JP7495899B2 - Wiper arm - Google Patents

Description

The present invention relates to a wiper arm.

Vehicles such as passenger cars, buses, and trucks are provided with a wiper device for wiping windows, etc. The wiper device includes a wiper arm that is driven to swing by a motor provided in the vehicle, and a wiper blade that is attached to the tip of the wiper arm.
The wiper arm includes an arm head provided on the vehicle body side, and a retainer rotatably connected to a support shaft of the arm head.

Among wiper arms configured in this way, there is a so-called lock-back type, in which the retainer can be rotated (backed) away from the window when washing the car, etc., and locked in an upright position relative to the window (wiping surface) (see Patent Document 1).

The wiper arm described in Patent Document 1 employs a stopper member that can be selectively attached to the arm head. When attached to the stopper member formed on the arm head, the stopper member described in Patent Document 1 abuts against the base end of the retainer, thereby restricting the retainer from rotating about the support shaft of the arm head in a direction in which the tip end of the retainer moves away from the wiping surface.
The stopper member used in the wiper arm described in Patent Document 1 can be easily attached to the stopper accommodating portion.

JP 2018-016186 A

However, the stopper member used in the wiper arm described in Patent Document 1 was difficult to remove once it was attached to the stopper housing. Therefore, when replacing the wiper blade, the stopper member had to be destroyed to remove the wiper arm. If the stopper member is destroyed, a new stopper member must be prepared, which increases the maintenance costs for the wiper arm.

The present invention aims to provide a wiper arm that can simplify maintenance work and reduce maintenance costs by having a stopper member that can be attached and detached to the stopper housing.

The wiper arm according to one aspect of the present invention comprises an arm head having one end connectable to a pivot shaft and a support shaft at the other end, a retainer having a base end supported by the support shaft so as to be rotatable, a tip end moving around the support shaft in a direction toward and away from the wiping surface, and a wiper blade for wiping the wiping surface attached to the tip end, and a stopper member that restricts rotation of the tip end of the retainer in a first direction away from the wiping surface. The arm head has a stopper accommodating portion formed between the one end and the base end of the retainer and accommodates the stopper member, the stopper accommodating portion has an opening that opens toward the opposite side to the wiping surface and receives the stopper member, and has a recess formed in at least one of the stopper member and the stopper accommodating portion and communicates with the opening, and a step surface formed in the stopper member that communicates with the recess and faces the wiping surface.

The present invention provides a wiper arm that has a stopper member that is detachable from the stopper housing, thereby simplifying maintenance work and reducing maintenance costs.

1 is a perspective view showing a part of a vehicle equipped with a wiper device including a wiper arm according to an embodiment of the present invention; 1 is a perspective view showing a part of a vehicle equipped with a wiper device including a wiper arm according to an embodiment of the present invention; FIG. 3 is a perspective view of the wiper arm according to the embodiment of the present invention, seen from a different direction than that shown in FIG. 2 . 4 is a partial cross-sectional view showing a configuration of a connecting portion between a retainer and an arm head that constitute a wiper arm in an embodiment of the present invention. FIG. 4 is a perspective cross-sectional view showing a configuration of a connecting portion between the retainer and the arm head. FIG. FIG. 2 is a perspective view showing a configuration of the arm head. FIG. 4 is a perspective view showing the stopper member. 8 is a perspective view of the stopper member as viewed from a different direction than that shown in FIG. 7. 5A to 5C are cross-sectional views of a connecting portion between a retainer and an arm head, illustrating a method for removing a stopper member that constitutes a wiper arm in an embodiment of the present invention.

A wiper arm according to an embodiment of the present invention will be described with reference to the drawings. In the embodiments and modified examples described below, the same reference numerals may be used to designate corresponding configurations, and the description may be omitted. In the following description, expressions indicating relative or absolute arrangements, such as "parallel," "orthogonal," "center," and "coaxial," do not only strictly indicate such arrangements, but also indicate a state in which the wiper arm is relatively displaced with a tolerance or an angle or distance that provides the same function.

(Wiper device)
FIG. 1 is a perspective view showing a part of a vehicle equipped with a wiper device 3 including a wiper arm 10 according to an embodiment of the present invention.

