JP4299720B2 - Wiper blade - Google Patents

Description

  The present invention relates to a wiper blade for a vehicle having a structure in which the blade rubber protrudes long in the longitudinal direction from a grip portion of a lever that grips the blade rubber.

  Some vehicle wiper blades are configured to hold a blade rubber by a lever assembly in which a plurality of levers are connected in a tournament shape. By configuring each lever in a tournament shape, the height direction of the wiper blade ( For example, there is one configured as shown in Patent Document 1 because the dimension in the direction away from the wiping surface is increased.

The wiper blade of this document includes a holder member (in the document, a connecting device) coupled to a wiper arm, and a longitudinal portion of a bifurcated backing (in the document, a support member) extending in the longitudinal direction of a blade rubber (in the document, a wiper strip). The structure is connected at the center in the direction and supports the blade rubber by the backing. The backing extending on both sides in the longitudinal direction of the holder member and the portion of the blade rubber supported by the backing serve as a free end portion of the wiper blade that freely follows the curvature according to the curvature of the wiping surface.
Japanese National Patent Publication No. 11-512994

  However, the wiper blade of this document only considers the curved follow-up of the wiping surface, and the free end of the wiper blade is easy to follow the curved follow in the wiping surface direction. The width is gradually decreased from the longitudinal central portion connected by the holder member toward both longitudinal end portions. Therefore, if the width of the backing is easily reduced from the central part in the longitudinal direction toward the both ends in the longitudinal direction in consideration of only the curve following in the wiping surface direction, the torsional rigidity of the free end part of the wiper blade However, since the blade rubber falls too much at both ends in the longitudinal direction of the wiper blade, an appropriate contact angle of the blade rubber cannot be obtained. As a result, there was a problem that good wiping performance could not be obtained at both longitudinal ends of the wiper blade.

  The present invention has been made in view of such circumstances, and the object thereof is a wiper blade having a free end portion in which the blade rubber protrudes long in the longitudinal direction from a grip portion of a lever that grips the blade rubber. An object of the present invention is to provide a wiper blade capable of preventing the blade rubber from falling too much at its free end and obtaining good wiping performance.

In order to solve the above-mentioned problem, the invention according to claim 1 has a blade rubber having a wiping portion for wiping the wiping surface, and a spring property accommodated in a backing mounting groove formed in the longitudinal direction of the blade rubber. A backing portion having a wiper arm rotatably connected thereto, an arm portion extending from the holder portion toward both sides in the longitudinal direction of the blade rubber, and the blade rubber provided at a tip portion of the arm portion. A lever having a gripping part for gripping the backing, and the blade rubber mounted with the backing protrudes from the gripping part of the lever by a predetermined length in the longitudinal direction to freely follow the curvature of the wiping surface. A wiper blade configured with a free end, wherein the backing has the same width along the longitudinal direction or longer than the center in the longitudinal direction A pair of backing plate members Kotan portion side is formed wider, and a connecting member connecting together the ends of the backing plate, insertably consists one longitudinal side to the blade rubber, the blade rubber Is formed with a locking projection for locking the connecting member in a state in which the backing is mounted, and when the backing is inserted into the blade rubber, the connecting member gets over the locking projection, and the backing is The connecting member is configured to be in a state of being locked to the locking protrusion in the mounted state, and the connecting member has a contact angle with the wiping surface of the blade rubber at the free end portion of the both grips. to be within a range of predetermined said contact angle between parts, to a benzalkonium adjust the rigidity of contributing the backing twisting direction of the free end and its gist .

  According to a second aspect of the present invention, in the wiper blade according to the first aspect, the rigidity of the backing is adjusted so that a range of the predetermined contact angle between the gripping portions is 30 ° to 50 °. The gist of this is

According to a third aspect of the present invention, in the wiper blade according to the first or second aspect, the backing includes a pair of backing plate members having a uniform cross-sectional shape in the longitudinal direction, and the connecting member. is a benzalkonium be coupled to each other the ends of the wiping part and the respective backing plate located in the polymerised state on the opposite side of the blade rubber and its gist.

According to a fourth aspect of the present invention, in the wiper blade according to any one of the first to third aspects, the connecting member has an arch shape straddling both backing plate members at one end side in the longitudinal direction of the backing. Connecting the backing plate material, connecting the insertion member to the blade rubber from one side in the longitudinal direction of the backing, and connecting the backing plate material so as to straddle both backing plate materials at the other longitudinal side of the backing. And a regulating-side connecting member that regulates the further movement of the backing inserted in the blade rubber in the insertion direction .

