JP2008238844A - Wiper blade - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flat wiper blade smoothly turned around when it returns on a reciprocative moving path without reducing a wiping performance. <P>SOLUTION: This wiper blade 10 comprises a blade rubber 11 for wiping off the surface to be wiped S of a vehicle C; a vertebra 12; and a mounting means 16 for connecting the vertebra to a wiper arm 20. The wiper blade is reciprocatingly moved on the surface to be wiped S by the operation of the wiper arm. The mounting means 16 has a holding mechanism 30 and a connecting mechanism 50. The holding mechanism has a blade side pivot shaft 31 extending in the direction perpendicular to the longitudinal direction of the blade rubber and having an end part projecting to the connecting mechanism side. Also, the connecting mechanism has an arm side pivot shaft 51 having a projecting end part. The projecting end parts of these pivot shafts are so connected to each other through a connection pin 40 that the holding mechanism can be swung in the longitudinal direction. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  According to the present invention, a long-shaped spring plate member curved in a bow shape is addressed to a blade rubber, and a wiper provided in a vehicle via an attachment means provided in a central portion in the longitudinal direction of the spring plate member The present invention relates to a wiper blade connected to an arm.

  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, for example, a long-shaped spring plate member curved in a bow is applied to a long-shaped blade rubber for wiping the wiping surface, and the blade rubber is bent, and the spring plate member has its long length. It is pivotally supported by four yokes along the scale direction, each yoke is pivotally supported at both ends of the two secondary levers, and these two secondary levers are pivotally supported at both ends of the primary lever. It is known that a wiper blade (hereinafter referred to as a tournament type wiper blade) configured to be provided with attachment means is connected to a wiper arm provided on a vehicle via the attachment means.

  This tournament-type wiper blade is designed so that each connection point is parallel to the wiping surface and can be rotated around a direction perpendicular to the longitudinal direction, and the pressing force from the wiper arm is changed from the primary lever to the two secondary levers. Then, the blade rubber is abutted against the wiping surface with a uniform pressing force over the entire length by being transmitted to the spring plate member while being dispersed stepwise through the four yokes, and the blade as the wiper arm swings. A rubber wipes the wiping surface well by sliding on the wiping surface at an appropriate inclination angle.

  However, in a tournament-type wiper blade, when snow and ice adhere to the spring plate member to which the blade rubber is attached from the attachment means that becomes the attachment location to the wiper arm, and each connection location does not operate (turn), There is a possibility that the blade rubber cannot be properly brought into contact with the wiping surface and the wiping surface cannot be properly wiped.

  For this reason, the long-shaped blade rubber is directed to the long-shaped spring plate member curved in a bow shape so that the blade rubber is bent, and the vehicle is connected to the vehicle via the attachment means provided at the substantially central portion of the spring-plate member. A wiper blade (hereinafter referred to as a flat wiper blade) that is connected to a wiper arm provided on the door is considered (for example, see Patent Document 1). In the flat wiper blade, the pressing force from the wiper arm is evenly distributed in the longitudinal direction by the spring plate member, so that the blade rubber abuts against the wiping surface with a uniform pressing force over its entire length. As the arm swings, the blade rubber slides on the wiping surface at an appropriate inclination angle, thereby wiping the wiping surface well.

  By the way, since wiper blades are generally reciprocated on the windshield, the blade rubber to which the pressing force is applied to the wiping surface is at an appropriate inclination angle with respect to the wiping surface in the opposite direction between the forward path and the return path. Therefore, when shifting from the forward path to the return path or from the return path to the forward path, the inclination direction of the blade rubber is reversed (hereinafter referred to as reversal). In the flat wiper blade described above, the blade rubber is inverted when the round-trip path is turned back, depending largely on the deformation of the blade rubber. This is because there is no place where play is set in order to enable the operation from the attachment means to the wiper arm to the spring plate member to which the blade rubber is attached.

  On the other hand, in the tournament-type wiper blade described above, the distance between the attachment means, which is the attachment position to the wiper arm, and the spring plate member to which the blade rubber is attached is connected by a pivot that can be rotated between a plurality of levels. (In the example described above, between the primary lever and each secondary lever, between each secondary lever and each yoke, between each yoke and the spring plate member) Since play is provided to enable movement, when the round-trip path is turned back by swinging around the longitudinal direction due to the accumulated play of the connection place at each level position and bending deformation of the blade rubber The blade rubber is inverted.

  Therefore, in the flat type wiper blade, the blade rubber is softer than the tournament type wiper blade in order to smoothly invert the blade rubber when turning back and forth. However, the softness (deflection) of the blade rubber greatly affects the inclination angle when sliding on the wiping surface, so smooth reversal of the blade rubber can be achieved without reducing the wiping performance. It is difficult to set the softness to be possible.

In view of this, it is conceivable that a flat wiper blade may be configured to be capable of swinging around the longitudinal direction corresponding to the cumulative amount of play at each connection point. As a similar technology, in a tournament-type wiper blade, the primary lever and the attachment means are pivotably connected via a shaft member extending in the longitudinal direction of the blade rubber, thereby reducing blade rubber deterioration. It has been considered to prevent the smooth inversion due to the cause (see, for example, Patent Document 2).
JP 2003-146190 A Japanese Patent Laid-Open No. 2002-12130

  However, in the tournament-type wiper blade disclosed in Patent Document 2, the blade rubber is smoothed by swinging around the longitudinal direction caused by the play that is originally provided to enable rotation at each connection point. Since the amount of play at each connection point may change due to long-term use, the blade rubber should be kept at an appropriate angle of inclination with respect to the wiping surface. Is difficult, and the problem of adhesion of ice and snow remains. From these things, there exists a possibility that wiping performance may reduce with long-term use or a use condition.

