JP5007958B2 - Wiper arm - Google Patents

Description

  The present invention relates to a wiper that wipes the surface of a front window glass, a rear window glass, a mirror, or lamps of a vehicle (including automobiles, ships, trains, etc.), and more particularly, to a wiper arm.

  Conventionally, for example, a vehicle such as an automobile is provided with a wiper for wiping the surface of the windshield glass in order to ensure visibility when rainwater or the like falls on the surface of the windshield glass (for example, Japanese Patent Laid-Open 9-193750).

  FIG. 8 is an external view schematically showing such a conventional vehicle wiper arm. The vehicle wiper arm 100 includes an arm head 110 having an arm head base end 111 fixed to a slidable drive shaft (not shown) mounted on a drive motor fixed to the vehicle body, and a wiper blade ( And a retainer 130 having a blade attachment portion 131 for attaching a blade attachment portion (not shown).

  In the retainer 130, the retainer base end portion 132 of the retainer 130 is pivotally supported by the rivet 120 at the arm head distal end portion 112 of the arm head 110 so that the retainer 130 can be tilted about the rivet 120. ing. By raising the retainer 130, the user can easily attach the wiper blade to the blade attachment portion 131 of the retainer 130 when the user replaces the wiper blade (not shown).

  FIG. 9 is a cross-sectional view schematically showing a shaft support portion of a conventional vehicle wiper arm. The cross section of the retainer base end portion 132 of the retainer 130 has a U shape, and the arm head distal end portion 112 of the arm head 110 enters the U shape of the retainer 130. Further, a through hole 133 is provided on the side surface of the retainer base end portion 132 of the retainer 130. Also, the arm head tip 112 of the arm head 110 is provided with a through hole 113 on the side surface at the same position. By inserting the connecting shaft 121 of the rivet 120 into the through-hole 133 and the through-hole 113 from the outside and penetrating the rivet 120 from the outside, the retainer 130 is axially moved with respect to the arm head 110 around the connecting shaft 121 of the rivet 120. be able to.

  In addition, in order to smoothly perform the axial movement of the retainer 130, there is a type in which a dry lubricating film 140 is provided on the entire circumference of the through hole 113 of the arm head 110. Further, the wiper arm is provided with a spring (not shown) that joins the arm head 110 and the retainer 130. The spring is provided on the inner side (vehicle inner side) of the arm head 110 and the retainer 130. In the shaft support portion shown in FIG. 9, a spring groove 117 is provided on the inner side of the arm head so that the spring does not interfere with the arm head. It has been.

  Various techniques have been proposed for the wiper arm to wipe the surface of the window glass efficiently. For example, in Patent Document 1, a rivet carries a fixed head and a wiper arm fixed to a wiper shaft. A simple configuration is provided that includes a rotating head that is rotatable with respect to a fixed head, and that allows the wiper to be tilted up and down by integrally coupling both heads.

Further, in Patent Document 2, a guide rib that guides water droplets attached to the side surface of the retainer is provided in a connection portion that engages a connection shaft provided in the arm head and a connection hole provided in the retainer. There is provided a technique for preventing the intrusion of the rotating part and preventing the rotating part from freezing in a low temperature environment to obtain good wiping performance.
Japanese Utility Model Publication No.59-110260 JP 2005-193786 A

  However, as shown in FIGS. 8 and 9, since the rivet 120 is inserted from the side surface of the retainer 130, a protrusion-like shape is generated in the wiper arm, and there is a problem that the appearance of the wiper arm is impaired.

  In addition, since the rivet 120 has a protruding shape, raindrops after rain remain on the protrusion of the rivet 120 due to surface tension, and there is a problem that the corrosion resistance performance of the rivet 120 and the hinge portion around the rivet 120 is remarkably deteriorated. It was.

  The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a wiper arm that has good aesthetics and excellent corrosion resistance by eliminating the rivet that pivotally supports the arm head and the retainer.

