JP5457275B2 - Wiper blade - Google Patents

Description

  The present invention relates to a wiper blade suitable for wiping a windshield surface of an automobile.

  Conventionally, as a wiper blade of a wiper device provided in a vehicle, a main lever that is connected to a wiper arm, a cover (movable member) that is rotatably connected to both longitudinal ends of the main lever, and a main lever are provided. There is one provided with a blade rubber held by a holding nail (for example, see Patent Document 1). The main lever of the wiper blade is formed in a substantially U shape with a cross section in the longitudinal direction opened downward (wiping surface side). The holding claws are formed on the side closer to each other from the pair of side walls at both ends in the longitudinal direction of the main lever, so that the upper portion of the blade rubber can be gripped. In addition, an upper connecting portion extending downward is provided on the upper wall connecting the pair of side walls at the positions where the holding claws at both ends in the longitudinal direction of the main lever are formed, and the upper connecting portion is inserted into the cover and rotated. A lower connecting portion that is movably connected is provided, and the cover is rotatably connected to the main lever around the connecting portion.

JP 2008-114746 A (refer to FIGS. 8 to 10)

  However, in the wiper blade as described above, the connecting portion between the main lever and the cover is provided at the same position in the longitudinal direction as the holding claw of the main lever, so that the holding claw is an obstacle when the main lever and the cover are assembled. There is a problem that the assembly method is limited and the assembly is complicated. Further, since the connecting portion between the main lever and the cover and the holding portion of the blade rubber by the holding claw have a two-story structure in the blade height direction, there is a problem that the height direction dimension of the wiper blade is increased. .

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a wiper blade that allows easy assembly of the main lever and the movable member while reducing the height of the wiper blade. It is to provide.

In order to solve the above problems, in the invention according to claim 1, a main lever connected to the wiper arm and provided with first holding claws on both ends in the longitudinal direction, and a longitudinal end portion of the main lever A wiper blade including a movable member that is rotatably connected to the first holding claw portion and a blade rubber that is held by the first and second holding claw portions, the main lever is formed in a substantially U-shaped longitudinal orthogonal section becomes a pair of side walls and upper wall connecting them opposite connecting portion between the main lever and the movable member, the pair of side walls of said main lever An upper connecting portion provided to extend downward from the upper wall of the main lever and a lower connecting portion provided to the movable member, and the vertical direction of the lower connecting portion and the upper connecting portion. Along In order to pivotally connected with said upper connecting portion and the lower connecting portion by pairs movement, the upper connecting portion and the lower connecting portion of the main lever in the longitudinal direction outside than the first holding pawl portion and summarized in that provided located between the longitudinal ends and said first holding claw portion.

According to this configuration, the connecting portion (the upper connecting portion and the lower connecting portion) between the main lever and the movable member has a first holding end and a longitudinal end of the main lever that is longer in the longitudinal direction than the first holding claw portion of the main lever. Since it is provided between the claw portions , the first holding claw portion is not obstructed when assembling the main lever and the movable member, and the assembling method is hardly restricted. Therefore, the main lever and the movable member can be easily assembled. In addition, since the blade rubber holding structure by the first holding claw portion of the main lever and the connecting portion between the main lever and the movable member are displaced in the longitudinal direction, the height of the wiper blade can be kept low. .

In the invention described in claim 2, in the wiper blade according to claim 1, the first holding claw portion before SL is that its tip extends downwardly from each of the pair of the side walls is bent to the side approaching each other The bridge portion is configured to be able to grip the blade rubber, and the main lever is connected to the upper surface of the blade rubber by connecting a pair of the side walls at the longitudinal position where the first holding claw portion is provided. This is the summary.

  According to this configuration, the main lever is provided with the bridge portion that connects the pair of side walls and contacts the upper surface of the blade rubber at the longitudinal position where the first holding claw portion is provided. The rigidity of the claw portion is improved (it becomes difficult to open), and the blade rubber can be firmly held. That is, the first holding claw portion that extends downward from the pair of side walls and bends toward the side where the tips approach each other has a low rigidity (easily opens) when the distance from the upper wall is long, for example, and the blade rubber comes off. However, the bridge portion can improve the rigidity and prevent the blade rubber from coming off. As in the prior art, in the case of the two-story structure in which the connecting portion between the main lever and the cover (movable member) is provided at the same position in the longitudinal direction as the holding claw of the main lever, there is a connecting portion. Although it is difficult to provide a bridge portion while keeping the height of the wiper blade low, the connecting portion of this configuration is provided at the end position of the main lever in the longitudinal direction outside the first holding claw portion. Therefore, the bridge portion can be easily provided while keeping the height of the wiper blade low.