  The present invention has been made in view of the above-described problems, and in a wiper blade of a flat type, a wiper blade capable of smoothly reversing the blade rubber when the reciprocating path is folded without causing a reduction in wiping performance. It is an issue to provide.

  In order to solve the above problems, a wiper blade of the present invention has a long shape for wiping a wiping surface of a vehicle, and is a wiping provided at a lower portion to slide the wiping surface when viewed in a cross section perpendicular to the longitudinal direction. A blade rubber having a head portion provided at a portion and an upper portion, and a long shape that fits the head portion of the blade rubber, and is bent in the long direction in a concave shape when viewed from the blade rubber side. A spring plate member provided along the same, and 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 the operation of the wiper arm The wiper blade is reciprocally moved on the wiping surface in a direction crossing the longitudinal direction, and the attachment means includes a gripping mechanism fixed to a substantially central portion of the spring plate member, the gripping mechanism, The wiper And a first support shaft that extends in a direction perpendicular to the longitudinal direction and has an end projecting toward the connection mechanism. The coupling mechanism is also provided with a second support shaft extending in the same direction and having an end projecting toward the gripping mechanism, and the pair of support shafts are configured to swing the gripping mechanism around the longitudinal direction. The protruding end portions are connected to each other by a connecting pin so as to be movable.

  Here, a connecting piece provided with a hole through which the connecting pin is inserted is provided at each end of the pair of support shafts, and an end surface of one connecting piece abuts a base surface from which the other connecting piece protrudes. It is preferable that the swinging is limited to a predetermined angle or less by contact.

  One of the base surfaces is formed with a ridge line at substantially the center in the swinging direction, and an end surface of the connecting piece to be in contact with the base surface is formed in a shape orthogonal to the axial direction of the support shaft. It may be a thing.

  Furthermore, the end surface of one of the connecting pieces is formed in a circumferential surface shape, and the other connecting piece is formed in a shape that comes into contact with the opposing base surface when the swing reaches a predetermined angle. May be.

  In addition, a ridge line is formed on the end surface of one of the connecting pieces at substantially the center in the swing direction, and the base surface that is in contact with the end surface is formed in a shape orthogonal to the axial direction of the support shaft. It may be a thing.

  According to the wiper blade of the present invention having the above-described configuration, in a flat wiper blade, the blade rubber can be smoothly reversed when the reciprocating path is turned back without reducing the wiping performance.

  That is, in the attaching means, the connecting mechanism connected to the wiper arm and the gripping mechanism fixed to the spring plate member are connected so that the protruding ends of the support shafts arranged on each of them can be swung by the connecting pin. The blade rubber that reciprocates on the wiping surface by the operation of the wiper arm can swing around the longitudinal direction that is perpendicular to the moving direction with respect to the wiper arm. The reversal of the blade rubber when the reciprocating path is turned back can be smoothed by the swinging around the direction and the bending deformation of the blade rubber.

  Moreover, since it is a structure of a flat type wiper blade, it can prevent that it becomes impossible to wipe a wiping surface appropriately due to adhesion of ice and snow.

  Furthermore, if the attachment means is configured to swing around the longitudinal direction, the swinging around the longitudinal direction and the bending deformation of the blade rubber facilitate smooth reversal of the blade rubber when the reciprocating path is folded back. Therefore, it is easy to set the angle at the time of swinging, and it is easy to cope with long-term use, and it is possible to prevent the wiping performance from being reduced due to long-time use or use conditions.

  Further, the connecting piece is provided at each end of the pair of support shafts provided in the gripping mechanism and the connecting mechanism, and the end surface of one connecting piece is brought into contact with the base surface from which the other connecting piece protrudes, thereby swinging. If the angle is limited to a predetermined angle or less, the swing angle can be set to a predetermined value with a simple configuration.

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

  2 is a perspective view schematically showing a state in which the wiper blade 10 according to the present embodiment is applied to the vehicle C, and FIG. 3 is a perspective view schematically showing the wiper blade 10. These are the typical perspective views which expanded and showed the wiper blade 10 to each component.

  As shown in FIG. 2, the wiper blade 10 is provided on the vehicle C in order to wipe the wiping surface S (here, the windshield) made of the windshield or rear glass of the vehicle C. As shown in FIGS. 3 and 4, the wiper blade 10 includes a blade rubber 11, a vertibra 12, six holders 13, a blade body 14, and two stoppers 15. Attached to C.

  The wiper blade 10 is fixed to a wiper arm 20 provided in the vehicle C as shown in FIG. Although not shown, the wiper arm 20 is connected to a wiper motor via a wiper link, and is capable of reciprocating along the wiping surface S by driving the wiper motor (see arrows G and B). Here, the wiper arm 20 is driven by a swing shaft for reciprocating motion, which is not shown in the drawing, provided near the lower side of the glass opening that forms the wiping surface S. When not, the stationary posture Ia is substantially along the lower side. The wiper blade 10 is mounted on the wiper arm 20 such that when the wiper arm 20 swings (operates), the direction intersecting the longitudinal direction of the wiper blade 10 (hereinafter referred to as the longitudinal direction) is the traveling direction. Yes. Here, the wiper blade 10 is wiped from an end G of the forward path G that is swung from the stationary posture Ia to the upper and rear sides of the vehicle C along the wiping surface S when the wiper arm 20 is driven. The wiping surface S is wiped by being reciprocated along a return path B swinging forward and downward along the surface S along the surface S. In the wiper blade 10, the blade rubber 11 is slid so as to reciprocate on the wiping surface S as the wiper arm 20 is driven.