  In order to solve the above-mentioned problems, a wiper arm according to the present invention is a wiper arm comprising: an arm head whose base end side is pivotally supported by a drive shaft; and a retainer to which a wiper blade is mounted on the distal end side. A shaft support provided to protrude inwardly on the side wall of the arm, an arm head cover fitted and fixed to the other end of the arm head, and the arm head cover fitted and fixed to the other end of the arm head And a bearing portion for bearing the shaft support portion of the retainer.

  According to this configuration, the shaft support portion of the retainer can be supported by the bearing portion formed by fitting and fixing the arm head cover to the other end of the arm head, and the retainer can be pivoted so that it can be tilted. In addition, since the shaft support portion of the retainer is provided so as to protrude to the inside of the retainer, the bearing portion including the arm head and the arm head cover is covered with the end portion of the retainer, so that the bearing is provided on the outer appearance of the retainer and the arm head. It is possible to provide a wiper arm with a good aesthetic appearance in which the portion and the shaft support portion are not visible. Therefore, it is possible to provide a wiper arm that is formed of a smooth surface without using a rivet that pivotally supports the arm head and the retainer and that has no water droplet residue and has excellent corrosion resistance.

  In addition to the above-described invention, a cylindrical member provided on the outer periphery of the shaft support portion of the retainer and subjected to a friction reduction process is provided, and the cylindrical member is interposed between the shaft support portion of the retainer and the bearing portion. It is characterized by that.

  According to this configuration, the cylindrical member prevents direct interference between the bearing portion formed by the arm head and the arm head cover and the shaft support portion of the retainer. Therefore, by performing a friction reduction process on the cylindrical member, metal fatigue and deterioration of the bearing portion and the shaft support portion can be alleviated. Further, it is possible to prevent an abnormal noise caused by the bearing portion and the shaft support portion of the retainer interfering with each other and axially moving the retainer.

  Further, in addition to the above-described invention, the shaft support portion is formed by extruding a side wall of the retainer, and further includes a piece inserted into a recess formed by extruding the side wall portion of the retainer. The surface of the retainer is coated from above the piece.

  According to this configuration, when forming the shaft support portion of the retainer, the cylindrical push die is applied to the outer side wall to generate the cylindrical protrusion portion protruding on the inner side surface, and this can be used as the shaft support portion. it can. This molding method can reduce the molding cost as compared with a method in which a cylindrical projection is welded to the inner side surface and a method in which a retainer is molded by creating a cylindrical projection mold. Furthermore, a smooth surface without irregularities is formed on the outer surface of the retainer by burying a piece corresponding to the cylindrical concave shape formed on the outer surface side of the side wall of the retainer and coating the retainer with anticorrosion from above. can do. Therefore, it is possible to provide a wiper arm having a good aesthetic appearance and no corrosion residue and excellent corrosion resistance.

  According to the present invention, the shaft support provided on the inner side surface of the retainer is supported by the bearing portion formed by fitting and fixing the arm head cover to the arm head, thereby supporting the retainer and the arm head. Can be eliminated to provide a wiper arm with good aesthetics and excellent corrosion resistance.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, exemplary embodiments of the invention will be described with reference to the accompanying drawings. FIGS. 1 to 7 show a vehicle wiper arm as an embodiment of the present invention. FIGS. 1 to 3 show the first embodiment, FIGS. 4 and 5 show the second embodiment, and FIGS. FIG. 7 shows the third embodiment.

  FIG. 1 is an external view schematically showing a vehicle wiper arm according to a first embodiment of the present invention. As shown in FIG. 1, the wiper arm 1 includes an arm head 10 having an arm head base end 11 fixed to a slidable drive shaft (not shown) attached to a drive motor fixed to the vehicle body, and a distal end. And a retainer 30 having a blade attachment portion 31 for attaching a wiper blade (not shown) to the portion.

  The retainer 30 has a retainer base end portion 32 engaged with the arm head distal end portion 12 of the arm head 10, and can support the retainer 30 so that it can be tilted without using a rivet. This shaft-supporting portion is called a shaft support portion. The detailed configuration of the shaft support will be described with reference to FIG.

