JP2008296808A - Wiper blade - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wiper blade for preventing the exposure of a mounting means to the outer surface while securing good wiping performance. <P>SOLUTION: The wiper blade 10 comprises a blade rubber 11 for wiping a wiped face S of a vehicle C, a leaf member 12 mounted on a head portion 11b to face-abut on an upper face 11f of the head portion 11b, the mounting means 15 mounted at the approximate center thereof so as to be connected to a wiper arm 20, and a cover member 14 formed of an elastically deformable member and mounted to cover the leaf member 12. The cover member 14 has a storage groove portion 21 for storing the leaf member 12 together with the mounting means 15 holding it, and a mounting opening portion 22 having an upper face 14b opened and communicated with the center of the storage groove portion 21 to connect the mounting means 15 to the wiper arm 20. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a wiper blade that is attached to the tip of a wiper arm of a vehicle and used to wipe a wiping surface such as a windshield.

  Conventionally, in order 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 blade, an elongated spring elastic vertical strip curved in the shape of a bow is embedded in an elongated blade rubber that wipes the wiping surface, and the blade rubber is curved, and the intermediate position of this blade rubber It is known that it is connected to a wiper arm provided on a vehicle via an attaching means provided on the vehicle (see, for example, Patent Document 1).

  In the wiper blade configured as described above, the pressing force received from the wiper arm is dispersed by the vertical strip embedded in the blade rubber and equalized in the longitudinal direction of the vertical strip, and the blade rubber (wiping unit) ) Is brought into contact with the wiping surface with a substantially uniform pressing force over its entire length, and the blade rubber slides on the wiping surface as the wiper arm rotates, so that the wiping surface is wiped well. Can do.

  By the way, in general, in a wiper blade, since a predetermined rigidity is required for an attachment means to be attached to a wiper arm, for example, the attachment means is formed from a relatively hard material such as a metal member or a hard resin material. Has been.

However, in the wiper blade of Patent Document 1 described above, the attachment means is exposed on the outer surface, and it is possible for a vehicle user or the like to directly contact with the wiper blade. However, an unexpected situation due to the contact is avoided. From the viewpoint, it is desirable that the attachment means is not exposed on the outer surface. For this reason, a wiper blade in which the attaching means is covered with a cover member made of a resilient material is considered (for example, see Patent Document 2).
Special Table 2002-53325 JP 2006-76505 A

  However, in the wiper blades of Patent Document 1 and Patent Document 2 described above, the attachment means connected to the wiper arm holds the blade rubber formed of an elastic material that can slide without damaging the wiping surface. For this reason, it is impossible to efficiently act on the vertical strip material that is embedded in the blade rubber and disperses the pressing force from the wiper arm, and the wiping performance may be reduced.

  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 preventing the attachment means from being exposed to the outer surface while ensuring good wiping performance.

  In order to solve the above-described problems, the wiper blade of the present invention has a long shape, and when viewed in a cross section orthogonal to the long direction, the upper part has a wiping portion on the lower side and the wiping surface of the vehicle is wiped. The blade rubber has a long shape that fits the head portion of the blade rubber, and is curved in a concave shape and in the long direction when viewed from the blade rubber side so as to be in surface contact with the upper surface of the head portion. The attached spring plate member, an attachment means that holds the spring plate member at a substantially central portion of the spring plate member and can be connected to a wiper arm provided in the vehicle, and a member that can be elastically deformed. A cover member attached to the spring plate member so as to cover the spring plate member and having a long shape that fits the spring plate member, and the blade rubber on the wiping surface by the swing of the wiper arm A wiper blade reciprocally moved in a direction intersecting the longitudinal direction of the spring plate member, wherein the cover member has a lower surface facing the wiping surface opened along the longitudinal direction and the spring plate A housing groove portion capable of housing the member and the attachment means holding the spring plate member together, and opening the upper surface of the cover member so as to enable connection between the attachment means and the wiper arm. A mounting opening that communicates with the central portion is provided.

  The wiper blade according to claim 2 is the wiper blade according to claim 1, wherein one of the reciprocating directions is in a direction against running wind generated on the wiping surface as the vehicle travels. The cover member is a predetermined region centered on a central position viewed in the longitudinal direction, and includes one direction including the direction against the traveling wind in the reciprocating direction. A rectifying plate portion extending in parallel with the wiping surface toward the traveling direction is provided on a side surface facing the traveling direction side.