1, a wiper device 3 is provided on a window glass (wiping surface) 2 of a vehicle 1, and secures visibility for a driver by wiping off rain, dirt, and the like adhering to the window glass 2. Hereinafter, the window glass 2 may be referred to as the "wiping surface."
The wiper device 3 includes, for example, two wiper arms 10 provided on the driver's seat side and the passenger's seat side, and a wiper blade 4 attached to the tip of each wiper arm 10.

(Wiper blades)
The wiper blade 4 is arranged so as to be pressed against the window glass 2 by a wiper arm 10.
The wiper blade 4 includes a blade holder 4a attached to the tip of the wiper arm 10 and a blade rubber (not shown) held by the blade holder 4a. The wiper blade 4 has a longitudinal direction that is substantially perpendicular to the swing direction of the wiper arm 10.
When the wiper arm 10 is swung by the wiper motor 7, the wiper blade 4 reciprocates within a wiping range 2a on the outer surface of the window glass 2, wiping the window glass 2 with a blade rubber (not shown).

(Wiper arm)
One end of each wiper arm 10 is fixed to a pivot shaft 5. The pivot shaft 5 is supported by the vehicle 1 so as to be rotatable about its central axis. Each pivot shaft 5 is connected via a link mechanism 6 to a wiper motor 7 fixed to the vehicle 1. When the wiper motor 7 is operated, the two pivot shafts 5, 5 rotate synchronously. The wiper arm 10 swings integrally with the pivot shaft 5 within a predetermined range.

Fig. 2 is a perspective view of the wiper arm 10. Fig. 3 is a perspective view of the wiper arm 10 as viewed from a different direction than that of Fig. 2.
As shown in Figures 2 and 3, the wiper arm 10 includes a retainer 12, an arm spring 13 (see Figure 3) that biases the retainer 12 toward the window glass 2, and an arm head 20 connected to the base end 12a of the retainer 12.

The retainer 12 is made of a material such as glass fiber reinforced resin, metal, etc. The retainer 12 extends from a base end 12a to a tip end 12b, and the wiper blade 4 (see FIG. 1) is connected to the tip end 12b.
The retainer 12 has a U-shaped cross section and is integrally provided with a ceiling wall 12c formed to face the window glass 2 (see FIG. 1) and extension walls 12d extending from both sides of the ceiling wall 12c towards the window glass 2.

Fig. 4 is a partial cross-sectional view showing the configuration of the connecting portion between the retainer 12 and the arm head 20 that constitute the wiper arm 10. That is, in Fig. 4, for ease of understanding, the retainer 12 and the arm head 20 are shown in cross section, but the stopper member 40 described below is shown in side view rather than in cross section. Also, in Fig. 4, the area shown by the dashed line shows the side of the stopper member 40 through which the elastic engagement portion 45 can be seen. Fig. 5 is a perspective cross-sectional view showing the configuration of the connecting portion between the retainer 12 and the arm head 20.
4 and 5, a connecting portion 14 for connecting the retainer 12 to the arm head 20 is provided at the base end portion 12a of the retainer 12. The connecting portion 14 is formed to be narrower than the width dimension of the extending wall 12d of the retainer 12, and is formed with a locking hook 14f that is C-shaped in side view and locks onto a support shaft 25 of the arm head 20, which will be described later.

As shown in Figures 2 and 3, the tip 12b of the retainer 12 is formed with a blade engagement portion 17g having an engagement groove 17m with which the blade holder 4a (see Figure 1) of the wiper blade 4 is detachably engaged.

As shown in FIG. 3, on the side of the base end 12a of the retainer 12, a spring locking portion 15 is provided in a portion surrounded by the ceiling wall 12c and the extending walls 12d, 12d.
Further, on the tip end portion 12b side of the retainer 12, a reinforcing rib 16 is integrally formed in a portion surrounded by the ceiling wall 12c and the extending wall 12d.

The arm spring 13 is integrally formed with a coil-shaped spring main body 13a that is expandable and contractable in the longitudinal direction, and spring hook portions 13b, 13c that extend from the spring main body 13a on both sides in the longitudinal direction.
One spring hook portion 13b of the arm spring 13 is engaged with a spring engaging portion 15 formed on the retainer 12. The other spring hook portion 13c is engaged with a spring engaging portion 23 of the arm head 20, which will be described later.

