JP2008120112A - Wiper blade - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve fin performance during wiping operation in which a posture to a traveling wind is changed, and to reduce lifting from the wiping surface of blade rubber, in a wiper blade equipped with the blade rubber having a fin. <P>SOLUTION: The blade rubber 13 equipped to the wiper blade 11 has the fin 13c, and a regulating wall 13f is raised on the wind receiving surface 13d of the fin 13c. Namely, even if the traveling wind diagonally hits on the fin 13c from a side during the wiping operation of the wiper blade 11, a flow in the longitudinal direction of the traveling wind is regulated. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a wiper blade including a blade rubber having a fin portion for receiving a traveling wind at the time of forward movement of the vehicle and generating a pressing force that presses against a wiping surface side.

  A blade rubber that wipes the wiping surface of the vehicle windshield (windshield glass) is supported by a leaf spring member having the same length, and the longitudinal center of the leaf spring member is held or the leaf spring member is mounted. A wiper blade is known that is configured to be connected to the tip of a wiper arm by a holding member that holds the central portion in the longitudinal direction of the blade rubber.

In this type of wiper blade, the blade rubber protrudes from both sides of the holding member, so that the pressing force from the wiper arm for pressing the blade rubber toward the wiping surface is at the end of the portion protruding from both sides of the holding member. The more you head, the harder it is to work. For this reason, for example, as shown in Patent Document 1, in a portion protruding from the holding member of the blade rubber, a fin portion for receiving a traveling wind and obtaining a pressing force toward the wiping surface by the blade rubber itself is a blade rubber. The upper portion of the blade rubber is continuously formed in the longitudinal direction thereof, and is prevented from lifting from the wiping surface of the blade rubber.
JP-T-2001-50479

  However, when the wiper blade wipes the wiping surface, the wiper blade rotates together with the wiper arm about the pivot shaft, so that the posture with respect to the traveling wind sequentially changes. In other words, when the fin part formed on the blade rubber hits the direction perpendicular to the longitudinal direction of the blade rubber, a sufficient fin effect can be obtained, but the wiper blade rotates and the longitudinal direction of the blade rubber with respect to the fin part. As the wind comes in contact with the direction parallel to the traveling direction, the traveling wind escapes in the longitudinal direction along the fin portion, and there is a problem that a great effect by the fin portion cannot be expected.

  The present invention has been made in order to solve the above-described problems, and an object of the present invention is to achieve fin performance during a wiping operation in which a posture with respect to traveling wind changes in a wiper blade including a blade rubber having a fin portion. It is an object of the present invention to provide a wiper blade which can be improved and can further reduce the lifting from the wiping surface of the blade rubber.

  In order to solve the above-mentioned problem, the invention according to claim 1 is a wiper blade configured using a blade rubber having a fin portion for generating a pressing force that receives the traveling wind and presses it against the wiping surface side. The gist of the invention is that at least one restriction wall is provided on the wind receiving surface of the fin portion to restrict the flow of the traveling wind in the longitudinal direction.

  In this invention, when the regulation wall is erected on the wind receiving surface of the fin portion of the blade rubber, the wind generated when the wiper blade moves forward during the wiping operation strikes the fin portion obliquely from the side. Even so, the flow of the traveling wind in the longitudinal direction of the blade rubber is restricted. As a result, even when the wiper blade is in the middle of the wiping operation, a sufficient pressing force to the wiping surface generated at the fin part can be obtained and a high fin effect can be obtained, further reducing the lifting of the blade rubber from the wiping surface it can.

  According to a second aspect of the present invention, in the wiper blade of the first aspect, the wind receiving surface of the fin portion has a concave shape, and the restriction wall has at least the concave shape of the wind receiving surface of the fin portion. Its gist is that it is formed in a size that fills the portion.

  In the present invention, the wind receiving surface of the fin portion has a concave shape, and the restriction wall is formed with a size that fills at least the concave portion of the wind receiving surface. As a result, the restriction wall is reliably supported by the inner wall of the concave portion, so that the flow of the traveling wind in the longitudinal direction can be reliably received even if the restriction wall is thin.

The gist of the invention described in claim 3 is that, in the wiper blade according to claim 1 or 2, the restriction wall has a plate shape along the width direction of the wiper blade.
In this invention, since the regulation wall is formed in a plate shape along the width direction of the wiper blade, the regulation wall can be easily formed and the flow of the traveling wind in the vicinity of the regulation wall is not disturbed.

