JP2006290220A - Wiper blade - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wiper blade capable of preventing a water drop from being drawn to a back surface side position of a wiper viewed in a slide direction. <P>SOLUTION: The wiper blade 10 is provided with a refill 11 sliding a wiping surface S and having a lengthy shape along the wiping surface S; a lengthy vertebra body part 12 for supporting the refill 11 so as to give urging force to the refill 11 such that the refill 11 is uniformly abutted on the wiping surface S; and a fin 16 for receiving a flow of air accompanying with the slide of the refill 11 and provided on the vertebra body part 12 for assisting urging to the refill 11 by the vertebra body part 12. A through hole 23 for allowing passing of the air received accompanying with the slide of the refill 11 is provided on the fin 16. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wiper blade having a configuration in which a refill is attached to a lower surface side of a long-shaped vertebra main body.

  Conventionally, for example, it is widely known to use a wiper to wipe a wiping surface such as a window surface of a windshield of a vehicle. As such a wiper, a flat wiper constructed by attaching a refill to a vertebra body body made of an elastic member has been devised (see, for example, cited document 1).

  FIG. 5 is a perspective view showing an example of such a flat wiper 1. The flat wiper 1 includes a long refill 2, a pair of spring rails 3, two holders 4 installed at both ends of the refill 2, and a clip base 5 provided near the center of the refill 2. , Two elongated fins 6 provided on the upper side of both spring rails 3. Both holders 4 hold both spring rails 3 so that the refill 2 is interposed therebetween. The clip base 5 holds the two spring rails 3 so that the refill 2 is interposed between them, like the holder 4. For this reason, the refill 2 is sandwiched between the two spring rails 3. The clip base 5 is connected to an end of a wiper arm (not shown) provided in the vehicle. The wiper arm urges the flat wiper 1 toward the wiping surface S (see FIG. 6). The two fins 6 are installed along the two spring rails 3 so as to sandwich the clip base 5 at an intermediate position seen in the longitudinal direction of the refill 2.

In this flat wiper 1, both spring rails 3 receive a biasing force from the wiper arm, and the two feeler rails 3 are attached with the refill 2 so that the refill 2 comes into uniform contact with the wiping surface S by its elastic action. It is fast. For this reason, both spring rails 3 have a function as a vertebra body part. The flat wiper 1 wipes the wiping surface S by sliding on the wiping surface S as the wiper arm swings. At this time, the fins 6 urge the refill 2 toward the wiping surface S by receiving a pressing force from the air while rectifying the flow of air relatively generated around the flat wiper 1 as the flat wiper 1 slides. The urging of the refill 2 by both spring rails 3 is assisted.
Special table 2001-500091 gazette

  However, as shown in FIG. 6, when viewed in the sliding direction of the flat wiper 1, a pressure difference occurs between the front and rear of both fins 6. When the flat wiper 1 slides to wipe the wiping surface S (see arrow A in FIG. 6), an air flow (see arrow B in FIG. 6) is formed along the upper surfaces of the fins 6. caused by. Due to this air flow, the air pressure at the rear surface side position R of both fins 6 becomes lower than the air pressure around it. This pressure difference causes, for example, a problem that water droplets or the like removed from the wiping surface S by wiping the flat wiper 1 are attracted to the rear surface side position R, and the water droplets or the like adhere to the wiping surface S again.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a wiper blade that can prevent water droplets from being attracted to the position on the back side of the wiper when viewed in the sliding direction.

  In order to solve the above-described problem, the wiper blade according to claim 1 is configured such that a refill that slides on a wiping surface and has a long shape along the wiping surface, and the refill abuts against the wiping surface uniformly. A long-shaped vertebra main body for supporting the refill so as to apply a biasing force to the refill, and assisting the urging of the refill by the vertebra main body by receiving an air flow accompanying the sliding of the refill. Therefore, a wiper blade comprising a fin provided in the vertebra body body, wherein the fin is provided with a through-hole that allows passage of air received as the refill slides. And

  The wiper blade according to claim 2, wherein the wiper blade has a long shape along the wiping surface and has a wiping portion at the lower end that slides on the wiping surface, and makes the wiping portion contact the wiping surface uniformly. An elongated vertebra main body that supports the upper end of the refill for applying an urging force to the refill, and is provided on the upper surface of the vertebra main body, extends along the extending direction of the refill, and It is a wiper blade provided with the fin which stands | starts up along the up-down direction of a refill, The said fin is provided with the through-hole which penetrates the said fin along the sliding direction of the said refill.

