JP4950910B2 - Vehicle wiper device - Google Patents

Description

  The present invention relates to a vehicle wiper device that is provided on a vehicle such as an automobile and wipes a window glass.

  A vehicle such as an automobile is provided with a wiper device in order to wipe off deposits such as rainwater adhering to the wind glass (wind shield glass). The wiper device includes a wiper arm that is fixed to a pivot shaft that is rotatably supported by a vehicle body at a base end portion, and a wiper blade that is attached to a distal end of the wiper arm, and the pivot shaft is disposed inside the vehicle body. When driven to swing by the wiper motor, the wiper blade swings on the wind glass and the glass surface is wiped off.

  As an attachment structure for attaching the wiper blade to the tip of the wiper arm, for example, as shown in Patent Document 1, a U hook type having high attachment rigidity is often used. In the U-hook type mounting structure, a hook portion that bends in a U shape is provided at the tip of an arm piece provided on the wiper arm, and a clip (connecting piece) is provided on the rubber holder that holds the blade rubber of the wiper blade. The clip is rotatably supported by the rubber holder by a support pin, and the wiper blade is rotatably attached to the tip of the wiper arm by inserting a hook portion outside the clip.

  In order to prevent the hook part from being detached, the clip is provided with a locking arm. A locking projection is provided in the middle part of the locking arm, and when the hook is inserted into the clip, the locking projection engages with a locking hole provided in the hook to prevent the clip from being detached from the hook. Is done.

On the other hand, in order to release the engagement of the locking projection with the locking hole, a block-shaped operation portion is provided at the tip of the locking arm. The operating portion is provided at the tip of the locking arm so as to protrude in the same direction as the locking projection, that is, on the extension line of the tip of the hook portion. By pushing this operating portion, the locking arm is removed from the hook portion. The locking projection can be removed from the locking hole by being elastically deformed in a direction away from the locking hole. Accordingly, the wiper blade can be detached from the wiper arm by pulling the clip while pressing the operation unit.
Japanese Patent Laid-Open No. 10-16722

  In such a wiper device, side walls are provided on both side portions of the clip, and both side portions of the hook portion connected to the clip are supported by these side walls to swing the wiper blade in the wiping direction around the clip. I try to prevent rattling.

  However, in the wiper device shown in Patent Document 1, the operation part for operating the locking arm is arranged with a large distance from the tip of the hook part, and each side wall extends to both sides of the operation part. In spite of extending, there is a space between the side walls between the tip of the hook portion and the operation portion. Therefore, when a large load is applied to the wiper blade, the support length by the side wall of the hook portion becomes insufficient, and swinging and rattling in the wiping direction around the clip of the wiper blade cannot be sufficiently suppressed. There was a problem.

  An object of the present invention is to improve the wiping property of a wiper device for a vehicle by reducing swinging or rattling in a wiping direction of a wiper blade centering on a connecting piece.

A vehicle wiper device according to the present invention is a vehicle wiper device having a wiper arm fixed to a pivot shaft on the vehicle body side and a wiper blade attached to the tip of the wiper arm, provided on the wiper blade, and supported by a support pin A connecting piece that is rotatably supported, a hook portion that is provided at the tip of the wiper arm, is formed in a U shape and engages the outside of the connecting piece, and is provided on both sides of the connecting piece, and the hook portion A pair of side walls abutting on both sides of the hook, and a locking projection provided on the connecting piece so as to extend toward the tip of the hook portion, and a locking projection for engaging with a locking hole of the hook portion is provided at an intermediate portion An arm, and an operating portion that is provided at a distal end of the locking arm and operates the locking arm in a direction to remove the locking projection from the locking hole, and the distal end of the hook portion is the operating portion. Parts extends up to the, said hook portion, wherein the large notch width than the operation portion is provided which extends longitudinally from the width direction intermediate portion of the tip.

  According to the present invention, since the tip of the hook portion of the wiper arm is extended to the operation portion, the portion supported by the side wall of the hook portion can be lengthened to increase the support rigidity of the hook portion by the connecting piece. . As a result, it is possible to reduce the swinging and rattling of the wiper blade around the connecting piece in the wiping direction, and to improve the wiping performance of the vehicle wiper device. Further, even if the connecting piece rotates largely around the support pin as an axis, it is possible to reliably suppress swinging or rattling of the wiper blade around the connecting piece in the wiping direction.

