JP2001322535A - Wiper blade - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiper blade for uniformizing the distribution of pressing force of blade rubber, by using the blade rubber made by extrusion molding to reduce a cost required for a metal mold and to prevent generation of a reversing sound, wiper judder and a rubbing sound. SOLUTION: This wiper blade having the blade rubber 9 has a holding part 9a formed by extrusion molding and gripped by a lever yoke 5, a pressure contact part 9i formed in an almost inverse isosceles triangle shape and brought into pressure contact with a wiping-out surface and a neck part 9b for joining the holding part 9a and the pressure contact part 9i, and is constituted such that the pressure contact part 9i is formed in a hollow shape, and the pressure contact part 9i is composed of first and second top plate parts 9d1 and 9d2 continuously connected to the neck part 9b, first and second side plate parts 9e1 and 9e2 continuously connected to the first and second top plate parts 9d1 and 9d2 and mutually connected by a top part 9i1 and first and second bending parts 9f1 and 9f2 formed in an inward bending shape in the respective side plate parts 9e1 and 9e2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiper blade for wiping a wiping surface of an automobile windshield glass or the like.

[0002]

2. Description of the Related Art In a wiper blade of this type, a pair of dies arranged in the longitudinal direction are used to form a blade rubber which is pressed against a wiping surface, and the dies are divided. It was molded by that.

[0003]

In the above-mentioned wiper blade, a molding method is used in which a pair of dies arranged in the longitudinal direction are divided, so that different dies are used for blade rubbers having different length dimensions. Is used, and as a result, there is a problem that the cost for the mold increases. In addition, the above wiper blade has a problem that a reversal sound is generated when the blade rubber changes its direction at the reversal position on the wiping surface. Further, in the above-mentioned wiper blade, since a tongue-shaped lip is formed at the tip of the blade rubber, so-called stick-slip easily occurs, and there is a problem that a wiper jada and a rubbing sound due to the stick-slip are generated. . Further, the above-mentioned wiper blade has a problem that the distribution of the pressing force over the entire blade rubber tends to be uneven.

[0004]

SUMMARY OF THE INVENTION A wiper blade according to the present invention uses an extruded blade rubber to reduce the cost of a mold, to prevent inversion noise, wiper judder and rubbing noise, and to push the blade rubber. It is an object of the present invention to provide a wiper blade capable of making pressure distribution uniform.

[0005]

Configuration of the Invention

[0006]

According to a first aspect of the present invention, there is provided a wiper blade including a blade lever rotatably coupled to a wiper arm, a lever yoke rotatably coupled to the blade lever, and a lever yoke. A wiper blade having a blade rubber connected to the
Blade rubber is formed by extrusion molding,
A holding portion gripped by the lever yoke, a substantially inverted isosceles triangle, a pressure contact portion pressed against the wiping surface, and a neck portion connecting the holding portion and the pressure contact portion, and the pressure contact portion is hollow And first and second top plate portions connected to the neck portion, and first and second side plate portions connected to the first and second top plate portions and connected to each other at a top portion. And first and second bent portions formed to be bent inward on the respective side plate portions.

In the wiper blade according to a second aspect of the present invention, in addition to the configuration of the first aspect, the neck portion is formed in a hollow shape continuously with the hollow pressure contact portion, and the neck portions are arranged in parallel with each other. It has a first and a second neck portion, wherein the first neck portion is connected to the first top plate portion, and the second neck portion is connected to the second top plate portion. And

[0008] In the wiper blade according to claim 3 of the present invention, the press contact portion and the neck portion are continuously formed in a hollow shape,
The press-contact portion is composed of a top plate portion connected to the neck portion and a pair of side plate portions connected to the top plate portion and connected to each other at a top portion, and the pair of side plate portions has a thin plate near the top portion. It is characterized in that it is formed.

In the wiper blade according to a fourth aspect of the present invention, in addition to any one of the first, second and third aspects, the press contact portion has a cut portion cut after forming to form a top portion on the side plate portion. Is formed.

In the wiper blade according to a fifth aspect of the present invention, in addition to any one of the first, second and third aspects, the pressing portion has a cut portion which is cut at the time of molding to form a top portion on the side plate portion. Is formed.

