JP2002274333A - Wiper mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiper mechanism with a simple structure leaving almost no un-wiped portion of a glass surface and easily adaptable to the glass shape. SOLUTION: A retainer 7 is attached to the tip of a wiper arm 4, and a wiper blade 6 is swingably attached via a pin 7a provided on the retainer 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an improvement of a wiper mechanism for wiping a glass surface of a vehicle.

[0002]

2. Description of the Related Art Wiper devices that are used to wipe off water droplets and the like to secure a clear view when water drops adhere to a windshield or a rear glass of a vehicle during rainfall and have poor visibility are widely known. .

[0003]

However, since a wiper plate made of rubber is wiped in a fan shape on the surface of a curved glass or a flat glass formed in a rectangular shape with a wiper arm, a corner of a rectangular window is formed. It is also well known that wiping leaves are left behind.

In order to prevent the unwiped portion from hindering the field of view, various devices have been proposed, for example, Japanese Patent Application Laid-Open No. 9-8634.
No. 7, JP-A-7-117631, etc., the wiping performance of the wiper is greatly affected by the shape of the glass and the shape of the vehicle body, and particularly in the case of a truck, the axis of the wiper arm may be visible from outside the vehicle. However, there is a problem that the shape of the vehicle body is restricted by the performance requirements of the wiper, and the degree of freedom in design is limited.

As a countermeasure, a method in which the angle of the wiper blade with respect to the wiper arm is changed during operation using, for example, a parallel link is employed in a large vehicle such as a bus, but the structure is complicated and the number of parts is large. And the weight is large, and the cost is high.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a wiper mechanism which is simple in structure, light in weight, can be adapted to a glass shape and can have a large wiper wiping area, and does not affect the cab design.

[0007]

According to the present invention, there is provided a wiper arm (4) which is swingably attached to a vehicle body by a vehicle body-side rotation shaft (3). A retainer (7) is attached to the end of the arm piece (7). A pin (7a) provided on the retainer (7) supports an arm piece (8) so as to be rotatable by a predetermined angle. A wiper plate (6) for wiping the glass surface is detachably attached to the wiper arm (8), and the position of the pin (7a) in the longitudinal direction of the wiper plate (6) is set from the center of the wiper plate (6) to the wiper arm (6). It is configured to be offset outward with respect to the rotation axis of 4).

[0008]

FIG. 1 shows a front view of a truck,
The cab 1 is provided with a plurality of (two in the illustrated example) wipers 5 for wiping the windshield 2 in rainy weather or the like, and the wiper 5 includes a wiper arm 4 attached to the shaft 3 and a wiper 5. And a blade 6.

Here, reference numeral 20 denotes an outside mirror,
21 is a front panel, 22 is a radiator grill, 23
Indicates a front axle, 24 indicates a tire, and 25 indicates a headlight.

FIG. 2 is a front view showing the details of the wiper according to the present invention. A retainer 7 constituting the wiper arm 4 of the wiper 5 is formed in a U-shaped cross section.

Referring to FIG. 3, a pin 7a is fixed to the retainer 7, and an arm piece 8 having a U-shaped tip is rotatably attached to the pin 7a. ing. The arm piece 8 is regulated by the flange portion 7b of the retainer 7 so that the wiper blade 6 attached to the tip end portion with respect to the wiper arm 4 has a predetermined swing angle β about a predetermined angle α. It is configured as follows.

A conventionally known wiper blade 6 is detachably attached to the tip of the arm piece 8 by a conventionally known attachment method. The position of the pin 7a provided on the retainer 7 in the longitudinal direction of the wiper plate is set as follows. The wiper blade 6 is configured to be offset outward from the center of the wiper blade 6 with respect to the rotation axis 3 of the wiper arm 4 (see FIG. 1). That is, the configuration is such that the dimension A in the drawing is larger than the dimension B.

Hereinafter, the operation will be described with reference to FIGS. In FIG. 4, the wiper blade 6 of the wiper 5 for wiping the surface of the windshield 2 is configured such that when the wiper arm 4 swings clockwise as viewed from the front of the glass, the wiper blade 6 has the pin 7a of the retainer 7 connected thereto. Are offset from the center of the wiper blade 6 so that A> B.
a clockwise moment about the center a, the arm piece 8 rotates by β and the lower end position L of the windshield 2
In this case, the wiper blade 6 is parallel to the lower end of the glass 2, and there is no remaining wiping 2 c when α1 is fixed in the conventional technique shown in FIG. 5.

When the wiper arm 4 swings counterclockwise as viewed from the front of the glass, the wiper blade 6 is configured such that the pin 7a of the retainer 7 is offset from the center of the blade 6 so that A> B. For the blade 6
Generates a counterclockwise moment about pin 7a,
At the position P on the pillar side of the windshield 2 by rotating the arm piece 8 by β, the blade 6 is parallel to the pillar, and the remaining wipe 2b when α1 is fixed in the prior art shown in FIG. 5 remains. Absent.

Therefore, the wiping area 12 of the wiper 5 is greatly improved as compared with the wiping area 2a of the prior art, and the pin 7a of the retainer, which is the center of rotation of the wiper plate 6, is used.
By adjusting the position and the swing angle β of the wiper plate 6, the wiping range can be adapted to the glass shape, so that the degree of freedom in the design of the vehicle body is not limited.

[0016]

Since the present invention is configured as described above, the following excellent effects can be obtained. (1) Since the wiper plate can be swung within a certain angle with respect to the wiper arm, unwiped residue can be reduced. (2) Therefore, the wiping range of the wiper can be set appropriately without affecting the design of the vehicle body.

[Brief description of the drawings]

FIG. 1 is a front view of a truck showing one embodiment of the present invention.

FIG. 2 is an enlarged front view showing details of a wiper shown in FIG. 1;

FIG. 3 is a perspective view showing a main part of FIG. 2;

FIG. 4 is a view for explaining the operation of the wiper of FIG. 1;

FIG. 5 is a diagram showing an example of a residual wipe according to a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Cab 2 ... Windshield 4 ... Wiper arm 5 ... Wiper 6 ... Wiper blade 7 ... Retainer 8 ... Arm piece

Claims (1)

[Claims] 1. A wiper arm which is attached to a vehicle body so as to be swingable by a vehicle body-side rotation shaft, a retainer is attached to a tip end of the wiper arm, and a pin provided on the retainer has an arm. A piece is rotatably supported by a predetermined angle, and a wiper plate for wiping the glass surface is detachably attached to the arm piece, and the position of the pin in the longitudinal direction of the wiper plate is set from the center of the wiper plate. A wiper mechanism configured to be offset outward with respect to a rotation axis of the wiper arm.