WO2010026967A1

WO2010026967A1 - Wiper blade and vehicle wiper device

Info

Publication number: WO2010026967A1
Application number: PCT/JP2009/065265
Authority: WO
Inventors: 将藤原; 健一井本; 司荻野
Original assignee: 株式会社ミツバ
Priority date: 2008-09-04
Filing date: 2009-09-01
Publication date: 2010-03-11

Abstract

The distance between blade rubber (32) and an inner surface (31c1) of a rear wall (31c) of a rubber holder (31) is determined such that, from opposite ends longitudinally of the rubber holder (31) toward the center thereof, the distance gradually becomes greater than the distance between the blade rubber (32) and the inner surface (31b1) of a front wall (31b) of rubber holder (31). Also, the distance between the blade rubber and the inner surface of a rear wall of each of a pair of covers connected to the opposite ends longitudinally of the rubber holder (31) is determined such that, from opposite ends longitudinally of the cover toward the center thereof, the distance gradually becomes greater than the distance between the blade rubber and the inner surface of the front wall. The construction allows relative wind to easily flow between the rubber holder (31) and the blade rubber (32) and between the covers and the blade rubber (32).

Description

Wiper blade and wiper device for vehicle

The present invention relates to a wiper blade and a vehicle wiper device that are attached to the tip of a wiper arm and wipe the windshield of a vehicle.

A vehicle such as an automobile is provided with a wiper device for wiping off deposits such as rainwater adhering to the wind glass (wind shield glass). Such a wiper device includes a wiper arm that is swingably supported by a vehicle body, and a wiper blade is attached to the tip of the wiper arm.

The wiper blade is provided with a rubber holder having holding claws at both ends in the longitudinal direction and a blade rubber which is held by the rubber holder by engaging with the holding claws, and comes into contact with the wind glass at the blade rubber portion. ing. Also, covers are connected to both ends of the rubber holder in the longitudinal direction, and these covers cover the tip side portion of the blade rubber protruding from the rubber holder. Then, with the blade rubber in contact with the window glass, the wiper arm is driven to swing within a predetermined angle range by the wiper motor, so that the wiper blade swings on the window glass and the glass surface is wiped off. It has become so.

Since such wiper blades receive traveling wind when the vehicle travels, when the vehicle travels at a high speed, the lift and drag received from the traveling wind may increase, and the wiping performance may decrease.

For this reason, for example, in the wiper blade disclosed in Patent Document 1, a fin-shaped cover member is attached to the rubber holder, and the wind force is applied to the wiper blade toward the wind glass, that is, a down force is generated by receiving the traveling wind with the cover member. Thus, the wipeability of the wiper blade when the vehicle is running is improved.

JP 2006-232078 A

However, in the wiper blade disclosed in Patent Document 1, the traveling wind that flows on the upper side of the wiper blade along the cover body generates a vortex on the back side of the wiper blade, and this vortex causes negative pressure on the back side of the wiper blade. Will occur. For this reason, the wiper blade that has been reversed at the upper reversal position draws rainwater or the like swept out of the wiping range into the wiping range again due to the negative pressure, causing a water draining phenomenon, and the wiping property may be reduced. .

An object of the present invention is to improve the wiping performance of the wiper blade during traveling of the vehicle by suppressing the water drawing phenomenon after the reversing operation.

The wiper blade of the present invention is a wiper blade that is attached to the tip of a wiper arm and wipes the windshield of a vehicle, and has a holding claw at both ends in the longitudinal direction, and is a rubber that is attached to the wiper arm at the center in the longitudinal direction A holder and a blade rubber that engages with the holding claw and is held by the rubber holder, and a middle portion in a longitudinal direction is covered by the rubber holder and contacts the window glass, and the rubber holder has a ceiling wall And a front wall disposed on the vehicle front side with respect to the ceiling wall, and a rear wall disposed on the vehicle rear side with respect to the ceiling wall, and an interval between the inner surface of the rear wall and the blade rubber is The distance between the inner surface of the front wall and the blade rubber gradually increases from both ends in the longitudinal direction of the rubber holder toward the center. And features.

In the wiper blade according to the present invention, the distance between the lower end of the rear wall and the window glass is increased from both longitudinal ends of the rubber holder toward the center with respect to the distance between the lower end of the front wall and the window glass. It is characterized by gradually increasing.

The wiper blade of the present invention is a wiper blade that is attached to the tip of a wiper arm and wipes the windshield of a vehicle, and has a holding claw at both ends in the longitudinal direction, and is a rubber that is attached to the wiper arm at the center in the longitudinal direction A holder, a blade rubber that engages with the holding claw and is held by the rubber holder, the middle portion of the longitudinal direction is covered by the rubber holder and contacts the window glass, and both ends of the rubber holder in the longitudinal direction And a pair of covers that cover the tip side portion of the blade rubber protruding from the rubber holder, and the rubber holder and the cover are on the vehicle front side with respect to the ceiling wall and the ceiling wall, respectively. A rear wall disposed on the vehicle rear side with respect to the top wall, and an inner surface of the rear wall The distance between the blade rubber, characterized in that the gradually wider toward the central portion from the longitudinal ends of the rubber holder and the cover with respect to the spacing between the blade rubber and the inner surface of the front wall.

In the wiper blade of the present invention, the distance between the lower end of the rear wall and the window glass is from the both ends in the longitudinal direction of the rubber holder or the cover with respect to the distance between the lower end of the front wall and the window glass. It is characterized by gradually increasing as it goes.

A wiper device for a vehicle according to the present invention includes a blade rubber that slides on a wiping surface, a wiper blade that includes the cover member that holds the blade rubber and covers the blade rubber, and a distal end portion that is the center in the longitudinal direction of the wiper blade A wiper device for a vehicle having a wiper arm attached to a vehicle body and swingably attached to a vehicle body, wherein the cover member includes a front wall portion provided on the vehicle front side of the blade rubber, and the blade rubber. A top wall portion provided with a fin for urging the wiper blade toward the wiping surface side by connecting a rear wall portion provided on the vehicle rear side, the front wall portion and the rear wall portion, and receiving traveling wind And an opening that opens to the wiping surface side, and a portion of the traveling wind that is formed in the top wall portion through the opening to the rear of the wiper blade. And having a through hole for guiding the side.