  According to a fifth aspect of the present invention, in the wiper blade according to any one of the first to fourth aspects, the cover is formed to have a length substantially equal to the blade rubber and covers the upper portion of the blade rubber and the lever. The gist is that the member is provided.

(Function)
According to the invention described in the claims, the wiper blade, the free end is free to follow the curvature of the wiping surface is projected longer by a predetermined length in the longitudinal direction of the blade rubber wearing the backing from the grip portion of the lever Is configured. The backing is formed with the same width along the longitudinal direction or wider in the longitudinal direction end side than the longitudinal center, and the contact angle with the wiping surface of the blade rubber at the free end is a predetermined contact angle between the two gripping parts. The rigidity of the backing that contributes to the torsional direction of the free end is adjusted by the adjusting portion provided in the backing so that the free end is within the range. In other words, the contact angle with the wiping surface of the blade rubber at the free end by the backing adjustment unit is set between the two gripping parts that are originally not affected by the twisting direction of the backing. It is adjusted to be within the range. Therefore, it is possible to prevent the blade rubber from falling too much at the free end portion and to prevent the blade rubber from being excessively twisted between the gripping portions and the free end portion, so that a wiper blade can be obtained with good wiping performance. . Moreover, since the rigidity of the backing is adjusted only by the connecting member, the shape of the members constituting the backing other than the connecting member is not complicated. Further, the backing is configured to be insertable into the blade rubber from one side in the longitudinal direction. That is, if the backing is inserted in the longitudinal direction with respect to the blade rubber, the backing can be attached to the blade rubber, so that the attaching operation is easy.

  According to the invention described in claim 2, the rigidity of the backing is adjusted such that the range of the predetermined contact angle between the grip portions of the lever is 30 ° to 50 °. That is, the range of the contact angle between the gripping portions is set to 30 ° to 50 ° at which good wiping performance is obtained, and the contact angle at the free end is adjusted between the gripping portions by adjusting the backing rigidity by the adjusting portion. By setting the contact angle range to 30 ° to 50 °, the contact angle with the wiping surface of the blade rubber is adjusted to 30 ° to 50 ° with good wiping performance over the entire longitudinal direction. Accordingly, the wiper blade can obtain better wiping performance over the entire longitudinal direction of the blade rubber.

According to the invention described in claim 3, the backing includes a pair of backing plates having a uniform cross-sectional shape in the longitudinal direction, and each of the backings is positioned in a polymerized state on the side opposite to the wiping portion of the blade rubber. The rigidity of the backing is adjusted by a connecting member that connects both ends of the backing plate. Therefore, adjustment portion (connecting member) can be reduced as much as possible the length portion which does not contribute to the wiping of the wiper blade while maintaining contact angle since the position and polymerized state wiping part of the blade rubber.

  According to the fifth aspect of the present invention, the upper portion of the blade rubber and the lever are covered with the cover member formed to have a length substantially equal to that of the blade rubber. Accordingly, the appearance of the wiper blade is integrated with the cover member, so that the appearance is improved.

  Therefore, according to the present invention, in the wiper blade having a free end portion in which the blade rubber protrudes long in the longitudinal direction from the grip portion of the lever that grips the blade rubber, the blade rubber is prevented from falling too much at the free end portion. Thus, it is possible to provide a wiper blade that can obtain good wiping performance.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.
FIG. 1 shows a wiper blade 1 of the present embodiment for wiping a windshield (windshield glass) 50 of an automobile. The wiper blade 1 is attached to the tip of the wiper arm 2 and receives a pressing force from the wiper arm 2 toward the wiping surface 50a. The wiper arm 2 is rotated by a predetermined angle by a wiper motor (not shown), and the wiper blade 1 wipes a predetermined angle range of the wiping surface 50a of the windshield 50 by the rotation. As shown in FIG. 2, the wiper blade 1 includes a single lever 3, a blade rubber 4, a backing 5, and a cover member 6.

The lever 3 is formed by pressing a metal plate material, and has a holder portion 3a, an arm portion 3b, and a grip portion 3c.
The holder part 3a is located in the center part of the lever 3 in the longitudinal direction, and is provided to be connected to the wiper arm 2 so as to be rotatable. The holder 3a is formed with a rectangular opening 3d for inserting the tip of the wiper arm 2, and is bent so that both side walls are parallel. A connecting pin 3e is rotatably attached to the holder portion 3a through a connecting clip (not shown) and the tip of the wiper arm 2. On both sides of the holder portion 3a in the longitudinal direction, arm portions 3b extending in a substantially plate shape along the longitudinal direction are respectively provided.

