wind receiving surface 32c inclined in the wiping direction, and a second cover side wind receiving surface 32d is provided on one side wall portion. A cover-side arc surface 33 is provided between the first cover-side wind receiving surface 32c and the second cover-side wind receiving surface 32d, and the first cover-side wind receiving surface 32c and the second cover-side wind receiving surface 32c The cover side wind receiving surface 32d is connected via the arc surface 16. The top wall 32a is integrally formed with fins 34 connected to the fins 17 of the rubber holder 15 so as to enhance its aerodynamic characteristics. In the present embodiment, the wiper blade 10 is provided with a pair of covers 32, but these covers 32 have substantially the same structure except that they are symmetrical.

  As shown in FIG. 1, one cover 32 is arranged side by side on the rubber holder 15 at one end portion in the longitudinal direction of the rubber holder 15, and the other cover 32 is disposed at the other end portion in the longitudinal direction of the rubber holder 15. These rubber holders 15 are arranged side by side. Thereby, the front side portions of the blade rubber 23 protruding from both sides of the rubber holder 15 are covered with the covers 32, respectively. That is, the blade rubber 23 is configured such that only a part of the lip 25 is exposed to the outside and the other part is entirely covered by the rubber holder 15 and the cover 32.

  As shown in FIG. 5 (c), the rubber holder 15 and the cover 32 are configured such that the rubber holder 15 and the connecting leg portion 37 on the cover 32 side are at the inner ends of the rubber holder 15 at both ends in the longitudinal direction of the rubber holder 15. The connecting leg receiving part 39 is arranged in the long hole 38 so as to engage with the outer surface of the connecting leg receiving part 39 on the side, and is connected to the connecting leg receiving part 39.

  As described above, when the pair of covers 32 are provided at both ends in the longitudinal direction of the rubber holder 15, the entire blade rubber 23 can be covered with the rubber holder 15 and the cover 32. Therefore, the leaf spring member 30 attached to the blade rubber 23 and the burrs generated when the blade rubber 23 is molded are hidden by the cover 32 so that they cannot be visually recognized from the outside, and the appearance of the wiper blade 10 can be improved.

By the way, as shown in FIG. 1 , in the longitudinal direction of the rubber holder 15 , there is an intermediate portion 14 (hereinafter also simply referred to as “intermediate portion”) between the attachment portion 18 and the tip portion 35. The tip portion 35 is a portion corresponding to both end portions in the longitudinal direction of the rubber holder 15 as shown in FIG. As shown in FIGS. 5A and 5C, the rubber holder 15 has a larger radius of curvature at the arc surface 16 at the intermediate portion 14 than at the arc surface 36 at the tip portion 35. That is, in the front end portion 35, the connecting leg portion 37 and the connecting receiving portion 39, which are members for connecting the rubber holder 15 and the cover 32, are present in the longitudinal direction, so the range of the radius of curvature of the arc surface is limited. . However, there is no structural restriction in providing the arc surface in the intermediate portion 14. Therefore, the radius of curvature of the arc surface 16 is increased in the intermediate portion 14 which is a range where the arc surface excluding the tip portion 35 is provided.

Similarly, as shown in FIG. 5 (b), the cover-side arcuate surface 33 on the tip end side 31 of the cover 32 (hereinafter also simply referred to as “tip end side”) is the cover 32, The radius of curvature is formed to be larger than the arc surface at the connecting portion. As shown in FIG. 1, the tip end side 31 is a portion closer to the end side opposite to the connecting portion with the rubber holder 15 in the longitudinal direction of the cover 32. The radius of curvature of the arc surface 33 on the cover 32 side at the connecting portion with the rubber holder 15 is the tip of the rubber holder 15 from the viewpoint of smoothly connecting the rubber holder 15 and the cover 32. 35, the radius of curvature of the circular arc surface 36 is matched. Further, as shown in FIGS. 5A and 5B, the curvature radius of the cover-side arcuate surface 33 is slightly smaller than the curvature radius of the arcuate surface 16. In addition, since it is the cover 32 and the cross-sectional shape of the connection part with the rubber holder 15 becomes the same shape as the cross-sectional shape of the front-end | tip part 35 of the rubber holder 15 shown in FIG.5 (c), illustration is abbreviate | omitted.

