JP2006076505A - Wiper blade - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wiper blade capable of preventing deposition of snow and ice in a cold area, preventing foreign matters such as grit from being caught, and ensuring excellent wipe ability. <P>SOLUTION: The wiper blade 13 comprises a blade rubber 15 having a base part 15a and a wiping part 15b, a backing 16 consisting of a spring attached to the base part 15a, a lever member integrally having a holder part to be connected to a wiper arm and a holding part 14c to hold the base part 15a of the blade rubber 15 at an intermediate portion in the longitudinal direction, and a cover member 17 consisting of an elastic material to cover the base part 15a. The blade rubber 15 has a nerve part 15e to connect the wiping part 15b in a non-tiltable manner to the base part 15a. The wiping part 15b has a reducing part 15f with its width gradually reduced toward the tip side from the nerve part 15e in a sectional shape orthogonal to the longitudinal direction. The contact angle to a wiping surface 50a of the wiping part 15b is set in terms of the deflection of the wiping part 15b itself. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a wiper blade.

  2. Description of the Related Art Conventionally, a wiper blade of a vehicle wiper device is configured by a blade rubber having a backing attached to a lever assembly (lever member) that is formed by a plurality of levers (sub levers) rotatably connected to form a tournament. The so-called tournament type is generally used. In such a wiper blade, the pressing force from the wiper arm to which the lever assembly is connected is distributed to both ends in the longitudinal direction of the blade rubber by the end of each lever at the end of the tournament, and the blade rubber is pressed against the wiping surface. Become.

Further, the wiper blades other than the tournament type as described above do not have a plurality of levers, and use the elasticity of the backing (spring material) to press and contact the vicinity of both ends in the longitudinal direction of the blade rubber to the wiping surface. Yes (see, for example, Patent Document 1). In such a wiper blade, the connecting member for connecting the wiper arm and the blade rubber can be made simpler than that of a so-called tournament type. For example, the height (the dimension in the direction perpendicular to the wiping surface) can be reduced. Can be suppressed. Further, for example, in a so-called tournament type (a plurality of sub levers are rotatably connected), foreign matters such as snow are sandwiched in a rotating part that is rotatably connected (free rotation is hindered). There is a risk that followability and wiping performance may be impaired, but this can be avoided.
European Patent Application No. 1323922

  By the way, the blade rubber in the wiper blade as described above (see Patent Document 1) includes a base portion held by the connecting member (a holding portion thereof), a wiping portion that comes into contact with the wiping surface, and a wiping portion for these base portions. And a neck portion for connecting to each other in a tiltable manner. The neck portion has a cross-sectional shape perpendicular to the longitudinal direction of the blade rubber so that it becomes the center of tilting when the wiping portion tilts with the reversing operation of the wiper blade (to make the wiping portion easy to tilt). It is formed into a shape (narrow in width) confined between them. However, there is a risk that snow or ice may freeze on the neck portion or foreign matter such as gravel may be caught in a cold region. In such a case, the desired tilting operation of the wiping portion is hindered and wiping is performed. There is a problem that the sex is impaired.

  The present invention has been made in view of such circumstances, and its purpose is to prevent snow and ice from icing in a cold region and to prevent foreign matter such as gravel from being caught, and to provide good wiping performance. An object of the present invention is to provide a wiper blade that can be secured.

  In order to solve the above-mentioned problem, the invention according to claim 1 is a blade rubber having a base and a wiping portion that is wiped in sliding contact with the wiping surface, and is attached to the base, and in the longitudinal direction of the blade rubber. A lever member integrally having a backing made of a spring material formed into a curved shape, a holder portion connected to the wiper arm, and a holding portion for holding at least one of the base portion and the backing portion of the blade rubber in the middle portion in the longitudinal direction of the blade rubber And a cover member made of an elastic material that is attached to the lever member and covers at least a part of a base portion of the blade rubber to which the backing is mounted, and is provided on the longitudinal end side of the blade rubber from the holding portion. A wiper blur that presses and contacts the wiping surface against the wiping surface by the spring elasticity of the backing at the following end. The blade rubber has a rigid waist portion that non-tiltably connects the wiping portion with respect to the base portion in a cross-sectional shape perpendicular to the longitudinal direction, and the wiping portion extends from the rigid waist portion side to the distal end side. And a contact angle of the wiping part with respect to the wiping surface is set by the deformation of the wiping part itself.