The gist of the invention described in claim 3 is that, in the wiper blade according to claim 2, a gap is formed between the bridge portion and the upper wall.
According to this configuration, since a gap is formed between the bridge portion and the upper wall, the weight can be reduced while ensuring the necessary rigidity.

The invention according to claim 4 is the wiper blade according to claim 3, wherein the main lever including the bridge portion is integrally formed of a resin material.
According to this configuration, since the main lever including the bridge portion is integrally formed of a resin material, there is a possibility that sink marks (dents) may occur on the surface of the main lever. Since a gap is formed between them, deformation due to sink marks can be reduced as compared with, for example, a case filled with a resin material without forming a gap.

  According to the present invention, it is possible to provide a wiper blade that allows easy assembly of the main lever and the movable member.

The perspective view which shows the wiper for vehicles in this Embodiment. (A) The front view of the wiper blade of this Embodiment. (B) Front view of the blade rubber. (C) AA sectional view in Drawing 2 (a). (D) BB sectional drawing in Fig.2 (a). (A) The partial expanded sectional view of the wiper blade of this Embodiment. (B) CC sectional drawing in Fig.3 (a). (C) DD sectional drawing in Fig.3 (a). The partial expansion perspective view for demonstrating the upper side connection part of the main lever of this Embodiment. (A) The top view of the movable member of this Embodiment. (B) EE sectional drawing in Fig.5 (a). The elements on larger scale of the wiper blade of this Embodiment. (A) Sectional drawing which looked at one edge part side of the wiper blade of this Embodiment from the downward direction. (B) The same sectional view which looked at the other end side of a wiper blade from the lower part. (A) The partial expanded partial sectional view of the wiper blade of another example. (B) FF sectional drawing in Fig.8 (a). The partial expansion perspective view for demonstrating the upper side connection part of the main lever of another example. The partial expansion perspective view for demonstrating the lower side connection part of the movable member of another example.

Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS.
FIG. 1 shows a vehicle wiper 11 that wipes raindrops and the like adhering to a wiping surface 1a of a windshield (windshield glass) 1 of an automobile. The vehicle wiper 11 includes a wiper arm 12 and a wiper blade 13. The wiper arm 12 is fixed to a pivot shaft (not shown) whose base end is reciprocated at a predetermined angle by a driving force of a wiper motor (not shown), and reciprocally swings as the pivot shaft reciprocates. Do exercise. The wiper blade 13 is connected to the tip of the wiper arm 12 via a connection clip 14 so as to be rotatable. The wiper arm 12 is provided with a spring (not shown) for applying a pressing force for pressing the wiper blade 13 against the wiping surface 1a.

  As shown in FIG. 2, the wiper blade 13 includes a wiper lever 21 and a blade rubber 22. FIG. 2 is a front view of the wiper blade 13 along a plane, specifically, a state in which the wiping surface side end (lower end) of the blade rubber 22 is in contact with the plane.

  The wiper lever 21 includes a main lever 31 whose longitudinal middle portion is rotatably connected to the distal end portion of the wiper arm 12 via a coupling clip 14, and a longitudinal base end portion which is both longitudinal end portions of the main lever 31. 2 (in FIG. 2A, with the axis X as the center) and two movable members 32 that are rotatably connected.

  More specifically, the main lever 31 is made of a resin material, and has a generally U-shaped cross section in the longitudinal direction (opened on the wiping surface 1a side) as a whole. The upper opening 31a (see FIG. 1) penetrating in the vertical direction (perpendicular to the wiping surface 1a) is formed in the portion on the side to be performed. In addition, between the pair of side walls 31b and 31c (see FIGS. 2C and 2D) at positions corresponding to the upper opening 31a of the main lever 31, a metal made to connect the side walls 31b and 31c to each other. A connecting shaft 31d (see FIG. 2A) is provided by insert molding, and the distal end portion of the wiper arm 12 is connected to the connecting shaft 31d via the connecting clip 14 (see FIG. 1).

