JP4299198B2 - Wiper blade and wiper device - Google Patents

Description

  The present invention relates to a wiper blade and a wiper device, and more particularly, to a wiper blade having a structure that follows a wiping surface even when the curvature of the wiping surface varies depending on the wiping position, and a wiper device including the wiper blade.

  2. Description of the Related Art Conventionally, vehicles such as passenger cars have been provided with a wiper device for wiping window glass and the like. The wiper device is provided with a wiper blade having a blade rubber. In the wiper blade, the blade rubber is held by a lever assembly formed by connecting a plurality of levers in a tournament shape. In the wiper blade lever assembly, the lower lever is rotatably connected to the upper lever.

  According to the structure of this lever assembly, even when the curvature differs depending on the wiping position of the wiping surface such as the window glass, the lower lever can rotate in accordance with the curvature of the wiping surface with respect to the upper lever. . Therefore, the wiper blade can follow the wiping surface by rotating the lower lever with respect to the upper lever in accordance with the curvature of the wiping surface.

  However, in recent years, with the improvement of vehicle design, the curvature of the wiping surface such as window glass has become larger. Therefore, in the configuration in which the blade rubber is simply held by a lever assembly in which a plurality of levers are connected in a tournament shape, when the wiper arm is swung, the tip of the wiper blade cannot follow the wiping surface, and wiping is performed. There was a case where an unwiped portion was generated on the surface.

  Therefore, in order to prevent an unwiped portion from being generated on the wiping surface, a torsion spring is interposed between the primary lever and the secondary lever, or between the secondary lever and the yoke lever, and the tip of the wiper blade is moved. A wiper blade that urges the wiping surface to rotate is proposed (see, for example, Patent Document 1).

According to the wiper blade described in Patent Document 1, the tip of the wiper blade can be biased by the torsion spring so as to rotate toward the wiping surface. Therefore, even when the tip of the wiper blade is positioned at a portion with a large curvature (a portion with a small radius of curvature) on the wiping surface as the wiper arm swings, the tip of the wiper blade can follow the wiping surface. is there. Thereby, it is possible to prevent an unwiped portion from occurring on the wiping surface.
Reality 1-18447 (Page 1-3, Figure 1-3)

  However, in the example described in Patent Document 1, when the tip of the wiper blade is located at a portion with a large curvature on the wiping surface, the wiping surface can be wiped cleanly. When the tip of the blade is located at a portion with a small curvature (a portion with a large curvature radius) on the wiping surface, the tip of the blade rubber is strongly pressed against the wiping surface.

  Therefore, when the tip of the wiper blade is located at a portion with a small curvature on the wiping surface, conversely, the contact pressure between the tip of the blade rubber and the wiping surface becomes too large, and wiping unevenness may occur on the wiping surface. There has been a problem that troubles such as abnormal noise occur.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a wiper blade and a wiper device capable of preventing the unwiped portion from being generated on the wiping surface.

  Another object of the present invention is to provide a wiper blade and a wiper device capable of preventing the occurrence of problems such as uneven wiping on the wiping surface and abnormal noise.

  According to the wiper pivot of the present invention, there is provided a wiper blade having a blade rubber for wiping the wiping surface and a lever assembly that is connected to an arm member and holds the blade rubber. The assembly includes a base lever rotatably connected to the arm member via a connecting shaft member, and a first rotating shaft member closer to the distal end side of the wiper device than the connecting shaft member of the base lever. A distal end movable lever coupled to be rotatable in a direction contacting and separating from the wiping surface, and a second pivot shaft member pivotably coupling the arm member to an arm head; and the coupling shaft member; Based on an angle formed by a first straight line connecting the connecting shaft member and a third rotating shaft member that rotatably connects a lower lever to the base lever and the second straight line connecting the connecting shaft member. By comprising a moving lever is rotated toward or away from said wiping surface is solved by.

