JPS6141770B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a wiper device for a road vehicle that wipes off water, dust, etc. adhering to a windshield in front of a vehicle body.

The windshield of a road vehicle, for example a scooter-type motorcycle as shown in FIG. 1, is a three-dimensional curved surface whose cross-sectional shape changes at each position, as shown in FIGS. 2 to 4. Therefore, when wiping the surface of the windshield a with the wiper device, the wiper blade b is always in close contact with the surface of the windshield a in response to changes in the surface shape of the windshield a. When no force is applied to b, the blade b is elastically supported in at least three locations, i.e., both ends and an appropriate location in the middle, with a significantly curved shape, and is elastically biased toward the windshield a. The wiper arm c presses the blade b against the surface of the windshield a.

Therefore, when wiping the wiper blade, the surface pressure of the blade b on the windshield a is not uniform, and the surface pressure near the center of the blade b is smaller than the surface pressure near both ends. In some cases, sufficient wiping was not performed in the wiping range near the area. Also, since the surface pressure of blade b on windshield a is uneven, this surface pressure is set based on the point where the surface pressure is the smallest, and as a result, this surface pressure becomes excessive at other locations. Windshield a was sometimes scratched, and wiper blade b sometimes stuck to windshield a.

The present invention relates to an improvement of a wiper device for road vehicles that eliminates such drawbacks, and its purpose is to make the surface pressure between the windshield and the wiper blade uniform and to reduce the surface pressure as a whole. The object of the present invention is to provide a wiper device for road vehicles that can perform the following functions.

The embodiment shown in FIGS. 5 to 7 will be described below. Reference numeral 1 is integrally attached to a handlebar pivotably supported on the front body of a scooter-type motorcycle as shown in FIG. 1. The front surface of the windshield 1 is formed as a part of a spherical surface having a constant radius of curvature ro, as shown in FIGS. 6 and 7.

In addition, the wiper shaft 2 is manually or electrically rotated back and forth over a predetermined angle range of 90°.
is protruded forward through the hole 1a of the windshield 1 along the normal line of the curved surface of the windshield 1, and the base end of the wiper arm 3 can swing back and forth at the tip of the wiper shaft 2. The tip of the wiper arm 3 is urged to approach the front surface of the windshield 1 by the force of a spring (not shown).

Further, a lever 4 is attached to the tip of the wiper arm 3, and a wiper blade 5 curved to the same curvature as the curved surface of the windshield 1 is attached to the lever 4.

Since the embodiment shown in FIGS. 5 and 6 is configured as described above, when the wiper shaft 2 is reciprocally rotated manually or electrically over a range of 90 degrees, the wiper blade 5 is moved from the windshield 1 to the windshield 1. The windshield 1 is oscillated back and forth while remaining in close contact with the front surface of the windshield 1, and raindrops and dust adhering to the front surface of the windshield 1 are wiped off.

In this case, the line of contact between the windshield 1 and the wiper blade 5 is always an arc with a constant radius, so the wiper blade 5 can maintain a constant shape at any position. In other words, the surface of the windshield 1 is a rotating surface that has a circular arc curve as shown in FIG. Since the wiper blade 5 rotates around the wiper shaft 2, the contact line of the wiper blade 5 with the windshield 1 traces the above rotation plane and the rotation plane due to this rotation.
Therefore, a constant surface pressure is always applied to the front surface of the windshield 1 over the entire length of the wiper blade 5, so that there is no uneven wiping.

In addition, since the wiper shaft 2 is oriented toward the center of curvature of the front surface of the windshield 1, the angle between the wiper shaft 2 and the wiper arm 3 remains constant no matter where the wiper blade 5 is located on the windshield 1. held in the window
The pressing force of the wiper blade 5 against the front surface of the shield 1 is always maintained constant.

In this way, the surface pressure of the wiper blade 5 acting on the front surface of the windshield 1 is uniform both in the longitudinal direction of the blade 5 and in positions perpendicular to this, so the surface pressure can be minimized to the necessary minimum. As a result, the wiper blade 5 can be prevented from becoming sagging.

In addition, since the surface pressure between the windshield 1 and the wiper blade 5 can be reduced, the power required to drive the wiper can be reduced, making it possible to downsize the motor or making manual wiping operations easier. Moreover, damage to the windshield 1 caused by the wiper blade 5 can be prevented.

Furthermore, since the windshield 1 is formed into a spherical shape, there is no need for reinforcing ribs or bends, and a simple shape provides distortion-free visibility and sufficient strength, and it also reduces air resistance during driving. reduction is possible.

In the embodiments shown in FIGS. 5 to 7, the windshield 1 is formed as a spherical surface with a constant radius of curvature, but as shown in FIGS. A windshield 6 is formed in the surface shape of a rotating body having a curve as a generating line as shown in FIG. The curved shape may be formed to match the curved generatrix of the windshield 6; in such embodiments, the curved shape of the windshield 6 may be formed to match the curved generatrix of the windshield 6; The surface pressure of the wiper blade 10 acting on the front surface can be made uniform both in the longitudinal direction of the wiper blade 10 and in positions perpendicular thereto.

Further, in the embodiments described above, the present invention is applied to a scooter type motorcycle, but the present invention is of course applicable to other types of road vehicles.

The present invention provides a wiper device equipped with a blade whose vertical section is formed in a predetermined curve for wiping the surface of the windshield as described above, and a tiltable arm that supports the blade. At least in the wiping range of the wiper, the cross-sectional shape parallel to the wiper is formed to match the curve of the blade.
The surface pressure of the wiper blade acting on the front surface of the shield can be made uniform, the surface pressure can be reduced as a whole, and the required wiping performance can be provided.

Therefore, in the present invention, it is possible to prevent the windshield from being damaged and the wiper blade from sticking or becoming stale.

Additionally, since the wiper driving force can be reduced accordingly, the motor can be made smaller and lighter, or the manual operability can be improved.

Although the present invention has been described above in detail with respect to the embodiments shown in the drawings and the embodiments not shown in the drawings, the present invention is not limited to such embodiments, and can be implemented within the scope of the spirit of the invention. The design can be freely modified as necessary.

[Brief explanation of the drawing]

Figure 1 is a side view of a scooter-type motorcycle equipped with a conventional wiper device, Figure 2 is a front view of the same wiper device, and Figures 3 and 4 are the same as in Figure 2.
5 is a front view illustrating an embodiment of the wiper device for a road vehicle according to the present invention, and FIGS. 6 and 7 are cross-sectional views taken along the line and - line in FIG. , - A sectional view taken along the line, FIG. 8 is a front view of another embodiment, and FIG. 9 is a front view of another embodiment.
Figures and Figure 10 are -lines and X- of Figure 8.
FIG. 3 is a cross-sectional view taken along an X-ray. 1...Wind shield, 2...Wiper shaft, 3...Wiper arm, 4...Lever, 5...Wiper blade, 6...Wind shield, 7...Wiper shaft, 8...Wiper arm, 9...Lever, 10...Wiper blade, 11...Wind
shield.

Claims (1)

[Claims] 1. A blade that wipes the surface of the windshield in front of the vehicle body and has a longitudinal section formed in the required curve,
In a wiper device including an arm that supports the blade at one end and is swingable around the other end,
The windshield surface in at least the range of wiping by the blade of the windshield is a rotating surface formed by rotating the required curve around one axis of rotation using the required curve as a generatrix, and the arm is formed around the axis of rotation. and supports the blade on the arm so that the blade rotates about the axis of rotation while being pressed against the windshield surface in response to the swing of the arm. A wiper device for road vehicles that is characterized by: