JP4641915B2 - Wiper blade - Google Patents

Description

  The present invention relates to a wiper blade for wiping a windshield of a vehicle.

  For vehicles such as passenger cars, buses, trucks, etc., wipe off deposits such as rain, snow, insects, and muddy water splashed by vehicles traveling in front of the windshield, such as windshield and rear windshield. A wiper device for securing the driver's field of view is installed. The wiper device has a wiper arm that is swingably attached to the vehicle body, and a wiper blade that is attached to the tip of the wiper arm. It moves and wipes off the deposits attached to the wind glass.

  As such a wiper blade, one having a rubber holder swingably attached to the tip of the wiper arm and a rubber blade rubber held by the rubber holder is known, in order to improve wiping performance. In addition, it has a leaf spring member also called a vertebra that presses the blade rubber against the wind glass by being incorporated in the blade rubber, and a fin as a wind receiving portion that presses the blade rubber toward the wind glass when receiving wind Things are known.

As an example, Patent Document 1 discloses a blade rubber in which a plate spring member called a backing is incorporated, and a wiper blade having fins. The blade rubber is formed by the spring force of the backing and the wind wind force received by the fins. It is supposed to be pressed against the wind glass. As another example, Patent Document 2 discloses a wiper blade in which fins are provided on each of a blade lever and a lever yoke.
JP 2005-22632 A Japanese Utility Model Publication No. 7-40315

  In order to swingably attach the wiper blade to the tip of the wiper arm, a mounting portion having a swing shaft is provided on either the tip of the wiper arm or the wiper blade, and a mounting portion having a shaft hole is provided on the other side. There is known one in which a swing shaft is fixed to a hole (for example, see Patent Documents 1 and 2). In the wiper blades disclosed in Patent Documents 1 and 2, the attachment portion provided on the wiper blade side is provided on the top wall surface of the member corresponding to the rubber holder, that is, on the opposite surface of the surface facing the window glass. ing.

  However, if the attachment portion is provided on the top wall surface of the rubber holder, the wiper blade protrudes in the height direction by the height of the attachment portion, thereby obstructing the driver's view. In addition to this, even if the fins are provided over the entire length of the rubber holder as disclosed in Patent Documents 1 and 2, the mounting portion provided on the top wall surface of the rubber holder also becomes an obstacle and the fins are provided over the entire length. It cannot be provided, and it is difficult to improve the wiping property. Further, when the wiper blade is swung by the wiper arm when the wind glass is wiped, and the longitudinal direction of the wiper blade is tilted from the vehicle width direction toward the vehicle front-rear direction, the traveling wind flowing along the wind glass along the fins is generated. As a result, the traveling wind that collides with the mounting portion provided on the top wall surface is increased and the airflow is likely to be disturbed, and the wiper blade may be lifted to lower the wiping property.

  The objective of this invention is providing the wiper blade which can aim at the improvement of wiping property while expanding a driver | operator's visual field.

  The wiper blade of the present invention is a wiper blade having a rubber holder attached to a wiper arm that is swingably mounted on a vehicle, and a blade rubber that is held by the rubber holder and wipes the window glass of the vehicle. A mounting portion to be mounted on the wiper arm is provided on a front wall surface of the rubber holder disposed on the front side of the vehicle, and a ceiling wall surface of the rubber holder is disposed on the rear side of the vehicle from the front wall surface. A fin that is inclined upward toward the rear wall surface is provided over the entire length of the rubber holder.

  The wiper blade of the present invention is characterized in that a recess extending in the longitudinal direction of the rubber holder is formed between the attachment portion and the fin.

  In the wiper blade of the present invention, the front wall surface of the mounting portion disposed on the front side of the vehicle is inclined toward the rear wall surface of the mounting portion disposed on the rear side of the vehicle. A wind receiving part is provided along the longitudinal direction of the rubber holder.

  The wiper blade of the present invention is characterized in that the height of the fin from the surface of the window glass is higher than the height of the mounting portion side wind receiving portion.

