JP2009154706A - Arm stay, wiper arm, and wiper device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve an aerodynamic characteristic of a wiper arm and improve the wipeability of a wiper device for a vehicle. <P>SOLUTION: A wiper arm is provided with an arm head, a retainer connected to the arm head and an arm stay 24 fixed to the retainer and the wiper arm is fixed to a pivot shaft arranged to a vehicle body at the arm head. The arm stay 24 is formed by a rod member crushed and formed into a plate-like shape through pressing of a round rod and further is provided with a main body 24a and a hook 24b formed by bending the extremity end of the main body 24a. The main body 24a of the arm stay 24 is bent in a lateral direction and a downward direction, twisted by a predetermined angle around a bending point, thereby part of it is inclined only by an angle γ within a range of from 20° to 45° in respect to a bending central axis A of the hook part 24b. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle wiper device that is provided on a vehicle such as an automobile and wipes wind glass, and more particularly to the shape of an arm stay that constitutes a wiper arm.

  Vehicles such as passenger cars, buses, and trucks are provided with a wiper device to secure the driver's field of view by wiping rain, snow, splashes from the front car, etc. attached to the windshield (windshield).

  Such a wiper device includes a pivot shaft (wiper shaft) that is swingably supported by the vehicle body, and a wiper arm is attached to the pivot shaft. The wiper arm includes an arm head fixed to the pivot shaft, a retainer connected to the arm head, and an arm stay fixed to the tip of the retainer. The main body portion of the arm stay is formed of a plate-shaped bar, and a U-shaped hook portion is formed by bending at the tip, and a wiper blade is attached to the hook portion. On the other hand, a wiper motor is mounted on the vehicle body, and when the pivot shaft is driven to swing by the wiper motor, the wiper blade swings on the wind glass together with the wiper arm to wipe the glass surface.

  By the way, in a vehicle equipped with such a wiper device, if the wind blows on the wiper arm during vehicle travel, the contact property of the wiper blade to the glass surface, that is, the wiping property of the wiper device may be reduced, which is prevented. Therefore, it is necessary to improve the aerodynamic characteristics of the wiper arm.

For example, in Patent Document 1, a part of the arm stay is twisted with respect to the traveling wind by twisting the arm stay with the longitudinal direction as an axis, thereby flowing below the flow velocity of the wind flowing above the arm stay. A wiper arm is described in which the flow velocity of the wind is increased to generate a pressing force in the direction toward the wind glass on the arm stay.
JP 2006-44305 A

  However, in the wiper device disclosed in Patent Document 1, since the twist angle of the arm stay is small, the projected area of the arm stay with respect to the traveling wind is small, and the force for pressing the wiper arm against the glass surface is not sufficient. For this reason, the wiper blade is lifted from the glass surface, and the wiping property of the wiper device may be lowered.

  On the other hand, if the arm stay is twisted too much, the air resistance applied to the arm stay against the force of pressing the wiper blade against the glass surface becomes too large, and the wiping operation of the wiper device becomes dull and the wiping performance decreases. Become.

  An object of the present invention is to improve aerodynamic characteristics of a wiper arm and improve wiping performance of a vehicle wiper device.

  The arm stay of the present invention includes a main body portion formed of a plate-shaped bar and a hook portion formed by bending the distal end of the main body portion into a U shape, and is fixed to a retainer at the base end of the main body portion. And an arm stay in which a wiper blade is mounted on the hook portion, wherein the main body portion is twisted about the longitudinal direction as an axis, and a part thereof is 20 degrees to 45 degrees with respect to the bending center axis of the hook portion. It is characterized by tilting in the range of degrees.

  The arm stay of the present invention is bent at a predetermined angle α in the width direction and a predetermined angle β in the thin direction at a substantially intermediate portion in the longitudinal direction of the main body portion, and an angle γ inclined with respect to the bending center axis of the hook portion is It is characterized by tilting in the range of 20 degrees to 45 degrees.

  The arm stay of the present invention is characterized in that the main body portion is formed of a plate-like bar material formed by pressing a round bar.