  As described above, in the present invention, the lever assembly is rotatably connected to the arm member via the connecting shaft member, and the tip connected to the tip side of the wiper device with respect to the connecting shaft member of the base lever. A movable lever, and a first straight line connecting the second pivot shaft member and the coupling shaft member for pivotally coupling the arm member to the arm head, and a lower lever pivotally coupled to the base lever. Based on the angle formed by the second straight line connecting the third rotating shaft member and the connecting shaft member (the angle change around the connecting shaft member between the arm member and the base lever), the tip movable lever moves relative to the base lever. The first rotating shaft member can be rotated around the wiping surface in the direction of contact with and away from the wiping surface. Therefore, even when the curvature of the wiping surface changes greatly with the swing position of the wiper arm, the tip movable lever can be rotated with respect to the base lever in accordance with the curvature of the wiping surface.

  Further, in the present invention, the first straight line connecting the second rotation shaft member and the connection shaft member for rotatably connecting the arm member to the arm head, and the third line for rotatably connecting the lower lever to the base lever. Based on the angle formed by the second straight line connecting the pivot shaft member and the connecting shaft member, the tip movable lever can be pivoted in a direction contacting and separating from the wiping surface. Therefore, for example, when the tip of the wiper blade is located at a portion having a small curvature on the wiping surface, the tip movable lever and the base lever can be substantially linear along the wiping surface.

  Therefore, even if the curvature of the wiping surface decreases as the tip of the wiper blade moves from a portion with a large curvature on the wiping surface to a portion with a small curvature, the tip movable lever and the base lever almost move along the wiping surface. It is possible to rotate the tip movable lever according to the curvature of the wiping surface so as to be linear. As a result, the contact pressure to the wiping surface in the entire longitudinal direction of the blade rubber can be maintained uniformly, so that the tip portion of the blade rubber is always prevented from being locally pressed against the wiping surface as in the past. It becomes possible.

  Moreover, even if the curvature of the wiping surface increases as the tip of the wiper blade moves from a portion with a small curvature on the wiping surface to a portion with a large curvature, the wiping surface of the movable lever is adjusted to match the curvature of the wiping surface. It can be rotated to bend to the side. Thereby, even if the curvature of the wiping surface increases with the wiping operation of the wiper device, the blade rubber can follow the change of the wiping surface.

  More specifically, according to the present invention, more specifically, the present invention includes a connecting member that is connected to the arm member and rotatably supported by the connecting shaft member, and the tip end is movable. A rear end abutting portion that extends toward the connecting member from the first rotating shaft member is formed on the lever, and a wiping surface of the rear end abutting portion that extends toward the distal end movable lever from the connecting shaft member on the connecting member. It is the structure by which the front-end | tip contact part which contact | abuts the side is formed.

  According to such a configuration, for example, as the tip of the wiper blade moves from a portion with a large curvature on the wiping surface to a portion with a small curvature, the angle formed by the first straight line and the second straight line gradually increases. When it becomes large, the tip contact portion of the connecting member connected to the arm member can be moved in a direction approaching the wiping surface by the action of the scissors using the connecting shaft member of the arm member as a fulcrum.

  Therefore, the tip movable lever rotates to the side opposite to the wiping surface with the rotation shaft member as the rotation center within a range in which the rotation is restricted by the rear end contact portion coming into contact with the tip contact portion. It is acceptable. As a result, as the curvature of the wiping surface decreases, the tip movable lever and the base lever can be made substantially linear along the wiping surface.

  In addition, according to the above configuration, the angle between the first straight line and the second straight line gradually decreases as the tip of the wiper blade moves from the portion with a small curvature on the wiping surface to the portion with a large curvature. In this case, the tip contact portion of the connecting member connected to the arm member can be moved away from the wiping surface by the action of the scissors using the connecting shaft member of the arm member as a fulcrum.

  As a result, the lower end of the rear end abutting portion is pushed up by the front end abutting portion, so that the tip movable lever can be rotated to the wiping surface side in accordance with the curvature of the wiping surface, so the curvature of the wiping surface increases. Even so, the blade rubber can be made to follow the change in the wiping surface.

  According to a third aspect of the present invention, when the rotating shaft member is provided on the distal end side of the wiper device with respect to the top of the wiping surface, the base lever and the distal end movable lever are separated from the top of the wiping surface. Therefore, it is preferable that the tip of the wiper blade can be surely followed by a wiping surface having a large curvature.

  Further, as described in claim 4, when the lower lever holding the blade rubber in the lever assembly is rotatably connected to the tip movable lever and the base lever, the curvature of the wiping surface differs depending on the wiping position. Even in this case, the plurality of lower levers holding the blade rubber can be rotated at appropriate angles with respect to the tip movable lever and the base lever, respectively. is there.