[0011]

In the wiper blade according to the present invention, the pressure contact portions of the blade rubber include a first and a second top plate portion, a first and a second side plate portion, and a first and a second bent portion. And is integrally formed by extrusion molding. Therefore, blade rubbers with different length dimensions can be produced very easily. Also, when the blade rubber falls down when the blade rubber changes direction at the reversing position on the wiping surface, the blade is formed by a pair of bent portions formed by bending a part of each of the pair of side plate portions. Since the vertical movement of the rubber is suppressed, no reverse sound is generated at the reverse position, and the distribution of the pressing force over the entire blade rubber becomes uniform. Since the blade rubber has no lip formed at the wiping surface pressure contact portion, no stick-slip occurs and no wiper jada or rubbing noise is generated.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION

[0013]

1 to 5 show a first embodiment of a wiper blade according to the present invention.

The illustrated wiper blade 1 includes a blade lever 2, a first lever yoke 3, a second lever yoke 4, a third lever yoke 5, a fourth lever yoke 6, a fifth lever yoke 7, and a 6 is comprised of a lever yoke 8, a blade rubber 9, a first vertebra 10, and a second vertebra 11.

The blade lever 2 is disposed at the center of the wiper blade 1. The blade lever 2 has a wiper arm connecting portion 2b formed substantially at the center of the lever main body 2a. The wiper arm connecting portion 2b is provided with a wiper blade mounting portion 12 formed at the tip of the wiper arm 12.
a is rotatably connected to a through a clip 13. A pivot shaft that reciprocates and rotates by the power of a wiper motor (not shown) is screwed to the base end of the wiper arm 12. When the wiper motor is operated, the wiper arm 12 reciprocates on the wiping surface 50 shown in FIG.

At the end of the blade lever 2, first and second
Lever yoke coupling portions 2c and 2d are formed respectively. First lever yoke coupling part 2 arranged at one end
A blade lever coupling portion 3b formed at a substantially central portion of the first lever yoke 3 is rotatably coupled to c. 2nd lever yoke coupling part 2d arranged at the other end
, A blade lever connecting portion 4b formed substantially at the center of the second lever yoke 4 is rotatably connected.

The first lever yoke 3 includes a yoke body 3
The blade lever connecting portion 3b is arranged at a substantially central portion of a. A third lever yoke connecting portion 3c is formed at one end of the yoke main body 3a. A lever yoke connecting portion 5b formed substantially at the center of the third lever yoke 5 is rotatably connected to the third lever yoke connecting portion 3c.

The first lever yoke 3 includes a yoke body 3
A fourth lever yoke coupling portion 3d is formed at the other end of the portion a. A lever yoke connecting portion 6b formed substantially at the center of the fourth lever yoke 6 is rotatably connected to the fourth lever yoke connecting portion 3d.

The third lever yoke 5 includes a yoke body 5
A lever yoke connecting portion 5b is arranged at a substantially central portion of a. A first blade rubber grip 5c is formed at one end of the yoke main body 5a. A second blade rubber grip 5d is formed at the other end of the yoke main body 5a.

The fourth lever yoke 6 includes a yoke body 6
A lever yoke coupling portion 6b is arranged at a substantially central portion of a. A third blade rubber holding portion 6c is formed at one end of the yoke main body 6a. A fourth blade rubber grip 6d is formed at the other end of the yoke main body 6a.

The second lever yoke 4 includes a yoke body 4
The blade lever connecting portion 4b is arranged at a substantially central portion of a. A fifth lever yoke coupling portion 4c is formed at one end of the yoke main body 4a. A lever yoke connecting portion 7b formed substantially at the center of the fifth lever yoke 7 is rotatably connected to the fifth lever yoke connecting portion 4c.

The second lever yoke 4 includes a yoke body 4
A sixth lever yoke coupling portion 4d is formed at the other end of the line a. A lever yoke connecting portion 8b formed substantially at the center of the sixth lever yoke 8 is rotatably connected to the sixth lever yoke connecting portion 4d.

The fifth lever yoke 7 has a yoke body 7
A lever yoke coupling portion 7b is arranged at a substantially central portion of a. A fifth blade rubber grip 7c is formed at one end of the yoke main body 7a. A sixth blade rubber grip 7d is formed at the other end of the yoke main body 7a.

The sixth lever yoke 8 includes a yoke body 8
A lever yoke coupling portion 8b is arranged at a substantially central portion of a. At one end of the yoke main body 8a, a seventh blade rubber holding portion 8c is formed. At the other end of the yoke main body 8a, an eighth blade rubber holding portion 8d is formed.

