JP2008068833A - Wiper arm and vehicular wiper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wiper arm capable of making appearance performance excellent by suppressing the generation of wrinkles and distortion at a bent part set on an intermediate part. <P>SOLUTION: Fold-back parts 12d, 12e formed into flat plate shapes by folding back side walls 12b, 12c are formed on the upper wall 12a side of the tip of a retainer 12 so as to fix an arm piece 13, and notches 12f, 12g as distortion absorbing parts for absorbing distortion generated on the folded-back side walls 12b, 12c at the formation of the bent part or at the formation of the fold-back part are formed on a portion set with the bent part A at the fold-back parts 12d, 12e. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a wiper arm of a vehicle wiper having a structure in which a bent portion is set at an intermediate portion so that a wiper blade is brought into contact with the wiper surface in a suitable state.

  In vehicles such as automobiles, the curved shape of the wiping surface of the windshield (windshield glass) is complicated, and the position of the pivot shaft and the orientation of the pivot shaft with respect to the wiping surface are becoming more diversified. Therefore, a wiper arm used in such a vehicle is provided with a two-dimensional or three-dimensional bent portion in a flat plate portion on the arm tip side in order to make the wiper blade contact in a suitable state on the wiping surface. There is something that is.

Many of the wiper arms are fixed to an arm head fixed to a pivot shaft, a retainer having a U-shaped cross section that is pivotally connected to the arm head and opens downward (wiping surface side), and a distal end portion of the retainer. It is comprised from the elongate flat arm piece for supporting a wiper blade. For example, as shown in Patent Document 1, the bent portion is set on the distal end side of a flat arm piece.
JP 55-29686 A

  By the way, in the fixed part of the retainer tip and the arm piece, each side wall is folded back toward the inner side of the upper wall of the retainer and drawn into a flat plate (saging process), and the upper wall of the retainer tip The arm and the side wall are fixed so as to hold both sides of the arm piece.

  In recent wiper arms, the retainer has a long length, while the arm piece has a short length, and the portion exposed from the retainer tip of the arm piece tends to be short. When setting the above-mentioned bending part to such a wiper arm, there is a demand to set to a retainer tip part (fixed part with an arm piece) processed into a flat plate shape.

  Also, because of the tendency to lengthen the retainer, the side wall portion is folded back to the upper wall portion of the retainer tip, processed into a flat plate shape, and the portion corresponding to the arm piece is formed integrally with the retainer, and the wiper is wiped at the retainer tip. A wiper arm having a configuration in which the blade is directly supported and the arm piece is omitted has also been proposed. In such a wiper arm, when the above-described bent portion is similarly set, it is necessary to set the tip of the retainer processed into a flat plate shape.

  However, if a bent portion is set in the flat plate portion at the tip of the retainer, distortion due to bending occurs between the upper wall portion side and the folded side wall portion side, and the bent portion, particularly the bent portion on the folded side wall portion side. In this case, wrinkles, sink marks, etc. are generated and the appearance performance of the wiper arm is deteriorated. In particular, when the surface of the wiper arm is coated, the coating layer is easily peeled off and the appearance is further deteriorated.

  The present invention has been made in order to solve the above-mentioned problems, and its purpose is to suppress the occurrence of wrinkles and sink marks in the bent portion where the bent portion is set in the middle portion, and to improve the appearance performance. It is an object of the present invention to provide a wiper arm that can be provided and a vehicle wiper including the wiper arm.

  In order to solve the above-mentioned problem, the invention according to claim 1 is characterized in that a U-shaped retainer having an upper wall portion and a pair of side wall portions is rotatable on an arm head fixed to a pivot shaft of a vehicle. The arm piece is attached to the tip of the retainer at a folded portion formed by folding the side wall portion toward the upper wall portion so as to hold an arm piece having a mounting portion for attaching a wiper blade. A wiper arm that is fixed and has a bent portion set to bend the longitudinal axis of the arm piece in a predetermined direction at the folded portion of the retainer tip, A strain absorbing portion that absorbs strain generated in the folded side wall portion when the bent portion is formed or when the folded portion is formed is formed in a portion where the bent portion is set. It and its gist is.