  The wiper blade according to claim 3 is the wiper blade according to claim 2, wherein the rectifying plate portion forms an inclined surface that makes an elevation angle with respect to the wiping surface as viewed from the front side in the traveling direction. It is characterized by.

  The wiper blade according to claim 4 is the wiper blade according to claim 3, wherein the predetermined region in which the rectifying plate portion is provided is the attachment means when viewed in the longitudinal direction of the cover member. Is set based on a region where the front projection area as viewed from the front side in the traveling direction is increased.

  In the wiper blade of the present invention, since the spring plate member and the attachment means for holding the spring plate member are accommodated in the cover member, the attachment means can be prevented from being exposed to the outer surface, and the spring plate member can be Exposure to the surface can be prevented. This spring plate member disperses the pressing force from the wiper arm and equalizes it in the longitudinal direction, and makes the blade rubber contact the wiping surface with a substantially uniform pressing force over its entire length. Since it is formed from a relatively hard material such as a metal member or a hard resin material, it is exposed to the outer surface from the viewpoint of avoiding unexpected situations caused by direct contact with vehicle users, etc. It is desirable not to. Here, since the blade rubber covering the attachment means and the spring plate member is formed from a member that can be elastically deformed, the outer surface of the wiper blade is formed from a relatively soft member that can be elastically deformed. Since it is constituted by the blade rubber and the cover member, even if a user of the vehicle contacts the wiper blade, an unexpected situation due to the contact can be avoided.

  Further, since the attachment means connected to the wiper arm is configured to hold the spring plate member attached to the head so as to be in surface contact with the upper surface of the blade rubber head, the wiper arm is attached via the attachment means. The applied pressing force toward the wiping surface can be efficiently applied to the spring plate member. For this reason, the blade rubber (wiping part) is brought into contact with the wiping surface with a substantially uniform pressing force over the entire length of the blade rubber by the pressing force from the wiper arm via the spring plate member and the attaching means for holding the spring plate member. And good wiping performance can be obtained.

  In addition to the above-described configuration, the cover member is a predetermined region centered on the central position viewed in the longitudinal direction, and the traveling direction in one of the paths including the direction against the traveling wind in the reciprocating direction When the rectifying plate portion extending in parallel with the wiping surface in the traveling direction is provided on the side surface facing the side, the relative portion generated in accordance with the traveling of the vehicle near the central portion of the blade rubber provided with the rectifying plate portion is provided. Since it is possible to obtain a pressing force from the traveling wind generated on the wiping surface of the vehicle by the air flow toward the wiping surface, the wiping surface can be wiped more appropriately. This is because the spring plate member, which is concave when viewed from the blade rubber side and is curved in the longitudinal direction, has a spring characteristic that the center part tends to lift up with respect to the wiping surface, so that the wiping part is pressed against the wiping surface. This is because there is a bias in which the vicinity of the center portion becomes weakest when viewed in the longitudinal direction of the blade rubber, and the wiping performance in the vicinity of the center portion may be reduced.

  The following can also be considered. In the wiper blade, for example, when the wiping surface is made of a windshield, a traveling wind from the front to the rear of the vehicle is generated on the wiping surface. Is moved back and forth by swinging about the axis provided at the lower end portion, so that it moves while receiving a pressing force from the traveling wind in the forward path, and against the traveling wind in the backward path. Will move. When the wiper blade moves against the traveling wind along the wiping surface, the wiper blade receives a force peeled from the wiping surface, that is, a force lifting from the wiping surface (lifting force from the wiping surface).

  Here, the wiper blade is designed so as to reduce the front projection area seen from the traveling direction side in order to reduce the lift received from the traveling wind, but there is an attachment means in the vicinity of the center portion seen in the longitudinal direction. Therefore, in the vicinity of the central portion, the front projection area increases in the vicinity of the central portion as compared with the vicinity of both ends seen in the longitudinal direction, and is most susceptible to the lift force based on the traveling wind. It has become. For this reason, in the wiper blade, when moving against the traveling wind, lift acts, and the force with which the wiping portion is pressed against the wiping surface is near the center when viewed in the longitudinal direction of the blade rubber. There is a risk that the weakening bias occurs and the wiping performance in the vicinity of the central portion is reduced.

  For this reason, if the rectifying plate provided near the center of the blade rubber obtains a pressing force from the running wind toward the wiping surface, the influence of lift based on the running wind near the center of the blade rubber can be counteracted. Since the bias seen in the longitudinal direction of the blade rubber of the force with which the wiping portion is pressed against the wiping surface can be eliminated, the wiping surface can be wiped more appropriately.

