JP2007176459A - Wiper blade - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wiper blade capable of attaching a cap to an end portion of a blade rubber regardless of a shape of a fin portion. <P>SOLUTION: The wiper blade 10 comprises the blade rubber 16 for wiping a wiping surface; a backing 18 made from a spring material provided in a longitudinal direction of the blade rubber 16; a lever 20 to which a wiper arm 12 is rotatably coupled and holding the blade rubber 16 and the backing 18; the fin portion 30 raised in the longitudinal direction of the blade rubber 16 from an opposite side to the wiping surface side on the blade rubber 16, and converting wind pressure of traveling wind at the time of vehicle traveling into pressing force on the wiping surface side; and the cap 40 attached to a longitudinal direction end portion of the blade rubber 16 so as to expose a longitudinal end portion of the fin portion 30 from a slit 42. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wiper blade for wiping a wiping surface such as a windshield glass of a vehicle.

As the wiper blade, a holder (fastener) to which the wiper arm is connected is fixed to the center in the longitudinal direction of the backing (elastic arm), and a blade rubber and a wing-shaped rubber cover are attached to the backing, and fitted to the rubber cover. A rubber end cover that covers the longitudinal end of the backing is known (see, for example, Patent Document 1).
Registered Utility Model No. 3107550

  However, in the conventional technology as described above, since the end cover is fitted on the wing-shaped rubber cover, a dedicated end cover is provided for each rubber cover shape (wing shape) according to the wiper blade specifications. I had to prepare. For this reason, since there are many types of parts, the parts management is complicated and the cost is increased.

  An object of the present invention is to obtain a wiper blade capable of attaching a cap to an end portion of a blade rubber regardless of the shape of the fin portion in consideration of the above fact.

  In order to achieve the above object, a wiper blade according to the first aspect of the present invention comprises a blade rubber for wiping the wiping surface, a backing made of a spring material provided along the longitudinal direction of the blade rubber, and a wiper arm. Is connected to the blade rubber or the connecting member for holding the backing, and the blade rubber is erected along the longitudinal direction of the blade rubber from the side opposite to the wiping surface side of the blade rubber. A fin portion that converts the wind pressure of the traveling wind into a pressing force against the wiping surface during traveling, and a longitudinal end portion of the fin portion is exposed from an exposure port, and is attached to a longitudinal end portion of the blade rubber. And a cap.

  In the wiper blade according to the first aspect, the pressing force from the wiper arm toward the wiping surface is transmitted to the backing through the connecting member, and the backing made of the spring material disperses the pressing force in the longitudinal direction of the blade rubber. In addition, when the vehicle is traveling, the blade rubber follows the wiping surface by converting the wind pressure of the traveling wind into a pressing force against the wiping surface.

  Here, since the fin portion is exposed from the exposure opening formed in the cap, in other words, since the cap does not cover the entire fin portion, the fin portion is provided to the longitudinal end of the blade rubber. In the configuration, the cap can be used in common even when the standing height and the outer shape of the fin portion are different, and standardization of parts can be achieved.

  Thus, in the wiper blade according to the first aspect, the cap can be attached to the end portion of the blade rubber regardless of the shape of the fin portion.

  A wiper blade according to a second aspect of the present invention is formed of a blade rubber for wiping the wiping surface and a spring material, and a groove for backing is formed along the longitudinal direction, and is fitted into the backing groove of the blade rubber. Arm portions extending from both sides of the blade rubber in the longitudinal direction of the blade rubber from a holder portion to which the wiper arm is pivotally connected, and a tip of the blade rubber and the holder portion respectively provided on each arm portion A lever member that holds the blade rubber or the backing by a holding portion disposed in the middle of the lever, and an arm that is provided on the arm portion of the lever member and receives a traveling wind during vehicle traveling and is directed toward the wiping surface A first fin portion having an inclined surface that is inclined so as to cause a problem, and a side opposite to the wiping surface side in the blade rubber A second fin portion that is provided along the longitudinal direction of the blade rubber and has an inclined surface that is inclined so as to generate a pressing force directed to the wiping surface side by receiving a traveling wind during vehicle traveling; It has an exposure opening formed in a cut shape that opens toward the center in the longitudinal direction, and the longitudinal end of the second fin portion is exposed from the exposure opening and attached to the longitudinal end of the blade rubber. And a cap.

