JP2000190818A - Vehicular wiper blade - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular wiper blade provided with a spoiler having no fear of the narrowing of a visual field. SOLUTION: This wiper blade is provided with a blade rubber 35 for wiping a window glass and a spoiler 40, 41 with nearly same width as a blade lever for generating the force pressing the blade rubber 35 to the window glass by receiving a running wind pressure in the space toward the blade lever for holding the blade rubber 35. In the spoiler 40, 41, a through hole 40a in which a running wind is passed through is formed and a wind receive wall 40d, 41d for generating a press force by receiving the running wind pressure to the inner surface of the through hole 40a is provided. In the through hole 40a, its outlet 40c, 41c side is formed narrower than the inlet 40b side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiper blade used for a vehicle, and more particularly to a wiper blade provided with a spoiler that presses a blade rubber against a window glass of a vehicle under wind pressure during high-speed running of the vehicle.

[0002]

2. Description of the Related Art Examples of this type of wiper blade are disclosed in Japanese Utility Model Laid-Open No. 1-174271 and Japanese Utility Model Laid-open No. 1-108865.

FIG. 4 shows an example of such a conventional wiper blade. In the figure, a wiper blade 1 includes a primary lever 2, a secondary lever 3 pivotally supported at both ends of the primary lever 2, a tertiary lever 4 pivotally supported at both ends of the secondary lever 3, and each tertiary lever. 4 includes a blade rubber 5 gripped by 4 and a holding blade (corresponding to a spoiler) 6 attached to a front portion of the primary lever 2.

[0004] The primary lever 2 has a substantially inverted U-shaped cross section, and is entirely formed in an arc shape. Similarly, each of the secondary levers 3 has a substantially inverted U-shaped cross section, and is formed in an arc shape smaller than the primary lever 2 as a whole. The respective intermediate portions are rotatably attached to both ends of the primary lever 2 via rivets 7.

Similarly, each tertiary lever 4 has a substantially inverted U-shaped cross section, and is formed in an arc shape smaller than the secondary lever 3 as a whole. Further, claw portions 8 each having a square C-shaped cross section are provided at both ends of each tertiary lever 4. Each of the intermediate portions is rotatably attached to both ends of each of the secondary levers 3 via rivets 9.

In FIG. 1, reference numeral 10 denotes a clip for attaching the wiper blade 1 to a wiper arm (not shown). The clip 10 rotates through a rivet 12 into an opening 11 formed in the upper central portion of the primary lever 2. Mounted as possible.

[0007] The blade rubber 5 is a rubber body which is formed in a ribbon shape by setting a dimension slightly larger than a dimension between the tertiary levers 4 at both ends in the longitudinal direction, and is formed in a T-shape at an upper portion. A mounting portion 13, a lip portion 15 bulging continuously from the mounting portion 13 via a neck portion 14 in both sides, and a wiping edge portion 16 sandwiched at an acute angle downward from the lip portion 15. I have.

The upper mounting portion 13 is gripped and mounted on the claw portion 8 of each tertiary lever 4.
The presser blade 6 is a plate having a length substantially the same as that of the primary lever 2 and curved in the vertical direction. The front portion of the primary lever 2 has an angle for efficiently receiving the traveling wind of the vehicle. A set rivet 7 for pivotally supporting the secondary lever 3 to the primary lever 2 and a rivet 12 for pivotally supporting the clip 10 to the primary lever 2 are attached.

The wiper blade 1 has such a structure. As shown in FIG. 5, a presser blade 6 attached to a front portion of a primary lever 2 receives a wind pressure during traveling of a vehicle and reverses the pressure. A lift is generated and each lever 2,
3 and 4 are pressed against the window glass, and the blade rubber 5 is pressed against the window glass. That is, the floating of the wiper blade 1 is prevented, and the wiping performance is ensured.

FIG. 6 shows that the wiper blade 1B provided with the front and rear two-stage pressing blades 6A and 6B may not be able to receive the wind from the front when the vehicle is traveling with one pressing blade 6. Is shown. FIG. 7 shows the flow of the wind at that time.

[0011]

By the way, in the conventional wiper blades 1 and 1B, the pressing blades 6, 6A and 6B are attached to the front side of the primary lever 2 so as to generate the pressing force by the traveling wind pressure. Since the holding blades 6, 6A, 6B having appropriate widths are formed so as to protrude from the front side of the primary lever 2, the driver's field of view may be narrowed by the width of the holding blades 6, 6A, 6B. was there.

The present invention has been made in view of the above circumstances, and has as its object to provide a vehicle wiper blade provided with a spoiler which does not have a possibility of narrowing the field of view.