The first blade rubber grip 5c of the third lever yoke 5 is C-shaped. As shown in FIG. 2, the first blade rubber holding portion 5c has
A base 5c1, a first arm 5c2, a second arm 5c3, a first projecting piece 5c4, and a second projecting piece 5c5 are provided.

The base 5c1 is formed in a plate shape whose center is continuous with the yoke main body 5a. When the wiper blade 1 is pressed against the wiping surface 50, the top wall 9a0 provided on the holding portion 9a of the blade rubber 9 comes into contact with the base 5c1. When the top wall 9a0 abuts on the base 5c1, the holding portion 9a is prevented from tilting with respect to the wiping surface 50.

The first and second arms 5c2 and 5c3 are formed by being bent at approximately 90 degrees from the end of the base 5c1 toward the wiping surface 50. First and second arms 5
c2 and 5c3 are lever yoke locking portions 10d and 1d formed on the first and second vertebras 10 and 11, respectively.
1d, respectively.

The first and second protruding pieces 5c4, 5c5 are formed by being bent at substantially 90 degrees in directions facing the distal ends of the first and second arms 5c2, 5c3, respectively. The first and second projecting pieces 5c4, 5c5 are provided on first and second lever grooves 9c1, 9c provided on the blade rubber 9, respectively.
2 has a function of gripping the blade rubber 9 so as not to come off from the third lever yoke 5.

Although not shown here, the second blade rubber grip 5d of the third lever yoke 5 has a base, a first arm, and a second arm similar to the first blade rubber grip 5c. Arm, a first protruding piece, and a second protruding piece are provided respectively, but the first arm and the second arm are formed on the first and second vertical brassiere 10, 11, respectively. It is not inserted into each of the lever yoke locking portions 10d and 11d.

Although not shown here, the third blade rubber gripper 6c of the fourth lever yoke 6 has a base, a first arm, and a second arm similar to the second blade rubber gripper 5d. , A first protruding piece, and a second protruding piece.

Although not shown here, the fourth blade rubber gripper 6d of the fourth lever yoke 6 has a base, a first arm, and a second arm similar to the second blade rubber gripper 5d. , A first protruding piece, and a second protruding piece.

Although not shown here, the fifth blade rubber gripping portion 7c of the fifth lever yoke 7 has a base portion, a first arm portion, and a second arm portion, similarly to the second blade rubber gripping portion 5d. , A first protruding piece, and a second protruding piece.

Although not shown here, the sixth blade rubber holding portion 7d of the fifth lever yoke 7 has a base portion, a first arm portion, and a second arm portion in the same manner as the second blade rubber holding portion 5d. , A first protruding piece, and a second protruding piece.

Although not shown here, the seventh blade rubber gripping portion 8c of the sixth lever yoke 8 has a base, a first arm, and a second arm similar to the second blade rubber gripping portion 5d. , A first protruding piece, and a second protruding piece.

Although not shown here, the eighth blade rubber gripper 8d of the sixth lever yoke 8 has a base, a first arm, and a second arm similar to the second blade rubber gripper 5d. , A first protruding piece, and a second protruding piece.

The blade rubber 9 has a holding portion 9a,
The vertical bar housing 9a1, the second vertical bar housing 9a2, the neck 9b, the first lever groove 9c1, the second lever groove 9c2, and the wiping surface pressure contact portion 9i are integrally formed by extrusion molding. The wiping surface pressure contact portion 9i includes a first top plate portion 9d1, a second top plate portion 9d2, and a first side plate portion 9e.
1, a second side plate portion 9e2, a first bent portion 9f1, a second bent portion 9f2, a first hollow portion 9g, and a second hollow portion 9h.

The holding section 9a has a rectangular cross section. The holding portion 9a is provided with a ceiling wall 9 disposed at an upper end thereof.
a0 comes into contact with the base 5c1 of the first blade rubber grip 5c of the third lever yoke 5, and the second blade rubber grip 5d of the third lever yoke 5, the fourth Third blade rubber gripper 6c of lever yoke 6, fourth blade rubber gripper 6d of fourth lever yoke 5, fifth blade rubber gripper 7c of fifth lever yoke 7, fifth lever yoke 7 of 6
The blade rubber gripping portion 7d, the seventh blade rubber gripping portion 8c of the sixth lever yoke 8, and the base of the eighth blade rubber gripping portion 8d of the sixth lever yoke 8 respectively come into contact with each other. I have.