  According to a fifth aspect of the present invention, an arm head fixed to the pivot shaft, an arm member connected to the arm head so as to be rotatable toward and away from the wiping surface, and a tip of the arm member In the wiper device configured to include the wiper blades connected to each other, it is preferable that the wiper blade according to any one of claims 1 to 4 is used as the wiper blade.

  As described above, according to the present invention, since the tip portion of the blade rubber can be prevented from being locally pressed against the wiping surface, the wiping surface has a problem such as uneven wiping or abnormal noise. Can be prevented. Moreover, even if the curvature of the wiping surface increases, the blade rubber can follow the change of the wiping surface, so the wiping surface can be wiped cleanly, and the wiping surface can be prevented from being left uncleaned. Is possible.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. It should be noted that members, arrangements, and the like described below do not limit the present invention, and it goes without saying that various modifications can be made in accordance with the spirit of the present invention.

  First, a configuration of a wiper device according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5. 1 to 5 are views showing an embodiment of the present invention. FIG. 1 is a top view showing the overall configuration of the wiper device. FIG. 2 is a side view of the wiper device as viewed from the direction AA in FIG. 3 is an enlarged top view of the main part showing the configuration of the central part in the longitudinal direction of the wiper blade, FIG. 4 is an enlarged side view of the main part showing the structure of the central part in the longitudinal direction of the wiper blade, and FIG. 5 is an operation of the wiper blade shown in FIG. It is explanatory drawing explaining these. 4 and 5, a part of the member is notched and shown in cross section for easy understanding of the internal configuration of the wiper blade.

  A wiper device 1 according to an embodiment of the present invention is for wiping a wiping surface 100 such as a window glass provided in a vehicle such as a passenger car, and includes a wiper arm 2 and a wiper blade 3. It is configured. The wiper arm 2 includes an arm head 21 that is fixed to a pivot shaft 44a (see FIG. 6) described later. An arm member 23 is connected to the tip of the arm head 21 via a rotating shaft member 22 made of rivets or the like. The arm member 23 includes a retainer 24 and an arm piece 25, and is rotatable in a direction in which the rotation shaft member 22 is brought into contact with and away from the wiping surface 100 with the rotation shaft member 22 as a rotation center.

  As shown in FIG. 2, one end of a spring 26 is locked to the retainer 24, and the other end of the spring 26 is locked to the arm head 21. With this configuration, the arm member 23 is urged so as to rotate toward the wiping surface 100 by a pulling force by the spring 26.

  In this example, the wiper blade 3 connected to the tip of the arm member 23 is pressed against the wiping surface 100 by urging the arm member 23 to rotate toward the wiping surface 100. ing. A hook portion 25a bent in a substantially U shape is formed at the distal end portion of the arm piece 25, and an engagement hole 25b penetrating in the thickness direction is formed at the folded distal end portion of the hook portion 25a. (See FIG. 4).

  The wiper blade 3 includes a lever assembly La and a blade rubber 35. The lever assembly La includes a primary lever 31, a secondary lever 32, a yoke lever 33, and a connecting member 34. The primary lever 31 of this example is divided into a base lever 36 and a tip movable lever 37. A secondary lever 32 is rotatably connected to one end of the base lever 36, and a yoke lever 33 is rotatably connected to both ends of the secondary lever 32.

  As shown in FIG. 3, a substantially U-shaped housing portion 36d formed by side surfaces 36a, 36b, and 36c is provided at a portion closer to the distal end movable lever 37 than the longitudinal center portion of the base lever 36. ing. A connecting shaft member 38 made of rivets or the like is fixed to the accommodating portion 36d of this example. The connecting shaft member 38 is stretched over the side surface 36a and the side surface 36b of the accommodating portion 36d.

  As shown in FIGS. 3 and 4, side extension portions 36e and 36f extending toward the distal end movable lever 37 are integrated with the accommodating portion 36d on the distal end movable lever 37 side of the base lever 36 from the connecting shaft member 38. The side surface extending portions 36e and 36f are provided with a rotating shaft member 39 made of rivets or the like. In this example, the rotation shaft member 39 is disposed on the distal end side (the side indicated by the arrow X in FIGS. 2 and 4) of the wiper device 1 with respect to the top portion 101 of the wiping surface 100.