In the vehicle wiper device of the present invention, at least one of the through holes is formed between a longitudinal center portion of the wiper blade and one longitudinal end portion of the wiper blade on the base end side of the wiper arm. Features.

In the vehicle wiper device according to the present invention, the rear wall portion is directed to the wiping surface side at least between a longitudinal center portion of the wiper blade and a longitudinal end portion of the wiper blade on the base end side of the wiper arm. Accordingly, it is formed so as to be inclined in a direction away from the blade rubber.

According to the present invention, the traveling wind can easily flow between the blade rubber and the rubber holder, and the vortex generated by the traveling wind flowing on the upper side of the rubber holder by the traveling wind can be reduced. It is possible to improve the wiping performance of the wiper blade when the vehicle travels by suppressing the water-drawing phenomenon caused by the negative pressure.

Further, according to the present invention, in the wiper blade in which the cover is connected to both end portions in the longitudinal direction of the rubber holder, the traveling wind is also generated between the blade rubber and the cover in addition to between the blade rubber and the rubber holder. Therefore, it is possible to reduce the generation of negative pressure due to the vortex in the entire range in the longitudinal direction of the wiper blade and to improve the wipeability of the wiper blade.

According to the present invention, a through hole is formed in the top wall portion of the cover member, and a part of the traveling wind is actively guided to the back side (vehicle rear side) of the wiper blade through the through hole and the opening. Thus, the traveling wind guided to the back side of the wiper blade suppresses the generation of backside negative pressure due to the traveling wind flowing upward along the fins. Therefore, for example, when the wiper blade is turned upside down, rainwater removed to the outside of the wiping area can be prevented from being drawn into the wiping area by the backside negative pressure (watering). Further, since the traveling wind that has flowed into the cover member flows out to the back side of the wiper blade and flows along the inner surface of the rear wall portion in the longitudinal direction, it is substantially uniform over the entire longitudinal direction of the wiper blade. In addition, the traveling wind can flow out to the back side of the wiper blade, and the occurrence of negative pressure on the back side can be reliably prevented over the entire longitudinal direction of the wiper blade.

1 is a perspective view showing a vehicle wiper device including a wiper blade according to an embodiment of the present invention. It is a perspective view which shows the state which removed one cover of the wiper blade shown in FIG. FIG. 3 is a sectional view taken along line AA in FIG. 2. (A) is a front view of the wiper blade shown in FIG. 2, and (b) is a rear view of the wiper blade shown in FIG. (A) is a sectional view taken along line AA in FIG. 1, (b) is a sectional view taken along line BB in FIG. 1, and (c) is a sectional view taken along line CC in FIG. FIG. FIG. 2 is a cross-sectional view illustrating a state of traveling wind received by the wiper blade illustrated in FIG. 1 when the vehicle is traveling. (A), (b) is a perspective view which shows the modification of the blade rubber shown in FIG. 2, respectively. It is a modification of the blade rubber shown in FIG. It is sectional drawing of the cover part of the wiper blade provided with the blade rubber shown in FIG. It is a perspective view which shows the wiper apparatus for vehicles which is one embodiment of this invention. It is the schematic which shows operation | movement of the wiper apparatus for vehicles. It is sectional drawing which follows the AA line in FIG. It is explanatory drawing which shows the flow of the travel wind which a wiper blade receives at the time of vehicle travel. It is explanatory drawing which shows the flow of the driving | running | working wind which flowed in in the rubber holder. It is a perspective view which shows the wiper apparatus for vehicles which is other embodiment of this invention.

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

FIG. 1 is a perspective view showing a vehicle wiper device provided with a wiper blade according to an embodiment of the present invention. This vehicle wiper device 11 (hereinafter referred to as a wiper device 11) is attached to a vehicle 12 such as an automobile. It is provided and wipes the wind glass (wind shield glass) 13 of the vehicle 12, and has a wiper arm 14 and a wiper blade 15 attached to the tip of the wiper arm 14.

The wiper arm 14 has an aluminum die-cast arm head 16, and the arm head 16 is fixed at a base end thereof to a pivot shaft (wiper shaft) 18 that is swingably provided on the vehicle 12 by a nut 17. . The pivot shaft 18 is connected to a wiper motor (not shown) mounted on the vehicle 12 via a link mechanism (not shown), and is driven by the wiper motor to swing within a predetermined angle range.

A retainer 19 formed in a substantially U-shaped cross section with a steel plate or the like is connected to the tip of the arm head 16 by a connecting shaft 21 so as to be rotatable toward and away from the window glass 13. An arm stay 22 is fixed to the tip of 19 by caulking. A spring (not shown) for energizing the retainer 19 in the direction toward the wind glass 13 with the connecting shaft 21 as an axis is accommodated inside the retainer 19, and the wiper arm 14 causes the wiper blade 14 to be wiped by the energizing force of the spring. A predetermined pressing force is applied to 15.

2 is a perspective view showing a state where one cover of the wiper blade shown in FIG. 1 is removed, and FIG. 3 is a cross-sectional view taken along the line AA in FIG.

The wiper blade 15 includes a rubber holder 31, a blade rubber 32, and a pair of covers 33. The wiper blade 15 is attached to the tip of the wiper arm 14 at a connecting portion 34 provided at the center in the longitudinal direction of the rubber holder 31. In FIG. 3, the window glass 13 is brought into contact.

