JP2019031142A - Wiper blade - Google Patents

Abstract

To provide a wiper blade which suppresses sound or impact at reversing, is hard to generate an antinode wiping phenomenon, and is excellent in a wiping property.SOLUTION: A wiper blade 1 has a blade driver 2 placed on a glass surface 5a; and a rubber holder 3 which holds the blade rubber 2. The blade rubber 2 has a superstructure portion 11 held by the rubber holder 3; a wiping portion 12 for wiping the glass surface 5a; and a neck portion 13 which connects the superstructure portion 11 and the wiping portion 12. At both end portions in a width direction of the wiping portion 12, lip portions 14a and 14b contacting with the glass surface 5a are provided. The lip portions 14a and 14b are formed in a shape with a triangular cross section in which a tip end portion is a generally right angle, and contact with the glass surface 5a at a contact angle of about 45°.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a wiper blade used in a vehicle wiper device, and more particularly to a cross-sectional structure of a blade rubber attached to the wiper blade.

  A vehicle such as an automobile is provided with a wiper device for wiping off water droplets, snow, and the like attached to the windshield in order to ensure the driver's visibility in rainy weather. The wiper device has a wiper arm driven by a wiper motor, and a wiper blade to which a rubber blade rubber is attached is attached to the tip of the wiper arm. The blade rubber is pressed against the windshield glass by a spring provided on the wiper arm, and moves on the glass surface along with the reciprocating motion of the wiper arm, and wipes and removes raindrops and the like.

  In such a wiper apparatus, conventionally, a wiper blade called a tournament specification has been widely used. The tournament specification has a structure like a combination table of a tournament game, and is configured to support the blade rubber at multiple points (usually four or more) along the longitudinal direction. In recent years, in addition to the tournament specifications, a wiper blade called a flat type (flat type) in which a blade rubber and a rubber holder are integrated is also frequently used. Flat type wiper blades are widely used mainly in luxury cars due to their excellent design, and the number of parts is also smaller than in tournament specifications, so the number of models that use them is also increasing. .

JP 2000-255389 A

  However, since the flat type wiper blade is configured to support the blade rubber at one central point or two left and right points, the distributed pressure in the blade longitudinal direction is uneven compared to the tournament structure. There is a problem. In other words, the support at one central point tends to increase the pressing force at the center of the blade (FIG. 7 (a)), and the support at the two left and right points has a pressing force just below the support point. There is a tendency to increase (FIG. 7B). Further, the flat type wiper blade has low robustness against the arm pressing force, and there is a problem that the distribution pressure at the support point portion is largely changed by the change of the arm pressing force.

  On the other hand, in order to ensure the wiping performance of the wiper blade, it is necessary to set the blade pressure on the basis of the portion where the pressing force is low. However, if such a setting is made, the pressure is excessive in the portion where the pressing force is high, the blade rubber is strongly pressed against the glass surface, and the contact angle of the blade rubber (the angle between the blade rubber and the glass surface) becomes small. . At this time, as shown in FIG. 8A, in the conventional wiper blade 51, when the contact angle θc is 12 ° or less, the lip portion 53 at the tip of the blade rubber 52 lies sideways, and the lip side surface 54 has a glass surface 55. So-called belly wiping for wiping off is likely to occur. That is, in the conventional flat type wiper blade, since the distribution pressure is uneven and easily changed, a belly wiping phenomenon is likely to occur, which is one cause of wiping failure.

  Further, in the conventional wiper blade 51, since the lip portion 53 is formed in a narrow fin shape, when the blade traveling direction is reversed at the upside down position, as shown in FIG. 53 postures change in the opposite direction. For this reason, due to the reversing operation of the lip portion 53 and the impact load due to the vertical vibration at the time of reversal, a large reversing sound is produced at the vertical reversal position, or the lip portion 53 is deformed by the impact load and the belly wiping is performed in the subsequent operation There were also problems such as being easy to occur.