  A pair of first holding claws 31e projecting toward the wiping surface 1a for holding the blade rubber 22 (the upper portion 22a) are provided on both ends in the longitudinal direction of the main lever 31. The pair of first holding claws 31e are provided at a distance longer in the longitudinal direction than the width in the longitudinal direction of the upper opening 31a (see FIG. 1) (at positions near both ends in the longitudinal direction of the main lever 31). It has been. As shown in FIG. 2C, the first holding claw portion 31e extends downward from the lower edges of the pair of side walls 31b and 31c of the main lever 31, and is bent to the side where the tips approach each other. Thus, the upper portion 22a of the blade rubber 22 can be gripped. Further, at the position where the first holding claw portion 31e is formed in the main lever 31, as shown in FIG. 2 (c), the movement of the blade rubber 22 to the side away from the wiping surface 1a is prevented and the first In order to ensure the rigidity of the holding claw portion 31e, a bridge portion 31f that connects the pair of side walls 31b and 31c and abuts against the upper portion 22a (the upper surface) of the blade rubber 22 is formed. Further, as shown in FIG. 2C, the bridge portion 31f is provided such that a gap S is formed between the pair of side walls 31b and 31c and an upper wall 31g connecting the upper ends.

  Further, at both ends in the longitudinal direction of the main lever 31 and outside the first holding claw 31e in the longitudinal direction, as shown in FIG. 3 and FIG. An upper connection portion 31h is provided so as to extend. As shown in FIGS. 3 and 4, the upper connecting portion 31 h of the present embodiment includes a plate-like plate-like engagement portion 31 i extending downward from the upper wall 31 g along the longitudinal direction of the main lever 31, and The plate-like engagement portion 31i includes a rotation shaft portion 31j that protrudes in the thickness direction (wiping direction and in the left-right direction in FIG. 3C) from the tip in the middle portion in the longitudinal direction. As shown in FIG. 4, the rotation shaft portion 31j of the present embodiment protrudes in a substantially columnar shape, and its lower half protrudes downward from the plate-like engagement portion 31i, and further protrudes. The portion has a tapered shape in which the width in the plate thickness direction becomes narrower as it goes downward.

  Each movable member 32 is made of a resin material, and has a generally U-shaped cross section in the longitudinal direction (opened on the wiping surface 1a side) as a whole, and the base end portion in the longitudinal direction is the longitudinal direction of the main lever 31. It is connected so as to be rotatable around an axis X (see FIG. 2A) inside both ends, and is provided so as to form a continuous appearance (with a small step in the longitudinal direction) with the main lever 31.

  Specifically, as shown in FIGS. 3 and 5, at the base end portion of the movable member 32, an extending portion 32 a that can be disposed in a space surrounded by the pair of side walls 31 b and 31 c and the upper wall 31 g of the main lever 31. Is formed so as to extend along the longitudinal direction, and the extending portion 32 a is disposed outside the first holding claw portion 31 e of the main lever 31 in the longitudinal direction. The extending portion 32a is formed with a concave lower connecting portion 32b in which the upper connecting portion 31h is inserted from above and is rotatably connected (opened upward). The lower connecting portion 32b of the present embodiment is inserted into the plate-like engagement portion 31i so that the plate-like engagement portion 31i and the plate thickness direction (in the wiping direction, in FIG. 3 (b), The plate insertion engagement portion 32c that can be engaged in the left and right direction) and the rotation shaft portion 31j are inserted, and the rotation shaft portion 31j is rotatably supported along the plate thickness direction. And a shaft insertion support portion 32d that is recessed. The shaft insertion support portion 32d of the present embodiment is formed by a lower mold (not shown) for resin-molding the movable member 32, and below the shaft insertion support portion 32d, FIG. As shown in (c) and FIG. 5 (b), a die release hole 32e for passing the lower die is formed. Then, the shaft insertion support portion 32d is configured such that when the rotation shaft portion 31j is inserted, the movable member 32 with respect to the main lever 31 is in contact (sliding contact) with the upper half of the rotation shaft portion 31j. The downward movement (disengagement from the main lever 31) is prevented. Further, the upper surface of the intermediate portion in the longitudinal direction corresponding to the shaft insertion support portion 32d at the bottom 32f of the lower connection portion 32b is rotatably contacted (slidably contacted) with the lower half of the rotation shaft portion 31j. ) And a support surface 32g having a concave cross-sectional arc shape that prevents the movable member 32 from moving upward with respect to the main lever 31 is formed. Thereby, the movable member 32 is connected to the main lever 31 so as to be rotatable about the axis X of the rotation shaft portion 31j. In addition, the connection part 41 which consists of the upper side connection part 31h and the lower side connection part 32b of this Embodiment has the rotating shaft part 31j tapered, and a pair of side wall of the lower side connection part 32b bends. For example, by moving the movable member 32 upward relative to the main lever 31 by adjusting the relative position along the vertical direction by moving the movable member 32 upward with respect to the main lever 31, it can be assembled.