  In addition to the above configuration, when the rectifying plate portion is configured to form an inclined surface that makes an elevation angle with respect to the wiping surface as viewed from the front side in the traveling direction, the rectifying plate portion applies a pressing force directed from the traveling wind toward the wiping surface. It can be obtained efficiently.

  In addition to the above-described configuration, the front projection area as viewed from the front side in the traveling direction is increased by viewing the predetermined region in which the current plate portion is provided in the longitudinal direction of the cover member and accommodating the attachment means. If the setting is based on the area, it is possible to obtain a pressing force from the traveling wind toward the wiping surface in accordance with the magnitude of the influence of the lifting force based on the traveling wind that can be received. The influence can be canceled and the wiping surface can be wiped more appropriately.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is a perspective view for explaining a state in which a wiper blade 10 according to the present invention is attached to a distal end portion 20a of a wiper arm 20 of a vehicle C and wipes a windshield as a wiping surface S. FIG. FIG. 3 is a schematic perspective view showing the wiper blade 10, FIG. 3 is an exploded perspective view for showing the configuration of the wiper blade 10, and FIG. 4 is obtained along the line II shown in FIG. FIG. FIG. 5 is an exploded perspective view for showing the configuration of the attachment means 15 of the wiper blade 10, and FIG. 6 is a cross-sectional view taken along the line II-II shown in FIG. FIG. 6 shows a state where the wiper arm 20 is not coupled for easy understanding.

  First, the overall structure of the wiper provided with the wiper blade 10 of this embodiment will be described. As shown in FIG. 1, a wiper arm 20 to which the wiper blade 10 is attached is connected to a wiper motor via a wiper link, although not shown. The wiper motor can be driven to reciprocate along the wiping surface S (see arrows G and B).

  When the wiper arm 20 is swung, the wiper blade 10 attached to the wiper arm 20 is moved from below the wiping surface S in a stationary posture so that the direction intersecting the longitudinal direction becomes the traveling direction. A reciprocating movement comprising an outward path G slid along the vehicle C along the upper and rear sides S and a return path B slid along the wiping surface S from the end of the outward path G to the lower front of the vehicle C. The wiping surface S is wiped off repeatedly.

  On the other hand, on the wiping surface S, traveling wind W toward the vehicle C is generated when viewed from the vehicle C side due to the relative flow of air accompanying the traveling of the vehicle C. In this embodiment, since the wiping surface S is constituted by the windshield of the vehicle C, the traveling wind W is directed from the front of the vehicle C to the rear 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. In other words, the wiper blade 10 moves while receiving the pressing force to the wiping surface S by the traveling wind W in the forward path G, and the force (from the wiping surface) to peel from the wiping surface S by the traveling wind W in the return path B. It will move while receiving the lift.

  2 and 3, the wiper blade 10 is a blade rubber 11 for wiping the wiping surface S, and a spring plate member for bringing the blade rubber 11 into contact with the wiping surface S with a uniform pressing force. Vertebra 12, the upper part of blade rubber 11 and cover member 14 that accommodates vertebra 12, and attachment means 15 for attaching them to tip 20 a of wiper arm 20.

  The blade rubber 11 is formed in an elongated shape with an elastic rubber material that can slide without damaging the wiping surface S. As shown in FIG. 4, the blade rubber 11 includes a wiping portion 11a having a tongue-like cross-sectional view whose tip is in contact with the wiping surface S, a wide head portion 11b positioned above the wiping portion 11a, and a wiping portion 11a. A neck portion 11c having a narrower width than the head portion 11b connecting the head portion 11b and arms 11d and 11d projecting in the long orthogonal direction from both sides of the neck portion 11c.

  Since the width of the neck portion 11c is narrower than that of the upper portion of the wiping portion 11a and the head portion 11b, a recess is formed between the wiping portion 11a and the head portion 11b. Further, the arm portions 11d and 11d have roots connected to the neck portion 11c, and the tips thereof are projected obliquely upward therefrom.

