JP2008126853A - Wiper blade - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wiper blade having a configuration enabling weight reduction and capable of securing excellent wiping performance even in winter by securely preventing the entry of snow etc. <P>SOLUTION: The wiper blade 10 is provided with a long blade body 14 having a groove 141 formed along the long direction on the lower face side and with blade rubber 11 having a head 11b stored in the groove 141, a wiping part 11a for wiping the wiping face S of a vehicle C and arms 11d, 11d arranged between the head 11b and the wiping part 11a and protruded to a direction orthogonal to the long direction. On both side edges at the lower face of the blade body 14, projections 142, 142 are extended along the long direction. Tips of the arms 11d abut on lower faces 14a between the projections 142 and the groove 141. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a wiper blade that is attached to the tip of a wiper arm of a vehicle and used to wipe a wiping surface such as a windshield.

  Conventionally, in order to wipe a wiping surface such as a windshield of a vehicle, it is widely known to use a wiper having a wiper blade that slides on the wiping surface (see Patent Documents 1 and 2).

  As such a wiper, a long spring plate member curved in a bow shape is applied to a long blade rubber for wiping the wiping surface, and the blade rubber is bent and attached to the blade body. A device that is connected to a wiper arm provided in a vehicle via an attachment means provided at an intermediate position is known (for example, see Patent Document 1).

  In the wiper blade configured in this way, the blade rubber comes into contact with the wiping surface with a uniform pressing force over the entire length due to the pressing force from the wiper arm, so that the blade rubber is moved along with the rotation of the wiper arm. The wiping surface can be wiped well by sliding on the wiping surface.

Patent Document 2 discloses that, in the case of snowfall in winter, a waterproof cover is provided to prevent the blade rubber from flexing due to snow adhering during the reciprocating motion of the wiper blade. A wiper blade capable of securing and sealing the blade rubber seal lip to the waterproof cover by elastic force is disclosed.
JP 2006-76464 A JP-A 63-98264

  However, in the wiper blade of Patent Document 2 described above, the force for bringing the waterproof cover and the seal lip into close contact is only the elastic force when the seal lip formed of rubber is deformed at the time of mounting, and the rubber is cured due to a temperature drop. In some cases, the adhesive force may be reduced due to deterioration or deterioration.

  In addition, when the structure is provided with a waterproof cover, the weight increases accordingly, and the burden on the wiper system such as the wiper motor and the wiper link increases.

  Therefore, an object of the present invention is to provide a wiper blade that ensures good wiping performance even in winter by reliably preventing intrusion of snow or the like with a structure that can be reduced in weight.

  In order to achieve the above object, a wiper blade according to the present invention includes an elongated blade body having a groove portion formed along the longitudinal direction on the lower surface side, a head housed in the groove portion, and a wiping surface of a vehicle. A wiper blade having a wiping portion for wiping and a blade rubber having an arm portion protruding in the direction perpendicular to the long length between the wiping portions, and the long edge on both side edges of the lower surface of the blade body. A protruding portion is extended along the direction, and the tip of the arm is in contact with the lower surface between the protruding portion and the groove.

  Here, it is preferable that the arm portion is formed of an elastic material in an inclined shape in which the tip is brought into contact with the lower surface and pushed downward when the blade rubber is attached to the blade body.

  The wiper blade of the present invention configured as described above has protrusions extending on both side edges of the lower surface of the blade body, and the blade rubber is disposed on the lower surface between the protrusion and the groove of the blade body. The tip of the arm is brought into contact.

  And even if a removed object such as snow that has accumulated on the wiping surface of the vehicle tries to intrude between the tip of the arm and the lower surface of the blade body from the lateral direction, which is parallel to the wiping surface, it is blocked by the ridges. . Further, even if the removal object enters from the lower side to the upper side, it is an action of a force in a direction of pressing the arm portion against the lower surface of the blade body, and therefore no gap can be formed between them.

  In this way, it is possible to reduce the weight by simply providing the protrusions, and it is possible to reliably prevent snow and the like from entering between the tip of the arm portion of the blade rubber and the blade body. Wiping performance is ensured.

  In addition, by forming the blade rubber into an inclined shape in which the tip of the arm part is elastically deformed by the lower surface of the blade body, even when the blade rubber is inclined during wiping and one arm part moves away from the lower surface of the blade body, The contact with the lower surface can be maintained by the restoring force of the arm.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 2 is an exploded perspective view for illustrating the configuration of the wiper blade 10 according to the present embodiment, and FIG. 3 shows a wiping surface S by the wiper blade 10 attached to the tip 20a of the wiper arm 20 of the vehicle C. It is a perspective view explaining the state which wipes off the windshield as.