  According to the present invention, the hook portion is provided with a notch that extends in the longitudinal direction from the widthwise middle portion of the tip and is wider than the operation portion. In addition, the wiper arm can be applied to the wiper blade arranged closer to the connecting piece, and the versatility can be enhanced.

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

  FIG. 1 is a perspective view showing a vehicle wiper device according to an embodiment of the present invention. The vehicle wiper device 11 (hereinafter referred to as a wiper device 11) is provided in a vehicle (not shown) such as an automobile. It is for wiping the wind glass (wind shield glass) of the vehicle, and has a wiper arm 12 and a wiper blade 13.

  The wiper arm 12 has an arm head 14 made of aluminum die cast, and this arm head 14 is fixed to a pivot shaft 16 provided on the vehicle body side by a nut (not shown) in a mounting hole 15 provided at the base end thereof. It has become so. A retainer 17 formed in a U-shaped arm shape with a steel plate or the like is connected to the tip of the arm head 14 by a connecting shaft 18 so as to be rotatable in a direction approaching and separating from the window glass. An arm stay 19 formed of a plate-like bar is fixed by caulking. Although not shown, a spring is accommodated in the retainer 17, and the retainer 17 is biased in the direction toward the window glass with the connecting shaft 18 as an axis by the spring force of the spring.

  On the other hand, the wiper blade 13 has a blade rubber 21 formed in a long shape by a rubber material and a rubber holder 22 for holding the blade rubber 21 in a curved manner along the glass surface. It comes in contact with the glass. Further, a connecting portion 23 is provided at a substantially intermediate portion in the longitudinal direction of the rubber holder 22, and the wiper blade 13 is attached to the tip of the wiper arm 12 at the connecting portion 23.

  2 is a perspective view showing a state before the connecting portion and the wiper arm shown in FIG. 1 are connected, and FIG. 3 is a perspective view showing a state where the hook portion shown in FIG. 2 is attached to the clip. 4 is a cross-sectional view of FIG. 3, and FIG. 5 is a bottom view showing an arrow A in FIG.

  As shown in FIG. 2, a U-shaped hook portion 24 is integrally formed with the arm stay 19 by bending the tip of the arm stay 19 at the tip of the wiper arm 12. The hook portion 24 includes a curved portion 24a that is curved with respect to the stay main body 19a of the arm stay 19, and a flat plate-like extension portion 24b that extends in parallel with the stay main body 19a from the distal end of the curved portion 24a. A locking hole 25 penetrating the extension 24b in the thickness direction is provided at a substantially central portion of the extension 24b.

  On the other hand, the connecting portion 23 of the wiper blade 13 is provided with a clip 26 as a connecting piece. The clip 26 is made of resin, and as shown in FIG. 4, includes a substantially cylindrical clip body 28 having a support hole 27 at the shaft center. On the other hand, a support pin 31 is fixed to the connecting portion 23 of the rubber holder 22 so that the axial direction is directed to the wiping direction. When the support pin 31 is fitted into the support hole 27 from the assembly slit 32, the clip The main body 28 is rotatably supported by the rubber holder 22 by support pins 31. Then, as shown in FIG. 4, the hook portion 24 is fitted to the outside of the clip main body 28 so that the inner peripheral surface of the curved portion 24 a comes into contact with the arcuate outer peripheral surface of the clip main body 28. Is engaged with the clip 26, whereby the wiper blade 13 is attached to the tip of the wiper arm 12.

  As shown in FIG. 4, the clip main body 28 is integrally provided with a plate-like support wall 33 extending in the tangential direction, and the stay main body 19 a abuts the support wall 33, thereby supporting the arm stay 19. The rotation with respect to the clip main body 28 with the pin 31 as an axis is regulated.

  Further, in order to lock the clip 26 to the hook portion 24 of the wiper arm 12, a locking arm 34 is integrally provided on the clip body 28. As shown in FIG. 4, the locking arm 34 is formed in a bar shape extending in the tangential direction of the clip main body 28 in parallel with the support wall 33 from the side opposite to the support wall 33. 24 extends from the clip body 28 toward the tip of the hook portion 24, that is, the extension portion 24b, and comes into contact with the inner surface of the extension portion 24b on its outer side surface. The locking arm 34 is elastically deformable in a direction approaching / separating from the support wall 33 with a connecting portion with the clip body 28 as a fulcrum.