  The cross section of the retainer base end portion 32 of the retainer 30 in the shaft support portion is a U-shape, and the arm head distal end portion 12 of the arm head 10 enters the U-shape of the retainer 30. Since no rivet is used, no protrusion is formed on the retainer base end portion 32 of the retainer 30. Therefore, the wiper arm can be configured with only a smooth surface.

  FIG. 2 is an exploded perspective view showing a shaft support portion of the arm head and the retainer of the vehicle wiper arm according to the first embodiment of the present invention. As shown in FIG. 2, the arm head 10 is provided with an arm head sandwiching portion 13 and a semicircular cylindrical bearing portion 15 at the arm head distal end portion 12. Further, the arm head clamping portion 13 is provided with a positioning pin 16 projecting toward the front side and a mounting hole 14 at substantially the center. Moreover, the arm head 10 is shape | molded, for example with iron.

  The arm head cover 20 provided at the tip of the arm head 10 is disposed so as to face each other in the same semicircular cylindrical shape as the cover sandwiching portion 23 that is an attachment surface of the arm head 10 and the arm head bearing portion 15. Cover bearing portion 25 is provided. Further, the cover clamping portion 23 is provided with a positioning hole 26 that fits the positioning pin 16 of the arm head 10 and an attachment through hole 24 that has the same diameter and threading as the attachment hole 14 of the arm head 10. Yes. The arm head cover 20 is formed of the same material as the arm head 10.

  When the positioning pin 16 of the arm head 10 is inserted into the positioning hole 26 of the arm head cover 20 and the cover clamping portion 23 and the arm head clamping portion 13 are aligned, the arm head bearing portion 15 and the cover bearing portion 25 The bearing part which is an integral cylindrical groove is formed. Further, the mounting hole 14 of the arm head 10 and the mounting through hole 24 of the arm head cover 20 form an integral mounting hole.

  The retainer base end portion 32 of the retainer 30 has a U-shaped cross section, and a cylindrical shaft support portion 34 is provided on the retainer inner wall surface 33 of the retainer base end portion 32. The shaft support 34 is formed by applying a cylindrical pressing die to the outer side wall of the retainer 30 and providing a cylindrical cylindrical groove 35, and forming a cylindrical protrusion on the inner side surface. Can do. The cylindrical shaft support portion 34 has the same shape as the cylindrical groove formed by the arm head bearing portion 15 and the cover bearing portion 25. The retainer 30 is formed of, for example, aluminum.

  Further, a metal bushing 40 is sandwiched between the arm head bearing portion 15 and the cover bearing portion 25. The bushing 40 is a hollow cylinder, and a coating process 42 (see FIG. 3) for reducing the frictional resistance is applied to the inner surface 41 of the bushing. The shaft support portion 34 of the retainer 30 is inserted into the bushing inner side surface 41 of the bushing 40, and then the outer surface of the metal bushing 40 is sandwiched between the arm head bearing portion 15 and the cover bearing portion 25 in this state. To do. At that time, the positioning pin 16 of the arm head 10 is inserted into the positioning hole 26 of the arm head cover 20 so that the cover clamping portion 23 and the arm head clamping portion 13 are aligned with no gap.

  Next, the fixing screw 50 is passed through the mounting through hole 24 from the fixing groove 28 of the arm head cover 20 and fixed by the mounting hole 14 of the arm head 10. Thereby, the arm head cover 20 and the arm head 10 are fixed. The longitudinal direction and the lateral direction are regulated by the positioning pin 16 of the arm head 10 and the positioning hole 26 of the arm head cover 20. Finally, by embedding the cylindrical piece 60 in the cylindrical groove 35, the external surface of the retainer 30 becomes smooth, and the aesthetic appearance can be improved.