As shown in FIGS. 2 and 3, the rubber holder 31 includes a top wall 31 a facing the blade rubber 32 on the side opposite to the wind glass 13, and a wiper blade 15 attached to the wiper arm 14. A front wall 31b positioned on the vehicle front side with respect to the top wall 31a when in the lower inverted position, and a rear wall positioned on the vehicle rear side with respect to the ceiling wall 31a when the wiper blade 15 is in the lower inverted position. 31c, and is formed in a cover shape having a substantially U-shaped cross section and having a length approximately half that of the blade rubber 32. Further, at both ends in the longitudinal direction of the rubber holder 31, there are provided a pair of holding claws 35 that protrude in directions facing each other from the inner surface 31b1 of the front wall 31b and the inner surface 31c1 of the rear wall 31c.

The blade rubber 32 is made of a rubber material and is formed in a long bar shape having a uniform cross section in the longitudinal direction, which includes a head portion 32a and a lip portion 32b. Between the head portion 32a and the lip portion 32b, the blade rubber 32 is formed. A holding groove 32c that opens toward both sides in the wiping direction and extends along the longitudinal direction is provided. The blade rubber 32 is held at two points by the rubber holder 31 by engaging these holding grooves 32 c with the holding claws 35 of the rubber holder 31, and the intermediate portion in the longitudinal direction is covered by the rubber holder 31. It has become.

Mounting grooves 32d extending along the longitudinal direction are provided on both side portions of the blade rubber 32 facing the wiping direction of the head portion 32a, and a vertebra (plate spring) 36 is mounted on each of the mounting grooves 32d. . These vertebras 36 are formed by a plate material such as a steel plate so as to be elastically deformable in a direction in which the window glass 13 approaches and separates from each other, and both end portions in the longitudinal direction have a predetermined direction in the direction closer to the wind glass 13 than the central portion in the longitudinal direction. When the blade rubber 32 is curved with a curvature and the blade rubber 32 is not in contact with the window glass 13, the blade rubber 32 is curved together with the vertebra 36.

The blade rubber 32 comes into contact with the wind glass 13 at the lip portion 32b. When the blade rubber 32 comes into contact with the wind glass 13 and a pressing force from the wiper arm 14 is applied to the wiper blade 15, each vertical bra 36 is The blade rubber 32 is elastically deformed in the direction along the wind glass 13, and the pressing force from the wiper arm 14 is uniformly applied to the entire longitudinal direction by the elastic deformation of the vertical bra 36. Contact.

As shown in FIG. 2, the pair of covers 33 are arranged opposite to the blade rubber 32 on the opposite side of the window glass 13 and adjacent to the top wall 31 a of the rubber holder 31, similarly to the rubber holder 31. When the wiper blade 15 is in the lower inverted position, the front wall 33b is located on the vehicle front side with respect to the ceiling wall 33a when the wiper blade 15 is in the lower inverted position. On the other hand, it is formed in a substantially U-shaped cross section having a rear wall 33c located on the vehicle rear side, and is connected to both ends of the rubber holder 31 in the longitudinal direction, respectively, from the rubber holder 31 of the blade rubber 32 A portion on the tip side protruding in the longitudinal direction is covered. Note that a pair of cover locking claws 37 projecting in directions facing each other from the inner surface 33b1 of the front wall 33b and the inner surface 33c1 of the rear wall 33c are provided at the front end portion of each cover 33, respectively.

In order to improve the aerodynamic characteristics of the wiper blade 15 during traveling of the vehicle 12 and prevent the wiper blade 15 from being lifted off the window glass 13, the rubber holder 31 is provided with a holder-side fin 41, and the cover 33 is provided with each Cover side fins 42 are provided.

The holder-side fins 41 provided in the rubber holder 31 are formed extending in the longitudinal direction across the connecting portion 34 at a portion near the rear wall 31 c of the top wall 31 a of the rubber holder 31, and are provided in the cover 33. The cover-side fins 42 are formed to extend over the entire length in the portion of the cover 33 near the rear wall 33c of the top wall 33a. These

fins

41 and 42 are inclined in a direction gradually moving away from the

top walls

31a and 33a from the

front walls

31b and 33b toward the

rear walls

31c and 33c, respectively. The wind that flows above 15 is bounced upward to cause the wiper blade 15 to press against the wind glass 13, that is, to generate a down force. Thereby, the wiping property of the wiper blade 15 when the vehicle 12 is traveling is enhanced.

4 (a) is a front view of the wiper blade shown in FIG. 2, and FIG. 4 (b) is a rear view of the wiper blade shown in FIG.

In the wiper blade 15, holder-

side cutout portions

51 and 52 are provided on the front wall 31 b and the rear wall 31 c of the rubber holder 31, respectively, so that the vehicle 12 can be moved between the rubber holder 31 and the blade rubber 32. The traveling wind is made easy to pass, and the vortex generated on the back side of the rear wall 31c by the traveling wind that has passed through the upper side (upper side) of the wiper blade 15 is reduced, so that the wipeability of the wiper blade 15 is improved.

As shown in FIG. 4 (a), the holder-side notch 51 provided on the front wall 31b of the rubber holder 31 is a holding claw provided between both longitudinal ends of the front wall 31b, that is, at both longitudinal ends. 35 is formed in a shape that is cut out from the lower end (the end on the side facing the wind glass 13) side toward the top wall 31a, and the opening shape is such that the lower end 31b2 of the front wall 31b is The rubber holder 31 is formed so as to be gradually separated from the window glass 13 as it goes from both ends in the longitudinal direction toward the center.

On the other hand, as shown in FIG. 4B, the holder-side cutouts 52 provided on the rear wall 31c of the rubber holder 31 are provided between both longitudinal ends of the rear wall 31c, that is, both longitudinal ends. The portion between the holding claws 35 is formed in a shape that is cut out from the lower end (the end on the side facing the window glass) side toward the top wall 31a, and the opening shape is the lower end 31c2 of the rear wall 31c. Is formed so as to be gradually separated from the window glass 13 as it goes from both ends in the longitudinal direction of the rubber holder 31 toward the center.