  In the present invention, a folded portion that is flattened by folding the side wall portion is formed on the upper wall portion side of the retainer tip to fix the arm piece, and the bent portion is set at a portion where the bent portion is set in the folded portion. When forming or forming the folded portion, a strain absorbing portion that absorbs strain generated in the folded side wall portion is formed. In other words, by providing a strain absorbing portion and separating the folded portion with the strain absorbing portion interposed therebetween, strain at the time of forming the bent portion itself, or a side wall portion on one side in the longitudinal direction and a side wall on the other side in the longitudinal direction with respect to the strain absorbing portion The distortion when the part is folded back to the strain absorbing part side. Thereby, the appearance performance of the wiper arm is excellent.

  According to a second aspect of the present invention, a U-shaped retainer having an upper wall portion and a pair of side wall portions is rotatably connected to an arm head fixed to a pivot shaft of a vehicle, and a distal end portion of the retainer The side wall portion is folded on the upper wall portion side to form a flat plate-like folded portion, and a mounting portion for mounting a wiper blade on the tip of the folded portion is provided integrally with the retainer. A wiper arm in which a bent portion formed to bend the longitudinal axis of the retainer in a predetermined direction is set at the folded portion, wherein the bent portion in the folded portion is set at a portion The gist of the present invention is that a strain absorbing portion that absorbs strain generated in the folded side wall portion is formed when the bent portion is formed or when the folded portion is formed.

  In this invention, in order to form a mounting portion for mounting the wiper blade, a folded portion having a flat plate shape is formed by folding the side wall portion on the upper wall portion side of the tip of the retainer, and a bent portion is set in the folded portion. A strain absorbing portion that absorbs strain generated in the folded side wall portion when the bent portion is formed or when the folded portion is formed is formed at the portion. In other words, by providing a strain absorbing portion and separating the folded portion with the strain absorbing portion interposed therebetween, strain at the time of forming the bent portion itself, or a side wall portion on one side in the longitudinal direction and a side wall on the other side in the longitudinal direction with respect to the strain absorbing portion The distortion when the part is folded back to the strain absorbing part side. Thereby, the appearance performance of the wiper arm is excellent.

  According to a third aspect of the present invention, in the wiper arm according to the first or second aspect, the strain absorbing portion is cut out so that the folded side wall portion of the portion where the bent portion is set is cut to the vicinity of the upper wall portion. The gist is that it is a notch.

In the present invention, the folded portion itself of the bent portion, where wrinkles and sink marks are likely to occur, is cut out to form the strain absorbing portion, so that occurrence of wrinkles and sink marks at the bent portion of the wiper arm can be suppressed.
The gist of the invention according to claim 4 is that, in the wiper arm according to claim 3, the notch is notched to a location that is flush with the surface of the folded portion.

  In this invention, the cutout portion is cut out to a location that is flush with the surface of the folded portion, so that the folded portion and the cutout portion have a continuous shape with no irregularities when the retainer tip is viewed from the side. . This also improves the appearance performance.

  According to a fifth aspect of the present invention, in the wiper arm according to the third or fourth aspect, a part of the folded-back portion is omitted from the cutout portion toward the tip end portion in the vehicle-mounted side in the state of being attached to the vehicle. The gist of this is.

  In the present invention, the folded portion is partially omitted from the notch portion toward the tip end portion in the state of being attached to the vehicle. For example, the notched portion of the omitted portion is flush with the surface of the folded portion. Notched to the point. In other words, since the appearance of the folded part tends to affect the appearance, the notch is extended to prevent this, and the extended notch is flush with the surface of the folded part as described above. The appearance from the driver in the room is also improved.

  According to a sixth aspect of the present invention, in the wiper arm according to any one of the third to fifth aspects, the cutout portion is cut out to the folded portion when viewed from the folded portion side. The gist.