  The blade rubber 11 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. FIG. 5 is a cross-sectional view taken along the line II in FIG. As shown in FIG. 5, the blade rubber 11 includes a wiping portion 11a that is in contact with the wiping surface S, a head portion 11b that is located above the wiping portion 11a, and a neck portion 11c that connects the wiping portion 11a and the head portion 11b. And an arm portion 11d protruding from the neck portion 11c. The cross-sectional shape of the wiping portion 11a has a substantially inverted triangular shape, and the cross-sectional shape of the head portion 11b has a rectangular shape. The neck part 11c forms a recessed part between the wiping part 11a and the head part 11b. The arm portion 11d protrudes obliquely upward from the neck portion 11c, and can come into contact with the lower wall surface 14a of the blade body 14 by tilting the neck portion 11c (see FIGS. 7 and 9). The wiping portion 11a is in contact with the wiping surface S at the lower wiping location 11e, and the wiping location 11e is slid on the wiping surface S (see FIGS. 2 and 5). The blade rubber 11 has a so-called neck inversion structure having the above-described shape. In this blade rubber 11, when the transition from the forward path G to the backward path B or from the backward path B to the forward path G is made by utilizing the bending deformation (neck reversal) (that is, the sliding direction to the wiping surface S changes to the opposite side. When the direction of inclination with respect to the wiping surface S is reversed (hereinafter referred to as reversal (see FIGS. 7 and 9)), and is reversed while being pressed against the wiping surface S by receiving a biasing force. Since the neck portion 11c is curved and the wiping portion 11a has an appropriate tilt angle with respect to the wiping surface S, the contact relationship of the wiping location 11e with the wiping surface S is made appropriate. At this time, the arm portion 11d abuts on the lower wall surface 14a of the blade body 14, thereby assisting the wiping portion 11a to have an appropriate tilt angle due to the curvature of the neck portion 11c (see FIGS. 7 and 9). A vertebra 12 is provided on the head 11 b of the blade rubber 11.

  As shown in FIG. 4, the vertebra 12 is formed in a long plate shape from a resin material or metal material having elasticity, and has a shape curved in a bow shape with respect to the long direction. When the central part 12a of the vertebra 12 that is curved like a bow is pushed down and flattened, the vertebra 12 serves to distribute this force and equalize it when viewed in the longitudinal direction of the vertebra 12. Therefore, the vertebra 12 functions as a spring plate member that is curved in the longitudinal direction so as to disperse the force when the center portion is pushed down and flattened. In the wiper blade 10, the vertebra 12 is disposed so that the wiping surface S (see FIG. 5) is positioned in a direction to be pushed down during use. A holder 13 is attached to the vertebra 12 for attaching the blade rubber 11.

  As shown in FIG. 5, 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 has an inverted convex shape when viewed in cross section. . A cutout 21 is formed in the lower wall portion 13 a of the holder 13. The cutout 21 extends along the extending direction of the vertebra 12 while maintaining a constant interval.

  In addition, an upper space located above the holder 13 and a lower space located below the holder 13 are defined. The upper space has a rectangular parallelepiped shape as a whole, and has a width and a height that can secure a horizontal width and a height required for inserting the vertical bra 12, and allows the vertical rib 12 to be received (FIG. 5). reference). On the other hand, the lower space has a rectangular parallelepiped shape that is narrower than the upper space, and the width and height dimensions necessary for inserting the head 11b (see FIG. 5) of the blade rubber 11 are secured. . The lower space has a structure in which both ends of the peripheral portion of the notch 21 of the holder 13 sandwich the neck 11c of the blade rubber 11 when the head portion 11b is inserted, and the blade rubber 11 does not fall out of the holder 13. (See FIG. 5). For this reason, the holder 13 holds the blade rubber 11 on the attached vertebra 12, so that the blade rubber 11 can be attached to the vertebra 12, and the length of the holder 13 is determined by the blade rubber 11 to the vertebra 12. Is set to a size that can provide sufficient mounting strength.

  The holder 13 attaches the blade rubber 11 to the vertical bra 12 so that the wiping portion 11e of the blade rubber 11 abuts against the wiping surface S over the entire length with uniform pressure. Thus, the attachment position and the number are appropriately set. In the present embodiment, as shown in FIG. 4, six holders 13 having the same shape and the same size are used, and each holder 13 is spaced at an appropriate interval along the extending direction of the vertebra 12. Are arranged evenly on the left and right with a central portion 12a, which is disposed on the vertebra 12 and on which a gripping mechanism 30 described later is mounted. A blade body 14 is attached to the vertical bra 12.

  As shown in FIG. 4, the blade body 14 has a long shape slightly longer than the vertebra 12, and is formed from an elastic material such as rubber using a mold (not shown). A fitting groove 24 is formed in the blade body 14 (see FIG. 4). As shown in FIG. 5, the fitting groove 24 extends in the longitudinal direction of the blade body 14 while exhibiting an inverted convex shape in which the cross-sectional shape can sandwich both side edges of the vertebra 12, and the groove opening 24 a The lower wall surface 14a of the blade body 14 is opened. The fitting groove 24 has a horizontal width and a height necessary for inserting the vertical bra 12 when viewed in a cross section orthogonal to the extending direction of the blade body 14, so that the vertical bra 12 can be fitted. ing. The fitting groove 24 opens the upper surface of the blade body 14 through an attachment opening 24 b provided in the center of the blade body 14. The fitting groove 24 of the blade body 14 accommodates the vertebra 12 in a state where the head 11b of the blade rubber 11 is held via the holder 13 with the wiping portion 11e of the blade rubber 11 exposed from the groove opening 24a. Can do. A stopper 15 (see FIG. 4) is attached to each end portion 14b of the blade body 14 in the accommodated state.

