JP4784437B2 - Wiper blade - Google Patents

Description

  The present invention relates to a wiper blade having a configuration in which a long blade lever is held by a plurality of holding means provided on a long frame member.

Conventionally, for example, to wipe a wiping surface such as a windshield of a vehicle, it is widely known to use a wiper having a wiper blade that slides on the wiping surface. As such a wiper, the long blade rubber head that wipes the wiping surface has a long shape along the wiper blade so that the blade rubber swings along a plane perpendicular to the longitudinal direction of the blade rubber. What is hold | maintained by the holding means provided in this frame member is known (for example, refer patent document 1). In this wiper blade, when the blade rubber is swung along the wiping surface, the entire blade rubber is inclined toward the rear side in the moving direction and can slide on the wiping surface at an appropriate inclination angle. It is possible to wipe the wiping surface well without depending on only.
Japanese Patent Laid-Open No. 2002-12130

  By the way, since a relative air flow is generated on the wiping surface of the vehicle as the vehicle travels, traveling wind is generated as the vehicle travels when viewed from the vehicle side.

  Here, for example, when the wiping surface is constituted by a windshield, traveling wind from the front to the rear of the vehicle is generated on the wiping surface, but the wiper blade is generally at the lower end of the windshield. Since it is reciprocated by swinging around the axis provided at the lower end portion from the position along, it moves while receiving a pressing force from the traveling wind on the forward path, and moves against the traveling wind on the return path Will be.

  However, in the conventional wiper blade, the blade rubber can be swung within a certain range with respect to the frame member regardless of the moving direction. Pressure is applied and the blade rubber may slide on the wiping surface at an inclination angle smaller than the appropriate inclination angle with respect to the wiping surface, and moves against the traveling wind along the wiping surface on the return path By doing so, there is a possibility that a force that separates from the wiping surface, that is, a force that lifts from the wiping surface (lifting force from the wiping surface) is applied, and the wiping surface cannot be properly slid. This is particularly noticeable when the vehicle is traveling at a high speed because the strength of the traveling wind changes according to the vehicle speed.

  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 capable of appropriately wiping the wiping surface regardless of the reciprocating movement direction.

  In order to solve the above-mentioned problem, the wiper blade according to claim 1 has a long shape for wiping the wiping surface of the vehicle, and the lower portion is slid on the wiping surface when viewed in a cross section perpendicular to the longitudinal direction. A blade rubber having a wiping portion provided and a head portion provided on the upper portion; a frame member extending along a longitudinal direction of the blade rubber; and spaced apart from each other along the longitudinal direction of the frame member. A wiper blade that is provided on the frame member and has a plurality of holding means for holding the head portion of the blade rubber, and is reciprocated on the wiping surface in a direction intersecting the longitudinal direction of the blade rubber. The holding means is configured so that when viewed in the width direction perpendicular to the longitudinal direction of the blade rubber, the blade rubber is arranged so that the inclination angle of the blade rubber with respect to the wiping surface differs between the forward path and the return path. Characterized in that it holds the head of the chromatography.

  A wiper blade according to a second aspect is the wiper blade according to the first aspect, wherein one of the forward path and the return path resists traveling wind generated on the wiping surface as the vehicle travels. The holding means is configured such that, of the forward path and the backward path, the other path is viewed in the width direction perpendicular to the longitudinal direction rather than the one path including the direction against running wind. In addition, an inclination angle of the blade rubber with respect to the wiping surface is set to be large.

  The wiper blade according to claim 3 is the wiper blade according to claim 1 or 2, wherein the holding means includes the blade rubber along a surface including the reciprocating direction and perpendicular to the wiping surface. The posture in which the blade rubber can swing and the vertical direction of the blade rubber coincides with the direction perpendicular to the wiping surface is defined as a reference posture, and the swing allowable range from the reference posture to the forward path side and from the reference posture to the forward path side. The head of the blade rubber is held so that the swing allowable range is different.

  The wiper blade according to claim 4 is the wiper blade according to claim 3, wherein the head portion of the blade rubber is provided with a pair of flange portions extending in the reciprocating direction. The holding means includes a forward lower locking wall that comes into contact with the forward flange to limit the downward movement of the forward flange when the blade rubber is moving in the forward direction, and the blade When the rubber is moving on the return path, the return path lower side locking wall that comes into contact with the return path side flange part to limit the downward movement of the return path side flange part, and the forward path lower side locking wall are When the forward path side flange portion is locked and when the return path lower side locking wall is locking the return path side flange portion, the head moves upward with the locking portion as a swing shaft. To limit that And an interval between the upper locking wall and the forward lower locking wall is different from an interval between the upper locking wall and the backward lower locking wall. It is characterized by.

  The wiper blade according to claim 5 is the wiper blade according to claim 4, wherein the pair of flange portions have a blade rubber insertion space extending in a longitudinal direction of the blade rubber. The cover member is formed integrally with a long cylindrical body made of resin or metal that can hold the head.

  A wiper blade according to a sixth aspect is the wiper blade according to any one of the first to fifth aspects, wherein the holding means is seen in the longitudinal direction in at least a part of the frame member. The inclination angle of the blade rubber with respect to the wiping surface is set to be smaller when the installation position on the frame member is closer to both ends with respect to the center portion.