  A grip portion 3c that grips the blade rubber 4 is formed at the tip of each arm portion 3b. The grip portion 3c is an intermediate portion between the longitudinal end portion of the blade rubber 4 and the holder portion 3a, more specifically, the longitudinal direction of the arm portion 3b so that the grip portion 3c is located at approximately three equal positions in the longitudinal direction of the blade rubber 4. The length of is set. Further, the grip portion 3c is formed in a substantially U-shape that opens downward when viewed from the longitudinal direction, and the opening ends extend inward from each other and are formed narrow. The grip portion 3 c is inserted from one side in the longitudinal direction into a backing mounting groove 4 c provided in the base portion 4 a of the blade rubber 4 to hold the blade rubber 4.

  The blade rubber 4 is formed in a long shape with a rubber material, and a base portion 4a gripped by each grip portion 3c of the lever 3, and a raindrop on the wiping surface 50a continuously provided downward from the bottom surface of the base portion 4a. And a wiping portion 4b for wiping off the like. The base portion 4 a and the wiping portion 4 b are formed continuously in the longitudinal direction of the blade rubber 4.

  The base 4a is formed with a backing mounting groove 4c for mounting and storing the backing 5 on both side surfaces as viewed from the longitudinal direction. The gripping part 3c of the lever 3 and a later-described gripping part 3c of the lever 3 are formed below the mounting groove 4c. A leading end of the gripper 7 is inserted, and a holding groove 4 d for holding the gripper 3 c and the gripper 7 is formed. The backing mounting groove 4c and the holding groove 4d are formed continuously over substantially the entire longitudinal direction of the blade rubber 4, and are parallel to each other.

  At one end in the longitudinal direction of the base portion 4a, a locking recess 4e that is not continuous with the holding groove 4d is provided on the longitudinal extension line of each holding groove 4d. A locking projection 4f is formed on the upper surface of one end in the longitudinal direction of the base 4a (on the locking recess 4e side). In FIG. 2, only one side surface of the base portion 4a of the blade rubber 4 is shown, so that one backing mounting groove 4c, holding groove 4d and locking recess 4e are shown. On the other hand, as shown in FIG. 2 and FIG. 3A, the wiping portion 4b is located on the base end side and is connected to the base portion 4a and the narrow neck portion 4g, and is located on the tip end side to contact the wiping surface 50a. Thus, the cross section has an inverted triangular shape having a lip portion 4h for wiping raindrops and the like on the wiping surface 50a.

  The backing 5 is a long and thin rectangular plate made of a metal plate having a spring property and having a length substantially the same as the longitudinal length of the backing mounting groove 4c and a cross-sectional shape substantially the same as the depth (width) of the backing mounting groove 4c. It has a pair of backing plate materials 5a that are uniformly formed in a plate shape. That is, the backing plate material 5a is formed in a size that can be accommodated substantially in each backing mounting groove 4c. The backing 5 is configured by arranging a pair of backing plate members 5a parallel to each other with a predetermined interval, and connecting both end portions in the longitudinal direction with connecting members 5b and 5c.

  The connecting member 5b on one end side in the longitudinal direction of the backing 5 is connected to the lower surface of each backing plate member 5a so as to straddle both backing plate members 5a. The connecting member 5 b has an arch shape along the outer surface on the upper side of the blade rubber 4 from the backing mounting groove 4 c of the blade rubber 4. That is, even if connected by the connecting member 5b, the backing 5 can be inserted into the backing mounting groove 4c along the longitudinal direction from the connecting member 5b side. On the other hand, the connecting member 5c on the other end side in the longitudinal direction of the backing 5 is connected to the upper surface of each backing plate member 5a so as to straddle both backing plate members 5a. That is, the connecting member 5c restricts further movement of the blade rubber 4 inserted into the backing 5 in the insertion direction.

  The backing 5 is inserted into the blade rubber 4 along the longitudinal direction from the connecting member 5 b side, and the backing plate material 5 a is accommodated in the backing mounting groove 4 c of the blade rubber 4. The backing 5 is inserted until the connecting member 5b gets over the locking protrusion 4f provided at the end of the blade rubber 4 in the direction opposite to the insertion direction and is locked with the locking protrusion 4f. Complete. When the backing 5 is completely attached to the blade rubber 4, the connecting member 5b on one end side in the longitudinal direction of the backing 5 is arranged in a superposed state on the opposite side to the wiping portion 4b, and one of the base portions 4a of the blade rubber 4 is disposed. The connecting member 5c on the other end side in the longitudinal direction of the backing 5 is located in the notch portion 4j in which the portion is notched from the other end and is disposed in a superposed state on the opposite side to the wiping portion 4b (from the other end of the blade rubber 4) The backing 5 does not protrude in the longitudinal direction).