  As described above, in the wiper blade 10, the radius of curvature of the arc surface 16 in the intermediate portion 14 of the rubber holder 15 and the cover-side arc surface 33 on the tip end side 31 of the cover 32 is increased, so Wind resistance applied to the surface 16 and the cover-side arc surface 33 can be reduced. In other words, if the radius of curvature is reduced in accordance with the arc surface 36 of the tip 35 of the rubber holder 15, the wind strongly hits the arc surface when the vehicle 11 is traveling, and the amount of air hitting the fins 17 and 34 on the rear side of the vehicle 11 is reduced. Further, the pressing force of the blade rubber 23 against the window glass 12 is weakened and the adhesion is lowered. On the other hand, when the radius of curvature of the arc surface 16 in the intermediate portion 14 of the blade rubber 15 and the cover-side arc surface 33 on the tip end side 31 of the cover 32 is increased, the air volume hitting the fins 17 and 34 increases and the blade rubber is increased. 23 is strongly pressed by the wind glass 12, and adhesiveness increases. As a result, it is possible to prevent the vehicle 11 from being lifted during traveling.

  FIG. 6 is a partially cutaway front view showing a wiper blade 40 according to a second embodiment of the present invention. In addition, about the part which has the function similar to 1st Embodiment, the same symbol is attached | subjected and the detailed description is abbreviate | omitted.

  The wiper blade 40 is an example of a mode in which no cover is provided. As shown in FIG. 6, the wiper blade 40 is provided with a support block 41 that also serves as a mounting portion of a wiper arm (not shown in FIG. 6) at a substantially intermediate portion in the longitudinal direction of the rubber holder 45. A rod-shaped spring member 42 is fixed in the moving direction when the wiper blade 40 wipes the window glass (not shown in FIG. 6), that is, the wiping direction. The support block 41 is provided with a plurality of holding pieces 43 also called bridging members or elements, and these holding pieces 43 are connected to the rod-shaped spring member 42 at a predetermined interval.

  7A is a cross-sectional view taken along the line DD in FIG. 6, and FIG. 7B is a cross-sectional view taken along the line EE in FIG. As shown in FIG. 7, the holding piece 43 has a base portion 43a and a pair of side portions 43b and 43c that are substantially perpendicular to the base portion 43a, and each of the rod-like spring members 42 has one side portion 43b or the other side. The side part 43c is penetrated. Further, a holding claw 43d as a holding portion is formed on each side portion 43b, 43c of each holding piece 43, and the blade rubber 23 is held by each holding piece 43 by this holding claw 43d. Yes. The rubber holder 45 is provided with a stopper 49 as means for restricting excessive deformation.

  On the other hand, as shown in FIG. 7A, the rubber holder 45 has substantially the same configuration as that of the first embodiment. That is, the first wind receiving surface 45c is provided with the top wall portion 45a provided to be inclined in the wiping direction and the side wall portion 45b provided with the second wind receiving surface 45d on one side. The surface 45c and the second wind receiving surface 15d are connected via an arc surface 46. 7A and 7B, the radius of curvature of the arc surface 46 in the intermediate portion 44 between the support block 41 and the tip portion 47 is larger than that of the arc surface 48 in the tip portion 47.

  As described above, in the wiper blade 40, by increasing the radius of curvature of the circular arc surface at the intermediate portion 44, as with the wiper blade 10, it is possible to prevent the vehicle 11 from being lifted during traveling.

  The present invention is not limited to the first embodiment and the second embodiment described above, and various modifications can be made without departing from the scope of the present invention. For example, in the first embodiment, the mounting portion 18 is disposed on the front side of the vehicle, but the mounting portion 18 is disposed on the rear side of the vehicle, and the mounting portion 18 is provided in the first embodiment. Also in the portion that is formed, an arc surface having a larger radius of curvature than the arc surface 36 formed at the tip portion 35 may be provided. Similarly, in the second embodiment, the support block 41 is arranged on the vehicle rear side, and in the second embodiment, the tip block 47 is formed at the portion where the support block 41 is provided. An arc surface having a larger radius of curvature than the arc surface 48 may be provided.