  On the other hand, the blade rubber 11 is a so-called neck reversal structure capable of bending near the neck portion 11c when reciprocating motion is reversed. That is, when the blade rubber 11 is reversed while receiving the urging force and pressed against the wiping surface S, in other words, when the sliding direction is switched to the opposite side (when the forward path G and the return path B are turned back). ), The neck portion 11c is curved and the wiping portion 11a has an appropriate tilt angle with respect to the wiping surface S (see FIGS. 7 and 9), and the contact relationship of the wiping location 11e with the wiping surface S is appropriate. It is formed to become. At this time, the one arm portion 11d is pressed against and supported by the lower surface 14a of the cover member 14, thereby suppressing excessive bending of the neck portion 11c and maintaining the tilt angle of the wiping portion 11a in an appropriate state. (See FIGS. 7 and 9). A vertical bra 12 is attached to the blade rubber 11.

  As shown in FIG. 3, the vertebra 12 is formed in a long plate shape from a synthetic resin material or a metal material having elasticity, and has a shape curved like a bow in the long direction. In other words, the vertebra 12 has a function to disperse this force and equalize it when viewed in the longitudinal direction of the vertebra 12 when the central portion 12a of the vertebra 12 curved in a bow shape is pushed down to be flattened. . The vertical bar 12 is provided with a plurality of holders 13, 13,... (6 in this embodiment) for attaching the blade rubber 11 to the vertical bar 12.

  As shown in FIGS. 3 and 4, the holder 13 is processed so that both sides of the rectangular plate are folded back and folded into an L shape in two stages, and is formed in an inverted convex shape when viewed in cross section. In addition, a notch 13a is formed on the lower surface. In the space above the holder 13, the vertebra 12 is inserted from the direction perpendicular to the plane of FIG. Further, the head 11b is inserted into the space below the holder 13 so that the neck 11c of the blade rubber 11 passes through the notch 13a from the direction orthogonal to the plane of FIG. Accordingly, the blade rubber 11 can be supported by the holder 13 attached to the vertebra 12 so that the wiping portion 11a protrudes downward from the notch 13a. Thus, the upper surface 11 f of the head portion 11 c of the blade rubber 11 is brought into surface contact with the lower surface of the vertebra 12, and the vertebra 12 is attached to the head portion 11 c of the blade rubber 11.

  On the other hand, the attachment means 15 to the wiper arm 20 is attached to the central part 12 a of the vertebra 12. As shown in FIGS. 5 and 6, the attachment means 15 mainly includes a clip base 17 for sandwiching the vertebra 12 from both sides and a clip 18 attached thereto.

  The clip base 17 has a pair of opposed wall portions 17a and 17a opposed to each other at both side edges of the central portion 12a of the vertebra 12 with the vertebra 12 interposed therebetween, and the interval between the pair of opposed wall portions 17a and 17a is riveted. It is possible to attach to the vertebra 12 by fixing with 16. A clip 18 is attached to the rivet 16 so as to be rotatable about the rivet 16.

  The clip 18 is made of a synthetic resin material, and can fix and release the tip 20a of the wiper arm 20 provided in the vehicle C. The clip 18 has a box-like shape as a whole and has a curved main body portion 18a in which one end side in the longitudinal direction projects in a semicircular shape, guide wall portions 18b located on both sides thereof, and attachment to the rivet 16. And a plate-shaped lever portion 18d extending at the lower portion of the clip main body portion 18a.

  The clip main body portion 18a is a portion where the tip end portion 20a of the wiper arm 20 is coupled. The guide wall portion 18b slides on the opposing wall portions 17a and 17a when attached to the clip base 17, and the wiper arm 20 attached to the clip main body portion 18a is arranged in the width direction of the blade rubber 11 (parallel to the wiping surface S). Displacement in the direction perpendicular to the longitudinal direction) is prevented. The holding notch 18c extends along the width direction of the blade rubber 11 (the direction parallel to the wiping surface S and perpendicular to the longitudinal direction) from one guide wall portion 18b through the clip body portion 18a to the other guide wall portion 18b. The rivet 16 is fitted and can be rotatably held. The lever portion 18d can be bent upward (see the two-dot chain line lever portion 18d in (b)), and a locking claw 18e is provided on the lower surface facing the vertebra 12.