FIG. 6 is a perspective view showing the configuration of the arm head 20. As shown in FIG.
6, the arm head 20 is made of a material such as glass fiber reinforced resin, metal, etc. The arm head 20 includes a shaft connecting portion 21 formed at one end 20a of the arm head 20, a retainer connecting portion 22 formed at the other end 20b, and a spring locking portion 23 and a stopper accommodating portion 30 formed at an intermediate portion 20c between the one end 20a and the other end 20b.

In the shaft connecting portion 21, a shaft insertion hole 21h into which the pivot shaft 5 (see FIG. 1) is inserted is formed penetrating a lower surface 21d on the side facing the window glass 2 and an upper surface 21e on the side away from the window glass 2. The pivot shaft 5 and the shaft insertion hole 21h are subjected to a flat knurling process or the like, and the pivot shaft 5 and the shaft insertion hole 21h are engaged with each other so as not to rotate.
As a result, the arm head 20 and the retainer 12 connected to the arm head 20 , i.e., the wiper arm 10 , rotate integrally with the pivot shaft 5 .

The arm head 20 is formed with a pair of side walls 20w that extend parallel to each other from the shaft connection portion 21 side toward the other end 20b side. The retainer connection portion 22 has a substantially cylindrical support shaft 25 that connects the pair of side walls 20w. As shown in FIG. 3, the connection portion 14 of the retainer 12 is inserted between the pair of side walls 20w. As shown in FIG. 4 and FIG. 5, the locking hook 14f formed on the connection portion 14 is rotatably connected to the support shaft 25. This allows the retainer 12 to rotate around the support shaft 25 in a direction toward and away from the surface of the window glass 2.

The spring locking portion 23 includes a block portion 27 that protrudes from each of the pair of side wall portions 20w toward the inside of the side wall portions 20w, and a locking pin 28 provided between the block portions 27.
As shown in FIGS. 3 and 5, the spring hook portion 13c of the arm spring 13 is housed between the block portions 27, 27 and is engaged with a locking pin .

As shown in FIG. 6, the arm head 20 has a rising wall portion 20v formed on the other end 20b side of the shaft connecting portion 21, which protrudes away from the window glass 2 beyond the upper surface 21e of the shaft connecting portion 21.

The stopper accommodating portion 30 is formed in an opening portion provided between a pair of side wall portions 20w on the other end portion 20b side of the arm head 20 with respect to the rising wall portion 20v. The stopper accommodating portion 30 has an opening portion 36 that opens toward the opposite side to the wiping surface. The opening portion 36 receives a stopper member 40, which will be described later.
The stopper accommodating portion 30 has a flat portion 31, an inclined surface 32 (see Figures 4 and 5), an engagement step portion (engaged portion) 33, a guide groove 34 (guide portion, posture regulating portion), and abutment portion (posture regulating portion) 35.

As shown in FIGS. 4 to 6, the flat portion 31 is formed on the other end portion 20b side of the rising wall portion 20v, and is formed in a flat shape substantially parallel to the central axis direction of the shaft insertion hole 21h.
The inclined surface 32 is formed continuously with the flat surface portion 31 on a side closer to the window glass 2. The inclined surface 32 is inclined from the lower end of the flat surface portion 31 toward the shaft insertion hole 21h as it approaches the window glass 2.
In side view, an engagement step 33 that protrudes towards the support shaft 25 is formed at the boundary between the flat surface 31 and the inclined surface 32 that are formed in a V-shape.

The guide groove 34 is formed on the inner surfaces of the pair of side wall portions 20w. The guide groove 34 is formed from the upper end portion 20t on the side farther from the window glass 2 toward the lower end portion 20s approaching the window glass 2. The guide groove 34 is formed with groove inner surfaces 34a, 34b on which the distance in the longitudinal direction of the retainer 12 connecting the one end portion 20a and the other end portion 20b of the side wall portion 20w gradually decreases from the upper end portion 20t toward the lower end portion 20s, and with a groove inner surface 34c which forms the lower end of the guide groove 34.
An abutment portion 35 is formed on the surface of the block portions 27, 27 on the side of the one end portion 20a. The abutment portion 35 faces the upper end portion 20t of the side wall portion 20w. The abutment portion 35 has a role of maintaining the posture of a stopper member 40 described later.

As shown in Figures 4 and 5, a stopper member 40 that restricts the rotation angle of the retainer 12 around the support shaft 25 can be selectively attached to the stopper housing portion 30 of the arm head 20. In other words, the stopper member 40 can be attached to and detached from the stopper housing portion 30.