  The wiper arm of the present invention includes an arm head fixed to a pivot shaft on the vehicle body side, a retainer coupled to the arm head, a main body formed by a plate-shaped bar, and a tip of the main body that is U-shaped. A wiper arm that includes a hook portion that is bent to form an arm stay that is fixed to the retainer at a proximal end of the main body portion and to which a wiper blade is attached to the hook portion. The main body is twisted about the longitudinal direction as an axis, and a part of the main body is inclined within a range of 20 to 45 degrees with respect to the bending center axis of the hook.

  The wiper arm of the present invention is bent at a predetermined angle α in the width direction and a predetermined angle β in the thin direction at a substantially middle portion in the longitudinal direction of the main body portion, and an angle γ inclined with respect to the bending center axis of the hook portion is 20 The arm stay that is inclined in the range of 45 degrees to 45 degrees is formed.

  The wiper arm of the present invention is characterized in that the main body portion of the arm stay is formed of a plate-shaped bar formed by pressing a round bar.

  A vehicle wiper device according to the present invention includes a pivot shaft that is swingably provided on a vehicle body and is driven by a wiper motor, a wiper arm that is attached to the pivot shaft, and a wiper blade that is attached to the wiper arm. The wiper arm includes an arm head fixed to the pivot shaft, a retainer coupled to the arm head, a main body formed by a plate-shaped bar, and a U-shaped tip of the main body. And a hook portion to which the wiper arm is attached, and an arm stay fixed to the retainer at a proximal end of the main body portion, the main body portion of the arm stay having a longitudinal direction as an axis It is characterized in that it is twisted and a part thereof is inclined within a range of 20 degrees to 45 degrees with respect to the bending center axis of the hook portion.

  The vehicle wiper device of the present invention is bent at a predetermined angle α in the width direction and a predetermined angle β in the thin direction at a substantially middle portion in the longitudinal direction of the main body portion, and is inclined with respect to the bending center axis of the hook portion. γ forms the arm stay that is inclined in the range of 20 degrees to 45 degrees.

  The vehicle wiper device according to the present invention is characterized in that the main body portion of the arm stay is formed of a plate-shaped bar formed by pressing a round bar.

  According to the present invention, by twisting the main body portion of the arm stay with the longitudinal direction as the axis, a part of the main body portion is inclined in a range of 20 degrees to 45 degrees with respect to the bending center axis of the hook portion. Therefore, the pressing force in the direction toward the wind glass in which the arm stay is generated by receiving the traveling wind can be increased. Thereby, the wiper blade can be prevented from being lifted, and the wiping performance of the vehicle wiper device can be improved. Further, since the air resistance applied to the arm stay does not become too large, it is possible to prevent the wiping operation of the vehicle wiper device from becoming dull due to the traveling wind, and to prevent the wiping performance from being lowered.

  According to the present invention, the arm stay is inclined with respect to the bending center axis of the hook portion by being bent at a predetermined angle α in the width direction and a predetermined angle β in the thin direction at a substantially intermediate portion in the longitudinal direction of the main body portion. The angle γ can be tilted in the range of 20 degrees to 45 degrees.

  Further, the same effect can be obtained by the retainer fixed to the arm stay.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a front view showing a part of a vehicle provided with a vehicle wiper device according to an embodiment of the present invention. In order to wipe a wind glass (windshield) 12 on the vehicle 11, the vehicle Wiper device 13 (hereinafter referred to as wiper device 13) is provided.

  The wiper device 13 is a so-called tandem type equipped with two wiper arms 14 on the driver side and the passenger side, and a pair of pivot shafts (wiper shafts) 16 corresponding to these wiper arms 14 are provided on the vehicle body 15. It is provided so as to be swingable. Each of these pivot shafts 16 is connected to a wiper motor 18 via a link mechanism 17, and is driven by the wiper motor 18 to swing within a predetermined angle range.

  A wiper arm 14 according to an embodiment of the present invention is attached to each pivot shaft 16, and a wiper blade 19 is attached to the tip of each wiper arm 14. Each wiper blade 19 is pressed against the wind glass 12 by the wiper arm 14. When the wiper motor 18 is operated and the pivot shaft 16 is swung, each wiper blade 19 is swung on the wind glass 12 together with the wiper arm 14. The wind glass 12 is wiped off.