  The gist of the invention described in claim 4 is the wiper blade according to claim 1 or 2, wherein the restriction wall is curved in such a way that the traveling air introduction side is curved toward one side in the longitudinal direction.

  In this invention, since the restriction wall is curved so that the introduction side of the traveling wind is directed toward one side in the longitudinal direction, the wiper blade travels in the middle of the wiping operation by directing this curved direction toward the rotation center side of the wiper arm. When the wind strikes the fin portion obliquely from the side, it is possible to smoothly guide the traveling wind that strikes the fin portion in a direction orthogonal to the fin portion.

  According to a fifth aspect of the present invention, in the wiper blade according to any one of the first to fourth aspects, the connecting portion for connecting to the tip end portion of the wiper arm, and extending from both longitudinal sides of the connecting portion, respectively. The blade rubber is provided with a lever member having an arm portion and a holding portion that is formed at a tip portion of the arm portion and holds the blade rubber, and is mounted with a leaf spring member having a length equivalent to the blade rubber. In the longitudinal direction of the lever member so as to follow the curve of the wiping surface, and the fin portion having the restriction wall is formed on the following end of the blade rubber. The gist is that it is provided.

  According to the present invention, in the wiper blade that constitutes a follow-up end portion that causes the blade rubber to protrude long in the longitudinal direction from the holding portion of the lever member that is connected to the wiper arm and follows the curvature of the wiping surface, the follow-up end portion of the blade rubber The fin part which has a control wall is provided in this. In other words, in the wiper blade having such a configuration, the following end of the blade rubber that protrudes long from the holding portion of the lever member is likely to be lifted from the wiping surface by the traveling wind, and therefore the following fin end has a fin effect. The significance of providing a fin portion having a regulating wall that is high is significant.

  A sixth aspect of the invention is the wiper blade according to the fifth aspect, wherein the arm portion of the lever member is provided with a fin portion that is continuous with the fin portion of the blade rubber. And

  In this invention, the arm part of the lever member is provided with a fin part that is continuous with the fin part of the blade rubber. Accordingly, not only the blade rubber but also the fin portion of the lever member generates a pressing force toward the wiping surface, so that the lifting from the wiping surface of the blade rubber can be further reduced.

  Therefore, according to the above-described invention, it is possible to provide a wiper blade that can improve fin performance during a wiping operation in which the posture with respect to the traveling wind changes, and can further reduce lifting from the wiping surface of the blade rubber. .

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.
FIG. 1 shows a wiper blade 11 in the present embodiment. The wiper blade 11 wipes the wiping surface 1a of the windshield 1 of the automobile, and is detachably attached to the tip of the wiper arm 10 that rotates at a predetermined angle by driving the wiper motor 2 (FIG. 2). reference). The wiper blade 11 includes a lever member 12, a blade rubber 13, and a backing 14.

  The lever member 12 is formed by pressing a metal plate material, and has a longitudinal length of about one third of the wiper blade 11 (blade rubber 13). A connecting portion 12 a is provided at the longitudinal center of the lever member 12, and a clip member 15 is rotatably connected to the connecting portion 12 a by a connecting pin 16 mounted along the width direction of the wiper blade 11. ing. The clip member 15 is detachably connected to the distal end portion of the wiper arm 10. A pair of arm portions 12b extending in the same direction are integrally provided on both sides in the longitudinal direction of the connecting portion 12a (only one arm portion 12b is shown in FIG. 1).

  A holding portion 12 c for holding the blade rubber 13 is integrally provided at the distal end portion of the arm portion 12 b, that is, at both end portions in the longitudinal direction of the lever member 12. The holding portion 12c is configured such that a pair of claw-like portions protrudes inward in the width direction, and holds the blade rubber 13 at two positions obtained by dividing the blade rubber 13 into approximately three equal lengths. Further, the arm portion 12b is provided with a fin portion 12d that is bent into a mountain fold shape and generates a pressing force that presses the blade rubber 13 toward the wiping surface 1a through the holding portion 12c when receiving the traveling wind during forward traveling of the vehicle. It has been.

