JP5940926B2 - Wiper blade - Google Patents

Description

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

  Conventionally, the wiper blade has a low height by attaching a blade rubber to a case that houses a leaf spring-like backing without using a lever assembly in which multiple levers are connected in a tournament shape. There is. For example, in the wiper blade of Patent Document 1, the blade rubber is held in the case on the wiping surface side of the backing, and the pressing force from the wiper arm is distributed through the backing and torsional rigidity and elasticity are imparted. Thus, it follows the wiping surface and comes into press contact.

Special table 2008-546596 gazette

  By the way, in the wiper blade as described above, the backing width (dimension in the short direction) is set larger than the width of the blade rubber so as to give the blade rubber sufficient torsional rigidity and elasticity. And the case which accommodates the backing projects over the vehicle front side rather than the blade rubber. For this reason, when the vehicle travels, the traveling wind that flows along the wiping surface and blows against the wiper blade is blocked by the case protruding forward, and the pressure in the space on the wiping surface side on the front side of the case As a result, the wiper blade tends to lift from the wiping surface.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a wiper that can suppress the lifting from the wiping surface during traveling of the vehicle while ensuring the torsional rigidity and elasticity of the backing. To provide a blade.

In order to solve the above-mentioned problem, the invention according to claim 1 has a long blade rubber for wiping the wiping surface and a long shape along the longitudinal direction of the blade rubber, and the blade rubber is rigid. A wiper blade having a leaf spring-like backing for imparting elasticity and a resin case that has a backing accommodating portion for accommodating the backing and holds the blade rubber on the wiping surface side of the backing there, with the widthwise center line of the backing is offset to the vehicle rear side with respect to the width direction center line of the blade rubber, the backing and are said blade rubber is accommodated in the case, wherein the case And holding portions extending from the front edge and the rear edge, respectively, and the holding portions are positioned in the holding grooves on both sides in the width direction of the blade rubber. The wiping surface side surface of the holding portion on the front end side and the rear end side has a wiping surface side inclined surface that approaches the wiping surface toward the holding groove, and each of the cases The holding portion includes a thick portion in which the thickness of the resin in the height direction of the blade rubber is greater than the thickness of the resin in the holding groove between the wiping surface side inclined surface and the backing housing portion of the case. Is formed .

  In this invention, since the backing is offset to the rear side of the vehicle with respect to the blade rubber, it is possible to reduce the amount of the case housing the backing to the front side of the vehicle. As a result, the flow of the traveling wind that flows along the wiping surface and over the wiper blade becomes smooth, so the increase in the pressure of the space on the wiping surface side of the case that protrudes forward is suppressed, and from the wiping surface Can be prevented from rising. Further, in the present invention, since it is not necessary to reduce the width of the backing in order to reduce the amount of protrusion of the case to the front side of the vehicle, while ensuring the torsional rigidity and elasticity of the backing, Lifting can be suppressed.

In addition, the traveling wind flowing toward the wiping surface at the front edge of the case flows smoothly by the wiping surface side inclined surface of the holding portion on the front end side. For this reason, it is possible to more effectively suppress the pressure increase in the space on the wiping surface side of the front edge of the case (the portion protruding forward from the blade rubber), and as a result, the lift from the wiping surface of the wiper blade can be further suppressed. Further suppression can be achieved.
Further, since the strength of each holding portion is improved by the thick portion, for example, when the blade rubber attached to the wiping surface by freezing is peeled off, the blade rubber can be prevented from coming out from the case.
According to a second aspect of the present invention, in the wiper blade according to the first aspect, the upper portion of the case on the side opposite to the wiping surface receives the traveling wind during forward traveling of the vehicle on the inclined surface, and the wiping is performed. A fin portion for generating a pressing force to the surface side is provided, and a center line in the width direction of the fin portion is offset to the vehicle rear side with respect to the center line in the width direction of the blade rubber. .

  In this invention, the lifting force from the wiping surface of the wiper blade when the vehicle is traveling can be further suppressed by the pressing force generated on the wiping surface side at the fin portion of the case. In addition, since the center line in the width direction of the fin portion is offset toward the vehicle rear side with respect to the center line in the width direction of the blade rubber, the width of the fin portion is reduced while reducing the amount of protrusion of the case to the vehicle front side. Without this, it is possible to ensure a pressing force to the wiping surface generated at the fin portion.

The invention described in claim 3 is the wiper blade according to claim 2, a resin material constituting the casing is characterized in that it has a higher hardness than the resin material forming the fin portion.