  The wiper blade according to claim 3 is the wiper blade according to claim 1 or 2, wherein the through hole is provided at a plurality of locations when viewed in the extending direction of the fin. And

  According to the present invention, a part of the air received by the fin flows into the back side position of the fin as viewed in the sliding direction of the wiper blade through the through hole, so that the back side position of the fin is lower than the surrounding area. Can be suppressed. For this reason, it is possible to prevent water droplets from being drawn to the rear side position in the sliding direction of the wiper.

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

  FIG. 1 is a schematic perspective view showing the wiper blade 10 according to the present embodiment expanded on each component. The wiper blade 10 is provided in the vehicle for wiping a wiping surface S (see FIG. 4B) made of a vehicle windshield or the like (not shown). The wiper blade 10 includes a refill 11, a vertebra body 12, a plurality of holders 13, a clip base 14, a clip base cover 15, two fins 16, two fin caps 17, and an impact absorbing member 18. And.

  The refill 11 is formed of an elastic member that can slide the wiping surface S without damaging the wiping surface S, and has a long shape. As shown in FIG. 4B, the refill 11 includes a rubber main body portion 11a that is in contact with the wiping surface S, a head portion 11b that is located above the rubber main body portion 11a, and a rubber main body portion 11a and a head portion 11b. And a neck portion 11c connecting the two. The cross-sectional shape of the rubber main body portion 11a has an inverted triangular shape, and the cross-sectional shape of the head portion 11b has a rectangular shape. The neck portion 11c defines a recess between the rubber main body portion 11a and the head portion 11b. The rubber body 11a is in contact with the wiping surface S at the lower wiping portion 11d, and the wiping portion 11d slides on the wiping surface S.

  The vertebra main body 12 is made of a long metal plate having elasticity, and has a shape curved like a bow in the long direction. The vertebra body 12 is formed flat by compressing a cylindrical elastic metal rod in the radial direction. By such processing, it becomes possible to form the vertebra main body 12 having a smooth cross-sectional shape with no corners, and when the central portion of the vertebra main body 12 curved in a bow shape is pushed down to be flattened. It becomes easy to equalize the urging force applied to the lower surface of the vertebra main body 12. A plurality of holders 13 are fixed (arranged) to the vertebra main body 12 in advance.

  As shown in FIG. 2, the holder 13 is processed so that both side portions of the rectangular plate material are folded into an L shape in two stages, and has a reverse convex shape when viewed in cross section. A notch 19 is formed in the lower wall portion 13 a of the holder 13, and a pair of holding claws 20 are formed at the end of the upper wall portion 13 b of the holder 13.

  The notch 19 extends along the extending direction of the vertebra main body 12 while maintaining a constant interval. The holding claw 20 is formed so as to rise from the end of the upper wall portion 13b of the inverted convex shape portion, and is constituted by a pair of claws having a Γ shape (a bowl shape). As will be described later, the holding claws 20 can be engaged with holding pieces 25 of the fins 16.

  A first space 21 located above the holder 13 and a second space 22 located below the first space 21 are defined inside the holder 13. The first space 21 has a rectangular parallelepiped shape, has a width and a height that are necessary for inserting the vertebra body 12, and allows the vertebra body 12 to be received. The second space 22 has a rectangular parallelepiped shape that is narrower than the first space 21, and the head 11b in a state where the shock absorbing member 18 is placed on the head 11b of the refill 11 (see FIG. 4B). ) Is secured in the width and height dimensions necessary for insertion. The second space 22 has a structure in which the refill 11 does not fall out of the holder 13 by the peripheral edge portions 19 a of the notch 19 sandwiching the neck portion 11 c of the refill 11 when the head portion 11 b is inserted. In this embodiment, as shown in FIG. 1, ten holders 13 are used, and are arranged on the vertebra main body 12 so as to maintain an equal interval along the extending direction of the vertebra main body 12. Yes. Similar to the holder 13, the clip base 14 is attached in advance to the center position of the vertebra body 12 seen in the extending direction.

  The clip base 14 can clamp the vertebra main body 12 from both sides thereof, and can be attached to the vertebra main body 12 by this. The clip base 14 has a pair of opposing wall portions 14 a that are located at both side edges of the vertebra main body 12 and are opposed to each other with the vertebra main body 12 interposed therebetween. A shaft portion (not shown) is installed on the pair of opposing wall portions 14a, and a wiper is fixed to the end portion of a wiper arm (not shown) provided on the vehicle. The blade 10 can be attached to the vehicle. A clip base cover 15 is attached to the clip base 14.

  The clip base cover 15 is made of a plastic material, and the corners are chamfered. The clip base cover 15 is attached to the clip base 14 so as to cover the ends of the clip base 14 and the two fins 16 (see FIG. 4A).