  As shown in FIG. 4, the stopper 15 includes a cylindrical receiving portion 15 a and a lid portion 15 b that closes one end portion thereof. Each stopper 15 is mounted so that each end portion 14b of the blade body 14 is received by the receiving portion 15a, and the lid portion 15b is at each end portion of the vertibra 12 to open the open end (14c) of the fitting groove portion 24 of the blade body 14. Shield. As a result, each stopper 15 prevents the blade rubber 11 from falling off the long end surface 14c of the blade body 14 to the outside, and improves the design of the appearance of the long end surface 14c of the blade body 14. Yes (see FIG. 3). In a state where the vertebra 12 is stored in the blade body 14, the central portion 12a of the vertebra 12 is exposed from the attachment opening 24b, and the attachment means 16 is attached to the central portion 12a.

  In the wiper blade 10 of the present embodiment, the attachment means 16 urges the blade rubber 11 to reverse so that the blade rubber 11 smoothly reverses when moving from the forward path G to the return path B or from the return path B to the forward path G. It is set as the structure which operate | moves. This will be described below. 6 is a cross-sectional view taken along line III-III in FIG.

  The attaching means 16 includes a gripping mechanism 30 and a connecting mechanism 50 as shown in FIGS. The gripping mechanism 30 is an attachment location to the vertebra 12, and the connecting mechanism 50 connects the gripping mechanism 30 and the wiper arm 20. The gripping mechanism 30 and the connection mechanism 50 are connected to each other by connecting the ends of the blade side support shaft 31 and the arm side support shaft 51 as support shafts provided by the connecting mechanism 40 to the blade rubber 11. Can be swung around the longitudinal direction.

  As shown in FIGS. 3, 4, and 6, the gripping mechanism 30 includes a blade-side support shaft 31 that extends in a direction orthogonal to the longitudinal direction, and a pair of opposed members whose distance is maintained by the blade-side support shaft 31. , Opposite wall portions 36, and a connecting wall portion 37 and a substrate portion 38 that connect the opposite wall portions 36 in the width direction of the vertebra 12 (a direction perpendicular to the longitudinal direction and parallel to the wiping surface S). Further, as shown in FIG. 1, a pair of opposed wall portions 36 are formed with a shaft hole 36 a through which the blade side support shaft 31 is inserted and a holding portion 39 that holds the vertebra 12 from both sides.

  As shown in FIG. 1, the blade-side support shaft 31 includes a cylindrical shaft portion 313, a plate-shaped connection piece 311 that protrudes so as to cut the center of one end of the shaft portion 313, and the connection piece. The base surface 312 from which 311 protrudes, the collar part 314 provided in the middle of the axial part 313, and the projection part 315 whose diameter is smaller than the axial part 313 protruding from the other end of the axial part 313 are provided.

  The connecting piece 311 is provided with a hole 311a through which the connecting pin 40 is inserted. In addition, a ridge line 312a is formed on the base surface 312 so that the approximate center of the shaft portion 313 in the vertical direction (a swinging direction, which will be described later) is the highest, and both sides thereof are inclined surfaces 312b having a constant gradient in the vertical direction. ing. That is, the ridge line 312 a is orthogonal to the side surface of the connecting piece 311, and the left and right sides of the connecting piece 311 are formed in a mountain shape by slopes 312 b extending from both sides of the ridge line 312 a toward the outer peripheral surface of the shaft portion 313.

  Further, as shown in FIG. 6, the flange portion 314 is a portion that comes into contact with and engages with the opposing wall portion 36 when the blade side support shaft 31 is inserted into the shaft hole 36a of the opposing wall portion 36. In the opposite wall portion 36 on the opposite side, the protrusion 315 protruding from the shaft hole 36a is crushed and engaged. That is, the blade-side support shaft 31 is attached so that the connecting piece 311 extends in the vertical direction as shown in FIG. 1, and is fixed so that the shaft portion 313 does not rotate.

  On the other hand, the connection mechanism 50 includes an arm-side support shaft 51 as a connection shaft, a clip base 17, and a clip 18.

  The clip 18 is made of synthetic resin, and can fix the tip 20a (see FIG. 2) of the wiper arm 20 provided in the vehicle C. The clip 18 is provided with a holding notch 18 a that can be rotatably held with respect to the arm-side support shaft 51 and into which the arm-side support shaft 51 can be fitted. A clip base 17 is provided to hold the clip 18.

  The clip base 17 has a pair of opposing wall portions 17b that are opposed to each other at both side edges of the clip 18 with the clip 18 interposed therebetween, and a bottom wall portion 17c that connects the opposing wall portions 17b. An operation notch 17e for facilitating operation of the operation claw 18b of the clip 18 is formed in the bottom wall portion 17c. The pair of opposing wall portions 17b are respectively provided with shaft holes 17a through which the arm side support shafts 51 are inserted.

  As shown in FIG. 1, the arm-side support shaft 51 includes a cylindrical shaft portion 513, a pair of connecting pieces 511 that protrude from one end of the shaft portion 513, and a base surface 512 that protrudes the connecting pieces 511. , A flange portion 514 formed on the shaft portion 513 side from the base surface 512, and a projection portion 515 having a smaller diameter than the shaft portion 513 protruding from the other end of the shaft portion 513.