  First, the overall configuration of the wiper provided with the wiper blade 10 according to the present embodiment will be described. A wiper arm 20 to which the wiper blade 10 is attached is connected to a wiper motor via a wiper link (not shown). It can be reciprocated along the wiping surface S by driving (see arrows G and B).

  When the wiper arm 20 is swung, the wiper blade 10 attached to the wiper arm 20 is moved from below the wiping surface S in a stationary posture so that the direction intersecting the longitudinal direction becomes the traveling direction. A reciprocating movement comprising an outward path G slid along the vehicle C along the upper and rear sides S and a return path B slid along the wiping surface S from the end of the outward path G to the lower front of the vehicle C. The wiping surface S is wiped off repeatedly.

  Further, as shown in FIG. 2, the wiper blade 10 includes a blade rubber 11 for wiping the wiping surface S and a vertebra as a spring plate member for bringing the blade rubber 11 into contact with the wiping surface S with a uniform pressing force. 12, a blade main body 14 that houses the upper portion of the blade rubber 11 and the vertebra 12, and attachment means for attaching them to the distal end portion 20 a of the wiper arm 20.

  The blade rubber 11 is formed in a long shape with an elastic rubber material that can slide without damaging the wiping surface S.

  Further, as shown in the cross-sectional view of FIG. 1, the blade rubber 11 includes a wiping portion 11a having a tongue-like cross-sectional view whose tip is in contact with the wiping surface S, and a wide head positioned above the wiping portion 11a. 11b, a neck portion 11c that is narrower than the head portion 11b that connects the wiping portion 11a and the head portion 11b, and arm portions 11d and 11d that protrude from both sides of the neck portion 11c in the long orthogonal direction. .

  Since this neck part 11c is narrower than the upper part of the wiping part 11a and the head part 11b, a recessed part is formed between the wiping part 11a and the head part 11b.

  The arm portions 11d and 11d are connected at the base to the neck portion 11c, and the tips thereof protrude obliquely upward therefrom. The arm portions 11d and 11d are formed in a shape as shown by a solid line in FIG. 4A. When the arm portions 11d and 11d are attached to the blade body 14, the tip is pushed down and elastically deformed into a shape as shown by a two-dot chain line. .

  On the other hand, the blade rubber 11 is a so-called neck reversal structure capable of bending near the neck portion 11c when reciprocating motion is reversed. That is, when the blade rubber 11 is reversed while receiving the urging force and pressed against the wiping surface S, in other words, when the sliding direction is switched to the opposite side, the neck portion 11c is bent and the wiping portion 11a is bent. Is an appropriate tilt angle with respect to the wiping surface S, so that the contact relationship of the wiping location 11e with the wiping surface S is appropriate.

  Further, at this time, one arm portion 11d is pressed against and supported by the lower surface portion 14a of the blade body 14, thereby suppressing excessive bending of the neck portion 11c and maintaining the tilt angle of the wiping portion 11a in an appropriate state. Is done.

  Further, as shown in FIG. 2, the vertebra 12 is formed in a long plate shape from a synthetic resin material or a metal material having elasticity, and has a shape curved like a bow in the long direction.

  In other words, the vertebra 12 has a function to disperse this force and equalize it when viewed in the longitudinal direction of the vertebra 12 when the central portion 12a of the vertebra 12 curved in a bow shape is pushed down to be flattened. .

  In addition, six holders 13 for attaching the blade rubber 11 to the vertical bra 12 are attached to the vertical bra 12.

  As shown in FIGS. 1 and 2, the holder 13 is processed so that both sides of the rectangular plate are folded back and folded into an L shape in two stages, and is formed in an inverted convex shape when viewed in cross section. In addition, an opening 13a is formed on the lower surface.

  Then, the head 11b of the blade rubber 11 is inserted into the space below the vertebra 12 of the holder 13 from the direction orthogonal to the paper surface of FIG. 1, and the neck 11c is passed through the opening 13a to project downward from the opening 13a. The blade rubber 11 can be supported by the holder 13.

  The blade body 14 that houses the vertebra 12 to which the blade rubber 11 is attached in this way is formed into an elongated shape slightly longer than the vertebra 12 by an elastic material such as a synthetic resin material, as shown in FIG. ing.

  A groove portion 141 is formed on the lower surface side of the blade body 14 along the longitudinal direction. As shown in FIG. 1, the groove 141 communicates with a lower opening 141b that is slightly wider than the width of the lower portion of the holder 13 that accommodates the head 11b of the blade rubber 11, and communicates with the lower opening 141b at the upper portion. And a wider fitting groove 141a than that formed.

