JP2006123709A - Wiper blade - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wiper blade which can prevent the inclination of the attitude of the base of blade rubber, and which can appropriately maintain the contact angle of the wiping part to a wiping surface. <P>SOLUTION: The blade rubber 14 has the base 28 and the wiping part 29. The base 28 is retained by a retaining part provided to the end of a lever in the longitudinal direction so that the blade rubber can be attached or detached. Then the wiping part 29 has contact with the wiping surface 26, and performs round trip wiping of the surface 26 by tilting and reversing to the base 28. A backing 15 is engaged with a groove 28b for the backing formed along the base 28 in the longitudinal direction. Then a cover member 13 is attached to the lever, and controls toppling over of the base 28 against the attitude of the base 28 at the retaining part between the retaining part and the end of the lever 14 in the longitudinal direction. Then the cover member retains the attitude of the base 28 along the longitudinal direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

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

  Generally, a so-called tournament-type wiper blade having a lever assembly in which a plurality of levers are rotatably connected to each other to follow the curvature of a wiping surface is known as a wiper blade of a vehicle wiper device.

In such a tournament type wiper blade, the height of the wiper blade is increased to connect a plurality of levers in a tournament shape, and resistance and wind noise are generated by the driving wind, or the driver's view is obstructed. There was a problem. Therefore, in order to prevent this, as in Patent Document 1, a backing as a spring member formed in a predetermined curved shape is attached to a blade rubber that contacts and wipes the wiping surface, and the wiper arm is connected. There is a so-called leverless blade in which the holder is directly fixed to the backing and the lever is abolished. This wiper blade directly applies a pressing force from the wiper arm to the backing, and follows the curvature of the wiping surface by the spring property of the backing.
JP-T-2001-50479 JP 49-92726 A

  By the way, in the tournament-type wiper blade described above, the blade rubber is partially held in the longitudinal direction by the holding claws provided at the end of the lower lever among the plurality of levers connected in a tournament shape. . In addition, the blade rubber is a mode in which the holding claw is inserted into the holding groove formed in the base portion thereof, and the lever assembly and the blade rubber having the backing assembled in the backing groove can be exchanged, in other words, detachably assembled. Therefore, the retaining claws are loosely fitted to some extent. In other words, the base of the blade rubber held by the holding claws is tilted by this amount of play, and this affects the posture of the wiping unit, and an appropriate contact angle of the wiping unit with respect to the wiping surface is obtained. There is a risk of being lost. In particular, there is nothing that maintains the posture of the base portion of the blade rubber between adjacent holding claws, and the above-mentioned concern is further increased.

  On the other hand, also in the wiper blade of Patent Document 1, the posture of the base portion of the blade rubber depends on the backing and the rigidity of the blade rubber itself from the holder to the end portion in the longitudinal direction. For this reason, the wiper blade is twisted toward the tip (due to a friction load with the wiping surface of the blade rubber), and the change in the inclination of the wiping portion accompanying the inclination of the posture of the base portion of the blade rubber is also the wiping surface. There is a risk that maintaining an appropriate contact angle of the wiping portion with respect to will be impaired.

  Further, as shown in Patent Document 2, there is a long support structure to which a wiper arm is connected, in which a blade rubber is held in a rail-like continuous groove extending over the entire length of the blade rubber in a replaceable manner. . However, even in this wiper blade, the rail-like continuous groove and the base portion of the blade rubber are loosely fitted to some extent, and still have the above-mentioned problems associated with the inclination of the posture of the base portion of the blade rubber.

  An object of the present invention is to provide a wiper blade capable of preventing the inclination of the posture of the base portion of the blade rubber and appropriately maintaining the contact angle of the wiping portion with respect to the wiping surface.

  In order to solve the above-mentioned problem, the invention according to claim 1 is characterized in that a wiper arm is rotatably connected around a connecting shaft, and a plurality of the levers are rotatably connected to the first lever. A lever assembly having a lever; a base portion detachably held by a holding portion provided at a longitudinal end portion of the lever lower than the lever assembly; and a wiping surface that is in contact with the wiping surface and tilted and inverted with respect to the base portion. A wiper blade having a wiping portion for reciprocally wiping the wiping surface, and attached to the lever assembly, between the adjacent holding portions or between the holding portion and a longitudinal end portion of the blade rubber. The base posture of the holding portion is prevented from falling with respect to the posture of the base portion, and the base posture is maintained along the longitudinal direction. And summarized in that comprises means.

  According to a second aspect of the present invention, in the wiper blade according to the first aspect, the base posture holding means is between the adjacent holding parts or between the holding part and the longitudinal end of the blade rubber. The base portion has a wall portion that surrounds the base portion, and the gist of the base portion posture holding means is to prevent the base portion from collapsing when the inner wall surface of the wall portion abuts against the base portion.

  According to a third aspect of the present invention, in the wiper blade according to the first aspect, the base posture holding means is between the adjacent holding portions or between the holding portion and the longitudinal end portion of the blade rubber. It has a plurality of protrusions arranged at intervals in the longitudinal direction, and the gist of the base posture holding means is to prevent the base from collapsing when the plurality of protrusions abut against the base. .