Similarly, in the wiper blade 15, the cover

side cutout portions

53 and 54 are provided on the front wall 33 b and the rear wall 33 c of each cover 33 connected to both ends in the longitudinal direction of the rubber holder 31. 12, it is easy to allow the traveling wind to pass between the cover 33 and the blade rubber 32, and the vortex generated on the back side of the rear wall 33 c by the traveling wind that has passed over the upper side (upper side) of the wiper blade 15 is reduced. The wiping property of the wiper blade 15 is improved.

As shown in FIG. 4A, the cover-side notch 53 provided on the front wall 33b of the cover 33 has a portion between both ends in the longitudinal direction of the front wall 33b at the lower end (opposite the window glass 13). The opening is formed so that the lower end 33b2 of the front wall 33b is directed from the both longitudinal ends of the cover 33 toward the central portion. It is formed so as to be gradually separated from the wind glass 13.

On the other hand, as shown in FIG. 4B, the cover-side cutout portion 54 provided on the rear wall 33c of the cover 33 has a portion between both ends in the longitudinal direction of the rear wall 33c at the lower end (opposite the window glass). The opening is formed so that the lower end 33c2 of the rear wall 33c extends from both ends in the longitudinal direction of the cover 33 toward the center. Therefore, it is formed so as to be gradually separated from the window glass 13.

5A is a cross-sectional view taken along line AA in FIG. 1, FIG. 5B is a cross-sectional view taken along line BB in FIG. 1, and FIG. It is sectional drawing which follows the -C line.

In this wiper blade 15, as shown in FIGS. 5A and 5B, the distance SH1 between the lower end 31c2 of the rear wall 31c of the rubber holder 31 and the window glass 13 is set to the lower end 31b2 of the front wall 31b and the window glass 13. The distance SH3 between the inner surface 31c1 of the rear wall 31c and the blade rubber 32 is made larger gradually from the both ends in the longitudinal direction of the rubber holder 31 toward the center. The distance SH4 between the inner surface 31b1 of the front wall 31b and the blade rubber 32 is gradually increased from both longitudinal ends of the rubber holder 31 toward the center. Further, the front wall 31b and the rear wall 31c of the rubber holder 31 are provided with holder-

side notches

51 and 52, respectively, so that the lower end 31b2 of the front wall 31b is at the center of the blade rubber 32 at a substantially central portion in the longitudinal direction. The lower end 31c2 of the rear wall 31c is set above the head portion 32a of the blade rubber 32 (in the direction away from the wind glass 13). As a result, when the vehicle 12 is traveling, the traveling wind that has entered between the rubber holder 31 and the blade rubber 32 from the front wall 31b side is efficiently passed between the rubber holder 31 and the blade rubber 32. The wiper blade 15 can be made to flow rearward.

Similarly, in the wiper blade 15, as shown in FIG. 5C, the distance SC1 between the lower end 33c2 of the rear wall 33c of the cover 33 and the window glass 13 is set to the distance between the lower end 33b2 of the front wall 33b and the window glass 13. By forming the cover 33 so as to gradually increase from both longitudinal ends of the cover 33 toward the center, the distance SC3 between the inner surface 33c1 of the rear wall 33c and the blade rubber 32 is set to the front wall 33b. The distance SC4 between the inner surface 33b1 and the blade rubber 32 is gradually increased from both ends in the longitudinal direction of the cover 33 toward the center. Further, the front wall 33b and the rear wall 33c of the cover 33 are provided with cover-

side cutout portions

53 and 54, respectively, so that the lower end 33b2 of the front wall 33b and the lower end of the rear wall 31c are substantially at the center in the longitudinal direction. 31c2 is set to have substantially the same height as the head portion 32a of the blade rubber 32, respectively. Thus, when the vehicle 12 is traveling, the wind that has entered between the cover 33 and the blade rubber 32 from the front wall 33 b side is efficiently passed through the gap between the cover 33 and the blade rubber 32. 15 can flow to the rear side.

Further, in the wiper blade 15, as shown in FIG. 3, the head portion 32a of the blade rubber 32 has a surface facing away from the window glass 13, that is, a top surface 32a1 and both side surfaces 32a2 facing the wiping direction. In the meantime, the head portion 32a is chamfered, so that a pair of inclined surfaces 32a3 connecting them is provided over the entire range in the longitudinal direction. These inclined surfaces 32a3 gradually incline away from the lip portion 32b, that is, the wind glass 13, as they move from the side surfaces 32a2 to the top surface 32a1, thereby causing the head portion 32a of the blade rubber 32 to move in the wiping direction. The center part is formed in a shape protruding to the opposite side of the lip part 32b.

As described above, the both side surfaces 32a2 of the head portion 32a of the blade rubber 32 are chamfered to form a convex shape having a pair of inclined surfaces 32a3. Therefore, the

front walls

31b and 33b of the rubber holder 31 and the cover 33 are formed. Further, the distances SH3, SH4, SC3, and SC4 between the inner surfaces 31b1, 31c1, 33b1, and 33c1 of the

rear walls

31c and 33c and the blade rubber 32 are increased so that the space between the rubber holder 31 and the blade rubber 32 and the cover 33 and the blade rubber are increased. It is possible to make the traveling wind easily flow between

FIG. 6 is a cross-sectional view showing a state of running wind received by the wiper blade shown in FIG. 1 when the vehicle is running.

With this configuration, the wiper blade 15 can facilitate the flow of traveling air between the rubber holder 31 and the blade rubber 32 when the vehicle 12 is traveling, and in particular, by providing the connecting portion 34. It is possible to make it easier for the traveling wind to flow at the center portion in the longitudinal direction of the rubber holder 31 where vortex is likely to occur.

Thus, as shown in FIG. 6, the traveling wind that has flowed to the back side of the rear wall 31 c via the upper side of the rubber holder 31 passes between the rubber holder 31 and the blade rubber 32 below the rubber holder 31. Therefore, the traveling wind that flows on the upper side of the rubber holder 31 can be prevented from generating vortices on the back side of the rear wall 31c.