  On the other hand, in the wiper blade of Patent Document 1, the blade rubber is provided with a neck portion for preventing the wiping surface pressure contact portion from standing upright, and the inclination of the wiping surface pressure contact portion is regulated. As a result, the wiping operation is performed without causing unwiping or wiper judder, and a quiet wiping operation is performed without generating a reverse sound. However, in the case of the configuration of Patent Document 1, since the inclination angle of the wiping surface pressure contact portion is restricted, when wiping a wiping surface having a curved surface, followability to the wiping surface is impaired, and unwiping and wiper judder are eliminated. There was a problem that it was not done.

  An object of the present invention is to provide a wiper blade excellent in wiping performance, in which sound and impact at the time of reversal are suppressed to a small extent, and a stomach wiping phenomenon is hardly caused.

  A wiper blade of the present invention is a wiper blade that is attached to a wiper arm and is placed on a wiping surface of a vehicle, and a rubber holder that holds the blade rubber. A roof portion held by a rubber holder, a wiping portion for wiping the wiping surface, and a neck portion connecting the roof portion and the wiping portion, the wiping portion being the wiping portion It has the lip | rip part which contacts a surface, It is characterized by the above-mentioned.

  In the present invention, the wiping portion of the blade rubber is provided with a plurality of lip portions that come into contact with the wiping surface, so that the wiping portion is supported on the wiping surface by the plurality of lip portions, compared to the conventional blade rubber. Therefore, it will be difficult to fall sideways. Thereby, a stomach wiping phenomenon is suppressed and wiping property is improved.

  In the wiper blade, one lip portion may be provided at each of both ends of the wiping portion in the operation direction of the wiper blade. Thus, if a lip part is arrange | positioned at the both ends of a wiping part, a wiping part will be stably supported on a wiping surface and the contact angle of the lip part with respect to a wiping surface will be stabilized.

  In addition, the shed portion is provided with a shed main body attached to the rubber holder, and a protruding portion provided on the wiping surface side of the shed main body, and the operation direction of the wiper blade in the wiping portion The width along the line may be larger than the protruding portion. Thus, if the width | variety of a wiping part is set widely, a wiping part will be supported more stably, a lateral fall will be suppressed, and a contact angle will also be stabilized.

  The wiping portion is provided with a lip base connected to the neck portion and the lip portion formed on the lip base, and the lip base extends from the connection portion with the neck portion toward the wiping surface side. An inclined wall may be formed. Thereby, running wind presses an inclined wall, a lip part adheres to a wiping surface, and improvement in wiping property is aimed at.

  The lip portion is formed in a triangular shape with the wiping surface side as an apex, and the cross section of the tip portion of the lip portion including the apex is formed at a substantially right angle across the apex, and the blade rubber is formed You may make it the said front-end | tip part contact this wiping surface when it mounts on the said wiping surface. Thereby, the contact angle of a lip | rip part and a wiping surface can be maintained at about 45 degrees, and the wiping property is improved.

  A cross section of the blade rubber in the operation direction of the wiper blade may be formed symmetrically with respect to the center line ML of the neck portion. Thereby, it becomes easy to consider the balance of moments generated by the vertical drag of the vertical load received by the lip portion from the wiper arm and the frictional force received from the wiping surface.

  The bending rigidity in the operation direction of the wiper blade in the neck part may be smaller than the bending rigidity of the wiping part, whereby the neck part moves flexibly and the lip part follows the curvature of the wiping surface. Wiping operation is performed, and unwiping and wiper judder are less likely to occur.

  According to the wiper blade of the present invention, the wiping portion of the blade rubber is provided with a plurality of lip portions that come into contact with the wiping surface, so that the wiping portion is supported on the wiping surface by the plurality of lip portions, Compared to this, it is less likely to cause a lateral fall. As a result, the belly wiping phenomenon is suppressed, and the wiping performance of the wiper blade can be improved.