  According to a fourth aspect of the present invention, there is provided one lever member or holder member to which a wiper arm is rotatably connected around a connecting shaft, and a holding portion or the holder member provided at a longitudinal end portion of the lever member. A blade rubber having a base portion that is detachably held by a provided holding portion, a wiping portion that comes into contact with the wiping surface and is tilted and reversed with respect to the base portion to reciprocately wipe the wiping surface; and a longitudinal direction on the base portion And a backing made of a spring material that is inserted into a backing groove formed along the center and has a central portion that is curved in a convex shape toward the anti-wiping surface, and the longitudinal direction of the holding portion and the blade rubber A wiper blade having a followable end portion freely deformable following the curved shape of the wiping surface between both end portions, attached to the lever member or the holder member, Base posture holding means for preventing the base from falling down with respect to the posture of the base in the holding portion and holding the posture of the base along the longitudinal direction between the holding portion and the longitudinal end of the blade rubber. The main point is that

  The invention according to claim 5 is the wiper blade according to claim 4, wherein the wiper blade is fixed to the lever member or the holder member, and has an accommodating portion that accommodates the base portion in the longitudinal direction. The base posture holding means is formed by the cover member, and the gist of the invention is to prevent the base from falling down by the inner wall surface forming the housing portion coming into contact with the base. .

  The invention according to claim 6 is the wiper blade according to claim 5, wherein the wiper blade is fixed to the housing portion between the holding portion and a longitudinal end portion of the blade rubber, and holds the base portion detachably. A holding member, wherein the base posture holding means is between the holding part and the holding member, or between the holding part and the holding member, or in the longitudinal direction of the holding member and the blade rubber. The gist of the invention is to prevent the base wall from collapsing when the inner wall surface forming the housing portion abuts against the base portion with the end portion.

  The invention according to claim 7 is the wiper blade according to claim 5 or 6, wherein the cover member receives a traveling wind on an inclined surface inclined with respect to the wiping surface and applies a pressing force in the wiping surface direction. The gist is that a fin portion to be generated is provided.

(Function)
According to the invention described in claim 1 or 2, the base portion of the blade rubber is detachably held by the holding portion provided at the longitudinal end portion of the lower lever of the lever assembly. And the wiping part of the said blade rubber inclines and reverses with respect to the said base, and wipes the said wiping surface reciprocatingly. At this time, the base portion of the blade rubber at the portion held by the holding portion maintains a predetermined posture. On the other hand, in a portion not held by the holding portion (between adjacent holding portions or between the holding portion and the longitudinal end of the blade rubber), the base posture holding means causes the holding portion to The base is prevented from being tilted with respect to the posture of the base, and the posture of the base is held along the longitudinal direction. Therefore, it is possible to prevent the contact angle of the wiping portion with respect to the wiping surface from changing from an appropriate state over the longitudinal direction of the blade rubber.

  According to invention of Claim 3, in addition to the effect of Claim 1, there exist the following effects. That is, the plurality of protrusions that prevent the base from falling by abutting against the base are arranged in the longitudinal direction between the adjacent holding parts or between the holding part and the longitudinal end of the blade rubber. Arranged at intervals. Therefore, for example, when the base portion of the blade rubber is moved in the longitudinal direction with respect to the lever assembly (lower lever) to which the base posture holding means is attached, the base portion is held in the holding portion. In this projection part, the base part posture holding means is partially abutted. For this reason, when the lever assembly and the blade rubber are assembled, a frictional force generated between the base and the base posture holding means is reduced, and the assemblability can be improved.

  According to the fourth aspect of the present invention, the base portion of the blade rubber is detachably held by the holding portion provided at the end portion in the longitudinal direction of the lever member or the holding portion provided on the holder member. And the wiping part of the said blade rubber inclines and reverses with respect to the said base, and wipes the said wiping surface reciprocatingly. At this time, the base portion of the blade rubber at the portion held by the holding portion maintains a predetermined posture. On the other hand, in a portion that is not held by the holding portion (between the holding portion and the longitudinal end portion of the blade rubber), the base posture holding means causes the base portion to be in the posture of the holding portion. The base is prevented from falling, and the posture of the base is held along the longitudinal direction. Therefore, it is possible to prevent the contact angle of the wiping portion with respect to the wiping surface from changing from an appropriate state over the longitudinal direction of the blade rubber.

  According to the invention described in claim 5, since the base portion of the blade rubber in which the backing groove is formed is accommodated in the accommodating portion of the cover member over the longitudinal direction, for example, a cover member having no accommodating portion. Compared with the case where is fixed to the lever member or the holder member, the height direction dimension of the wiper blade from the wiping surface can be made lower. Further, the wiper blade has a sense of unity as a whole by the cover member, and the appearance design can be improved.

  Further, the base posture holding means can be formed by the cover member without adding any parts. And the said cover member as said base attitude | position holding means suppresses the fall of this base part because the inner wall face which forms the said accommodating part contact | abuts to the said base part.

  According to the invention described in claim 6, since the base portion of the blade rubber is detachably held by the holding member fixed to the housing portion in addition to the holding portion, particularly the end portion of the backing is the It is possible to prevent the side groove from protruding from the backing groove. The base posture holding means is provided between the holding part and the holding member, or between the holding part and the holding member, or between the holding member and the blade rubber in the longitudinal direction. In the meantime, the inner wall surface forming the accommodating portion abuts against the base portion, thereby preventing the base portion from falling down.

  According to the invention of claim 7, the cover member receives the traveling wind on the inclined surface of the fin portion and generates a pressing force in the wiping surface direction so that the following end portion is in the wiping surface direction. Press to. That is, the follow-up end portion can follow the curved shape of the wiping surface more appropriately by being pressed directly by the pressing force.

