JPH05193452A - Wiper blade for vehicle - Google Patents

Abstract

PURPOSE:To prevent moving up at the time of travel and chattering at the time of wiping action and improve the looking of a wiper blade and vision field in the case of the wiper blade for a vehicle. CONSTITUTION:This is a vehicle wiper blade made up of secondary levers 8 supported swingably against a primary lever 7, yokes 9 supported swingably against secondary levers 8 and a blade rubber 10 retained by means of yokes 9. Air holes 13 are formed at the primary lever 7, and a fin 17 that makes travel air flow at the time of vehicle travel not run to the blade rubber 10 side and at the same time guides the travel air flow to the outside through the air holes 13 of the primary lever 7, is provided at each secondary lever 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle wiper blade, and more particularly to a vehicle wiper blade having means that is not affected by running wind.

[0002]

2. Description of the Related Art Conventionally, in order to prevent the blade rubber of a wiper blade from floating due to the influence of traveling wind when a vehicle is traveling, JP-A-62-6186 is used.
The one shown in Japanese Patent Publication No. 2 has been proposed. That is, the fin is formed on the primary lever on the side where the traveling wind collides. Then, the fin receives the traveling wind, and the pressure of the traveling wind causes the wiper blade to come into pressure contact with the windshield, so that the blade rubber allows the windshield to be wiped well.

In order to prevent the blade rubber of the wiper blade from warping reversely due to the influence of traveling wind when the vehicle is traveling, the one shown in German Patent Application Publication No. 313944 A1 has been proposed. ing. In other words, fins are formed on the primary lever of the wiper blade so as to prevent running wind from flowing to the blade rubber side, and cover the side portions of the blade rubber. The traveling wind is guided to the outside along the fins. As a result, the blade rubber will not reverse warp due to the running wind,
Chatter of the wiper blade during the wiping operation is prevented.

[0004]

However, in the former case, although the wiper blade can be prevented from being lifted up due to the influence of traveling wind when the vehicle is running, the fin shape for preventing the wiper blade from being lifted up must be increased. .. Therefore, since the pressure of the traveling wind received by the wiper blade becomes large, there is a problem that the output of the motor for performing the wiping operation of the wiper blade must be increased. Further, when the shape of the fin formed on the wiper blade is increased, not only the appearance of the wiper blade is deteriorated but also the visibility during driving is adversely affected.

On the other hand, in the latter case, the fin is formed on the primary lever so that the running wind does not flow to the blade rubber side. However, when this wiper blade is used for the wind glass whose curved surface changes greatly, the curved surface of the wind glass is It must be taken into consideration that the fins do not interfere with the windshield due to changes in Therefore, it is difficult to always maintain a constant gap between the fin and the windshield, and there is a problem that it is not possible to reliably prevent reverse warpage of the blade rubber due to running wind.

The present invention has been made to solve the above problems, and its purpose is to prevent lifting during running and chatter during wiping, and
An object of the present invention is to provide a wiper blade for a vehicle that can improve the appearance and visibility of the wiper blade.

[0007]

In order to solve the above-mentioned problems, the present invention provides a secondary lever swingably supported by a primary lever, and a yoke swingably supported by the secondary lever. In a vehicle wiper blade composed of a blade rubber held by the yoke, a wind vent hole is formed in the primary lever, and the secondary lever does not allow running wind to flow toward the blade rubber when the vehicle is running. In addition, the gist of the present invention is to provide a fin for guiding the traveling wind to the outside through the air vent hole of the primary lever.

[0008]

The traveling wind of the vehicle is prevented by the fins of the secondary lever from flowing to the blade rubber side, and the traveling wind is guided to the outside through the wind vent hole formed in the primary lever by the fins. ..
Therefore, the blade rubber does not warp backwards due to the running wind, and chatter during the wiping operation of the wiper blade is prevented. Further, the fins of the secondary lever prevent the running wind from flowing to the blade rubber side and receive the pressure of the running wind, so that the wiper blade can be pressed against the windshield and the lifting of the wiper blade is prevented.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment embodying the present invention will now be described with reference to FIGS.
A description will be given based on FIG. As shown in FIGS. 1 and 2, a pivot shaft of a vehicle (not shown) has a wiper arm 4 including an arm head 1, a retainer 2 and an arm piece 3.
Is rotatably provided. A wiper blade 6 is swingably provided at the tip of the arm piece 3 of the wiper arm 4 via a clip 5.

The wiper blade 6 is a primary lever 7 provided so as to be swingable with respect to the wiper arm 4.
A pair of secondary levers 8 swingably provided with respect to the primary levers 7, and a yoke 9 swingably provided with respect to the pair of secondary levers 8.
And a blade rubber 10 held by the yoke 9.
It is composed of and.

The secondary levers 8 are swingably provided at both ends of the primary lever 7 via connection pins 11. Further, the yoke 9 is swingably provided at both ends of the pair of secondary levers 8 via connection pins 12. Therefore, the wiper blade 6 of the present embodiment is formed in a tournament type structure. Holding pieces 9a are formed at both ends of the four yokes 9 and are bent inward, and the holding pieces 9a are formed in the holding groove 10 formed in the blade rubber 10.
It is fitted in a. Therefore, the blade rubber 1
0 has a structure in which the holding piece 9a of the yoke 9 supports eight points.

A plurality of air vent holes 13 are formed on the upper surface of the primary lever 7, and a guide portion 14 is bent obliquely downward on the side surface (the side on which the traveling wind collides when the vehicle travels). There is. Therefore, the guide portion 14
Thus, the running wind when the vehicle is running is prevented from entering the inside of the wiper blade 6, and the running wind is directed upward along the guide portion 14 as shown in FIG.