The invention described in claim 4 is the wiper blade according to any one of claims 1 to 3, wherein the backing housed before Kiba Kkingu accommodating section, the vehicle front side and the rear than the blade rubber It is configured to protrude to the side.

  Therefore, according to the above-described invention, it is possible to suppress the lifting of the wiper blade during traveling of the vehicle while ensuring the torsional rigidity and elasticity of the backing.

It is a perspective view of the wiper for vehicles of an embodiment. It is sectional drawing (AA sectional drawing of FIG. 1) of the wiper blade of the same form.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.
As shown in FIG. 1, a vehicle wiper 10 according to the present embodiment is for wiping raindrops and the like attached to the surface (wiping surface G) of a windshield of a vehicle. And a wiper blade 12 connected to the wiping surface G and connected to the wiping surface G. In the vehicle wiper 10, the wiper blade 12 reciprocally swings when the wiper arm 11 rotates by a predetermined angle by a wiper motor (not shown), and the wiper blade 12 that swings wipes the wiping surface G. The wiper arm 11 is provided with a spring (not shown) for generating a pressing force that presses the wiper blade 12 against the wiping surface G.

  As shown in FIGS. 1 and 2, the wiper blade 12 includes a long blade rubber 13 made of a rubber material or an elastomer having elasticity, and a backing 14 provided along the longitudinal direction of the blade rubber 13. And a connecting device 15 for connecting the blade rubber 13 and the backing 14 to the tip of the wiper arm 11, and a case 16 that is disposed on each side in the longitudinal direction of the connecting device 15 and is inserted through the backing 14. Note that caps 17 for preventing the case 16 and the blade rubber 13 from coming off are attached to both ends of the wiper blade 12 in the longitudinal direction.

  As shown in FIG. 2, the blade rubber 13 is formed symmetrically with respect to the center line L1 in the width direction (left-right direction in FIG. 2), and its cross-sectional shape is constant along the longitudinal direction. Is formed. On the upper portion of the blade rubber 13, a head portion 21 held by the case 16 is formed over the entire longitudinal direction of the blade rubber 13. The head portion 21 has a flat shape with a small thickness in the height direction (perpendicular to the wiping surface G), and a connecting portion 22 extending downward from the center in the width direction of the head portion 21 is formed at the lower portion of the head portion 21. An extending portion 23 that is thinner than the head portion 21 in the height direction is formed. The extending portion 23 extends from the lower end of the connecting portion 22 to both sides in the width direction of the blade rubber 13, and the width direction dimension of the entire extending portion 23 is determined when the wiping portion 26 described later tilts. The width of the head portion 21 is wider than the width of the head portion 21 so that the shoulder portion of the wiping portion 26 abuts, and the tilting posture of the wiping portion 26 is regulated by this abutment. A constricted portion 24 (holding groove) that is recessed inward from both side surfaces in the width direction is constituted by the connecting portion 22 that is formed narrow in the width direction with respect to the head portion 21 and the extending portion 23.

  A wiping portion 26 is formed on the lower portion of the blade rubber 13 via a neck portion 25 extending from the lower surface of the extending portion 23. The neck portion 25 is formed at the center of the blade rubber 13 in the width direction and is located below the connecting portion 22, and has a narrower width than the connecting portion 22. The wiping portion 26 has a tapered shape whose width becomes narrower from the upper portion (the end portion on the neck portion 25 side) toward the lower portion, and has a width substantially equal to the neck portion 25 at the lower end portion. The wiping portion 26 can be tilted in the width direction with respect to the head portion 21 by bending of the neck portion 25.

  On the upper side (reverse wiping surface side) of the head portion 21 of the blade rubber 13, a backing 14 made of a metal leaf spring material is disposed. The backing 14 has a long shape along the longitudinal direction of the blade rubber 13, and the length in the longitudinal direction is set to the same length as the blade rubber 13. The backing 14 is disposed so that the plate surface thereof is orthogonal to the height direction of the blade rubber 13, and the backing 14 is in contact with the upper surface of the head portion 21 (the end surface on the anti-wiping portion side) and the height direction of the blade rubber 13. It touches. The width of the backing 14 is set wider than the width of the head portion 21, and both end portions in the width direction of the backing 14 protrude outward in the width direction from the head portion 21.