  The fitting groove 141 a extends in the longitudinal direction of the blade body 14 so that the cross-sectional shape of the fitting groove 141 a is a width capable of sandwiching both side edges of the holder 13 of the vertebra 12.

  The blade body 14 according to the present embodiment has opposite bottom surface portions 14a and 14a formed on both sides of the groove portion 141 as both side edges in the width direction (longitudinal orthogonal direction) of the bottom surface, in other words, the bottom surface. On the side edge of the side, projecting ridges 142 and 142 projecting downward are formed.

  The downward protrusion amount of the protrusion 142 is formed so as to be substantially the same as or slightly larger than the thickness of the arm portion 11d of the blade rubber 1.

  Further, the side surface of the protrusion 142 on the groove 141 side is such that when the blade rubber 11 is attached to the blade body 14 as shown in FIG. It is formed in the position.

  By forming the blade rubber 11 and the blade body 14 as described above, the tip of the arm portion 11d is brought into contact with the lower surface portion 14a between the ridge portion 142 and the groove portion 141.

  Further, a mounting opening 14c is formed at the approximate center in the longitudinal direction of the blade body 14 so as to expose the central portion 12a of the attached vertebra 12 upward.

  Further, stoppers 15 are attached to both end portions 14b, 14b in the longitudinal direction of the blade body 14 so that the attached vertebra 12 does not fall off.

  On the other hand, attachment means to the wiper arm 20 is attached to the central portion 12a of the vertical bra 12 exposed from the attachment opening 14c of the blade body 14.

  As shown in FIG. 2, the attachment means mainly includes a spacer 16, a clip base 17 for sandwiching the spacer 16 from both sides, a clip 18, and a clip base cover 19.

  The spacer 16 has an open lower surface to form an insertion space for the vertebra 12, and a clip base 17 is attached to the spacer 16 in a state where the central portion 12 a is held.

  That is, the clip base 17 has a pair of opposing wall portions 17a and 17a facing each other with the spacer 16 interposed at both side edges of the spacer 16, and the interval between the pair of opposing wall portions 17a and 17a is fixed by a rivet 17b. By doing so, the spacer 16 is clamped.

  A clip 18 is attached to the rivet 17b so as to be rotatable about the rivet 17b.

  Further, the clip 18 is formed of a synthetic resin material, and a tip end portion 20a of a wiper arm 20 provided in the vehicle C is fixed.

  By sandwiching the both sides of the spacer 16 with the clip base 17 in this way, relative displacement between the clip base 17 and the spacer 16 is prevented. Further, in relation to the vertebra 12, both end surfaces of the spacer 16 attached to the central portion 12 a abut on the two holders 13, 13 adjacent to the attachment opening 14 c of the blade body 14, thereby The relative displacement between the spacer 16 and the vertebra 12 along the line is prevented.

  A clip base cover 19 is attached to the clip base 17.

  The clip base cover 19 is formed of a synthetic resin material, and is attached to the clip base 17 so as to cover the clip base 17 and the mounting opening 14c of the blade body 14.

  And the wiper blade 10 comprised as mentioned above is mounted | worn with the vehicle C by attaching the front-end | tip part 20a of the wiper arm 20 to the clip 18 which can be rotated from the outside of the clip base cover 19 (refer FIG. 3). ).

  Next, the operation of the wiper blade 10 of the present embodiment will be described.

  In the wiper blade 10 according to the present embodiment configured as described above, the protrusions 142 and 142 are extended on the side edges of the lower surface parts 14a and 14a of the blade body 14, and the protrusions 142 and 142 and The tips of the arm portions 11d and 11d of the blade rubber 11 are brought into contact with the lower surface portions 14a and 14a between the blade main body 14 and the groove portion 141, respectively.

  When a wiper motor (not shown) is driven to reciprocate the wiper arm 20, the wiper blade 10 reciprocates on the wiping surface S of the vehicle C as shown in FIG.

  At this time, if removed objects such as snow, rain, mud and the like are accumulated on the wiping surface S, the wiping portion 11a wipes away. However, when the amount increases, the blade body 14 also comes into contact with snow. Become.

  In particular, from the lateral direction (see FIG. 1) parallel to the wiping surface S, which overlaps with the direction of reciprocation, snow is pressed by the reaction force of the operating force of the wiper blade 10. Since the strip 142 can first contact and push away, snow does not enter from the lateral direction between the tip of the arm 11d and the lower surface 14a of the blade body 14.

  Since the protrusions 142 and 142 are provided on both side edges of the lower surface of the blade body 14, the snow can be surely pushed away during movement in either the forward path G or the return path B.

  Further, even if snow swells from the lower side on the wiping surface S side toward the upper side, the pressing force with which the tip of the arm portion 11d is pressed against the lower surface portion 14a increases. Can not.