The first and second vertical brass accommodations 9a1,
9a2 are formed on both side edges of the holding portion 9a. First and second vertebra housings 9a1, 9a2
Is formed by extrusion molding, it is arranged so as to penetrate in the length direction of the holding portion 9a, and has the same length dimension as the holding portion 9a. First and second vertical brass accommodating portions 9a1,
The first and second vertebras 10 and 11 are accommodated in 9a2, respectively.

The neck 9b is arranged below the holding portion 9a. The neck portion 9b is located between the first hollow portion 9h and the first hollow portion 9h.
And the second neck 9b2. The base ends of the first and second necks 9b1 and 9b2 are connected to the holding portion 9a. As shown in FIG. 3, the center line a1 of the first neck 9b1 and the center line a of the second neck 9b2
Each of 2 is offset from the top 9i1 of the wiping surface pressure contact portion 9i with respect to a center line a3 passing through the center of the second hollow portion 9h. First and second necks 9b1, 9
Since the b2 is offset with respect to the top 9i1 of the wiping surface pressing portion 9i, a function of preventing the holding portion 9a from moving up and down when the wiping surface pressing portion 9i is pressed against the wiping surface 50 and tilts. Have.

The first and second lever grooves 9c1 and 9c2 are
A lower end portion of the holding portion 9a and first and second neck portions 9b1, 9b
2 and the first and second top plates 9d1 and 9d2 are formed in a U-shaped groove shape.

The first and second lever grooves 9c1 and 9c2 are provided with first and second projecting pieces 5c4 and 5c formed on the first blade rubber holding portion 5c of the third lever yoke 5.
5, projecting pieces formed on the second blade rubber gripping portion 5d of the third lever yoke 5, and formed on the third and fourth blade rubber gripping portions 6c, 6d of the fourth lever yoke 6, respectively. Projecting pieces, projecting pieces formed on fifth and sixth blade rubber gripping portions 7c and 7d of fifth lever yoke 7, and seventh and eighth pieces of sixth lever yoke 8, respectively.
The protruding pieces formed on the blade rubber gripping portions 8c and 8d are inserted.

The wiping surface pressure contact portion 9i is formed in an inverted isosceles triangular shape, and includes a first top plate portion 9d1 and a second top plate portion 9d1.
Top plate portion 9d2, first side plate portion 9e1, second side plate portion 9
e2, the first bent portion 9f1, the second bent portion 9f2, the first
And a second hollow portion 9h. The wiping surface pressing portion 9i is not a conventional tongue-like lip which is bent and pressed against the wiping surface 50.

The first and second top plate portions 9d1 and 9d2 form the top portion of the wiping surface pressure contact portion 9i via the second hollow portion 9h. The first and second top plates 9d1 and 9d2 extend laterally from the distal ends of the first and second necks 9b1 and 9b2.

The first and second side plates 9e1 and 9e2 form both sides of an isosceles side. First and second side plate portions 9e
1, 9e2 is a top 9i at an angle of inclination of approximately 60 degrees from the tip of each of the first and second top plates 9d1, 9d2.
Each extends to 1.

The first and second bent portions 9f1 and 9f2 are arranged substantially at the center of the first and second side plate portions 9e1 and 9e2. The first and second bent portions 9f1 and 9f2 are provided on the first and second side plates 9e1 and 9e2 as compared with the case where the first and second side plates 9e1 and 9e2 are flat. , The top 9i from the tip of the second top plate 9d1, 9d2.
It is bent so as to increase the length dimension up to 1.

As shown in FIGS. 3, 4, and 5, the first
Of the first, second and third nodes 9f3, 9f
f4 and 9f5 are formed respectively. The third bent portion 9f2 includes third, fourth, and fifth nodes 9f6, 9f7, 9
f8 are formed.

As shown in FIG. 4, the first and second bent portions 9f1 and 9f2 are used when the blade rubber 9 falls down when the blade rubber 9 changes direction at the reversal position on the wiping surface 50. The first, second, and third nodes 9f3, 9f4, and 9f5 of the first bent portion 9f1 are each elastically deformed to have a small bending angle, and the fourth, fifth, and fifth portions of the second bent portion 9f2 are elastically deformed. The sixth nodes 9f6, 9f7, and 9f8 elastically deform the bending angles so as to make the distribution of the pressing force uniform throughout the blade rubber 9 so that the blade rubber 9 turns in the reverse position on the wiping surface 50. It has a function to suppress up and down movement when it falls down when changing.