  In the present embodiment, the bottom 32f of the plate insertion engagement portion 32c (lower connection portion 32b) facing the plate engagement portion 31i is connected to the main lever 31 as shown in FIG. In order to allow the rotation of the movable member 32, the inclined surface 32h is inclined so as to be disposed downward as it is separated (in the longitudinal direction) from the shaft insertion support portion 32d. In the inclined surface 32h of the present embodiment, the shaft insertion support portion 32d is formed at the intermediate portion in the longitudinal direction of the lower connection portion 32b (plate insertion engagement portion 32c). It is formed on both sides (in the longitudinal direction).

  Further, as shown in FIGS. 3A and 5, a drain hole 32 i that penetrates downward in the gravitational direction is provided on the bottom 32 f side of the lower connecting portion 32 b in the movable member 32. . Specifically, the drain hole 32i of the present embodiment is provided so as to penetrate downward (wiping surface 1a side) from the bottom 32f of the lower connecting portion 32b. Further, the drain holes 32i are provided corresponding to the lowest positions of the respective inclined surfaces 32h, that is, at both ends in the longitudinal direction of the lower connecting portion 32b.

  Further, as shown in FIGS. 2 (a) and 3 (a), the blade rubber 22 (the upper portion 22a) of the movable member 32 is disposed on the distal end side in the longitudinal direction, as in the first holding claw portion 31e. A second holding claw portion 32j that protrudes toward the wiping surface 1a is provided.

  The blade rubber 22 is formed of a rubber material in an elongated shape, and is held (gripped) by the first holding claw portion 31e and the second holding claw portion 32j, and the lower portion from the upper portion 22a (in the direction of the wiping surface 1a) ) And a wiping portion 22b extending to be tiltable with respect to the upper portion 22a. The upper portion 22a of the blade rubber 22 is formed with a pair of receiving grooves 22c that open laterally along the wiping direction (left and right in FIG. 2C), and each of the receiving grooves 22c has a leaf spring. A flat backing 33 made of a metal plate as a member is mounted (accommodated and held) so that the flat plate surface is parallel to the wiping direction. The backing 33 disperses the pressing force applied to the wiping surface 1a received from the wiper arm 12 in the longitudinal direction, elastically deforms in the direction perpendicular to the wiping surface 1a, and protrudes from the first holding claw portion 31e to both ends in the longitudinal direction. The follow-up end portion 22d (see FIG. 2A) also serves to press the wiping portion 22b against the wiping surface 1a. The first holding claw portion 31e and the second holding claw portion 32j hold the upper portion 22a including the backing 33 (accommodating groove 22c) and prevent the backing 33 from coming off from the accommodating groove 22c at that portion. Also plays.