  The pair of connecting pieces 511 are provided with holes 511a through which the connecting pins 40 are inserted. Further, the pair of connecting pieces 511 protrudes from the base surface 512 with an interval sufficient to accommodate the connecting piece 311 of the blade side support shaft 31. Further, the end surface 511b (see FIG. 7) of the connecting piece 511 is formed in a shape orthogonal to the axial direction of the arm side support shaft 51, in other words, a shape in which the side view of the connecting piece 511 is rectangular.

  Further, the connecting piece 511 has a length that prevents the connecting piece 311 from coming into contact with the base surface 512 of the arm side support shaft 51 even when the blade side support shaft 31 connected by the connecting pin 40 is tilted by swinging. Formed.

  On the other hand, when the arm-side support shaft 51 is inserted into the shaft hole 17a, the flange portion 514 is engaged with the opposing wall portion 17b on the gripping mechanism 30 side, and the protrusion 515 protrudes from the other shaft hole 17a. become. As shown in FIG. 6, the protrusion 515 is crushed and engaged with the opposing wall portion 17 b, so that the shaft portion 513 is fixed so as not to rotate.

  Further, the clip 18 is fitted to the arm side support shaft 51 so as to be swingable around the arm side support shaft 51 with respect to the clip base 17 by fitting the clip 18 from the holding notch 18a. .

  This attachment means 16 is attached as follows. In the state where the blade body 14 is inserted into the vertebra 12 holding the blade rubber 11 via the six holders 13, the central portion 12a (see FIG. 4) of the vertebra 12 exposed from the mounting opening 24b of the blade body 14 is interposed. As described above, the interval between the opposing wall portions 36 connected by the spanning wall portion 37 of the gripping mechanism 30 is widened, and the central portion 12a of the vertebra 12 is clamped and fixed by the clamping portions 39 of the opposing wall portions 36. Thus, the opposing wall portions 36 are made to face each other (see FIGS. 1 and 6). In this state, the gripping mechanism 30 is attached to the vertebra 12 by inserting the shaft portion 313 of the blade side support shaft 31 into the shaft holes 36a of the opposing wall portions 36 (see FIGS. 3 and 6). Then, the protruding portion 315 protruding from the shaft hole 36a is crushed and fixed so that the blade side support shaft 31 does not rotate.

  Subsequently, the connection piece 311 of the blade side support shaft 31 protruding toward the connection mechanism 50 is aligned so as to be sandwiched between the pair of connection pieces 511 of the arm side support shaft 51, and the holes 311a and 511a through which the connection pieces 311 and 511 communicate with each other. The coupling pin 40 is inserted into the, and a dropping prevention process (not shown) is performed. The coupling pin 40 is formed to have an outer diameter smaller than the inner diameters of the holes 311 a and 511 a, and the arm side support shaft 51 connected to the blade side support shaft 31 via the connection pin 40 is centered on the connection pin 40. It can swing.

  Then, the arm-side support shaft 51 is inserted into the shaft hole 17a of the clip base 17, the flange portion 514 is brought into contact with the opposing wall portion 17b, and the projection 515 at the other end is projected from the shaft hole 17a. The arm-side support shaft 51 is fixed in a state in which the protrusion 515 is crushed and relative rotation with respect to the clip base 17 is prevented.

  Subsequently, the holding notch 18 a of the clip 18 is fitted into the arm side support shaft 51, and the clip 18 is attached to the clip base 17. As a result, the clip 18 can swing around the arm-side support shaft 51 with respect to the clip base 17. The attachment means 16 is attached by such a procedure.

  Here, in the wiper blade 10, when viewed in the longitudinal direction, both end portions of the gripping mechanism 30 holding the vertebra 12 are brought into contact with the two holders 13 adjacent to the mounting opening 24 b of the blade body 14. The relative displacement between the attachment means 16 and the vertebra 12 along the longitudinal direction is prevented. In this state, a configuration may be adopted in which a shielding lid 48 (see FIG. 4) is attached so as to shield the opened upper end surface of the gripping mechanism 30. In the wiper blade 10 configured as described above, the tip end portion 20a of the wiper arm 20 is attached to the vehicle by being attached to the rotatable clip 18 (see FIG. 2).

  In the wiper blade 10 according to the present invention, the blade rubber 11 is smoothly reversed when moving from the forward path G to the backward path B or from the backward path B to the forward path G. The operation of the blade rubber 11 when the wiper blade 10 is reversed will be described.

  In the wiper blade 10, as described above, the wiping portion 11e of the wiping portion 11a of the blade rubber 11 presses the wiping surface S by the pressing force from the wiper arm 20 (see FIG. 6). In this state, when the wiper arm 20 is driven, the wiper blade 10 is reciprocated on the wiping surface S to wipe the wiping surface S (see FIG. 2). During this reciprocating movement, the blade rubber 11 has its head 11 b held by the gripping mechanism 30 of the attachment means 16 via the vertebra 12, so that the head 11 b is wiped as the wiper arm 20 is driven. It is reciprocated along S. However, since the wiping portion 11e of the wiping portion 11a of the blade rubber 11 is in contact with the wiping surface S and slides on the wiping surface S, the head 11b sees 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 11 and the vertebra 12, a swinging force as shown by an arrow R shown in FIG. 9 acts on the forward path G, and a swinging like the arrow L shown in FIG. Power will act. Here, since the vertebra 12 holding the head 11b of the blade rubber 11 is attached to the wiper arm 20 via the attachment means 16, the blade rubber 11 is placed on the wiping surface S in the forward path G and the return path B. On the other hand, a predetermined inclination angle is set.