[0013]

According to a first aspect of the present invention, there is provided a wiper blade for a vehicle, wherein a space between a blade rubber for wiping a window glass and a blade lever for holding the blade rubber is substantially equal to the blade lever. A spoiler having the same width and generating a force for pressing the blade rubber against the window glass by receiving a traveling wind pressure is provided.

In the wiper blade according to the present invention, the spoiler which generates a force for pressing the blade rubber against the window glass by receiving the traveling wind pressure is set to have substantially the same width as the blade lever, and the space between the blade rubber and the blade lever is set. , It is possible to prevent the driver's view from being narrowed by the spoiler.

Further, since the spoiler is arranged so as to be hidden in the space between the blade lever and the blade rubber, the spoiler is unlikely to be deformed by hitting something, and the performance of the spoiler is maintained for a long time. Can be.

According to a second aspect of the present invention, there is provided the wiper blade for a vehicle according to the first aspect, wherein the spoiler is provided with a through-hole through which the traveling wind passes, and the inner surface of the through-hole receives the traveling wind pressure so as to be pressed. It is characterized by having a wind receiving wall for generating a force.

In the wiper blade according to the present invention, when the traveling wind passes through the through-hole of the spoiler, the wind hits the wind receiving wall on the inner surface of the through-hole, thereby generating a pressing force (reverse lift) by the wind pressure.

In this case, since a passage through which the traveling wind passes is secured inside the spoiler, unlike a case where one or a plurality of blade-shaped spoilers (= holding blades) are attached to the blade lever, the spoiler is not used. The blade lever can be firmly fixed in a proper posture. Therefore, the wind receiving wall can be reliably set in a direction to efficiently receive the traveling wind, and does not move even when an external force is applied.

Further, since the wind receiving wall is formed on the inner surface of the through hole, the portion is less likely to be damaged or deformed, and a smooth flow of the traveling wind can be maintained for a long period of time.

According to a third aspect of the present invention, there is provided the wiper blade for a vehicle according to the second aspect, wherein an outlet of the through hole is narrower than an inlet of the through hole.

In the wiper blade of the present invention, the entrance of the through hole of the spoiler is made narrower than the exit, so that a dynamic pressure is generated when the traveling wind passes through the through hole, thereby increasing the force acting on the wind receiving wall. Then, a large pressing force (reverse lift) is generated.

Therefore, the traveling wind can be efficiently converted to the blade rubber pressing force, and a strong pressing force can be generated even with a small spoiler width.

According to a fourth aspect of the present invention, there is provided the wiper blade for a vehicle according to any one of the first to third aspects, wherein the spoiler is arranged in a space between a primary lever of the blade levers and the blade rubber. And it is characterized by being supported by engaging with the primary lever.

In the wiper blade according to the present invention, since the spoiler is fixed to the primary lever directly attached to the wiper arm, even a relatively large spoiler can be firmly supported.

Further, since a large spoiler can be stably supported, a large portion can be provided for receiving the traveling wind, and a pressing force as large as possible can be generated.

According to a fifth aspect of the present invention, there is provided the wiper blade for a vehicle according to any one of the first to fourth aspects, wherein the spoiler includes a secondary lever connected to both longitudinal ends of a primary lever among the blade levers. It is arranged in a space between the blade rubbers and is supported by engaging with the secondary lever.

In the wiper blade according to the present invention, the spoiler is attached to the secondary lever connected to both ends of the primary lever in the longitudinal direction. It can be effectively prevented.

Therefore, in addition to disposing the spoiler between the primary lever and the blade rubber, and disposing the spoiler between the secondary lever and the blade rubber, the entire surface of the blade rubber is reliably pressed against the window glass. be able to.

[0029]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a wiper blade 30 according to the embodiment.
FIG. 2A is an overall perspective view of the same wiper blade 30.
2 (b) is a side view, and FIG. 3 is a cross-sectional view of each part of FIG. 2 (b).

As shown in FIG. 1 and FIG. 2, the wiper blade 30 has a blade rubber 35 for wiping a window glass, a metal blade lever 33 for holding the blade rubber 35, and a blade which receives running wind pressure. It is composed of hard resin spoilers 40 and 41 that generate a force for pressing the rubber 35 against the window glass.

The blade lever 33 includes a primary lever 33A, a secondary lever 33B having a central portion pivotally supported at both ends of the primary lever 33A, and a tertiary lever 33C having a central portion pivotally supported at the inner end of the secondary lever 33B. Consists of The blade rubber 35 is shown in FIG.
As shown in (2), it is gripped at a total of six points (P1 to P6) at the outer ends of the two secondary levers 33B and both ends of the two tertiary levers 33C. The points P1 to P6 are arranged at substantially equal intervals.