  In the present invention, the cutout portion is cut out to the folded portion when viewed from the folded portion side, so that the upper wall portion and the folded portion are prevented from overlapping (facing). Thereby, generation | occurrence | production of the wrinkles, sink marks, etc. in a bending part is suppressed more reliably.

  According to a seventh aspect of the present invention, in the wiper arm according to any one of the third to sixth aspects, the bent portion is formed by bending in the plate plane direction of the retainer that is formed into the arm piece or the flat plate shape. The gist of the present invention is to have a lateral bending portion and a longitudinal bending portion formed by bending in a direction intersecting the plate plane at the same location.

  In this invention, since the horizontal bending part and the vertical bending part of the retainer made into an arm piece or a flat plate shape are formed at the same place, the number of bending parts can be reduced, and the number of notch parts formed accordingly. Therefore, it is possible to reduce the number of notches where there is a concern about the decrease in rigidity as much as possible, and to suppress the decrease in rigidity of the wiper arm.

  According to an eighth aspect of the present invention, in the wiper arm according to any one of the third to seventh aspects, the bending portion is set at a plurality of locations, and the notch portion includes a plurality of the bending portions. The gist of each is set.

  In the present invention, since the notch is set in each of the plurality of bent portions, each bend can be handled with a small notch, and the size of the notch that is liable to decrease in rigidity is minimized. Thus, it is possible to suppress a decrease in the rigidity of the wiper arm.

  The gist of the invention described in claim 9 is that the wiper arm according to any one of claims 1 to 8 is mounted with a wiper blade for wiping the wiping surface. To do.

  In this invention, since the wiper arm according to any one of claims 1 to 8 is used, it is possible to provide a vehicle wiper having excellent appearance performance.

  Therefore, according to the above-described invention, there is provided a wiper arm that can suppress generation of wrinkles, sink marks, and the like at the bent portion in which the bent portion is set at the intermediate portion, and can have excellent appearance performance, and the wiper arm. A vehicle wiper can be provided.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.
FIG.1 and FIG.2 shows the wiper 1 for vehicles of this Embodiment. The wiper 1 of the present embodiment is connected to a wiper arm 4 whose base end is fixed to a pivot shaft 2 provided in the vicinity of the lower end of a windshield 3 of the vehicle, and to the distal end of the wiper arm 4 so as to be rotatable. And a wiper blade 5. The wiper 1 is reciprocally swung by a pivot shaft 2 reciprocally rotated by a wiper motor (not shown), and the wiper blade 5 wipes the wiping surface 3 a of the windshield 3.

  The wiper arm 4 includes an arm head 11, a retainer 12 whose base end portion is rotatably connected to the arm head 11, and an arm piece 13 fixed to the distal end portion of the retainer 12.

  The arm head 11 has a fixing hole 11a for fixing to the pivot shaft 2 at the base end portion, and the distal end portion of the pivot shaft 2 is inserted into the fixing hole 11a and fixed by tightening with a nut (not shown). Thus, it is fixed so as to rotate together with the pivot shaft 2. A connecting portion 11 b for connecting to the retainer 12 is configured at the distal end portion of the arm head 11.

  The retainer 12 has a U-shaped cross section in which a lower portion (wiping surface 3a side) having an upper wall portion 12a and a pair of side wall portions 12b and 12c extending downward from both sides of the upper wall portion 12a is opened. The taper shape is formed toward the tip. At the base end portion of the retainer 12, the connecting portion 11b of the arm head 11 is inserted between the side wall portions 12b and 12c, and the connecting pin 14 is mounted between the side wall portions 12b and 12c so as to pass through the connecting portion 11b. Thus, the arm head 11 is pivotally connected to the connecting portion 11b.

  A coil-shaped biasing spring 15 is accommodated between the side wall portions 12 b and 12 c at the base end portion of the retainer 12, and the biasing spring 15 is located between the retainer 12 and the connecting portion 11 b of the arm head 11. Assembled in a compressed state. The biasing spring 15 biases the tip of the wiper arm 4 toward the wiping surface 3a with the urging force as a fulcrum, that is, presses the wiper blade 5 against the wiping surface 3a.