  According to a second aspect of the present invention, in the wiper blade according to the first aspect, the cover member generates a force that presses the blade rubber against the wiping surface when it receives a traveling wind generated when the vehicle travels. Was formed integrally.

  According to a third aspect of the present invention, in the wiper blade according to the first or second aspect, the base portion of the blade rubber has a width direction opening that opens outward in both width directions in a cross-sectional shape perpendicular to the longitudinal direction. A backing groove is formed along a longitudinal direction, the backing is accommodated in the backing groove, and the cover member accommodates the base portion of the blade rubber so as to close the widthwise opening. Part.

  According to a fourth aspect of the present invention, in the wiper blade according to any one of the first to third aspects, the wiping portion of the blade rubber is an outer portion on the rigid waist side in a cross-sectional shape orthogonal to the longitudinal direction. And a concave portion that is concave with respect to a straight line connecting the tip of the wiping portion.

(Function)
According to the first aspect of the present invention, the lever member is configured so as to integrally include the holder portion connected to the wiper arm and the holding portion that holds at least one of the base portion and the backing portion of the blade rubber. Compared to the tournament type, for example, the height (dimension in the direction perpendicular to the wiping surface) can be suppressed, and the number of parts can be reduced, thereby reducing the cost. In addition, the lever member does not have a pivoting portion that is pivotally connected like a so-called tournament type (one in which a plurality of sub-levers are pivotally connected). There is no such thing as snow being pinched and wiping off.

  Further, the holding portion holds at least one of the base portion of the blade rubber and the backing and holds the blade rubber to which the backing is attached in the middle portion in the longitudinal direction. Free deformation is allowed. That is, the wiping portion can be brought into good contact with the wiping surface by the spring elasticity of the backing without hindering free deformation by the lever member.

  Furthermore, since the cover member attached to the lever member covers at least a part of the base portion of the blade rubber to which the backing is attached, the appearance is improved. Further, since the cover member is made of an elastic material, it is possible to prevent the backing deformation and the following deformation of the blade rubber.

  In addition, the blade rubber has a cross-sectional shape perpendicular to the longitudinal direction in which the rigid waist part is connected to the base so that the wiping part cannot be tilted, and the wiping part gradually narrows from the rigid waist part toward the tip side. The contact angle with the wiping surface of the wiping part is due to the bending (bending or bending) deformation of the wiping part itself (without the wiping part's bending deformation with respect to the base part without tilting operation). ) Is set so that, as in the conventional case, in order to obtain a contact angle with respect to the wiping surface of the wiping portion, the neck portion that allows the posture of the wiping portion to tilt with respect to the base, that is, the posture of the wiping portion with respect to the base can be tilted. Since there is no constricted part, snow or the like is not caught between the neck parts as in the conventional case, and the wiping property is not impaired.

  According to the second aspect of the present invention, the cover member is integrally formed with the fin portion that generates a force that presses the blade rubber against the wiping surface when receiving the traveling wind generated during traveling of the vehicle. Lifting of the blade rubber (wiper blade) is prevented. Therefore, good wiping properties can be ensured. Further, since the fin portion is integrally formed with the cover member, the number of parts does not increase.

  According to the third aspect of the present invention, the backing has a widthwise opening that opens outward in the widthwise direction in a cross-sectional shape perpendicular to the longitudinal direction formed along the longitudinal direction at the base of the blade rubber. It is accommodated in the groove. Therefore, the backing is configured to directly contact both the vertical direction and the vertical direction of the wiping surface with respect to the base portion of the blade rubber (inner wall of the backing groove) (the vertical direction), and the blade rubber can follow the deformation of the backing well. . In addition, since the cover member has an accommodating portion for accommodating the base portion of the blade rubber so as to close the widthwise opening of the backing groove, the backing is covered (in the width direction) together with the widthwise opening to improve the appearance. In addition, it is possible to prevent the backing from dropping out (in the width direction) from the backing groove (width direction opening).