  Specifically, in the case of the return path B, as shown in FIG. 7, since the clockwise swinging force L acts on the blade rubber 11, the gripping unit 16 fixedly attached to the vertical bra 12 by the mounting means 16. The clockwise swinging force L also acts on the mechanism 30 and the gripping mechanism 30 is tilted clockwise.

  As shown in the enlarged detail view of FIG. 8, this inclination is caused by the connecting piece of the arm-side support shaft 51 on the slope 312 b located above the ridge line 312 a of the base surface 312 on both sides of the connecting piece 311 of the blade-side support shaft 31. When the end surface 511b of the 511 contacts, the angle is limited to a predetermined angle or less.

  In the case of the forward path G, as shown in FIG. 9, a counterclockwise swinging force R acts on the blade rubber 11, so that the gripping mechanism fixedly attached to the vertical bra 12 by the attachment means 16. The counterclockwise swinging force R is also applied to 30. Then, since the gripping mechanism 30 can swing relative to the connection mechanism 50 provided with the clip 18 to which the wiper arm 20 is mounted, in the longitudinal direction, the gripping mechanism 30 is counterclockwise. It will be inclined. This inclination is predetermined when the end surface 511b of the connecting piece 511 of the arm side supporting shaft 51 comes into contact with the slope 312b located below the ridge line 312a of the base surface 312 on both sides of the connecting piece 311 of the blade side supporting shaft 31. Is limited to an angle of

  As described above, in the wiper blade 10, the gripping mechanism 30 is inclined to the opposite side with respect to the connecting mechanism 50 on the wiper arm 20 side when moving in the forward path G and when moving in the return path B. The Rukoto. Therefore, in the attachment means 16, the gripping mechanism 30 swings with respect to the coupling mechanism 50, so that the entire blade rubber 11 (axis viewed in the height direction of the blade rubber 11) is inclined with respect to the wiping surface S. Since the direction of the inclination is reversed when the gripping mechanism 30 shifts from the forward path G to the backward path B or from the backward path B to the forward path G, the blade rubber is used to reverse the direction of the elastic deformation (deflection deformation). 11, that is, inversion of the blade rubber 11 is promoted.

  Therefore, in the wiper blade 10 of the present embodiment, the blade rubber 11 can be smoothly reversed when moving from the forward path G to the backward path B or from the backward path B to the forward path G. For this reason, the wiper blade 10 can wipe the wiping surface S appropriately. This is because, in the wiper blade, if the blade rubber is not smoothly reversed when the round-trip path is turned back, abnormal noise due to chattering occurs or wiping unevenness occurs on the wiping surface S.

  Further, since the wiper blade 10 is configured as a so-called flat wiper blade, it is possible to prevent the wiping surface S from being appropriately wiped due to adhesion of ice and snow. . This is because, for example, the vertebra is rotatably held at both ends of the four yokes, each yoke is rotatably held at both ends of the two secondary levers, and both the secondary levers are the primary levers. A so-called tournament-type wiper blade which is configured to have a plurality of hierarchical structures with a wiper arm attached to a clip base and a clip which are rotatably held at both ends of the primary lever, and a clip. Then, when ice / snow adheres to the rotation locations connecting the layers and the rotation becomes impossible, the wiping surface S may not be properly wiped.

  Further, in the wiper blade 10 of the present embodiment, the attachment means 16 includes a coupling mechanism 50 coupled to the wiper arm 20 and a gripping mechanism 30 secured to the vertebra 12 in order to swing around the longitudinal direction. The connecting pieces 311 and 511 protruding from the respective support shafts 31 and 51 are connected to each other by the connecting pin 40, and by the oscillation around the longitudinal direction and the bending deformation of the blade rubber 11. In addition, since the blade rubber 11 is smoothly reversed when the round trip is turned back, it is easy to set the angle when swinging and suppresses the reduction in wiping performance even when used for a long period of time. can do.

  The easy setting of the angle at the time of swinging means that the angle of the inclined surface 312b provided on the base surface 312 of the blade side support shaft 31 and the shape of the end surface 511b of the connecting piece 511 of the arm side support shaft 51 to be in contact therewith. This is because the inclination angle of the entire blade rubber 11 (the axis viewed in the height direction of the blade rubber 11) with respect to the wiping surface S can be set by adjusting. In this embodiment, the inclination angle is set such that the end surface 511b of one connecting piece 511 is in contact with an inclined surface 312b provided on the other base surface 312 at an appropriate angular position with reference to the arm-side support shaft 51. What is necessary is just to set so that it may be latched by. On the other hand, in the tournament-type wiper blade, the play provided at each connection location by the pivot support between a plurality of levels is used, but the play at each connection location is Since it is not provided for swinging in the longitudinal direction, there is a risk that the amount of play at each connection location may change due to repeated swinging.

  Further, in the wiper blade 10, the gripping mechanism 30 attached to the vertebra 12 by the attaching means 16 is configured to be fixed while sandwiching the vertebra 12 between the opposing wall portions 36 by bending a single plate member. The mounting can be made easy.

  Further, in the wiper blade 10, since the gripping mechanism 30 and the coupling mechanism 50 are arranged in the direction along the wiping surface S in the attachment means 16, the height of the attachment means 16 (that is, the wiper blade 10). A dimension (namely, size dimension to the direction orthogonal to the wiping surface S) can be made small. For this reason, the resistance of the wind at the time of reciprocating on the wiping surface S can be suppressed, the power of the wiper arm 20 can be suppressed, and the wiping performance can be improved.