As in the case of the rubber holder 31, each cover 33 also travels between the cover 33 and the blade rubber 32 using the traveling wind that has flowed to the back side of the rear wall 33 c via the upper side of the cover 33. It can flow to the vehicle rear side together with the wind, and the generation of vortex to the back side of the rear wall 33c due to the traveling wind can be suppressed.

As described above, in the wiper blade 15, the traveling wind can easily flow between the rubber holder 31 and the blade rubber 32. Therefore, the vortex generated by the traveling wind that has flowed above the rubber holder 31 due to the traveling wind is generated. Can be reduced. Further, since the traveling wind can easily flow between the rubber holder 31 and the blade rubber 32 as well as between the pair of covers 33 and the blade rubber 32, the traveling wind has caused the traveling wind to flow above the cover 33. It is possible to reduce vortices generated by the traveling wind. That is, it is possible to suppress the generation of vortex, that is, negative pressure on the downstream side of the wiper blade 15, that is, the back side, in the entire longitudinal range of the wiper blade 15. Therefore, it is possible to improve the wiping performance of the wiper blade 15 during travel of the vehicle 12 by suppressing the water pulling phenomenon that the wiper blade 15 generates after the wiper blade 15 is reversed.

FIGS. 7A and 7B are perspective views showing modifications of the blade rubber shown in FIG.

In the case shown in FIG. 2, the head portion 32a of the blade rubber 32 is provided with a pair of inclined surfaces 32a3 that are continuous with the top surface 32a1 and both side surfaces 32a2 over the entire range in the longitudinal direction. Not limited to this, as shown in FIG. 7A, the portions (two places) of the blade rubber 32 that engage with the holding claws 35 of the rubber holder 31 may be formed in a rectangular cross section where the inclined surface 32a3 is not formed. Good. Thereby, the traveling wind can easily flow between the rubber holder 31 and the blade rubber 32 while the blade rubber 32 is securely held by the rubber holder 31 by the holding claws 35 provided in the rubber holder 31.

Further, as shown in FIG. 7B, the pair of inclined surfaces 32a3 is formed only in a half range in the longitudinal direction from the middle position in the longitudinal direction of the blade rubber 32 to the tip portion nearer to the pivot shaft 18. You may do it. Thereby, by wiping with the wiper arm 14, the wiping performance of the wiper blade 15 in the range from the connecting portion 34 having a small effect of improving the wiping performance by the

fins

41, 42 to the tip portion closer to the pivot shaft 18 can be improved. .

FIG. 8 is a modification of the blade rubber shown in FIG. 2, and FIG. 9 is a cross-sectional view of the cover portion of the wiper blade provided with the blade rubber shown in FIG.

In the blade rubber 32 shown in FIG. 2, as shown in detail in FIG. 3, by providing a pair of inclined surfaces 32 a 3 on the head portion 32 a of the blade rubber 32, the

front walls

31 b and 33 b of the rubber holder 31 and the cover 33 are provided. The distance from the inner surfaces 31b1, 31c1, 33b1, 33c1 of the

rear walls

31c, 33c to the blade rubber 32 is enlarged, and traveling wind flows between the rubber holder 31 and the blade rubber 32 or between the cover 33 and the blade rubber 32. I try to make it easier.

On the other hand, in the blade rubber 32 shown in FIG. 8 and FIG. 9, notches 61 are formed in both corner portions formed by the top surface 32a1 and both side surfaces 32a2 of the head portion 32a of the blade rubber 32 in place of the inclined surfaces 32a3. The notches 61 are provided to increase the distance between the rubber holder 31 and the inner surfaces 31b1, 31c1, 33b1, and 33c1 of the cover 33. These notches 61 are formed so as to reach from the top surface 32a of the head portion 32 to the mounting groove 32d in which the vertebra 36 is mounted, and the outer half of the vertebra 36 is exposed. Further, as shown in FIG. 8, the notch 61 extends in a longitudinal direction in a portion excluding a predetermined range from both tip portions of the blade rubber 32 and portions (two locations) engaged with the holding claws 35 of the rubber holder 31. It is formed to extend.

As a result, as with the blade rubber 32 shown in FIG. 2, the distance between the rubber holder 31 and the

front walls

31b and 33b of the cover 33 and the inner surfaces 31b1, 31c1, 33b1 and 33c1 of the

rear walls

31c and 33c and the blade rubber 32 is increased. Thus, the traveling wind can easily flow between the rubber holder 31 and the blade rubber 32 or between the cover 33 and the blade rubber 32.

In the case shown in FIG. 8, the notch 61 is formed only in the predetermined portion of the blade rubber 32. However, the present invention is not limited to this, and the notch 61 is placed in any range of the blade rubber 32. You may make it form.

It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, in the above-described embodiment, the wiper blade 15 has a structure in which the cover 33 is connected to both ends of the rubber holder 31 in the longitudinal direction. However, the present invention is not limited to this, and the pair of covers 33 is not provided. The present invention may be applied to the wiper blade 15.

Moreover, in the said embodiment, although the holder side fin 41 is provided in the rubber holder 31, and the cover side fin 42 is provided in the cover 33, not only this but the

fins

41 and 42 are provided. The present invention may be applied to the rubber holder 31 and the cover 33 that are not present.

Furthermore, in the above-described embodiment, the head portion 32a of the blade rubber 32 is formed with a pair of inclined surfaces 32a3. However, the present invention is not limited to this, and the head portion 32a having a rectangular section without the inclined surface 32a3 is provided. A blade rubber 32 may be used.

Next, a vehicle wiper device according to another embodiment of the present invention will be described in detail with reference to the drawings.

10 is a perspective view showing a vehicle wiper device according to an embodiment of the present invention, FIG. 11 is a schematic view showing the operation of the vehicle wiper device, and FIG. 12 is taken along line AA in FIG. It is sectional drawing which follows.