  In the wiper blade of the present invention, a front wall side wind receiving portion inclined upward toward the rear wall surface of the rubber holder is provided on the front wall surface of the rubber holder along the longitudinal direction of the rubber holder. It is characterized by.

  The wiper blade of the present invention is provided with a cover that is attached to an end portion of the rubber holder and covers the end portion of the blade rubber, and from the front wall surface of the cover disposed on the front side of the vehicle to the rear side of the vehicle The cover side wind receiving part which inclines upward toward the rear wall surface arrange | positioned in is provided.

  According to the present invention, by providing the attachment portion attached to the wiper arm on the front wall surface of the rubber holder, the dimension of the wiper blade in the height direction can be suppressed, and the driver's field of view can be widened. In addition to this, fins as wind receiving portions can be provided over the entire length along the longitudinal direction of the rubber holder, and the area of the wind receiving portion can be increased, so that the pressing force of the blade rubber against the wind glass is improved. It is possible to improve the wiping property. If a sufficient pressing force has already been secured by providing the fins over the entire length of the rubber holder, the size of the fins in the height direction is reduced, that is, the inclination angle of the fins is reduced to reduce the driver's view. It can also be expanded.

  According to the present invention, even when the longitudinal direction of the wiper blade is inclined from the vehicle width direction to the vehicle front-rear direction by swinging the wiper blade when wiping the wind glass, the concave portion is formed. The traveling wind that flows along the longitudinal direction of the vehicle flows rearward through the recess and is less likely to disturb the airflow due to collision with the mounting portion, so that the wiper blade can be prevented from lifting and the wiping performance can be improved. Can do.

  According to the present invention, by providing the attachment portion side wind receiving portion on the front wall surface of the attachment portion, the area of the wind receiving portion can be increased, and the pressing force of the blade rubber against the wind glass, that is, the improvement of wiping property can be improved. Can be planned.

  According to the present invention, by making the height of the fin from the surface of the wind glass higher than the height of the attachment portion side wind receiving portion, the fins receive the wind flowing behind the vehicle along the attachment portion side wind receiving portion. It is possible to improve the pressing force of the blade rubber against the wind glass, that is, to improve the wiping property.

  According to the present invention, by providing the front wall side wind receiving portion on the front wall surface of the rubber holder, it is possible to increase the area of the wind receiving portion, and to improve the pressing force of the blade rubber against the wind glass, that is, to improve the wiping property. Can be planned.

  According to the present invention, by providing the cover-side wind receiving portion on the cover, the area of the wind receiving portion can be increased, and the pressing force of the blade rubber against the window glass, that is, the wiping property can be improved.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a perspective view showing a wiper blade according to an embodiment of the present invention. The wiper blade 10 shown in FIG. 1 is rain attached to a front windshield of a vehicle (hereinafter abbreviated as “wind glass”). It is mounted on the vehicle in order to wipe off deposits such as snow, insects, and muddy water splashed by the vehicle traveling in front of the vehicle to ensure the driver's view.

  The wiper blade 10 includes a rubber holder 12 that is swingably attached to the tip of a wiper arm 11 that is swingably supported by the vehicle body, and a blade rubber 13 that is held by the rubber holder 12. 13 is in elastic contact with the window glass (not shown) by applying a pressing force of the wiper arm 11 through the rubber holder 12. The wiper arm 11 is swingably mounted on the vehicle. When the wiper arm 11 is swung by a driving force of a wiper motor (not shown), the wiper blade 10 swings on the surface of the wind glass and adheres to the wind glass. Wipe off the attached deposits.

  2 is a cross-sectional view taken along line AA shown in FIG. 1, and FIG. 3 is a cross-sectional view taken along line BB shown in FIG.

  The blade rubber 13 is made of an elastic material such as natural rubber or synthetic rubber. As shown in FIGS. 2 and 3, the head portion 13a, the lip portion 13b that contacts the window glass, the head portion 13a, and the lip portion. It is formed in a substantially bar shape with a uniform cross section in the longitudinal direction, which includes a connecting portion 13c for connecting 13b. The lip portion 13b is connected to the connecting portion 13c via the connecting portion 13c and a neck portion 13d formed with a narrower width in the wiping direction than the lip portion 13b, whereby the lip portion 13b is connected to the head portion 13a and the connecting portion. It can be tilted in the wiping direction with respect to 13c.