  In the wiper blade according to claim 2, the pressing force to the wiping surface side from the wiper arm inputted to the holder portion of the lever member is applied to the backing groove of the blade rubber from the arm portion of the lever member via the holding portion. It is transmitted to the inserted backing, and the backing made of the spring material disperses this pressing force in the longitudinal direction of the blade rubber. Further, when the vehicle is traveling, the blade rubber follows the wiping surface by converting the wind pressure of the traveling wind received by the first and second fin portions on the respective inclined surfaces into the pressing force to the wiping surface side.

  Here, since the second fin portion is exposed from the exposure port by inserting the longitudinal end portion of the second fin portion into the notch-shaped exposure port formed in the cap, the longitudinal end of the blade rubber is formed. In the configuration in which the second fin portion is provided up to the portion, the cap can be used in common even when the standing height and the outer shape of the second fin portion are different, and standardization of parts can be achieved.

  Thus, in the wiper blade according to the second aspect, the cap can be attached to the end portion of the blade rubber regardless of the shape of the fin portion. Further, the first fin portion provided on the arm portion of the lever member and the second fin portion which is exposed from the exposure port and can be erected to the longitudinal end portion of the blade rubber, almost in the entire length direction of the wiper blade. It is possible to exhibit a fin function that converts the traveling wind into a pressing force against the wiping surface.

  A wiper blade according to a third aspect of the present invention is the wiper blade according to the first or second aspect, wherein the cap has a locking portion that is locked to the blade rubber or backing on the inner surface side. .

  In the wiper blade according to claim 3, since the engaging portion is formed on the inner surface side of the cap, the cap is attached to the blade rubber (the longitudinal end portion of the blade rubber enters the cap) by the operation. Is locked to the blade rubber or backing. Thereby, mounting | wearing of a cap is easy. Moreover, since the latching | locking part is located in an inner surface side, it looks good.

  A wiper blade according to a fourth aspect of the present invention is the wiper blade according to any one of the first to third aspects, wherein the cap is erected along an edge portion of the exposure port, and the fin portion or It has a pair of support walls which support the base of 2 fin parts from the width direction both sides of the said blade rubber.

  In the wiper blade according to claim 4, the fin portion or the second fin portion whose root is supported by the support wall of the cap is prevented from falling and deforming due to the traveling wind, and the wind pressure of the traveling wind increases. Can generate stable pressing force.

  A wiper blade 10 according to an embodiment of the present invention will be described with reference to FIGS. For convenience of explanation, an arrow L, an arrow W, and an arrow V that are appropriately shown in the drawings indicate the longitudinal direction, the width direction, and the vertical direction of the wiper blade 10 (contact and separation directions with respect to the wiping surface), respectively.

  FIG. 1 is a perspective view showing the overall configuration of the wiper blade 10, and FIG. 2 is an exploded perspective view of the wiper blade 10. As shown in these drawings, the wiper blade 10 is connected to the tip of the wiper arm 12, and is configured to wipe the front windshield glass 14 while moving in the width direction as the wiper arm 12 swings. A blade rubber 16 for wiping the front windshield glass 14, a backing 18 for imparting rigidity to the blade rubber 16, a connecting member for connecting the blade rubber 16 and the wiper arm 12, and a lever 20 as a lever member. It is configured as a main component.

  As shown in FIGS. 1 and 2, the blade rubber 16 is a long member that is elongated in the longitudinal direction of the wiper blade 10 as a whole, and is provided with a base 22 and a front window provided below the base 22. A wiping portion (lip portion) 24 for wiping the shield glass 14 and a neck portion 26 that connects the base portion 22 and the wiping portion 24 and elastically deforms in the falling direction when the front windshield glass 14 is wiped are integrally formed. ing. The wiping portion 24 has a substantially inverted triangular shape when viewed from the end in the longitudinal direction.

  A pair of backing grooves 28 that are elongated along the longitudinal direction are provided on both sides in the width direction of the base portion 22 of the blade rubber 16. The pair of backing grooves 28 are opened outward in the width direction of the base portion 22, and are opened at both longitudinal ends of the base portion 22. In other words, each backing groove 28 is formed over the entire length of the base portion 22, that is, the blade rubber 16 in the longitudinal direction.