  Further, in the housing groove 22c of the blade rubber 22 of the present embodiment, a position corresponding to one second holding claw portion 32j (the second holding claw portion 32j in the left movable member 32 in FIG. 2) is shown in FIG. As shown in FIG. 7 (a), an engaging convex portion 22e is formed so as to be convex so as to partially reduce the depth of the accommodating groove 22c. The engaging convex portions 22e are formed so that the longitudinal positions of the pair of receiving grooves 22c are shifted (within the range corresponding to the second holding claw portions 32j). In addition, the backing recess 33 of the present embodiment is formed with an engagement recess 33a in which the engagement projection 22e is fitted at a position corresponding to the engagement projection 22e. This is because the backing 33 is formed in a complicated curved shape as a whole, and the longitudinal direction one end side and the longitudinal direction of the backing 33 depend on whether or not the engaging convex portion 22e fits into the engaging concave portion 33a. This prevents the other end side from being assembled in reverse. Moreover, since the two backings 33 are the same member and one end side and the other end side are suitable, they can be assembled in either of the pair of receiving grooves 22c. A pair is formed on each backing 33. Further, the engaging convex portion 22e and the engaging concave portion 33a are engaged in the longitudinal direction to prevent the backing 33 from moving in the longitudinal direction in the receiving groove 22c. Further, since the engaging convex portion 22e and the engaging concave portion 33a are arranged at positions corresponding to the second holding claw portion 32j engaged between the locking projections 22f and 22g of the blade rubber 22 described later, The movement of the backing 33 in the width direction is directly prevented at a position corresponding to the engaging convex portion 22e and the engaging concave portion 33a, and the engagement convex portion 22e and the engaging concave portion 33a are prevented from being disengaged. Has been. In addition, as shown in FIG. 7B, the housing groove 22c has a position corresponding to the other second holding claw portion 32j (the second holding claw portion 32j in the right movable member 32 in FIG. 2). The engagement convex portion 22 e is not formed, and the engagement concave portion 33 a is not formed at the same position of the backing 33.

  Further, in the blade rubber 22 of the present embodiment, on the both sides in the longitudinal direction at positions corresponding to one second holding claw portion 32j (the second holding claw portion 32j in the left movable member 32 in FIG. 2), As shown in FIG. 6, locking projections 22f and 22g that are engaged with the second holding claw portion 32j in the longitudinal direction are formed. Further, the locking protrusion 22f near the center in the longitudinal direction of the blade rubber 22 is strong in the longitudinal direction with the second holding claw portion 32j in a state where the second holding claw portion 32j can be smoothly slidably assembled in the longitudinal direction. Inclined so as to be engaged (the locking protrusion 22f visible in FIG. 6 is inclined so as to protrude toward the front side of the paper on the left side).

  Also, between the pair of first holding claws 31e in the longitudinal direction of the blade rubber 22 of the present embodiment, as shown in FIGS. The thick portion 22h is formed as a deformation suppressing portion for suppressing deformation. As shown in FIG. 2D, the thick portion 22h is held by the first holding claw portion 31e shown in FIG. (Thickness with respect to a part etc.).

  Further, between the pair of first holding claws 31e in the longitudinal direction of the main lever 31, as shown in FIGS. 2 (a) and 2 (d), a removal preventing projection 31k is provided. The escape prevention protrusion 31k allows movement (vertical movement) in the direction perpendicular to the wiping surface 1a of the blade rubber 22 in the gap K (the space between the upper (upper surface) 22a of the blade rubber 22 and the inner surface of the main lever 31). However, in order to prevent the backing 33 from coming off from the receiving groove 22c on the side (one side wall 31b side) that receives the force (opposite to the starting direction) applied to the blade rubber 22 when starting from the wiper stop position. It protrudes and is provided on the wiping surface 1a side. The wiper stop position is a position along the lower end of the windshield 1 (wiping surface 1a). Further, as shown in FIG. 2 (a), the slip-off prevention protrusion 31k of the present embodiment is a position shifted from the longitudinal center position between the pair of first holding claws 31e, and is a pair of first holding hooks. A plurality (specifically, two at equal intervals from the longitudinal center position) are provided across the longitudinal center position between the claw portions 31e.

  Further, on the front side of the vehicle on the outer surface of the wiper lever 21 (the main lever 31 and the movable member 32) of the present embodiment (the front side in the attached state), the blade rubber 22 is received when the traveling wind during vehicle traveling is received. Fin surfaces 31l and 32k (see FIGS. 2 (c) and 2 (d)) for generating a force to press the wiping surface 1a on the wiping surface 1a side are formed on substantially the entire longitudinal direction. 2 (c), (d) and FIGS. 3 (b), (c), the fin surface 31l of the main lever 31 extends from the side wall 31b on the side opposite to the starting direction to the upper wall 31g. The fin surface 32k of the movable member 32 is formed in a similar manner so as to form a continuous appearance (with few steps in the longitudinal direction) on the fin surface 31l of the main lever 31.