  At the front end of the retainer 12, as shown in FIG. 3, the side wall portions 12b and 12c are turned back toward the inner side surface of the upper wall portion 12a to be turned back portions 12d and 12e for fixing the arm piece 13. Yes. Here, the arm piece 13 is formed of a plate material having a long flat plate shape, and a base end portion is a fixing portion 13 a for fixing to the retainer 12 from a central portion in the longitudinal direction. Incidentally, the length in the longitudinal direction of the fixed portion 13a is set slightly longer than the length in the same direction of the folded portions 12d and 12e of the retainer 12. The folded portions 12d and 12e are cross-sectioned in FIG. 3 so that both sides of the fixed portion 13a of the arm piece 13 are held by the upper wall portion 12a by drawing (saging processing). As shown in the figure, the arm piece 13 is fixed to the tip of the retainer 12 in a flat plate shape.

  Each of the folded portions 12d and 12e has notches 12f and 12g as strain absorbing portions that are notched from the end edge toward the upper wall portion 12a at a portion near the tip of the retainer 12. The proximal end portions sandwiching the notches 12f and 12g are formed as proximal end folded portions 12d1 and 12e1, and the distal end portions are formed as distal folded portions 12d2 and 12e2. And the bending part A of the wiper arm 4 is set in the notch parts 12f and 12g between these base end folding parts 12d1 and 12e1 and the tip folding parts 12d2 and 12e2. In the present embodiment, the bent portions A are individually bent before assembling the tip portions of the arm piece 13 and the retainer 12, and are connected to each other after the respective bending. The bending portion A is a portion that is bent two-dimensionally or three-dimensionally depending on the vehicle type (each wiping surface) in order to bring the wiper blade 5 into contact with the wiping surface 3a in a suitable state.

  Incidentally, in the arm piece 13 of the present embodiment, as shown in FIGS. 4A and 4B, the distal end side (hook portion 13 side) intersects the plate plane direction of the fixed portion 13a with respect to the fixed portion 13a. The leading end side is bent by θ1 in the direction (wiping surface 3a side) (vertical bending portion), and the leading end side is bent by θ2 also in the plate plane direction of the fixing portion 13a (lateral bending portion). Further, as shown in the side view of FIG. 4A, the notches 12f and 12g are cut out to the lower surface of the arm piece 13, as shown in the bottom view of FIG. 4B. In addition, the notches 12 f and 12 g are notched corresponding to the width of the arm piece 13.

  Further, as shown in FIG. 4C, before the side wall portions 12b and 12c (folded portions 12d and 12e) of the retainer 12 are folded back, the cutout portions 12f and 12g are trapezoidal and have the same shape as each other. I am doing. In the notches 12f and 12g, the opening angle θ3 from the center of the bottom to both opening ends is set to be twice or more the bending angle θ2 in the plane direction. That is, at the time of forming the bent portion A, in the present embodiment located outside the bending direction, the opposing end portions of the proximal end folded portion 12d1 and the distal end folded portion 12d2 are prevented from overlapping each other.

  In this way, the notches 12f and 12g are provided in the bent portion A, and the folded portions 12d and 12e are divided into the proximal folded portions 12d1 and 12e1 and the distal folded portions 12d2 and 12e2, so that the upper wall portion 12a side and the folded portion are provided. The distortion caused by the bending between the 12d and 12e sides escapes to the notches 12f and 12g and is absorbed. In addition, the folded portions 12d and 12e themselves of the bent portion A, in which wrinkles and sink marks are likely to occur, are notched into the notched portions 12f and 12g, so that wrinkles and sink marks at the bent portion A of the arm piece 13 are obtained. Generation is suppressed, and the appearance performance of the wiper arm 4 is improved.

  By setting the bent portion A at the distal end portion of the retainer 12, the portion of the arm piece 13 that protrudes from the distal end portion of the retainer 12 is linear. A U-shaped hook portion 13 b that is connected to the wiper blade 5 and supports the blade 5 is formed at the distal end portion of the arm piece 13 by bending. The hook portion 13b is detachably attached to a holder (not shown) connected to the wiper blade 5, and is prevented from being detached from the holder by a lock member 6 attached to the holder.