  According to the fourth aspect of the present invention, the wiping portion of the blade rubber has a concave portion that is concave with respect to a straight line that connects the outer portion of the rigid waist portion and the tip of the wiping portion in a cross-sectional shape orthogonal to the longitudinal direction. The return from the bending deformation becomes smooth, and the wiping portion itself can favorably reverse the bending direction on the tip side with respect to the rigid waist side even when the wiper blade is reciprocally rotated (when the wiper is operated).

  ADVANTAGE OF THE INVENTION According to this invention, it can prevent that snow and ice adhere to ice, or foreign materials, such as gravel, are pinched | interposed, and can provide the wiper blade which can ensure favorable wiping property.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.
FIG. 1 shows a vehicle wiper 11 that wipes raindrops and the like adhering to a wiping surface 50a of a windshield (windshield glass) 50 of an automobile. The vehicle wiper 11 includes a wiper arm 12 and a wiper blade 13. The wiper arm 12 is fixed to a pivot shaft (not shown) whose base end is reciprocated at a predetermined angle by a driving force of a wiper motor (not shown), and reciprocally rotates along with the reciprocating rotation of the pivot shaft. Perform (swing) motion. A wiper blade 13 is rotatably connected to the tip of the wiper arm 12. The wiper arm 12 is provided with a spring (not shown) for applying a pressing force for pressing the wiper blade 13 against the wiping surface 50a.

As shown in FIGS. 1 to 3, the wiper blade 13 includes a lever member 14, a blade rubber 15, a pair of backings 16, and a cover member 17.
The lever member 14 includes a holder portion 14a that is rotatably connected to the wiper arm 12, an arm portion 14b that extends from the holder portion 14a toward both sides in the longitudinal direction, and a holding portion that is provided at the tip of each arm portion 14b. Gripping portion 14c. As shown in FIG. 3, the gripping part 14 c has a substantially U-shaped cross-sectional shape that is open in the lower part (lower side in FIG. 3, the wiping surface 50 a side), as shown in FIG. 3. Open ends extend inward from each other and are formed narrow. The length of the lever member 14 in the longitudinal direction, that is, the distance between the gripping portions 14c is set to be shorter than the length of the blade rubber 15, and is set to about 1/3 of the length of the blade rubber 15 in this embodiment. Has been.

  As shown in FIGS. 2 and 3, the blade rubber 15 is formed in a long shape with a rubber material, and is formed on a base 15 a that is formed uniformly in the longitudinal direction (with the same cross section) and a wiping surface 50 a. And a wiping portion 15b for wiping by contact (sliding contact). The base portion 15a and the wiping portion 15b are arranged side by side substantially perpendicular to the wiping surface 50a.

  As shown in FIG. 3, the base portion 15a has a cross-sectional shape perpendicular to the longitudinal direction of the blade rubber 15, and its width W1 is substantially the same as the width of the lever member 14, specifically, the width W2 between the inner walls of the gripping portion 14c. (Slightly smaller) is set. The base 15a is formed with a backing groove 15d (along the longitudinal direction) having a width direction opening 15c that opens in the width direction outward (direction parallel to the wiping surface 50a) in a cross-sectional shape orthogonal to the longitudinal direction. Has been. The backing groove 15d of the present embodiment is formed on both sides of the base portion 15a in the width direction.

  The wiping portion 15b is connected to the base portion 15a so as not to be tilted by the rigid waist portion 15e. The rigid waist portion 15e of the present embodiment is formed with the same (uniform) width from the center in the width direction of the base portion 15a toward the distal end side (wiping surface 50a side) in a cross-sectional shape orthogonal to the longitudinal direction.