  The distal end movable lever 37 is disposed on the distal end side of the wiper blade 3 and can be rotated by a rotation shaft member 39 provided on the base lever 36. And in this example, as mentioned above, the rotating shaft member 39 is arrange | positioned rather than the top part 101 of the wiping surface 100 at the front end side (side shown by arrow X in FIG. 2, FIG. 4). Therefore, the base lever 36 and the tip movable lever 37 can be bent with the top 101 of the wiping surface 100 as a boundary.

A rear end abutting portion 37 a that protrudes toward the connecting member 34 is formed on the connecting member 34 side of the distal end movable lever 37 from the rotating shaft member 39. As will be described later, the rear end contact portion 37a comes into contact with a front end contact portion 34i formed on the connecting member 34. The rear end contact portion 37 a in this example is formed by folding a tongue-like body extending toward the connecting member 34 toward the front end side of the wiper blade 3.

  As shown in FIG. 2, a secondary lever 32 is rotatably connected to the tip of the tip movable lever 37, and yoke levers 33 are rotatably connected to both ends of the secondary lever 32. Yes. In the wiper blade 3 of this example, the blade rubber 35 is supported by the yoke levers 33 respectively connected to the secondary lever 32. In other words, in this example, the blade rubber 35 is supported at eight locations by the holding pieces 33 a formed on each of the yoke levers 33.

  As shown in FIG. 4, the connecting member 34 is a member for connecting the arm piece 25 and the wiper blade 3, and is accommodated in an accommodating portion 36 d formed in the base lever 36. As will be described later, the connecting member 34 of the present example has a function of rotating the tip movable lever 37 toward the wiping surface 100 according to the angle formed by the first straight line S1 and the second straight line S2. The connecting member 34 is made of a resin material and includes a connecting portion 34c between the side surface portion 34a and the side surface portion 34b.

  The connecting portion 34c is formed in a substantially U shape whose outer shape corresponds to the hook portion 25a. A shaft insertion hole 34d is formed in a bent portion of the connection portion 34c, and a connection shaft member 38 fixed to the base lever 36 is inserted into the shaft insertion hole 34d. In addition, an elastically deformable elastic piece 34e is formed at the lower portion of the connecting portion 34c, and an engaging protrusion 34f is formed at the approximate center of the elastic piece 34e.

  And the hook part 25a is latched by the connection part 34c in the state which the engagement protrusion 34f engaged with the engagement hole 25b of the hook part 25a. As a result, the connecting member 34 can rotate around the connecting shaft member 38 together with the arm piece 25.

  The connecting member 34 is formed with extending portions 34g and 34h extending from the position where the connecting shaft member 38 is provided to the distal end side of the wiper device 1, and the distal ends of the extending portions 34g and 34h. A tip abutting portion 34 i is formed to protrude toward the tip movable lever 37 side. The tip contact portion 34i of this example is configured to connect the side surface portion 34a and the side surface portion 34b. In addition, the tip contact portion 34 i of this example can be in contact with the lower surface 37 b of the rear end contact portion 37 a formed on the tip movable lever 37.

  In this example, as will be described later, the leading end abutting portion 34i pushes up the lower surface 37b of the trailing end abutting portion 37a, whereby the leading end movable lever 37 is rotated to the wiping surface 100 side. Although not particularly illustrated, the connection member 34 and the base lever 36 of the present example have a state where the wiper blade 3 is separated from the wiping surface 100 with the wiper arm 2 in a standing posture, that is, in a lockback state. A mechanism for restricting excessive rotation of the wiper blade 3 with respect to the wiper arm 2 is provided.

  Next, a vehicle wiper device to which the wiper device according to this embodiment is applied will be described with reference to FIG. FIG. 6 is a diagram showing a configuration of a vehicle wiper device according to an embodiment of the present invention. As shown in FIG. 6, the vehicle wiper device 40 according to the present embodiment includes the wiper device 1, a pipe frame 41, a wiper motor 42, a link mechanism 43, and a wiper pivot 44. The wiper motor 42 is a drive source of the vehicle wiper device 40, and is fixed to the central portion in the longitudinal direction of the pipe frame 41 via an attachment portion 41a.