  Each of the backing grooves 28 is fitted with a backing 18 for imparting a predetermined rigidity (forming a skeleton) to the blade rubber 16. Each backing 18 is configured as a metal plate that is elongated along the longitudinal direction of the blade rubber 16, and has a curvature larger than the maximum curvature in the wiping range of the front windshield glass 14 in a natural state (no load state). It has a curved shape. In FIG. 2, the backing 18 is shown in a straight line.

  These backings 18 are projected upward (in the direction opposite to the front windshield glass 14), and are fitted into the backing grooves 28 of the blade rubber 16, respectively, and the respective longitudinal ends thereof are fitted. It corresponds to the longitudinal end of the backing groove 28 formed.

  The blade rubber 16 in which the backing 18 is mounted in each backing groove 28 distributes the pressing force from the wiper arm 12 transmitted through the lever 20 by the deformation of each backing 18 in the longitudinal direction, while the front windshield glass 14 It is the structure which follows a curvature. That is, each backing 18 is configured to perform the function of causing the blade rubber 16 to follow the curvature of the front windshield glass 14 and the function of distributing (dispersing) the pressing force from the wiper arm 12 in the longitudinal direction of the blade rubber 16. Has been.

  Further, a fin portion 30 as a second fin portion is erected from the base 22 of the blade rubber 16 opposite to the wiping portion 24, that is, from the upper surface 22 </ b> A of the base 22. As shown in FIGS. 4A and 4C, the fin portion 30 has a wind receiving surface 30A as an inclined surface in which one surface in the width direction is inclined (curved) with respect to the vertical direction. The wiper blade 10 is assembled to the vehicle so that the wind receiving surface 30A faces the traveling direction (front of the vehicle). Further, the fin portion 30 is arranged such that the top portion 30B of the fin portion 30 is offset to the opposite side of the wind receiving surface 30A from the center line (not shown) of the blade rubber 16 (wiper blade 10) in the width direction. Yes. Thereby, the restriction on the inclination angle of the wind receiving surface 30A is reduced.

  Accordingly, the fin portion 30 is configured to convert the wind pressure of the traveling wind into a pressing force to the front windshield glass 14 side when receiving the traveling wind on the wind receiving surface 30A during traveling of the vehicle. As shown in FIG. 2, in this embodiment, the fin portion 30 is erected over substantially the entire length of the base portion 22 except for the central portion in the longitudinal direction of the blade rubber 16 and part of both ends in the longitudinal direction. The fin portion 30 described above is made of a rubber material and is formed integrally with the blade rubber 16.

  The lever 20 includes a holder portion 32 that is rotatably connected to the wiper arm 12, a pair of arm portions 34 that extend from both ends in the longitudinal direction of the holder portion 32, and a tip of the arm portion 34. The holding portion 36 formed on the upper surface of the arm portion 34 and the fin portion 38 as the first fin portion formed on the upper surface side of the arm portion 34 are configured as main components.

  The holder part 32 has a pair of side walls 32A facing in the width direction and a connecting pin 32B that bridges the pair of side walls 32A in the width direction, and via a clip (not shown) inserted between the pair of side walls 32A. The wiper blade 10 is connected to the tip of the wiper arm 12 so as to be rotatable around a connecting pin 32B.

  Each arm portion 34 has such a length that the holding portion 36 formed at the tip thereof is positioned at a position where the blade rubber 16 is divided into approximately three equal parts. Each arm portion 34 is formed to open downward in a cross-sectional view orthogonal to the longitudinal direction, and the base portion 22 of the blade rubber 16 is inserted inside each arm portion 34. The holding portion 36 is configured by extending a holding piece 36A inward in the width direction from the downward opening end of the arm portion 34, and by inserting the base portion 22 between the upper wall portion 36B and the holding piece 36A, the blade The rubber 16 is configured to be held so as not to fall off in the vertical direction. Further, the arm portion 34 and the holding portion 36 prevent the backing 18 fitted in each backing groove 28 from falling off in the width direction with respect to the base portion 22.