  The wiper blade according to claim 7 is the wiper blade according to any one of claims 1 to 5, wherein the holding means is seen in the longitudinal direction in at least a part of the frame member. The blade rubber is set so that an inclination angle of the blade rubber with respect to the wiping surface is different depending on an installation position on the frame member.

  The wiper blade according to claim 8 is the wiper blade according to any one of claims 1 to 7, wherein the frame member is provided with a snow cover member. .

  According to the first aspect of the invention, since the holding portion holds the blade rubber head so that the inclination angle of the blade rubber with respect to the wiping surface is different between the forward path and the backward path, for example, wiping is performed between the forward path and the backward path. By considering the influence of the traveling wind that applies forces in the direction opposite to the pressing force or buoyancy on the surface, the wiping surface can be appropriately wiped with the blade rubber regardless of the reciprocating movement direction.

  According to the invention of claim 2, since the inclination angle of the blade rubber with respect to the wiping surface is small on the one path including the direction against the traveling wind, the blade rubber is lifted by the lifting force from the wiping surface against the traveling wind. Since the reduction of the pressing force on the wiping surface can be compensated by the small inclination angle, the blade rubber can slide appropriately on the wiping surface.

  In addition, since the inclination angle of the blade rubber with respect to the wiping surface is small on one of the paths including the direction against the traveling wind, the front projection area viewed from the traveling direction can be reduced, so that it resists the traveling wind. The lift force generated from the wiping surface can be suppressed, and the blade rubber can appropriately slide on the wiping surface.

  Further, in the other path, the inclination angle of the blade rubber with respect to the wiping surface is set to a large angle in consideration of receiving the pressing force from the traveling wind to the wiping surface without considering the inclination angle of the blade rubber in the one path. Since it can be set, the blade rubber can appropriately slide on the wiping surface without affecting the wiping performance of the blade rubber in one path.

  According to the invention of claim 3 and claim 4, by holding the head of the blade rubber so that the swinging allowable range of the blade rubber on the forward path side and the backward path side is different, the forward path and the backward path with respect to the wiping surface Since the blade rubber has a different inclination angle, it can be realized with a simple configuration.

  According to the fifth aspect of the present invention, since the pair of flange portions that come into contact with the holding means each time the reciprocating movement is made of resin or metal, it can be easily formed with appropriate strength.

  According to the invention of claim 6 and claim 7, the wiping portion of the blade rubber can be brought into contact with the wiping surface with a more appropriate pressing force. This is because the wiping surface generally constituted by a windshield of a vehicle does not have a uniform curvature.

  According to the eighth aspect of the present invention, since the frame member is provided with the snow-proof cover member, the wind is properly received when the frame member is reciprocated. By giving a difference in the inclination angle, the wiping surface can be wiped off more effectively. If the frame member is exposed, the wind can be passed through the gap between the frame member itself and the gap between the frame portion and the blade rubber when the frame member is reciprocated. Covers the gap between the frame member itself and the gap between the frame part and the blade rubber in order to prevent snow from entering and adhering to the gap between the frame part and the blade rubber. Because the wind can no longer pass through.

  Embodiments of a wiper blade according to the present invention will be described below with reference to the drawings.

  FIG. 1 is a perspective view schematically illustrating a state in which the wiper blade 10 according to the first embodiment is applied to the vehicle C, FIG. 2 is a perspective view schematically illustrating the wiper blade 10, and FIG. FIG. 2 is a schematic perspective view showing the wiper blade 10 expanded on each component.

  The wiper blade 10 is provided on the vehicle in order to wipe the wiping surface S (a windshield in the first embodiment) made of a windshield or rear glass of the vehicle. As shown in FIGS. 2 and 3, the wiper blade 10 includes a primary lever 11, two secondary levers 12, four yokes 13, a vertebra 14, a blade rubber 15, and two stoppers 16. Yes.

  The wiper blade 10 is fixed to a wiper arm 17 provided in the vehicle C as shown in FIG. Although not shown, the wiper arm 17 is connected to a wiper motor (not shown) via a wiper link (not shown), and can be reciprocated along the wiping surface S by driving the wiper motor (arrow G). , B reference). In the first embodiment, the wiper arm 17 is provided with a swing shaft for reciprocating motion located on the base end side in the vicinity of the lower side of the glass mounting opening constituting the wiping surface S, and is not driven. In the state, the stationary posture I is substantially along the lower side. The wiper blade 10 is mounted on the wiper arm 17 so that when the wiper arm 17 is swung, the direction intersecting the longitudinal direction is the traveling direction. In the first embodiment, the wiper blade 10 is configured such that when the wiper arm 17 is driven, the forward path G swings from the stationary posture I along the wiping surface S upward and backward of the vehicle C, and the end of the forward path G. The wiping surface S is reciprocated along the wiping surface S along the return path B swinging forward and downward of the vehicle C. The wiper blade 10 is provided on the vehicle C by mounting the primary lever 11 at the tip portion 17 a of the wiper arm 17.

  As shown in FIG. 3, the primary lever 11 has a long shape with a substantially U-shaped cross section, and a clip 18 on which the wiper arm 17 can be mounted is swingably provided at a substantially central position 11 a. . A pair of insertion holes 11c are formed at both ends 11b of the primary lever 11, and the secondary levers 12 are pivotally supported by the inserted pins 11d (see FIG. 2).

