JP3179233B2 - Wiper arm blade for vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiper arm blade for a vehicle used for wiping a wiping surface such as a windshield glass.

[0002]

2. Description of the Related Art Conventionally, as a wiper blade for wiping a wiping surface such as a windshield glass, a Japanese Standards Association has issued.
JIS Handbook Automobile JIS D5710 An automobile wiper blade and a wiper arm are known.

[0003] The wiper arm blade for a vehicle described above is provided with a wiper blade having a blade rubber and a metal blade lever rotatably connecting a metal lever yoke to which the blade rubber is attached. A wiper arm mounting portion is provided on a blade lever located at the center of the wiper blade. A wiper blade mounting portion of an arm piece provided on a metal wiper arm is rotatably mounted on the wiper arm mounting portion of the blade lever, and the wiper blade rotates with respect to the wiper arm around the wiper arm mounting portion. . The arm piece is provided at one end of the retainer, and the other end of the arm head having a pivot shaft mounting portion at one end and the other end of the retainer are pivotally connected to each other. An arm spring is locked between the arm head side and the retainer side. When the pivot shaft mounting part of the arm head is fixed to the pivot shaft on the vehicle body side, and this pivot shaft is reciprocated by the power from the wiper motor, the wiper arm is rotated by the arm pressure set by the arm spring. In order to swing back and forth on the wiping surface while pressing against the wiping surface, the wiping surface is wiped with a wiper blade.

When the wiping surface is curved, the wiper arm mounting portion of the blade lever rotatably mounted on the wiper blade mounting portion of the arm piece with the reciprocating rotation of the wiper arm is attached to the wiper arm. The blade rubber curves according to the wiping surface while rotating, so that the wiping surface is wiped without being wiped.

[0005]

In the above-mentioned conventional wiper arm blade for a vehicle, when it is attached to a vehicle body,
Since the wiper blade and wiper arm are exposed to the outside of the vehicle, it is easy for rain and water to splash directly on it, which tends to cause rust on the metal lever yoke, blade lever, and wiper arm.
It is necessary to perform rust prevention treatment on the surface, and if the rust prevention treatment is applied, there is a problem that the painting process becomes complicated and workability deteriorates, and since mud and dust are easily applied directly, the wiper arm of the arm piece is attached If dirt or dust is caught between the rotating part of the blade lever and the wiper arm mounting part and wear occurs, rattling occurs between the wiper blade and the wiper arm, which causes the wiper blade to reciprocate. There is a problem that it may cause a chattering phenomenon which is repeated on the wiping surface around the wiper arm mounting portion along the moving direction, and it has been a problem to solve these problems.

[0006]

SUMMARY OF THE INVENTION A wiper arm for a vehicle according to the present invention is provided.
The blades are resistant to rust on metal parts, prevent dirt and dust from entering the rotating parts, and can withstand long-term use. An object of the present invention is to provide a wiper arm blade for a vehicle that can achieve high quality by preventing the occurrence of chattering of the blade.

[0007]

Configuration of the Invention

[0008]

According to a first aspect of the present invention, there is provided a wiper arm blade for a vehicle, the wiper blade holding a blade rubber for wiping a wiping surface, and an arm to which the wiper blade is rotatably mounted. A piece integrally formed at one end of the arm, an arm head rotatably pivotally attached to the other end of the retainer, and the arm head and the retainer being engaged with the arm head and the wiper blade for wiping the wiper blade; A wiper arm having an arm spring that can be pressed into the wiper arm, a blade cover that covers the outside of the wiper blade and is integrally attached to the wiper blade, and covers the outside of the wiper arm, and is disposed in parallel with the blade cover, and And an arm cover that is integrally mounted. Pressed against the compartment cover, it is characterized in that it has a configuration in which the friction portions made of sliding protrusions cause friction force between the blade cover and the arm cover are provided.

According to a second aspect of the present invention, there is provided a wiper arm blade for a vehicle, wherein a wiper blade holding a blade rubber for wiping a wiping surface and an arm piece to which the wiper blade is rotatably mounted are provided at one end. , An arm head rotatably pivotally attached to the other end of the retainer, and an arm spring locked to the arm head and the retainer and capable of pressing the wiper blade against the wiping surface. And a blade cover that covers the outside of the wiper blade and is integrally attached to the wiper blade, and an arm that covers the outside of the wiper arm and is arranged in parallel with the blade cover and is integrally attached to the wiper arm And the blade cover is protruded toward the arm cover and pressed against the arm cover. Friction unit consisting of sliding protrusions causing frictional force is characterized in that a configuration is provided between the arm cover and the blade cover.