  On both side portions of the head portion 13a in the wiping direction, mounting grooves 13e that are recessed in the wiping direction are formed. Each of the mounting grooves 13e extends in the longitudinal direction so as to reach the other end from the one end in the longitudinal direction of the head portion 13a. The mounting grooves 13e are separated from each other by the partition wall portion 13f. They are arranged side by side in the wiping direction. A leaf spring member 14 called a vertebra is incorporated in the mounting grooves 13e.

  The plate spring member 14 is formed into a flat plate having a length similar to that of the blade rubber 13 by punching a plate material such as a steel plate, and is elastically deformable in a direction perpendicular to the window glass. Therefore, the blade rubber 13 in which the leaf spring member 14 is incorporated is elastically deformable integrally with the leaf spring member 14 in a direction perpendicular to the window glass, that is, a direction in which the degree of curvature with respect to the glass surface is changed. Further, the leaf spring member 14 is naturally curved in a direction perpendicular to the wind glass in a natural state, so that the blade rubber 13 in which the leaf spring member 14 is incorporated is also made from the wind glass. In the separated state, it is curved more strongly than the wind glass.

  In the present embodiment, the leaf spring member 14 formed of a steel plate is used. However, the present invention is not limited to this. For example, a leaf spring member formed of a hard resin or the like is used in a direction perpendicular to the window glass. As long as it can be elastically deformed, a leaf spring member made of another material may be used.

  The rubber holder 12 is formed of a resin material into a U-shaped cross section having a top wall portion 12 a and a pair of side wall portions 12 b, and its length dimension is about half that of the blade rubber 13. As shown in FIG. 1, a mounting portion 15 is provided at a substantially intermediate portion in the longitudinal direction of the top wall portion 12 a, and the rubber holder 12 is attached to the tip of the wiper arm 11 at the mounting portion 15.

  The mounting portion 15 is provided on the front wall surface 12c of the rubber holder 12 that is disposed on the front side of the vehicle when the wiper blade 10 is mounted on the vehicle, that is, at a position away from the vehicle interior. Conventionally, when the attachment portion is provided on the top wall surface 12d of the rubber holder 12, there has been a problem that the wiper blade protrudes in the height direction by the height of the attachment portion. Since 15 is provided on the front wall surface 12c of the rubber holder 12, the dimension of the wiper blade 10 in the height direction can be suppressed, and the driver's view can be kept good.

  As shown in FIG. 1, a holding portion 16 a is provided at one end in the longitudinal direction of the rubber holder 12, and a holding portion 16 b is provided at the other end in the longitudinal direction of the rubber holder 12.

  As shown in FIGS. 2 and 3, the holding portion 16 a has a pair of holding claws 17 each formed integrally with the side wall portion 12 b, and these holding claws 17 are arranged in the longitudinal direction of the blade rubber 13. It is formed in the shape of a rectangular cross section protruding from the side wall portion 12b in a direction perpendicular to and parallel to the wiping direction. On the other hand, between the head portion 13a and the lip portion 13b of the blade rubber 13, a holding groove 13h defined by the arm portion 13g and the head portion 13a formed in the connecting portion 13c is formed extending in the longitudinal direction. Each holding claw 17 is engaged with a corresponding holding groove 13h.

  As shown in FIG. 3, the head portion 13a of the blade rubber 13 is sandwiched between the holding claws 17, the top wall portion 12a, and both side wall portions 12b, whereby the head portion 13a is held by the holding portion 16a. Yes.

  The holding structure of the blade rubber 13 in the holding portion 16b is the same as the holding structure of the blade rubber 13 in the holding portion 16a described above, and detailed description thereof is omitted. In other words, the holding portion 16b is also provided with holding claws (not shown) similar to the holding claws 17, so that the head portion 13a of the blade rubber 13 has a holding claw, a top wall portion 12a, and both side wall portions 12b. It is sandwiched between and held by the holding portion 16b.