  The attachment means 15 is attached to the vertebra 12 as follows. First, both edge portions of the central portion 12a of the vertebra 12 are sandwiched between the opposing wall portions 17a and 17a of the clip base 17, and the opposing wall portions 17a and 17a are fixed by the rivets 16 (see arrow A1). The base 17 is attached to the vertical bra 12. Next, the clip 18 is attached to the rivet 16 so that the rivet 16 is held by the holding notch 18c (see arrow A2). As a result, the attachment means 15 in which the clip 18 is rotatable with respect to the clip base 17 is attached to the vertical bra 12. Here, in the attachment means 15, both end portions of the opposing wall portions 17 a, 17 a of the clip base 17 viewed in the longitudinal direction are brought into contact with the two holders 13 adjacent to the clip base 17, so The relative displacement from 12 is prevented. The wiper blade 10 is coupled to the distal end portion 20 a of the wiper arm 20 through the attachment means 15.

  The distal end portion 20a of the wiper arm 20 has a hook shape in which a plate-like member is curved, and a locking hole 20b that can be engaged with the locking claw 18e of the lever portion 18d is provided in the vicinity of the distal end. The wiper arm 20 has a distal end portion 20a that is placed around the clip main body portion 18a so as to surround the clip main body portion 18a, and an engagement claw 18e of the lever portion 18d of the clip 18 is engaged with the engagement hole 20b of the distal end portion 20a. By doing so, it is coupled to the clip 18 and coupled to the attachment means 15 (see arrow A3).

  In this way, the vertebra 12 to which the attachment means 15 and the blade rubber 11 are attached is accommodated in the cover member 14. As shown in FIGS. 2 and 3, the cover member 14 is formed into an elongated shape slightly longer than the vertebra 12 by an elastic material such as rubber or synthetic resin material, and the vertebra 12 and the blade rubber 11 are entirely formed. The size of the head 11b can be accommodated. Further, the cover member 14 is sized so that the central portion 14C viewed in the longitudinal direction can accommodate the attachment means 15, and a smooth curved surface is drawn from both side portions 14S and 14S continuous to the central portion 14C. It has a shape that rises.

  An inclined surface portion 14 c and a rib portion 14 d are formed on the upper surface 14 b of the cover member 14. As shown in FIG. 4, the inclined surface portion 14 c has a constant gradient from one side end (front side in the traveling direction in the return path B) to the other side end of the upper surface 14 b of the cover member 14 when viewed in a cross section orthogonal to the longitudinal direction. The rib portion 14d protrudes upward so that the other end of the upper surface 14b is the highest.

  Further, the cover member 14 has a housing groove 21 that opens a lower surface 14a extending along the longitudinal direction along the extending direction (longitudinal direction), and a mounting opening that opens the upper surface 14b at the central portion 14C. The part 22 (refer FIG. 3 and FIG. 6) and the baffle plate part 23 extended from the side surface 14e in 14 C of center parts are provided.

  The housing groove 21 communicates with the lower open portion 21a that is continuous with the opening on the lower surface and is slightly wider than the lower portion of the holder 13 that houses the head portion 11b of the blade rubber 11, and the lower open portion 21a at the upper portion thereof. And a fitting groove portion 21b having a width wider than that. The fitting groove portion 21 b has a substantially rectangular shape with a cross-sectional width that can sandwich both side edges of the vertebra 12, and extends along the longitudinal direction of the cover member 14. As shown in FIG. 6, the center portion of the fitting groove portion 21 b viewed in the longitudinal direction has a size that can accommodate the attachment means 15. A mounting opening 22 is provided so as to communicate with the fitting groove portion 21 b, that is, the accommodation groove portion 21.

  The attachment opening portion 22 communicates with the central portion of the fitting groove portion 21b while opening the upper surface 14b of the central portion 14C of the cover member 14. The mounting opening 22 has a minimum size that does not hinder the connection between the wiper arm 20 and the mounting means 15. In this embodiment, both opposing wall portions of the clip base 17 of the mounting means 15 are provided. The size is such that the upper ends of 17a and 17a and the upper ends of both guide wall portions 18b of the clip 18 are not exposed. In the present embodiment, a shielding piece 24 is provided in the attachment opening 22. As shown in FIGS. 2 and 3, the shielding piece 24 is viewed from a side edge located on one end side projecting in a semicircular shape in the clip main body portion 18 a of the clip 18 when the mounting opening 22 is viewed in the longitudinal direction. , And extends so as to shield substantially half of the mounting opening 22. The shielding piece 24 shields the attachment means 15 and the wiper arm 20 in a connected state without obstructing the connection between the clip 18 and the wiper arm 20 that are rotatable around the rivet 16 (see FIG. 2). ). A rectifying plate portion 23 is provided in the central portion 14C where the mounting opening 22 is provided.