  FIG. 3 is a cross-sectional view schematically showing the shaft support portion of the wiper arm according to the first embodiment of the present invention. FIG. 3 is a cross-sectional view of the shaft support in a state where the components shown in FIG. 2 are combined. As shown in FIG. 3, the cross section of the proximal end side 32 of the retainer 30 has a U shape, and the arm head distal end portion 112 of the arm head 10 enters the U shape of the retainer 30. . Further, on both side surfaces of the base end side 32 of the retainer 30, shaft support portions 34 are formed by being pushed in from the outside. A bushing 40 in which a coating treatment 42 is applied to the inner surface 41 of the bushing is disposed so as to cover the shaft support portion 34. As a result, the frictional resistance applied to the shaft support portion 34 is reduced, and the retainer 30 can be smoothly rotated. Further, since the bushing 40 is sandwiched between the arm head bearing portion 15 and the cover bearing portion 25 of the arm head 10, the bushing 40 is held and fixed without rotating following the axial movement of the shaft support portion 34. can do.

  An attachment hole 14 is provided in the approximate center of the arm head 10, and a fixing screw 50 passes through the arm head cover 20 and is fixed by the attachment hole 14. The wiper arm is provided with a spring (not shown) that joins the arm head 10 and the retainer 30. The spring is provided on the inner side (vehicle inner side) of the arm head 10 and the retainer 30, and the spring groove portion 17 is provided on the inner side of the arm head 10 so that the spring does not interfere with the arm head 10. In addition, a piece 60 having the same shape as the cylindrical groove 35 formed on the outer side surface of the retainer 30 is pushed in from the outside of the retainer 30 to smooth the outer surface of the retainer 30. Further, since the outer surface of the retainer 30 is smooth, there is no water droplet residue and the corrosion resistance is improved.

  Therefore, according to the present embodiment, the shaft support portion 34 of the retainer 30 is supported by the bearing portions 15 and 25 formed by fitting and fixing the arm head cover 20 to the other end of the arm head 10, and the retainer 30 is started. It can be pivoted in a tiltable manner. Further, since the shaft support portion 34 of the retainer 30 is provided so as to protrude inside the retainer 30, the bearing portions 15 and 25 including the arm head 10 and the arm head cover 20 are covered with the retainer base end portion 32. It is possible to provide a wiper arm having a good appearance in which the bearing portions 15 and 25 and the shaft support portion 34 are not visible on the external appearance of the retainer 30 and the arm head 10. Therefore, it is possible to provide a wiper arm that is configured with a smooth surface without using a rivet that pivotally supports the arm head 10 and the retainer 30 and has no water droplet residue and excellent corrosion resistance.

  Further, according to the present embodiment, the bushing 40 prevents direct interference between the bearing portions 15 and 25 formed by the arm head 10 and the arm head cover 20 and the shaft support portion 34 of the retainer 30. Therefore, by performing a friction reduction process on the bushing 40, metal fatigue and deterioration of the bearing portions 15 and 25 and the shaft support portion 34 can be alleviated. Further, it is possible to prevent an abnormal noise that occurs when the bearing portions 15 and 25 and the shaft support portion of the retainer 30 interfere with each other to axially move the retainer 30.

  In addition, according to the present embodiment, when the shaft support portion 34 of the retainer 30 is formed, a cylindrical pressing die is applied to the outer side wall to generate a cylindrical protruding portion that protrudes to the inner side surface. The branch 34 can be used. This molding method can reduce the molding cost as compared with a method in which a cylindrical protrusion is welded to the inner side surface and a method in which a retainer 30 is formed by creating a cylindrical protrusion mold. Furthermore, by embedding a piece 60 corresponding to the shape of the cylindrical cylindrical groove 35 formed on the outer surface side of the side wall portion of the retainer 30, the retainer 30 is coated with an anticorrosive coating thereon, whereby the outer surface of the retainer 30 is uneven. It is possible to form a smooth surface free from any problem. Therefore, it is possible to provide a wiper arm having a good aesthetic appearance and no corrosion residue and excellent corrosion resistance.

  As described above, according to the first embodiment of the present invention, the retainer 30 and the arm head 10 are pivotally supported by sandwiching the pivot support provided on the inner side surface of the retainer 30 between the arm head 10 and the arm head cover 20. Therefore, the wiper arm 1 having good aesthetics and excellent corrosion resistance can be provided.