The side wall 18 of the primary lever 7 facing the guide portion 14 has a height in the direction of the windshield smaller than that of the guide portion 14 so that the traveling wind that has entered the primary lever 7 can flow backward. To improve the overall running wind escape.

On the side surface of the secondary lever 8 (the side on which the traveling wind collides with the traveling of the vehicle), there is an extending portion 15 extending obliquely downward and a downward extension from the tip of the extending portion 15. A fin 17 composed of the guide piece 16 is integrally formed. The guide pieces 16 of the fins 17 are designed to prevent running wind from running the vehicle from flowing toward the blade rubber 10. In addition, the extending portion 15 of the fin 17 guides the traveling wind that has invaded upwards while avoiding the guide portion 14, and the traveling wind is guided through the wind vent hole 13 formed on the upper surface of the primary lever 7 to the wiper blade 6 It is designed to guide you outside.

Next, the operation of the vehicle wiper blade configured as described above will be described. As shown in FIG. 4, part of the traveling wind when the vehicle travels is prevented from entering the wiper blade 6 by the guide portion 14 of the primary lever 7, and the traveling wind that collides with the guide portion 14 is prevented. It flows upward along the guide portion 14. At this time, the upper surface of the primary lever 7 (near the arrow A in FIG. 4) is in a negative pressure state due to the traveling wind that flows upward by the guide portion 14.

Further, a part of the running wind that avoids the guide portion 14 of the primary lever 7 tries to flow to the blade rubber 10 side, but the flow is blocked by the guide piece 16 of the fin 17 and the fin 17 extends. It is guided so as to flow to the upper surface side of the projecting portion 15. Then, the traveling wind flowing between the guide portion 14 and the fins 17 flows upward along the fins 17, and the traveling wind is guided to the outside through the air vent holes 13 of the primary lever 7. At this time, since the upper part of the primary lever 7 is in a negative pressure state, the traveling wind flowing upward along the fins 17 is smoothly guided to the outside.

Also, a very small part of the running wind is the blade rubber 10.
Although it flows to the side, there is no cause of reverse warp in which the blade rubber 10 falls down in the direction opposite to the wiping operation direction due to this running wind. As a result, it is possible to prevent chattering of the blade rubber 10 during the wiping operation of the wiper blade 6.

Furthermore, since the guide portion 14 and the extending portion 15 of the fin 17 receive a part of the pressure of the traveling wind, the wiper blade 6 is pressed against the windshield by this pressure. As a result, lifting of the wiper blade 6 can be prevented.

Further, since the guide piece 16 of the fin 17 is formed on the secondary lever 8 which follows the curved surface of the window glass at a position close to the window glass, the guide piece 16 is formed.
Can be prevented from interfering with the windshield glass, and the distance between the guide piece 16 and the windshield can be always kept constant.

Further, since the extending portion 15 of the fin 17 for preventing the wiper blade 6 from rising is provided on the secondary lever 8 close to the blade rubber 10, the efficiency of the pressure contact force transmitted to the blade rubber 10 is increased.
Therefore, the overall shape of the fins 17 can be reduced, so that the appearance of the wiper blade 6 can be improved and at the same time, it is possible to prevent the visual field during driving from being adversely affected.

In this embodiment, the fin 17 is formed integrally with the secondary lever 8, but as shown in FIG. 5, the fin 17 which is a separate member made of resin or metal is projected to the side surface of the secondary lever 8. It is also possible to attach.

Although it may be considered to provide it on the side surface of the yoke 9, the fin 17 is provided on the yoke 9 which is a relatively small component.
Is difficult to form, and the assembly work of mounting the yoke 9 having the fins 17 formed thereon to the secondary lever 8 is troublesome. However, in the present invention, by providing the fin 17 as a rough component and providing the secondary lever 8 that follows the change of the curved surface of the wind glass,
The wiper blade 6 can be easily assembled.

Further, when the fin 17 is a separate member, the assembling work for attaching the fin 17 to the secondary lever 8 can be performed in half of the assembling work for attaching the fin 17 to the yoke 9.

Although the guide portion 14 is formed on the primary lever 7 in this embodiment, it is not always necessary to provide the guide portion 14, and it may be formed if necessary. Further, although the fin 17 of this embodiment is composed of the extending portion 15 and the guide piece 16, the fin 17 may be composed of only the extending portion 15. In short, the fins 17 may have any shape as long as the running air does not flow to the blade rubber 10 side.

[0025]

As described above in detail, according to the present invention, it is possible to prevent the floating during running and the chatter during the wiping operation, and to improve the appearance and visibility of the wiper blade. ..

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a vehicle wiper blade according to the present invention.

FIG. 2 is a front view of a vehicle wiper blade.

FIG. 3 is a sectional view taken along line XX in FIG.

4 is a cross-sectional view taken along the line YY in FIG.

FIG. 5 is an exploded perspective view showing another example in which the fin is formed as a separate member with respect to the secondary lever.

[Explanation of symbols]

7 ... Primary lever, 8 ... Secondary lever, 9
… Yoke, 10… Blade rubber, 13… Wind vent, 1
7 ... Fins

Claims (1)

[Claims] 1. A vehicle comprising a secondary lever swingably supported by a primary lever, a yoke swingably supported by the secondary lever, and a blade rubber held by the yoke. In the wiper blade, an air vent hole is formed in the primary lever, the running air when the vehicle is running is prevented from flowing to the blade rubber side in the secondary lever, and the running air is taken in by the air vent hole of the primary lever. A wiper blade for a vehicle, characterized in that it is provided with a fin that guides it to the outside through the wiper blade.