  As described above, in the wiper blade 10, the blade rubber 13 is held at two points of the holding portions 16 a and 16 b provided at both ends of the rubber holder 12. Accordingly, when a pressing force from the wiper arm 11 is applied to the rubber holder 12 via the attachment portion 15, the pressing force is applied to the blade rubber 13 from both ends of the rubber holder 12, whereby the blade rubber 13 is elastically pressed. In contact with the wind glass. In each holding portion 16a, 16b, the mounting groove 13e of the head portion 13a is closed by the side wall portion 12b of the rubber holder 12, whereby each leaf spring member 14 mounted in the mounting groove 13e is held in the mounting groove 13e. Is done.

  As shown in FIG. 1, resin caps 19 are attached to both tip portions of the blade rubber 13, and the tip portion of the leaf spring member 14 is covered by the cap 19 with the cap 19 covering the tip portion of the blade rubber 13. 13e is held.

  Fins 20 as wind receiving portions are provided along the longitudinal direction of the rubber holder 12 on the top wall surface 12d of the rubber holder 12, that is, the surface opposite to the surface facing the window glass. The fin 20 is inclined upward from the front wall surface 12c toward the rear wall surface 12f disposed on the rear side of the vehicle. When the fin 20 receives wind, the blade rubber 13 is pressed against the wind glass by the wind force. As a result, the adhesion between the blade rubber 13 and the window glass increases, and the wiping property can be improved.

  As described above, since the attachment portion 15 of the wiper blade 10 is provided on the front wall surface 12c of the rubber holder 12, the fins 20 can be provided over the entire length of the rubber holder 12, as shown in FIGS. . As a result, the area of the wind receiving portion increases, so that the blade rubber 13 is more strongly pressed against the wind glass, or if the pressing force is already sufficient, the height direction dimension of the fin 20 is reduced, that is, the fin The driver's field of view can be expanded by reducing the inclination angle of 20.

  On the front wall surface 15a of the mounting portion 15 disposed on the front side of the vehicle, a mounting portion side wind receiving portion 21 that is inclined upward toward the rear wall surface 15b of the mounting portion 15 disposed on the rear side of the vehicle is a rubber holder. The blade rubber 13 is pressed toward the window glass when the mounting portion side wind receiving portion 21 receives wind. Thereby, since the area of a wind-receiving part increases, the blade rubber 13 can be pressed more strongly with respect to a wind glass. Further, in the present embodiment, the height of the fin 20 from the window glass is made higher than the height of the attachment portion side wind receiving portion 21, so that the attachment portion side wind receiving portion as shown by the arrow in FIG. The wind flowing toward the rear of the vehicle along the line 21 can be received by the fins 20, whereby the blade rubber 13 can be pressed more strongly against the window glass.

  As shown in FIGS. 1 and 3, a front wall side wind receiving portion 22 that inclines upward toward the rear wall surface 12 f of the rubber holder 12 is provided on the front wall surface 12 c of the rubber holder 12 on the vehicle front side. It is provided in the longitudinal direction, and the blade rubber 13 is pressed toward the wind glass when the front wall side wind receiving portion 22 receives wind. Thereby, since the area of a wind-receiving part increases, the blade rubber 13 can be pressed more strongly with respect to a window glass.

  As shown in FIG. 2, a groove-like recess 23 through which airflow flowing along the fin 20 can pass is formed between the fin 20 and the attachment portion 15 on the back side of the attachment portion 15. When the wiper blade 10 is swung by the wiper arm 11 when the wind glass is wiped, the wiper blade 10 is wiped when the longitudinal direction of the wiper blade 10 is tilted from the vehicle width direction toward the front-rear direction of the vehicle. In this case, the traveling wind flowing in the longitudinal direction on the top wall 12d along the fin 20 increases, and the wind force received by the fin 20, the mounting portion side wind receiving portion 21, and the front wall side wind receiving portion 22 is weakened. However, by forming the recesses 23 as described above, the airflow flowing along the fins 20 flows rearward through the recesses 23 and is less likely to be disturbed by the collision with the mounting portion 15. Can be suppressed, and the wiping property can be improved. In addition, the distance from the wind glass surface becomes long as the fin 20 goes to the rear wall surface 12f from the front wall surface 12c except for the attachment part 15.