  In FIG. 2, the backing 5 is linear in order to prevent the drawing from becoming complicated, but in actuality, the curvature (of the wiping surface 50a) is smaller than the curvature of the wiping surface 50a in the natural state (no load state). The central portion in the longitudinal direction has a curved shape that is convex toward the anti-wiping surface 50a side. Thereby, the blade rubber 4 is curved and deformed in accordance with the shape of the backing 5. Further, when a pressing force is applied by the wiper arm 2 during wiping, the blade rubber 4 is elastically deformed in accordance with the curvature of the wiping surface 50a.

  A cover member 6 is provided on the upper portion of the blade rubber 4 so as to cover the upper portion (base portion 4 a) of the blade rubber 4 and the lever 3. The cover member 6 is formed of a rubber material having elasticity equal to or less than that of the blade rubber 4. The reason why such a rubber material is used for the cover member 6 is to prevent the blade rubber 4 from being bent and deformed in accordance with the change in the curvature of the wiping surface 50a. The cover member 6 has a center cover portion 6a and a side cover portion 6b.

  The center cover portion 6 a is located at the center in the longitudinal direction of the cover member 6 and covers the holder portion 3 a of the lever 3 and the vicinity thereof. The center cover portion 6 a is formed with a rectangular opening 6 c for inserting the holder portion 3 a of the lever 3 and inserting the tip end portion of the wiper arm 2. On the other hand, the side cover portion 6b covers the arm portion 3b of the lever 3 from both sides of the center cover portion 6a to both ends of the blade rubber 4 and the upper portion of the blade rubber 4 protruding in the longitudinal direction from the arm portion 3b. A fin 6d that prevents the wiper blade 1 from floating from the wiping surface 50a is integrally formed on the upper surface of the side cover portion 6b.

  The lower surface of the cover member 6 (the surface facing the blade rubber 4) is formed in a shape that is substantially the same as the grip portion 3c of the lever 3, that is, a substantially U-shape that opens downward when viewed from the longitudinal direction. Three grippers 7 each having an opening end extending inward and having a narrow width are fixed to each other in the longitudinal direction of the lever 3 at a predetermined interval.

  The cover member 6 is inserted from above the lever 3 and attached to the lever 3. The lever 3 and the cover member 6 are blades having a backing 5 attached to the gripper 7 and the grip portion 3c. The base portion 4 a of the rubber 4 is inserted from the longitudinal direction, and the leading end portions of the gripper 7 and the grip portion 3 c are inserted into the holding groove 4 d of the blade rubber 4. Thereby, the blade rubber 4 is held by the lever 3 and the cover member 6. Further, in this case, the gripper 7 positioned at the head on the insertion side of the cover member 6 gets over the wall 4i between the holding groove 4d and the locking recess 4e and is fitted into the locking recess 4e. Movement in the longitudinal direction is restricted. In this way, the wiper blade 1 of the present embodiment is assembled.

  The wiper blade 1 according to the present embodiment is configured to protrude from the grip portion 3c of the lever 3 to the outside in the longitudinal direction by a predetermined length, and the blade rubber 4 satisfactorily follows the change in the curvature of the wiping surface 50a. It is a possible structure. Incidentally, a portion on the end side of the blade rubber 4 (including the backing 5) protruding outward in the longitudinal direction from the grip portion 3c of the lever 3 is defined as a free end portion X (see FIG. 1).

  Here, there is a concern that the wiper blade 1 having the structure having the free end portion X as in the present embodiment has a low torsional rigidity at the free end portion X protruding outward in the longitudinal direction from the grip portion 3c of the lever 3. The Further, the free end portion X protrudes from the grip portion 3c of the lever 3 because of its structure, so that it is likely to be twisted, and the degree of twist is particularly large on the tip side. The first reason is that the torsional rigidity of the backing plate 5a itself tends to be insufficient. In particular, as in the case of the wiper blade mentioned in the background art, when the width of the backing is gradually decreased from the central portion in the longitudinal direction toward both end portions, the torsional rigidity is extremely lowered toward the end portions. Secondly, unlike the present embodiment, in the case of the example of FIG. 3B in which the connecting members 5b and 5c are not used, each backing plate 5a moves in the bending direction (plate thickness direction). This is because the deviation increases, and this allows a large twist of the free end X.