  Each secondary lever 12 has an elongated shape with a substantially U-shaped cross section, a pair of insertion holes 12b are formed at both ends 12a, and the yokes 13 are respectively swung by the inserted pins 12c (see FIG. 2). It is pivotally supported.

  Each yoke 13 has an elongated shape with a substantially U-shaped cross section, and holding claws 19 as holding means are formed at both end portions 13a. Each holding claw 19 extends in a downward direction in a pair, and its extending end is bent inward to form a vertebra insert space 20 in which the downward opening is formed inward. Yes. The blade rubber 15 to which the vertebra 14 is attached is inserted into the vertebra bra insertion space 20, and the blade rubber 15 is held by each holding claw 19.

  The blade rubber 15 is formed of an elastic member that can slide on the wiping surface S without damaging the wiping surface S, and has a long shape. 4 to 7 are cross-sectional views taken along the line II of FIG. As shown in FIG. 4, the blade rubber 15 includes a wiping portion 15a that is in contact with the wiping surface S, a head portion 15b that is located above the wiping portion 15a, and a neck portion 15c that connects the wiping portion 15a and the head portion 15b. And have. The cross-sectional shape of the wiping portion 15a has a substantially inverted triangular shape, and the cross-sectional shape of the head portion 15b has a rectangular shape. The neck portion 15c forms a recess between the wiping portion 15a and the head portion 15b. The wiping portion 15a is in contact with the wiping surface S at the lower wiping location 15d, and the wiping location 15d is slid on the wiping surface S (see FIGS. 1 and 6). The blade rubber 15 has a so-called lip reversal structure having the above-described shape. In the blade rubber 15, when the blade rubber 15 is reversed while being pressed against the wiping surface S, that is, when the sliding direction to the wiping surface S is changed to the opposite side, the tip of the wiping portion 15 a is By being curved so as to follow the wiping surface S and having an appropriate tilt angle with respect to the wiping surface S, the contact relationship of the wiping location 15d with the wiping surface S is made appropriate.

  As shown in FIG. 3, the vertebra 14 is a long cylinder that extends in a constant cross-sectional shape, and is made of a resin material or a metal material. The vertebra 14 has a bowed shape with respect to the longitudinal direction. When the central portion 14a of the vertebra 14 that is curved like a bow is pushed down to be flattened, the vertebra 14 plays a role of distributing this force and equalizing it when viewed in the longitudinal direction of the vertebra 14. In the wiper blade 10, the vertebra 14 is disposed so that the wiping surface S (see FIG. 1) is positioned in a direction to be pushed down during use. As shown in FIG. 4, the vertebra 14 has a blade rubber insertion space 21, a slit hole 22, and a flange portion 23.

  The blade rubber insertion space 21 is constituted by the inner wall surface of the vertebra 14, has a rectangular parallelepiped shape extending in the longitudinal direction of the vertebra 14 with a certain rectangular cross-sectional shape, and has a lateral width necessary for receiving the head 15 b of the blade rubber 15. Dimensions and height dimensions are secured. The blade rubber insertion space 21 opens both end faces 14b positioned in the longitudinal direction of the vertebra 14 (see FIG. 3). A slit hole 22 is positioned below the blade rubber insertion space 21.

  The slit hole 22 opens the lower wall portion of the vertebra 14 along the extending direction of the vertebra 14 while maintaining a constant interval, and opens the blade rubber insertion space 21 below. The lower wall portion opened by the slit hole 22, that is, the peripheral edge portion of the slit hole 22 is sized so as to be fitted into the pair of neck portions 15 c of the blade rubber 15, and the pair fitted into the both neck portions 15 c. The open end wall portion 24 is configured (see FIGS. 3 and 4).

  When the head 15b of the blade rubber 15 is inserted into the blade rubber insertion space 21, the vertebra 14 has a structure in which the slit hole 22 sandwiches the neck portion 15c of the blade rubber 15, and more specifically, a pair of open ends. The wall portion 24 is configured to fit into the pair of neck portions 15c of the blade rubber 15 so as to sandwich the blade rubber 15, and the blade rubber 15 is configured not to fall down from the blade rubber insertion space 21 downward. Therefore, the vertebra 14 can sandwich the blade rubber 15 so as to be slidable in the longitudinal direction. In this way, the flange part 23 is provided on the vertical bar 14 so that the vertical bar 14 holding the blade rubber 15 is held by the holding claws 19 of the yokes 13.

  In the first embodiment, the flange portions 23 are paired at both sides of the blade rubber insertion space 21, extend in the width direction of the vertebra 14, and have a constant cross-sectional shape along the extension direction of the vertebra 14. It is made up of and extended. When the pair of flange portions 23 positioned on both sides of the blade rubber insertion space 21 are inserted into the vertical rib insertion space 20 formed by the holding claws 19 of the respective yokes 13, the pair of flange portions 23 are The structure is such that it does not fall downward from the vertebra bra insertion space 20 and is held by each holding claw 19.

  A stopper 16 is attached to each end portion 14 c of the vertebra 14 in a state where the blade rubber 15 is held in the blade rubber insertion space 21. Each stopper 16 has a cylindrical receiving portion 16a and a lid portion 16b that closes one end thereof. Each stopper 16 is mounted so that each end 14c of the vertebra 14 is received by the receiving portion 16a, and the lid 16b shields the open end (14b) of the blade rubber insertion space 21 by each end 14c of the vertebra 14. Thereby, each stopper 16 can prevent the blade rubber 15 from falling off from each end face 14b of the vertebra 14 to the outside, and can improve the design of the appearance of each end face 14b of the vertebra 14.