  FIG. 2 is a perspective view showing details of the wiper arm shown in FIG. Since the wiper arm 14 on the driver's seat side and the passenger seat side have basically the same structure, only one wiper arm 14 will be described below.

  The wiper arm 14 has an arm head 21 made of aluminum die-cast, and a mounting hole 21a is provided at the base end of the arm head 21. The arm head 21 is pivoted by a nut (not shown) in the mounting hole 21a. 16 is fixed. That is, the wiper arm 14 is fixed to the pivot shaft 16 in the arm head 21.

  A retainer 23 is connected to the tip of the arm head 21 by a connecting shaft 22. The retainer 23 is formed in a U-shaped arm shape with a steel plate or the like, and is rotatable with respect to the arm head 21 in a direction approaching and separating from the wind glass 12 with the connecting shaft 22 as an axis. Although not shown, a spring is accommodated in the retainer 23, one end of the spring is connected to the retainer 23, and the other end is connected to the arm head 21. The retainer 23 is urged toward the wind glass 12 by the spring force of the spring with the connecting shaft 22 as an axis, and the wiper blade 19 is pressed against the wind glass 12 by the wiper arm 14. ing.

  An arm stay 24 is fixed to the tip of the retainer 23.

  FIG. 3 is a perspective view showing details of the arm stay shown in FIG. 2, and an arm stay 24 according to an embodiment of the present invention is formed of a plate-shaped bar, and includes a main body portion 24a, a hook portion 24b, have. As the bar for forming the arm stay 24, a round bar (wire) cut into a predetermined length is crushed by pressing to form a plate, and the material thereof is a metal such as steel. It has become.

  As shown in FIG. 2, the arm stay 24 is fixed to the distal end portion of the retainer 23 by caulking on the proximal end side of the main body portion 24a. A pair of bosses 24c are provided on the surface of the main body 24a, and the arm stays 24 are positioned at predetermined positions with respect to the retainer 23 by engaging these bosses 24c with recesses (not shown) provided in the retainer 23. It has come to be.

  The hook portion 24b is formed integrally with the main body portion 24a by bending the front end of the main body portion 24a into a U shape, and has a predetermined shape determined by the International Organization for Standardization (ISO). The wiper blade 19 is provided with a clip (not shown). When the clip engages with the hook portion 24b, the wiper blade 19 is mounted on the hook portion 24b, that is, the wiper arm 14.

  In the present embodiment, as the arm stay 24, a round bar cut into a predetermined length is crushed by pressing and formed into a plate shape. However, the present invention is not limited to this. A bar material formed by punching a plate material such as the above may be used.

  In the wiper device 13, in order to improve the wiping performance of the wiper device 13 during vehicle travel, that is, the wiping performance of the wiper blade 19, a part of the main body 24 a of the arm stay 24 is set against a traveling wind generated during vehicle travel. The wiper arm 14 is tilted at an angle to generate a pressing force toward the wind glass 12.

  4A is a plan view of the arm stay shown in FIG. 3, FIG. 4B is a front view of the arm stay shown in FIG. 3, and FIG. 5 is a view showing an arrow A in FIG. is there.

  As shown in FIG. 4A, the main body 24a of the arm stay 24 is laterally bent at a substantially intermediate portion in the longitudinal direction, that is, predetermined in the width direction (a direction perpendicular to the longitudinal direction and perpendicular to the thin direction). It is bent by an angle α. Further, as shown in FIG. 4B, the main body 24a is bent downward at a bending point P of the lateral bending, that is, bent by a predetermined angle β toward the side facing the wind glass 12 in the thin direction. Further, the main body 24a is twisted by a predetermined angle with the bending point P as a reference and the longitudinal direction as an axis. As a result, as shown in FIG. 5, the base end side portion of the main body portion 24a with respect to the bending point P is inclined by an angle γ in the range of 25 to 45 degrees with respect to the bending center axis A of the hook portion 24b. ing.