  As shown in FIG. 3, the wiping portion 15b has a reduced width portion 15f whose width gradually decreases from the rigid waist portion 15e toward the distal end side in a cross-sectional shape orthogonal to the longitudinal direction, and a front end side from the reduced width portion 15f. And a constant width portion 15g formed with the same width. As indicated by a two-dot chain line in FIG. 3, the wiping portion 15b has a contact angle with the wiping surface 50a set by the deformation of the wiping portion 15b (the reduced width portion 15f and the constant width portion 15g). In other words, the rigid waist portion 15e is arranged so that its center line L1 coincides with the center line L2 of the blade rubber 15 regardless of the bending deformation of the wiping portion 15b as described above (for example, even if the contact angle is reversed). The width dimension (rigidity) and the like are set. In addition, the blade rubber 15 of the present embodiment has a neck portion (wiping portion is tilted) that allows the wiping portion to be tilted with respect to the base in order to obtain a contact angle with respect to the wiping surface of the wiping portion as in the prior art. There is no portion (narrower width) that becomes a center of tilting at the time between the base and the wiping portion. Further, in the reduced width portion 15f of the present embodiment, the ratio of the width that becomes narrower toward the tip side changes once in the middle (the ratio is configured in two stages, and the ratio is constant for each stage), and the tip The rate at which the side becomes thinner is set smaller, and the reduced width portion 15f as a whole has a tapered shape in which the width gradually decreases from the rigid waist portion 15e side toward the distal end side. Further, from these configurations, the wiping portion 15b of the blade rubber 15 according to the present embodiment includes an outer portion (the outermost portion in the width direction) on the rigid waist portion 15e side in a cross-sectional shape orthogonal to the longitudinal direction and a wiping portion 15b (constant A concave portion 15h having a concave shape (depressed toward the center line L2 of the blade rubber 15) with respect to a straight line X (indicated by a one-dot chain line in FIG. 3) connecting the tip of the width portion 15g) is formed on the center line L2. On the other hand, it has a line symmetrical shape on both sides.

  The backing 16 is formed in a long plate shape that is concavely curved in the direction of the wiping surface (curved with a radius of curvature smaller than the radius of curvature of the wiping surface 50a) with a spring material (a metal plate having spring properties), and the backing It is accommodated in the groove 15d.

  The blade rubber 15 in a state in which the backing 16 is accommodated (mounted) in the backing groove 15d has a base portion 15a held by the grip portion 14c (including the width direction opening portion 15c) in a cross-sectional shape perpendicular to the longitudinal direction. And is held by the lever member 14. At this time, the blade rubber 15 is held by the gripping portion 14c at an intermediate portion in the longitudinal direction (two boundary portions when the blade rubber 15 is divided into approximately three equal parts). Also, with this configuration, the end of the blade rubber 15 in the longitudinal direction (following end) from the gripping portion 14c is pressed and brought into contact with the wiping surface 50a by the curved shape of the backing 16 and the spring elasticity. It becomes composition.

  The cover member 17 is made of an elastic material such as an elastomer material or a rubber material, and a housing portion S (see FIG. 3) is formed in the blade rubber 15 side so as to extend in the longitudinal direction. It is attached to the lever member 14 so as to cover the 15 base portions 15 a and the backing 16. Specifically, as shown in FIG. 3, the cover member 17 has, in a cross-sectional shape orthogonal to the longitudinal direction, the upper surface and side surfaces (including the width direction opening 15 c of the backing groove 15 d) of the base portion 15 a (gripping portion 14 c). A cover portion 17a having an accommodating portion S having a substantially U-shaped cross section and a fin portion 17b extending upward from the cover portion 17a (upward in FIG. 3 and away from the wiping surface 50a) are integrally formed. Being done. Moreover, the cover part 17a of this Embodiment has the longitudinal direction coating | coated part 17c (refer FIG.1 and FIG.2) which covers the longitudinal direction opening part opened in the said longitudinal direction which the groove | channel 15d for backing has. In addition, in the accommodating portion S of the cover portion 17a (the bottom surface having a substantially U-shaped cross section), a gripping member 21 having the same shape as the gripping portion 14c and similarly fixed to the base portion 15a (see FIG. 2). Is fixed by an adhesive or the like. In the present embodiment, the gripping member 21 includes 6 ends in total, including two ends of the cover member 17 (blade rubber 15) and two ends (at predetermined intervals) between each end and the gripping portion 14c. It is provided. The fin portion 17b is formed with an inclined surface 17d that is inclined with respect to the wiping surface 50a in a cross-sectional shape orthogonal to the longitudinal direction. And the fin part 17b will produce the force which presses the blade rubber 15 (tip of the wiping part 15b) to the wiping surface 50a side, when the inclined surface 17d receives the driving | running | working wind which arises at the time of vehicle travel. The cover member 17 is formed of an elastic material (for example, a rubber material) having elasticity equal to or less than that of the blade rubber 15 so that the blade member 15 and the blade rubber 15 follow the change in the curvature of the wiping surface 50a. In other words, the blade rubber 15 is configured not to hinder follow-up deformation.