  As described above, the protrusions 142 and 142 formed integrally with the blade body 14 are provided with a small increase in weight, and snow or the like is reliably provided between the tip of the arm portion 11 d of the blade rubber 11 and the blade body 14. Therefore, good wiping performance can be ensured even in winter.

  That is, once the snow is attached to the wiper blade 10, the portion freezes and the ice gradually enlarges, causing a wiping failure. On the other hand, in the present embodiment, it is possible to suppress the first stage with snow as much as possible, and thus it is possible to ensure good wiping performance.

  Further, even if the arm portion 11d becomes hard due to low temperature, deterioration, etc., and the contact force to the lower surface portion 14a is reduced, the configuration is such that the protruding portion 142 physically removes snow, so the blade rubber 11 Snow can be prevented from entering between the tip of the arm portion 11d and the blade body 14.

  Furthermore, with the structure of the wiper blade 10 according to the present embodiment, the neck rubber can be reversed without relying on the lip reversal at the tip of the wiping portion 11a, so that the blade rubber 11 can be securely adhered to the wiping surface S. And high wiping performance can be ensured.

  Further, as shown in FIG. 4 (a), the arms 11d and 11d of the present embodiment are at a position where the tip is higher than the mounting state indicated by a two-dot chain line at the time of molding, and the blade main body 14 has a vertical rib. 12, it is pushed down by the lower surface portions 14 a, 14 a on both sides of the groove portion 141 to be in the state of a two-dot chain line.

  In this state, when the wiper blade 10 is attached to the tip 20a of the wiper arm 20 and the wiper arm 20 is swung, the wiper blade 10 reciprocates on the wiping surface S.

  When the reciprocating motion is reversed, the blade rubber 11 is neck-reversed, and the wiping portion 11a is tilted as shown in FIG. 4B (see the central axis X). In such a state, the arm portion 11d on the wiping location 11e side is pushed up, and the opposite arm portion 11d is pushed down to the wiping surface S side.

  However, since the arm portion 11d is mounted by elastically deforming an elastic material such as rubber, the tip of the arm portion 11d on the side pushed down by the restoring force is lifted and comes into contact with the lower surface portion 14a. The maintained state is maintained.

  For this reason, even if the neck is reversed, a gap is not generated between the lower surface portion 14a of the blade body 14 and the tip of the arm portion 11, and removed objects such as snow cannot enter, so that high wiping performance is maintained. The

  Although the best embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes that do not depart from the gist of the present invention are possible. Are included in the present invention.

  For example, in the above-described embodiment, the spacer 16 is attached to the clip base 17 and attached to the vertebra 12. However, the present invention is not limited to this. For example, the clip base 17 may directly hold the vertebra 12. Good.

  Further, the vertebra 12 need only be curved in the longitudinal direction so as to disperse the force when the central portion is pushed down and flattened. For example, it is embedded in the head of the blade rubber along the longitudinal direction. It may be what is.

  Further, in the above embodiment, the wiper blade 10 having a so-called flat type structure has been described. However, the present invention is not limited to this, and the present invention can also be applied to a tournament type wiper blade.

  And in the said embodiment, although the wiping surface S was comprised by the windshield of the vehicle C, it is not limited to this, A rear glass may be sufficient.

It is sectional drawing explaining the structure of the wiper blade of the best embodiment of this invention. It is a disassembled perspective view explaining the structure of the wiper blade of the best embodiment of this invention. 1 is a schematic perspective view showing a vehicle equipped with a wiper blade according to a best embodiment of the present invention. (A) is sectional drawing explaining the shape of the arm part of the blade rubber before and behind mounting | wearing, (b) is sectional drawing explaining the state of the wiper blade at the time of neck inversion.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Wiper blade 11 Blade rubber 11a Wiping part 11b Head part 11d Arm part 14 Blade body 14a Lower surface part (lower surface)
141 groove 142 ridge S wiping surface C vehicle

Claims (2)

An elongated blade body having a groove portion formed along the longitudinal direction on the lower surface side, a head housed in the groove portion and a wiping portion for wiping the wiping surface of the vehicle, and the longitudinal orthogonal direction between them A wiper blade having a blade rubber having an arm portion protruding to
On both side edges of the lower surface of the blade body, a ridge portion extends along the longitudinal direction, and the tip of the arm portion abuts on the lower surface between the ridge portion and the groove portion. A wiper blade characterized by that. The said arm part is shape | molded by the elastic material in the inclined shape by which the said front-end | tip contact | abuts the said lower surface and is pushed down when the said blade rubber is mounted | worn with the said blade main body, It is characterized by the above-mentioned. The wiper blade described.

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