  The connecting device 15 is rotatably and detachably connected to the tip of the wiper arm 11 via a connecting clip (not shown), and holds the head portion 21 of the blade rubber 13 and the longitudinal center portion of the backing 14. Yes. Specifically, at the lower part of the coupling device 15, a holding part (see FIG. 5) that surrounds the periphery of the center part in the longitudinal direction of the head part 21 and the backing 14 and restricts movement in the longitudinal orthogonal direction (height direction and width direction). (Not shown) is provided. Further, the coupling device 15 includes a stopper (not shown) that restricts the backing 14 from being movable in the longitudinal direction at the center in the longitudinal direction of the backing 14.

  The case 16 is provided along the longitudinal direction on the base end side (side near the rotational drive shaft of the base end of the wiper arm 11) and the distal end side with the coupling device 15 in the longitudinal center of the wiper blade 12 interposed therebetween. . The length of each case 16 is slightly shorter than the half of the backing 14. Each case 16 includes a holding rail 31 that surrounds and holds the periphery of the head portion 21 and the backing 14 of the blade rubber 13, and a fin portion 32 provided on the upper portion of the holding rail 31.

  The holding rail 31 is made of a soft (flexible) resin material and has a substantially cylindrical shape extending along the longitudinal direction of the blade rubber 13. More specifically, the holding rail 31 has an upper covering portion 33 that covers the upper surface of the backing 14 (the surface on the side opposite to the blade rubber), and extends from the front edge and the rear end edge of the upper covering portion 33, respectively. And the holding parts 34 and 35 surrounding the width direction both sides and the lower part of the head part 21 are formed over the entire longitudinal direction of the case 16. That is, inside the holding rail 31, a backing housing portion 36 and a head housing portion 37 constituted by the upper covering portion 33 and the holding portions 34 and 35 are formed. Of the two holding portions 34, 35, the one on the vehicle front side is the holding portion 34, and the one on the vehicle rear side is the holding portion 35.

  The backing accommodating portion 36 and the head accommodating portion 37 are portions for accommodating the backing 14 and the head portion 21 of the blade rubber 13, respectively. The backing accommodating portion 36 and the head accommodating portion 37 are formed over the entire longitudinal direction of the holding rail 31. It is open at. The backing housing portion 36 has a width that is substantially equal to the width of the backing 14 and a thickness (depth) that is substantially equal to the thickness of the backing 14, and the head housing portion is located below the wiping housing portion 36 (on the wiping surface G side). 37 is formed so as to communicate with the backing housing portion 36. The head accommodating portion 37 is narrower than the backing accommodating portion 36 and has a width substantially equal to the width of the head portion 21 and a thickness (depth) substantially equal to the thickness of the head portion 21.

  The tips of the holding portions 34 and 35 of the holding rail 31 are inserted into the constricted portion 24 below the head portion 21 of the blade rubber 13. In other words, the connecting portion 22 of the blade rubber 13 is inserted into the groove between the tips of the holding portions 34 and 35. Thus, the head portion 21 is locked in the height direction of the blade rubber 13 with respect to the tips of the holding portions 34 and 35. The width between the tips (grooves) of the holding portions 34 and 35 is formed substantially equal to the width of the connecting portion 22, and the thickness of the tips of the holding portions 34 and 35 is the thickness of the connecting portion 22. It is formed approximately equal to (length in the vertical direction).

  As described above, the holding rail 31 of each case 16 surrounds and holds the backing 14 and the head portion 21 in a state where the backing 14 is in contact with the upper surface of the head portion 21. And the extension part 23, the neck part 25, and the wiping part 26 of the blade rubber 13 are exposed under the holding rail 31 (wiping surface G side). The backing 14 and the head portion 21 are held by the holding portion of the coupling device 15 at the center in the longitudinal direction, and the holding portion has substantially the same configuration as the holding rail 31 of the case 16. The holding rail 31 of the other case 16 communicates with the holding rail 31 of the other case 16 via the holding portion of the connecting device 15.