Next, characteristic effects of the above embodiment will be described below.
(1) Since the lever member 14 is configured to integrally include a holder portion 14a connected to the wiper arm 12 and a gripping portion 14c for holding the blade rubber 15, compared to a so-called tournament type, For example, the height (the dimension in the direction perpendicular to the wiping surface 50a) can be suppressed. Further, compared with a so-called tournament type, for example, the number of parts can be reduced and the cost can be reduced. Further, the lever member 14 does not have a pivoting portion that is pivotally connected like a so-called tournament type (one in which a plurality of sub-levers are pivotally connected). There will be no loss of wiping property due to snow or the like. As a result, for example, good wiping property in a cold region can be ensured.

  In addition, since the gripping portion 14c is configured to hold the base portion 15a (backing 16) of the blade rubber 15 at the middle portion in the longitudinal direction of the blade rubber 15, the longitudinal end portion side (following end) of the blade rubber 15 from the gripping portion 14c. Part), free deformation of the backing 16 is allowed. That is, the free end deformation is not hindered by the lever member 14, and the tip of the wiping portion 15 b can be pressed and brought into good contact with the wiping surface 50 a by the spring elasticity of the backing 16. As a result, the tip of the wiping portion 15b can follow the wiping surface 50a, and good wiping properties can be ensured.

  Furthermore, since the cover member 17 (cover portion 17a) covers the base portion 15a and the backing 16 of the blade rubber 15, the appearance is improved. Further, since the cover member 17 is made of an elastic material, it is possible to prevent the following deformation of the backing 16 and the blade rubber 15 from being hindered. As a result, the tip of the wiping portion 15b can follow the wiping surface 50a, and good wiping properties can be ensured.

  Moreover, the blade rubber 15 has a cross-sectional shape orthogonal to the longitudinal direction, and the rigid waist 15e connects the wiping portion 15b to the base 15a so as not to tilt, and the wiping portion 15b extends from the rigid waist 15e side to the tip side. There is a reduced width portion 15f whose width is gradually narrowed. Then, the contact angle of the wiping portion 15b with respect to the wiping surface 50a is caused by the bending (bending or bending) deformation of the wiping portion 15b itself (by the bending deformation of the wiping portion 15b itself without the tilting operation of the wiping portion 15b with respect to the base portion 15a). Is set. With this configuration, as in the prior art, in order to obtain a contact angle with respect to the wiping surface of the wiping portion, a neck portion that allows the posture of the wiping portion to tilt with respect to the base portion, that is, a tie that enables the posture of the wiping portion to tilt with respect to the base portion. Since there is no portion, snow or the like is not caught between the neck portions as in the conventional case, and the wiping property is not impaired. As a result, for example, good wiping property in a cold region can be ensured.

  (2) Since the cover member 17 is integrally formed with a fin portion 17b (inclined surface 17c) that generates a force for pressing the blade rubber 15 toward the wiping surface 50a when receiving a traveling wind generated during traveling of the vehicle, the cover member 17 is particularly high-speed traveling. The lift of the blade rubber 15 (wiper blade 13) at the time is prevented. Therefore, good wiping properties can be ensured. Further, since the fin portion 17b is integrally formed with the cover member 17, the number of parts does not increase.