  The lock member 6 is mounted so as to cover the protruding portion of the arm piece 13 from the tip of the retainer 12 and eliminates a step at the tip of the retainer 12 (a step at the boundary between the retainer 12 and the arm piece 13). It also has a function. That is, since the projecting portion of the arm piece 13 from the distal end portion of the retainer 12 is linear, the existing linear lock member 6 can be used. Thereby, in the front-end | tip part of the wiper arm 4, the outer surface of the retainer 12 continues without a level | step difference with the lock member 6 from the front-end | tip part of the retainer 12 to the wiper blade 5, It becomes a structure which improves an external appearance performance also. Yes.

Next, characteristic actions and effects of the present embodiment will be described.
(1) In the present embodiment, folded-back portions 12d and 12e are formed on the upper wall portion 12a side of the retainer 12 in order to fix the arm piece 13 by folding the side wall portions 12b and 12c into a flat plate shape. Strain absorption that absorbs distortion generated in the folded side wall portions 12b and 12c when the bent portion A is formed or when the folded portions 12d and 12e are formed at the portion where the bent portion A is set in the portions 12d and 12e. Cutout portions 12f and 12g are formed as portions. In other words, the notched portions 12f and 12g are provided, and the bent portions A themselves are separated by separating the folded portions 12d and 12e from the proximal folded portions 12d1 and 12e1 and the distal folded portions 12d2 and 12e2 with the notched portions 12f and 12g interposed therebetween. The distortion at the time of forming or the distortion when the side wall parts 12b, 12c on both sides in the longitudinal direction sandwiching the notches 12f, 12g escape to the notches 12f, 12g. Thereby, the external appearance performance of the wiper arm 4 and the external appearance performance of the vehicle wiper 1 can be made excellent.

  Incidentally, as the bending angle θ2 in the plane direction at the bending portion A becomes larger, such as 30 ° or more, defects such as wrinkles and sink marks due to bending formation become more prominent. Therefore, the bending angle θ2 becomes larger than 30 °. The significance of applying to a wiper arm that needs to be set is great.

  (2) In the present embodiment, the folded portions 12d and 12e of the bent portion A, where wrinkles and sink marks are likely to occur, are cut out to form the notched portions 12f and 12g. The occurrence of wrinkles and sink marks can be suppressed, and the appearance performance of the wiper arm 4 can be improved.

  (3) In the present embodiment, the cutout portions 12f and 12g are cut out to a location that is flush with the surface (lower surface) of the armpiece 13 on the folded-back portions 12d and 12e side. Therefore, the notches 12f and 12g coincide with the surface of the armpiece 13 on the side of the folded portions 12d and 12e when the tip of the retainer 12 is viewed from the side, and the level difference between the notched portions 12d and 12e and the surface of the armpiece 13 on the side of the folded portions 12d and 12e. There can be no continuous shape. This also improves the appearance performance of the wiper arm 4.

  (4) In the present embodiment, the cutout portions 12f and 12g are cut out to the turn-back portions as viewed from the turn-up portions 12d and 12e, that is, cut out by an amount corresponding to the width of the arm piece 13. Therefore, it is possible to prevent the upper wall portion 12a and the folded portions 12d and 12e from overlapping (facing each other). Thereby, generation | occurrence | production of the wrinkles, sink marks, etc. in the bending part A can be suppressed more reliably.

  (5) In the present embodiment, since the horizontal bending portion and the vertical bending portion of the retainer 12 having the arm piece 13 or the flat plate shape are formed in the bending portion A at the same place, the number of the bending portions A is reduced. Accordingly, the number of notches 12f and 12g can be reduced. Therefore, the number of the notches 12f and 12g, which are concerned about the decrease in rigidity, can be reduced as much as possible to suppress the decrease in rigidity of the wiper arm 4.