  Further, one of the two holding portions 36 holds the blade rubber 16 so as to be capable of relative displacement in the longitudinal direction, and the other of the two holding portions 36 cannot be relatively displaced (dropped) in the longitudinal direction with respect to the blade rubber 16. The blade rubber 16 is connected to the blade rubber 16 or the backing 18 to hold the blade rubber 16. Explanation and illustration of these holding structures are omitted. The lever 20 is configured such that a gap is formed between the holder portion 32 and the upper surface 22A of the base portion 22 when the blade rubber 16 is held by the holding portions 36.

  As described above, in the wiper blade 10, the pressing force to the front windshield glass 14 side input from the wiper arm 12 to the holder portion 32 of the lever 20 is transmitted to the backing 18 in the two holding portions 36, and this pressing force is transmitted to the blade 18 by the backing 18. The rubber 16 is distributed in the longitudinal direction. That is, unlike the so-called tournament type wiper blade, the wiper blade 10 does not include a lever assembly including a plurality of levers for causing the blade rubber 16 to follow the front windshield glass 14.

  The fin portion 38 is a wind receiving surface 38A as an inclined surface in which the surface on the same side as the wind receiving surface 30A of the fin portion 30 in the width direction is inclined (curved) with respect to the vertical direction. The receiving surface 38A is assembled to the vehicle so as to face the traveling direction (front of the vehicle). Further, the fin portion 38 is arranged such that the top portion 38B is offset with respect to the center line in the width direction of the wiper blade 10 on the side opposite to the formation side of the wind receiving surface 38A. Thereby, the area of the wind receiving surface 38A can be formed larger, and the restriction on the inclination angle is reduced.

  Accordingly, the fin portion 38 is configured to convert the wind pressure of the traveling wind into a pressing force toward the front windshield glass 14 when receiving the traveling wind on the wind receiving surface 38A during traveling of the vehicle. As shown in FIG. 2, in this embodiment, the fin portion 38 is erected over the entire length of the arm portion 34. In this embodiment, the fin portion 38 has the top portion 38 </ b> B inclined so that its height decreases toward the end in the longitudinal direction (on the side opposite to the holder portion 32).

  As for the lever 20 demonstrated above, the holder part 32, each arm part 34, the holding | maintenance part 36, and the fin part 38 are integrally formed by the press work of a board | plate material. For this reason, an accommodation recess 38 </ b> C is formed on the lower side (back side) of each fin portion 38. The lever 20 fits (accommodates) the end of the fin portion 30 on the center side in the longitudinal direction in the accommodating recess 38 </ b> C in a state where the blade rubber 16 is held in each holding portion 36. Thus, in the wiper blade 10, the fin portion 30 of the blade rubber 16 and the fin portion 38 of the lever 20 are continuous in the longitudinal direction, and the fin portion 30 and the fin portion 38 are continuous in appearance. It has become.

  As shown in FIGS. 1 and 2, caps 40 are respectively attached to both ends of the blade rubber 16 in the longitudinal direction. As shown in FIGS. 5A to 5C, the cap 40 closes the upper wall 40A and the lower wall 40B facing each other in the vertical direction, the pair of side walls 40C facing each other in the width direction, and the ends in the longitudinal direction. End wall 40D that opens toward the center in the longitudinal direction, and the inside serves as an accommodating portion 40E. The upper wall 40A, the lower wall 40B, and the end walls 40D are rounded so that the edges are arcuate in plan view.

  As shown in FIG. 3B, the upper wall 40A is formed with a slit 42 as an exposure opening for allowing the end portion in the longitudinal direction of the fin portion 30 to enter (project upward). The slit 42 is formed in a cut shape that is elongated along the longitudinal direction of the blade rubber 16 (fin portion 30) and opens at an opening end facing the center side in the longitudinal direction of the cap 40.

  On the other hand, a slit 44 is formed in the lower wall 40B. The slit 44 is formed along the longitudinal direction of the blade rubber 16, and is formed as a notch that opens at an opening end facing the longitudinal center of the cap 40. A narrow portion 22B (see FIG. 4A) formed below each backing groove 28 in the base portion 22 of the blade rubber 16 enters the slit 44.