  (3) The backing 16 has a widthwise opening that opens outward in the widthwise direction (in a direction parallel to the wiping surface 50a) in a cross-sectional shape perpendicular to the longitudinal direction formed in the base portion 15a of the blade rubber 15 along the longitudinal direction. It is accommodated in a backing groove 15d having a portion 15c. Therefore, the backing 16 is both in the direction perpendicular to the wiping surface 50a with respect to the base portion 15a of the blade rubber 15 (inner wall of the backing groove 15d) (the vertical direction in FIG. 3 and the direction in which the backing 16 has elasticity). The blade rubber 15 follows the deformation of the backing 16 satisfactorily. Moreover, the cover member 17 (the cover portion 17a) has a housing portion S that houses the base portion 15a of the blade rubber 15 so as to close the width direction opening portion 15c of the backing groove 15d. Therefore, the backing 16 is covered (in the width direction) together with the width direction opening 15c to improve the appearance, and the backing 16 is removed from the backing groove 15d (width direction opening 15c) (in the width direction). Is prevented.

  (4) Since the cover portion 17a has the longitudinal covering portion 17c that covers (closes) the longitudinal opening portion of the backing groove 15d that opens in the longitudinal direction, the backing portion 16 (in the longitudinal direction) ) The appearance is improved by being covered, and the falling of the backing 16 from the backing groove 15d (longitudinal opening) (in the longitudinal direction) is prevented.

  (5) The gripping portion 14c holds the base portion 15a in a cross-sectional shape perpendicular to the longitudinal direction of the blade rubber 15 in a state where the backing 16 is accommodated in the backing groove 15d (covers including the width direction opening portion 15c). In this way, it is held (gripped). Accordingly, the backing 16 is further prevented from falling off (in the width direction) from the backing groove 15d (width direction opening 15c).

  (6) Between the longitudinal tip of the blade rubber 15 and the gripping portion 14c, the gripping member 21 fixed in the same manner to the base portion 15a is fixed to the cover member 17 in the same shape as the gripping portion 14c. . Accordingly, the backing rubber 15 is prevented from falling off (in the width direction) from the backing groove 15d (width direction opening 15c) between the longitudinal tip of the blade rubber 15 and the gripping portion 14c.

  (7) The wiping portion 15b of the blade rubber 15 includes an outer portion (outermost portion in the width direction) on the rigid waist portion 15e side and a tip of the wiping portion 15b (constant width portion 15g) in a cross-sectional shape orthogonal to the longitudinal direction. A concave portion 15h that is concave (convex inward) with respect to the connecting straight line X (indicated by a one-dot chain line in FIG. 3) is provided. In this way, the return from the bending deformation is smooth, and the wiping portion 15b itself has a better bending direction on the tip side than the rigid waist portion 15e even when the wiper blade 13 is reciprocally rotated (when the wiper is activated). Can be reversed.

The above embodiment may be modified as follows.
The blade rubber 15 of the above embodiment has a base, a wiping part, and a rigid waist part that connects the wiping part to the base so as not to tilt, and the wiping part is from the rigid waist side in a cross-sectional shape orthogonal to the longitudinal direction. The width of the wiping portion may be changed as long as the contact angle with the wiping surface of the wiping portion is set by the bending deformation of the wiping portion itself.

  For example, the blade rubber 31 shown in FIG. 4 may be changed. The blade rubber 31 has a base portion 31a, a wiping portion 31b, and a rigid waist portion 31c that connects the wiping portion 31b to the base portion 31a so as not to tilt.

  The base portion 31a is formed in the same manner as the base portion 15a in the above-described embodiment, and a backing groove 31e having a width direction opening portion 31d (similar to the backing groove 15d in the above-described embodiment) is formed in the base portion 31a. Yes.