  The link mechanism 43 transmits the output of the wiper motor 42 and includes a crank arm 43a and a link rod 43b. One end of a crank arm 43a is fixed to the output shaft 42a of the wiper motor 42, and one end of a link rod 43b is rotatably connected to the other end of the crank arm 43a through, for example, a ball joint. ing. The other end of the link rod 43b is movably connected to a swinging end of a pivot lever 44b provided on the wiper pivot 44.

  The wiper pivot 44 is fixed to the end of the pipe frame 41 and has a pivot shaft 44a. The arm head 21 of the wiper device 1 is fixed to the distal end portion of the pivot shaft 44a. A pivot lever 44b is fixed to the rear end portion of the pivot shaft 44a, and the swing end of the pivot lever 44b is rotatably connected to the link rod 43b.

  In the vehicle wiper device 40 of this example, when the output shaft 42a of the wiper motor 42 reciprocates, the pivot lever 44b reciprocally swings via the crank arm 43a and the link rod 43b due to the reciprocating rotation. 44a rotates within a predetermined rotation range. When the pivot shaft 44a rotates, the wiper arm 2 swings with the rotation of the pivot shaft 44a, and a predetermined range of the wiping surface 100 is wiped by the wiper blade 3.

  Next, the detailed operation of the wiper device according to the present embodiment will be described with reference to FIGS. 7 and 8 are explanatory views showing a state in which the wiper device according to the embodiment of the present invention operates. FIG. 7 shows a state in which the wiper blade 3 wipes a portion of the wiping surface 100 having a small curvature. FIG. 8 is a diagram illustrating a state in which the wiper blade 3 is wiping a portion having a large curvature on the wiping surface 100.

  In the following description, a straight line connecting the rotation shaft member 22 that rotatably supports the wiper arm 2 and the connection shaft member 38 is S1, and is connected to the rotation shaft member 36g provided at one end of the base lever 36. A straight line connecting the shaft member 38 is defined as S2. Further, regarding the angle formed by the first straight line S1 and the second straight line S2, when the second straight line S2 is closer to the wiping surface 100 than the first straight line S1, the plus (+) direction is set, and the second straight line S2 is the first straight line S1. The direction opposite to the wiping surface 100 is the minus (−) direction.

As shown in FIG. 7, in this example, the tip of the wiper blade 3 has a portion with a small curvature on the wiping surface 100 (a portion indicated by a curve L1;
When the position is in the position, the angle formed by the first straight line S1 and the second straight line S2 increases in the positive direction. Specifically, the angle formed by the first straight line S1 and the second straight line S2 is + β .

  In this example, as described above, the arm piece 25 rotates with the connecting shaft member 38 as a rotation shaft. Therefore, in a state where the angle formed by the first straight line S1 and the second straight line S2 is large in the plus direction, the connection member 34 connected to the arm piece 25 is caused by the action of the scissors having the connection shaft member 38 of the arm piece 25 as a fulcrum. The tip contact portion 34i moves to the wiping surface 100 side (see FIG. 4 for details).

  As a result, the distal end movable lever 37 rotates in the R1 direction with the pivot shaft member 39 as the pivot center within the range in which the rear end abutment portion 37a abuts on the distal end abutment portion 34i. It is allowed to move. Therefore, when the tip of the wiper blade 3 is located at a portion of the wiping surface 100 where the curvature is small (the portion indicated by the curve L1), the tip movable lever 37 and the base lever 36 are substantially linear along the wiping surface 100. It can be.

  And in this example, when the front-end | tip part of the wiper blade 3 moves from a small curvature part in the wiping surface 100 to a large curvature part by the wiping operation | movement of the wiper apparatus 1, in connection with this, 1st straight line S1 and 2nd straight line S2 The angle between and gradually decreases. Finally, as shown in FIG. 8, the tip of the wiper blade 3 is located in a portion with a large curvature on the wiping surface 100 (a portion indicated by a curve L2; for example, corresponding to a lower inversion position on the wiping surface 100). The angle formed by the first straight line S1 and the second straight line S2 is -α.