  Incidentally, the backing 5 and the blade rubber 4 of the free end portion X appear to be supported by the cover member 6, and it seems that sufficient torsional rigidity is ensured by the cover member 6. The meaning that the cover member 6 is supported with respect to the free end X on the contrary from the material of the member 6 is strong. That is, the sufficient torsional rigidity of the free end X cannot be ensured with the cover member 6 alone.

  In the present embodiment, in order to increase the torsional rigidity of the free end X of the wiper blade 1, the backing plate 5a has the same width in the longitudinal direction and the backing plate 5a has both ends connected by connecting members 5b and 5c. 5 is used. Further, the backing 5 of the present embodiment not only simply increases the torsional rigidity of the free end portion X, but also the wiping surface of the blade rubber 4 at the free end portion X as shown in FIG. The contact angle θ with respect to 50a (the angle formed by the tangent of both members at the contact point between the blade rubber 4 and the wiping surface 50a on the wiping side of the blade rubber 4) is within a predetermined contact angle θ between the gripping portions 3c. Of these, in this case, the rigidity of the backing 5 is determined by using the connecting members 5b and 5c so that the wiping performance is generally 30 ° to 50 ° (30 ° to 50 °). It has been adjusted. In this case, adjustment is made by changing the shape, plate thickness, width dimension, material, and the like of the connecting members 5b and 5c. Thus, the connecting members 5b and 5c reduce the torsional rigidity of the backing 5 and the deviation of the bending direction of each backing plate member 5a, and the torsional rigidity of the free end X of the wiper blade 1 is originally in the torsional direction of the backing 5. It is optimized in the same way as between the two gripping portions 3c that are not easily affected. As a result, the blade rubber 4 is prevented from falling too much at the free end X of the wiper blade 1, and the blade rubber 4 is prevented from being excessively twisted between the gripping portions 3c and the free end X. Good wiping performance can be obtained.

Next, characteristic effects of the present embodiment will be described.
(1) The wiper blade 1 has a free end portion X that freely follows the curve of the wiping surface 50a by causing the blade rubber 4 with the backing 5 mounted thereon to protrude from the grip portion 3c of the lever 3 by a predetermined length in the longitudinal direction. It is composed. The backing 5 is formed to have the same width along the longitudinal direction, and the contact angle θ of the free end X with the wiping surface 50a of the blade rubber 4 is within a predetermined contact angle θ between the gripping portions 3c. In this case, the rigidity of the backing 5 that contributes to the torsional direction of the free end X is adjusted by the connecting members 5b and 5c provided on the backing 5 so that good wiping performance is obtained. Yes. That is, by the connecting members 5b and 5c of the backing 5, the contact angle θ with the wiping surface 50a of the blade rubber 4 at the free end X is set between both gripping portions 3c that are hardly affected by the twisting direction of the backing 5. The wiping performance is adjusted to be within a predetermined contact angle θ range (30 ° to 50 °). Accordingly, it is possible to prevent the blade rubber 4 from falling too much at the free end X, and it is possible to prevent the blade rubber 4 from being excessively twisted between both the gripping portions 3c and the free end X, thereby providing good wiping performance. The resulting wiper blade 1 can be obtained.

  (2) The range of the contact angle θ between the gripping portions 3c of the lever 3 is set to 30 ° -50 ° at which good wiping performance is obtained, and the contact angle θ at the free end X is determined by the connecting members 5b, 5c. By adjusting the rigidity of the backing 5 and setting the contact angle θ range between the gripping portions 3c to 30 ° to 50 °, the contact angle θ with the wiping surface 50a of the blade rubber 4 can be wiped over the entire longitudinal direction. Is adjusted to 30 ° to 50 °. Therefore, the wiper blade 1 can be obtained in which better wiping performance can be obtained over the entire longitudinal direction of the blade rubber 4.

  (3) The backing 5 includes a pair of backing plate members 5a having a uniform cross-sectional shape in the longitudinal direction, and is positioned in a polymerized state on the opposite side of the wiping portion 4b of the blade rubber 4 to each of the backing plate members 5a. The rigidity of the backing 5 is adjusted by connecting members 5b and 5c that connect both ends. Therefore, since the rigidity of the backing 5 is adjusted only by the connecting members 5b and 5c, the shape of the members constituting the backing 5, other than the connecting members 5b and 5c, that is, the backing plate material 5a is not complicated. Further, since the connecting members 5b and 5c are positioned in a superposed state with the wiping portion 4b of the blade rubber 4, the contact angle θ can be maintained and the length portion that does not contribute to the wiping of the wiper blade 1 can be reduced as much as possible.