  In addition, connecting pieces 311 and 511 are provided at the ends of the pair of support shafts 31 and 51 provided in the gripping mechanism 30 and the connecting mechanism 50, respectively, and the end surface 511b of one connecting piece 511 projects from the other connecting piece 311. Since the rocking may be limited to a predetermined angle or less by contacting the surface 312, the rocking angle can be set to a predetermined value with a simple configuration that is easy to mold.

  Next, a wiper blade 10 of an example different from the above embodiment will be described. Since the basic configuration is the same as that of the above-described embodiment, the same functional parts are denoted by the same reference numerals as those of the above-described embodiment, and detailed description thereof is omitted.

  In the description of the first embodiment, as shown in FIG. 7, the entire blade rubber 11 (the axis viewed in the height direction of the blade rubber 11) is wiped by the gripping mechanism 30 swinging with respect to the coupling mechanism 50. In order to explain the relationship between the blade side support shaft 131 and the arm side support shaft 151 when inclined with respect to S, a detailed perspective view thereof is shown in FIG.

  As with the blade side support shaft 31 described in the above embodiment, the blade side support shaft 131 has a connecting piece 1311 and a base surface 1312 for projecting it on one end side of the shaft portion 1313. A flange 1314 is formed. Since the base surface 1312 is formed in a plane orthogonal to the axial direction of the shaft portion 1313, the connecting piece 1311 has a rectangular shape extending in the vertical direction and having the same length as the diameter of the circular plane on the arm side support shaft 151 side. It has a rectangular shape in side view as projected.

  Similarly to the arm side support shaft 51 described in the above embodiment, the arm side support shaft 151 also has a pair of connecting pieces 1511 protruding from the base surface 1512 on one end side of the shaft portion 1513. A flange portion 1514 having the base surface 1512 as one surface is formed. The base surface 1512 is formed on a plane orthogonal to the axial direction of the shaft portion 1513. On the other hand, the end surface 1511b of the connecting piece 1511 is formed in a circumferential surface shape.

  When the connecting piece 1311 of the blade side support shaft 131 swings about the connecting pin 40 and tilts to a predetermined angle, the end surface 1311b of the connecting piece 1311 contacts the base surface 1512 between the connecting pieces 1511 of the arm side support shaft 151. The slope beyond that is set to a limited length. At this time, the end surface 1511b of the connecting piece 1511 of the arm side support shaft 151 is formed in a circumferential surface shape with its corners being dropped, so that it does not contact the base surface 1312 of the blade side support shaft 131.

  That is, in the configuration shown in the first embodiment, the shape of the end surface 1311b of the connecting piece 1311, the length extending from the coupling pin 40 in the direction of the arm side support shaft 151, and the shape of the base surface 1512 of the arm side support shaft 151 are adjusted. Thus, the angle at which the gripping mechanism 30 swings can be easily limited to a predetermined angle or less.

  Next, a wiper blade 10 of an example different from the embodiment and Example 1 will be described. Since the basic configuration is the same as that of the above-described embodiment, the same functional parts are denoted by the same reference numerals as those of the above-described embodiment, and detailed description thereof is omitted.

  In the description of the second embodiment, as shown in FIG. 7, the entire blade rubber 11 (the axis viewed in the height direction of the blade rubber 11) is wiped by the gripping mechanism 30 swinging with respect to the coupling mechanism 50. In order to explain the relationship between the blade side support shaft 231 and the arm side support shaft 251 when inclined with respect to S, a detailed perspective view thereof is shown in FIG.

  As with the blade side support shaft 31 described in the above embodiment, the blade side support shaft 231 has a connecting piece 2311 and a base surface 2312 from which it protrudes on one end side of the shaft portion 2313. A flange 2314 is formed. Since the base surface 2312 is formed in a plane orthogonal to the axial direction of the shaft portion 2313, the connecting piece 2311 has a rectangular shape with the same length as the diameter of the circular plane extending in the vertical direction on the arm side support shaft 251 side. It has a rectangular shape in side view as projected.

  Similarly to the arm side support shaft 51 described in the above embodiment, the arm side support shaft 251 also has a pair of connecting pieces 2511 protruding from the base surface 2512 on one end side of the shaft portion 2513. A flange portion 2514 having the base surface 2512 as one surface is formed. The base surface 2512 is formed on a plane orthogonal to the axial direction of the shaft portion 2513. On the other hand, the end surface 2511b of the connecting piece 2511 is formed in an isosceles triangle shape in a side view in which a ridge line is formed in the approximate center of the swinging direction.

  When the connecting piece 2311 of the blade side support shaft 231 swings around the coupling pin 40 and tilts to a predetermined angle, the end surface 2311b of the connecting piece 2311 is the base surface between the connecting pieces 2511 of the arm side support shaft 251. It is formed in a length that does not contact 2512.

  On the other hand, when the blade side support shaft 231 swings and tilts to a predetermined angle, the end surface 2511b of the connecting piece 2511 of the arm side support shaft 251 contacts the base surface 2312, and the inclination beyond that is limited.

  That is, in the configuration shown in the second embodiment, by adjusting the inclination angle of the end surface 2511b of the connecting piece 2511 and the shape of the base surface 2312 of the blade-side support shaft 231, the angle at which the gripping mechanism 30 easily swings is adjusted. The angle can be limited to a predetermined angle or less.