Fig. 7 is a perspective view of the stopper member 40 as viewed from the side of the retainer 12. Fig. 8 is a perspective view of the stopper member 40 as viewed from the opposite side to the retainer 12.
As shown in Figures 7 and 8, the stopper member 40 integrally comprises a stopper base 41 that is stored in the stopper accommodating portion 30, and a rotation regulating portion 42 that protrudes from the stopper base 41 toward the side opposite the window glass 2.
The stopper member 40 is formed from a material, such as a resin material, that has a lower rigidity and elastic modulus than the retainer 12. The stopper member 40 restricts rotation in a direction away from the wiping surface at the tip portion 12b of the retainer 12. Hereinafter, the direction away from the wiping surface at the tip portion 12b of the retainer 12 may be referred to as a "first direction."

In the following description of the stopper member 40, the direction connecting the pair of side wall portions 20w (direction along the support shaft 25) when the stopper member 40 is attached to the stopper accommodating portion 30 may be referred to as the "width direction", the direction in which the stopper member 40 is inserted into the stopper accommodating portion 30 (direction connecting the upper end portion 20t and the lower end portion 20s of the arm head 20) may be referred to as the "up-down direction", and the direction connecting one end portion 20a and the other end portion 20b of the arm head 20 when the stopper member 40 is attached to the stopper accommodating portion 30 (direction perpendicular to the direction along the support shaft 25 and the first direction) may be referred to as the "front-rear direction".

The stopper base 41 is sandwiched between the stopper accommodating portion 30 in the width direction and the front-rear direction.
As shown in Figures 7 and 8, the stopper base 41 includes a pair of legs 43 extending in the vertical direction and spaced apart in the width direction, a base portion 44 that is bridged between the pair of legs 43 and has a rotation regulating portion 42 provided thereon, and an elastic engagement portion 45 that is suspended from the base portion 44.

The leg 43 has a leg base 43a and a guide protrusion 43b that protrudes outward in the width direction from the leg base 43a. The lower end of the leg base 43a faces the abutment portion 35 in the front-to-rear direction. The guide protrusion 43b is located at the outermost position in the width direction of the stopper member 40. The length of the guide protrusion 43b in the front-to-rear direction gradually decreases downward.

The base portion 44 is provided at the upper end of the guide protrusion 43b. When the retainer 12 rotates around the support shaft 25 and the tip end 12b of the retainer 12 is displaced in a direction away from the window glass 2, the base end 12a of the retainer 12 abuts against the base portion 44, thereby restricting the displacement of the retainer 12 in the upright direction.

The pair of legs 43 and the base 44 form an arch. By forming this arch, the stopper member 40 can avoid the arm spring 13 of the wiper arm 10. Also, by forming this arch, a space for the spring hook portion 13c to bend can be secured.

The elastic engagement portion 45 is elastically deformable in a direction toward and away from an engagement step portion (engaged portion) 33 formed in the stopper accommodating portion 30 , and engages with the engagement step portion 33 .
As shown in Figure 8, the elastic engagement portion 45 includes a biasing member 45a that elastically deforms in the direction toward and away from the engagement step portion 33, and an engagement member 45b that protrudes in an arc shape from the lower end of the biasing member 45a toward one end portion 20a and engages with the engagement step portion 33.

The biasing member 45a is provided parallel to the leg portion 43. The upper end of the biasing member 45a is a fixed end fixed to the lower end of the base portion 44, and the lower end of the biasing member 45a is a free end, forming a cantilever shape. The biasing member 45a has a smaller second moment of area than the leg portion 43, and the lower end (free end) of the biasing member 45a separated from the base portion 44 elastically deforms in the front-rear direction with the upper end (fixed end) of the biasing member 45a as the center.
As shown in FIGS. 4 and 5 , when the stopper member 40 is attached to the stopper accommodating portion 30 , the engaging member 45 b fits into the engaging step portion 33 .

The rotation restricting portion 42 is abutted against by the base end 12a of the retainer 12 during rotation in the first direction. The rotation restricting portion 42 includes a pair of standing portions 46 that rise from the base portion 44 and are spaced apart in the width direction, and a bridging portion 47 that spans the ends of the pair of standing portions 46 on the opposite side from the base portion 44.