  As shown in FIGS. 3A and 3B, the cap 40 has a blade in the accommodating portion 40E so that the fin portion 30 is inserted into the slit 42 and the narrow portion 22B is inserted into the slit 44. The ends of the rubber 16 in the longitudinal direction are fitted. Therefore, in this fitted state, the accommodating portion 40E of the cap 40 and the fin portion 30 of the blade rubber 16 are arranged so as to overlap (overlap) in the longitudinal direction of the blade rubber 16. Further, in this fitted state, the holding portion of the backing 18 in the base 22 is held from above and below between the opposing surfaces 40F of the upper wall 40A and the lower wall 40B on both sides in the width direction with respect to the slits 42 and 44. Yes.

  Further, from the edge of the slit 42 on the upper wall of the cap 40, a U wall 46 formed in a substantially U shape in a plan view is erected along the edge. The U wall 46 is formed sufficiently lower than the fin portion 30. The front wall 46A located on the wind receiving surface 30A side in the width direction of the U wall 46 is formed in an inclined (curved) shape following the root portion of the wind receiving surface 30A. Further, the rear wall 46 </ b> B located on the opposite side of the U wall 46 from the front wall 46 </ b> A is shaped to follow the root portion on the back side of the fin portion 30. Thereby, as shown in FIG. 4C, the U wall 46 supports the longitudinal ends of the fin portion 30 in the width direction (thickness direction) by the front wall 46A and the rear wall 46B as a pair of support walls. It is like that.

  Further, as shown in FIG. 4B, the cap 40 has locking pieces 48 as locking portions that protrude from the inner surfaces of the pair of side walls 40C. As shown in FIG. 4 (A), these locking pieces 48 are formed in locking recesses 50 formed at the longitudinal ends of the backings 18 so as to face the outside in the width direction. Engageable into the edge. The locking piece 48 enters the locking recess 50 on both sides in the longitudinal direction of the blade rubber 16, that is, the backing 18 (the cap 40 is attached), thereby preventing the backing 18 from falling off from the blade rubber 16 in the longitudinal direction. It is like that.

  That is, in this embodiment, the cap 40 functions to cover the longitudinal end portion (edge portion) of the backing 18 and to prevent the backing 18 from falling off the blade rubber 16. Further, the cap 40 mounted on the blade rubber 16 is prevented from falling off by the engagement between the locking piece 48 and the locking recess 50 on both sides in the longitudinal direction.

  The locking piece 48 is formed by the base 22 or the cap 40 in accordance with the operation (relative displacement along the longitudinal direction) of inserting the end portion of the blade rubber 16 in which the backing 18 is inserted into the backing groove 28 into the accommodating portion 40E. By appropriately elastically deforming, the locking recess 50 is installed, and by restoring from the elastically deformed state, the locking recess 50 enters the locking recess 50.

  The cap 40 described above is made of resin, and each part is integrally formed by resin molding.

  Next, the operation of the present embodiment will be described.

  In the wiper blade 10 having the above configuration, when the wiper arm 12 swings substantially along the front windshield glass 14 by a wiper drive mechanism (not shown), the wiper blade 10 receives the pressing force from the wiper arm 12 and rotates to the connecting pin 32B. In addition, by deforming the backing 18 together with the blade rubber 16, the wiping portion 24 of the blade rubber 16 is displaced in the width direction while causing the wiping portion 24 of the blade rubber 16 to follow the curvature (change) of the front windshield glass 14. The front windshield glass 14 is wiped at the wiping portion 24.

  During the travel (advance) of the automobile on which the wiper device including the wiper blade 10 is mounted, the wind receiving surface 30A of the fin portion 30 and the wind receiving surface 38A of the fin portion 38 receive the traveling wind, respectively. Is converted into a pressing force in a direction in which the wiping portion 24 of the blade rubber 16 is pressed against the front windshield glass 14. As a result, a sufficient pressing force acts on the blade rubber 16 even when the vehicle is traveling at a high speed, and good wiping performance is ensured.

  Here, in the wiper blade 10, since the slit 42 is formed in the cap 40, the cap 40 interferes with the fin portion 30 even if the fin portion 30 is formed near the end of the blade rubber 16. The blade rubber 16 can be reliably mounted with a sufficient mounting allowance. Therefore, for example, as indicated by an imaginary line in FIG. 3B, the cap 40 can be attached to the blade rubber 16 in which the fin portion 52 having a shape different from the fin portion 30 and the standing height is formed. it can.