  As shown in FIGS. 4 and 5, a locking projection 35 that protrudes toward the outside is provided on the outer surface of the intermediate portion in the longitudinal direction of the locking arm 34. The locking projection 35 is adapted to engage with a locking hole 25 provided in the extension portion 24b when the clip body 28 is fitted in the hook portion 24. As a result, the clip body 28 is held inside the hook portion 24 to be prevented from being detached from the hook portion 24, and the wiper blade 13 is held at the tip of the wiper arm 12.

  On the other hand, an operation portion 36 is provided at the distal end of the locking arm 34 in order to release the engagement of the locking projection 35 with the locking hole 25 so that the wiper blade 13 can be detached from the wiper arm 12. The operation portion 36 is formed in a block shape, and protrudes in the same direction as the locking projection 35 from the tip of the locking arm 34 integrally with the locking arm 34. When the operating portion 36 is pushed toward the support wall 33 side, the locking arm 34 is elastically deformed in the direction away from the side of the support wall 33, that is, the extension portion 24 b, with the connecting portion with the clip body 28 as a fulcrum. 35 can be removed from the locking hole 25. That is, by pressing the operation portion 36, the locking arm 34 can be operated in a direction to remove the locking projection 35 from the locking hole 25. Therefore, the wiper blade 13 can be removed from the wiper arm 12 by pulling the clip 26 toward the opening side of the hook portion 24 while pushing the operation portion 36.

  Side walls 37 are provided on both sides of the clip 26 integrally with the clip body 28 and the support wall 33, respectively. These side walls 37 are formed so as to extend from the clip body 28 to positions adjacent to the distal end portion of the support wall 33, that is, the operation portion 36, respectively. The abutment portion 24b comes into contact with both side portions. As a result, the hook portion 24 is sandwiched between the side walls 37 to restrict the movement of the wiper blade 13 in the wiping direction with respect to the clip main body 28, and the swinging and rattling of the wiper blade 13 around the clip main body 28 is suppressed. Is done.

  In the wiper device 11, the hook portion 24, that is, the distal end of the extension portion 24 b is formed so as to extend to (in the vicinity of) the operation portion 36. The portion supported by 37 is lengthened so that the support rigidity of the hook portion 24 by the clip 26 is increased.

  FIG. 6 is an explanatory view showing a comparative example in which the tip of the hook part is provided away from the operation part in comparison with the present invention.

  In the comparative example shown in FIG. 6, the hook portion 24 provided at the tip of the wiper arm 12 has a length dimension L1 from the boundary with the curved portion 24a of the extension 24b to the tip defined by the Japanese Industrial Standard (JIS). It is formed to have a predetermined length. Therefore, in the comparative example, a large gap is opened between the distal end of the extension portion 24 b and the operation portion 36, and the extension portion 24 b is disposed between the side walls 37 between the distal end of the extension portion 24 b and the operation portion 36. It is not a space.

  On the other hand, in the wiper device 11 of the present invention, as shown by a two-dot chain line in FIG. 6 (as can also be seen from FIG. 5), the length dimension from the boundary between the extended portion 24b and the curved portion 24a to the tip. L2 is set longer than the length dimension L1 of the extension 24b of the comparative example, and the tip thereof reaches the operation part 36. Thereby, in the wiper device 11 of the present invention, the length of the contact portion of the extension portion 24b with both side walls 37 is longer than the comparative example in the portion supported by each side wall 37 of the extension portion 24b. On the other hand, the support rigidity of the hook part 24 by the clip 26 is improved.

  Thus, in this wiper device 11, since the tip of the extension 24b of the hook portion 24 is extended to the operation portion 36, the contact portions of the extension 24b with both side walls 37 are lengthened, and the clip 26 The supporting rigidity of the hook part 24 can be increased. As a result, the wiper blade 13 swinging in the wiping direction around the clip 26 and rattling can be reduced, and the wiping performance of the wiper device 11 can be enhanced. Further, even when the clip 26 rotates largely about the support pin 31 as an axis, the hook portion 24 is securely supported by the clip 26 and the wiper blade 13 around the clip 26 is swung in the wiping direction. Shaking can be reliably suppressed.

  7 is a cross-sectional view showing a modification of the hook portion shown in FIG. 4, and FIG. 8 is a bottom view showing an arrow A in FIG. In FIGS. 7 and 8, members corresponding to those described above are denoted by the same reference numerals.