  Each of the two fins 16 has an elongated shape that is approximately half the length of the vertebra main body 12 and is formed of an elastic body such as rubber. The two fins 16 can be installed in the refill 11 along the extending direction so as to cover the entire refill 11 with the clip base 14 interposed at the center of the refill 11. When the fins 16 are installed on the refill 11, the two outer surfaces 16a and 16b perpendicular to the sliding direction of the wiper blade 10 are formed to have different inclinations (see FIG. 3B). ). As shown in FIG. 3B, the outer side surface 16a is formed with a gentler slope than the outer side surface 16b. When the wiper blade 10 starts swinging from its stop position when the wiper blade 10 is installed in a vehicle (not shown), each fin 16 is such that the outer surface 16a is first positioned on the wiping surface S side. Installed in the refill 11. A plurality of through holes 23 are formed in the fin 16, and each through hole 23 will be described later.

  A recess 24 is formed in the bottom surface of the fin 16. The recess 24 has an inverted convex shape whose cross-sectional shape matches the shape of the holder 13, and extends along the longitudinal direction of the fin 16. The recess 24 is opened to the lower surface of the fin 16 through an opening 24a. A holding piece 25 is formed at the center of the recess 24. Similar to the recess 24, the holding piece 25 extends along the longitudinal direction of the fin 16 and has an inverted T shape so that the cross-sectional shape can be engaged with the holding claw 20 of the holder 13. Yes. One end of each fin 16 is covered with a fin cap 17.

  Both fin caps 17 have storage spaces that can receive the end portions of the refill 11 and the end portions of the fins 16 that are mounted on the vertebra main body 12, and can be installed at both ends of the vertebra main body 12. is there. An impact absorbing member 18 can be placed between the vertebra main body 12 and the refill 11.

  The shock absorbing member 18 has a long shape and is formed of an elastic body such as rubber. The impact absorbing member 18 has a long dimension and a width dimension substantially equal to the vertebra main body 12. The impact absorbing member 18 absorbs the vibration of the refill 11 that vibrates due to the friction between the wiping portion 11 d and the wiping surface S when the wiper blade 10 is wiped, and makes it difficult to propagate the vibration of the refill 11 to the wiping surface S. For this reason, the reversal sound accompanying wiping reversal at the time of wiper use is controlled.

  In the wiper blade 10 according to the present invention, a plurality of through holes 23 are provided. Each through-hole 23 is formed in the fin 16 as described above. Each through-hole 23 has an axis line along the sliding direction of the wiper blade 10 when the fin 16 is installed in the refill 11 and is open to both outer side surfaces 16a and 16b. In the present embodiment, four through holes 23 are provided in each fin 16, and eight through holes 23 are provided when viewed as a whole of the wiper blade 10. The through holes 23 are equally spaced from each other along the extending direction of the fins 16.

  Next, a procedure for attaching the shock absorbing member 18, the refill 11 and the fin 16 to the vertebra main body 12 to which the clip base 14 and the holder 13 are fixed in advance will be described.

  First, as shown in FIG. 4B, the shock absorbing member 18 is placed on the upper surface of the head 11b of the refill 11 along the longitudinal direction thereof. At this time, high stability can be obtained by fixing the shock absorbing member 18 to the head 11b by adhesion, sticking, or the like.

  The head portion 11 b constituting the upper end portion of the refill 11 on which the shock absorbing member 18 is placed is inserted into the second space 22 of the holder 13. At this time, the shock absorbing member 18 and the refill 11 can be attached to the vertebra body 12 by sequentially inserting the holders 13 installed on the end side of the vertebra body 12.

  Next, the fins 16 are attached to the vertebra main body 12 to which the refill 11, each holder 13, and the impact absorbing member 18 are attached. The vertical bra body 12 is housed in the recess 24 of the fin 16, and the holding piece 25 formed there is inserted into the holding claw 20 of each holder 13 and engaged therewith. Thereby, the fin 16 can be attached to the upper surface of the vertebra body part 12 through the holder 13 (see FIG. 4A).

  When the holding piece 25 of the fin 16 and the holding claw 20 of the holder 13 are engaged and the fin 16 is installed in the holder 13, the wiping portion 11 d of the refill 11 is exposed from the opening 24 a of the recess 24 of the fin 16. Thus, the vertebra main body 12, the holder 13 and the shock absorbing member 18 are accommodated in the recess 24.

  The wiper blade 10 is given a biasing force toward the wiping surface S by a wiper arm (not shown) attached to a shaft portion (not shown) of the clip base 14. This urging force is evenly transmitted to the refill 11 by the elastic action of the vertebra main body 12. For this reason, the wiping portion 11 d of the refill 11 is in contact with the wiping surface S with an equal pressing force. The wiper blade 10 can wipe the wiping surface S by the wiping portion 11d sliding on the wiping surface S as the wiper arm swings.