  The blade rubber 13 is made of an elastic material and has a long length. As shown in FIG. 1B, the blade rubber 13 has backing receiving grooves 13a on both sides in the width direction, and holding grooves 13b below the receiving grooves 13a. have. The backing housing groove 13 a and the holding groove 13 b are formed over substantially the entire longitudinal direction of the blade rubber 13. A pair of claw-like portions constituting the holding portion 12c of the lever member 12 is inserted into the holding groove 13b from the longitudinal direction, and the blade rubber 13 is moved relative to the lever member 12 by insertion of the holding portion 12c into the holding groove 13b. Held. In the holding groove 13b, there is provided a locking portion (not shown) for locking with the claw-shaped portion of one holding portion 12c, and the blade rubber 13 is separated from the lever member 12 during use by mutual locking. It is prevented from falling out.

  A pair of backings 14 as leaf spring members having a length in the longitudinal direction equivalent to that of the blade rubber 13 are accommodated in the backing accommodation grooves 13 a of the blade rubber 13. The backing 14 is formed in a curved shape having a curvature larger than the curvature of the wiping surface 1a, with the central portion in the longitudinal direction of the blade rubber 13 protruding from the wiping surface 1a when the backing 14 is mounted. The backing 14 disperses the pressing force transmitted from the wiper arm 10 to the wiping surface 1 a side transmitted from the holding portion 12 c of the lever member 12 in the longitudinal direction of the blade rubber 13.

  From the upper end (upper surface) of the blade rubber 13, a portion protruding in the longitudinal direction from both ends (holding portion 12 c) of the lever member 12, that is, a free end that is not held by the lever member 12 to follow the curvature of the wiping surface 1 a In the following end portion X, a fin portion 13c having a substantially triangular cross section that is continuous toward both end portions in the longitudinal direction is erected so that the external shape of the fin portion 12d provided on the arm portion 12b is continuous. The fin portion 13c has a wind receiving surface 13d that is concaved by a flat surface 13d1 and an inclined surface 13d2 on one side in the width direction, that is, the side on which the traveling wind strikes, and the top portion 13e is on the other side of the center line in the width direction. It is offset. When the traveling wind hits the fin portion 13c, a pressing force that presses the blade rubber 13 toward the wiping surface 1a is generated as in the fin portion 12d.

  Further, in the fin portion 13c, four regulating walls 13f are erected on the concave wind receiving surface 13d in the present embodiment (only one fin portion 13c is shown in FIG. 1). Incidentally, caps 17 for preventing the backing 14 from coming off are respectively attached to both ends of the blade rubber 13 of the present embodiment, and one of the regulating walls 13f is located in the vicinity of the cap 17. The remaining three members are arranged at equal intervals from there to the lever member 12. Each regulation wall 13f extends in a square plate shape along the width direction so as to be connected to the flat surface 13d1 and the inclined surface 13d2 of the wind receiving surface 13d, and is formed at substantially the same height as the top portion 13e of the fin portion 13c.

  Here, as shown in FIG. 2, the wiper blade 11 of the present embodiment is configured so that the longitudinal direction of the blade 11 is substantially parallel to the vehicle width direction at the lower end of the windshield 1 due to the rotation of the wiper arm 10 at a predetermined angle. The range from the lower inversion position P1 that is substantially orthogonal to the wind to the upper inversion position P2 that is approximately orthogonal to the vehicle width direction (substantially parallel to the traveling wind) is wiped. Incidentally, the stop position of the wiper blade 11 is set to the lower inversion position P1.

  When the wiper blade 11 wipes from the lower inversion position P1 (rotation angle 0 °) to the upper inversion position P2 (rotation angle about 90 °) in this way, the posture of the fin portion 13c with respect to the traveling wind is successively changed. Change. That is, when the wiper blade 11 is located at the lower reversal position P1, the wiper blade 11 hits the fin portion 13c (slope 13d2) in the orthogonal direction, but on the way to the upper reversal position P2, for example, the intermediate position P3 (rotation angle) 45 °), it comes into contact with the fin portion 13c obliquely from the side, and eventually comes into contact with the fin portion 13c in a direction parallel to the upper inversion position P2.