[0010]

The wiper arm for a vehicle according to the present invention.
In the blade, the outside of the wiper blade is covered by a blade cover, and the outside of the wiper arm is covered by an arm cover arranged in parallel with the blade cover and integrally attached to the wiper arm. A friction portion is provided, which comprises a sliding contact protrusion that protrudes and presses against the arm cover to generate a frictional force between the arm cover and the blade cover. Therefore, when the wiper arm reciprocates on the wiping surface, the wiper blade slides on the wiping surface while sliding on the arm cover along the direction of rotation of the wiper arm due to the frictional force of the sliding contact projection of the friction portion. On the other hand, wiping is performed.

[0011]

1 to 6 show one embodiment of a wiper arm blade for a vehicle according to the present invention. FIG. 1 is a front view, FIG. 2 is a vertical right side view of FIG. 1, and FIG. FIG. 4 is a rear view of FIG. 1, FIGS. 4 and 5 are partially cutaway views of FIG. 1, and FIG.

Illustrated vehicle wiper arm blade 1
Is mainly composed of a wiper blade 2, a wiper arm 3, a blade cover 4, and an arm cover 5.

2 and 3, the wiper blade 2 is provided with a rubber rubber blade 2a having an elongated shape, and is disposed at four locations along the length of the blade rubber 2a. The blade rubber 2a is held by the provided lever yoke 2b. Lever yoke 2
b is rotatably connected to a primary blade lever 2d via a secondary blade lever 2c at two locations from both ends. At substantially the center of the primary blade lever 2d, there is provided a wiper arm mounting portion 2d1 having a shaft shape for mounting to a wiper arm 3 described later. The lever yoke 2b, the primary blade lever 2d, and the secondary blade lever 2c are all made of metal.

As apparent from FIGS. 2 and 3, the wiper arm 3 has an arm head 3a and an arm piece 3
The arm head 3a is provided with a retainer 3b provided with a b1 and an arm spring 3c for setting an arm pressure. The arm head 3a is attached to a lower end in FIG. 3 of a pivot shaft reciprocally rotated by power from a wiper motor (not shown). A pivot shaft mounting portion 3a1 having a hole shape is provided, and the other end of the arm head 3a is connected to one end of a retainer 3b via a rivet pin 3a2. Since the retainer 3b is connected to the other end of the arm head 3a via the rivet pin 3a2, the pivot shaft mounting portion 3a provided on the arm head 3a
In a state where the pivot shaft is fixed to 1, the retainer 3b pushes the wiper blade 2 against the wiping surface W shown in FIG. 2 to rotate in the counterclockwise direction in FIG. The other end of the retainer 3b is fixed to one end of an arm piece 3b1 formed in a substantially crank shape. The other end of the arm piece 3b1 has a U-shape as is clear from FIG. A wiper blade mounting portion 3b2 is provided for mounting a wiper arm mounting portion 2d1 of a primary blade lever 2d provided on the wiper blade 2 and formed as an integral part.

Since the wiper arm mounting portion 2d1 of the primary blade lever 2d provided on the wiper blade 2 has a shaft shape, and the wiper blade mounting portion 3b2 provided on the other end of the arm piece 3b1 has a U-shape. When the rubber 2a is pressed against the wiping surface W and deforms into a curved shape as shown by a virtual line in FIG.
Lever yoke 2b, secondary blade lever 2c,
Primary blade lever 2d is also blade rubber 2a
, The wiper blade 2 rotates with respect to the wiper arm 3 about the wiper arm mounting portion 3b2. The direction in which the wiper blade 2 rotates is orthogonal to the direction in which the wiper arm 3 reciprocates on the wiping surface W.