  8A and 8B, the wiper blade 100 including the cap 102 in which the slit 42 is not formed has a longitudinal end of the fin portion 30 at 102. A fin storage portion 104 for storing the portion is formed. That is, the fin storage unit 104 is a dedicated storage unit for the fin unit 30. For this reason, the fin part 52 whose standing height is higher than that of the fin part 30 or whose shape is different cannot be stored in the fin storage part 104, and it is necessary to prepare a dedicated cap for the fin storage part 104.

  On the other hand, the wiper blade 10 is provided with the slit 42 as described above, so that the wiper blade 10 can be securely attached to the longitudinal end portion of the blade rubber 16 without sufficient interference without interfering with the fin portion 30 or the fin portion 52. Therefore, the cap 40 can be used in common even when the standing height and outline shape of the fin portion are different, and standardization of the parts can be achieved.

  Thus, in the wiper blade 10 according to the first embodiment of the present invention, the cap 40 can be attached to the end portion of the blade rubber 16 regardless of the shape of the fin portion 30.

  Further, in the wiper blade 10, compared with the wiper blade 100 according to the comparative example, the overall height can be suppressed by the thickness t of the cap 102 (fin storage portion 104) shown in FIG. Furthermore, in the wiper blade 10, the parting line that is the stepped portion 104A (thickness t portion) at the opening end of the fin housing portion 104 does not occur in the R-shaped portion 30C at the longitudinal end portion of the top portion 30B of the fin portion 30. Good looking.

  Further, in the wiper blade 10, the slit 42 is formed in the cap 40, thereby realizing a configuration in which the fin portion 30 is provided to the longitudinal end portion of the blade rubber 16 while the cap 40 is made common. As a result, as compared with a configuration in which the fin portion 30 is not formed at the longitudinal end portion of the blade rubber 16, the pressing force converted from the wind pressure by the fin portion 30 at the time of high-speed traveling reaches the longitudinal end portion of the blade rubber 16. Since it acts, the followability with respect to the front windshield glass 14 at the longitudinal end of the blade rubber 16 is improved.

  Moreover, in the wiper blade 10, the fin portion 30 of the blade rubber 16 can continue to the fin portion 38 of the lever 20 and can exhibit a fin function over substantially the entire length. Further, the fin portion 30 is supported by the fin portion 38 (accommodating recess 38 </ b> C) at the end in the longitudinal direction of the blade rubber 16, and the base portion of the end of the fin portion 30 in the longitudinal direction of the cap 40. Since it is supported by the U wall 46 (the front wall 46A and the rear wall 46B), the rubber fin portion 30 is held in a posture that exhibits the fin function even when subjected to strong wind pressure during high-speed traveling.

  Further, in the wiper blade 10, since the locking piece 48 is formed in the accommodating portion 40E of the cap 40, the cap 40 is attached to the blade rubber 16 by inserting the end portion of the blade rubber 16 into the accommodating portion 40E. It can be mounted in a state that is easily prevented from falling off. Further, since the engaging portion is not exposed to the outside, the appearance is good. Furthermore, since the fin portion 30 is inserted into the slit 42 as described above, the accommodating portion 40E of the cap 40 and the fin portion 30 overlap in the longitudinal direction. In other words, the cap 40 and the blade rubber 16 are fitted to each other. Since there is no restriction on the total length, the cap 40 can be securely attached to the blade rubber 16 (an arrangement space for the structure is ensured). Furthermore, since the cap 40 having the U wall 46 has high rigidity, the locking state between the locking piece 48 and the locking recess 50 is reliably maintained.

  Next, another embodiment of the present invention will be described. Note that components and parts that are basically the same as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and description thereof is omitted.

(Second Embodiment)
FIG. 6A shows an end portion in the longitudinal direction of the wiper blade 60 according to the second embodiment in an exploded perspective view corresponding to FIG. FIG. 6B shows a side view of the cap 40 constituting the wiper blade 60 as viewed from the opening side facing the center in the longitudinal direction. As shown in these drawings, the wiper blade 60 is provided with a locking projection 62 at the longitudinal end of the blade rubber 16 in place of the locking recess 50 provided in the backing 18. This is different from the wiper blade 10 according to the embodiment.