  As described above in detail, in the inventions according to claims 1 to 7, the inclination of the posture of the base portion of the blade rubber can be prevented, and the contact angle of the wiping portion with respect to the wiping surface can be properly maintained.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
FIGS. 1A and 1B are a plan view and a front view of the wiper blade 11, respectively. In addition, in FIG.1 (b), some longitudinal cross-sections are shown in figure. As shown in the figure, the wiper blade 11 includes a lever 12 as a lever member, a cover member 13 forming a base posture holding means fixed to the lever 12, and a blade held by the lever 12 and the cover member 13. A rubber 14 and a backing 15 fitted into the blade rubber 14 are provided.

  The tip of the wiper arm 16 is rotatably connected to the lever 12 of the wiper blade 11 around the connecting shaft 17, and the wiper blade 11 is biased toward the wiping surface by the wiper arm 16. Yes. The wiper arm 16 is fixed to a pivot shaft (not shown) whose base end is reciprocatingly rotated by a drive source (not shown) of the wiper device, and the wiper arm 16 is reciprocally rotated together with the pivot shaft, thereby wiping by the wiper blade 11. The surface is wiped away.

  The lever 12 includes a holder portion 21 provided with the connecting shaft 17, an arm portion 22 formed extending from the holder portion 21 toward both sides in the longitudinal direction of the blade rubber 14, and a tip portion of the arm portion 22 ( The holding portion 23 formed at the longitudinal end of the lever 12 is integrally provided.

  As shown in the cross-sectional view along the line AA in FIG. 2, the holding portion 23 is formed in a substantially U-shaped cross section, and has a width direction (the left-right direction in FIG. A holding claw 23a bent at a substantially right angle is formed on the inner side opposite to (2). The lever 12 holds the blade rubber 14 together with the backing 15 by engaging a holding claw 23 a of the holding portion 23 with a base 28 described later of the blade rubber 14.

  As shown in FIG. 1, the cover member 13 has a length slightly longer than the blade rubber 14 in the longitudinal direction, and is equivalent to or an elastic material such as a rubber material or an elastomer material, preferably a blade rubber. It is made of an elastic material having the following elasticity (more flexible). This cover member 13 is fixed to the lever 12 in such a manner that it surrounds the lever 12 and the blade wiper 14 on the anti-wiping surface side (the upper side in FIG. 1B).

  More specifically, a housing hole 13a in which the holder portion 21 of the lever 12 is inserted and accommodated is formed in the central portion of the cover member 13 in the longitudinal direction. The cover member 13 has a first receiving groove 13b that is recessed from the receiving hole 13a in a substantially U-shaped cross section corresponding to the outer shape of each of the arm portion 22 and the holding portion 23, and a first receiving portion. Continuing from the groove 13b, the blade housing 14 is formed with a second housing groove 13c serving as a housing portion that is recessed in a substantially U-shaped cross section (the range L shown in FIG. 1B) up to the longitudinal tip portion. ing. The cover member 13 is fixed to the lever 12 by the first accommodation groove 13b being joined to the arm portion 22 with an adhesive, for example, in a state where the holder portion 21 is inserted and accommodated in the accommodation hole 13a.

  Here, as shown in a cross-sectional view along the line BB in FIG. 1B in FIG. 3, the inner wall surface of the second receiving groove 13 c is inclined corresponding to the outer shape of the base portion 28 of the blade rubber 14. It has an inclined surface 13d. The inclined surface 13d is formed in such a manner that both corners of the inner wall surface having a substantially U-shaped cross section of the second receiving groove 13c are slanted. When the center line of the blade rubber 14 orthogonal to the wiping surface 26 when the blade rubber 14 is held on the wiping surface 26 is represented by a center line O1, the extension lines E1 and E2 of these inclined surfaces 13d are the center line O1. It is formed symmetrically so as to cross over. These inclined surfaces 13d abut against the base portion 28 of the blade rubber 14 in a manner described later, thereby preventing the tilting.

  As shown in FIG. 1B, a plurality of grippers 24 as holding members (here, three on each side in the longitudinal direction) are fixed to the cover member 13 at intervals in the longitudinal direction. These grippers 24 are disposed between the holding portion 23 of the lever 12 and both end portions of the blade rubber 14 (range L). Since the shape of the gripper 24 is substantially the same as that of the holding portion 23, what is replaced with the reference numeral in parentheses in FIG. 2 will be described as a cross-sectional view taken along the line CC in FIG. The second receiving groove 13c is recessed by a predetermined depth from the inner wall surface in accordance with the arrangement of the gripper 24. The gripper 24 is joined and fixed to the recessed second receiving groove 13c with, for example, an adhesive.

  The gripper 24 is formed in a substantially U-shaped cross section, and a holding claw 24a bent at a substantially right angle is formed on the inner end thereof facing the width direction (left-right direction in FIG. 2). The cover member 13 holds the blade rubber 14 together with the backing 15 by engaging the holding claws 24 a of the gripper 24 with the base portion 28 of the blade rubber 14.

  As shown in FIGS. 1 to 3, the cover member 13 has the first and second receiving grooves 13 b and 13 c on the wiping surface side, and a fin having a substantially triangular cross section on the anti-wiping surface side. Part 25. The fin portion 25 forms an acute angle θ with respect to the wiping surface 26 (see FIG. 3) so as to generate a pressing force in the wiping surface direction by receiving the traveling wind of the vehicle to prevent the wiper blade 11 from lifting. It has a concave inclined surface 25a.