  When the wiper blade 10 slides in this way (see arrow C in FIG. 4B), the fin 16 causes an air flow along the outer surface 16a (see arrow D in FIG. 4B). Air is smoothly flowed to the position on the back side of the fin 16 as viewed from the sliding direction. At this time, since the fin 16 extends along the extending direction of the wiper blade 10, it is possible to apply a uniform pressing force to the refill 11 by receiving a pressing force from the air, and the wiping surface S. Assist the urging force applied to the

  A part of the air flow along the outer surface 16a passes through the through hole 23 (see arrow E in FIG. 4B). Thereby, air flows into the back side position of the fin 16 viewed in the sliding direction, and the back side position of the fin 16 viewed in the sliding direction is suppressed from becoming a low pressure compared to the surroundings.

According to this wiper blade 10, the following effects can be obtained.
(1) The through hole 23 allows air to actively flow to the position on the back side of the fin 16 as viewed in the sliding direction of the wiper blade 10, so that the position on the back side of the fin 16 viewed in the sliding direction is It can suppress that it becomes a low voltage | pressure compared with the circumference | surroundings. For this reason, for example, it is possible to prevent water droplets or the like removed from the wiping surface S due to the sliding of the wiper blade 10 from being attracted to the position on the back side of the fin 16 and adhering to the wiping surface S again.
(2) Since the plurality of through-holes 23 are provided so as to keep an equal interval along the extending direction of the fin 16, air is allowed to actively flow to the position on the back side over the entire length of the fin 16. Can do. For this reason, it can prevent that the back side position of the fin 16 becomes low pressure over the full length of the wiper blade 10.
(3) Since the fins 16 are provided with the plurality of through holes 23, the air resistance received by the wiper blade 10 with the swinging can be reduced. This is particularly effective when the vehicle is traveling at high speed.
(4) Since the plurality of through holes 23 are provided in the fin 16, the wiper blade 10 can be reduced in weight.

  The wiper blade according to the present invention has been described above with reference to the drawings. However, the wiper blade according to the present invention is not limited to the above-described one, and penetrates through the fins along the sliding direction of the wiper blade. It is only necessary that a hole is provided, and the opening shape, size, and number of the through holes can be changed as appropriate. At this time, it is desirable to set the desired opening shape, size, and number in consideration of the strength of the fin, the amount of air flowing to the back side position of the fin, the pressing force by the air received by the fin, and the like.

  The fin provided with the through hole rectifies the flow of air around the wiper blade as the wiper blade slides, and the wiping part of the refill is evenly applied to the wiping surface by receiving the pressing force from the air. What is necessary is just to be able to urge a refill so that it may contact, and it is not limited to the shape mentioned above.

  In addition to fixing the shock absorbing member 18 to the upper surface of the head portion 11b of the refill 11, for example, before the clip base 14 and the holder 13 are fixed to the vertical bar main body portion 12, the lower surface of the vertical bar main body portion 12 is previously bonded and pasted. It may be fixed by.

It is an expansion perspective view showing the wiper blade concerning an embodiment of the invention. It is a perspective view which shows a holder. It is a figure which shows a fin, Comprising: (a) is the perspective view, (b) is sectional drawing obtained along the II-II line | wire shown to (a). It is a figure which shows the wiper blade of FIG. 1, Comprising: (a) is the perspective view, (b) is sectional drawing obtained along the III-III line | wire shown to (a). It is a perspective view which shows the conventional flat wiper. It is sectional drawing obtained along the II line | wire shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Wiper blade 11 Refill 11d Wiping part 12 Vertibra main-body part 16 Fin 23 Through-hole S Wiping surface

Claims (3)

A refill that slides on the wiping surface and exhibits a long shape along the wiping surface, and a long support that supports the refill so as to apply a biasing force to the refill so that the refill contacts the wiping surface uniformly. A wiper blade comprising: a shaped vertebra body body; and a fin provided on the vertebra body body to assist the biasing of the refill by the vertebra body body by receiving an air flow accompanying the sliding of the refill. There,
The wiper blade according to claim 1, wherein the fin is provided with a through hole that allows passage of air received as the refill slides. To provide the refill with a refill having a long shape along the wiping surface and having a wiping portion at the lower end that slides on the wiping surface, and an urging force that causes the wiping portion to uniformly contact the wiping surface. An elongated vertebra main body supporting the upper end of the refill; and a fin provided on the upper surface of the vertebra main body, extending along the extending direction of the refill, and rising along the vertical direction of the refill. A wiper blade comprising:
The wiper blade according to claim 1, wherein the fin is provided with a through-hole penetrating the fin along a sliding direction of the refill.   The wiper blade according to claim 1 or 2, wherein the through hole is provided at a plurality of locations when viewed in the extending direction of the fin.

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