  In the case 16 and the holding portion of the coupling device 15 configured as described above, the width direction center line L2 of the backing 14 is rearward of the vehicle over the entire length direction with respect to the width direction center line L1 of the blade rubber 13. The backing 14 and the blade rubber 13 are held in an offset state (shifted state). That is, the protruding amount of the backing 14 toward the vehicle front side with respect to the head portion 21 is set smaller than the protruding amount toward the vehicle rear side. Thereby, it is possible to reduce the amount of protrusion of the holding portion 34 on the front end side that holds the backing 14 toward the front side of the vehicle without reducing the width dimension of the backing 14. The action line P of the pressing force with which the wiper arm 11 presses the wiper blade 12 toward the wiping surface G is configured to overlap the center line L1 of the blade rubber 13 in the width direction. It acts on the wiping portion 26 of the rubber 13 in a balanced manner in the width direction. As a result, the width direction center line L1 of the blade rubber 13 is offset to the vehicle front side with respect to the width direction center line L2 of the backing 14, and the width direction center line L2 of the backing 14 apparently becomes the width direction center line of the blade rubber 13. The wiper blade 12 is reversed as compared with a configuration in which the center line L1 of the blade rubber 13 and the action line P of the pressing force of the wiper arm 11 are offset in the width direction with respect to L1 offset to the rear side of the vehicle. When the blade rubber 13 is tilted, that is, the tilting posture is reversed smoothly between the forward movement and the backward movement.

  Further, on the lower surface (surface on the wiping surface G side) of each holding portion 34, 35, an inclined surface 38 (wiping surface side inclined surface) that approaches the wiping surface G as it goes toward the tip (that is, toward the constricted portion 24). Is formed. Here, the inner surfaces of the holding portions 34 and 35 have a step shape formed between the backing housing portion 36 and the head housing portion 37, and the holding portions 34 and 35 have a step shape formed on the inner surface. The lower surface is an inclined surface 38. For this reason, the part between the backing accommodating part 36 and the inclined surface 38 in each holding | maintenance part 34 and 35 is comprised as the thick part 39 with the thickness of the height direction of the blade rubber 13, and each holding | maintenance part 34 is comprised. , 35 is improved.

  In each case 16, a fin portion 32 is provided on the upper side of the holding rail 31 opposite to the wiping surface G. The fin portion 32 is made of an elastomer material and is formed integrally with the holding rail 31 by two-color molding. The fin part 32 has the inclined surface 32a in which the height from the wiping surface G becomes higher toward the rear side of the vehicle in a state where the wiper blade 12 is disposed at the stop position. The inclined surface 32a is also formed across the upper surface of the holding rail 31 on the vehicle front side. In addition, a lip fin portion 32b that stands in parallel with the height direction of the blade rubber 13 is formed at the end of the inclined surface 32a on the vehicle rear side. The fin portion 32 acts so as to generate a pressing force toward the wiping surface G by receiving the traveling wind W when the vehicle is traveling forward on the inclined surface 32a.

  When the backing 14 is viewed with the fins 32 as a reference, the width direction center line L2 is offset with respect to the width direction center line L1 of the blade rubber 13 above the inclined surface 32a (vehicle rear side). Further, the end of the backing 14 on the vehicle rear side is configured to overlap the lip fin portion 32b in the height direction of the wiper blade 12 (the direction perpendicular to the wiping surface G). Further, the width direction center line L3 of the fin portion 32 including the inclined surface 32a and the lip fin portion 32b is offset to the vehicle rear side with respect to the width direction center line L1 of the blade rubber 13.

Next, the operation of this embodiment will be described.
In the vehicle wiper 10 configured as described above, the pressing force from the distal end portion of the wiper arm 11 is transmitted to the blade rubber 13 via the coupling device 15 and the backing 14. At this time, the backing 14 disperses the pressing force from the wiper arm 11 in the longitudinal direction, and the wiping portion 26 of the blade rubber 13 is pressed against the wiping surface G over the entire longitudinal direction. In this state, the wiper arm 11 is reciprocally rotated, so that the wiping surface G is wiped by the blade rubber 13. At the time of wiping, the wiping portion 26 of the blade rubber 13 is in contact with the wiping surface G while being tilted in the width direction (tilted posture) with respect to the wiping surface G. In FIG. The state which stands upright with respect to the wiping surface G is shown.

  Here, during traveling forward of the vehicle, the wiper blade 12 receives traveling wind W from the front side of the vehicle. At this time, when the traveling wind W hits the inclined surface 32 a of the fin portion 32, a pressing force toward the wiping surface G is generated in the case 16, and the blade rubber 13 is pressed against the wiping surface G. Thereby, the lift from the wiping surface G of the wiper blade 12 is suppressed. The lip fin portion 32b promotes a smooth flow of the traveling wind W flowing along the inclined surface 32a to the upper rear portion. As a result, the traveling wind W over the wiper blade 12 is prevented from flowing around the wiper blade 12 and becoming turbulent.