  In addition, as shown in FIG.1 (b), the stopper wall 25b which protrudes in the wiping surface side continuously from the inner wall surface of the said 2nd accommodation groove 13c is formed in the longitudinal direction front-end | tip part of the fin part 25. As shown in FIG. . The stopper wall 25b regulates the movement in the longitudinal direction when the held blade rubber 14 comes into contact therewith.

  As shown in FIGS. 2 and 3, the blade rubber 14 attached to the lever 12 (holding portion 23) and the cover member 13 (gripper 24) is made of a rubber material and is connected to the base portion 28 and the neck portion 14a via the base portion 28. The wiping portion 29 is formed into a long shape. The blade rubber 14 is held by the lever 12 and the cover member 13 (gripper 24) at the base portion 28.

  The base 28 is formed with a backing groove 28b and a holding groove 28c that are recessed in the width direction (the left-right direction in FIG. 3) facing each outer surface 28a. The backing groove 28 b and the holding groove 28 c are formed so as to extend along the longitudinal direction of the blade rubber 14. Therefore, the cross section of the base portion 28 has a shape constricted in two places at the top and bottom. The backing groove 28b is disposed on the lever 12 (and cover member 13) side (upper side in FIG. 3) with respect to the holding groove 28c in the height direction.

  The backing groove 28b is for inserting the backing 15 therein. In addition, as shown in FIG. 4, the longitudinal direction end part of the groove | channel 28b for backing forms the regulation surface 28d for regulating the movement of the backing 15 inserted from the width direction in the longitudinal direction.

  As shown in FIG. 2, the holding groove 28c is arranged so that the holding claw 23a of the lever 12 (holding portion 23) and the holding claw 24a of the gripper 24 are inserted. That is, if the width between the outer side surfaces 28a of the base portion 28 is the width dimension W1, the width dimension W2 between the opposite ends of the holding claws 23a of the lever 12 and the width dimension W3 between the opposite ends of the holding claws 24a of the gripper 24. Is set to be smaller than this width dimension W1. The holding claws 23a and 24a are formed at positions corresponding to the holding grooves 28c in the height direction. The blade rubber 14 is held by the lever 12 and the cover member 13 (gripper 24) by holding claws 23a and 24a inserted into the holding groove 28c. At this time, the second accommodation groove 13c of the cover member 13 accommodates the base 28 of the blade rubber 14 in the longitudinal direction.

  Here, the base portion 28 is an inclined surface 28f formed by obliquely chamfering both corners formed by the outer side surfaces 28a and the end surface 28e on the side opposite to the wiping surface (upper side in FIG. 3) in the entire longitudinal direction. have. Both inclined surfaces 28f are formed such that these extension lines E1 and E2 intersect on the center line O1. Both inclined surfaces 13d of the cover member 13 are set to abut against these inclined surfaces 28f in a state where the blade rubber 14 is held. The cover member 13 prevents the base portion 28 from falling when the inclined surface 13d contacts the inclined surface 28f.

  Strictly speaking, in the range (range L) where the second receiving groove 13c is formed, the cover member 13 has the inclined surface 13d as the inclined surface 28f except the range where the gripper 24 is disposed. It is in contact. That is, as shown in FIG. 1B, the cover member 13 includes a gripper adjacent to the holding portion 23 between the holding portion 23 and the longitudinal end portion of the blade rubber 14 (range L). 24 (range L1), between the adjacent grippers 24 (range L2, L3) and between the gripper 24 and the longitudinal end of the blade rubber 14 (range L4), the inclined surface 13d is inclined surface 28f. Abut.

  The wiping portion 29 of the blade rubber 14 has a substantially triangular cross section, and is connected to the base portion 28 by a neck portion 14a so as to be tilted and reversible. The blade rubber 14 comes into contact with the wiping surface 26 at the wiping portion 29 and is tilted and reversed with respect to the base portion 28 to wipe the wiping surface 26 in a reciprocating manner.

  The backing 15 is made of a metal material (spring material) having a spring property and is formed in an elongated plate shape. Further, the backing 15 has a curvature smaller than the curvature of the wiping surface 26 in a natural state (no load state) (a curvature radius smaller than the curvature radius of the wiping surface 26), and the longitudinal center portion is on the anti-wiping surface side. It is formed in a curved shape that is convex toward the surface. The backing 15 is fitted into each backing groove 28b so as to be completely accommodated. Note that the outer surface 28a and the end surface 28e of the base portion 28 are surrounded by the cover member 13 in the longitudinal direction, so that the backing 15 fitted in the backing groove 28b is prevented from falling off.

  When the backing 15 is fitted into the backing groove 28b, the wiper blade 11 is curved and deformed in accordance with the shape of the backing 15. Further, since the backing 15 has a predetermined rigidity and spring property, when a pressing force is applied by the wiper arm 16 at the time of wiping, particularly between the holding portion 23 and the longitudinal end portion of the blade rubber 14 (range L). The wiper blade 11 is elastically deformed in accordance with the curvature of the wiping surface 26. In the present embodiment, the holding portions 23 are respectively set at positions where the curvature change of the wiping surface 26 that changes with the wiping operation by the blade rubber 14 (wiping portion 29) is small.

  In the wiper blade 11, portions corresponding to the respective ranges L arranged on both sides in the longitudinal direction are particularly referred to as follow-up end portions 11a (see FIG. 1B). These follow-up end portions 11a can be freely deformed following the curved shape of the wiping surface 26, respectively. The gripper 24 is disposed corresponding to the following end 11a.