  If the angle between the first straight line S1 and the second straight line S2 gradually decreases as the tip of the wiper blade 3 moves from the small curvature portion to the large curvature portion of the wiping surface 100, the arm piece 25 The tip contact portion 34i of the connecting member 34 connected to the arm piece 25 moves in a direction away from the wiping surface 100 by the action of the scissors having the connecting shaft member 38 as a fulcrum (refer to FIG. 5 for details). Therefore, the front end movable lever 37 is forcibly rotated in the R2 direction with the rotation shaft member 39 as the center of rotation when the lower surface 37b of the rear end contact portion 37a is pushed up by the front end contact portion 34i. .

  Thus, in this example, even if the curvature of the wiping surface 100 increases as the distal end portion of the wiper blade 3 moves from a portion with a small curvature on the wiping surface 100 to a portion with a large curvature, the distal end movable lever 37 Can be rotated toward the wiping surface 100 in accordance with the curvature of the wiping surface 100. Therefore, even if the curvature of the wiping surface 100 increases, the blade rubber 35 can follow the change of the wiping surface 100. Thereby, the wiping surface 100 can be wiped cleanly and it can prevent that the wiping remaining part arises in the wiping surface 100. FIG.

  Then, when the tip of the wiper blade 3 is moved again from the portion with a large curvature on the wiping surface 100 to the portion with a small curvature by the wiping operation of the wiper device 1, the first straight line S1 and the second straight line S2 are formed accordingly. The angle gradually increases. Finally, as described above, when the tip of the wiper blade 3 is located in a portion having a small curvature on the wiping surface 100 (a portion indicated by a curve L1; for example, corresponding to the upper inversion position on the wiping surface 100). In addition, the angle formed by the first straight line S1 and the second straight line S2 is + Β.

  Thus, as the tip of the wiper blade 3 moves from the portion with a large curvature on the wiping surface 100 to the portion with a small curvature, the angle formed between the first straight line S1 and the second straight line S2 gradually increases in the positive direction. When it becomes larger, the tip abutting portion 34i of the connecting member 34 connected to the arm piece 25 moves in the direction approaching the wiping surface 100 by the action of the scissors using the connecting shaft member 38 of the arm piece 25 as a fulcrum (details are shown in the figure). 4).

  Therefore, the distal end movable lever 37 rotates in the R1 direction with the rotation shaft member 39 as the rotation center within a range in which the rotation is restricted by the rear end contact portion 37a contacting the front end contact portion 34i. Is allowed to do. When the tip of the wiper blade 3 reaches a portion of the wiping surface 100 having a small curvature (the portion indicated by the curve L1), the tip movable lever 37 and the base lever 36 are substantially linear along the wiping surface 100. .

  Thus, in this example, even if the curvature of the wiping surface 100 decreases as the distal end portion of the wiper blade 3 moves from a portion with a large curvature on the wiping surface 100 to a portion with a small curvature, the tip movable lever 37 The tip movable lever 37 can be rotated in accordance with the curvature of the wiping surface 100 so that the base lever 36 is substantially linear.

  Therefore, even when the tip of the wiper blade 3 moves from a portion with a large curvature on the wiping surface 100 to a portion with a small curvature as the wiper arm 2 swings, the blade rubber 35 can follow the change of the wiping surface 100. This is possible, whereby the wiping surface 100 can be wiped cleanly, and it is possible to prevent the wiping surface 100 from being left unwiped.

  In this example, even if the tip of the wiper blade 3 moves from a portion with a large curvature on the wiping surface 100 to a portion with a small curvature, the tip movable lever 37 and the base lever 36 are substantially straight. By rotating the movable lever 37 in accordance with the curvature of the wiping surface 100, the contact pressure on the wiping surface 100 in the entire longitudinal direction of the blade rubber 35 can be maintained uniformly.

  As a result, it is possible to prevent the tip portion of the blade rubber 35 from being locally pressed against the wiping surface 100 as in the prior art, so that wiping unevenness or abnormal noise occurs on the wiping surface 100. Can be prevented from occurring.

