JP2524084Y2 - Winter blades for vehicle wipers - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winter blade having a yoke for supporting a blade rubber and a rubber cover for covering a lever mechanism, and more particularly to a rubber when the blade rubber follows a curved surface of a window glass. The present invention relates to a winter blade improved so as not to loosen a cover.

[0002]

2. Description of the Related Art FIG. 3 shows a conventional example of a winter blade, and is a side view in which a part of a rubber cover 1 is cut away. The left half of the primary lever 2 is illustrated in FIG. 3, and both ends pivotally support the center of the secondary lever 3 so as to be tiltable. The secondary lever 3 further supports, at both ends thereof, yokes 4 so as to be tiltable. The yokes 4 support the blade rubber 5 to press the blade rubber 5 against a window glass (not shown in this drawing) to perform a wiping operation. Let it do.

In FIG. 3, reference numeral 9 denotes a wiper blade.
Clip base for detachably connecting to the wiper arm
It is. This clip base 9 is interposed through the rubber cover 1.
And is fixed to the primary lever 2. this
As a result, a part of the rubber cover 1 has a clip base 9 and a lever.
Between the primary lever 2 of the mechanism
I have.

FIG. 4A shows an AA cross section of the primary lever 2, yoke 4, blade rubber 5, and rubber cover 1. This drawing illustrates a state in which the blade rubber 5 is in contact with the flat portion of the window glass 6.
In this state, the side surface of the rubber cover 1 is stretched between the primary lever 2 and the yoke 4, and receives light tension by the elasticity of the rubber cover 1 itself. In this specification, the side surface of the rubber cover 1 refers to a portion where the rubber cover is stretched between the primary lever 2 and the yoke 4, and a space outside the rubber cover is referred to as a side. . Further, in the rubber cover 1 , a portion located on the opposite side to the window glass 6 is referred to as a top surface. The names of these side surfaces and top surfaces are defined for convenience of explanation, and have no relation to the earth and the lower and upper and lower directions. Further, portions at both ends of the top surface in the sectional view will be referred to as shoulder portions.

In addition, the above-mentioned conventional winter blade and
For example, Japanese Utility Model Application No. 61-98413 (Japanese Utility Model Application
No. 63-4768).
There is

[0006]

FIG. 5 is a schematic diagram showing an operating range of a window wiper 7 provided in front of a window glass 6 of an automobile (in the drawing, on the near side of the drawing). In this figure, the left side of the figure is the driver's seat side, and the right side is the passenger's seat side. In this drawing, the window wiper on the passenger seat side is shown, and the window wiper on the driver seat side is omitted. A substantially fan-shaped area 6a surrounded by an imaginary line is an operating area of the wiper, and a portion 6b along one radial side on one side thereof is a resting part of the wiper blade.
A portion 6c along the other side is a reversing portion in the reciprocating operation of the wiper blade. Since the window glass 6 has a curved surface, the blade rubber 5 of the wiper blade (see FIG. 3) must perform the wiping operation following this curved surface. In order to follow this, the blade rubber 5 is provided with a lever mechanism including a secondary lever 3 and a primary lever 2 that support the yoke 4.

When the wiper blade is in the rest position 6 on the passenger seat side,
When wiping the vicinity of b, it is necessary to follow a portion having a small curvature. FIG. 5B shows the wiper blade at this position when viewed in the direction of arrow B shown in FIG. 5A. Since the radius of curvature in the vicinity of the illustrated arrow R is small, to follow this, (B) the sliding contact pressure on the glass surface of the blade rubber 5 tends to be insufficient at the left end of the drawing, and the sliding contact pressure at the right end of the drawing. However, it tends to be over-atmosphere.
FIG. 4B shows a cross section A′-A ′ of FIG.

In FIG. 4, the distance between the primary lever 2 and the blade rubber 5 is reduced in FIG. 4B, which is a follow-up state, as compared with FIG. ing. For this reason, the side surface of the rubber cover 1 is loosened. When the rubber cover 1 for this slack is Surisawa the window glass 6, possibility is there lead to payment wipe failure.

The present invention has been made in view of the above circumstances, and when the wiper blade operates to follow the curved surface of the window glass, there is no possibility that the rubber cover 1 will loosen and come into contact with the window glass. And a winter blade.