  Since the holding claws 23a and 24a are only inserted into the holding groove 28c, they do not restrict the sliding of the blade rubber 14 with respect to the lever 12 in the longitudinal direction. That is, the actual length of the blade rubber 14 located between the two holding portions 23 of the lever 12 changes the curved state by following the wiping surface 26, and the actual length between the two holding portions 23 also changes. Therefore, the amount of change in the actual length is absorbed by the sliding of the blade rubber 14 with respect to the lever 12 in the longitudinal direction. Therefore, the elastic follow-up of the blade rubber 14 accompanying the wiping operation is allowed by the sliding in the longitudinal direction.

  Next, the assembly mode of the wiper blade 11 will be described generally. As shown in FIG. 1B, the cover member 13 is joined to the arm portion 22 and fixed to the lever 12 in a state where the holder portion 21 is inserted and accommodated in the accommodation hole 13 a. At this time, the gripper 24 is joined to the second accommodation groove 13 c of the cover member 13. In this state, the holding claws 23 a of the lever 12 (holding portion 23) and the holding claws 24 a of the gripper 24 appear in the second housing groove 13 c of the cover member 13 so as to be able to engage with the blade rubber 14.

  On the other hand, the backing 15 is inserted into each backing groove 28b of the blade rubber 14 in advance. In this state, the blade rubber 14 is moved along the same direction from one end in the longitudinal direction of the cover member 13, and the holding claws 24 a and 23 a are sequentially inserted into the holding groove 28 c, and the blade rubber 14 is moved to the lever 12. Move to the holding position. Thereby, the blade rubber 14 is held by the lever 12 and the cover member 13 (gripper 24). The holding claws 24a and 23a are inserted into the holding groove 28c of the blade rubber 14, so that the opening side (outside in the width direction) of the backing groove 28b is on the holding portion 23 of the lever 12, as shown in FIG. And partially blocked by the gripper 24. Accordingly, the backing 15 fitted in the backing groove 28 b is prevented from being detached by the holding portion 23 and the gripper 24.

  The blade rubber 14 held by the lever 12 and the cover member 13 (gripper 24) is moved in the opposite direction to the above, and the holding claws 24a and 23a are sequentially extracted from the holding groove 28c, so that the lever 12 and the cover member are removed. Needless to say, it is removed from 13. That is, the blade rubber 14 (base portion 28) is detachably held by the holding portion 23 and the gripper 24.

As described above in detail, according to the present embodiment, the following effects can be obtained.
(1) In the present embodiment, the base portion 28 of the blade rubber 14 is detachably held by the holding portion 23 provided at the longitudinal end portion of the lever 12. The wiping portion 29 of the blade rubber 14 is tilted and reversed with respect to the base portion 28 to wipe the wiping surface 26 in a reciprocating manner. At this time, the base portion 28 of the blade rubber 14 at the portion (holding position) held by the holding portion 23 maintains a predetermined posture. On the other hand, a portion not held by the holding portion 23 (between the holding portion 23 and the end portion in the longitudinal direction of the blade rubber 14, more specifically between the holding portion 23 and the gripper 24, adjacent grippers 24). And between the gripper 24 and the longitudinal end of the blade rubber 14), the inclined surface 13 d of the cover member 13 comes into contact with the inclined surface 28 f so that the posture of the base portion 28 in the holding portion 23 is maintained. On the other hand, the base portion 28 is prevented from falling, and the posture of the base portion 28 is maintained along the longitudinal direction. The base portion 28 maintains its posture on the center line O1 so that the extension lines E1 and E2 of the two inclined surfaces 28f intersect on the center line O1 (so that they converge on the center line O1). That is, even if the wiping portion 29 is inclined due to a frictional load with the wiping surface 26, the base portion 28 is not dragged by the holding portion 23 and maintains its posture without being inclined. It is possible to prevent the contact angle of the wiping portion 29 with respect to the wiping surface 26 from changing from an appropriate state over the longitudinal direction of the blade rubber 14.

  (2) In the present embodiment, the base 28 of the blade rubber 14 in which the backing groove 28b is formed is accommodated in the second accommodation groove 13c of the cover member 13 over the longitudinal direction. Compared with a case where a cover member without a portion is fixed to the lever 12, the dimension in the height direction of the wiper blade 11 from the wiping surface 26 can be made lower. Further, the wiper blade 11 has a sense of unity as a whole by the cover member 13, and the appearance design can be improved.

Furthermore, a means for maintaining the posture of the base portion 28 can be formed by using the cover member 13 (second housing groove 13c) without adding any components.
(3) In the present embodiment, the base portion 28 of the blade rubber 14 is detachably held by the gripper 24 fixed to the second accommodation groove 13c in addition to the holding portion 23. It is possible to prevent the end portion from protruding laterally from the backing groove 28b.

  (4) In the present embodiment, the cover member 13 receives the traveling wind on the inclined surface 25a of the fin portion 25 to generate a pressing force in the wiping surface direction, so that the follow-up end portion 11a is moved to the wiping surface. Press in the direction. That is, the follow-up end portion 11a can follow the curved shape of the wiping surface 26 more appropriately by being directly pressed by the pressing force.

(Second Embodiment)
Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. The second embodiment is embodied in a tournament-type wiper blade, and the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is partially omitted.