  As shown in FIG. 6, the rectifying plate portion 23 is a wiping surface in the central portion 14 </ b> C of the cover member 14 from the side surface 14 e located on one side end side (front side in the traveling direction in the return path B) toward the traveling direction. A rectifying plate inclined surface 23a (an inclined surface having an elevation angle with respect to the wiping surface S) extending in parallel with S and rising at a constant gradient toward the side surface 14e when viewed from the front in the traveling direction in the return path B is formed. . In the present embodiment, the rectifying plate portion 23 has an extending end 23b smoothly extending from both side portions 14S and 14S of the cover member 14 when viewed in the longitudinal direction of the cover member 14 in the present embodiment. It is made into the continuous smooth curve so that it may become the largest extension dimension in 14C. In the present embodiment, the rectifying plate portion 23 extends from the side surface 14 e so that the lower surface thereof is flush with the lower surface 14 a of the cover member 14. A region Ac (refer to FIG. 2 (between B and B ′) where the rectifying plate portion 23 is provided corresponds to the central portion 14C of the cover member 14 that is raised to accommodate the attachment means 15. In other words, it is set so as to correspond to a front projection area viewed from the front side in the traveling direction on the return path B or a region where the air resistance increases on the return path B by rising.

  The wiper blade 10 is assembled by housing the vertebra 12 to which the blade rubber 11 is attached via the six holders 13 and having the attachment means 15 mounted in the accommodation groove 21 of the cover member 14. The attachment means 15 is accommodated in the cover member 14. The wiper blade 10 is mounted on the vehicle C by connecting the wiper arm 20 to the clip 18 of the attachment means 15 via the attachment opening 22 (see FIGS. 1 and 2). Then, the wiper surface 20 is wiped by swinging the wiper arm 20.

  Next, the operation of the wiper blade 10 of this embodiment will be described. As described above, the wiper blade 10 travels against the traveling wind W on the return path B, and moves while receiving a force (lifting force from the wiping surface S) to be separated from the wiping surface S by the traveling wind W. Become. In this return path B, since the wiper blade 10 is provided with the rectifying plate portion 23 on the side surface 14e of the central portion 14C of the cover member 14, it is received by the central portion 14C of the cover member 14 as shown in FIG. The air flow is applied to the rectifying plate inclined surface 23a while being smoothly applied to the rectifying plate inclined surface 23a of the rectifying plate portion 23, thereby generating a force for pressing the central portion 14C of the wiper blade 10 to the wiping surface S side. (Refer to the characteristic line shown by the dashed line in FIG. 8). For this reason, the wiper blade 10 can wipe the wiping surface S appropriately. This is due to the following. Here, in the scene where the wiper blade 10 is traveling in the return path B, the distribution of the force with which the wiping portion 11a viewed in the longitudinal direction presses the wiping surface S is schematically shown in FIG. In FIG. 8, the vertical axis indicates the magnitude of the pressing force, and the horizontal axis indicates the position of the wiper blade 10 in the longitudinal direction. The horizontal axis symbols E, B, B ′, and E ′ indicate those in FIG. Corresponding to the positions indicated by the symbols E, B, B ′ and E ′.

  In the wiper blade 10, the vertebra 12 is curved in a bow shape with respect to the longitudinal direction, that is, is concave and curved in the longitudinal direction when viewed from the blade rubber 11 side. When the blade rubber 11 (wiping portion 11a) is pressed against the wiping surface S by being pressed from 20, the central portion 12a has a spring characteristic that is easy to lift with respect to the wiping surface S. Further, in the wiper blade 10, the central portion 14 </ b> C of the cover member 14 is configured to rise to accommodate the attachment means 15 when viewed in the longitudinal direction, so that the vicinity of the central portion is influenced by the lift based on the traveling wind W. Is the most susceptible. For these reasons, in the wiper blade 10, in the return path B, the force with which the wiping portion 11a is pressed against the wiping surface S is biased to become weakest in the vicinity of the central portion viewed in the long direction (in the two-dot chain line). (See the characteristic line shown). However, in the wiper blade 10, in the vicinity of the center portion, as described above, the rectifying plate portion 23 receives the air flow when traveling in the return path B, and presses the wiper blade 10 against the wiping surface S side. (Refer to the characteristic line indicated by the alternate long and short dash line), the influence of the lift force from the wiping surface S is canceled, that is, the vicinity of the central portion viewed in the longitudinal direction of the force with which the wiping portion 11a is pressed against the wiping surface S is the most. This is because the weakening bias can be eliminated (see the flat characteristic line shown by the solid line).