The vehicle 111 such as an automobile is provided with a vehicle wiper device 113 (hereinafter referred to as a wiper device 13) in order to wipe off deposits such as rainwater attached to the wind glass (wind shield glass) 12. As shown in FIG. 10, the wiper device 13 has a wiper blade 114 for wiping the wind glass 112 and a wiper arm 115 for swinging the wiper blade 114 on the wind glass 112.

The wiper arm 115 includes an aluminum die-cast arm head 116, and the wiper arm 115 is fixed to a pivot shaft 118 rotatably provided on the vehicle body 117 by a nut 119 at a base end portion of the arm head 116. . The pivot shaft 118 is connected to a wiper motor (not shown) mounted on the vehicle body 117 via a link mechanism (not shown), and the wiper arm 115 is driven by the wiper motor to swing within a predetermined angle range. Yes.

The retainer 121 is connected to the tip of the arm head 116 by a connecting shaft 120 so as to be rotatable in a direction approaching and separating from the window glass 112. An arm piece 122 formed of a plate-shaped bar is fixed to the tip of the retainer 121 by caulking, and the wiper arm 115 is attached to the wiper blade 114 at the tip of the arm piece 122. The retainer 121 is formed of a steel plate or the like into an arm shape having a substantially U-shaped cross section, and an inside thereof is not shown for biasing the retainer 121 in a direction approaching the window glass 112 with the connecting shaft 120 as an axis. A spring is housed. The wiper arm 115 applies a predetermined pressing force to the wiper blade 114 by the biasing force of the spring.

On the other hand, the wiper blade 114 has a rod shape extending substantially parallel to the longitudinal direction of the wiper arm 115, and as shown in FIG. 12, a blade rubber 125 that abuts against the wiping surface 112a formed on the outer surface of the wind glass 112, And a rubber holder 126 as a cover member for holding the blade rubber 125.

The rubber holder 126 includes a primary lever 127 and a pair of secondary levers 128 connected to both ends of the primary lever 127 in the longitudinal direction. The primary lever 127 is formed to be longer in the longitudinal direction than the secondary lever 128, and the rubber holder 126 is attached to the tip of the arm piece 122 of the wiper arm 115 at a connecting portion 129 provided in the center in the longitudinal direction. Yes. As shown in FIG. 12, the rubber holder 126 (primary lever 127 and secondary lever 128) has an accommodation space 126a that opens to the wiping surface 112a side of the window glass 112, and the blade rubber 125 has an upper end side. That is, it is held by the primary lever 127 with the end opposite to the window glass 112 being accommodated in the accommodation space 126a.

The blade rubber 125 is formed of a rubber material in a rod shape having substantially the same size as the length of the rubber holder 126, is held by the primary lever 127, contacts the wiping surface 112a of the wind glass 112, and extends along the wiping surface 112a. It can be bent freely. As shown in FIG. 12, the blade rubber 125 includes a lip portion 130 that comes into contact with the wiping surface 112a at the lower end thereof, that is, one end on the side of the wind glass 112, and a substantially rectangular head that is provided on the upper end side and covered with the rubber holder 126. And a neck portion 132 that connects the lip portion 130 and the head portion 131. The neck portion 132 is formed with a small thickness in the swinging direction (left and right direction in FIG. 12) with respect to the lip portion 130 and the head portion 131, so that the lip portion 130 swings with respect to the head portion 131. It can be tilted freely.

Mounting grooves 133 are formed on both sides of the head portion 131 in the swing direction so as to extend in the longitudinal direction, and a leaf spring (vertebra) 34 is mounted on each mounting groove 133. The plate spring 134 is formed into a flat plate having a size substantially the same as the longitudinal dimension of the blade rubber 125 by punching a plate material such as a steel plate, and is elastically deformable in the vertical direction, that is, in the direction perpendicular to the wind glass 112. The blade rubber 125 is naturally bent by the spring force of the leaf spring 134 in the natural state with its both longitudinal sides facing the wind glass 112 side. When this blade rubber 125 is installed on the window glass 112 and a predetermined pressing force is applied from the wiper arm 115 to the longitudinal center of the window glass 112 via the rubber holder 126, the blade rubber 125 follows the wiping surface 112a of the window glass 112. So that it is curved. As a result, a pressing force toward the wiping surface 112a is applied to the blade rubber 125 substantially uniformly over the entire length direction, and the wiper blade 114 is swung while the entire length direction is in contact with the wiping surface 112a. Therefore, the wiper blade 114 can exhibit a good wiping property.

The rubber holder 126 is provided with fins 137 in order to improve the aerodynamic characteristics of the wiper blade 114 during traveling of the vehicle 111 and prevent the wiper blade 114 from lifting from the wiping surface 112a. The fins 137 extend along the longitudinal direction of the rubber holder 126 between the longitudinal ends of the rubber holder 126 and the connecting portion 129 at the center in the longitudinal direction, that is, on both sides in the longitudinal direction across the connecting portion 129 of the rubber holder 126. Is formed.

As shown in FIG. 12, the rubber holder 126 includes a front wall portion 138a on the front side in the swing direction (vehicle front side), a rear wall portion 138b on the rear side in the swing direction (vehicle rear side), and the front wall portions. A top wall 138c that connects the upper end of 138a and the upper end of the rear wall 138b is provided, and an accommodation space 126a that communicates with the wiping surface 112a via an opening 138d is formed therein. The fin 137 is provided integrally with the top wall 138c so as to protrude upward, that is, toward the side opposite to the window glass 13, on the rear side in the swing direction of the top wall 138c. That is, the top wall portion 138c is curved upward from the front side in the swing direction connected to the front wall portion 138a toward the rear side in the swing direction in which the fins 137 are formed. Formed on the outer surface is a wind receiving surface 139 that receives a traveling wind W (see FIG. 13) that flows from the front of the vehicle when the vehicle is traveling. As a result, when the vehicle is traveling, it receives the traveling wind W by the fins 137 (wind receiving surface 139), and generates a pressing force, that is, a down force in a direction in which the wiper blade 114 approaches the wind glass 112, thereby wiping the wiper blade 114. Can be increased.

