JP2010274670A - Wiper device of vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wiper device capable of preventing damage of wiper blade by force generated in a width direction of the wiper blade and prying force generated around a shaft in the longitudinal direction, with a simple and compact structure. <P>SOLUTION: A connecting part of a wiper arm oscillating along a windshield surface of a vehicle and the wiper blade for wiping the windshield surface includes a pair of opposed support walls 25 formed with a prescribed space in the longitudinal direction of the wiper blade, and an engaging part rotatably journaled by a pin 30 mounted between the pair of support walls 25. Either one of the support wall 25 and the engaging part is provided in the wiper arm, while the other of the support wall 25 and the engaging part is provided in the wiper blade. The pin 30 is disposed via an elastic part 32 provided in at least one of the support wall 25 and the engaging part. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a wiper device for wiping a windshield surface of a vehicle.

  A wiper device for a vehicle wipes raindrops and the like on a windshield surface with a blade rubber provided on the wiper blade by swinging a wiper arm and a wiper blade attached to the wiper arm within a predetermined range of the windshield surface. (See Patent Document 1).

  When the wiper device wipes the windshield surface, the blade rubber is brought into contact with the windshield surface and is slid. The sliding of the blade rubber generates a force generated in the width direction of the wiper blade and a twisting force generated around the longitudinal axis. In order to prevent the wiper blade from being damaged by such a force, a technique is disclosed in which the wiper arm and the wiper blade are connected via an elastic rubber body to alleviate the force (see Patent Document 1).

Japanese Utility Model Publication No. 63-29635

  The technique disclosed in Patent Document 1 has a high spring constant for the force generated in the width direction of the wiper blade and a low spring constant for the twisting force generated around the longitudinal axis. The joint structure is made by vulcanizing and molding an elastic rubber body inside the heavy shell. Such a structure is complicated and it has been difficult to improve productivity. In addition, since the elastic rubber body is provided on the side of the primary lever that supports the wiper blade that is connected to the wiper arm, it is necessary to increase the height from the windshield surface, impairing the aerodynamic characteristics. There was a risk. Further, the angle for the wiper blade to follow the windshield surface (the angle formed by the straight line along the longitudinal direction of the wiper blade with the arm: the angle rotated about the axis C in FIG. 1 of Patent Document 1) is the wiper arm and primary lever Therefore, when the elastic rubber body deteriorates with age and hardens, the wiper blade may not follow the windshield surface and may cause a gap.

  The present invention has been made in view of the background described above, and has a simple and compact structure, and prevents the wiper blade from being damaged by the force generated in the width direction of the wiper blade and the twisting force generated around the longitudinal axis. An object of the present invention is to provide a wiper device that can be used.

  The present invention includes a wiper device that includes a wiper arm 10 that swings along a windshield surface 50 of a vehicle V, and a wiper blade 20 that is connected to the wiper arm 10 via a connecting portion and wipes the windshield surface 50. 1. The connecting portion of this device is rotated by a pair of opposing support walls 25 formed at a predetermined interval in the longitudinal direction of the wiper blade and a pin 30 installed between the pair of support walls. And an engaging portion 11 that is pivotally supported. One of the support wall 25 and the engagement portion 11 is provided on the wiper arm 10, and the other of the support wall 25 and the engagement portion 11 is provided on the wiper blade 20. The pin 30 is disposed via an elastic part 32 provided on at least one of the support wall 25 and the engaging part 11.

  According to this configuration, since the displacement of the engaging portion in the lateral direction (the wiper blade width direction) can be regulated by the support wall, the elastic portion is deformed by the lateral force caused by the friction between the blade rubber and the windshield surface. The wiper blade can be tilted. Further, a mechanism for absorbing the twisting force of the wiper blade can be provided without increasing the height of the wiper blade. Further, since the wiper blade and the wiper arm can be rotated via the pin, even if the elastic portion is hardened due to aging, the wiper blade is not hindered from following the windshield surface.

  The said structure WHEREIN: The said support wall and the said engaging part are provided with the opposing surface which mutually opposes, and it can also comprise so that the convex curved surface may be formed in at least one of the said opposing surface.

  According to this configuration, when a lateral force is applied to the blade rubber, the wiper blade can be tilted along the curved shape of the opposing surface. Even when the wiper blade is tilted, the contact area (friction resistance) between the curved opposing surface and the wiper blade or wiper arm can be prevented from increasing, so that the wiper blade can be swung (following the windshield surface). It can be done smoothly.