The standing portion 46 is provided on the inside of both side surfaces in the width direction of the stopper base 41. The standing portion 46 has a protrusion 46a that protrudes from the surface facing outward in the width direction of the stopper base 41. The protrusion 46a is provided linearly along the front-rear direction.

The bridge portion 47 is provided on the other end 20 b side of the arm head 20 in the front-rear direction of the rotation restricting portion 42 when the stopper member 40 is attached to the stopper accommodating portion 30 .
A recess 48 is provided on one end 20a side of the arm head 20 in the front-rear direction of the rotation restricting portion 42. The recess 48 is formed by one standing portion 46 and a bridging portion 47. The recess 48 has an opening portion 49 that opens upward. In this embodiment, when the stopper member 40 is attached to the stopper accommodating portion 30, the recess 48 communicates with the opening 36.

A step surface 47a is provided at the lower end of the bridge portion 47, which communicates with the recess 48 and faces the wiping surface. A stopper hole 50 that opens in the front-rear direction is provided below the step surface 47a. The stopper hole 50 communicates with the open portion 49 of the recess 48. When the stopper member 40 is attached to the stopper accommodating portion 30, the step surface 47a and the stopper hole 50 communicate with the opening 36.

(Action and Effect)
Next, a method for accommodating the stopper member 40 in the stopper accommodating portion 30 will be described.
4 and 5, when the engaging member 45b formed on the elastic engaging portion 45 of the stopper member 40 climbs over the engaging step portion 33 of the stopper accommodating portion 30, the engaging member 45b enters below the engaging step portion 33, and the urging member 45a is restored in the front-rear direction toward the one end portion 20a of the arm head 20. By engaging the engaging member 45b with the engaging step portion 33, the stopper member 40 is locked and prevented from slipping out of the stopper accommodating portion 30.

When the stopper member 40 is attached to the stopper housing 30, the retainer 12 rotates around the support shaft 25. When the tip end 12b of the retainer 12 attempts to displace in a direction away from the window glass 2, the base end 12a of the retainer 12 abuts against the upper surface of the base portion 44. This restricts the displacement of the retainer 12 in the upright direction, resulting in a lock-back type wiper arm 10.

Next, a method for removing the stopper member 40 from the stopper housing portion 30 will be described with reference to FIG. 9. FIG. 9 is a cross-sectional view showing the configuration of the connecting portion between the retainer 12 and the arm head 20, illustrating the method for removing the stopper member 40 from the stopper housing portion 30.

As shown in FIG. 9, the tip of the tool 100 is inserted into the opening 36. Then, the tip of the tool 100 is inserted from the open portion 49 below the step surface 47a, and the tool 100 is hooked onto the edge of the step surface (the lower end of the bridge portion 47). Then, the tool 100 is pressed against the upper end of the rising wall portion 20v. With the tool 100 hooked onto the edge of the step surface, the upper end of the rising wall portion 20v becomes a fulcrum, and the stopper member 40 can be removed from the stopper accommodating portion 30 by the principle of leverage. In this embodiment, the tool 100 is a flathead screwdriver, but is not limited to this. The tool 100 may be any rod-shaped member that can be inserted into the opening 36 and the open portion 49.

In this embodiment, the stopper member 40 of the wiper arm 10 has a recess 48 that communicates with the opening 36, and a step surface 47a that is formed in the stopper member 40, communicates with the recess 48, and faces the wiping surface. According to this embodiment, when the tool 100 is inserted from the opening 36 through the recess 48 to the step surface 47a and then hooked onto the step surface 47a and lifted upward, the stopper member 40 can be removed from the stopper accommodating portion 30 by the principle of leverage without destroying the stopper member 40. In addition, the stopper member 40 removed from the stopper accommodating portion 30 can be reattached to the stopper accommodating portion 30 through the opening 36.

The stopper member 40 can be reused, which reduces manufacturing costs and energy consumption. This makes it possible to contribute to Goal 7 of the United Nations-led Sustainable Development Goals (SDGs), "Ensure access to affordable, reliable, sustainable and modern energy for all," and Goal 14, "Ensure sustainable consumption and production patterns."

According to this embodiment, since the stopper member 40 is detachable from the stopper housing portion 30, it is possible to provide a wiper arm 10 that can simplify maintenance work and reduce maintenance costs.