The top 9i1 of the wiping surface pressing portion 9i is
Pressed to zero. The top 9i1 is chosen at any angle between 60 and 90 degrees.

The first hollow portion 9g includes first and second top plate portions 9d1 and 9d2, first and second side plate portions 9e1 and 9e2,
It is a space surrounded by the first and second bent portions 9f1 and 9f2, and is formed to penetrate the entire length of the blade rubber 9.

The second hollow portion 9h is provided with the first and second neck portions 9h.
b1 and 9b2, the base end of which is
a, and the tip is formed to communicate with the first hollow portion 9g at the tip of the first and second necks 9b1 and 9b2.
The second hollow portion 9h has a function of allowing the first and second neck portions 9b1 and 9b2 to bend independently of each other with respect to the holding portion 9a.

The first and second hollow portions 9g and 9h have a function of preventing the rigidity of the wiping surface pressure contact portion 9i from becoming unnecessarily high. Therefore, the first and second hollow portions 9g, 9h
Accordingly, when the wiper blade 1 is inverted at the inverted position on the wiping surface 50, the inverted sound generated by the wiping surface pressing portion 9i is reduced.

The wiping surface pressing portion 9i is provided with the second
The cut portion 9 shown in FIG.
i2 is formed. After extrusion molding, the cut part 9i2
Is cut, the first side plate portion 9e1, the second side plate portion 9e1,
A top 9i1 selected at an arbitrary angle between 60 degrees and 90 degrees is formed at the center of the side plate 9e2.

As shown in FIG. 2, the first vertical bra 10 is provided with a thin plate-shaped vertical bra main body 10a. At one end of the vertical bra main body 10a,
A first retaining portion 10b bent in an L shape from the vertical bra main body 10a is formed. Vertical bra main body 10
At the other end of a, a second retaining portion 10c is formed, which is bent in an L-shape from the vertical bra main body 10a.

The first and second retaining portions 10b and 10c are arranged at the longitudinal end of the holding portion 9a when the vertical vertebra main body 10a is received in the first vertical bar receiving portion 9a1 of the holding portion 9a. First and second end faces 9a5, 9a6
Has the function of preventing the first vertebra 10 from coming off in the longitudinal direction of the blade rubber 9 by being locked.

The vertical bar body 10a of the first vertical bar 10 has a lever yoke locking portion 10d, an elastic portion 10
e are formed respectively.

The lever yoke engaging portion 10d is formed in a concave shape near the first retaining portion 10b on the vertical bra main body 10a. This lever yoke locking portion 10d has
When the vertical bra main body 9a is accommodated in the first vertical bra accommodating portion 9a1 of the holding portion 9a, a first blade rubber gripping portion 5c of the third lever yoke 5 is formed.
Is inserted.

The elastic portion 10e is connected to the lever yoke locking portion 10
d. The elastic portion 10e presses the lever yoke locking portion 10d toward the first arm 5c2 of the first blade rubber grip 5c of the third lever yoke 5.

As shown in FIG. 2, the second vertebra 11 has a thin plate-shaped vertebra main body 11a. At one end of the vertical bra main body 11a,
A first retaining portion 11b bent in an L shape is formed from the vertical bra main body 11a. Vertical Bra 11
At the other end of a, a second retaining portion 11c is formed which is bent in an L-shape from the vertical bra main body 11a.

The first and second retaining portions 11b and 11c are disposed at the longitudinal ends of the holding portion 9a when the vertical vertebra body 11a is received in the first vertical portion 9a1 of the holding portion 9a. First and second end faces 9a5, 9a6
Has the function of preventing the second vertebra 11 from coming off in the longitudinal direction of the blade rubber 9 by being locked.

Similarly to the first vertebra 10, the second vertebra 11 has a lever yoke engaging portion 11d,
Elastic portions 11e are respectively formed. The second arm portion 5c3 of the first blade rubber grip portion 5c of the third lever yoke 5 is inserted into the lever locking portion 11d of the second vertebra 11. The elastic portion 11e presses the lever yoke locking portion 11d toward the second arm 5c3 of the first blade rubber grip 5c of the third lever yoke 5.