  Further, in this embodiment, by offsetting the backing 14 toward the vehicle rear side with respect to the blade rubber 13, the holding portion 34 at the front end of the case 16 toward the vehicle front side without reducing the width dimension of the backing 14 is provided. Since the overhang amount can be reduced, the flow of the traveling wind W flowing along the wiping surface G and exceeding the wiper blade 12 can be made smooth. Thereby, the increase in the pressure of the space by the side of the wiping surface G of the holding | maintenance part 34 projected over the front side is suppressed, As a result, the lift from the wiping surface G of the wiper blade 12 is suppressed.

  Further, since the traveling wind W flowing toward the wiping surface G at the front end edge of the case 16 smoothly flows through the inclined surface 38 of the holding portion 34 on the front end side, the space on the wiping surface G side of the holding portion 34 protruding to the front side. As a result, the rising of the wiper blade 12 from the wiping surface G is further suppressed.

As described above, since the lifting of the wiper blade 12 is suppressed, good wiping by the wiping portion 26 of the blade rubber 13 is realized.
Next, characteristic effects of the present embodiment will be described.

  (1) A case 16 that houses the backing 14 and holds the blade rubber 13 on the wiping surface G side of the backing 14 is provided. In the case 16, the center line L <b> 2 in the width direction of the backing 14 is the width of the blade rubber 13. The backing 14 and the blade rubber 13 are accommodated in a state offset to the vehicle rear side with respect to the direction center line L1. For this reason, it is possible to reduce the amount of protrusion of the case 16 that houses the backing 14 toward the front side of the vehicle. As a result, the flow of the traveling wind W that flows along the wiping surface G and passes over the wiper blade 12 becomes smooth, so that an increase in the pressure in the space on the wiping surface G side of the case 16 projecting forward is suppressed. Thus, lifting from the wiping surface G of the wiper blade 12 can be suppressed. Further, in this configuration, since it is not necessary to reduce the width of the backing 14 in order to reduce the amount of protrusion of the case 16 toward the front side of the vehicle, wiping during traveling of the vehicle is ensured while ensuring the torsional rigidity and elasticity of the backing 14. Lifting from the surface G can be suppressed.

  (2) In the upper part of the case 16 opposite to the wiping surface G, there is provided a fin portion 32 that receives the traveling wind W when the vehicle is traveling forward on the inclined surface 32a and generates a pressing force toward the wiping surface G. It is done. Thereby, the lift from the wiping surface G of the wiper blade 12 during traveling of the vehicle can be further suppressed by the pressing force toward the wiping surface G generated at the fin portion 32 of the case 16. Further, since the width direction center line L3 of the fin portion 32 is offset to the vehicle rear side with respect to the width direction center line L1 of the blade rubber 13, the amount of protrusion of the case 16 toward the vehicle front side is reduced. It is possible to ensure the pressing force to the wiping surface G generated at the fin portion 32 without reducing the width of the fin portion 32.

  (3) The case 16 is formed with holding portions 34 and 35 that are respectively extended from the front end edge and the rear end edge thereof and inserted into the constricted portions 24 (holding grooves) on both sides in the width direction of the blade rubber 13. And the inclined surface 38 (wiping surface side inclined surface) which approaches the wiping surface G as it goes to the constricted part 24 in the lower surface (surface on the wiping surface G side) of each holding part 34,35 of the front end side and the rear end side. Is formed. According to this configuration, the traveling wind W flowing toward the wiping surface G at the front end edge of the case 16 smoothly flows through the inclined surface 38 of the holding portion 34 on the front end side, so that the wiping surface of the holding portion 34 protruding to the front side. An increase in pressure in the G side space can be more effectively suppressed. As a result, lifting from the wiping surface G of the wiper blade 12 can be further suppressed.

  Further, in the case 16, the backing 14 is configured to protrude toward the vehicle front side and the rear side from the blade rubber 13, and each holding portion 34, 35 is provided between the inclined surface 38 and the backing housing portion 36. Thus, a thick portion 39 having a large thickness in the height direction of the blade rubber 13 is formed. As a result, the strength of the holding portions 34 and 35 is improved by the thick portion 39. For example, when the blade rubber 13 attached to the wiping surface G by freezing is peeled off with the case 16, the blade The rubber 13 can be prevented from coming out from the case 16.

  Each case 16 is made of an elastomer material and is integrally formed with the holding rail 31 by two-color molding. However, if the blade rubber 13 is removed from the case 16 as described above, It is preferable that the resin material forming the holding rail 31 has higher hardness than the resin material forming the fin portion 32.