  FIG. 5 is an exploded perspective view of the wiper blade 31 of the present embodiment. As shown in the figure, the wiper blade 31 includes a lever assembly 32, a base posture holding member 33 as a base posture holding means fixed to the lever assembly 32, a blade rubber 37 held by the lever assembly 32, and a blade. And a backing 38 fitted into the rubber 37. The lever assembly 32 is rotatable to the first lever 34 and both longitudinal ends of the first lever 34 (only one longitudinal end of the first lever 34 is shown in FIG. 5). The second lever 35 as a connected lever and the third lever 36 as a lever connected to both ends in the longitudinal direction of the second lever 35 so as to be rotatable are configured in a tournament shape. The tip of the wiper arm 16 (see FIG. 1) is connected to the first lever 34 so as to be rotatable around a connecting shaft 34a at the center in the longitudinal direction.

  The third lever 36 includes an arm portion 36a that extends from the center of rotation of the second lever 35 toward both longitudinal sides of the blade rubber 37, and a distal end portion of the arm portion 36a (the longitudinal length of the third lever 36). And a holding portion 36b formed at a direction end portion). The holding portion 36b is formed in a substantially U-shaped cross section in accordance with the holding portion 23 (see FIG. 2), and a similar holding claw 36c (see FIG. 7) is formed at the tip. Yes. The third lever 36 holds the blade rubber 37 together with the backing 38 by engaging the holding claw 36 c of the holding portion 36 b with the base 28 of the blade rubber 37. Of the plurality of levers (second and third levers 35 and 36) provided in the lever assembly 32, a lever (third lever 36) including a pair of holding portions 36b for holding the blade rubber 37 is used as a lower lever. That's it. Note that a pair of locking holes 36d for fixing the base posture holding member 33 is formed in both arm portions 36a of the third lever 36, respectively. As shown in the cross-sectional view and the perspective view in FIGS. 6 and 7, these locking holes 36 d are formed so as to penetrate the arm portion 36 a in the width direction.

  As shown in FIG. 5, the base posture holding member 33 has a length a2 that is slightly shorter than the distance a1 between the opposing surfaces of the holding portions 36b of the third lever 36 in the longitudinal direction. It is formed by. The base posture holding member 33 is fixed to the arm portion 36a of the third lever 36 (lever assembly 32) so as to surround the anti-wiping surface side (the upper side in FIG. 5) of the blade rubber 37.

  More specifically, the base posture holding member 33 has a wall portion 33a having a substantially U-shaped cross section, and both holding portions 36b of the third lever 36 are disposed on the end surface of the counter wiping surface. A pair of locking claws 33b projecting from the respective locking holes 36d in a state of being disposed therebetween are provided. The locking claws 33b are locked in the locking holes 36d of the arm portion 36a when the wall portion 33a of the base posture holding member 33 is disposed flush with the holding portion 36b in the longitudinal direction. Thereby, the base posture holding member 33 is fixed to the third lever 36.

  The inner wall surface 33c of the base posture holding member 33 has a rectangular shape having corners that are substantially orthogonal to the outer shape of the base 28 of the blade rubber 37 of the present embodiment. This inner wall surface 33c abuts against the base portion 28 of the blade rubber 37 in a manner to be described later, thereby preventing the inner wall 33c from falling.

  The blade rubber 37 attached to the lever assembly 32 (third lever 36) is made of a rubber material and is held by the third lever 36 at the base portion 28. The backing 38 is fitted into the backing groove 28b of the base portion 28 from the width direction.

  The holding groove 28c is arranged to insert the holding claw 36c of the holding portion 36b. The blade rubber 37 is held on the lever assembly 32 (third lever 36) by a holding claw 36c inserted into the holding groove 28c. At this time, the base posture holding member 33 (inner wall surface 33c) accommodates the base 28 of the blade rubber 37 in the longitudinal direction.

  Here, the base portion 28 of the present embodiment is formed such that both the outer side surfaces 28a and the end surface 28e on the counter wiping surface side (upper side in FIG. 6) are substantially orthogonal over the entire longitudinal direction. The inner wall surface 33c of the base posture holding member 33 is set so as to contact the outer surface 28a and the end surface 28e in a state where the blade rubber 37 is held. The base posture holding member 33 prevents the base portion 28 from falling when the inner wall surface 33c comes into contact with the outer surface 28a and the end surface 28e.

  The backing 38 is made of a metal material (spring material) having a spring property and is formed in an elongated plate shape. The backing 38 is fitted into each backing groove 28b so as to be completely accommodated. The blade rubber 37 is held with respect to the lever assembly 32 by holding the base portion 28 into which the backing 38 is fitted by the holding portions 36b (holding claws 36c).

  The base portion 28 is surrounded by the base posture holding member 33 in the longitudinal direction on the outer side surface 28a and the end surface 28e, thereby preventing the backing 38 fitted in the backing groove 28b from falling off. The backing 38 distributes the pressing force of the wiper arm 16 along with the lever assembly 32 in the longitudinal direction of the blade rubber 37, and makes the contact pressure of the blade rubber 37 with the wiping surface 26 uniform in the longitudinal direction of the blade rubber 37.

  Next, the assembly mode of the wiper blade 31 will be described generally. In a state where the base posture holding member 33 is attached to the third lever 36 (lever assembly 32), the holding claw 36c of the holding portion 36b appears so as to be able to engage with the blade rubber 37.

  On the other hand, a backing 38 is inserted in advance in each backing groove 28 b of the blade rubber 37. In this state, the blade rubber 37 is moved along the same direction from one longitudinal end of the lever assembly 32 (third lever 36), and the holding claws 36c of the holding portions 36b are sequentially inserted into the holding grooves 28c. The blade rubber 37 is moved to the holding position by the third lever 36. Thereby, the blade rubber 37 is held by the lever assembly 32. The holding claw 36 c is inserted into the holding groove 28 c of the blade rubber 37, so that the opening side (outside in the width direction) of the backing groove 28 b is partially blocked by the holding portions 36 b of the third lever 36. . Therefore, the backing 38 fitted in the backing groove 28b is prevented from being detached by these holding portions 36b.