  Specifically, the locking projections 62 project outward in the width direction from the upper and lower sides of each backing groove 28 in the base 22 in the vicinity of the longitudinal end of the blade rubber 16. Further, the locking piece 48 of the cap 40 is configured to be vertically higher than the locking piece 48 in the first embodiment, and can be locked to the upper and lower locking projections 62.

  In the wiper blade 60, when the longitudinal end portion of the blade rubber 16 is inserted into the accommodating portion 40E and the locking piece 48 gets over the locking projection 62, the engagement between the locking piece 48 and the locking projection 62 is achieved. Thus, the cap 40 is prevented from falling off the blade rubber 16, and the cap 40 prevents the backing 18 from falling off in the longitudinal direction from the blade rubber 16. In this embodiment, since the cap 40 is directly locked to the blade rubber 16, it is possible to prevent the backing 18 from falling off to one side in the longitudinal direction alone on one side in the longitudinal direction.

  Other configurations of the wiper blade 60 are the same as the corresponding configurations of the wiper blade 10. Therefore, also with the wiper blade 60 according to the second embodiment, the same effect as the wiper blade 10 according to the first embodiment can be obtained by the same operation as the wiper blade 10 according to the first embodiment. .

(Third embodiment)
FIG. 7A illustrates an exploded perspective view corresponding to FIG. 4A of the longitudinal end portion of the wiper blade 70 according to the third embodiment. FIG. 7B shows the cap 40 constituting the wiper blade 70 in a cross-sectional view orthogonal to the longitudinal direction. As shown in these figures, in the wiper blade 70, the first protrusion is provided with a locking protrusion 72 at the longitudinal end of the fin portion 30 instead of the locking recess 50 provided in the backing 18. This is different from the wiper blade 10 according to the embodiment.

  Specifically, the locking projection 72 is located near the end portion in the longitudinal direction of the fin portion 30 from the root portion on the wind receiving surface 30A side and the opposite side of the wind receiving surface 30A of the fin portion 30, respectively. It protrudes so as to face the upper side and the outer side in the width direction. On the other hand, on the housing portion 40E (inner surface) side of the cap 40, a locking recess 74 as a locking portion is provided on the front wall 46A of the U wall 46, instead of the locking piece 48 formed on the pair of side walls 40C. Each is formed on the wall 46B.

  In the wiper blade 70, when the longitudinal end portion of the blade rubber 16 is inserted into the accommodating portion 40E and each locking projection 72 enters the corresponding locking recess 74, the locking projection 72, the locking recess 74, The cap 40 is prevented from falling off the blade rubber 16 by the engagement, and the cap 40 prevents the backing 18 from dropping in the longitudinal direction with respect to the blade rubber 16. In this embodiment, since the cap 40 is directly locked to the fin portion 30 (blade rubber 16), it is possible to prevent the backing 18 from falling off to one side in the longitudinal direction alone on one side in the longitudinal direction.

  Other configurations of the wiper blade 70 are the same as the corresponding configurations of the wiper blade 10. Therefore, also with the wiper blade 70 according to the third embodiment, the same effect as the wiper blade 10 according to the first embodiment can be obtained by the same operation as the wiper blade 10 according to the first embodiment. .

  In each of the above-described embodiments, the example in which the fin portion 30 is formed integrally with the blade rubber 16 (directly erected) is shown, but the present invention is not limited to this, and for example, the blade rubber 16 The fin portion 30 formed separately from the fin portion 30 may be bonded to the upper surface 22A of the base portion 22 by adhesion or the like. For example, the fin portion 30 formed separately from the blade rubber 16 and the upper surface of the base portion 22 A single backing may be sandwiched between 22A (joined by bonding or the like). That is, the present invention is not limited to the configuration in which the backing 18 is fitted into the backing groove 28.

  Moreover, in each said embodiment, although the cap 40 was shown locked to the backing 18, the blade rubber 16, or the fin part 30, the present invention is not limited to this, For example, the cap 40 is attached to the blade rubber 16 The cap 40 may be held by the blade rubber 16 by inserting a retaining pin or the like after mounting (insertion).

  Further, in each of the above embodiments, the cap 40 is provided for the purpose of mounting the cap 40 for preventing the backing 18 from falling off and covering the end portion, but the present invention is not limited to this. It may be provided for one of these functions, and may be provided, for example, for holding the blade rubber against the backing.