  4 to 6 are diagrams showing a wiper blade according to another embodiment. 4 and 5, members that are the same as those shown in FIGS. 1 to 3 are assigned the same reference numerals, and duplicate descriptions are omitted. 5 is a cross-sectional view taken along the line CC shown in FIG. 4, and FIG. 6 is a perspective view of the cover shown in FIG.

  In the wiper blade 30 shown in FIG. 4, covers 31 are attached to both ends of the rubber holder 12 to improve the appearance quality of the wiper blade 30. As shown in FIGS. 5 and 6, the cover 31 is formed in a U-shaped cross section having a top wall portion 31 a and a pair of side wall portions 31 b, and a cover mounting portion that is partially opened for coupling to the blade holder 12. 33 is formed at one end. Holding claws (not shown) similar to the rubber holder 12 are formed at both ends of the cover 31 in the longitudinal direction. Then, by engaging these holding claws with the holding groove 13h, the cover 31 is mounted on the blade rubber 13 in a state in which the cover 31 can swing in a direction perpendicular to the window glass (not shown), The end of the blade rubber 13 is covered.

  As shown in FIG. 5, an engagement convex portion 12e extending toward the blade rubber 13 is integrally provided on the top wall portion 12a of the rubber holder 12, and a cover mounting portion is provided on the engagement convex portion 12e. 33 opening portions are engaged. That is, the head portion 13a of the blade rubber 13 is sandwiched between the holding claw 17, the cover mounting portion 33, the top wall portion 12a, and the both side wall portions 12b, whereby the head portion 13a is held by the holding portion 16a. Yes.

  The mounting method of the cover 31 is not limited to the structure in which the holding claw is engaged with the holding groove 13h. For example, instead of the holding claw, an engagement protrusion is provided at one end on the rubber holder 12 side of the cover 31, and the rubber holder An engagement hole that opens toward the cover 31 is provided at the end of 12, and the cover 31 is rocked to the end of the rubber holder 12 by engaging the engagement protrusion with the engagement protrusion with the rubber cover attached. You may make it mount | wear freely.

  When the blade rubber 13 is in contact with the window glass, the outer surface of the top wall portion 31a of the cover 31 is flush with the top wall portion 12a of the rubber holder 12, and the side wall portion 31b of the cover 31 is a corresponding rubber. It is flush with the side wall 12b of the holder 12. Therefore, by attaching the cover 31 to the rubber holder 12, the sense of unity of the shape from the rubber holder 12 to the cover 31 is increased, and the appearance quality of the wiper blade 30 can be improved.

  A cover-side wind receiving portion 32, also referred to as a fin, is provided on the top wall surface 31c of the cover 31 along the longitudinal direction of the cover 31, and the cover-side wind receiving portion 32 is disposed on the front side of the vehicle. It inclines upward from the front wall surface 31d toward the rear wall surface 31e disposed on the rear side of the vehicle. When the cover side wind receiving portion 32 receives wind, the blade rubber 13 is pressed toward the window glass. Thereby, since the area of a wind-receiving part increases, the blade rubber 13 can be pressed more strongly with respect to a window glass.

  That is, the wiper blade 30 shown in FIG. 4 is provided with a cover-side wind receiving portion 32 in addition to the fins 20 to 22 that press the blade rubber 13 against the wind glass when receiving wind. Improvement of wiping property is achieved. The distance from the wind glass surface of the cover-side wind receiving portion 32 increases from the front wall surface 12c toward the rear wall surface 12f. Further, the height of the fin 20 from the window glass is set to be higher than the height of the attachment portion side wind receiving portion 21, and the fin 20 receives the wind flowing rearward along the attachment portion side wind receiving portion 21. It is possible to improve the wiping property. In addition, the wiping performance is improved by providing the recess 23 that improves the escape of the airflow flowing in the longitudinal direction of the wiper blade 10 along the fin 20.