  Needless to say, the blade rubber 37 held by the lever assembly 32 is moved in the opposite direction to that described above, and the holding claws 36c are sequentially removed from the holding grooves 28c. That is, the blade rubber 37 (base portion 28) is detachably held by the holding portion 36b.

As described above in detail, according to the present embodiment, the following effects can be obtained.
(1) In the present embodiment, the base portion 28 of the blade rubber 37 is detachably held by a holding portion 36b provided at a longitudinal end portion of a lower lever (third lever 36) of the lever assembly 32. . The wiping portion 29 of the blade rubber 37 is tilted and reversed with respect to the base portion 28 to wipe the wiping surface 26 back and forth. At this time, the base portion 28 of the blade rubber 37 in the portion (holding position) held by the holding portion 36b maintains a predetermined posture. On the other hand, in a portion that is not held by the holding portion 36b (between the holding portions 36b adjacent to each other in each third lever 36), the inner wall surface 33c of the base posture holding member 33 is formed on both outer side surfaces 28a and end surfaces 28e. By abutting, the tilting of the base portion 28 is suppressed with respect to the posture of the base portion 28 in the holding portion 36b, and the posture of the base portion 28 is held along the longitudinal direction. Therefore, it is possible to prevent the contact angle of the wiping portion 29 with respect to the wiping surface 26 from changing from an appropriate state over the longitudinal direction of the blade rubber 37.

In addition, you may change the said embodiment as follows.
-In the said 1st Embodiment, you may employ | adopt the cover member 41 and the blade rubber 42 of the shape shown in FIG. That is, the base portion 28 of the blade rubber 42 is formed such that both the outer side surfaces 28a and the end surface 28e on the side opposite to the wiping surface (upper side in FIG. 8) are substantially orthogonal over the entire longitudinal direction. On the other hand, the inner wall surface (second housing groove) 41 a of the cover member 41 has a rectangular shape having corner portions that are substantially orthogonal to the outer shape of the base portion 28 of the blade rubber 42. And between both the outer side surfaces 28a and between the opposing surfaces of the inner wall surface 41a have mutually equal width dimension W. The inner wall surface 41a prevents the base portion 28 from falling by contacting the outer surface 28a and the end surface 28e in a state where the blade rubber 42 is held.

  In addition, the inner wall surface 41a is not directly brought into contact with the outer surface 28a or the like, for example, a plurality of protrusions arranged on the same inner wall surface at intervals in the longitudinal direction are disposed, and the protrusions are interposed therebetween. May be brought into contact with the outer surface 28a or the like. In this case, for example, when the base portion 28 of the blade rubber 42 is moved in the longitudinal direction with respect to the lever 12 to which the cover member 41 is attached and the base portion 28 is held by the holding portion 23 or the like, the base portion 28 has a plurality of protrusions. This partly comes into contact with each other. For this reason, when the lever 12 to which the cover member 41 is attached and the blade rubber 42 are assembled, the frictional force generated between the base 28 and the cover member 41 is reduced, and the assemblability can be improved.

  In the first embodiment, the base posture holding means is formed using the cover member 13, but a member having the function may be added separately from the cover member 13. In this case, the cover member 13 may be omitted.

In the first embodiment, the cover member 13 may be fixed to the lever 12 and the gripper 24 by insert molding, for example.
-In the said 1st Embodiment, you may employ | adopt the cover member without the fin part 25. FIG.

  In the first embodiment, instead of the lever 12, a wiper blade having a holder member that holds the central portion in the longitudinal direction of the blade rubber 14 (base portion 28) at the holding portion may be adopted. A wiper arm 16 is connected to the holder member so as to be rotatable around a connecting shaft. Even with this wiper blade, the same effect can be obtained by attaching (fixing) a similar cover member that forms the base posture holding means to the holder member.

  In the second embodiment, the base posture holding member 40 having the shape shown in FIG. 9 may be employed instead of the base posture holding member 33. That is, on the inner wall surface of the base posture holding member 40, a plurality of protrusions 40a arranged at intervals in the longitudinal direction are arranged. These protrusions 40a are provided so as to protrude inward in the width direction. The base posture holding member 40 is set so as to come into contact with the outer surface 28a of the base portion 28 through these protrusions 40a. In this case, for example, when the base portion 28 of the blade rubber 37 is moved in the longitudinal direction with respect to the lever assembly 32 (third lever 36) to which the base posture holding member 40 is attached, the base portion 28 is held by the holding portion 36b. The base 28 partially abuts on the plurality of protrusions 40a. Therefore, when the lever assembly 32 to which the base posture holding member 40 is attached and the blade rubber 37 are assembled, the frictional force generated between the base 28 and the base posture holding member 40 is reduced, and the assemblability is improved. be able to.

  In the second embodiment, the base portion 28 is tilted with respect to the posture of the base portion 28 in the holding portion 36b between the holding portion 36b of the third lever 36 and the longitudinal end portion of the blade rubber 37. A base posture holding means similar to the base posture holding member 33 that suppresses and holds the posture of the base portion 28 along the longitudinal direction may be separately attached to the lever assembly 32 (third lever 36).