It is explanatory drawing which shows the structure of the wiper blade which is one embodiment of this invention. It is explanatory drawing which shows the cross-sectional structure of the wiper blade of FIG. It is explanatory drawing which shows the force added to a blade rubber during wiping operation. It is explanatory drawing which shows the fluctuation state of the wiping angle in wiping operation | movement. It is explanatory drawing which showed the relationship between the frequency of the generated sound of a wiper blade, and the acceleration of the up-down direction of a wiper blade. It is explanatory drawing which shows the modification of a blade rubber. It is explanatory drawing which shows the distributed pressure in the conventional flat type wiper blade. It is explanatory drawing which shows the structure of the conventional wiper blade.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an explanatory view showing an overall configuration of a wiper blade 1 according to an embodiment of the present invention, and FIG. 2 shows a cross section of the wiper blade 1 (a cross section perpendicular to the longitudinal direction, hereinafter the cross section agrees). It is explanatory drawing. The wiper blade 1 is a so-called flat type wiper blade, and has a structure in which a blade rubber 2 and a rubber holder 3 are integrated. The wiper blade 1 is attached to a wiper arm 4 and disposed on a windshield glass (so-called windshield: wiping surface) 5 of an automobile. Along with the wiper operation, the wiper blade 1 reciprocates on the windshield glass 5 to wipe away water droplets and dirt on the glass surface 5a.

  The blade rubber 2 is a rubber member extending in the longitudinal direction, and is placed on the windshield glass 5. The cross-sectional shape of the blade rubber 2 (see FIG. 2) is a uniform shape over the entire length, and is attached to the lower surface side of the rubber holder 3. As shown in FIG. 2, the blade rubber 2 connects the roof portion 11 held by the rubber holder 3, the wiping portion 12 for wiping the windshield glass 5, and the roof portion 11 and the wiping portion 12. The neck part 13 to be provided is provided. The neck portion 13 is formed with a narrow width so that the bending rigidity in the width direction (the operation direction of the wiper blade 1) is smaller than that of the wiping portion 12. The wiper blade 1 employs a neck structure, and the rigidity of the neck portion 13 itself is set small, so that the neck portion 13 moves flexibly during the wiping operation, and the wiping portion 12 follows the curvature of the glass surface 5a. Works.

  The shed portion 11 is composed of a shed main body 11a and a protruding portion 11b. The shed main body 11 a is attached to a rubber attachment portion 21 formed in the rubber holder 3. The protruding portion 11b is formed in a convex shape and protrudes downward from the roof main body 11a (the glass surface 5a side) in FIG. The rubber attaching portion 21 extends along the longitudinal direction, and the blade rubber 2 is attached from the end of the rubber holder 3 in such a manner that the upper body 11 a is inserted into the rubber attaching portion 21. At this time, the projecting portion 11 b is arranged in a state of projecting downward from the lower surface of the rubber holder 3. End caps 6 are attached to both ends of the rubber holder 3 to prevent the blade rubber 2 from falling off.

  As shown in FIG. 2, the rubber holder 3 includes a holder main body 22 and fin portions 23. The holder main body 22 and the fin portion 23 are integrated by two-color molding of different materials having different hardnesses. The holder body 22 is a plastic having flexibility in order to be able to follow the curved shape (not shown) of the windshield glass 5 while ensuring sufficient strength that can hold the upper portion 11 of the blade rubber 2. It is formed of a resin material such as. On the other hand, the fin portion 23 is formed of an elastic material such as rubber having a hardness lower than that of the holder body 22. When the traveling wind hits the front side 23a of the fin portion 23, down force (force to push the blade rubber 2 toward the glass surface 5a) is generated in the wiper blade 1, and the blade is less likely to float during traveling. The wiping performance of is maintained well.