In addition, you may change embodiment of this invention as follows.
In the above embodiment, the inclined surface 38 is formed on the lower surface of each holding portion 34, 35. However, for example, the inclined surface 38 is formed only on the holding portion 34 on the front end side, and the holding portion 35 on the rear end side The lower surface of each may be formed in a step shape along the inner surface of the holding portion 35. Moreover, it is good also considering the lower surface of both holding | maintenance parts 34 and 35 as a level | step difference shape along those inner surfaces.

  -In above-mentioned embodiment, although the fin part 32 was comprised from the inclined surface 32a and the lip fin part 32b, it is not specifically limited to this, For example, the lip fin part 32b is abbreviate | omitted and only the inclined surface 32a. The fin portion 32 may be configured.

-Case 16 does not necessarily need to be provided with fin part 32, for example, may consist only of holding rail 31.
In the above-described embodiment, the backing storage portion 36 and the head storage portion 37 are communicated with each other in the holding rail 31 so that the backing 14 contacts the head portion 21 of the blade rubber 13. It is not something. For example, a wall portion that separates the backing housing portion 36 and the head housing portion 37 is provided in the holding rail 31, and the elasticity (deflection) in the wiping surface G direction of the backing 14 having torsional rigidity is provided via the wall portion. It is good also as a structure so that it may be transmitted to the part 21. FIG.

  In the above embodiment, the wiper blade 12 is configured to include the pair of cases 16, but is not particularly limited thereto. For example, a case having a length substantially equal to the backing 14 (blade rubber 13) is used. The structure provided only with one may be sufficient.

  In the above embodiment, the connecting device 15 is configured to hold the backing 14 and the head portion 21 of the blade rubber 13 between the pair of cases 16, but for example, the connecting device 15 holds the case 16. It is good also as composition to do. Moreover, in the said embodiment, although the connection apparatus 15 was provided in the wiper blade 12 side, you may provide in the wiper arm 11 side.

  In the above-described embodiment, the vehicle wiper 10 has been described as wiping the wiping surface G of the windshield, but may be used as a rear wiper for wiping the rear glass.

  DESCRIPTION OF SYMBOLS 10 ... Wiper for vehicles, 11 ... Wiper arm, 12 ... Wiper blade, 13 ... Blade rubber, 14 ... Backing, 16 ... Case, 21 ... Head part, 24 ... Narrow part (holding groove), 26 ... Wiping part, 31 ... Holding Rail, 32 ... Fin part, 32a ... Inclined surface, 34, 35 ... Holding part, 36 ... Backing accommodating part, 37 ... Head accommodating part, 38 ... Inclined surface (wiping surface side inclined surface), 39 ... Thick part, G ... wiping surface, W ... traveling wind, L1 ... width direction center line of blade rubber, L2 ... width direction center line of backing, L3 ... width direction center line of fin part.

Claims (4)

A long blade rubber to wipe the wiping surface;
A long spring shape along the longitudinal direction of the blade rubber, a leaf spring-like backing for imparting rigidity and elasticity to the blade rubber;
A wiper blade having a backing housing portion for housing the backing and a resin case for holding the blade rubber on the wiping surface side of the backing,
The backing and the blade rubber are accommodated in the case in a state where the center line in the width direction of the backing is offset to the vehicle rear side with respect to the center line in the width direction of the blade rubber .
The case is provided with holding portions extending from the front edge and the rear edge, respectively, and the holding portions are located in holding grooves on both sides in the width direction of the blade rubber,
The surface on the wiping surface side of the holding portion on the front end side and the rear end side has a wiping surface side inclined surface that approaches the wiping surface as it goes to the holding groove,
In each holding part of the case, the thickness of the resin in the height direction of the blade rubber between the wiping surface side inclined surface and the backing accommodating part of the case is larger than the thickness of the resin in the holding groove. A wiper blade characterized in that a thick part is formed . The wiper blade according to claim 1,
The upper part of the case opposite to the wiping surface is provided with a fin portion that receives a traveling wind at the time of traveling forward of the vehicle on an inclined surface and generates a pressing force toward the wiping surface side,
The wiper blade according to claim 1, wherein a center line in the width direction of the fin portion is offset toward the vehicle rear side with respect to a center line in the width direction of the blade rubber. The wiper blade according to claim 2 ,
The wiper blade according to claim 1, wherein the resin material constituting the case has a higher hardness than the resin material constituting the fin portion . The wiper blade according to any one of claims 1 to 3 ,
The backing contained before Kiba Kkingu accommodating section, the wiper blade, characterized in that it is configured to protrude toward the vehicle front side and the rear side of the blade rubber.