As is clear from FIG. 5, a hook insertion groove 3a having a hook locking pin 3a3 is provided near the other end of the arm head 3a and near the rivet pin 3a2.
One end of the connecting hook 3c1 is rotatably locked to the hook locking pin 3a3 in the hook insertion groove 3a4. The other end of the connecting hook 3c1 is rotatably locked to one end of the arm spring 3c, and the other end of the arm spring 3c is connected to the arm piece 3b.
1 is locked at one end. Arm spring 3c
Is connected to the arm head 3 in the tension state via the connecting hook 3c1.
a, and the wiper blade 2 is wiped by applying a pulling force to bias the retainer 3b and the arm piece 3b1 clockwise in FIG. Set the arm pressure for pressing against W. Retainer 3b, arm piece 3b1,
Arm head 3a, rivet pin 3a2, connecting hook 3
Both c1 and the arm spring 3c are made of metal.

On the other hand, a blade cover 4 is attached to the outside of the wiper blade 2. The blade cover 4
The length of the wiper blade 2 from one end side to the other end along the length direction has an outer shape slightly larger than the length of the wiper blade 2 and slightly larger than the width dimension of the wiper blade 2. Except for the lip portion 2a1 which is a contact portion of the rubber 2a with the wiping surface W, the rubber 2a has a shape that covers the lever yoke 2b, the secondary blade lever 2c, and the primary blade rubber 2d. It is molded as a thin wall.

The blade cover 4 has an opening on the front side in FIG. 3, and a small projection-like blade holder is provided at a position corresponding to the primary blade lever 2d provided on the wiper blade 2 on this opening side. 4c are provided at four positions. Since the opening side of the blade cover 4 is covered with the wiper blade 2 and the blade cover 4 is brought into contact with the primary lever 2d provided on the wiper blade 2, the blade retainers 4c are locked to the primary lever 2d. The blade cover 4 is attached to the wiper blade 2 in an inseparable manner. Since the blade cover 4 is attached to the wiper blade 2 so as to be inseparable from the wiper blade 2, when the blade rubber 2a of the wiper blade 2 is pressed against the wiping surface W and deforms into a curved shape as shown by a virtual line in FIG. The wiper arm 3 is rotated with respect to the wiper arm 3 integrally with the wiper blade 2 about the wiper arm mounting portion 3b2.

A wiper arm insertion hole 4d cut into a rectangular shape is provided substantially at the center of the blade cover 4 at the wiper arm 3 side. The arm piece 3b1 inserted into the wiper arm insertion hole 4d extends from the arm cover 5 described later.

On the other hand, an arm cover 5 is attached to the outside of the wiper arm 3. The arm cover 5 has a retainer side arm cover 5 a located outside the retainer 3 b provided on the wiper arm 3, An arm head side arm cover 5b located outside the provided arm head 3a, and a hinge side arm cover 5c located outside the connecting portion between the retainer 3b provided on the wiper arm 3 and the arm head 3a are provided. ing. The arm cover 5 is disposed slightly apart from the blade cover 4.

The retainer-side arm cover 5a has an outer shape slightly larger than the outer size of the retainer 3b. The base end covers the outer side of a portion near one end of the retainer 3b, and the distal end extends along the length direction of the retainer 3b. The blade cover 4 is formed so as to be extended corresponding to one end of the blade cover 4 and formed into a thin U-shape cross section with resin.

The retainer-side arm cover 5a has an opening on the near side in FIG. 3, and four small protrusion-shaped retainer retainers 5a1 are provided at positions corresponding to the retainers 3b on the opening side. Have been. After the opening side of the retainer-side arm cover 5a is covered with the retainer 3b, the retainer-side arm cover 5a is brought into contact with the retainer 3b, so that each of the retainer retainers 5a1 can retain the retainer 3b.
, The retainer-side arm cover 5a is attached to the retainer 3b in a non-separable and integral manner. The base side of the retainer-side arm cover 5a is a hinge-side arm cover mounting portion 5a2 that is open at a portion near one end of the retainer 3b.
It has become.

A wiper arm insertion hole 5a3 formed corresponding to the wiper arm insertion hole 4d provided in the blade cover 4 is provided on the wiper blade 2 side near the tip of the retainer side arm cover 5a.
The distal end side of the arm piece 3b1 provided on the wiper arm 3 is inserted into the retainer side arm cover 5a through the wiper arm insertion hole 5a3.