The first and second vertebras 10, 11 are:
The holding portion 9a is housed in the first and second vertibra housing portions 9a1 and 9a2, respectively, so that the wiping surface 50
An elastic repulsive force is applied to the holding portion 9a so as to bend uniformly according to the bending state of the holding member 9a. First and second vertical bra 1
0 and 11 prevent the blade rubber 9 from coming off in the length direction.

The first and second vertebras 10, 11 are:
The vertical bra main bodies 10a, 11a are the first of the holding portions 9a,
The first and second retaining portions 10b and 10c of the first vertebra 10 are accommodated in the second vertebra bra accommodation portions 9a1 and 9a2, respectively.
While being locked to the second end faces 9a5, 9a6, respectively.
First and second retaining portions 11b of the second vertebra 11,
11c is the first and second end faces 9a5, 9a6 of the holding portion 9a.
The blade rubber 9
Is prevented in the length direction.

Then, from the left side in FIG. 1 of the assembly comprising the blade rubber 9 and the first and second vertebras 10 and 11, the first and second blade rubber gripping portions 5c of the third lever yoke 5 are provided. , 5d, the third and fourth blade rubber gripping portions 6c, 6d of the fourth lever yoke 6, and the fifth and sixth blade rubber gripping portions 7c, 7 of the fifth lever yoke 7.
d, the seventh and eighth blade rubber gripping portions 8c and 8d of the sixth lever yoke 8 are passed through the holding portion 9a of the blade rubber 9, and the first blade rubber gripping portion of the third lever yoke 5 at the tip end. First and second arm portions 5c formed on 5c
2 and 5c3 are inserted and locked in the lever yoke locking portions 10d and 11d of the first and second vertebras 10 and 11, respectively. The third, fourth, fifth, and sixth lever yokes 3, 4, 5, 6, 7, 8 are positioned and assembled.

The wiper blade 1 has a first and a second arrangement which are surrounded by a pair of top plates 9d1 and 9d2, a pair of side plates 9e1 and 9e2, and a pair of bent portions 9f1 and 9f2. Blade rubber 9 having hollow portions 9g and 9h is integrally formed by extrusion molding. Therefore, blade rubbers with different length dimensions can be produced very easily.

Further, since the blade rubber 9 is formed by extrusion molding, even if the first and second vertebra rubber housing portions 9a1 and 9a2 are formed in a penetrating shape, the first vertebra rubber housing portion 9a1 of the blade rubber 9 is formed. The first vertebra 10 accommodated in the first and second retaining portions 10b, 1
0c, the second rubber store 9a of the blade rubber 9 holds the second rubber.
Since the second vertebra 11 accommodated in the second 2 is retained by the blade rubber 9 by the first and second retaining portions 11b, 11c, the first and second vertebras 10, 11
Does not fall off the blade rubber 9.

When the wiper arm 12 swings on the wiping surface 50, the blade rubber 9 moves the blade lever 2, the first, second, third, fourth, fifth and sixth lever yokes 3. Wiping surface 5 integrally with 4, 5, 6, 7, 8
0, and is moved by the elastic force of an arm spring (not shown) built in the wiper arm 12 to press against the wiping surface 9i.
Is pressed against the wiping surface 50 to wipe and move the rainwater on the wiping surface 50. At this time, the blade rubber 9
The rainwater on the wiping surface 50 is splashed by the wiping surface pressing portion 9i without being caught between the wiping surface pressing portion 9i and the wiping surface 50, so that it is thin on the wiping surface 50 after the wiping surface pressing portion 9i has passed. No water film is formed. Of course, wiping surface 5
Even if the water-repellent film is coated on the surface 0 and the rainwater on the wiping surface 50 has become water droplets, the rainwater is similarly splashed off by the wiping surface pressing portion 9i.

Further, when the blade rubber 9 changes its direction at the reversal position on the wiping surface 50, the blade rubber 9
Is folded, a pair of bent portions 9f1 and 9f formed by bending a part of each of the pair of side plate portions 9e1 and 9e2.
2, the vertical movement of the blade rubber 9 is suppressed, so that no reversal sound is generated at the reversal position, and the distribution of the pressing force over the entire blade rubber 9 becomes uniform.
Since the blade rubber 9 does not have a tongue-shaped lip formed on the wiping surface pressure contact portion 9i, stick slip does not occur, and no wiper jada or rubbing noise is generated.