  (4) The backing 5 is configured to be insertable into the blade rubber 4 from one side in the longitudinal direction (the connecting member 5b side). That is, if the backing 5 is inserted into the blade rubber 4 in the longitudinal direction, the backing 5 can be attached to the blade rubber 4, so that the attaching operation can be facilitated.

  (5) The upper portion of the blade rubber 4 and the lever 3 are covered with a cover member 6 formed to have a length substantially equal to that of the blade rubber 4. Therefore, the appearance shape of the wiper blade 1 becomes an integral shape by the cover member 6, so that the appearance of the appearance can be improved.

In addition, you may change embodiment of this invention as follows.
In the above embodiment , for example, the backing plate 5a is formed wider or thicker at the end in the longitudinal direction than the center in the longitudinal direction.

  In the above embodiment, the cover member 6 having the fins 6d is mounted, but the cover member 6 from which the fins 6d are omitted may be used. Further, the cover member 6 itself may be omitted.

The perspective view of the wiper blade of this embodiment. The disassembled perspective view of the wiper blade of this embodiment. (A) is sectional drawing of the wiper blade of this embodiment, (b) is sectional drawing of the wiper blade at the time of adjusting the rigidity of backing low.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Wiper blade, 2 ... Wiper arm, 3 ... Lever, 3a ... Holder part, 3b ... Arm part, 3c ... Gripping part, 4 ... Blade rubber, 4c ... Backing mounting groove, 5 ... Backing, 5a ... Backing board material, 5b, 5c: a connecting member constituting the adjusting unit, 6: a cover member, 50a: a wiping surface, X: a free end, θ: a contact angle.

Claims (5)

A blade rubber having a wiping portion for wiping the wiping surface;
A backing having a spring property accommodated in a backing mounting groove formed in the longitudinal direction of the blade rubber;
A holder part to which a wiper arm is pivotally connected, an arm part extending from the holder part toward both sides in the longitudinal direction of the blade rubber, and provided at a tip part of the arm part to grip the blade rubber or the backing A lever having a grip portion,
A wiper blade configured with a free end portion that freely protrudes a predetermined length in a longitudinal direction from a gripping portion of the lever to freely follow the curvature of the wiping surface by projecting the blade rubber mounted with the backing,
The backing has a pair of backing plates that are formed to have the same width along the longitudinal direction or wider in the longitudinal direction than the longitudinal center, and a connecting member that connects the ends of the backing plates together. The blade rubber can be inserted from one side in the longitudinal direction ,
The blade rubber is formed with a locking projection for locking the connecting member in a state where the backing is mounted, and when the backing is inserted into the blade rubber, the connecting member gets over the locking projection, The connecting member is configured to be locked to the locking protrusion in a state where the backing is mounted,
The connecting member contributes to the twisting direction of the free end so that the contact angle of the blade rubber with the wiping surface of the free end is within a predetermined range of the contact angle between the gripping portions. wiper blade, wherein the benzalkonium adjust the rigidity of the backing to. The wiper blade according to claim 1,
The wiper blade is characterized in that the rigidity of the backing is adjusted so that the range of the predetermined contact angle between the gripping portions is 30 ° to 50 °. The wiper blade according to claim 1 or 2,
The backing has a pair of backing plate members having a uniform cross-sectional shape in the longitudinal direction,
The connecting member is a wiper blade, wherein the benzalkonium be coupled to each other the ends of the wiping part and the respective backing plate located in the polymerised state on the opposite side of the blade rubber. The wiper blade according to any one of claims 1 to 3,
The connecting member is
A connecting member on the insertion side that connects the two backing plate members in an arch shape straddling both backing plate members on one end side in the longitudinal direction of the backing, and enables insertion from the longitudinal side of the backing to the blade rubber; ,
A regulating-side coupling member that is coupled so as to straddle both backing plate members at the other longitudinal end side of the backing, and regulates the movement of the backing inserted in the blade rubber in the further insertion direction;
Wiper blade, characterized in that it comprises a. In the wiper blade according to any one of claims 1 to 4,
A wiper blade having a length substantially the same as the blade rubber and provided with a cover member that covers an upper portion of the blade rubber and the lever.

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