  Further, in the wiper blade 10, since the inclined surface portion 14c and the rib portion 14d are formed on the upper surface 14b of the cover member 14 over the entire length as viewed in the longitudinal direction, as shown in FIG. The air flow to the member 14 is applied to the inclined surface portion 14c and smoothly flows to the rib portion 14d, and is received by the inclined surface portion 14c and the rib portion 14d, so that the wiper blade 10 is covered over the entire length viewed in the longitudinal direction. A force to be pressed against the wiping surface S can be generated, and the lift from the wiping surface S can be canceled.

  In the wiper blade 10 according to the present invention, the following effects can be obtained.

  In the wiper blade 10, since the cover member 14 is provided, the attachment means 15 can be prevented from being exposed to the outer surface, and the vertebra 12 as a spring plate member can be prevented from being exposed to the outer surface. can do. Here, since the cover member 14 is formed of a member capable of elastic deformation such as rubber or a synthetic resin material, the outer surface of the wiper blade 10 is formed of a relatively soft member capable of elastic deformation. Since it is constituted by the blade rubber 11 and the cover member 14, even if the user of the vehicle C contacts the wiper blade 10, for example, at the time of car washing and replacement of the wiper blade 10, the contact The unexpected situation can be avoided. In addition to this, for example, in the scene where the vehicle C encounters an accident, there is a possibility that a pedestrian or the like may come into contact with the wiper blade. However, in the wiper blade 10 according to the present invention, the outer surface is configured by a relatively soft member. In addition, since the vertebra 12 is also configured to be elastically deformable, safety when the pedestrian comes into contact can be further improved.

  In the wiper blade 10, the upper surface 11 f of the head 11 c of the blade rubber 11 is brought into surface contact with the lower surface of the vertebra 12 as a spring plate member, and the blade rubber 11 is attached to the vertebra 12. The pressing force applied from 20 to the wiping surface S can be efficiently applied to the attachment means 15. For this reason, the blade rubber 11 (wiping part 11a) is wiped with a substantially uniform pressing force over the entire length of the blade rubber 11 by the pressing force applied to the wiping surface S provided from the wiper arm 20 via the attachment means 15. It can be brought into contact with the surface S, and good wiping performance can be obtained.

  Further, in the wiper blade 10, since the rectifying plate portion 23 is provided on the cover member 14, even in the return path B, the wiping portion 11a is pressed against the wiping surface S with a uniform pressing force over its entire length. The wiping surface S can be wiped off satisfactorily. Here, the wiping surface S by receiving the traveling wind W by generating the force that presses the wiper blade 10 against the wiping surface S side by receiving the air flow when the rectifying plate portion 23 is traveling in the return path B. Therefore, when the lift from the wiping surface S due to the traveling wind W changes according to the traveling speed of the vehicle C, the rectifying plate portion 23 travels along the return path B. Since the force of pressing the wiper blade 10 against the wiping surface S is changed by receiving the air flow when the vehicle is running, good wiping performance can be ensured regardless of the traveling speed of the vehicle C.

  In the wiper blade 10, since the inclined surface portion 14 c and the rib portion 14 d are formed on the upper surface 14 b of the cover member 14 over the entire length as viewed in the longitudinal direction, the lift force from the wiping surface S even in the return path B. Thus, the wiping portion 11a can be pressed against the wiping surface S with an appropriate pressing force, and the wiping surface S can be wiped well.

  Therefore, the wiper blade 10 can prevent the attachment means 15 from being exposed to the outer surface while ensuring good wiping performance.

  In the above-described embodiment, the wiping surface S is the windshield of the vehicle C, but may be a rear glass, for example, and is not limited to the above-described embodiment.

  In the above-described embodiment, the cover member 14 that uses the traveling wind W has been described. However, the present invention is not limited to this, and for example, a substantially semicircular cross section that is symmetric when viewed in a cross section orthogonal to the longitudinal direction. The cover member may be used.

  Further, in the above-described embodiment, the cover member 14 is provided with the rectifying plate portion 23 at the central portion 14C. However, the cover member 14 can accommodate the vertebra 12 and the attaching means 15 for holding it, and can be elastically deformed. Any material may be used as long as it is made of any material, and the present invention is not limited to the above-described embodiments.