The rigid waist portion 31c is formed with the same (uniform) width from the center in the width direction of the base portion 31a toward the distal end side (wiping surface 50a side) in a cross-sectional shape orthogonal to the longitudinal direction.
The wiping portion 31b has a cross-sectional shape perpendicular to the longitudinal direction, and the end portion on the side of the rigid waist portion 31c is formed wider than the rigid waist portion 31c (specifically, the same width as the base portion 31a), and the width from the rigid waist portion 31c side toward the distal end side. Has a reduced width portion 31f that gradually narrows, and a constant width portion 31g that is formed with the same width from the reduced width portion 31f toward the tip side. As indicated by a two-dot chain line in FIG. 4, the wiping portion 31b has a contact angle with the wiping surface 50a set by the deformation of the wiping portion 31b (the reduced width portion 31f and the constant width portion 31g). In other words, the rigid waist portion 31c is arranged so that its center line L3 coincides with the center line L4 of the blade rubber 31 regardless of the bending deformation of the wiping portion 31b as described above (for example, even if the contact angle is reversed). The width dimension (rigidity) etc. are set. The blade rubber 31 of this example has a neck portion (when the wiping portion is tilted) that allows the posture of the wiping portion to be tilted with respect to the base portion in order to obtain a contact angle with the wiping surface of the wiping portion as in the prior art. There is no portion that is constricted (narrow) between the base and the wiping portion. The blade rubber 31 has a portion (stiff waist 31c) that looks similar to the conventional neck portion at first glance, but its function (rigidity) is clearly different from the conventional neck portion. Even if ice is deposited on 31c (between the base portion 31a and the wiping portion 31b) or foreign matter such as gravel is sandwiched, the wiping portion 31b itself is not hindered from being deformed, so that the wiping property is not impaired. Further, in the reduced width portion 31f of this example, the ratio of the width that becomes narrower toward the tip end side changes in the middle. Specifically, in the reduced width portion 31f, the ratio of the width that becomes narrower from the rigid waist portion 31c side toward the distal end side changes continuously (so that it gradually decreases) (the cross-sectional shape orthogonal to the longitudinal direction is curved). The curved reduced width portion 31h and the linear reduced width portion 31i in which the ratio of the width that narrows from the curved reduced width portion 31h toward the tip side is constant (the cross-sectional shape orthogonal to the longitudinal direction is linear). Further, from these configurations, the wiping portion 31b has a straight line Y (see FIG. 4) that connects the outer portion (the outermost portion in the width direction) on the rigid waist portion 31c side and the tip of the wiping portion 31b in a cross-sectional shape orthogonal to the longitudinal direction. A concave portion 31j that is concave with respect to the center line L4 of the blade rubber 31 is formed symmetrically on both sides with respect to the center line L4. Even if it does in this way, the effect substantially the same as the effect of the said embodiment can be acquired.

Further, for example, the blade rubber may be changed so that the concave portions 15h and 31j are not formed (does not exist).
The cover member 17 (cover portion 17a) of the above embodiment has a housing portion S that covers the upper surface and side surfaces (including the widthwise opening portion 15c of the backing groove 15d) of the base portion 15a (gripping portion 14c). However, the present invention is not limited to this, and any other shape may be used as long as it covers at least part of the base of the blade rubber to which the backing is attached.

  -In above-mentioned embodiment, although the fin part 17b was integrally formed in the cover member 17, it is not limited to this, You may fix to a cover member as a separate fin part, and a structure without a fin part You may change to

-In above-mentioned embodiment, although the cover part 17a had the longitudinal direction coating | coated part 17c, it is not limited to this, You may change into the shape which does not have the longitudinal direction coating | coated part 17c.
In the above embodiment, the backing 16 is accommodated in the backing groove 15d formed in the base 15a of the blade rubber 15. However, the present invention is not limited to this, and is fixed (attached) to the base of the blade rubber. Any other configuration may be used as long as it is configured.

  -The holding part 14c of the said embodiment may be changed into the holding part of another structure, if at least one of the base part and backing of a blade rubber can be hold | maintained in the longitudinal direction intermediate part of a blade rubber.

  In the above embodiment, the cover member 17 is fixed to the gripping member 21 that grips the base portion 15a between the longitudinal tip of the blade rubber 15 and the gripping portion 14c. The cover member 17 and the base portion 15a of the blade rubber 15 may be fixed by another member or another method (for example, an adhesive).