The embodiment of the present invention may be modified as follows.
In the cutout portions 12f and 12g of the above embodiment, the armpiece 13 is cut out to a location that is flush with the surface (lower surface) on the folded-back portions 12d and 12e side. As indicated by the dotted line X, for example, the cutout portions 12f and 12g may be cut out to a location that is flush with the surfaces (lower surfaces) of the folded portions 12d and 12e. As a result, the folded portions 12d and 12e and the notches 12f and 12g have a continuous shape with no irregularities when the tip of the retainer 12 is viewed from the side, and the appearance performance of the wiper arm 4 can also be improved.

  In the cutout portions 12f and 12g of the above-described embodiment, the folded portions are cut out as viewed from the folded-back portions 12d and 12e, that is, the cut-out portions corresponding to the width of the arm piece 13 are cut. It may be slightly smaller than the width of the piece 13.

  In the above embodiment, the base end folding portions 12d1 and 12e1 and the tip folding portions 12d2 and 12e2 are provided on both sides of the notches 12f and 12g, respectively. However, as shown in FIG. For example, if the line of sight from the driver is in the direction of arrow B, the interior of the vehicle in the state of being attached to the vehicle is partially omitted from the notch portion 12f toward the tip portion. The portions 12d and 12e are notched up to a location that is flush with the surface (lower surface) of the portions 12d and 12e, or are notched up to a location that is flush with the surface (lower surface) of the armpiece 13 on the folded portion 12d and 12e side. That is, since the folded portions 12d and 12e are liable to affect the external shape, in order to prevent this, a part of the folded-back portion 12d2 is omitted to extend the cutout portion 12f, and the extended cutout portion 12f is provided. As described above, by making it flush with the surface (lower surface) of the folded portions 12d and 12e or flush with the surface (lower surface) of the armpiece 13 on the folded portions 12d and 12e side, it looks good from the driver in the passenger compartment. Can also be improved.

  In the above embodiment, the notches 12f and 12g are provided in a small range in the vicinity of the bent portion A. For example, the notches 12f and 12g are provided on both sides of the bent portion A as shown in FIG. May be. In this case, also in the notches 12f and 12g shown in FIG. 6, the notch is cut out to a place that is flush with the surface (lower surface) of the folded portions 12d and 12e, or the surface of the arm piece 13 on the folded portions 12d and 12e side. It is preferable to have a shape that is notched to a location that is flush with the (lower surface).

  In the above embodiment, the bending portion A and the cutout portions 12f and 12g are only one, but the bending portion is provided at a plurality of locations, and the cutout portions are arranged at a plurality of locations or a plurality of locations according to the bending portions. It is good also considering a notch part as one place in a bending part. For example, as shown in FIG. 7, a plurality of (in this case, two) bent portions A1 and A2 are set, and one cutout portion 12f and 12g is set for the plurality of bent portions A1 and A2. Thereby, compared with the case where notched portions are provided in each of the plurality of bent portions A1 and A2, by providing the plurality of bent portions A1 and A2 in one notched portion 12f and 12g, the appearance can be improved. Elimination of complexity during folding of the folded portions 12d and 12e can be expected. On the other hand, if a notch is set in each of the bent portions A1 and A2, each of the bent portions A1 and A2 can be dealt with with a small notch, and the size of the notch that is liable to decrease in rigidity is set as much as possible. It is possible to reduce the rigidity of the wiper arm 4 and reduce the rigidity.

In the above embodiment, the notches 12f and 12g have a trapezoidal shape or a rectangular shape, but may have other shapes such as a triangular shape or a semicircular shape.
In the above embodiment, the mounting portion of the wiper arm 4 for mounting the wiper blade 5 is the U-shaped hook portion 13b, but the shape of the mounting portion is not limited to this, and may be, for example, linear.

  In the above embodiment, the arm piece 13 having the attachment portion (hook portion 13b) with the wiper blade 5 is fixed to the distal end portion of the retainer 12. However, as shown in FIG. An attachment portion with the wiper blade 5, for example, a U-shaped hook portion 12 x may be provided integrally with the portion. Even if it does in this way, it has an effect similar to the said embodiment.