  As described above, the wiper blade 10 has a tournament structure, and the holding claws 19 of the four yokes 13 serve as holding means for holding the head 15b of the blade rubber 15, and the primary lever 11 Two secondary levers 12 and four yokes 13 extend along the blade rubber 15 and serve as a frame member provided with a plurality of holding means.

  The wiper blade 10 according to the present invention is configured such that the inclination angle of the blade rubber 15 with respect to the wiping surface S is different between the forward path G and the backward path B. This will be described below. In the following, on the side surface of the wiper blade 10 positioned in the width direction, the side facing the traveling direction of the forward path G is referred to as the forward path side, and the side facing the traveling direction of the return path B is referred to as the backward path side. 4 to 7, when viewed from the front, the right side is the forward path G side and the left side is the backward path B side.

  As shown in FIG. 5, each holding claw 19 of each yoke 13 has a forward claw side wall portion 30 that extends downward on the forward path side of each yoke 13, and a lower side on the return path side of each yoke 13. The claw side wall portion 31 extending to the claw side, the claw upper wall portion 32 over which both the claw side wall portions 30, 31 are routed upward, and the outward route folded inward at the tips of the both claw side wall portions 30, 31 It has a side claw wall portion 33 and a return side claw wall portion 34.

  The forward pass side hook wall portion 33 and the return pass side hook wall portion 34 are set so as to extend substantially parallel to the wiping surface S when the wiper blade 10 is properly installed in the vehicle C. The forward side claw side wall part 30 and the backward side claw side wall part 31 are set so as to be substantially orthogonal to the adjacent claw hook wall parts 33 and 34, respectively.

  The forward side claw side wall portion 30 and the return side claw side wall portion 31 are set to have different height dimensions when the direction perpendicular to the wiping surface S is the height direction. Each height dimension is set according to a desired value of the inclination angle of the blade rubber 15 with respect to the wiping surface S, and the height dimension of the forward claw side wall part 30 is higher than the return claw side wall part 31. The value is larger than the height dimension. The upper nail wall portion 32 is inclined with respect to the wiping surface S according to the difference in height dimension and the setting positions of the both nail hook wall portions 33 and 34. As described above, in the wiper blade 10, the vertebra bra insertion space 20 has a left-right unequal shape when viewed in a cross-sectional shape along the width direction.

  Next, the operation of the blade rubber 15 in the wiper blade 10 will be described.

  In the wiper blade 10, as described above, the wiping portion 15 d of the wiping portion 15 a of the blade rubber 15 presses the wiping surface S by the pressing force from the wiper arm 17. In this state, when the wiper arm 17 is driven, the wiper blade 10 is reciprocated on the wiping surface S to wipe the wiping surface S. At the time of this reciprocating movement, in the blade rubber 15, the head portion 15 b is held by the yoke 13 constituting a part of the frame member via the vertebra 14, so that the head portion 15 b is driven by the wiper arm 17. And reciprocating along the wiping surface S. However, since the wiping portion 15d of the wiping portion 15a of the blade rubber 15 is in contact with the wiping surface S and slides on the wiping surface S, the head 15b is seen from the head 15b in the traveling direction due to friction with the wiping surface S. Is also moved back and forth along the wiping surface S. In other words, in the blade rubber 15 and the vertebra 14, a swinging force as indicated by an arrow R shown in FIG. 6 acts on the forward path G, and a swinging force indicated by the arrow L shown in FIG. Power will act.

  Here, the vertical bar 14 holding the head portion 15b of the blade rubber 15 has a flange 23 downward from the vertical bar insertion space 20 having an uneven cross-sectional shape formed by the holding claws 19 of the yokes 13. Therefore, the inclination angle of the blade rubber 15 with respect to the wiping surface S differs between the forward path G and the backward path B.

  Specifically, in the case of the forward path G, as shown in FIG. 6, a clockwise swinging force R acts on the blade rubber 15, so that the vertical bar 14 accommodated in the vertical bar insertion space 20 also rotates clockwise. Oscillating force R acts. That is, in the vertebra bra insertion space 20, the forward path side flange portion 23 a moves downward and the return path side flange portion 23 b moves upward. The swinging motion of the vertebra 14 about the abutting portion between the forward path flange portion 23a and the forward path side nail hook wall portion 33 in the state of contact and the return path flange portion 23b in contact with the upper claw wall portion 32 is performed. The angle of inclination of the axis A of the blade rubber 15 with respect to the wiping surface S is set to the angle α. For this reason, when the wiper blade 10 is moving in the forward path G, the blade rubber 15 comes into contact with the wiping surface S at an inclination angle α. In FIG. 6, for the sake of explanation, the tip portion of the wiping portion 15 a is not elastically deformed, but actually, the tip portion of the wiping portion 15 a is wiped by the pressing force from the wiper arm 17. The wiping surface 15d is curved so as to follow S and has an appropriate tilt angle with respect to the wiping surface S, and the contact relationship of the wiping portion 15d with the wiping surface S is appropriate.