Next, characteristic effects of the above embodiment will be described below.
(1) The connecting portion 41 (the upper connecting portion 31h and the lower connecting portion 32b) between the main lever 31 and the movable member 32 is an end on the outer side in the longitudinal direction of the main lever 31 with respect to the first holding claw portion 31e of the main lever 31. Since the main lever 31 and the movable member 32 are assembled, they are not obstructed by the first holding claw portion 31e, and the assembling method is hardly restricted. Therefore, the main lever 31 and the movable member 32 can be easily assembled. In addition, since the blade rubber 22 holding configuration by the first holding claw portion 31e of the main lever 31 and the connecting portion 41 of the main lever 31 and the movable member 32 are arranged shifted in the longitudinal direction, the height of the wiper blade 13 is increased. Can be kept low. In the present embodiment, the connecting portion 41 between the main lever 31 and the movable member 32 includes an upper connecting portion 31h provided extending downward from the upper wall 31g of the main lever and an upper connecting portion provided on the movable member 32 from above. It consists of the lower side connection part 32b by which the part 31h is inserted and connected rotatably. And since the connection part 41 (the upper connection part 31h and the lower connection part 32b) of the main lever 31 and the movable member 32 can be assembled | attached by the relative movement along an up-down direction, the main lever 31 and a movable member When assembling 32, the first holding claw 31e does not get in the way, and the main lever 31 and the movable member 32 can be easily assembled.

  (2) The main lever 31 is provided with a bridge portion 31f that connects the pair of side walls 31b and 31c and contacts the upper surface of the blade rubber 22 at a longitudinal position where the first holding claw portion 31e is provided. The rigidity of the first holding claw portion 31e is improved (becomes difficult to open), and the blade rubber 22 can be held firmly. That is, the first holding claw portion 31e that extends downward from each of the pair of side walls 31b and 31c and is bent toward the side where the tips approach each other has low rigidity (e.g., easy to open) when the distance is far from the upper wall 31g. ) There is a concern that the blade rubber 22 may come off, but the rigidity is improved by the bridge portion 31f, and the blade rubber 22 can be prevented from coming off. As in the prior art, in the case of a two-story structure in which the connecting portion between the main lever and the movable member is provided at the same position in the longitudinal direction as the holding claw, since there is a connecting portion, the height of the wiper blade 13 is increased. Although it is difficult to provide a bridge portion while keeping it low, the connecting portion 41 of this configuration is provided at the end position on the outer side in the longitudinal direction of the main lever 31 with respect to the first holding claw portion 31e. The bridge portion 31f can be easily provided while keeping the height of 13 low.

(3) Since the gap S is formed between the bridge portion 31f and the upper wall 31g, the weight can be reduced while ensuring the necessary rigidity.
(4) Since the main lever 31 including the bridge portion 31f is integrally formed of a resin material, sink marks (dents) may occur on the surface of the main lever 31, but the bridge portion 31f and the upper wall Since a gap S is formed between the gap 31g, deformation due to sink marks can be reduced as compared with, for example, a gap filled with a resin material without forming the gap S.

  (5) The main lever 31 is formed with a fin surface 31l that is hung from the one side wall 31b to the upper wall 31g and generates a force for pressing the blade rubber 22 toward the wiping surface 1a when receiving the traveling wind. Therefore, the lifting of the blade rubber 22 from the wiping surface 1a is reduced by the fin surface 31l, and the blade rubber 22 can be made to follow the wiping surface 1a satisfactorily to perform a good wiping operation. In such a configuration, in order to form the fin surface 31l, the distance from the upper wall 31g to the first holding claw portion 31e (in the vertical direction) is naturally increased, but the first holding claw is formed by the bridge portion 31f. Since the rigidity of the part 31e is improved (it becomes difficult to open), the blade rubber 22 can be held firmly.

The above embodiment may be modified as follows.
In the embodiment described above, the bottom 32f of the lower connection portion 32b is pivotally abutted (slidably contacted) with the lower half of the rotation shaft portion 31j and is moved upward of the movable member 32 with respect to the main lever 31. However, the present invention is not limited to this, and the same function may be embodied by other configurations.