  Inside the holder main body 22, a pair of vertebra 24 formed of a steel plate having spring properties is provided. Each vertebra 24 is disposed so as to sandwich the upper portion 11 of the blade rubber 2 from the forward path side and the return path side. Each natural bra 24 is curved with a curvature (tight curve) larger than the curvature of the windshield glass 5 in a natural state where no external force is applied. When the wiper blade 1 is arranged on the windshield glass 5, the vertebra 24 is elastically deformed in accordance with the curvature of the windshield glass 5. Thereby, the rubber holder 3 and the blade rubber 2 are deformed along the glass surface 5a, and the wiping portion 12 of the blade rubber 2 is pressed against and closely contacts the glass surface 5a over the entire length.

  An arm attachment portion 26 having a metal center bracket 25 is provided at a middle portion in the longitudinal direction of the rubber holder 3. The center bracket 25 has a substantially U-shaped cross section and is fixed to the vertebra 24 by caulking. An arm hook mounting portion 27 made of synthetic resin is rotatably attached to the center bracket 25. The center bracket 25 is attached to the distal end portion of the wiper arm 4 via the arm hook attachment portion 27. As a result, the wiper blade 1 is attached to the tip of the wiper arm 4 in a rotatable state.

  Here, in the wiper blade 1 of the present invention, the wiping portion 12 is provided with a plurality of lip portions 14 that are in contact with the glass surface 5a (here, two; lip portions 14a and 14b). The wiping portion 12 includes a lip base 15 connected to the lower end side of the neck portion 13, and lip portions 14a and 14b protruding from both ends of the lip base 15 in the width direction (wiper blade operation direction). It has a bifurcated shape as shown in FIG. The lip base 15 and the lip portions 14 a and 14 b are formed symmetrically with respect to the center line ML of the neck portion 13. The width W2 of the wiping portion 12 is larger than the width W1 of the protruding portion 11b, and the blade rubber 2 is formed on the glass surface 5a by the lip portions 14a and 14b arranged at both ends of the wide wiping portion 12. Supported.

  Side surfaces of the lip base 15 (front and rear surfaces facing the wiper operation direction) are inclined walls 16 (16a, 16b) extending from the connecting portion between the lip base 15 and the neck portion 13 toward the glass surface 5a. The inclined wall 16 is subjected to traveling wind from the front while the vehicle is traveling. When the wiper blade 1 receives the traveling wind at the inclined wall 16, the wiping portion 12 is pressed by the wind pressure, and the lip portions 14a and 14b are in close contact with the glass surface 5a.

  Each lip part 14a, 14b is formed in the cross-sectional substantially triangular shape which makes the glass surface 5a side a vertex (vertex P). The front end portions 17a and 17b of the lip portions 14a and 14b including the apex P are formed so that the cross sections thereof are formed at substantially right angles across the apex P. When the wiper blade 1 is disposed on the windshield glass 5, the glass surface 5a Contact with. In this way, the lip portions 14a and 14b are triangular in cross section, and the inner angle of the tip portions 17a and 17b is 90 °, so that the contact angle θc between the lip portions 14a and 14b and the glass surface 5a is approximately 45 °. Is set.

Further, in the blade rubber 2, the lip portions 14a and 14b are prevented from falling down by suppressing the force (moment) acting in the direction in which the wiping portion 12 is laid down during the wiping operation. FIG. 3 is an explanatory diagram showing the force applied to the blade rubber 2 during the wiping operation. As shown in FIG. 3, during the wiping operation of the wiper blade 1, the lip portions 14a and 14b have a vertical load N from the glass surface 5a (a vertical drag of a vertical load by the wiper arm) and a frictional force μN between the glass surface 5a. Will be added. At this time, the force (moment M) for laying down the wiping portion 12 is L1 as the horizontal distance from the point O to the lip portions 14a and 14b with respect to the rotation center O, and L2 as the vertical distance.
M = -L1 ・ N + L2 ・ μN (Moment in the sideways direction is positive)
It becomes. Since the lip base 15 and the lip portions 14a and 14b are symmetrical with respect to the center line ML, only one side will be described here. However, with this symmetrical arrangement, the balance of moment is taken into consideration. It becomes easy.