In this embodiment, the stopper member 40 has a stopper base 41 and a rotation regulating portion 42, and the rotation regulating portion 42 has a pair of standing portions 46 spaced apart in the width direction, and a bridging portion 47 that spans the pair of standing portions 46 and has a step surface 47a.
According to this embodiment, when the tool 100 is inserted into the recess 48 and the tool 100 is hooked onto the lower end of the bridge portion 47 and lifted in the first direction, the stopper member 40 can be removed from the stopper accommodating portion 30 by the principle of leverage without destroying the stopper member 40. In addition, the stopper member 40 removed from the stopper accommodating portion 30 can be reattached to the stopper accommodating portion 30 through the opening 36.

In this embodiment, the pair of standing portions 46 are provided inside both widthwise side surfaces of the stopper base 41, so a gap is created between the stopper accommodating portion 30 and the pair of standing portions 46. The stopper member 40 can be removed from the stopper accommodating portion 30 by inserting a tool such as pliers (not shown) into this gap to pinch the outside of the standing portions 46 and lift them upward. In addition, the stopper member 40 removed from the stopper accommodating portion 30 can be reattached to the stopper accommodating portion 30 through the opening 36.

According to this embodiment, the rising portion 46 has a protrusion 46a, so that a tool 200 (not shown) such as pliers can be hooked onto the protrusion 46a. This makes it easy to remove the stopper member 40 from the stopper accommodating portion 30 using the tool 200 such as pliers.

In this embodiment, the stopper member 40 has an elastic engagement portion 45. This embodiment can prevent the stopper member 40 from easily coming off the stopper accommodating portion 30.

According to this embodiment, the engaging member 45b is urged by the urging member 45a toward the rising wall portion 20v and the engaging step portion 33, so that while the stopper member 40 is being inserted into the stopper accommodating portion 30, the engaging member 45b is pushed back against the spring force of the urging member 45a. When the stopper member 40 is inserted into the stopper accommodating portion 30 to a predetermined position, the engaging member 45b is engaged with the engaging step portion 33 by the urging force of the urging member 45a (snap-fit fixed). Therefore, the stopper member 40 can be attached to the stopper accommodating portion 30 simply by inserting the stopper member 40 into the stopper accommodating portion 30.
In this embodiment, since the engaging member 45b protrudes in an arc shape, the stopper member 40 can be removed from the stopper accommodating portion 30 without damaging the stopper accommodating portion 30. The same applies when attaching the stopper member 40 to the stopper accommodating portion 30.

Other Embodiments
Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments. Addition, omission, substitution, and other modifications of the configuration are possible without departing from the spirit of the present invention. The present invention is not limited by the above description, but is limited only by the scope of the attached claims.

In this embodiment, the configuration in which the recess 48 is formed in the stopper member 40 has been described, but this is not limited thereto. The recess 48 may be configured so that the opening 36 and the step surface 47a are in communication with each other. For example, the recess 48 may be provided in the flat surface portion 31 of the stopper accommodating portion 30. In this case, the stopper member 40 may be provided with a stopper hole 50 that opens in the front-rear direction below the step surface 47a that faces the wiping surface, and the tool 100 may be allowed to enter the stopper hole 50 from the recess 48. With this configuration, it is possible to obtain the same effect as in this embodiment.

In this embodiment, the stopper base 41 is sandwiched between the stopper accommodating portion 30 in the width direction and the front-rear direction, but this is not limited to the above. It is sufficient that the stopper base 41 is sandwiched between the stopper accommodating portion 30 at least in the width direction.

In the present embodiment, the protrusion 46a is described as being linearly provided along the front-rear direction, but is not limited thereto. The protrusion 46a may be configured to protrude from a surface facing outward in the width direction of the stopper base 41 and to hook a tool such as pliers.
Furthermore, the protrusions 46a may be configured to generate frictional resistance against a tool such as pliers when the stopper member 40 is removed with the tool. For example, the protrusions 46a may be provided with projections and recesses to roughen the surface facing outward in the width direction of the stopper base 41. For example, the protrusions 46a may be provided with an elastic member having a high friction coefficient.

In this embodiment, the engaging member 45b is described as being configured in an arc shape, but this is not limited to this. The engaging member 45b may have any shape as long as it does not damage the arm head 20.