[0010]

In order to achieve the above object (prevention of loosening of the rubber cover), the winter blade according to the present invention is configured such that a part of the rubber cover is pressed between the lever mechanism and the clip base. In the winter blade, a pressing portion is provided on the part of the rubber cover.
This pressing portion is formed by the clip base during molding.
It is molded in a shape that is convex toward the base, and during assembly
It is elastically deformed into a substantially flat surface, and the shoulders on the left and right sides of this substantially flat surface
Then, loosen the rubber cover on the side opposite to the window glass.
Is characterized in that a stress to be absorbed is generated .

[0011]

When the above-mentioned means is applied, when the wiper blade is in the following state and the blade rubber approaches the primary lever, when the tension on the side surface of the rubber cover is lost, the top surface portion is elastically deformed and pressed. The shoulder portion is lifted up by the influence of the stress of the pinching portion, absorbing the slack on the side surface and preventing the rubber cover from contacting the window glass.

[0012]

FIG. 2 shows an embodiment of the present invention, and FIG. 2 (A) is a single perspective view of the rubber cover 11 according to the present invention. That,
FIG. 2B is a cross-sectional view taken along the plane S. The rubber cover 11 is formed so that the top surface (pressing portion) protrudes outward from the cover as shown in FIG. More specifically, as shown in FIG. 3A, only the central portion is formed in a convex shape in the longitudinal direction. 1a drawn with virtual lines is
FIG. 7 shows the shape of the top surface of a rubber cover of a conventional example for reference. When such a rubber cover 1 is attached to the winter blade assembly as in FIG. 2 (C), the said clamping
The convex part of the pressure part 11 a is sandwiched between the primary lever 2 and the clip base 9. FIG. 2D schematically shows a state in which the pressing portion 11a on the top surface is pressed to be substantially flat. Thus, the clamping portion 11 on the top surface
When a is bent such that the plane is clamping, it
The shoulder portion K is lifted by the influence of the generated stress. FIG. 1A is a sectional view of the embodiment shown in FIG. 2 taken along a plane S ′ in an assembled state. FIG. 1A is a cross-sectional view corresponding to FIG. 4A in the conventional example, and illustrates a state where a flat portion of the window glass 6 is wiped.

FIG. 1B shows a state in which the winter blade of the above embodiment follows the curved surface of the window glass 6, and corresponds to FIG. 4B in the conventional example.

When the tension of the rubber cover 1 is reduced and the rubber cover 1 is to be loosened, the shoulder portion K of the rubber cover 1 is moved to the position shown in FIG.
Rises as described above to absorb the slack. For this reason, the rubber rubber slides on the window glass 6 to wipe it off.
There is no possibility of causing a defect .

[0015]

As described above, when the present invention is applied as described in the embodiment, when the wiper blade operates to follow the curved surface of the window glass, there is no possibility that the rubber cover is loosened. Therefore, there is no danger that the rubber cover and the window glass may come into contact with each other to cause poor wiping due to frictional resistance.
No.

[Brief description of the drawings]

FIG. 1 is a view illustrating an embodiment of a winter blade according to the present invention, and is an explanatory view of an operation and an effect.

FIG. 2 is an explanatory view of a rubber cover in the embodiment of the winter blade according to the present invention.

FIG. 3 is a side view, partially broken away, showing a conventional example of a winter blade of a vehicle wiper.

FIG. 4 is a cross-sectional view for explaining a problem relating to a winter blade of the conventional vehicle wiper.

FIG. 5A is a front view of a window glass provided with a wiper, and FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Rubber cover, 2 ... Primary lever, 3 ... Secondary lever, 4 ... Yoke, 5 ... Blade rubber, 6 ...
Window glass, 6a: Wiper operating area, 6b: Wiper blade stop, 6c: Wiper blade reversal, 7: Window wiper, 9: Clip base, 10
... Rivets, 11 ... Example rubber cover, 11a ... Squeezing pressure
Part ( top surface formed into a convex shape ) .

Claims (1)

(57) [Scope of request for utility model registration] 1. A blade rubber for wiping a window glass, a yoke and a lever mechanism supporting the blade rubber, a rubber cover covering the yoke and the lever mechanism, and the lever mechanism via the rubber cover. includes a fixed clip base, the said at winter blade portion of the rubber cover is clamped between the clip base and the lever mechanism, the portion of the rubber cover, said during molding Formed with a convex shape toward the clip base
It is shaped and elastically deformed to a substantially flat surface during assembly.
At the left and right shoulders of the substantially flat surface,
Absorbing stress is generated on the opposite side of the window glass.
Pressing portions, characterized in that provided, wiper winter blade for vehicles that.