  In this case, since the friction coefficient μ changes depending on the state of the glass surface (WET: about 0.1, DRY: about 0.4), the value of the moment M is not uniformly determined, but from the above formula It can be seen that if L1 is increased and L2 is decreased, M decreases. That is, it is preferable to arrange the lip portions 14a and 14b far from the center line ML and close to the base portion of the neck portion 13 (the position of the point O). However, if L1 is too large, the entire width of the blade rubber 2 is increased and the blade size is increased. Moreover, when L2 is too small, the distance between the rubber holder 3 and the glass surface 5a will become too narrow.

  Therefore, in the wiper blade 1, considering the balance between them, the distance L1 (the horizontal distance from the rotation center O to the lip portions 14a and 14b) is set to half W1 / the width W1 of the protruding portion 11b of the roof portion 11. Larger than 2. As a result, the value of the first item in the above equation is increased, and the moment (the clockwise moment in FIG. 3) that resists the force of lying down the lip portions 14a and 14b with respect to the moving direction is increased. For this reason, the moment M in the sideways direction is reduced, and accordingly, the sideways falling of the lip portions 14a and 14b is suppressed. On the other hand, when setting L1, the total width W2 of the wiping portion 12 is set to be equal to or smaller than the width W3 of the roof portion 11 so that the value does not become excessive. In addition, the distance L2 is set so that the height H1 below the roof portion 11 (the height of the neck portion 13 and the wiping portion 12 combined) is ½ of W2, and L2 does not become too small. Adjust as follows.

  Further, in the blade rubber 2, the overall height dimension Hg is suppressed to be lower than that of the conventional blade rubber 52 (about 0.6 times: about 10 mm in the related art and about 6 mm in the present invention). Since the wiper blade 1 does not easily fall sideways, it is not necessary to provide a restricting portion or a restricting member that suppresses a decrease in the contact angle θc, and the wiper blade can be reduced in size and height accordingly. As a result, the moment in the falling direction applied to the lip portions 14a and 14b can be reduced by friction with the glass surface 5a, and the contact angle θc can be maintained also in this respect. Note that, by reducing the height of the blade rubber 2, the resistance of the traveling wind is also reduced, and the load on the motor is reduced accordingly. Further, the entire wiper blade can be reduced in size.

  In addition, in the wiper blade 1 using the blade rubber 2 as described above, since the glass surface 5a is wiped by the two lip portions 14a and 14b, the posture of the lip portion is not reversed when the blade is reversed. As described above, in the conventional wiper blade, as shown in FIG. 8B, the posture of the lip portion 53 is changed in the reverse direction, which is a cause of the reverse sound and the belly wipe. On the other hand, the wiper blade 1 has a structure in which the lip portions 14a and 14b are not reversed, and hardly moves up and down during the reversal. For this reason, in the wiper blade 1, the reversal noise is reduced as compared with the conventional wiper blade, and the fluctuation of the contact angle after the reversal is also suppressed to be small.

  FIGS. 4A and 4B are explanatory views showing the fluctuation state of the wiping angle during the wiping operation. FIG. 4A shows the wiper blade 1 of the present invention, and FIG. 4B shows the wiping angle fluctuation of the conventional wiper blade 51. As shown in FIG. 4, according to the inventors' experiment, the wiper blade 1 of the present invention has a smaller variation in the wiping angle than the conventional wiper blade 51 (65 ° → 10 °). Further, as can be seen from each enlarged view, the wiper blade 1 does not have an abrupt change (rapid drop) as in the conventional case. Also from this figure, it can be seen that the wiper blade 1 has a smaller variation in the contact angle at the time of wiping than before, and the vertical movement at the time of reversal is greatly suppressed, and the reversing sound is reduced accordingly. In addition, since there is no drop in the contact angle after reversal, even if there is a change in the arm pressing force, reversal noise and belly wiping are suppressed, the robustness against changes in the arm pressing force is improved, and in flat type wiper blades The wiping performance is improved.