  Next, a second embodiment of the present invention will be described. In addition, description is abbreviate | omitted about the point which is the same structure as 1st Embodiment of this invention.

  FIG. 4 is an exploded perspective view showing a shaft support portion of an arm head and a retainer of a vehicle wiper arm according to a second embodiment of the present invention. FIG. 4 corresponds to FIG. 2 of the first embodiment of the present invention.

  In FIG. 4, the metal bushing 40 is not used between the arm head bearing portion 15 and the cover bearing portion 25, and the shaft support portion 34 of the retainer 30 is directly connected between the arm head bearing portion 15 and the cover bearing portion 25. Sandwich. However, a coating process 36 for reducing the frictional resistance is applied to the surface of the shaft support portion 34 of the retainer 30.

  As in the first embodiment of the present invention, the positioning pin 16 of the arm head 10 is inserted into the positioning hole 26 of the arm head cover 20, and the cover clamping portion 23 and the arm head clamping portion 13 are aligned with no gap therebetween. The shaft support portion 34 of the retainer 30 is sandwiched between the arm head bearing portion 15 and the cover bearing portion 25. Next, the fixing screw 50 is passed through the mounting through hole 24 from the fixing groove 28 of the arm head cover 20 and fixed by the mounting hole 14 of the arm head 10. Thereby, the arm head cover 20 and the arm head 10 are fixed. The longitudinal direction and the lateral direction are regulated by the positioning pin 16 of the arm head 10 and the positioning hole 26 of the arm head cover 20. Finally, by embedding the cylindrical piece 60 in the cylindrical groove 35, the external surface of the retainer 30 becomes smooth, and the aesthetic appearance can be improved.

  FIG. 5 is a cross-sectional view schematically showing a shaft support portion of a wiper arm according to the second embodiment of the present invention. FIG. 5 is a cross-sectional view of the shaft support in a state where the components shown in FIG. 4 are combined. FIG. 5 corresponds to FIG. 3 of the first embodiment of the present invention.

  As shown in FIG. 5, the cross section of the proximal end side 32 of the retainer 30 has a U shape, and the arm head distal end portion 112 of the arm head 10 enters the U shape of the retainer 30. . Further, on both side surfaces of the base end side 32 of the retainer 30, shaft support portions 34 are formed by being pushed in from the outside. A coating process 36 is applied so as to cover the surface of the shaft support 34. As a result, the frictional resistance applied to the shaft support portion 34 is reduced, and the retainer 30 can be smoothly rotated.

  An attachment hole 14 is provided in the approximate center of the arm head 10, and a fixing screw 50 passes through the arm head cover 20 and is fixed by the attachment hole 14. The wiper arm is provided with a spring (not shown) that joins the arm head 10 and the retainer 30. The spring is provided on the inner side (vehicle inner side) of the arm head 10 and the retainer 30, and the spring groove portion 17 is provided on the inner side of the arm head 10 so that the spring does not interfere with the arm head 10. In addition, a piece 60 having the same shape as the cylindrical groove 35 formed on the outer side surface of the retainer 30 is pushed in from the outside of the retainer 30 to smooth the outer surface of the retainer 30. Further, since the outer surface of the retainer 30 is smooth, there is no water droplet residue and the corrosion resistance is improved.

  Thus, in the wiper arm according to the second embodiment of the present invention, the retainer 30 is characterized in that a friction reduction process is performed on the outer periphery of the shaft support portion 34.

  According to this configuration, by performing the friction reduction process of the shaft support portion 34 of the retainer 30, metal fatigue and deterioration of the bearing portions 15 and 25 and the shaft support portion 34 can be reduced. Further, it is possible to prevent noise generated by the bearing portions 15 and 25 and the shaft support portion 34 of the retainer 30 interfering with each other and axially moving the retainer 30.

  Next, a third embodiment of the present invention will be described. In addition, description is abbreviate | omitted about the point which is the same structure as 1st Embodiment and 2nd Embodiment of this invention.