FIG. 6 shows a second embodiment of the wiper blade according to the present invention.

In this case, the blade rubber 9 does not have the first and second bent portions 9f1 and 9f2 of the first embodiment, and is closer to the tip of the first and second side plate portions 9e1 and 9e2. In addition, first and second thin portions 9e3 and 9e4 formed to be smaller than the plate thickness of the first and second side plate portions 9e1 and 9e2 are formed, and the first and second thin portions 9e3 and 9e3 are formed. The top 9i1 is arranged at the end of 9e4.

The first hollow portion 9g is surrounded by first and second top plate portions 9d1 and 9d2, first and second side plate portions 9e1 and 9e2, and first and second thin portions 9e3 and 9e4. It is formed. The second hollow portion 9h includes the first and second neck portions 9h.
b1, 9b2, the base end reaches the middle part of the first and second necks 9b1, 9b2, and the front end is the first end at the front end of the first and second necks 9b1, 9b2. Is formed so as to communicate with the hollow portion 9g. Other parts are the same as in the first embodiment.

The first and second thin portions 9e3 and 9e4 are not the entire wiping surface pressure contact portion 9i but the first and second side plate portions 9e.
1, 9e2 has a function of intensively lowering the stiffness near the distal end. When the blade rubber 9 falls at the reversal position on the wiping surface 50 when the blade rubber 9 changes direction, the first and second thin portions 9e3 and 9e4 suppress the vertical movement of the blade rubber 9. In addition, no inversion sound is generated at the inversion position, and the distribution of the pressing force over the entire blade rubber 9 becomes uniform.

FIG. 7 shows a third embodiment of the wiper blade according to the present invention.

In this case, the blade rubber 9 does not have the first and second bent portions 9f1 and 9f2 of the first embodiment, and the first and second bent portions 9f1 and 9f2 are similar to the second embodiment. Side plate 9
The first and second side plate portions 9e are located closer to the distal end portions of e1 and 9e2.
First and second thin portions 9e3 and 9e4 are formed to be smaller than the plate thickness of the first and second thin portions 9e3 and 9e4, and a top portion 9i1 is disposed at an end of the first and second thin portions 9e3 and 9e4. Have been.

The first hollow portion 9g is formed with the first and second top plate portions 9d1 and 9d2 in the same manner as in the second embodiment.
Side plate portions 9e1, 9e2 and first and second thin portions 9e3, 9
e4. And the 2nd hollow part 9h is arrange | positioned between the 1st, 2nd neck parts 9b1 and 9b2, the base end reaches the holding | maintenance part 9a, and the front-end | tip part becomes 1st, 2nd neck 9b1,. 9b2 is formed so as to communicate with the first hollow portion 9g at the tip end. 9h of 2nd hollow part
Correspond to the first and second necks 9b1, 9b with respect to the holding portion 9a.
2 have a function to bend independently. Other parts are the same as in the first embodiment.

The first and second thin portions 9e3 and 9e4 are not the entire wiping surface pressure contact portion 9i but the first and second side plate portions 9e.
1, 9e2 has a function of intensively lowering the stiffness near the distal end. When the blade rubber 9 falls at the reversal position on the wiping surface 50 when the blade rubber 9 changes direction, the first and second thin portions 9e3 and 9e4 suppress the vertical movement of the blade rubber 9. In addition, no inversion sound is generated at the inversion position, and the distribution of the pressing force over the entire blade rubber 9 becomes uniform.

FIG. 8 shows a third embodiment of the wiper blade according to the present invention.

In this case, the blade rubber 9 does not have the second hollow portion 9h of the first embodiment. The first hollow portion 9g includes first and second top plate portions 9d1 and 9d2, first and second side plate portions 9e1 and 9e2, and first and second bent portions 9d.
f1 and 9f2. Other parts are the same as in the first embodiment.

The first hollow portion 9g has a function of preventing the rigidity of the wiping surface pressure contact portion 9i from becoming unnecessarily high.
Therefore, when the wiper blade 1 reverses at the reverse position on the wiping surface 50, the first hollow portion 9g reduces the reverse noise generated by the wiping surface press contact portion 9i.