  In the above-described embodiment, the attachment means 15 is configured by attaching the clip 18 to the clip base 17 attached to the vertebra 12 via the rivet 16. However, the attachment means 15 can be connected to the wiper arm 20 and can be connected to the vertebra 12. As long as it can be attached to the substantially central portion of the above, it is not limited to the above-described embodiment.

  In the above-described embodiment, the rectifying plate portion 23 is provided corresponding to the central portion 14C of the cover member 14 that is raised so as to accommodate the attachment means 15 (region Ac (see FIG. B)))))))), it is only necessary to assist the wiping portion 11a of the blade rubber 11 in contact with the wiping surface S with a uniform pressing force as seen in the longitudinal direction. It is not limited. For example, the blade rubber 11 (wiping part 11a) faces the wiping surface S by being pressed from the wiper arm 20 via the attaching means 15 in the vertebra 12 (spring plate member) curved like a bow in the longitudinal direction. In consideration of the spring characteristic that the central part 12a is likely to float with respect to the wiping surface S in the contact state, the central part 12a may be provided so that the spring characteristic can be canceled.

1 is a schematic perspective view showing a vehicle equipped with a wiper blade according to the present invention. It is a typical perspective view which shows the wiper blade which concerns on this invention. It is a disassembled perspective view explaining the structure of the wiper blade which concerns on this invention. It is sectional drawing seen in the II arrow direction shown in FIG. It is a figure explaining the structure of an attachment means, Comprising: (a) is a disassembled perspective view, (b) is sectional drawing seen in the III-III arrow direction shown to (a). It is sectional drawing seen in the II-II arrow direction shown in FIG. It is explanatory drawing for demonstrating an effect | action of the baffle plate part of the cover member which receives the driving | running | working wind in a return path. It is a graph which shows typically the distribution seen in the elongate direction of the force in which a wiping part presses a wiping surface in a return way. It is explanatory drawing for demonstrating the effect | action of the inclined surface part and rib part of the cover member which receive the driving | running | working wind in a return path.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Wiper blade 11 Blade rubber 11a Wiping part 11b Head part 11f Upper surface 12 Vertibra (as a spring board member) 12a Center part 14 Cover member 14a Lower surface 14b Upper surface 14e Side surface 15 Mounting means 20 Wiper arm 21 Housing groove part 22 Opening opening 23 Rectification Plate part 23a Current plate inclined surface S Wiping surface C Vehicle W Running wind

Claims (4)

A blade rubber that has a long shape and has a wiping portion at the top and a wiping portion at the top as viewed in a cross section perpendicular to the longitudinal direction, and a length that fits the head of the blade rubber. A spring plate member having a scale shape that is concave and viewed in the longitudinal direction when viewed from the blade rubber side and is attached to the head so as to be in surface contact with the upper surface of the head, and a substantially central portion of the spring plate member The spring plate member is formed of an attachment means capable of holding the spring plate member and being connectable to a wiper arm provided in the vehicle, and a member having an elastic deformation, and having a long shape adapted to the spring plate member. And a cover member mounted on the spring plate member so as to cover the blade, and reciprocatingly move on the wiping surface in a direction crossing the longitudinal direction of the blade rubber and the spring plate member by swinging the wiper arm. Be done A Lee par blade,
In the cover member, an accommodation groove portion that opens along the longitudinal direction of the lower surface facing the wiping surface and can accommodate the spring plate member and the attachment means holding the spring plate member together, A wiper blade, characterized in that a mounting opening that communicates with a central portion of the receiving groove while opening an upper surface of the cover member so as to enable connection between the mounting means and the wiper arm is provided.   One of the reciprocating directions includes a direction against running wind generated on the wiping surface as the vehicle travels, and the cover member has a center position viewed in the longitudinal direction. A predetermined region at the center, and extending in parallel with the wiping surface toward the traveling direction on a side surface facing the traveling direction side of one of the reciprocating directions including a direction against running wind. The wiper blade according to claim 1, wherein a rectifying plate portion is provided.   3. The wiper blade according to claim 2, wherein the rectifying plate portion forms an inclined surface that forms an elevation angle with respect to the wiping surface as viewed from the front side in the traveling direction.   The predetermined region provided with the rectifying plate portion is a region in which a front projection area as viewed from the front side in the traveling direction is increased by accommodating the attachment means when viewed in the longitudinal direction of the cover member. The wiper blade according to claim 3, wherein the wiper blade is set based on the wiper blade.

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