Telescopic Windshield Wiper Assembly for Curved Glass Coverage
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Solution Overview
Problem
Conventional wiper systems for vehicles, particularly those with larger windshields, often fail to adequately clean the upper areas and corners of the windshield, and struggle with maintaining a consistent wiping angle on curved surfaces.
Innovation Solution
A wiper system with a support assembly that includes a motorized wiper arm and blade, capable of sliding, rotating, and pivoting movements, controlled by a control unit, to adjust pressure and coverage area, using motors and sensors for optimal wiping on curved surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If two pendulum wipers are used, then the wiper system can cover a larger windshield area, but the upper areas and corners of the windshield remain unwiped
Solution Approach 1:
The wiper blade is made dynamically adjustable through a telescopic arm mechanism that allows the blade length to vary during operation. The arm can extend and retract to adjust the blade's reach and angle, enabling comprehensive coverage of the windshield surface including upper areas and corners that fixed pendulum wipers cannot reach.
2Area of stationary object
If three pendulum wipers are used to cover larger windshields, then more area is covered, but un-wiped areas at the upper end and corner areas still remain
Solution Approach 1:
A single wiper system performs multiple functions by combining the telescopic arm mechanism with an adjustable blade angle. The arm can extend to reach upper areas, angle to cover corner regions, and maintain consistent contact pressure throughout the wiping motion, replacing the need for multiple separate pendulum wipers with one multi-functional device.
3Device complexity
If conventional wiper systems are used on highly curved windscreens, then the system structure remains simple, but the attack angle of the wiper blade cannot be maintained normal to the windscreen
Solution Approach 1:
The wiper blade is mounted on a telescopic arm that can dynamically adjust its angle and position during the wiping motion. This dynamic adjustment allows the blade to maintain a substantially constant attack angle normal to the windscreen surface throughout the complete wiping motion, even on highly curved windscreens, by compensating for surface variations in real-time.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system ensures comprehensive windshield cleaning by adjusting pressure and coverage, eliminating the need for multiple wipers and effectively wiping curved surfaces.
Implementation Method 1
the first motor is arranged for interacting with a first coupling element to rotate the wiper arm around a rotation axis
Implementation Method 2
a second motor adapted to pivot the tilting table around a pivot axis
Implementation Method 3
the wiper blade is inclined relative to the vertical, the wiper blade thus applying a pressure on the vehicle windshield
Data Source
Figure 1~2
Figure 3A~4B
Figure 5~6
AI summary
The invention relates to a wiper system (100) for a vehicle windshield (10), the wiper system (100) comprising: - a support assembly (120) that is slidably movable along a guide rail (101), - a wiper (110) rotatably mounted on the support assembly (120), the wiper (110) comprising a wiper arm (112) and a wiper blade (114) connected thereto, wherein the support assembly (120) comprises : • a first motor mounted on a motor base, the motor base being slidably movable relative to a tilting table between at least two different positions, i.e. a first position in which the first motor is arranged for interacting with a first coupling element to rotate the wiper arm around a rotation axis, and a second position in which the first motor is arranged for interacting with a second coupling element to adjust a length of the wiper, • a second motor adapted to pivot the tilting table around a pivot axis, the tilting table being movable between at least two different positions, i.e. a non-operating position in which the wiper arm is substantially vertical, the pressure applied by the wiper blade (114) on the vehicle windshield (10) thus being null, and a tilted position in which the wiper blade (114) is inclined relative to the vertical, the wiper blade (114) thus applying a pressure on the vehicle windshield (10).