  FIG. 6 is an exploded perspective view showing a shaft support portion of an arm head and a retainer of a vehicle wiper arm according to a third embodiment of the present invention. FIG. 6 corresponds to FIG. 2 of the first embodiment of the present invention and FIG. 4 of the second embodiment of the present invention.

  In FIG. 6, similarly to the first embodiment of the present invention, a metal bushing 40 is sandwiched between the arm head bearing portion 15 and the cover bearing portion 25. The bushing 40 is a hollow cylinder, and a coating treatment 42 (see FIG. 7) is applied to the bushing inner surface 41 to reduce frictional resistance. The shaft support portion 34 of the retainer 30 is inserted into the bushing inner side surface 41 of the bushing 40, and then the outer surface of the metal bushing 40 is sandwiched between the arm head bearing portion 15 and the cover bearing portion 25 in this state. To do. At that time, the positioning pin 16 of the arm head 10 is inserted into the positioning hole 26 of the arm head cover 20 so that the cover clamping portion 23 and the arm head clamping portion 13 are aligned with no gap.

  Next, the fixing screw 50 is passed through the mounting through hole 24 from the fixing groove 28 of the arm head cover 20 and fixed by the mounting hole 14 of the arm head 10. Thereby, the arm head cover 20 and the arm head 10 are fixed. The longitudinal direction and the lateral direction are regulated by the positioning pin 16 of the arm head 10 and the positioning hole 26 of the arm head cover 20.

  When forming the shaft support portion 34 of the retainer 30, a cylindrical boss is welded to the inner side surface of the retainer 30. At this time, the external surface of the retainer 30 remains smooth, and the aesthetic appearance of the wiper arm can be improved. Moreover, the operation | work which pushes the piece 60 (refer FIG. 2) in 1st Embodiment of this invention into the circular groove | channel 35 (refer FIG. 2) can be abbreviate | omitted.

  FIG. 7 is a cross-sectional view schematically showing a shaft support portion of a wiper arm according to a third embodiment of the present invention. FIG. 7 is a cross-sectional view of the shaft support in a state where the components shown in FIG. 6 are combined. FIG. 5 corresponds to FIG. 3 of the first embodiment of the present invention and FIG. 5 of the second embodiment of the present invention.

  As shown in FIG. 7, the cross section of the proximal end side 32 of the retainer 30 has a U shape, and the arm head distal end portion 112 of the arm head 10 enters the U shape of the retainer 30. . Further, on both side surfaces of the base end side 32 of the retainer 30, shaft support portions 34 are formed by being pushed in from the outside. A bushing 40 in which a coating treatment 42 is applied to the inner surface 41 of the bushing is disposed so as to cover the shaft support portion 34. As a result, the frictional resistance applied to the shaft support portion 34 is reduced, and the retainer 30 can be smoothly rotated. A through hole 133 is provided. Further, since the bushing 40 is sandwiched between the arm head bearing portion 15 and the cover bearing portion 25 of the arm head 10, the bushing 40 is held and fixed without rotating following the axial movement of the shaft support portion 34. can do.

  An attachment hole 14 is provided in the approximate center of the arm head 10, and a fixing screw 50 passes through the arm head cover 20 and is fixed by the attachment hole 14. Further, the wiper arm 1 is provided with a spring (not shown) that joins the arm head 10 and the retainer 30. The spring is provided on the inner side (vehicle inner side) of the arm head 10 and the retainer 30, and the spring groove portion 17 is provided on the inner side of the arm head so that the spring does not interfere with the arm head 10. Moreover, since there is no circular groove 35 (refer FIG. 3) of the retainer 30 in 1st Embodiment of this invention, the external appearance surface of the retainer 30 is smooth and can improve the beauty | look of a wiper arm. Further, since the outer surface of the retainer 30 is smooth, there is no water droplet residue and the corrosion resistance is improved.