The center spoiler 40 is disposed in a space between the primary lever 33A and the blade rubber 35. Further, the spoilers 41 at both ends are arranged in a space between the secondary lever 33B and the blade rubber 35 within a range that does not interfere with the central spoiler 40.

As shown in FIGS. 2A, 3B and 3C, the center spoiler 40 is
A is set to be substantially the same as the maximum width of A, and spoilers 4 at both ends are set.
1 is set to be smaller than the maximum width of the primary lever 33A, as shown in FIGS. 2 (a) and 3 (d).

The center spoiler 40 is formed in a sectional shape so as not to interfere with the secondary lever 33B and the tertiary lever 33C. Since the spoilers 41 at both ends are formed smaller than the spoiler 40 at the center, the spoilers 41 slightly protrude from the secondary lever 33B so as to receive the wind well.

The primary lever 33A, the secondary lever 33B, and the tertiary lever 33C are all substantially U-shaped in cross section, and are entirely formed in an arc shape. As shown in FIGS. 3B and 3D, the spoilers 40 and 41 are provided with a reverse U of the primary lever 33A and the secondary lever 33B.
The upper end portion is fitted in the letter-shaped portion, and the engaging projection 40p provided at an appropriate location is engaged with a hole on the lever side or is caulked at an appropriate location, so that it does not move or come off. Is fixed to the blade lever 33.

As shown in FIGS. 3B, 3C and 3D, the spoilers 40 and 41 are formed with through holes 40a and 41a through which the traveling wind passes. Through holes 40a, 4
The inner wall of 1a is constituted by a continuous smooth curved surface, and the inner wall on the blade rubber 35 side receives the wind force of the wind, and serves as wind receiving walls 40d and 41d for applying a pressing force to the blade rubber 35 toward the window glass. It is configured.

In this case, the wind receiving walls 40d and 41d are formed by slopes which are inclined forward (toward the direction of the traveling wind) with respect to the center line L of the blade rubber 35 (a line substantially perpendicular to the window glass). Have been.

The through holes 40a and 40b are
Outlet 40c, 40d than running wind inlet 40b, 41b
Is configured as a smaller (narrower) passage.

Next, the operation will be described.

In the wiper blade 30, the wind passes through the through holes 40a and 41a of the spoilers 40 and 41 as indicated by the white arrows during traveling. At that time, the through hole 40a,
When the wind hits the wind receiving walls 40d and 41d on the inner surface of 41a, the wind pressure generates a pressing force (reverse lift) for pressing the blade rubber 35 toward the window glass.

In this case, the through holes 4 of the spoilers 40 and 41
0a, 41a is the outlet 40 from the inlet 40b, 41b side.
Since the c and 41c sides are narrower, a dynamic pressure is generated when the traveling wind passes through the through holes 40a and 41a, thereby increasing the force acting on the wind receiving walls 40d and 41d,
A large pressing force (reverse lift) is generated. Therefore, the traveling wind can be efficiently converted into the blade rubber pressing force, and a strong pressing force can be generated even with a small spoiler width.

In the case of the wiper blade 30,
Since the spoilers 40 and 41 are set to have substantially the same width as the blade lever 33 and are disposed in the space between the blade rubber 35 and the blade lever 33, the spoilers 40 and 41
Does not hinder the driver's view, and a wide view can be secured.

Further, since the spoilers 40 and 41 are almost hidden behind the blade lever 33, the appearance design is not impaired, the spoilers are less likely to be deformed by hitting something, and the performance of the spoilers 40 and 41 is extended over a long period of time. Can be maintained over time.

In the case of the wiper blade 30, the passage (through holes 40a, 41a) through which the traveling wind passes.
Are secured inside the spoilers 40 and 41, so that the spoilers 40 and 41 are attached to the blade lever unlike the conventional example in which one or a plurality of blade-shaped spoilers (= holding blades) are attached to the blade lever. Can be fixed firmly in a proper posture. Therefore, the wind receiving walls 40d and 41d can be reliably set in a direction to efficiently receive the traveling wind, and do not move even when an external force is applied.

Further, since the wind receiving walls 40d, 41d are formed on the inner surfaces of the through holes 40a, 41a, the portions are not easily damaged or deformed due to the resin, and the running wind is smooth. Flow can be maintained for a long time, and the performance can be improved.