Further, the retainer side arm cover 5a
A friction portion 6 is provided on the side of the blade cover 4. The friction portion 6 is provided with the wiper blade 2
At the same distance from one end of the blade cover 4 to the other end of the blade cover 4 from the wiper arm mounting portion 3b2, and from the retainer side arm cover 5a to the blade cover 4 and to the blade cover 4. Sliding contact protrusion 6 projecting in the form of a small protrusion having a size to contact with
a, 6a. The sliding contact protrusions 6a, 6
a is the retainer side arm cover 5a to the blade cover 4
When the blade rubber 2a of the wiper blade 2 is pressed against the wiping surface W and deforms into a curved shape as shown by a virtual line in FIG.
When the blade cover 4 rotates integrally with the wiper blade 2 around the wiper arm 2 around the wiper arm mounting portion 3b2 in a direction orthogonal to the direction in which the wiper arm 3 reciprocates on the wiping surface W, the sliding contact protrusions 6a, 6a is slid while being in contact with the blade cover 4, so that it has a function of applying a frictional force to the blade cover 4 along the direction in which the wiper arm 3 reciprocates. Friction section 6
The sliding contact protrusions 6a are not limited to two as shown, but may be one, or may be provided on the blade cover 4.

The arm head side arm cover 5b has an outer shape slightly larger than the outer size of the arm head 3a. The base end covers the outside of the portion near one end of the arm head 3a, and the distal end has the length of the arm head 3a. It is formed to have a U-shaped cross section and is thinly formed of resin as extending in the direction and near the rivet pin 3a2 provided on the arm head 3a.

The arm head side arm cover 5b
In FIG. 3, the front side in FIG. 3 has an opening shape, and small protrusion-shaped arm head retainers 5b1 are provided at four positions at positions corresponding to the arm heads 3a on the opening side. After the opening side of the arm head side arm cover 5b is put on the arm head 3a, the arm head side arm cover 5b is brought into contact with the arm head 3a, whereby the arm head retainers 5b1 are locked to the arm head 3a. Therefore, the arm head-side arm cover 5b is attached to the arm head 3a in an inseparable manner. The distal end side of the arm head side arm cover 5b has a hinge side arm cover mounting portion 5 which is open at a portion near the other end of the arm head 3a.
b2.

The hinge side arm cover 5c is
outside the rivet pin 3a2 to which one end of the arm b is connected to the other end of the arm head 3a, the hinge-side arm cover attaching portion 5a2 of the retainer-side arm cover 5a and the hinge-side arm cover attaching portion of the arm head-side arm cover 3b. 5b2 is formed to have a U-shaped cross section and is thinly formed by rubber so as to close the gap therebetween. As shown in FIG. 5, the hinge-side arm cover 5c has
Movable part 5c that has a bellows shape and can expand and contract in the horizontal direction in the figure
The fixing tongues 5c2 and 5c2 each having a U-shape are provided at both ends of the bracket 1. The fixing tongues 5c2 and 5c2 rotate the retainer 3b clockwise in FIG. Only the upper side in the drawing, which is the proximity of the rivet pin 3a2 located near the center of rotation of the retainer-side arm cover 5a and the arm-head-side arm cover 5b that rotates together with the retainer 3b when locking back, is the retainer-side arm cover. 5a hinge-side arm cover mounting portion 5
a2 and the hinge-side arm cover mounting portion 5b2 of the arm head-side arm cover 5b are attached by an adhesive, and the front side and the rear side in the drawing are not mounted. 5c1 smoothly expands and contracts.

In the vehicle wiper arm blade 1 having such a structure, the pivot shaft mounting portion 3a1 provided on the arm head 3a of the wiper arm 3 is fixed to a pivot shaft (not shown) on the vehicle body side, and then the power of the wiper motor (not shown) is obtained. When the pivot shaft is reciprocated, the wiper arm 3 is pressed against the wiping surface W while the lip 2a1 of the blade rubber 2a provided on the wiper blade 2 is pressed against the wiping surface W by the arm pressure applied by the arm spring 3c of the wiper arm 3. In order to swing up and down, the blade rubber 2a of the wiper blade 2 wipes the wiping surface W between the upper reversal position A and the lower reversal position B.

When the blade rubber 2 a of the wiper blade 2 wipes the wiping surface W, the blade cover 4 covers the outside of the wiper blade 2, and the arm cover 5 covers the outside of the wiper arm 3. While performing the wiping operation, the blade cover 4 rotates together with the wiper blade 2 in accordance with the rotation of the blade rubber 2a following the curved state of the wiping surface W.