  In the case of the return path B, as shown in FIG. 7, a counterclockwise swinging force L acts on the blade rubber 15, and therefore, the counterbar 14 accommodated in the vertical bracing space 20 also swings counterclockwise. The power L will act. That is, in the vertebra bra insertion space 20, the return-side flange portion 23 b moves downward and the forward-side flange portion 23 a moves upward, so that the return-side flange portion 23 b is connected to the return-side flange portion 34. In the state of abutting and the outward-path side flange portion 23a being in contact with the upper nail wall portion 32 (in the illustrated example, the upper wall portion of the vertebra 14 is in contact with the upper nail wall portion 32), the return-side flange portion 23b. The swinging motion of the vertebra 14 around the contact portion between the wing surface wall 34 and the return side claw wall 34 is limited, and the inclination angle of the axis A of the blade rubber 15 with respect to the wiping surface S is an angle β (<α). It is said. For this reason, when the wiper blade 10 is moving along the return path B, the blade rubber 15 comes into contact with the wiping surface S at an inclination angle β. In FIG. 7, as in FIG. 6, the tip portion of the wiping portion 15 a is not elastically deformed for the sake of explanation, but actually, the wiping portion 15 a is pressed by the pressing force from the wiper arm 17. The tip portion of the wiping surface is curved so as to follow the wiping surface S so as to have an appropriate inclination angle with respect to the wiping surface S, and the contact relationship of the wiping point 15d with the wiping surface S is appropriate.

  Here, the inclination angle α of the blade rubber 15 in the forward path G is determined by the contact position of the forward path side flange portion 23a with the forward path side claw hook wall portion 33 and the contact between the return path side flange portion 23b and the claw upper wall portion 32. It can be set by the position and the thickness dimension of both flange portions 23a and 23b. In addition, the inclination angle β of the blade rubber 15 in the return path B is determined by the contact position of the return path flange portion 23b with the return path side claw hook wall portion 34 and the contact position of the forward path side flange portion 23a with the claw upper wall portion 32. And the thickness dimension of both flange portions 23a and 23b. For this reason, the difference in the inclination angle of the blade rubber 15 with respect to the wiping surface S in the forward path G and the backward path B is the height dimension of the forward path side claw side wall portion 30 and the backward path side claw side wall portion 31, that is, the cross-sectional shape along the width direction. It can be set by the left and right non-uniform shape of the vertebra bra insertion space 20 as seen in FIG.

  Therefore, according to the wiper blade 10 of the present invention, the inclination angle of the blade rubber 15 with respect to the wiping surface S is different between the scene of the forward path G and the scene of the return path B. Specifically, the inclination angle β in the return path B is set to be larger than the inclination angle α in the scene of the forward path G. For this reason, the wiping surface S can be wiped off satisfactorily. This will be described below.

  The wiper blade 10 provided in the vehicle C wipes the wiping surface S in order to improve, for example, the occupant's view from the passenger compartment to the outside (in the first embodiment, the front view through the windshield). Used as much as possible. In the role of improving the occupant's field of vision from the passenger compartment to the outside, securing the occupant's field of vision from the passenger compartment to the outside in the scene where the vehicle C is traveling is a safety issue. Most important.

  By the way, on the wiping surface S, as shown in FIG. 1, traveling wind W is generated according to the traveling of the vehicle C when viewed from the vehicle C due to the relative air flow accompanying the traveling of the vehicle C. In the case of Example 1, since the wiping surface S is comprised by the windshield of the vehicle C, the driving | running | working wind W will go to the back from the front of the vehicle C on the wiping surface S. For this reason, the wiper blade 10 moves on the wiping surface S while receiving the traveling wind W in the outward path G, and moves on the wiping surface S against the traveling wind W in the return path B. For this reason, the wiper blade 10 moves while receiving a pressing force to the wiping surface S by the traveling wind W in the forward path G, and the force (hereinafter referred to as wiping) for separating from the wiping surface S by the traveling wind W in the return path B. It will move while receiving lift from the surface S).

  Here, in the wiper blade 10, the blade rubber 15 has an inclination angle α (> β) (see FIG. 6) with respect to the wiping surface S in the forward path G, whereas the blade rubber 15 in the backward path B. Is an inclination angle β (<α) with respect to the wiping surface S (see FIG. 7). In the blade rubber 15, due to the pressing force from the wiper arm 17, the tip of the wiping portion 15 a is curved so as to follow the wiping surface S to have an appropriate tilt angle with respect to the wiping surface S. Although the contact relationship of 15d will be appropriate, if the inclination angle with respect to the wiping surface S is small in advance, an appropriate tilt angle with respect to the wiping surface S with a small amount of curvature at the tip of the wiping portion 15a Therefore, the contact relationship of the wiping portion 15d with the wiping surface S can be made appropriate with a small pressing force.

  In the wiper blade 10, even if the pressing force from the wiper arm 17 is constant during the reciprocating movement, the pressing force to the wiping surface S is added by the traveling wind W in the forward path G, whereas the traveling wind in the backward path B. The pressing force to the wiping surface S is reduced by the amount of lift from the wiping surface S due to W. However, in the wiper blade 10, the return path B has an inclination angle β (<α) smaller than that of the forward path G. Therefore, the difference in the pressing force applied to the wiping surface S transmitted from the frame member is reduced with respect to the wiping surface S. Since it can be offset by the difference in the inclination angle of the blade rubber 15, the contact relationship of the wiping portion 15 a of the blade rubber 15 that is slid to wipe the wiping surface S with respect to the wiping surface S of the wiping portion 15 d is the forward path G. The return path B can be the same. Thereby, the wiping performance at the time of driving | running | working of the vehicle C will be improved compared with the conventional wiper blade.