FIG. 5 is an explanatory diagram showing the relationship between the frequency of the generated sound of the wiper blade and the acceleration in the vertical direction of the wiper blade. FIG. 5 (a) shows the wiper blade 1 of the present invention, and FIG. The acceleration of the wiper blade 51 is shown respectively. FIG. 5 shows for which frequency the acceleration is large from the acceleration waveform (time history) in the vertical direction of the wiper blade. Usually, since the frequency of the blade reversal sound is near 100 Hz, the acceleration of the wiper blade 1 of the present invention is smaller than that of the conventional wiper blade 51 (1000 mm / s ² → 60 mm / s ^2). ). In this case, when the vertical acceleration of the wiper blade is reduced, the vibration of the glass surface 5a is reduced, and the inversion sound due to the vibration of the glass is reduced. That is, as the acceleration decreases, the reversal sound decreases. As can be seen from FIG. 5, according to the experiments by the inventors, the acceleration in the vicinity of 100 Hz is significantly smaller in the wiper blade 1 than in the conventional wiper blade. Therefore, the inversion sound is reduced correspondingly, and the quietness of the wiper device is improved.

  As described above, the blade rubber 2 is shaped such that the wiping portion 12 is stretched on the glass surface 5a by providing the two lip portions 14a and 14b. For this reason, as compared with the conventional blade rubber 52 (see FIG. 8), it is difficult for the body to fall down and the wiping portion 12 is not easily tilted even when an impact load is applied. As a result, the contact angle θc between the lip portions 14a and 14b and the glass surface 5a at the time of wiping can be stably maintained in the vicinity of about 45 °, the belly wiping phenomenon can be suppressed, and the wiping property can be improved. In addition, since it is not necessary to provide a restricting portion or a restricting member that suppresses a decrease in the contact angle due to the lateral tilt, the wiper blade can be reduced in size and height, and the lateral tilt is less likely to occur.

  Further, by narrowing the neck portion 13 (about 1/5 of the protruding portion 11b) and reducing the rigidity of the lip portions 14a, 14b, the lip portions 14a, 14b operate along the curvature of the glass surface 5a. Since the followability of the blade rubber 2 is improved, the contact angle θc is easily maintained, and wiping residue and wiper judder are less likely to occur. In addition, in the blade rubber 2, the change in the contact angle during wiping is small, and the wiping portion 12 hardly moves up and down during reversal, so that the reverse sound is reduced and the belly wiping is suppressed, and the arm pressing force changes. The robustness against is improved.

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, the dimensions (height Hg and the like) of the blade rubber in the above-described embodiment are merely examples, and the wiper blade of the present invention is not limited to the above dimensions. Further, in the blade rubber 2, a configuration in which two lip portions 14 are provided at both ends of the lip base 15 is shown. However, even if a lip portion having a right-angled triangular cross section is further added between the lip portions 14a and 14b. good. For example, it is possible to arrange one piece at the center between the lip portions 14a and 14b, or two pieces equally.

  On the other hand, in the blade rubber 2 described above, the example in which the neck portion 13 and the wiping portion 12 are symmetric with respect to the center line ML is shown. For example, as illustrated in FIG. It is also possible to adopt a left-right asymmetric configuration so as to increase. In the blade rubber 31 of FIG. 6, the extending portion 32 is provided on the inclined wall 16a on the lower inversion position side of the lip base 15, so that the area of the inclined wall 16 on the side receiving the traveling wind is increased. As described above, a pressing force is generated in the blade rubber 2 by the traveling wind pressure, and a down force acts to suppress the wiper blade 1 from being lifted. Therefore, the blade rubber 31 of FIG. 6 is provided with the extending portion 32 on the inclined wall 16a, thereby increasing the pressure receiving area and increasing the down force (pressure × area).