  In the above-described embodiment, the vertebra 12 is sandwiched by widening the interval between the opposing wall portions 36 that form a pair of the gripping mechanism 30 of the mounting means 16, but the gripping mechanism 30 is attached to the vertebra 12. It is only necessary to be able to do so, and the present invention is not limited to the above-described form.

  Further, in the above-described embodiment, the vertebra 12 as the spring plate member is exemplified, but the spring plate member is curved in the longitudinal direction so as to disperse the force when the center portion is pushed down and flattened. If so, for example, it may be embedded in the head of the blade rubber along the longitudinal direction, and is not limited to the above-described form.

  In the above-described embodiment, the scene (winter) in which ice and snow may be attached has been described. However, in the case of a flat wiper blade, specifications corresponding to the summer (for example, change in blade rubber material) It may be a thing and is not limited to the above-mentioned form.

  Furthermore, in the above-described embodiment, the wiping surface S is configured by the windshield of the vehicle C, but it may be a rear glass and is not limited to the above-described mode.

  In the embodiment and each example described above, the swing is limited to a predetermined angle or less by setting the shape of the end portions of the pair of support shafts. However, the present invention is not limited to this. Instead, the swing angle may be limited by the gripping mechanism 30 coming into contact with the coupling mechanism 50 during swinging.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view showing a mounting means disassembled for each component in order to explain the configuration and mounting method of a wiper blade mounting means according to the present invention. 1 is a schematic perspective view showing a vehicle to which a wiper blade according to the present invention is applied. It is a typical perspective view which shows the wiper blade which concerns on this invention. FIG. 3 is an exploded perspective view showing the wiper blade according to the present invention in an exploded manner. It is sectional drawing obtained along the II line | wire shown in FIG. It is drawing for demonstrating a mode that the attachment means was mounted | worn with a vertebra by pinching | interposing a vertebra, and is sectional drawing obtained along the III-III line | wire shown in FIG. FIG. 4 is a view for explaining blade rubber operation in a return path, and is a cross-sectional view obtained along the line II-II shown in FIG. 3. It is a perspective view explaining the structure of the periphery which connected the braid | blade side spindle and the arm side spindle with the coupling pin. It is drawing for demonstrating the blade rubber operation | movement in an outward path, and is sectional drawing obtained along the II-II line | wire shown in FIG. It is a perspective view explaining the structure of the periphery which connected the braid | blade side spindle and arm side spindle of Example 1 with the coupling pin. It is a perspective view explaining the structure of the periphery which connected the braid | blade side spindle and arm side spindle of Example 2 with the coupling pin.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Wiper blade 11 Blade rubber 11a Wiping part 11b Head 12 Vertibra 16 (as a spring board member) Mounting means 20 Wiper arm 30 Grip mechanism 31 Blade side spindle (support axis)
311 Connection piece 311a Hole 311b End surface 312 Base surface 312a Ridge line 312b Slope 40 Connection pin 50 Connection mechanism 51 Arm side support shaft (support shaft)
511 Connection piece 511a Hole 511b End surface 512 Base surface 131,231 Blade side support shaft (support shaft)
1311, 2311 Connecting pieces 1311b, 2311b End surfaces 1312, 2312 Base surfaces 151, 251 Arm side support shaft (support shaft)
1511, 2511 Connecting pieces 1511b, 2511b End faces 1512, 2512 Base surface C Vehicle S Wiping surface

Claims (5)

A blade rubber having a long shape for wiping the wiping surface of the vehicle and having a wiping portion provided in the lower portion and a head portion provided in the upper portion so as to slide the wiping surface as seen in a cross section perpendicular to the longitudinal direction; A spring plate member that has a long shape that fits the head portion of the blade rubber, is concavely bent in the long direction when viewed from the blade rubber side, and is provided along the head portion; and An attachment means for holding the spring plate member at a substantially central portion and capable of being connected to a wiper arm provided on the vehicle, and on the wiping surface in a direction crossing the longitudinal direction by the operation of the wiper arm. A wiper blade reciprocally moved,
The attachment means includes a gripping mechanism fixed to a substantially central portion of the spring plate member, and a connecting mechanism for connecting the gripping mechanism and the wiper arm.
The gripping mechanism is provided with a first support shaft that extends in a direction perpendicular to the longitudinal direction and has an end projecting toward the connection mechanism, and also extends in the same direction in the connection mechanism. A second support shaft having an end protruding on the gripping mechanism side, and the pair of support shafts have the protruding end so that the gripping mechanism can swing around the longitudinal direction. A wiper blade characterized by being connected to each other by a connecting pin.   At the end portions of the pair of support shafts, connecting pieces each provided with a hole through which the coupling pin is inserted are provided, and the end surface of one connecting piece comes into contact with the base surface from which the other connecting piece projects. The wiper blade according to claim 1, wherein the swing is limited to a predetermined angle or less.   On one of the base surfaces, a ridge line is formed at substantially the center in the swing direction, and an end surface of the connecting piece to be in contact with the base surface is formed in a shape orthogonal to the axial direction of the support shaft. The wiper blade according to claim 2.   The end face of one of the connecting pieces is formed in a circumferential surface shape, and the other connecting piece is formed in a shape that comes into contact with the opposing base surface when the swing reaches a predetermined angle. The wiper blade according to claim 2, wherein On one end face of the connecting piece, a ridge line is formed at substantially the center in the swinging direction, and the base face to be in contact with the end face is formed in a shape orthogonal to the axial direction of the support shaft. The wiper blade according to claim 2, wherein

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