As described above, according to the present embodiment, the following effects are obtained.
(A) According to this embodiment, even if the curvature of the wiping surface 100 increases as the distal end of the wiper blade 3 moves from a portion with a small curvature on the wiping surface 100 to a portion with a large curvature, the tip is movable. The lever 37 can be rotated so as to bend toward the wiping surface 100 in accordance with the curvature of the wiping surface 100. Therefore, even if the curvature of the wiping surface 100 increases, the blade rubber 35 can follow the change of the wiping surface 100. Thereby, the wiping surface 100 can be wiped cleanly and it can prevent that the wiping remaining part arises in the wiping surface 100. FIG.

  (B) According to this embodiment, even if the curvature of the wiping surface 100 decreases as the distal end of the wiper blade 3 moves from a portion with a large curvature on the wiping surface 100 to a portion with a small curvature, the tip is movable. The tip movable lever 37 can be rotated in accordance with the curvature of the wiping surface 100 so that the lever 37 and the base lever 36 are substantially linear. Therefore, even when the tip of the wiper blade 3 moves from a portion with a large curvature on the wiping surface 100 to a portion with a small curvature as the wiper arm 2 swings, the blade rubber 35 can follow the change of the wiping surface 100. This is possible, whereby the wiping surface 100 can be wiped cleanly, and it is possible to prevent the wiping surface 100 from being left unwiped.

  (C) According to the present embodiment, even when the tip of the wiper blade 3 moves from a portion with a large curvature on the wiping surface 100 to a portion with a small curvature, the tip movable lever 37 and the base lever 36 are substantially linear. Thus, by rotating the tip movable lever 37 in accordance with the curvature of the wiping surface 100, the contact pressure to the wiping surface 100 in the entire longitudinal direction of the blade rubber 35 can be maintained uniformly. As a result, it is possible to prevent the tip portion of the blade rubber 35 from being locally pressed against the wiping surface 100 as in the prior art, so that wiping unevenness or abnormal noise occurs on the wiping surface 100. Can be prevented from occurring.

  (D) According to this embodiment, since the base lever 36 and the tip movable lever 37 can be bent with the top 101 of the wiping surface 100 as a boundary, the tip of the wiper blade 3 has the wiping surface 100 having a large curvature. Therefore, it is possible to make it follow reliably. Therefore, it is possible to reliably prevent problems such as wiping unevenness on the wiping surface 100 and abnormal noise. Further, the wiping surface 100 can be wiped cleanly, and it is possible to reliably prevent the wiping surface 100 from being left unwiped.

  (E) According to this embodiment, even if the curvature of the wiping surface 100 changes, the secondary lever 32 and the yoke lever 33 that hold the blade rubber 36 are at appropriate angles with respect to the tip movable lever 37 and the base lever 36, respectively. Therefore, the entire blade rubber 35 can be made to follow the wiping surface 100 further. Therefore, it is possible to reliably prevent problems such as wiping unevenness on the wiping surface 100 and abnormal noise. Further, the wiping surface 100 can be wiped cleanly, and it is possible to reliably prevent the wiping surface 100 from being left unwiped.

The embodiment of the present invention can be modified as follows.
(1) In the above embodiment, the tip contact portion 34i for turning the tip movable lever 37 around the turning shaft member 39 as the center of rotation has been described as being formed on the connecting member 34. However, the present invention is not limited to this. In addition, the tip contact portion 34 i may be formed integrally with the arm piece 25.

  (2) In the above embodiment, the lower end 37b of the rear end contact portion 37a is pushed up by the front end contact portion 34i, so that the front end movable lever 37 is simply rotated. However, the present invention is not limited to this. Is not to be done. In addition, an elastic member such as a spring or rubber that generates a weak pressing force between the primary lever 31 and the secondary lever 32 or between the secondary lever 32 and the yoke lever 33 is added to the configuration of the above embodiment. You may combine.

  (3) In the above embodiment, the portion with a small curvature on the wiping surface 100 (the portion indicated by the curve L1) corresponds to the upper reversal position of the wiper blade 3, and the portion with the large curvature on the wiping surface 100 (the portion indicated by the curve L2). However, the present invention is not limited to this. In addition to this, a portion with a small curvature (the portion indicated by the curve L1) on the wiping surface 100 corresponds to the lower inversion position of the wiper blade 3, and a portion with a large curvature (the portion indicated by the curve L2) on the wiping surface 100 is the wiper blade. Of course, it may correspond to the upper reversal position of 3.