As shown in FIG. 11, the wiper blade 114 is attached substantially parallel to the wiper arm 115 so that one end in the longitudinal direction thereof extends toward the base end of the wiper arm 115, and the wiper arm 115 is centered on the pivot shaft 118. When the wiper motor is driven to swing by the wiper motor, the wiper blade 114 swings together with the wiper arm 115 between an upper inversion position indicated by a solid line in the figure and a lower inversion position indicated by a two-dot chain line in the figure. As a result, the blade rubber 125 of the wiper blade 114 is slid on the wiping surface 112a of the wind glass 112, and on the wiping area S, which is the locus of the blade rubber 125 when moving between the upper reversal position and the lower reversal position. Rain water or the like adhering to the surface is wiped off by the wiper blade 114. That is, when the wiper blade 114 is swung forward (in the direction of arrow B) from the upper reversal position toward the lower reversal position, rainwater or the like adhering to the wiping area S is wiped by the blade rubber 125, Rainwater or the like removed from the wiping area S is collected in the pool area Sb. Similarly, when the wiper blade 114 is swung backward (in the direction of arrow C) from the lower reversal position to the upper reversal position, rainwater or the like adhering to the wiping area S is wiped by the blade rubber 125. The rainwater removed from the wiping area S is collected in the pool area Sc.

The wiper device 13 swings forward in the swing direction from the upper reversal position in order to prevent water pulling due to the back side negative pressure generated on the rear side (back side) in the swing direction of the wiper blade 114 when the vehicle is traveling. In order to prevent rainwater collected in the water pool region Sc from being drawn inside the wiping region S due to the negative pressure on the back side when traveling (upside-down), the vehicle runs through the through-hole 142 formed in the rubber holder 126. A part of the wind W is actively guided to the back side of the wiper blade 114 to suppress the generation of back side negative pressure.

FIG. 13 is an explanatory diagram showing the flow of traveling wind received by the wiper blade during vehicle travel, and FIG. 14 is an explanatory diagram showing the flow of traveling wind flowing into the rubber holder.

As shown in FIG. 10, in the present embodiment, the through holes 142 have a substantially rectangular shape extending in the longitudinal direction of the rubber holder 126, and are respectively provided on both sides in the longitudinal direction across the connecting portion 129 of the rubber holder 126. Four through holes 142 are formed at predetermined intervals in the longitudinal direction of the rubber holder 126. In other words, two through-holes 142 are formed on each side in the longitudinal direction across the connecting portion 129 of the primary lever 127 and two are formed on each pair of secondary levers 128. Of the through holes 142, the four through holes 142 a formed between the connecting portion 129 of the rubber holder 126 and one end in the longitudinal direction of the rubber holder 126 are hidden by the wiper arm 115 and are difficult to see from the outside of the vehicle. The appearance of the wiper device 13 is unlikely to deteriorate.

As shown in FIG. 12, each through hole 142 is formed in the top wall portion 138 c of the rubber holder 126. Each through hole 142 penetrates from the wind receiving surface 139 of the top wall portion 138c toward the accommodation space 126a inside the rubber holder 126 in the swinging direction (left and right direction in the figure), and the accommodation space 126a passes through each through hole 142. And opens to the wiping surface 112a side of the window glass 112, that is, to the rear side in the swinging direction, through the opening 138d. Accordingly, when the vehicle travels, as shown in FIG. 13, the traveling wind W flows upward along the fins 137 (wind receiving surface 139), that is, away from the wind glass 112 side, and part of the traveling wind W penetrates. It flows into the rubber holder 126 through the hole 142.

The traveling wind W1 flowing upward along the fin 137 is separated at the upper end of the fin 137, and flows so as to generate a back side negative pressure (vortex) on the back side (back side in the swinging direction) of the wiper blade 114. Under the influence of the negative pressure on the back surface side, rainwater collected on the back surface side of the wiper blade 114 is drawn into the wiper blade 114 side to cause a water pulling phenomenon. On the other hand, the traveling wind W2 flowing into the rubber holder 126 flows out to the back side of the wiper blade 114 through the opening 138d, and flows so as to offset the backside negative pressure generated by the traveling wind W1. That is, by providing the through hole 142 in the rubber holder 126 and actively guiding a part of the traveling wind W to the back side of the wiper blade 114, generation of negative pressure on the back side due to the traveling wind W1 is suppressed. It has become.

Further, as shown in FIG. 14, the traveling wind W2 that has flowed into the rubber holder 126 flows out to the back side of the wiper blade 114, and in the accommodation space 126a of the rubber holder 126 along the inner surface of the rear wall portion 138b. Flows in the longitudinal direction. As a result, the traveling wind W2 can actively flow out to the back side of the wiper blade 114 not only between the positions where the through holes 142 are formed but also between the positions where the through holes 142 are formed.

In this manner, the through hole 142 is formed in the top wall portion 138c of the rubber holder 126, and a part of the traveling wind W (traveling wind W2) is transferred to the back side of the wiper blade 114 through the through hole 142 and the opening 138d. Since the guide is positively guided, the traveling wind W2 guided to the back side of the wiper blade 114 suppresses the generation of backside negative pressure due to the traveling wind W1 flowing upward along the fins 137. Therefore, for example, it is possible to prevent rainwater collected in the water pool region Sc when the wiper blade 114 is turned over from being drawn into the wiping region S due to the negative pressure on the back side. Further, the traveling wind W2 flowing into the rubber holder 126 flows out to the back side of the wiper blade 114, and flows in the longitudinal direction in the accommodation space 126a of the rubber holder 126 along the inner surface of the rear wall portion 138b. The traveling wind W2 can flow out to the back side of the wiper blade 114 almost uniformly in the entire longitudinal direction of the rubber 14, and the occurrence of negative pressure on the back side can be reliably prevented over the entire longitudinal direction of the wiper blade 114.