  In the above embodiment, the cover side wind receiving portion 32 provided on the cover 31 is provided with the cover side wind receiving portion 32 similar to the fin 20 on the top wall surface 31c, but is not limited thereto. A wind receiving portion similar to the front wall side wind receiving portion 22 may be provided on the front wall surface 31 d of the cover 31. Further, as the cover side wind receiving portion 32 provided in the cover 31, a wind receiving portion similar to the fin 20 may be provided on the top wall surface 31c, and the front wall side wind receiving portion 22 may be provided on the front wall surface 31d. .

  The present invention is not limited to the embodiment described above, and various modifications can be made without departing from the scope of the invention. For example, in the present embodiment, as the rubber holder 12, a two-point support type provided with a pair of holding portions 16a and 16b at both ends is used. It is also possible to use a type that holds the blade rubber 13 via the leaf spring member 14 by holding the intermediate portion 14 or a tournament type that has a plurality of levers assembled. Furthermore, the present invention can be applied to wiper blades used in various types of wiper apparatuses such as a tandem type and a counter wiping type.

It is a perspective view which shows the wiper blade which is one embodiment of this invention. It is sectional drawing which follows the AA line shown in FIG. It is sectional drawing which follows the BB line shown in FIG. It is a perspective view which shows the wiper blade which is other embodiment. It is sectional drawing which follows the CC line shown in FIG. It is a perspective view of the cover shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Wiper blade 11 Wiper arm 12 Rubber holder 12a Top wall part 12b Side wall part 12c Front wall surface 12d Top wall surface 12e Engaging convex part 12f Rear wall surface 13 Blade rubber 13a Head part 13b Lip part 13c Connection part 13d Neck part 13e Mounting groove 13f Partition Part 13g arm part 13h holding groove 14 leaf spring member 15 attachment part 15a front wall surface 15b rear wall surface 16a holding part 16b holding part 17 holding claw 19 cap 20 fin 21 attachment part side wind receiving part 22 front wall side wind receiving part 23 recessed part 30 Wiper blade 31 Cover 31a Top wall portion 31b Side wall portion 31c Top wall surface 31d Front wall surface 31e Rear wall surface 32 Cover side wind receiving portion 33 Cover attachment portion

Claims (5)

A wiper blade having a rubber holder attached to a wiper arm that is swingably mounted on a vehicle, and a blade rubber that is held by the rubber holder and wipes the wind glass of the vehicle,
The front wall surface of the rubber holder disposed on the front side of the vehicle is provided with a mounting portion attached to the wiper arm,
On the top wall surface of the rubber holder, fins that are inclined upward from the front wall surface toward the rear wall surface disposed on the rear side of the vehicle are provided over the entire length of the rubber holder ,
Wiper blade, characterized in Rukoto longitudinally extending recess of the rubber holder is formed between the fin and the mounting portion. In claim 1 Symbol placement wiper blade, the front wall of the mounting portion disposed on the front side of the vehicle is inclined upward toward the rear wall of the mounting portion disposed on the rear side of the vehicle The wiper blade according to claim 1, wherein an attachment portion side wind receiving portion is provided along a longitudinal direction of the rubber holder. 3. The wiper blade according to claim 2 , wherein the height of the fin from the surface of the window glass is made higher than the height of the mounting portion side wind receiving portion. The wiper blade according to any one of claims 1 to 3 , wherein a front wall side wind receiving portion that is inclined upward toward the rear wall surface of the rubber holder is formed on the front wall surface of the rubber holder. A wiper blade provided along the longitudinal direction of the holder. In the wiper blade according to any one of claims 1-4, together with the mounted on an end portion of the rubber holder providing a cover for covering an end portion of the blade rubber, arranged on the front side of the vehicle of the cover A wiper blade, comprising: a cover-side wind receiving portion that is inclined upward from a front wall surface to a rear wall surface disposed on the rear side of the vehicle.

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