The technical ideas other than the claims that can be grasped from the above embodiments will be described below.
A wiper device for a vehicle, comprising: a wiper motor; a link mechanism that transmits an output of the wiper motor; a plurality of wiper pivots coupled to the link mechanism; and a wiper device coupled to the wiper pivot. Furthermore, the wiper apparatus for vehicles characterized by using the wiper apparatus of Claim 5.

It is a top view which shows the whole structure of the wiper apparatus which concerns on one Embodiment of this invention. It is the side view which looked at the wiper device concerning one embodiment of the present invention from the AA direction of Drawing 1. It is a principal part enlarged top view which shows the structure of the longitudinal direction center part of the wiper blade which concerns on one Embodiment of this invention. It is a principal part expanded side view which shows the structure of the longitudinal direction center part of the wiper blade which concerns on one Embodiment of this invention. It is explanatory drawing explaining operation | movement of the wiper blade shown in FIG. It is a figure which shows the structure of the wiper apparatus for vehicles which concerns on one Embodiment of this invention. It is explanatory drawing which shows a mode that the wiper blade which concerns on one Embodiment of this invention wipes the part with a small curvature in a wiping surface. It is explanatory drawing which shows a mode that the wiper blade which concerns on one Embodiment of this invention is wiping the part with a big curvature in a wiping surface.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wiper apparatus, 2 Wiper arm, 3 Wiper blade, 21 Arm head, 22 Rotating shaft member, 23 Arm member, 24 Retainer, 25 Arm piece, 25a Hook part, 25b Engagement hole, 26 Spring, 31 Primary lever, 32 Secondary Lever, 33 Yoke lever, 33a Holding piece, 34 Connecting member, 34a, 34b Side surface part, 34c Connecting part, 34d Shaft insertion hole, 34e Elastic piece, 34f Engaging protrusion, 34g, 34h Extending part, 34i Tip contact part , 35 Blade rubber, 36 Base lever, 36a, 36b, 36c Side surface, 36d Housing portion, 36e, 36f Side surface extension portion, 36g Rotating shaft member, 37 Front end movable lever, 37a Rear end contact portion, 37b Lower surface, 38 Connecting shaft member, 39 rotating shaft member, 40 vehicle wiper device, 4 Pipe frame, 41a mounting portion 42 wiper motor, 42a output shaft, 43 link mechanism, 43a crank arm, 43b link rod, 44 wiper pivot, 44a pivot shaft, 44b pivot lever, 100 wiping surface, 101 top portion

Claims (5)

Blade rubber to wipe the wiping surface;
A wiper blade configured to have a lever assembly connected to an arm member and holding the blade rubber,
The lever assembly includes a base lever rotatably connected to the arm member via a connecting shaft member;
A distal end movable lever coupled to the distal end side of the wiper device relative to the coupling shaft member of the base lever via a first pivot shaft member so as to be pivotable in a direction contacting and separating from the wiping surface;
A first straight line connecting the connecting shaft member and a second rotating shaft member that rotatably connects the arm member to the arm head, and a third rotation that rotatably connects a lower lever to the base lever. A wiper blade, wherein the tip movable lever is rotated in a direction to come in contact with and away from the wiping surface based on an angle formed between a shaft member and a second straight line connecting the connecting shaft member. The lever assembly includes a connecting member connected to the arm member and rotatably supported by the connecting shaft member;
The distal end movable lever is formed with a rear end abutting portion extending to the connecting member side with respect to the first rotation shaft member,
The front end abutting portion is formed on the connecting member so as to extend from the connecting shaft member toward the front end movable lever side and abut on the wiping surface side of the rear end abutting portion. The wiper blade described.   3. The wiper blade according to claim 1, wherein the first rotation shaft member is provided on a distal end side of the wiper device with respect to a top portion of the wiping surface.   3. The wiper according to claim 1, wherein the lever assembly includes a lower lever that is rotatably connected to the tip movable lever and the base lever and holds the blade rubber. 4. blade. An arm head fixed to the pivot shaft;
An arm member connected to the arm head so as to be able to rotate in a direction in contact with and away from the wiping surface;
A wiper device configured to have a wiper blade connected to the tip of the arm member,
A wiper device using the wiper blade according to any one of claims 1 to 4 as the wiper blade.

Images