  The said structure WHEREIN: The said curved surface can also be comprised so that it may be formed of the said elastic part. According to such a configuration, since the curved surface is formed in the elastic portion, the clearance between the support wall and the engagement portion can be easily eliminated by pressing the elastic portion against either the support wall or the engagement portion. Thus, the lateral movement of the engaging portion can be more reliably suppressed.

  In the above-described configuration, opposing mounting holes are formed in the pair of support walls, the elastic part is fitted into the mounting hole, and opposing through-holes are formed in the inserted elastic part, and the pin Is inserted into the through-hole so as to bridge between the pair of opposing support walls, and at least one of the end portions of the pins is engaged with the outer surface of the support wall. You can also. With this configuration, the elastic portion can be pressed toward the engaging portion by locking the end portion of the pin toward the elastic portion with caulking or the like, so that the support wall and the engaging portion can be more reliably connected. The clearance between them can be reduced.

  According to the present invention, there is provided a wiper device that can prevent a wiper blade from being damaged by a force generated in the width direction of the wiper blade and a twisting force generated around a longitudinal axis with a simple and compact structure. Can do.

It is a schematic block diagram of the wiper apparatus concerning one Embodiment of this invention. It is an exploded perspective view of the wiper device concerning one embodiment of the present invention. It is a perspective view which shows the outline of the connection part concerning one Embodiment of this invention. It is XX sectional drawing of FIG. It is a disassembled perspective view of the connection part concerning one Embodiment of this invention.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a wiper device 1 of the present embodiment. The wiper device 1 for wiping raindrops and the like on the windshield surface 50 of the vehicle V includes a wiper arm 10 and a wiper blade 20 attached to the tip of the wiper arm 10. The wiper arm 10 and the wiper blade 20 swing a predetermined wiping range of the windshield surface 50, and the blade rubber 21 provided on the wiper blade 20 slides while contacting the windshield surface 50 to wipe away raindrops and the like. Do.

  Referring to FIG. 2, a clip 11 is provided at the tip of the wiper arm 10. Referring also to FIG. 5, the clip 11 serves as an engaging portion that connects the wiper arm 10 and the wiper blade 20. The clip 11 includes a pair of side plates 12 and 12 and an intermediate portion 13 that connects the side plates 12 and 12. A pin receiving hole 15 having an insertion portion 16 that is partly cut out in the lower part of the figure (on the side of the windshield surface 50) is formed at a position where the side plates 12 and 12 face each other. It is a U-shaped hook 14 surrounding 15. The intermediate portion 13 is in a state in which the pin receiving holes 15, 15 at the opposing positions are penetrated coaxially, covers the periphery so as to form a part of the hole having the same diameter as the receiving hole 15, and reinforces the side plate 12. is doing. The clip 11 may be formed integrally with the tip of the wiper arm 10 or may be configured as a separate attachment.

  Referring to FIG. 2, the wiper blade 20 includes a primary lever 22 and covers 23 and 23 that are rotatably connected to both ends of the primary lever 22. The primary lever 22 and the covers 23, 23 hold a blade rubber 21 that extends in the longitudinal direction of the wiper blade 20 (wiper device) via a leaf spring 24. The leaf spring 24 urges the blade rubber 21 toward the windshield surface 50 to cause the blade rubber 21 to follow the windshield surface 50 during wiping (see also FIG. 1).

  Referring also to FIG. 5, a pair of support walls 25, 25 that are opposed to each other at a predetermined interval in the longitudinal direction of the wiper blade 20 are formed in the approximate center of the primary lever 22. The support wall 25 constitutes a connecting portion between the wiper arm 10 and the wiper blade 20 together with the clip 11 (engagement portion), the pin 30 and the like. Further, referring also to FIG. 4, the support wall curved surface having a predetermined width in the longitudinal direction of the support wall 25 on the opposing surface of the support walls 25, and having a convex curve when viewed from the width direction. 26 and 26 are formed. Mounting holes 27 and 27 for inserting an elastic bush 32 serving as an elastic portion are formed at positions where the support wall curved surfaces 26 and 26 face each other. A plurality of ribs 28 are also formed adjacent to the support wall curved surface 26 to reinforce the support wall 25.

  4 and 5, the elastic bush 32 has a donut shape in which a through hole 34 is formed at the center. For example, a resilient rubber body can be applied as the material. Moreover, the elastic bush 32 is provided with the elastic curved surface 33 in which one side was curved. The elastic curved surface 33 forms a curved surface 35 together with the above-described support wall curved surface 26 when the elastic bush 32 is inserted into the mounting hole 27 drilled in the support wall 25. With this configuration, the elastic curved surface 33 occupies the tip portion of the curved surface 35.