  In general, in a wiper device, traveling wind flows from the center of the windshield glass toward the outside during high-speed traveling, so that when the wiper blade moves from the upper reversing position to the lower reversing position, lift occurs in the direction to lift the blade. . When the wiper blade is lifted by this lifting force, the blade rubber is separated from the glass surface, and the wiping performance is lowered. On the other hand, the blade rubber 31 increases the downforce that efficiently receives the traveling wind and presses the blade rubber 2 against the glass surface 5a by increasing the area of the inclined wall 16a located on the lower inversion position side. . As a result, the blade rubber 2 is less likely to float during traveling, and in particular, the wiping performance of the wiper blade during high-speed traveling can be improved.

  The present invention is widely applicable not only to wiper blades of automobiles but also to wiper blades that are generally installed in vehicles such as industrial equipment and railway vehicles.

DESCRIPTION OF SYMBOLS 1 Wiper blade 2 Blade rubber 3 Rubber holder 4 Wiper arm 5 Windshield glass 5a Glass surface (wiping surface)
6 End cap 11 Roof part 11a Roof body 11b Protruding part 12 Wiping part 13 Neck part 14 Lip parts 14a, 14b Lip part 15 Lip base 16 Inclined walls 16a, 16b Inclined walls 17a, 17b Tip part 21 Rubber mounting part 22 Holder body 23 Fin portion 23a Front side 24 Vertibra 25 Center bracket 26 Arm mounting portion 27 Arm hook mounting portion 31 Blade rubber 32 Extension portion 51 Wiper blade 52 Blade rubber 53 Lip portion 54 Lip side surface 55 Glass surface Hg Overall blade rubber Height dimension H1 Height P of the part below the roof part Lip part apex W1 Dimension in the width direction of the projecting part W2 Dimension in the width direction of the wiping part W3 Dimension in the width direction of the roof part ML Center line O Rotation center L1 Horizontal distance from the center of rotation to the lip L2 Vertical from the center of rotation to the lip Distance N Vertical load θc Contact angle between lip and glass surface

Claims (7)

A wiper blade having a blade rubber mounted on a wiper arm and placed on a wiping surface of a vehicle, and a rubber holder for holding the blade rubber,
The blade rubber has a roof part held by the rubber holder, a wiping part for wiping the wiping surface, and a neck part connecting the roof part and the wiping part,
The wiper blade has a plurality of lip portions that come into contact with the wiping surface. The wiper blade according to claim 1, wherein
The wiper blade according to claim 1, wherein at least one lip portion is provided at each of both ends of the wiping portion in the operation direction of the wiper blade. The wiper blade according to claim 2,
The shed part has a shed main body attached to the rubber holder, and a projecting part provided on the wiping surface side of the shed main body,
The wiper blade is characterized in that the wiping portion has a larger width along the operation direction of the wiper blade than the protruding portion. In the wiper blade according to any one of claims 1 to 3,
The wiping portion has a lip base connected to the neck portion, and the lip portion formed on the lip base,
The wiper blade according to claim 1, wherein the lip base has an inclined wall extending from a connection portion with the neck portion toward the wiping surface. In the wiper blade according to any one of claims 1 to 4,
The lip portion is formed in a triangular cross-section with the wiping surface side as an apex,
The tip of the lip portion including the apex has a cross section formed substantially at right angles across the apex, and contacts the wiping surface when the blade rubber is placed on the wiping surface. Wiper blade. In the wiper blade according to any one of claims 1 to 5,
The wiper blade is characterized in that a cross section of the wiper blade in an operation direction is symmetrical with respect to a center line ML of the neck portion. In the wiper blade according to any one of claims 1 to 6,
The wiper blade according to claim 1, wherein a bending stiffness of the wiper blade in the operation direction in the neck portion is smaller than the bending stiffness of the wiping portion.

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