  Here, when the wiper device 13 is stopped and the wiper blade 19 (wiper arm 14) is in the lower reverse position, the bending center axis A of the hook portion 24b is oriented in the same direction as the direction of the traveling wind generated when the vehicle travels. It has become. That is, when the wiper device 13 is stopped, the inclined portion of the main body portion 24a of the arm stay 24 gradually increases from the windward side to the leeward side with respect to the running wind flowing along the wind glass 12 when the vehicle is running. Inclined by an angle γ toward the direction away from the window glass 12.

  When the main body 24a is inclined, the traveling wind flowing on the upper side of the main body 24a (the side not facing the window glass 12) hits the projection surface of the main body 24a and receives resistance. Therefore, the traveling wind flowing on the upper side of the main body portion 24a is slower than the traveling wind flowing on the lower side of the main body portion 24a (the side facing the window glass 12), and the pressure difference between the upper and lower portions of the main body portion 24a by Bernoulli's theorem. The main body portion 24a generates a pressing force in the direction toward the lower side, that is, the window glass 12. Then, the wiper blade 19 is pressed against the wind glass 12 by this pressing force, and the wiping performance of the wiper device 13 during traveling of the vehicle is enhanced. In the present embodiment, the inclination angle γ of the main body portion 24a is set to 35 degrees, and the pressing force generated by the main body portion 24a when receiving the traveling wind and the air resistance that the main body portion 24a receives from the traveling wind. Balance is to be taken.

  In the present embodiment, a part of the main body portion 24a is inclined by 35 degrees with respect to the bending center axis A of the hook portion 24b. However, the present invention is not limited to this, and the inclination angle γ is 20 degrees to It may be in the range of 45 degrees. By setting the inclination angle γ of the main body portion 24a to 20 degrees or more, a sufficient pressing force can be generated on the arm stay 24, and by setting the inclination angle γ of the main body portion 24a to 45 degrees or less, the arm The air resistance applied to the stay 24 does not become too large.

  As described above, in the wiper device 13, the main body 24 a of the arm stay 24 is twisted about the longitudinal direction as an axis, so that a part of the main body 24 a is 20 degrees to 45 degrees with respect to the bending center axis A of the hook 24 b. Since it is made to incline in the range of the degree, the pressing force in the direction toward the window glass 12 generated by the arm stay 24 when the vehicle travels can be increased. Thereby, the wiper blade 19 can be prevented from lifting when the vehicle is traveling, and the wiping performance of the wiper device 13 can be improved.

  Further, in the wiper device 13, since a part of the main body 24a of the arm stay 24 is inclined at an angle of 45 degrees or less with respect to the bending center axis A of the hook portion 24b, air resistance applied to the arm stay 24 is reduced. Does not become too large. Therefore, it is possible to prevent the wiping operation of the wiper device 13 from being dull due to the air resistance that the arm stay 24 receives from the traveling wind during vehicle travel, and to prevent the wiping performance from being deteriorated.

  Furthermore, if a part of the main body part 24a is inclined with respect to the bending center axis A of the hook part 24b only by lateral bending and lower bending, it is necessary to increase the angle of the lower bending. It becomes a shape that is greatly bent into a "<" shape, and the portion of the bending point P protrudes outward with respect to the window glass 12 and hinders the visibility of the driver and the like. On the other hand, in the wiper device 13, since the main body portion 24a is twisted with the longitudinal direction as the axis, the lower bending angle is reduced with respect to the bending center axis A of the hook portion 24b. The main body 24a can be inclined at a predetermined angle. Therefore, the main body portion 24a can be shaped along the window glass 12 having a small “bow” shape, thereby ensuring the driver's field of view.

  It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, in the embodiment described above, the main body portion 24a of the arm stay 24 is twisted about the longitudinal direction as a central axis in addition to lateral bending and downward bending, so that a part of the main body portion 24a is bent at the central axis of the hook portion 24b. However, the present invention is not limited to this, and a part of the main body 24a may be inclined only by lateral bending and torsion, and lateral bending or downward bending is performed. Instead, a part of the main body 24a may be inclined only by twisting.

  In the embodiment, the wiper blade 19 wipes the wind glass 12 of the vehicle 11. However, the present invention is not limited to this. For example, the wiper blade 19 may wipe the rear window glass of the vehicle 11 or the like. Good.