  In the forward path G, the blade rubber 15 has an inclination angle α (> β) with respect to the wiping surface S, whereas in the return path B, the blade rubber 15 has an inclination angle β (< α). For this reason, in the return path B that receives lift from the wiping surface S by the traveling wind W, the forward projected area as viewed in the movement direction of the wiper blade 10 is smaller than that in the forward path G. The pressing force on the surface S can be used, and the lift from the wiping surface S on the return path B can be reduced. For this reason, the wiper blade 10 can wipe the wiping surface S satisfactorily.

  Further, in the forward path G and the return path B, the tip of the wiping portion 15a of the blade rubber 15 is curved so as to follow the wiping surface S without affecting each other, and an appropriate tilt angle with respect to the wiping surface S is obtained. The inclination angle of the blade rubber 15 with respect to the wiping surface S can be set so that the contact relationship of the wiping location 15d with the surface S becomes appropriate. For this reason, the wiper blade 10 can wipe the wiping surface S satisfactorily.

  In the wiper blade 10, since the wiping portion 15d of the wiping portion 15a of the blade rubber 15 is in an appropriate contact relationship with the wiping surface S, the forward path G is switched to the backward path B or the backward path B to the forward path G. In this case, it is possible to suppress the reverse sound when the wiping portion 15a of the blade rubber 15 is reversed.

  In the wiper blade 10, since the wiping portion 15d of the wiping portion 15a of the blade rubber 15 is in an appropriate contact relationship with the wiping surface S, the wiper blade 10 can smoothly slide on the wiping surface S. Can be prevented.

  In each holding claw 19 of each yoke 13, an outward claw side wall portion 30 that extends downward on the forward side of each yoke 13 and a return side claw sidewall portion 31 that extends downward on the return side of each yoke 13. Since it can be realized by making the length dimension different, that is, by making the vertebra bra insertion space 20 non-uniform in shape when viewed in cross section, it can be manufactured easily and the blade for the wiping surface S can be easily The inclination angle of the rubber 15 can be set.

  In the vertebra bra insertion space 20, each holding claw 19 and the vertebra 14 are brought into contact each time the wiper blade 10 reciprocates. However, since the vertebra 14 is made of a resin material or a metal material, The strength against contact can be made appropriate while ensuring ease.

  Therefore, in the wiper blade 10 according to the first embodiment, the wiping surface S can be appropriately wiped regardless of the reciprocating movement direction.

  Next, the wiper blade 100 according to the second embodiment will be described. The wiper blade 100 is an example in which the configuration of each holding claw 190 of each yoke 13 is different from that of the first embodiment. Since the basic configuration of the wiper blade 100 is the same as that of the first embodiment, the same reference numerals as those in the first embodiment are given to the same functional portions, and the detailed description thereof is omitted.

  In the wiper blade 100, each holding claw (190a, 190b, 190c, 190d) of each yoke 13 forms a vertebra insert space (200) having a different shape depending on the arrangement position of the blade rubber 15 viewed in the longitudinal direction. . Since the blade rubber 15 is viewed symmetrically from the center portion to both ends as viewed in the longitudinal direction, only one will be described, and the other description will be omitted.

  Each holding claw (190) of each yoke 13 is referred to as a holding claw 190a, a holding claw 190b, a holding claw 190c, and a holding claw 190d in order from the central portion when viewed in the longitudinal direction of the blade rubber 15. In the second embodiment, the holding claw 190a and the holding claw 190b are configured to be equal.

  As shown in FIG. 9, the holding claw 190 a (the holding claw 190 b is also the same) as viewed in the height direction orthogonal to the wiping surface S is connected to the return side claw flange wall part 340 a of the return side flange part 23 b. The distance H1 is from the contact position to the contact position of the forward path flange portion 23a with the claw upper wall portion 320a.

  As shown in FIG. 10, the holding claw 190c is set such that the height dimension of the forward claw side wall portion 300c is smaller than the height dimension of the forward claw side wall portion 300a of the holding claw 190a. Therefore, when viewed in the height direction, the holding claw is from the contact position of the return-side flange portion 23b to the return-side claw collar wall portion 340c to the contact position of the forward-side flange portion 23a to the claw upper wall portion 320c. The interval H2 is smaller than the interval H1 at 190a.

  As shown in FIG. 11, in the holding claw 190d, the height dimension of the forward claw side wall portion 300d is set to be smaller than the height dimension of the forward claw side wall portion 300d of the holding claw 190d. Therefore, when viewed in the height direction, the holding claw is from the contact position of the return-side flange portion 23b to the return-side claw collar wall portion 340d to the contact position of the outward-path side flange portion 23a to the claw upper wall portion 320d. The interval H3 is smaller than the interval H2 at 190c.