[0079]

As described above, according to the wiper blade according to the present invention, the pressure contact portions of the blade rubber include the first and second top plates, the first and second side plates, It is formed integrally by extrusion molding into a hollow shape surrounded by the first and second bent portions. Therefore, blade rubbers having different length dimensions can be formed very easily, and the cost for the mold can be reduced. Also, when the blade rubber falls down when the blade rubber changes direction at the reversing position on the wiping surface, the blade is formed by a pair of bent portions formed by bending a part of each of the pair of side plate portions. Since the vertical movement of the rubber is suppressed, no reversing sound is generated at the reversing position, and the distribution of the pressing force over the entire blade rubber can be made uniform. As a result, good wiping characteristics can be obtained. . And in the blade rubber,
Since the tongue-shaped lip is not formed on the wiping surface pressure contact portion, there is provided an excellent effect that a quiet wiping operation can be performed without causing a stick-slip, generating a wiper judder or a rubbing sound. .

[Brief description of the drawings]

FIG. 1 is a front view of a first embodiment of a wiper blade according to the present invention.

FIG. 2 is an external perspective view for explaining an assembling relationship of a blade rubber, a vertebra, and a lever yoke in the wiper blade shown in FIG.

FIG. 3 is a side view of a blade rubber used for the wiper blade shown in FIG.

FIG. 4 is a side view when the wiper blade shown in FIG. 3 is tilted during a wiping operation.

FIG. 5 is a side view of the blade rubber used in the wiper blade shown in FIG. 1 during molding.

FIG. 6 is a side view of a blade rubber used in a second embodiment of the wiper blade according to the present invention.

FIG. 7 is a side view of a blade rubber used in a third embodiment of the wiper blade according to the present invention.

FIG. 8 is a side view of a blade rubber used in a fourth embodiment of the wiper blade according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 wiper blade 2 blade lever 5 (lever yoke) third lever yoke 6 (lever yoke) fourth lever yoke 7 (lever yoke) fifth lever yoke 8 (lever yoke) sixth lever yoke 9 blade rubber 9a Holding part 9b Neck part 9d1 First top plate part 9d2 Second top plate part 9e1 First side plate part 9e2 Second side plate part 9f1 First bent part 9f2 Second bent part 9g First hollow part 9h 2nd hollow part 9i (pressure contact part) Wiping surface pressure contact part 9i2 cut part 12 wiper arm

Claims (5)

[Claims] 1. A wiper blade comprising: a blade lever rotatably coupled to a wiper arm; a lever yoke rotatably coupled to the blade lever; and a blade rubber coupled to the lever yoke. The blade rubber is formed by extrusion molding, a holding portion gripped by the lever yoke, a substantially inverted isosceles triangular shape, a pressure contact portion pressed against the wiping surface,
A neck portion for coupling the holding portion and the pressure contact portion, wherein the pressure contact portion is formed in a hollow shape, the pressure contact portion is connected to the neck portion, a first and a second top plate portion; First and second side plate portions connected to the first and second top plate portions and connected to each other at a top portion, and first and second folds formed by bending the respective side plate portions inward. A wiper blade comprising a curved portion. 2. A neck portion is formed in a hollow shape continuously with a hollow pressure contact portion, and the neck portions are arranged in parallel with each other.
2. The apparatus according to claim 1, further comprising a second neck, wherein the first neck is connected to the first top plate, and the second neck is connected to the second top plate. The wiper blade according to 1. 3. A wiper blade comprising: a blade lever rotatably coupled to a wiper arm; a lever yoke rotatably coupled to the blade lever; and a blade rubber coupled to the lever yoke. The blade rubber is formed by extrusion molding, a holding portion gripped by the lever yoke, a substantially inverted isosceles triangular shape, a pressure contact portion pressed against the wiping surface,
The holding portion and a neck portion that couples the pressure contact portion, the pressure contact portion and the neck portion are continuously formed in a hollow shape, the pressure contact portion, a top plate portion connected to the neck portion, A wiper blade comprising a pair of side plate portions connected to the top plate portion and connected to each other at a top portion, wherein the pair of side plate portions are formed to have a small thickness near the top portion. 4. The wiper blade according to claim 1, wherein a cut portion cut after forming to form a top portion on the side plate portion is formed in the press contact portion. . 5. The wiper blade according to claim 1, wherein a cut portion cut at the time of molding is formed in the press contact portion to form a top portion on the side plate portion. .