  For example, you may change as shown in FIGS. Specifically, as shown in FIGS. 8 and 9, at the position corresponding to the rotation shaft portion 31 j on the upper wall 31 g of the main lever 31, there is a support convex portion 31 m slightly protruding downward (along the wiping direction). A pair is formed in the width direction. On the other hand, as shown in FIGS. 8 and 10, in the extended portion 32 a of the movable member 32, the rotation shaft portion 31 j is inserted into the shaft insertion support portion 32 d at a position corresponding to the support convex portion 31 m. An arc-shaped convex arc support convex portion 32 l is formed on the upper side to prevent the movable member 32 from moving upward with respect to the main lever 31 by making contact (sliding contact) with the support convex portion 31 m. Even if it does in this way, while the movable member 32 is rotatably supported with respect to the main lever 31, the effect similar to the effect of the said embodiment can be acquired. In this example (see FIGS. 8 to 10), the bottom 32m of the lower connecting portion 32b is formed so as not to contact (slidably contact) the rotating shaft portion 31j. Further, the bottom 32m in this example does not have the inclined surface 32h of the above embodiment, but is formed in a simple plate shape with a constant vertical plate thickness, and drain holes 32i are formed at both ends in the longitudinal direction. Has been.

  In the above embodiment, the main lever 31 has a bridge portion 31f that connects the pair of side walls 31b and 31c to each other and contacts the upper surface of the blade rubber 22 at a longitudinal position where the first holding claw portion 31e is provided. However, the present invention is not limited to this. For example, the bridge unit 31f may be deleted.

  In the above embodiment, the gap S is formed between the bridge portion 31f and the upper wall 31g. However, the present invention is not limited to this. For example, the gap S is not formed, that is, the upper wall 31g. You may provide the bridge part connected with.

  In the above embodiment, the main lever 31 including the bridge portion 31f is integrally formed of a resin material. However, the present invention is not limited to this. For example, the bridge portion is formed of a separate member. You may provide by adhesion | attachment, insert molding, etc. The first holding claw portion 31e may also be formed by a separate member and provided by adhesion, insert molding, or the like.

  In the above embodiment, although not specifically mentioned, the pair of side walls of the movable member 32 is located at the position where the second holding claw portion 32j is formed in the movable member 32, like the bridge portion 31f of the main lever 31. You may form the bridge part which connects. If it does in this way, the rigidity of the 2nd holding claw part 32j will be improved (it will become difficult to open), and blade rubber 22 can be held firmly. When the second holding claw portion 32j is slid and assembled over the inclined surface of the locking projection 22f as in the above embodiment, the second holding claw portion 32j is opened (interval in the width direction). However, the deformation of the second holding claw portion 32j at this time is suppressed, and the blade rubber 22 is firmly held by the second holding claw portion 32j in the assembled state.

  In the above embodiment, the wiper lever 21 (the main lever 31 and the movable member 32) is formed with the fin surfaces 31l and 32k for generating a force for pressing the blade rubber 22 against the wiping surface 1a when receiving the traveling wind. However, the present invention is not limited to this, and it may be changed to a wiper lever in which the fin surfaces 31l and 32k are not formed.

  In the above embodiment, the drainage hole 32i penetrating to the outside is provided on the bottom 32f side of the concave lower connection portion 32b into which the upper connection portion 31h is inserted and rotatably connected. However, the present invention is not limited to this, and the lower connecting portion 32b (movable member 32) in which the drain hole 32i is not provided may be changed.

  In the above embodiment, the connecting portion 41 includes the upper connecting portion 31h (the plate-like engaging portion 31i and the rotating shaft portion 31j) and the lower connecting portion 32b (the plate inserting engaging portion 32c and the shaft inserting support portion 32d). However, as long as it is provided at the end position on the outer side in the longitudinal direction of the main lever 31 with respect to the first holding claw portion 31e, the connecting portion may have another configuration. For example, a configuration in which there is no plate-like engagement portion 31i and plate insertion engagement portion 32c (that is, a structure in which rattling in the plate thickness direction (in other words, the wiping direction) is restricted) in the above embodiment. You may change to the connection part. Further, for example, the main lever 31 may be provided with a lower connecting portion and the movable member 32 may be provided with an upper connecting portion.

  In the above embodiment, a deformation suppressing portion (thickness portion 22h) for suppressing deformation of the housing groove 22c is provided between the pair of first holding claws 31e in the longitudinal direction of the blade rubber 22. However, it is not limited to this, It is good also as a structure which does not provide a deformation | transformation suppression part, and is good also as a structure provided over the full length of the blade rubber 22. FIG. In addition, the deformation suppressing portion may be configured by forming a portion corresponding to the thick portion 22h as a separate member and retrofitting it by bonding or the like as long as the deformation of the accommodating groove 22c can be suppressed.