It is the perspective view seen from the upper surface side of the wiper for vehicles in this embodiment. It is the perspective view seen from the bottom face side of a wiper arm. It is an expansion perspective view of a wiper arm tip part. (A) is a side view of the tip of the wiper arm, (b) is a bottom view of the tip of the wiper arm, and (c) is a development view of the tip of the retainer. It is an expansion perspective view of the wiper arm tip part in another example. It is an expansion perspective view of the wiper arm tip part in another example. It is an expansion perspective view of the wiper arm tip part in another example. It is an expansion perspective view of the wiper arm tip part in another example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 2 ... Pivot shaft, 3a ... Wiping surface, 4 ... Wiper arm, 5 ... Wiper blade, 11 ... Arm head, 12 ... Retainer, 12a ... Upper wall part, 12b, 12c ... Side wall part, 12d, 12e ... Folding part, 12d1, 12e1 ... proximal end folding part constituting the folding part, 12d2, 12e2 ... tip folding part constituting the folding part, 12f, 12g ... notch part as strain absorbing part, 12x ... hook part as mounting part, 13 ... arm Piece, 13b ... Hook as mounting part, A, A1, A2 ... Bending part.

Claims (9)

A retainer having a U-shaped cross section having an upper wall portion and a pair of side wall portions is rotatably connected to an arm head fixed to a pivot shaft of a vehicle, and an arm piece having a mounting portion for mounting a wiper blade is provided. The arm piece is fixed to the distal end portion of the retainer by a folded portion that is folded into a flat plate shape by folding the side wall portion toward the upper wall portion so as to be held, and the folded portion at the distal end portion of the retainer A wiper arm in which a bending portion formed to bend the longitudinal axis of the arm piece in a predetermined direction is set,
A strain absorbing portion that absorbs strain generated in the folded side wall portion when the bent portion is formed or when the folded portion is formed is formed at a portion of the folded portion where the bent portion is set. A wiper arm characterized by A U-shaped retainer having an upper wall portion and a pair of side wall portions is rotatably connected to an arm head fixed to the pivot shaft of the vehicle, and the distal end portion of the retainer is connected to the upper wall portion side. A folded portion that is flattened by folding the side wall portion is formed, and a mounting portion for mounting a wiper blade at the tip of the folded portion is provided integrally with the retainer. A wiper arm in which a bent portion formed to bend the longitudinal axis of the retainer in a predetermined direction is set,
A strain absorbing portion that absorbs strain generated in the folded side wall portion when the bent portion is formed or when the folded portion is formed is formed at a portion of the folded portion where the bent portion is set. A wiper arm characterized by The wiper arm according to claim 1 or 2,
The wiper arm according to claim 1, wherein the strain absorbing portion is a notched portion in which the folded side wall portion of the portion where the bent portion is set is notched to the vicinity of the upper wall portion. The wiper arm according to claim 3,
The wiper arm, wherein the cutout portion is cut out to a location that is flush with the surface of the folded portion. The wiper arm according to claim 3 or 4,
The wiper arm according to claim 1, wherein a part of the folded-back portion is omitted from the cutout portion toward the tip end portion in a state of being attached to the vehicle. The wiper arm according to any one of claims 3 to 5,
The wiper arm according to claim 1, wherein the cut-out portion is cut out to a turn-back portion when viewed from the turn-up portion side. The wiper arm according to any one of claims 3 to 6,
The bending portion is the same as a lateral bending portion formed by bending in the plate plane direction of the arm piece or the plate-like retainer and a vertical bending portion formed by bending in a direction intersecting the plate plane. A wiper arm characterized by having at a location. The wiper arm according to any one of claims 3 to 7,
The bent portion is set at a plurality of locations,
The wiper arm, wherein the notch is set in each of the plurality of bent portions.   A wiper for a vehicle, comprising a wiper blade for wiping the wiping surface attached to the mounting portion of the wiper arm according to any one of claims 1 to 8.

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