  In the wiper blade 100, in the same way as in the first embodiment, the blade rubber 15 is swung by the holding claws 190a, 190b, 190c, and 190d of each yoke 13 along the reciprocating movement of the wiper arm 17 in the return path. By limiting, the inclination angle of the blade rubber 15 with respect to the wiping surface S is determined, but the vertical bra insertion spaces 200a, 200c, and 200d (holding claws) formed by the respective holding claws 190a, 190b, 190c, and 190d. The vertical angle of the blade rubber 15 with respect to the wiping surface S is gradually changed when viewed in the longitudinal direction because the vertebra bra insertion space 190b is not shown in the figure. Specifically, the blade rubber 15 (axis A) has an inclination angle γ (see FIG. 9) with respect to the wiping surface S at the portion held by the holding claws 190a and 190b. The inclination angle with respect to the wiping surface S is the angle δ (<γ) (see FIG. 10) at the location held by the claw 190c, and the inclination angle with respect to the wiping surface S is at the location held by the holding claw 190d. The angle is ε (<δ) (see FIG. 11).

  As an example of Example 2, when the holding claw 190a and the holding claw 190b have a dimension of H1 = 3.5 (mm), the inclination angle γ = 76 (°) (inclination angle with the line perpendicular to the wiping surface S = 14 (°)) and the holding claw 190c has a dimension of H2 = 3.0 (mm), the inclination angle δ = 78 (°) (inclination angle with the line perpendicular to the wiping surface S = 12 (°) When the holding claw 190d has a dimension of H1 = 2.6 (mm), an inclination angle ε = 81 (°) (inclination angle with a line perpendicular to the wiping surface S = 9 (°)) is obtained. It was.

  As described above, in the wiper blade 100, when viewed in the longitudinal direction, the inclination angle of the blade rubber 15 with respect to the wiping surface S is made smaller from the central portion toward each end, so that the tip of the wiping portion 15a of the blade rubber 15 is reduced. The contact relationship of the wiping portion 15d with the wiping surface S when the portion is curved so as to follow the wiping surface S can be made more appropriate. This is due to the following.

  When the wiping surface S is not configured to be curved with a uniform curvature, if the inclination angle of the blade rubber with respect to the wiping surface S is made constant in the longitudinal direction, the change in the curvature of the wiping surface S is caused. The inclination angle of the blade rubber with respect to the wiping surface S will change. For this reason, like the wiper blade 100, the wiping surface regardless of the wiping position of the wiping surface S with respect to the wiping surface S in which the curvature is changed by appropriately changing the inclination angle of the blade rubber when viewed in the longitudinal direction. This is because the inclination angle with S can be made appropriate.

  Further, the wiper blade 100 receives a pressing force to the wiping surface S from the wiper arm 17 (see FIG. 1) coupled in the vicinity of the central portion viewed in the longitudinal direction. As the distance from the connecting portion increases, the pressing force applied to the wiping surface S applied to the blade rubber 15 is reduced. For this reason, in the wiper blade 100, since the inclination angle with respect to the wiping surface S of the blade rubber 15 can be reduced as the distance from the coupling point with the wiper arm 17 becomes larger, the reduction in pressing force can be offset. Regardless of the position of the blade rubber 15 as viewed in the scale direction, the contact relationship of the wiping portion 15a of the blade rubber 15 that is slid to wipe the wiping surface S with the wiping surface S of the wiping portion 15d is constant. It depends on what you can do.

  Therefore, in the wiper blade 100, the wiping performance during traveling of the vehicle C is improved as compared with the conventional wiper blade, and the wiping surface S is wiped well with no difference in the long direction. Can do.

  In the second embodiment, only the inclination angle of the blade rubber 15 with respect to the wiping surface S in the return path B is changed. However, it goes without saying that the forward path G may be set similarly. However, the present invention is not limited to the second embodiment.

  Further, in Example 2, each end has a configuration in which the inclination angle of the blade rubber 15 with respect to the wiping surface S is made smaller than the vicinity of the center portion viewed in the longitudinal direction. Regardless of the position of the blade rubber, if the holding posture of the blade rubber by each holding claw is changed so that the contact relation of the wiping portion of the wiping portion of the blade rubber to the wiping surface is constant, the wiping surface The curvature, the material of the blade rubber (curvature), the pressing force applied to the blade rubber, and the like can be set as appropriate, and are not limited to the second embodiment described above.

  In each of the above-described embodiments, the wiper blade has a tournament type structure, but the blade rubber is held by the frame member so that the inclination angle of the blade rubber with respect to the wiping surface differs between the forward path and the return path. As long as it is, it is not limited to the above-described embodiments.

  Moreover, in each above-mentioned Example, although the wiping surface S was comprised by the windshield of the vehicle C, a rear glass may be sufficient and it is not limited to each above-mentioned Example.

  Furthermore, as shown by a two-dot chain line in FIG. 2, the present invention can be applied to a wiper blade provided with a snowproof cover member 25. The snow cover member 25 prevents the snow from entering and adhering to the frame member (in each embodiment, the primary lever 11, the two secondary levers 12 and the four yokes 13) and the gap between the frame member and the blade rubber. Accordingly, the frame member and the gap between the frame member and the blade rubber are covered. In the case of the wiper blade provided with the snow cover member 25 as described above, the wiping performance can be improved more effectively by providing a difference in the inclination angle of the blade rubber with respect to the wiping surface between the forward path and the backward path. . This is because, in a wiper blade not provided with the snowproof cover member 25, wind can pass through the gap between the frame member itself and the gap between the frame member and the blade rubber when reciprocating. However, if the snow cover member 25 is provided, the wind cannot pass therethrough.