  Next, the entire structure of the assembled connecting portion will be described with reference to FIGS. Referring to FIG. 4, the outer side surfaces of the both side walls 12, 12 of the clip 11 abut against the elastic curved surfaces 33, 33 of the curved surface 35, and the pin 30 is connected to the pin accommodating hole 15 via the elastic bushes 32, 32 facing each other. Is inserted. The pin 30 inserted through the through hole 34 is fitted with washers 31 from both ends so as to hold the elastic bush 32 in the opposite direction, and the end portion 36 of the pin 30 presses the elastic bush 32 toward the clip 11 side. It is locked by caulking or the like. Referring to FIGS. 3 and 5, the pin 30 is inserted into the clip 11 from the insertion portion 16 constituting the U-shaped hook 14, and the pin 30 is inserted into the pin accommodation hole 15. The clip 11 is pivotally supported by a pin 30 installed between the pair of support walls 25 and 25 so as to be rotatable.

  In this configuration, both ends of the pin 30 are locked, and both washers 31, 31 are pressed against the support walls 25, 25, so that the support wall 25 is locked by the pin 30 and the washers 31, 31. 25 are sandwiched, and the pin 30 can be prevented from moving in the left-right direction in FIG. Further, by configuring the elastic bush 32 so as to be wider than the width of the support wall curved surface 26, the elastic bush 32 is compressed and deformed when the pin 30 is locked, so that the elastic bush 32 is directed toward the clip 11. Can be pressed. In this embodiment, since the lateral displacement of the clip 11 serving as the engaging portion can be restricted by the support wall 25 in this manner, the elastic bushing 32 against the lateral force generated when the windshield surface 50 is wiped off. By deforming, the wiper blade 20 can be kept in a properly tilted state.

  In the present embodiment, by disposing the elastic bush 32, the height from the windshield surface of the wiper blade disclosed in Patent Document 1 is increased and the height is suppressed compared to a configuration that may be complicated, A mechanism that absorbs the twisting force generated around the axis of the wiper blade can be provided with a simple and compact structure. Further, since the present embodiment rotates via the pin 30, even if the elastic bush 32 is hardened due to aging, the clip 11 is prevented from being detached and the wiper blade 20 is made to follow the windshield surface 50. be able to.

  Further, the outer surfaces of the side walls 12 and 12 of the clip 11 are in contact with the elastic curved surfaces 33 and 33 of the curved surface 35, so that when the lateral force is applied to the blade rubber 21, the curved shape of the curved surface 35 is increased. Accordingly, the wiper blade 20 can be tilted. Furthermore, this configuration can suppress an increase in frictional resistance due to an increase in the contact area between the curved surface 35 and the wiper blade 20 even when the wiper blade 20 is tilted. be able to.

  The embodiment of the present invention has been described above, but the present invention is not limited to such an embodiment, and can be modified and used without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Wiper apparatus 10 Wiper arm 11 Clip (engagement part)
12 side plate 13 intermediate part 14 U-shaped hook 15 pin receiving hole 16 insertion part 20 wiper blade 21 blade rubber 22 primary lever 23 cover 24 leaf spring 25 support wall 26 support wall curved surface 27 mounting hole 28 rib 30 pin 31 washer 32 elastic bush (Elastic part)
33 Elastic curved surface 34 Through hole 35 Curved surface V Vehicle

Claims (4)

A wiper arm that swings along the windshield surface of the vehicle;
A wiper device comprising a wiper blade connected to the wiper arm via a connecting portion and wiping the windshield surface,
The connecting portion is pivotally supported by a pair of opposing support walls formed at a predetermined interval in the longitudinal direction of the wiper blade and a pin laid between the pair of support walls. An engaging portion,
One of the support wall and the engagement portion is provided on the wiper arm,
The other of the support wall and the engaging portion is provided on the wiper blade,
The wiper device according to claim 1, wherein the pin is disposed via an elastic part provided on at least one of the support wall and the engaging part. The support wall and the engagement portion include opposing surfaces that face each other,
The wiper device according to claim 1, wherein a convex curved surface is formed on at least one of the opposing surfaces.   The wiper device according to claim 2, wherein the curved surface is formed by the elastic portion. Opposing mounting holes are formed in the pair of support walls,
The elastic portion is fitted into the mounting hole, and the opposed elastic portion is formed with an opposing through hole,
The pin is inserted into the through hole so as to bridge between the pair of opposing support walls,
The wiper device according to claim 3, wherein at least one of the end portions of the pin is locked by an outer surface of the support wall.

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