1 is a perspective view showing a schematic overall configuration of a wiper blade according to a first embodiment of the present invention. 1 is an exploded perspective view of a wiper blade according to a first embodiment of the present invention. It is a figure which expands and shows the principal part of the wiper blade which concerns on the 1st Embodiment of this invention, Comprising: (A) is a top view, (B) is a front view. It is a figure which decomposes | disassembles and shows the principal part of the wiper blade which concerns on the 1st Embodiment of this invention, Comprising: (A) is a disassembled perspective view of the longitudinal direction edge part of a blade rubber and a backing, (B) is the inside of a cap (C) is sectional drawing of an assembly | attachment state. It is a figure which shows the cap which comprises the wiper blade which concerns on 1st Embodiment in embodiment of this invention, Comprising: (A) is a top view, (B) is a front view, (C) is a side view. It is a figure which decomposes | disassembles and shows the principal part of the wiper blade which concerns on the 2nd Embodiment of this invention, (A) is a disassembled perspective view of the longitudinal direction edge part of a blade rubber and a backing, (B) is the inside of a cap FIG. It is a figure which decomposes | disassembles and shows the principal part of the wiper blade which concerns on the 3rd Embodiment of this invention, (A) is a disassembled perspective view of the longitudinal direction edge part of a blade rubber and a backing, (B) is the inside of a cap FIG. It is a figure which expands and shows the edge part of the wiper blade which concerns on the comparative example with embodiment of this invention, (A) is a top view, (B) is a front view.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Wiper blade, 12 ... Wiper arm, 14 ... Front windshield glass (wiping surface), 16 ... Blade rubber, 18 ... Backing, 20 ... Lever (connection member), 28 ... Backing groove, 30 ... Fin part (second fin part), 30A ... Wind surface (inclined surface), 32 ... Holder part, 34 ... Arm part, 36 ... Holding part, 38 ... fin part (first fin part), 38A ... wind receiving surface (inclined surface), 40 ... cap, 42 ... slit (exposed port), 46B ... rear wall (A pair of support walls), 46A... Front wall (a pair of support walls), 48... Locking piece (locking portion), 60.70... Wiper blade, 74 locking recess (locking portion) )

Claims (4)

A blade rubber for wiping the wiping surface;
A backing made of a spring material provided along the longitudinal direction of the blade rubber;
A wiper arm is rotatably connected, and a connecting member for holding the blade rubber or the backing;
A fin portion which is erected along the longitudinal direction of the blade rubber from the side opposite to the wiping surface side of the blade rubber, and converts the wind pressure of the traveling wind into a pressing force against the wiping surface side when the vehicle is traveling;
A cap attached to the longitudinal end of the blade rubber by exposing the longitudinal end of the fin portion from an exposure port;
Wiper blade with A backing rubber is formed along the longitudinal direction, and a blade rubber for wiping the wiping surface;
A backing made of a spring material and fitted in the backing groove of the blade rubber;
Arm portions are extended from both sides of the blade rubber in the longitudinal direction from a holder portion to which the wiper arm is pivotably connected, and provided at each arm portion at an intermediate portion between the tip of the blade rubber and the holder portion. A lever member for holding the blade rubber or the backing by a holding portion disposed;
A first fin portion that is provided on an arm portion of the lever member and has an inclined surface that is inclined so as to generate a pressing force directed to the wiping surface side by receiving a traveling wind during vehicle traveling;
The blade rubber is erected along the longitudinal direction of the blade rubber from the side opposite to the wiping surface side, and is inclined so as to generate a pressing force toward the wiping surface side upon receiving a traveling wind during vehicle traveling. A second fin portion having an inclined surface;
The wiper blade has an exposure opening formed in a cut shape that opens toward the longitudinal center side of the wiper blade, and the longitudinal end of the second fin portion is exposed from the exposure opening to expose the blade rubber in the longitudinal direction. A cap attached to the end;
Wiper blade with   The wiper blade according to claim 1, wherein the cap has a locking portion that is locked to the blade rubber or the backing on an inner surface side.   The said cap has a pair of supporting wall which stands up along the edge part of the said exposure opening | mouth, and supports the base of the said fin part or the 2nd fin part from the width direction both sides of the said blade rubber. The wiper blade according to any one of the above.

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