  In each of the above-described embodiments, the flange portion 23 of the vertebra 14 attached to the head 15b of the blade rubber 15 is configured to be held in the vertebra bra insertion space 20 formed by each holding claw 19, but the forward path and the return path As long as the blade rubber is held by the frame member so that the inclination angle of the blade rubber with respect to the wiping surface is different, the invention is not limited to the above-described embodiments.

1 is a schematic perspective view showing a vehicle to which a wiper blade according to the present invention is applied. 1 is a schematic perspective view showing a wiper blade according to Embodiment 1. FIG. 1 is a developed perspective view showing a wiper blade according to Embodiment 1. FIG. It is sectional drawing obtained along the II line | wire which shows the vertebra and blade rubber and is shown in FIG. FIG. 3 shows a holding claw and is a cross-sectional view obtained along the line II shown in FIG. 2. It is drawing for demonstrating the blade rubber operation | movement in an outward path, and is sectional drawing obtained along the II line | wire shown in FIG. It is drawing for demonstrating the blade rubber operation | movement in a return path, and is sectional drawing obtained along the II line | wire shown in FIG. 1 is a schematic perspective view showing a wiper blade according to Embodiment 1. FIG. It is sectional drawing obtained along the II-II line | wire shown in FIG. It is sectional drawing obtained along the III-III line | wire shown in FIG. It is sectional drawing obtained along the IV-IV line | wire shown in FIG.

Explanation of symbols

10, 100 Wiper blade 11 (part of the frame member) primary lever 12 (part of the frame member) secondary lever 13 (part of the frame member) yoke 14 (as cover member) Vertibra 15 blade Rubber 15a Wiping portion 15b Head 19 and 190 Holding claw 21 (as holding means) Blade rubber insertion space 23a Outward side flange portion 23b Return side flange portion 25 Snowproof cover members 32 and 320 (as upper locking wall) Wall portions 33, 330 Outward side hook wall portions 34, 340 (as forward path lower side locking walls) Return side side hook wall portions C (as forward path lower side locking walls) C Vehicle S Wiping surface W Traveling wind G Outward path B Return

Claims (8)

A blade rubber having a long shape for wiping a wiping surface of a vehicle, and having a wiping portion provided at a lower portion and a head portion provided at an upper portion so as to slide the wiping surface when viewed in a cross section perpendicular to the longitudinal direction A frame member extending along the longitudinal direction of the blade rubber, and a frame member provided at a distance from each other along the longitudinal direction of the frame member to hold the head of the blade rubber A plurality of holding means, and a wiper blade reciprocally moved on the wiping surface in a direction intersecting a longitudinal direction of the blade rubber,
The holding means holds the head portion of the blade rubber so that the inclination angle of the blade rubber with respect to the wiping surface differs between the forward path and the return path when viewed in the width direction orthogonal to the longitudinal direction of the blade rubber. A wiper blade characterized by One of the outbound path or the inbound path includes a direction against running wind generated on the wiping surface as the vehicle travels,
The holding means includes the blade with respect to the wiping surface as viewed in the width direction perpendicular to the longitudinal direction of one of the forward paths and the backward path including the direction against running wind. 2. The wiper blade according to claim 1, wherein a rubber inclination angle is set large.   The holding means is based on a posture in which the blade rubber can swing along a plane that includes the reciprocating direction and is orthogonal to the wiping surface, and the vertical direction of the blade rubber coincides with the direction orthogonal to the wiping surface. The head of the blade rubber is held so that a swing allowable range from the reference posture to the forward path side and a swing allowable range from the reference posture to the forward path side are different as postures. The wiper blade according to claim 1 or 2. The head portion of the blade rubber is provided with a pair of flange portions extending in the reciprocating direction,
The holding means, when the blade rubber is moving in the forward path, the forward path lower side locking wall that comes into contact with the forward path flange part to limit the downward movement of the forward path flange part,
When the blade rubber is moving along the return path, a return-side lower side locking wall that comes into contact with the return-side flange part to restrict the return-side flange part from moving downward;
When the forward path lower side locking wall is locking the forward path side flange part and when the return path lower side locking wall is locking the return path side flange part, the locking part is pivoted on the swing shaft. An upper locking wall that comes into contact with the head to restrict the head from moving upward as
The distance from the upper locking wall to the forward path lower side locking wall and the distance from the upper locking wall to the return path lower side locking wall are different from each other. Wiper blade.   The pair of flange portions each have a blade rubber insertion space extending in the longitudinal direction of the blade rubber, and a cover member made of a long tube made of resin or metal that can hold the head in the blade rubber insertion space. The wiper blade according to claim 4, wherein the wiper blade is provided integrally with the wiper blade.   In the holding means, at least a part of the frame member has an inclination angle of the blade rubber with respect to the wiping surface when the installation position on the frame member viewed in the longitudinal direction is closer to both ends with respect to the center portion. The wiper blade according to any one of claims 1 to 5, wherein the wiper blade is set small.   The holding means is set so that an inclination angle of the blade rubber with respect to the wiping surface is different depending on an installation position on the frame member as viewed in the longitudinal direction in at least a part of the frame member. The wiper blade according to any one of claims 1 to 5. The wiper blade according to any one of claims 1 to 7, wherein the frame member is provided with a snowproof cover member.

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