JPS6241893B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automobile windshield wiper.

Windshield wipers are used to improve visibility by wiping rain and snow off the front and rear windows of automobiles. To take an example of a normal windshield wiper, the central part of a blade lever bent in a dogleg shape is connected to the tip of an arm piece that swings from side to side so that it can swing vertically using a connecting pin in the width direction. , the central part of a lever yoke bent in a "dog" shape is connected to both ends of this blade lever so as to be able to swing vertically by a connecting pin in the width direction, and further formed at both ends of each of the two lever yokes. The side edge of the buckling of the blade rubber is engaged with a total of four engagement grooves so that it can slide forward and backward, and as the arm piece swings, the blade lever and lever yoke are connected to the car window glass. The blade rubber swings up and down depending on the degree of curvature, and the blade rubber is curved to a desired curvature so that it is always in close contact with the surface of the window glass.

However, in the above-mentioned conventional windshield wiper, the wiper blade has a blade lever,
It consists of a lever yoke, bucking, blade rubber, connecting pin that connects the blade lever and lever yoke, etc., and has a large number of component parts.
It has drawbacks such as a complicated structure, troublesome assembly, and high manufacturing costs.

This invention significantly reduces the number of parts by omitting the conventional blade lever and lever yoke by changing the material and shape of the conventional bucking and making the buckling function as a blade lever and lever yoke. It has a simplified structure.

That is, the present invention includes a bucking part that is made of an elastic plate and is in contact with the upper surface of the head of the blade rubber and is curved in an arc shape, and a buckling part that protrudes from both side edges of the bucking part toward the center of curvature of the arc and is in contact with the upper surface of the head of the blade rubber. A blade lever is formed by attaching a blade rubber using the claw pieces to a rubber holder equipped with a plurality of claw pieces that hold the side surface of the head, and a blade lever is provided in the center of the blade lever so that it can swing from side to side. An automobile windshield wiper is characterized in that the ends of the arms are connected by a connecting pin in the width direction.

A first embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

In FIG. 1, arm 1 includes an arm piece 2 that swings left and right (in a direction perpendicular to the paper) about a left fulcrum (not shown), and a clip fixed to the tip of arm piece 2. It consists of 3,
A rubber holder 4 is attached to the downward protruding end of this clip 3.
The center portion of an arc-shaped wiper blade 6 consisting of a blade rubber 5 and a blade rubber 5 is connected by a connecting pin 7 so as to be able to swing vertically. Rubber holder 4 above
is made of a thin spring steel plate, and as shown in FIGS. 2 and 3, the head 5 of the blade rubber 5 is
The buckling part 4a is provided with a buckling part 4a in contact with the upper surface of the blade rubber 5, and claw pieces 4b protrude from both side edges of the buckling part 4a to hold the sides of the head 5a of the blade rubber 5. It is curved so that the claw piece 4b faces the center of curvature of the arc, and is made by forming a band-like spring steel plate into a channel shape and providing a gap 4c by a cut in the side plate part. It is formed.
On the other hand, the blade rubber 5 has a head 5a that is thicker in the vertical direction than normal blade rubber, and the tip hook of the claw piece 4b of the rubber holder 4 is fitted into the lower end of the head 5a. Groove 5 for
b is provided in the length direction.

In the above structure, when the arm 1 is biased toward the surface of the window glass by a spring (not shown), the clip 3 and the rubber holder 4
The blade rubber 5 is pressed against the window glass surface through the blade rubber 5, and the blade rubber 5 swings left and right on the window glass surface as the arm 1 swings left and right. At this time, since the rubber holder 4 is made of a thin spring steel plate and a gap 4c is provided between the claw pieces 4b, the radius of curvature of the bucking portion 4a must be set in advance to be smaller than the radius of curvature of the window glass. As a result, the bucking part 4a is stretched according to the surface shape of the window glass, and the wiping part 5c of the blade rubber 5 is brought into close contact with the window glass surface almost uniformly, so that rain and snow on the window glass surface are evenly wiped off. In addition, the claw piece 4 of the rubber holder 4
The size and number of b and the size of the gap 4c are as follows:
Of course, it is set appropriately depending on the thickness of the spring steel plate, the curvature of the window glass, etc.

In the second embodiment shown in FIGS. 4 to 6, the wiper blade 6 is positioned on the side of the arm 1, and the clip 8 and the wiper blade 6 are connected by a connecting pin 9 that is long in the width direction. A stopper 10 made of rubber is provided protruding from the side surface of the wiper blade 6 and comes into contact with the claw piece 4b of the rubber holder 4, thereby suppressing swinging of the wiper blade 6 in the width direction (direction of arrow P). A small-diameter stepped portion 9a is provided at the base of the connecting pin 9, and by engaging the leaf spring 11 fixed to the clip 8 with this stepped portion 9a, the clip 8 and the connecting pin 9 are connected. They are detachably connected.