  That is, at the lower inversion position P1 that is perpendicular to the fin portion 13c, the traveling wind strikes the fin portion 13c and a sufficient pressing force toward the wiping surface 1a is obtained, thereby obtaining a high fin effect. Moreover, when the wiper blade 11 strikes the fin portion 13c obliquely from the side as the wiper blade 11 moves from the lower inversion position P1 to the upper inversion position P2 (see the running wind C in FIG. 1), the blade rubber. In this embodiment, since the restriction wall 13f is erected on the fin portion 13c, the flow in the longitudinal direction of the traveling wind is restricted and the fin portion 13c has the slope 13d2 side. (See traveling wind A in FIG. 1), a pressing force acts on the fin portion 13c on the upper portion of the blade rubber 13. On the other hand, in the wiping portion 13x (near the wiping surface 1a) of the blade rubber 13 at this time, the traveling wind smoothly flows in the longitudinal direction along or hitting the wiping portion 13x (see traveling wind B in FIG. 1). The pressure at the wiping portion 13x (near the wiping surface 1a) of the blade rubber 13 is reduced.

  That is, not only the fin portion 13c of the blade rubber 13 is pressed by the traveling wind, but the pressure at the upper portion of the fin portion 13c is relatively higher than that of the wiping portion 13x (near the wiping surface 1a). The pressure effect is also enhanced by the relative air pressure distribution around 13. Incidentally, even if the wind is flowing along the longitudinal direction of the blade rubber 13 when the wiper blade 11 is in the upper inversion position P2, the flow of the traveling wind in the longitudinal direction is restricted by the restriction wall 13f. The upper portion of the fin portion 13c has a relatively higher pressure than the wiping portion 13x (near the wiping surface 1a), and a pressing effect is obtained. As described above, the wiper blade 11 according to the present embodiment can obtain a high fin effect by sufficiently obtaining the pressing force toward the wiping surface 1a even during the wiping operation from the lower inversion position P1 to the upper inversion position P2. Thus, the floating of the blade rubber 13 from the wiping surface 1a can be further reduced.

Next, characteristic actions and effects of the present embodiment will be described.
(1) In the wiper blade 11 of the present embodiment, since the regulating wall 13f is erected on the wind receiving surface 13d of the fin portion 13c of the blade rubber 13, the wiper blade 11 is in the middle of the wiping operation (for example, at an intermediate position). Even in the case where the traveling wind strikes the inclined surface 13d2 of the fin portion 13c obliquely from the side (in P3), the flow of the traveling wind in the blade rubber longitudinal direction is restricted. Thereby, even when the wiper blade 11 is in the middle of the wiping operation, a sufficient pressing force to the wiping surface 1a generated at the fin portion 13c can be obtained and a high fin effect can be obtained, and the wiping surface 1a of the blade rubber 13 Can be further reduced.

  In particular, as in the present embodiment, in the wiper blade 11 constituting the follow-up end portion X that causes the blade rubber 13 to protrude long in the longitudinal direction from the holding portion 12c of the lever member 12 and follow the curvature of the wiping surface 1a, the blade Since the follow-up end X of the rubber 13 is likely to be lifted from the wiping surface 1a due to the traveling wind, it is significant to provide the fin 13c having the restriction wall 13f that increases the fin effect on the follow-up end X.

  (2) In the present embodiment, the wind receiving surface 13d of the fin portion 13c is formed in a concave shape, and the regulation wall 13f is formed in a square plate shape slightly larger than the concave portion of the wind receiving surface 13d. Thereby, since the regulation wall 13f is reliably supported by the inner wall (slope 13d2 and flat surface 13d1) of the concave portion, the flow in the longitudinal direction of the traveling wind can be reliably received even if the regulation wall 13f is thin. .

  (3) In the present embodiment, since the regulation wall 13f is formed in a plate shape along the width direction of the wiper blade 11, the regulation wall 13f can be easily formed and travels in the vicinity of the regulation wall 13f. Does not disturb the flow of wind.

  (4) In the present embodiment, a fin portion 12 d that is continuous with the fin portion 13 c of the blade rubber 13 is provided for the arm portion 12 b of the lever member 12. As a result, not only the blade rubber 13 but also the fin portion 12d of the lever member 12 has a pressing force toward the wiping surface 1a, so that the lifting of the blade rubber 13 from the wiping surface 1a can be further reduced.

The embodiment of the present invention may be modified as follows.
In the above embodiment, the wind receiving surface 13d of the fin portion 13c of the blade rubber 13 is concaved by the flat surface 13d1 and the inclined surface 13d2, but may be curved.