  Furthermore, in the said embodiment, although the wiper apparatus 13 is made into the tandem type, you may apply this invention to other types of wiper apparatuses, such as not only this but a counter wiping type.

1 is a front view showing a part of a vehicle provided with a vehicle wiper device according to an embodiment of the present invention. It is a perspective view which shows the detail of the wiper arm shown in FIG. It is a perspective view which shows the detail of the arm stay shown in FIG. (A) is a top view of the arm stay shown in FIG. 3, (b) is a front view of the arm stay shown in FIG. It is a figure which shows the arrow A in FIG.

Explanation of symbols

11 Vehicle 12 Wind Glass 13 Vehicle Wiper Device 14 Wiper Arm 15 Car Body 16 Pivot Shaft 17 Link Mechanism 18 Wiper Motor 19 Wiper Blade 21 Arm Head 21a Mounting Hole 22 Connecting Shaft 23 Retainer 24 Arm Stay 24a Main Body 24b Hook 24c Boss α, β Predetermined angle P Bending point A Bending center axis

Claims (9)

A main body portion formed of a plate-shaped bar material, and a hook portion formed by bending the distal end of the main body portion into a U-shape, fixed to a retainer at the base end of the main body portion and attached to the hook portion An arm stay to which a wiper blade is attached,
The arm stay is characterized in that the main body portion is twisted about the longitudinal direction as an axis, and a part of the main body portion is inclined within a range of 20 degrees to 45 degrees with respect to a bending center axis of the hook portion.   2. The arm stay according to claim 1, wherein an angle that is bent at a predetermined angle α in the width direction and a predetermined angle β in the thin direction at a substantially intermediate portion in the longitudinal direction of the main body portion and is inclined with respect to a bending center axis of the hook portion. An arm stay characterized in that γ is inclined in the range of 20 degrees to 45 degrees.   The arm stay according to claim 1 or 2, wherein the main body is formed of a plate-shaped bar formed by pressing a round bar. An arm head fixed to a pivot shaft on the vehicle body side, a retainer connected to the arm head, a main body formed by a plate-shaped bar, and a tip of the main body are bent into a U shape. A wiper arm comprising a hook portion and an arm stay fixed to the retainer at a proximal end of the main body portion and mounted with a wiper blade on the hook portion,
The wiper arm according to claim 1, wherein a main body portion of the arm stay is twisted about a longitudinal direction as an axis, and a part thereof is inclined in a range of 20 degrees to 45 degrees with respect to a bending center axis of the hook portion.   5. The wiper arm according to claim 4, wherein an angle γ is bent at a predetermined angle α in the width direction and a predetermined angle β in the thin direction at a substantially intermediate portion in the longitudinal direction of the main body portion, and inclined with respect to the bending center axis of the hook portion. The wiper arm is characterized in that the arm stay inclined at a range of 20 to 45 degrees is formed.   The wiper arm according to claim 4 or 5, wherein the main body portion of the arm stay is formed of a plate-shaped bar formed by pressing a round bar. A vehicle wiper device comprising: a pivot shaft provided swingably on a vehicle body and driven by a wiper motor; a wiper arm attached to the pivot shaft; and a wiper blade attached to the wiper arm;
The wiper arm is
An arm head fixed to the pivot shaft;
A retainer coupled to the arm head;
A main body formed of a plate-shaped bar, and a hook portion formed by bending the front end of the main body into a U shape and to which the wiper arm is mounted, and is fixed to the retainer at the base end of the main body. Arm stays,
The vehicle body wiper characterized in that the main body portion of the arm stay is twisted about the longitudinal direction as an axis, and a part thereof is inclined in a range of 20 degrees to 45 degrees with respect to the bending center axis of the hook portion. apparatus.   8. The vehicle wiper device according to claim 7, wherein the main body portion is bent at a substantially intermediate portion in the longitudinal direction by a predetermined angle α in the width direction and a predetermined angle β in the thin direction, and inclined with respect to a bending center axis of the hook portion. The vehicle wiper device is characterized in that the arm stay is inclined at an angle γ of 20 degrees to 45 degrees.   9. The vehicle wiper device according to claim 7 or 8, wherein the main body portion of the arm stay is formed of a plate-like bar material formed by pressing a round bar.

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