  In the above embodiment, the escape prevention protrusion 31k is provided between the pair of first holding claws 31e in the longitudinal direction of the main lever 31 to prevent the backing 33 from coming off from the receiving groove 22c. However, the present invention is not limited to this, and the configuration may be such that the prevention protrusion 31k is not provided.

  In the above embodiment, the wiper lever 21 includes the main lever 31 and the two movable members 32. However, the present invention is not limited to this. For example, even if the movable member 32 is changed to only one wiper lever. Good.

  In the above embodiment, the main lever 31 and the movable member 32 are made of a resin material. However, the present invention is not limited to this. For example, the main lever 31 and the movable member 32 may be made of a metal material, or a part thereof may be made of metal. .

The technical idea that can be grasped from the above embodiments will be described below together with the effects thereof.
(A) In the wiper blade according to any one of claims 2 to 4, the main lever is hung from the side wall to the upper wall, and when the traveling wind is received, the blade rubber is pressed against the wiping surface side. A wiper blade characterized in that a fin surface for generating force is formed.

  According to this configuration, the lift from the wiping surface of the blade rubber is reduced by the fin surface, and the blade rubber can be made to follow the wiping surface well and a good wiping operation can be performed. In such a configuration, the distance from the upper wall to the first holding claw portion naturally increases in order to form the fin surface, but the first holding claw is provided by the configuration (bridge portion) according to claim 2. Since the rigidity of the portion is improved (becomes difficult to open), the blade rubber can be held firmly.

  (B) The wiper blade according to any one of claims 1 to 4 and (a), wherein the connecting portion between the main lever and the movable member is an upper wall of one of the main lever and the movable member. An upper connecting portion that extends downward from the upper lever, and a lower connecting portion that is provided on the other of the main lever and the movable member and is rotatably connected by inserting the upper connecting portion from above. A wiper blade characterized by being assembled by relative movement along the vertical direction.

  According to this configuration, the connecting portion between the main lever and the movable member is provided on the upper connecting portion provided to extend downward from the upper wall of one of the main lever and the movable member, and the other of the main lever and the movable member. An upper connecting part inserted from above and a lower connecting part connected rotatably. And since the connection part (upper connection part and lower connection part) of a main lever and a movable member can be assembled | attached by the relative movement along an up-down direction, when assembling a main lever and a movable member, 1 The holding claw portion does not get in the way, and the main lever and the movable member can be easily assembled.

  DESCRIPTION OF SYMBOLS 12 ... Wiper arm, 22 ... Blade rubber, 31 ... Main lever, 31b, 31c ... A pair of side walls, 31e ... First holding claw part, 31f ... Bridge part, 31g ... Upper wall, 32 ... Movable member, 32j ... Second holding Claw part, 41 ... connecting part, S ... gap.

Claims (4)

A main lever connected to the wiper arm and provided with first holding claws on both ends in the longitudinal direction ;
A movable member rotatably connected to the longitudinal end of the main lever and provided with a second holding claw;
A wiper blade comprising a blade rubber held by the first and second holding claws,
The main lever is formed in a substantially U-shape consisting of a pair of side walls whose longitudinal cross-sections are opposed to each other and an upper wall connecting them.
The connecting portion between the main lever and the movable member includes an upper connecting portion provided to extend downward from the upper wall of the main lever in the pair of side walls of the main lever and a lower portion provided on the movable member. An upper connecting portion for pivotally connecting the lower connecting portion and the upper connecting portion by relative movement along a vertical direction between the lower connecting portion and the upper connecting portion. wiper parts and the lower connecting portion, characterized in that the provided located between the longitudinal end and the first retaining claw portion in the longitudinal direction outside of the main lever than the first holding pawl portion blade. The wiper blade according to claim 1,
First retaining claw portion before SL is capable gripping the blade rubber by its tip extends downwardly from each of the pair of the side walls is bent to the side approaching each other,
The wiper characterized in that the main lever is provided with a bridge portion that connects a pair of the side walls at the position in the longitudinal direction where the first holding claw portion is provided and contacts the upper surface of the blade rubber. blade. The wiper blade according to claim 2,
A wiper blade, wherein a gap is formed between the bridge portion and the upper wall. The wiper blade according to claim 3, wherein
The wiper blade, wherein the main lever including the bridge portion is integrally formed of a resin material.

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