As shown in FIG. 12, the rear wall portion 138b of the rubber holder 126 is formed so as to be inclined at an inclination angle α with respect to a direction (vertical direction in the figure) perpendicular to the wind glass 112 throughout its longitudinal direction. That is, the rear wall portion 138b is formed so as to be inclined away from the blade rubber 125 toward the wiping surface 112a side of the wind glass 112, and a gap d1 between the rear wall portion 138b and the blade rubber 125 in the opening portion 138d. However, it is set wider than the gap d2 between the front wall 138a and the blade rubber 125 in the opening 138d. As a result, the traveling wind W2 flowing into the rubber holder 126 is easily guided to the back side of the blade rubber 14 through the gap d1. In addition, the inclination angle α of the rear wall portion 138b is set to an angle that is hidden by the rear wall portion 138b so that the blade rubber 125 is not easily visible from the inside of the vehicle, so that the appearance of the wiper device 13 is not deteriorated.

FIG. 15 is a perspective view showing a vehicle wiper device according to another embodiment of the present invention. In another embodiment, the through hole 142 includes a connecting portion 129 of the rubber holder 126 and one longitudinal end of the rubber holder 126. There are only four through-holes 142a formed between the two. As described above, the through hole 142a is hidden by the wiper arm 115 and is difficult to be visually recognized from the outside of the vehicle. By forming only the through hole 142a in the rubber holder 126, the appearance of the wiper device 13 is not further deteriorated. be able to. It should be noted that the water pulling phenomenon is largely caused by the back side negative pressure (vortex) generated at the back side of one end of the blade rubber 14 in the longitudinal direction, and therefore, the through hole 142 is formed in the rubber holder 126 as in other embodiments. Even in the type that is not formed on the other end in the longitudinal direction, the water drawing phenomenon can be sufficiently prevented.

It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, in the above-described embodiment, four through holes 142 are provided on both sides in the longitudinal direction across the connecting portion 129 of the rubber holder 126, or one end in the longitudinal direction of the rubber holder 126 (the connecting portion 129 and one end in the longitudinal direction). However, the number and shape of the through holes 142 are not limited to this, and it is sufficient that at least one through hole 142 is provided on one end side in the longitudinal direction of the rubber holder 126.

In the first embodiment, the rear wall portion 138b of the rubber holder 126 is formed so as to be inclined over the entire longitudinal direction. However, the rear wall portion 138b is inclined at least on one end side in the longitudinal direction of the rubber holder 126. To be formed.

Claims

A wiper blade attached to the tip of the wiper arm to wipe the windshield of the vehicle,
A rubber holder provided with holding claws at both ends in the longitudinal direction, and attached to the wiper arm at the center in the longitudinal direction;
A blade rubber that engages with the holding claw and is held by the rubber holder, and a middle portion in the longitudinal direction is covered by the rubber holder and contacts the window glass;
The rubber holder includes a ceiling wall, a front wall disposed on the vehicle front side with respect to the ceiling wall, and a rear wall disposed on the vehicle rear side with respect to the ceiling wall,
The distance between the inner surface of the rear wall and the blade rubber gradually increases from the both longitudinal ends of the rubber holder toward the center with respect to the distance between the inner surface of the front wall and the blade rubber. And wiper blade.
2. The wiper blade according to claim 1, wherein an interval between a lower end of the rear wall and the window glass is directed from a longitudinal end portion of the rubber holder toward a center portion with respect to an interval between the lower end of the front wall and the window glass. A wiper blade that gradually increases in size.
A wiper blade attached to the tip of the wiper arm to wipe the windshield of the vehicle,
A rubber holder provided with holding claws at both ends in the longitudinal direction, and attached to the wiper arm at the center in the longitudinal direction;
A blade rubber that engages with the holding claw and is held by the rubber holder, and a middle portion in the longitudinal direction is covered by the rubber holder and contacts the window glass;
A pair of covers that are connected to both ends of the rubber holder in the longitudinal direction and cover the tip side portion of the blade rubber protruding from the rubber holder;
The rubber holder and the cover each include a ceiling wall, a front wall disposed on the vehicle front side with respect to the ceiling wall, and a rear wall disposed on the vehicle rear side with respect to the ceiling wall,
The distance between the inner surface of the rear wall and the blade rubber gradually increases from the both ends in the longitudinal direction of the rubber holder or the cover toward the center with respect to the distance between the inner surface of the front wall and the blade rubber. A wiper blade characterized by that.
4. The wiper blade according to claim 3, wherein a distance between a lower end of the rear wall and the window glass is centered from both ends in the longitudinal direction of the rubber holder or the cover with respect to a distance between the lower end of the front wall and the window glass. A wiper blade that gradually increases in size toward the part.
A blade rubber that slides on a wiping surface, and a wiper blade that includes a cover member that holds the blade rubber and covers the blade rubber;
A wiper device for a vehicle having a wiper arm attached to a longitudinally central portion of the wiper blade and attached to a vehicle body in a swingable manner,
The cover member is
A front wall portion provided on the vehicle front side of the blade rubber;
A rear wall provided on the vehicle rear side of the blade rubber;
A top wall portion comprising a fin for connecting the front wall portion and the rear wall portion, and having a fin for biasing the wiper blade toward the wiping surface by receiving a traveling wind;
An opening that opens to the wiping surface;
A vehicle wiper device, comprising: a through hole formed in the top wall portion for guiding a part of traveling wind toward the vehicle rear side of the wiper blade through the opening.
6. The vehicle wiper device according to claim 5, wherein at least one through hole is formed between a longitudinal center portion of the wiper blade and one longitudinal end portion of the wiper blade on the base end side of the wiper arm. A vehicle wiper device.
7. The vehicle wiper device according to claim 5, wherein the rear wall portion is wiped between at least a longitudinal center portion of the wiper blade and a longitudinal end portion of the wiper blade on the base end side of the wiper arm. A vehicle wiper device, wherein the vehicle wiper device is formed so as to be inclined in a direction away from the blade rubber toward the surface side.