  In the first embodiment, in order to further reduce the wind resistance, the radius of curvature of the cover-side arc surface 33 on the tip end side 31 is also increased in the cover 32. The radius of curvature may be the same along the longitudinal direction. Furthermore, in the first embodiment, the radius of curvature of the arc surface is made to coincide at the connecting portion between the tip 35 of the rubber holder 15 and the rubber holder 15 of the cover 32, but the rubber holder 15 and the cover 32 are the same. Can be connected to each other at the connecting portion between the tip 35 of the rubber holder 15 and the rubber holder 15 of the cover 32, an arc surface having a different radius of curvature may be provided. Furthermore, in the first embodiment, the cover-side arc surface 33 on the tip end side 31 of the cover 32 has a slightly smaller radius of curvature than the arc surface 16 on the intermediate portion 14 of the rubber holder 15. The radius of curvature of the arcuate surface 16 may be the same or larger.

  Furthermore, the present invention can be applied to wiper blades used in various types of wiper apparatuses such as a tandem type and a counter wiping type.

It is a perspective view which shows the wiper blade which is the 1st Embodiment of this invention. (A), (b) is explanatory drawing which shows the detail of the holding | maintenance part shown in FIG. 1, respectively. (A)-(d) is explanatory drawing which shows the change of the shape of a blade rubber when the wiper blade shown in FIG. 1, respectively contacts window glass. It is a perspective view which shows the detail of the rubber holder and cover shown in FIG. (A) is sectional drawing which follows the AA line of FIG. 1, (b) is sectional drawing which follows the CC line of FIG. 1, (c) is sectional drawing which follows the BB line of FIG. It is a partially notched front view which shows the wiper blade which is the 2nd Embodiment of this invention. (A) is sectional drawing which follows the DD line of FIG. 6, (b) is sectional drawing which follows the EE line of FIG. It is a figure which shows the conventional wiper blade. It is sectional drawing which follows the FF line | wire of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Wiper blade 11 Vehicle 12 Wind glass 13 Wiper arm 14 The intermediate part 15 of a rubber holder attachment part and a front-end | tip part Rubber holder 15a Top wall part 15b Side wall part 15c 1st wind receiving surface 15d 2nd wind receiving surface 16 Arc surface 18 Mounting portion 23 Blade rubber 31 Compared to the connecting portion of the cover to the rubber holder, the tip end side 32 cover 32a top wall portion 32b side wall portion 32c first cover side wind receiving surface 32d second cover side wind receiving surface 33 Cover side arc surface 35 Rubber holder tip 36 Arc surface 40 Wiper blade 41 Support block (mounting part)
44 Rubber holder support block and intermediate part 45 Rubber holder 46 Arc surface 47 Rubber holder tip 48 Arc surface

Claims (3)

A wiper blade for wiping the windshield of a vehicle,
A rubber holder provided with a pair of holding portions at both ends in the longitudinal direction, and attached to the wiper arm of the vehicle in an attachment portion provided at the center in the longitudinal direction ;
A blade rubber is supported at two points of the longitudinal ends, and, pressing force from the wiper arm is found added via the attachment portion of the rubber holder engaged with the pair of holding portions,
A leaf spring member attached along the longitudinal direction of the blade rubber and elastically deformable in a direction perpendicular to the window glass;
A pair of covers each connected to both ends of the rubber holder in the longitudinal direction and covering the blade rubber;
A first wind receiving surface provided on the top wall of the rubber holder and inclined in the wiping direction;
A second wind receiving surface provided on one side wall portion of the rubber holder and connected to the first wind receiving surface via an arc surface ;
The rubber holder is provided so as to be continuous with the first wind receiving surface, and includes a fin that generates a force that hits the arc surface and hits the blade rubber against the wind glass .
Wiper blade, characterized in that than the radius of curvature of the arcuate surface at the both ends of the rubber holder and increasing the curvature radius of the circular arc surface at the intermediate portion between the said attachment portion both ends. The wiper blade according to claim 1 ,
A first cover-side wind receiving surface provided on the top wall portion of the cover and inclined in the wiping direction;
A second cover wind receiving surface provided on one side wall portion of the cover and connected to the first cover side wind receiving surface via a cover side arc surface;
A wiper characterized in that the radius of curvature of the cover-side arcuate surface on the tip side of the cover is larger than the radius of curvature of the cover-side arcuate surface at the connecting portion of the cover with the rubber holder. blade. The wiper blade according to claim 2,
The wiper blade according to claim 1, wherein a radius of curvature of the arc surface at the both end portions of the rubber holder and a radius of curvature of the cover-side arc surface at the connecting portion of the cover are matched .

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