At this time, the blade rubber 2a of the wiper blade 2 is deformed into a curved shape corresponding to the wiping surface W, so that the wiper arm 3 moves in a direction orthogonal to the direction in which the wiper arm 3 reciprocates on the wiping surface W. Mounting part 3b
Blade cover 4 integral with wiper blade 2 around 2
Is rotated with respect to the wiper arm 3, the blade cover 4
Is provided with a frictional force along the reciprocating rotation direction of the wiper arm 3 by the sliding contact protrusions 6a, 6a.
The wiping operation is performed integrally with the wiper blade 2 in a state in which the wiper blade 2 slides on the arm cover 5 along the reciprocating rotation direction of.

[0031]

As described above, the wiper arm blade for a vehicle according to the present invention has the above-described structure. Therefore, the outside of the wiper blade is covered by the blade cover, and the outside of the wiper arm is parallel to the blade cover. The blade cover is disposed and covered by an arm cover integrally attached to the wiper arm, and the blade cover protrudes toward the arm cover and is pressed against the arm cover to generate a frictional force between the arm cover and the blade cover. A friction portion composed of a projection is provided. Therefore, when the wiper arm reciprocates on the wiping surface, the wiper blade slides on the wiping surface while sliding on the arm cover along the direction of rotation of the wiper arm due to the frictional force of the sliding contact projection of the friction portion. On the other hand, wiping is performed. Therefore, the wiping blade can be used for a long period of time by preventing rust from being generated on the metal part and preventing intrusion of mud and dust into the rotating part. By preventing the occurrence of the chattering phenomenon, a high quality can be obtained.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of a wiper arm blade for a vehicle according to the present invention.

FIG. 2 is a vertical right side view of the vehicle wiper arm blade shown in FIG. 1;

FIG. 3 is a rear view of the vehicle wiper arm blade shown in FIG. 1;

FIG. 4 is a sectional view taken along line CC of the vehicle wiper arm blade shown in FIG. 3;

5 is a cross-sectional view of a portion around a connecting portion between a retainer and an arm head in the vehicle wiper arm blade shown in FIG. 2;

FIG. 6 is an external view of the vehicle wiper arm blade shown in FIG. 1 in a state where the vehicle body is attached.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 Wiper arm blade for vehicle 2 Wiper blade 2a Blade rubber 3 Wiper arm 3a Arm head 3b Retainer 3b1 Arm piece 3c Arm spring 4 Blade cover 5 Arm cover 6 Friction portion 6a Sliding contact W W wiping surface

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hiroyuki Sato 1760 Higashimatano-cho, Totsuka-ku, Yokohama-shi, Kanagawa Pref. (56) References JP-A-2-241859 (JP, A) 62-145764 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B60S 1/04-1/44

Claims (2)

(57) [Claims] A wiper blade for holding a blade rubber for wiping a wiping surface; a retainer integrally formed at one end with an arm piece to which the wiper blade is rotatably mounted; A wiper arm having an arm head rotatably pivotally attached to the other end of the wiper arm, and an arm spring locked to the arm head and the retainer and capable of pressing the wiper blade against a wiping surface; A blade cover that covers the outside of the wiper blade and is integrally attached to the wiper blade; and an arm cover that covers the outside of the wiper arm and is arranged in parallel with the blade cover and integrally attached to the wiper arm. The arm cover is protruded toward the blade cover and pressed against the blade cover. The vehicle wiper arm-blade, wherein a friction part made of sliding protrusions cause friction between the arm cover and the blade cover is provided. 2. A wiper blade for holding a blade rubber for wiping a wiping surface, a retainer having an arm piece to which the wiper blade is rotatably mounted integrally formed at one end, and the retainer. A wiper arm having an arm head rotatably pivotally attached to the other end of the wiper arm, and an arm spring locked to the arm head and the retainer and capable of pressing the wiper blade against a wiping surface; A blade cover that covers the outside of the wiper blade and is integrally attached to the wiper blade; and an arm cover that covers the outside of the wiper arm and is arranged in parallel with the blade cover and integrally attached to the wiper arm. The blade cover is protruded toward the arm cover and pressed against the arm cover, Serial vehicular wiper arm-blade, wherein a friction part made of a sliding protrusion causing frictional force is provided between the arm cover and said blade.