  In the case shown in FIGS. 4 and 5, the extension 24 b of the hook 24 is formed in a substantially rectangular plate shape. On the other hand, in the modification shown in FIGS. 7 and 8, the extension 24b of the hook portion 24 is formed in the same length L2 as in the case shown in FIG. 4 in the length dimension from the boundary to the curved portion 24a. However, the extension 24b is provided with a notch 41 extending in the longitudinal direction from the intermediate portion in the width direction of the tip toward the curved portion 24a, whereby the tip of the extension 24b is formed in a fork shape. Has been. Further, the width of the notch 41 is set wider than the width of the operation portion 36, and the distance L3 from the axis of the support pin 31 of the bottom side 42 is an extension portion in the comparative example shown in FIG. It is formed to be the same as the length dimension L1 of 24b JIS standard.

  Thus, for example, as shown by a two-dot chain line in FIGS. 7 and 8, the wiper blade 13 in which the operation portion 36 is disposed closer to the clip body 28 than the tip of the extension portion 24 b is attached to the wiper arm 12 of the present invention. Even in this case, the operation part 36 is located inside the notch 41 and does not hit the extension part 24 b, and the wiper blade 13 can be attached to the wiper arm 12.

  As described above, in the wiper device 11, the extension portion 24b is provided with the notch 41 extending in the longitudinal direction from the intermediate portion in the width direction at the tip and wider than the operation portion 36. The wiper blade 13 disposed closer to the clip body 28 than the distal end of the extension 24b can be attached to the wiper arm 12 of the present invention, and its versatility can be enhanced.

  Even when the length L2 of the extension 24b is set to be longer than the length L1 of the JIS standard, by providing the notch 41 in the extension 24b, the operation unit is positioned at a position conforming to the JIS standard. Since the wiper blade 13 provided with 36 can be attached to the wiper arm 12 of the present invention, the wiper blade 13 is reliably prevented from swinging and rattling in the wiping direction, and the wiping performance of the wiper device 11 is improved. be able to.

  9 and 10 are diagrams showing another embodiment of the notch shown in FIG.

  The notch 41 provided in the extension 24b is not limited to the shape shown in FIG. 8, but a shape that linearly widens from the bottom 42 toward the tip as shown in FIG. 9, or as shown in FIG. Alternatively, the width may be a curved shape extending from the bottom 42 toward the tip.

  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 above embodiment, the wiper arm 12 includes the arm head 14, the retainer 17, and the arm stay 19, but is not limited thereto, and includes a U-shaped hook portion 24 at the tip. Any other configuration may be used.

It is a perspective view which shows the wiper apparatus for vehicles which is one embodiment of this invention. It is a perspective view which shows the state before the connection of the connection part shown in FIG. 1, and a wiper arm. It is a perspective view which shows the state with which the hook part shown in FIG. 2 was mounted | worn with the clip. It is a cross-sectional view of FIG. It is a bottom view which shows the arrow A in FIG. It is explanatory drawing which shows the comparative example in which the front-end | tip of the hook part was provided apart from the operation part compared with this invention. It is a cross-sectional view which shows the modification of the hook part shown in FIG. It is a bottom view which shows arrow A in FIG. It is a figure which shows another Example of the notch shown in FIG. It is a figure which shows another Example of the notch shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Vehicle wiper apparatus 12 Wiper arm 13 Wiper blade 14 Arm head 15 Mounting hole 16 Pivot shaft 17 Retainer 18 Connection shaft 19 Arm stay 19a Stay main body 21 Blade rubber 22 Rubber holder 23 Connection part 24 Hook part 24a Curved part 24b Extension part 25 Engagement Stop hole 26 clip (connection piece)
27 Support hole 28 Clip body 31 Support pin 32 Assembling slit 33 Support wall 34 Locking arm 35 Locking protrusion 36 Operation part 37 Side wall 41 Notch 42 Bottom

Claims (1)

A vehicle wiper device having a wiper arm fixed to a pivot shaft on a vehicle body side and a wiper blade attached to a tip of the wiper arm,
A connecting piece provided on the wiper blade and rotatably supported by a support pin;
A hook portion provided at the tip of the wiper arm, formed in a U-shape and engaged with the outside of the connecting piece;
A pair of side walls provided on both side portions of the connecting piece and in contact with both side portions of the hook portion;
A locking arm provided on the connecting piece so as to extend toward the tip of the hook portion, and provided with a locking projection for engaging with a locking hole of the hook portion at an intermediate portion;
An operating portion that is provided at a tip of the locking arm, and operates the locking arm in a direction to remove the locking projection from the locking hole;
The tip of the hook portion extends to the operation portion, and the hook portion is provided with a notch that extends in the longitudinal direction from the intermediate portion in the width direction of the tip and is wider than the operation portion. A vehicle wiper device.

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