The technical idea that can be grasped from the above embodiments will be described below together with the effects thereof.
(B) The wiper blade according to claim 3, wherein the backing groove has a longitudinal opening that opens in a longitudinal direction of the blade rubber, and the cover member covers the longitudinal opening. A wiper blade having a covering portion. In this way, the backing is covered (longitudinal direction) with the longitudinal opening in the longitudinal covering portion to improve the appearance, and from the backing groove (longitudinal opening) of the backing (in the longitudinal direction). Of) is prevented from falling out.

  (B) The wiper blade according to claim 3 or (a), wherein the holding portion closes the opening in the width direction in a state where the backing is accommodated in the backing groove. A wiper blade characterized by being a gripping part for gripping a base part. This further prevents the backing from falling off (in the width direction) from the backing groove (width direction opening).

  (C) In the wiper blade according to any one of (3) and (A) and (B) above, the wiper blade is fixed to the cover member between a longitudinal tip of the blade rubber and the holding portion, and A wiper blade, comprising: a gripping member that grips the base portion of the blade rubber so as to close the widthwise opening in a state in which the backing is accommodated in the backing groove. This prevents the backing from falling off (in the width direction) from the backing groove (width direction opening) between the longitudinal tip of the blade rubber and the holding portion.

The perspective view which shows the wiper blade of this Embodiment. The disassembled perspective view which shows the wiper blade of this Embodiment. AA sectional drawing of FIG. Sectional drawing of the wiper blade of another example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 12 ... Wiper arm, 14 ... Lever member, 14a ... Holder part, 14c ... Grasping part (holding part), 15, 31 ... Blade rubber, 15a, 31a ... Base part, 15b, 31b ... Wiping part, 15c, 31d ... Width direction opening Part, 15d, 31e ... backing groove, 15e, 31c ... rigid waist part, 15f, 31f ... reduced width part, 15h, 31j ... concave part, 16 ... backing, 17 ... cover member, 17b ... fin part, 50a ... wiping surface , S: accommodating portion, X, Y: straight line.

Claims (4)

A blade rubber having a base and a wiping portion slidably in contact with the wiping surface;
A backing made of a spring material attached to the base and curved in the longitudinal direction of the blade rubber;
A lever member integrally having a holder portion connected to the wiper arm, and a holding portion for holding at least one of a base portion and a backing portion of the blade rubber in a longitudinal intermediate portion of the blade rubber;
A cover member made of an elastic material that is attached to the lever member and covers at least a part of the base of the blade rubber to which the backing is mounted, and a follow-up end on the longitudinal end side of the blade rubber from the holding portion A wiper blade that presses and contacts the wiping portion to the wiping surface by the spring elasticity of the backing at the portion,
The blade rubber has a rigid waist portion that non-tiltably connects the wiping portion to the base in a cross-sectional shape perpendicular to the longitudinal direction, and the wiping portion gradually increases in width from the rigid waist portion side toward the distal end side. The wiper blade according to claim 1, wherein the wiper blade has a reduced width portion, and a contact angle of the wiping portion with respect to the wiping surface is set by bending deformation of the wiping portion itself. The wiper blade according to claim 1,
The wiper blade according to claim 1, wherein the cover member is integrally formed with a fin portion that generates a force that presses the blade rubber against the wiping surface when receiving a traveling wind generated when the vehicle travels. The wiper blade according to claim 1 or 2,
In the base portion of the blade rubber, a backing groove is formed along the longitudinal direction having a width direction opening that opens outward in both sides in the width direction in a cross-sectional shape orthogonal to the longitudinal direction.
The backing is housed in the backing groove;
The wiper blade according to claim 1, wherein the cover member includes an accommodating portion that accommodates the base portion of the blade rubber so as to close the opening in the width direction. The wiper blade according to any one of claims 1 to 3,
The wiper blade characterized in that the wiping portion of the blade rubber has a concave portion that is concave with respect to a straight line connecting the outer portion on the rigid waist side in the cross-sectional shape perpendicular to the longitudinal direction and the tip of the wiping portion. .

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