Further, since the center spoiler 40 is fixed to the primary lever 33A directly attached to the wiper arm, it can be firmly supported even if it is formed relatively large. Therefore, the portion receiving the traveling wind can be made large, and a pressing force as large as possible can be generated.

Further, since the center spoiler 40 alone can exert a certain pressing force and the spoilers 41 are arranged at both ends, a larger pressing force can be generated. In particular, spoilers 4 at both ends
1 can effectively prevent the lifting of the secondary lever 33B, which is not very rigid and is easily lifted partially by the traveling wind.
Can be reliably pressed against the window glass.

In the above embodiment, the spoilers 40 and 41 are arranged at the center and both ends, respectively, but they may be arranged at only one of them. For example, only the center spoiler 40 may be arranged.

[0050]

As described above, according to the first aspect of the present invention, the spoiler is set to have substantially the same width as the blade lever and is disposed in the space between the blade rubber and the blade lever. The driver's view can be prevented from becoming narrow.

Further, since the spoiler is hidden behind the blade lever, the appearance design is not impaired, the spoiler can be prevented from being deformed, and the performance of the spoiler can be maintained for a long time.

According to the second aspect of the present invention, since the passage through which the traveling wind passes is secured inside the spoiler, the spoiler can be firmly fixed to the blade lever in an appropriate posture. Thus, the wind receiving wall can be reliably set in a direction to efficiently receive the traveling wind, and does not move even when an external force is applied.

Further, since the wind receiving wall is formed on the inner surface of the through hole, a smooth flow of the traveling wind can be maintained for a long period of time.

According to the third aspect of the present invention, the entrance of the through hole of the spoiler is made narrower than the exit, so that a large pressing force can be exerted by a dynamic pressure when the traveling wind passes through the through hole even if the spoiler has a small width. Can be generated.

According to the fourth aspect of the present invention, since the spoiler is fixed to the primary lever, the spoiler can be firmly supported.

According to the fifth aspect of the present invention, since the spoiler is attached to the secondary lever, it is possible to effectively prevent the wiper blade from being lifted at both ends in the longitudinal direction of the wiper blade, which is not so rigid and is easily lifted partially by running wind. . Therefore, by disposing the spoiler on the secondary lever in addition to disposing the spoiler on the primary lever, the entire surface of the blade rubber can be reliably pressed against the window glass.

[Brief description of the drawings]

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

FIG. 2A is a plan view of the wiper blade, and FIG.
Is a side view.

FIG. 3 is a sectional view of each part of the wiper blade, and FIG.
FIG. 2B is a cross-sectional view taken along the line IIIa-IIIa in FIG.
FIG. 2C is a cross-sectional view taken along the line IIIb-IIIb in FIG.
FIG. 2D is a cross-sectional view taken along the line IIIc-IIIc in FIG.
FIG. 3 is a sectional view taken along the line IIId-IIId in FIG.

FIG. 4 is a perspective view showing an example of a conventional wiper blade.

FIG. 5 is a sectional view taken along the line VV of FIG. 4;

FIG. 6 is a perspective view showing another example of a conventional wiper blade.

7 is a sectional view taken along the line VII-VII in FIG.

[Explanation of symbols]

 Reference Signs List 30 wiper blade 33 blade lever 33A primary lever 33B secondary lever 35 blade rubber 40, 41 spoiler 40a, 41a through hole 40b, 41b entrance 40c, 41c exit 40d, 41d

Claims (5)

[Claims] 1. A blade rubber having a width substantially the same as that of the blade lever and being subjected to a running wind pressure in a space between a blade rubber for wiping window glass and a blade lever for holding the blade rubber. A wiper blade for a vehicle, comprising a spoiler that generates a force for pressing the wiper against a window glass. 2. The vehicle wiper blade according to claim 1, wherein the spoiler has a through hole through which the traveling wind passes, and a receiving force that generates the pressing force by receiving a traveling wind pressure on an inner surface of the through hole. A wiper blade for a vehicle, comprising a wind wall. 3. The wiper blade for a vehicle according to claim 2, wherein an exit is narrower than an entrance of the through hole. 4. The wiper blade for a vehicle according to claim 1, wherein the spoiler is disposed in a space between a primary lever of the blade lever and a blade rubber, and
A vehicle wiper blade supported by engaging with the primary lever. 5. The wiper blade for a vehicle according to claim 1, wherein the spoiler is connected between a secondary lever connected to both ends of a primary lever of the blade lever in a longitudinal direction and a blade rubber. A wiper blade for a vehicle, wherein the wiper blade is arranged in a space and supported by engaging with the secondary lever.