Next, the third embodiment will be explained with reference to FIGS. 7 to 9.
A circular hole 4d that communicates with the gap 4c is bored in the side edge of a (see FIG. 9) to prevent stress concentration. Further, a pin holder 12 having an inverted U-shaped cross section and a rectangular square hole 12a bored in the upper surface is fixed to the upper surface of the central part of the buckling part 4a, and a metal plate is bent into the inner groove of the pin holder 12. A shaft pin 13 molded by is rotatably inserted, and a connecting arm 13a molded integrally with the shaft pin 13 projects upward from the square hole 12a, and the protruding end of the connecting arm 13a The end of the connecting pin 9 is fixed to. In this third embodiment, since the wiper blade 6 can swing left and right with respect to the shaft pin 13 (in the direction of arrow Q in FIG. 8), the blade rubber 5 is reversed at both ends of the swing stroke of the arm 1. The rotation is performed smoothly, and unpleasant vibrations and reversal errors are prevented.

The fourth embodiment shown in FIGS. 10 and 11 is
A connecting arm 5e is integrally provided at the center of the upper surface of the head 5a of the blade rubber 5 via a thin wall portion 5d,
This connecting arm 5e is made to protrude upward from a hole 4d drilled in the center of the buckling part 4a of the rubber holder 4, and the reinforcing plate 1 is attached to this connecting arm 5e.
4 is fixed to the end of the connecting pin 9, and the wiper blade 6 is configured to swing in the direction of the arrow Q using the thin wall portion 5d as a fulcrum.

In the above-mentioned first to fourth embodiments, the size of the claw pieces 4b of the rubber holder 4 does not need to be the same in all numbers, and the claw pieces 4b in the center in the length direction
In other words, the pitch of the gap 4c at the center in the longitudinal direction can be set to be large and the pitch of the end portions may be set to be small, or vice versa. Moreover, the curvature of the rubber holder 4 is
It is not necessary to make the radius of curvature equal at each part in the length direction, and the radius of curvature can be set to be different between the center part and the end parts, for example, the center part can be set small and the end parts large, or vice versa. Further, the cross-sectional shape of the head 5a of the blade rubber 5 may be trapezoidal. Also,
The rubber holder 4 can be formed of an elastic metal plate, plastic plate, etc. other than a spring steel plate.

As explained above, in this invention, a blade rubber is attached to an arc-shaped rubber holder made of a thin spring steel plate, which also functions as a conventional blade lever, lever yoke, and backing, so that the wiper blade is configured. The number of parts involved is greatly reduced, the structure is simplified, assembly is easier, and manufacturing costs are significantly reduced.

[Brief explanation of the drawing]

FIG. 1 is a side view of the first embodiment of the present invention;
The figure is a cross-sectional view taken along the - line in Figure 1, and Figure 3 is a cross-sectional view taken along the line -1 in Figure 1.
FIG. 4 is a plan view of a portion of the wiper blade of the embodiment, FIG. 4 is a side view of a portion of the second embodiment, FIG. 5 is a sectional view taken along line V-V in FIG. plan view of
7 is a side view of the third embodiment, FIG. 8 is a sectional view taken along the line -- in FIG. 7, FIG. 9 is a plan view of a portion of the wiper blade of the third embodiment, and FIG. A side view of the main parts of the embodiment, Figure 11 is a diagram showing XI-XI in Figure 10.
FIG. 1: Arm, 2: Arm piece, 3, 8: Clip, 4: Rubber holder, 4a: Backing part,
4b: Claw piece, 5: Blade rubber, 5a: Head,
6: Wiper blade, 7, 9: Connection pin.

Claims (1)

[Scope of Claims] 1. A bucking part made of an elastic plate, in contact with the upper surface of the head of the blade rubber, and curved in an arc shape;
A rubber holder including a plurality of claw pieces that protrude from both side edges of the buckling portion toward the center of curvature of the arc and hold the side surface of the head of the blade rubber;
A blade lever is formed by attaching a blade rubber using the claw pieces, and the tip of an arm that can swing left and right is connected to the center of the blade lever by a connecting pin in the width direction. Automobile windshield wiper. 2. The windshield wiper for an automobile according to claim 1, wherein the blade lever is located below the arm. 3. The automobile windshield wiper according to claim 1, wherein the blade lever is located on the side of the arm. 4. The blade lever has a connecting arm that protrudes upward from the upper surface of the central portion and is swingable in the width direction;
The windshield wiper for an automobile according to claim 1, wherein a connecting pin is fixed to the upper end of the connecting arm.