  Thus, according to the second embodiment and the third embodiment of the present invention, the same effect as that of the first embodiment of the present invention can be obtained, and the shaft support provided on the inner side surface of the retainer 30 is provided with the arm head. By sandwiching between the arm 10 and the arm head cover 20, the rivet for pivotally supporting the retainer 30 and the arm head 10 can be eliminated, and the wiper arm 1 having good aesthetics and excellent corrosion resistance can be provided.

  In this embodiment, the coating treatment is provided on the inner surface 41 of the bushing 40 and the surface of the shaft support 34 of the retainer 30, but is not particularly limited. For example, the arm head bearing 15 and the cover bearing 25 may be provided.

  Moreover, although this embodiment was demonstrated as an example applied to the wiper arm for vehicles, it does not specifically limit. For example, the present invention is applied to a windscreen wiper for wiping the surface of a front window glass, a rear window glass, a mirror or a lamp of an automobile, a ship, a train or the like.

  The preferred embodiments of the present invention have been described above. However, the present invention can be variously modified and changed without departing from the concept of the claims.

1 is an external view schematically showing a vehicle wiper arm according to a first embodiment of the present invention. It is the disassembled perspective view which showed the axial support part of the arm head and retainer of the wiper arm for vehicles which concerns on 1st Embodiment of this invention. It is sectional drawing which showed typically the axial support part of the wiper arm for vehicles which concerns on 1st Embodiment of this invention. It is the disassembled perspective view which showed the axial support part of the arm head and retainer of the wiper arm for vehicles which concerns on 2nd Embodiment of this invention. It is sectional drawing which showed typically the axial support part of the wiper arm for vehicles which concerns on 2nd Embodiment of this invention. It is the disassembled perspective view which showed the axial support part of the arm head and retainer of the wiper arm for vehicles which concerns on 3rd Embodiment of this invention. It is sectional drawing which showed typically the axial support part of the wiper arm for vehicles which concerns on 3rd Embodiment of this invention. It is the external view which showed typically the wiper arm for vehicles concerning the former. It is sectional drawing which showed typically the axial support part of the wiper arm for vehicles which concerns on the past.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wiper arm 10 Arm head 11 Arm head base end part 12 Arm head front-end | tip part 13 Arm head clamping part 14 Mounting hole 15 Bearing part 16 Positioning pin 17 Spring groove part 20 Arm head cover 23 Cover clamping part 24 Mounting through-hole 25 Bearing part 26 Positioning hole 28 Fixing groove 30 Retainer 31 Blade mounting portion 32 Retainer base end portion 33 Retainer inner wall surface 34 Shaft support portion 35 Cylindrical groove 36 Coding process 40 Bushing 41 Bushing inner surface
50 fixing screw 60 piece 100 wiper arm 110 arm head 111 arm head base end portion 112 arm head front end portion 113 through hole 117 spring groove portion 120 rivet 121 connecting shaft 130 retainer 131 blade mounting portion 132 retainer base end portion 133 through hole 140 dry lubrication film

Claims (3)

In a wiper arm comprising: an arm head whose base end is pivotally supported by a drive shaft; and a retainer to which a wiper blade is mounted on a distal end side , wherein the arm head and the retainer are rotatably connected .
By fitting and fixing the arm head cover to the end surface of the arm head on the retainer side, a groove formed on the end surface of the arm head and a surface of the arm head cover facing the end surface of the arm head are formed. The bearing part is formed by combining with the groove,
At the end of the retainer on the arm head cover side, a retainer inner wall surface extending so as to sandwich the arm head cover, and a shaft support portion protruding from the retainer inner wall surface and inserted into the bearing portion are formed. wiper arm, characterized in that there.   The cylindrical member provided on the outer periphery of the shaft support portion of the retainer and subjected to a friction reduction process, wherein the cylindrical member is interposed between the shaft support portion of the retainer and the bearing portion. The wiper arm according to 1. The shaft support is formed by extruding the side wall of the retainer,
A piece inserted into a recess formed by extruding the side wall of the retainer;
The wiper arm according to claim 1 or 2, wherein the surface of the retainer is coated from above the piece.

Images