  Alternatively, a base posture holding means according to the base posture holding member 40 is separately provided in the lever assembly 32 (third lever 36) between the holding portion 36b of the third lever 36 and the longitudinal end portion of the blade rubber 37. It may be attached. Even in this case, it is possible to improve the assembling property of the lever assembly 32 to which the base posture holding means is attached and the blade rubber 37.

  In the second embodiment, the coupling mode of the third lever 36 and the base posture holding member 33 (engagement by the engagement holes 36d and the engagement claws 33b) is an example, and other structures are adopted. Also good.

In the second embodiment, the base posture holding member 33 may be formed of a resin material.
In the second embodiment, the configuration of the lever assembly 32 (number of levers, etc.) is an example.

  In each of the above embodiments, the blade rubbers 14, 37, and 42 are made of a rubber material. However, the blade rubbers 14, 37, and 42 are not limited to rubber materials as long as they are elastically deformable materials (elastic materials).

The 1st Embodiment of this invention is shown, (a) is a top view, (b) is a front view. FIG. 2 is a cross-sectional view taken along line AA and CC in FIG. 1. FIG. 3 is a sectional view taken along line BB in FIG. 1. The perspective view which shows a blade rubber. The disassembled perspective view which shows the 2nd Embodiment of this invention. Sectional drawing which shows the same embodiment. The disassembled perspective view which shows the same embodiment. Sectional drawing which shows a modification. The fragmentary sectional view which shows a modification.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11, 31 ... Wiper blade, 11a ... Tracking end part, 12 ... Lever as lever member, 13, 41 ... Cover member which forms base attitude | position holding means, 13c ... 2nd accommodation groove as accommodating part, 13d ... Inner wall surface 14, 37, 42 ... blade rubber, 15, 38 ... backing, 16 ... wiper arm, 17, 34a ... connecting shaft, 23, 36b ... holding part, 24 ... gripper as holding member, 25 ... fin 25a ... inclined surface, 26 ... wiping surface, 28 ... base, 28b ... backing groove, 29 ... wiping portion, 32 ... lever assembly, 33, 40 ... base posture holding member as base posture holding means, 33a ... wall , 33c, 41a ... inner wall surface, 34 ... first lever, 35 ... second lever as lever, 36 ... third lever as lower lever, 40a ... projection.

Claims (7)

A lever assembly having a first lever to which a wiper arm is rotatably connected around a connecting shaft, and a plurality of levers rotatably connected to the first lever;
A base portion detachably held by a holding portion provided at a longitudinal end portion of the lever below the lever assembly and a wiping surface come into contact with the wiping surface, and are tilted and inverted with respect to the base portion to reciprocately wipe the wiping surface. A blade rubber having a wiping portion;
In the wiper blade with
The base assembly is attached to the lever assembly to prevent the base from falling against the posture of the base in the holding portion between the holding portions adjacent to each other or between the holding portion and the longitudinal end of the blade rubber. A wiper blade comprising base posture holding means for holding the posture of the base along the longitudinal direction. The wiper blade according to claim 1,
The base posture holding means includes a wall portion that surrounds the base portion between the holding portions adjacent to each other or between the holding portion and a longitudinal end portion of the blade rubber.
The wiper blade according to claim 1, wherein the base posture holding means suppresses the base portion from falling when the inner wall surface of the wall portion abuts on the base portion. The wiper blade according to claim 1,
The base posture holding means includes a plurality of protrusions arranged at intervals in the longitudinal direction between the holding parts adjacent to each other or between the holding part and the longitudinal end of the blade rubber.
The wiper blade according to claim 1, wherein the base posture holding means prevents the base from falling when the plurality of protrusions abut against the base. One lever member or holder member to which the wiper arm is rotatably connected around the connecting shaft;
A wiping surface that comes into contact with a wiping surface and is tilted and reversed with respect to the wiping surface, and a wiping surface that is detachably held by a holding portion provided at a longitudinal end of the lever member or a holding portion provided on the holder member A blade rubber having a wiping portion for reciprocating the surface;
A backing made of a spring material that is fitted in a backing groove formed in the base portion along the longitudinal direction, and whose central portion is curved in a convex shape toward the anti-wiping surface side, and
In the wiper blade having a followable end portion freely deformable following the curved shape of the wiping surface, between the holding portion and both longitudinal end portions of the blade rubber,
The base member is attached to the lever member or the holder member, and the base portion is prevented from falling with respect to the base portion posture of the holding portion between the holding portion and the longitudinal end portion of the blade rubber. A wiper blade comprising a base posture holding means for holding the blade along the longitudinal direction. The wiper blade according to claim 4, wherein
A cover member made of an elastic material fixed to the lever member or the holder member and having an accommodating portion for accommodating the base portion in the longitudinal direction;
The wiper blade according to claim 1, wherein the base posture holding means is formed by the cover member, and an inner wall surface forming the housing portion is brought into contact with the base to prevent the base from falling. The wiper blade according to claim 5, wherein
A holding member that is fixed to the housing portion between the holding portion and a longitudinal end portion of the blade rubber and holds the base portion in a removable manner;
The base posture holding means is provided between the holding part and the longitudinal end of the blade rubber, between the holding part and the holding member, or between the holding member and the longitudinal end of the blade rubber. The wiper blade according to claim 1, wherein an inner wall surface forming the housing portion abuts against the base portion to prevent the base portion from falling down. The wiper blade according to claim 5 or 6,
The wiper blade according to claim 1, wherein the cover member includes a fin portion that generates a pressing force in a direction of the wiping surface by receiving a traveling wind on an inclined surface inclined with respect to the wiping surface.

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