  In the above embodiment, the regulation wall 13f is formed in a plate shape along the width direction of the blade rubber 13. However, as shown in FIG. 3, for example, the regulation wall 13g faces the introduction side of the traveling wind toward one side in the longitudinal direction. May be curved. As a result, the curved direction is directed toward the rotation center side of the wiper arm 10, so that the traveling wind strikes the fin portion 13c obliquely from the side during the wiping operation of the wiper blade 11 (for example, at the intermediate position P3). In such a case, it is possible to smoothly guide the traveling wind hitting from the oblique direction in a direction orthogonal to the inclined surface 13d2 of the fin portion 13c.

  In the above embodiment, the restriction wall 13f is formed in a square plate shape slightly larger than the concave portion of the wind receiving surface 13d. However, for example, it may be formed in a fan shape or a triangular plate shape equivalent to the concave portion. Moreover, it is good also as a control wall a little smaller than the concave part of the wind-receiving surface 13d.

  In the above embodiment, the four regulating walls 13f are provided at equal intervals in each of the following end portions X of the blade rubber 13 protruding from the lever member 12, but the intervals are unequal, the number is three or less, or It is good also as five or more.

  In the above embodiment, the regulation wall 13f is formed integrally with the fin portion 13c of the blade rubber 13. However, the regulation wall may be formed of a separate member and retrofitted to the fin portion 13c of the blade rubber 13.

  In the above embodiment, the holding member that holds the blade rubber 13 is applied to the wiper blade 11 that is configured by one lever member 12. However, for example, the holding member that is configured by a plurality of lever members is used. The present invention may be applied to a configuration using a holding member that holds the backing 14 side and holds the blade rubber 13 via the backing 14.

Next, technical ideas that can be grasped from the above-described embodiment and other examples will be described below.
(A) A blade rubber having a fin portion for receiving a traveling wind and generating a pressing force that presses the wiping surface, and flows in the longitudinal direction of the traveling wind on the wind receiving surface of the fin portion. A blade rubber characterized in that at least one restriction wall is provided to restrict the above. Thereby, the same effect as that of claim 1 can be obtained.

(A) is a perspective view of the wiper blade in this Embodiment, (b) is YY sectional drawing in the blade rubber of (a). It is a figure for demonstrating the effect | action of the wiper blade of this Embodiment. It is a figure for demonstrating the effect | action of the wiper blade in another example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1a ... Wiping surface, 10 ... Wiper arm, 11 ... Wiper blade, 12 ... Lever member, 12a ... Connection part, 12b ... Arm part, 12c ... Holding part, 12d ... Fin part, 13 ... Blade rubber, 13c ... Fin part, 13d A wind receiving surface, 13f ... a regulating wall, 13g ... a regulating wall, 14 ... a backing as a leaf spring member, X ... a follow-up end.

Claims (6)

A wiper blade including a blade rubber having a fin portion for generating a pressing force to receive the traveling wind and press against the wiping surface side,
The wiper blade according to claim 1, wherein at least one regulating wall for regulating the flow of the traveling wind in the longitudinal direction is provided on the wind receiving surface of the fin portion. The wiper blade according to claim 1,
The wind receiving surface of the fin portion has a concave shape,
The wiper blade according to claim 1, wherein the restriction wall is formed to have a size that fills at least the concave portion of the wind receiving surface of the fin portion. The wiper blade according to claim 1 or 2,
The wiper blade according to claim 1, wherein the regulating wall has a plate shape along a width direction of the wiper blade. The wiper blade according to claim 1 or 2,
The wiper blade according to claim 1, wherein the regulation wall is curved toward the longitudinal direction one side of the traveling wind. In the wiper blade according to any one of claims 1 to 4,
A lever having a connecting portion for connecting to the distal end portion of the wiper arm, an arm portion extending from both sides in the longitudinal direction of the connecting portion, and a holding portion that is formed at the distal end portion of the arm portion and holds the blade rubber A follow-up end portion that includes a member and projects the blade rubber, which is mounted with a leaf spring member having the same length as the blade rubber, in the longitudinal direction from the holding portion of the lever member so as to follow the curvature of the wiping surface. In what constitutes
The wiper blade according to claim 1, wherein the fin portion having the regulating wall is provided at a trailing end portion of the blade rubber. The wiper blade according to claim 5, wherein
The wiper blade according to claim 1, wherein the arm portion of the lever member is provided with a fin portion that is continuous with the fin portion of the blade rubber.

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