1...vehicle, 2...window glass (wiping surface), 2a...wiping range, 3...wiper device, 4...wiper blade, 4a...blade holder, 5...pivot shaft, 6...link mechanism, 7...wiper motor, 10...wiper arm, 12...retainer, 12a...base end, 12b...tip end, 12c...ceiling wall, 12d...extension wall, 13...arm spring, 13a...spring main body, 13b...spring hook portion, 13c...spring hook portion, 14...connection portion, 14f...locking hook, 15...spring locking portion, 16...reinforcing rib, 17g...blade engagement portion, 17m...engagement groove, 20...arm head, 20a...one end, 20b...other end, 20c...middle portion, 20s...lower end, 20t...upper end, 20v...wall portion, 20w...side wall portion, 21 ...shaft connecting portion, 21d...lower surface, 21e...upper surface, 21h...shaft insertion hole, 22...retainer connecting portion, 23...spring locking portion, 25...support shaft, 27...block portion, 28...locking pin, 30...stopper accommodating portion, 31...flat portion, 32...inclined surface, 33...engaging step portion (engaged portion), 34...guide groove, 34a...groove inner surface, 34b...groove inner surface, 34c...groove inner surface, 35...contact portion (attitude rule control part), 36...opening, 40...stopper member, 41...stopper base, 42...rotation restriction part, 43...leg, 43a...leg base, 43b...guide protrusion, 44...base part, 45...elastic engagement part, 45a...urging member, 45b...engagement member, 46...standing part, 46a...projection, 47...bridge part, 47a...step surface, 48...recess, 49...opening part, 50...stopper hole, 100...tool

Claims (6)

an arm head having one end connectable to the pivot shaft and the other end provided with a support shaft;
a retainer having a base end supported by the support shaft so as to be freely rotatable, a tip end moving about the support shaft in a direction toward and away from the surface to be wiped, and a wiper blade for wiping the surface to be wiped being attached to the tip end;
a stopper member that restricts rotation of the tip portion of the retainer in a first direction away from the wiping surface,
the arm head has a stopper accommodating portion formed between the one end and the base end of the retainer, and in which the stopper member is accommodated;
the stopper accommodating portion has an opening that opens toward an opposite side to the wiping surface and receives the stopper member,
a recess formed in at least one of the stopper member and the stopper accommodating portion and communicating with the opening;
a step surface formed on the stopper member, the step surface communicating with the recess and facing the wiping surface;
A wiper arm comprising: The stopper member is
a stopper base portion that is sandwiched in the stopper accommodating portion in a support shaft direction along the support shaft and in a direction perpendicular to the support shaft direction and the first direction;
a rotation restricting portion that protrudes from the stopper base portion toward an opposite side to the wiping surface and against which the base end portion of the retainer abuts when the retainer rotates in a first direction,
The rotation restriction portion is
A pair of standing portions spaced apart in the support shaft direction;
The wiper arm according to claim 1 , further comprising: a bridging portion that is bridged between the pair of upright portions and has the step surface. The wiper arm according to claim 2, characterized in that the pair of upright portions are provided inside both side surfaces of the stopper base in the support shaft direction. The wiper arm according to claim 2 or 3, characterized in that the pair of upright portions have a protrusion protruding from a surface facing outward in the support shaft direction. A wiper arm according to any one of claims 1 to 4,
The stopper member is elastically deformable in a direction toward and away from an engaged portion formed in the stopper accommodating portion, and has an elastic engaging portion that engages with the engaged portion. The stopper member is
a stopper base portion that is sandwiched in the stopper accommodating portion in a support shaft direction along the support shaft and in a direction perpendicular to the support shaft direction and the first direction;
a rotation restricting portion that protrudes from the stopper base portion toward an opposite side to the wiping surface and against which the base end portion of the retainer abuts when the retainer rotates in a first direction,
The stopper base is
A pair of legs extending in a normal direction of the wiping surface and spaced apart in the support shaft direction;
a base portion that is bridged across the pair of legs and on which the rotation restricting portion is provided,
The elastic engagement portion is
a biasing member that is vertically disposed from the base portion and elastically deforms in a direction toward and away from the engaged portion;
an engaging member that protrudes from a lower end of the biasing member toward the one end and engages with the engaged portion;
6. The wiper arm according to claim 5, further comprising:

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