Wiper Mechanism Using Magnetic Force Transmission
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Solution Overview
Problem
Existing wiper systems for vehicles have complex link structures that increase manufacturing costs and require additional control circuits for converting rotational motion into reciprocating angular motion, making them expensive and complex.
Innovation Solution
A device comprising a fixed body, a rotating body, and a torsion spring that converts rotational motion into reciprocating angular motion, where the rotating body is driven by a DC motor and uses a magnetic force transmission system, allowing for a simple and cost-effective wiper system configuration with reduced manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a link structure is used to convert rotational motion into reciprocating angular motion, then the wiper arm can perform reciprocating motion, but the device complexity and manufacturing cost increase due to many mechanical elements
Solution Approach 1:
The patent replaces the traditional mechanical link structure with a magnetic field-based drive system. A permanent magnet is mounted on the rotating body, and its magnetic field interacts with a magnet wheel on the output shaft to directly generate reciprocating angular motion, eliminating complex mechanical linkages, pins, and joints while achieving the same functional result
Solution Approach 2:
The patent introduces a magnet wheel as an intermediary component between the rotating body and the output shaft. The magnet wheel translates the rotational motion into reciprocating angular motion through magnetic interaction, serving as a simple mediator that replaces complex mechanical transmission mechanisms
2Device complexity
If the link structure is removed and the rotation shaft directly performs reciprocating angular motion, then the device complexity reduces, but a control circuit must be added to the motor, increasing manufacturing cost
Solution Approach 1:
The permanent magnet mounted on the rotating body automatically generates the magnetic field needed to drive the magnet wheel through its rotational motion alone. The system is self-regulating and requires no external control circuitry, as the magnetic interaction inherently produces the reciprocating motion pattern without electronic control
Solution Approach 2:
The patent replaces the need for electronic control circuits with a passive magnetic field interaction system. The permanent magnet's magnetic field substitutes for active electronic control, achieving reciprocating motion through physical magnetic forces rather than electronic signaling
3Reliability
If traditional wiper systems are used, then effective dirt removal is achieved, but the manufacturing cost increases due to complex structures and additional control circuits
Solution Approach 1:
The patent extracts and removes the unnecessary complex mechanical link structure and electronic control circuit from the traditional wiper system. By taking out these redundant components and retaining only the essential elements (motor, rotating body with permanent magnet, magnet wheel, and wiper blade), the system achieves the same cleaning function at lower manufacturing cost
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 solution enables a cost-effective and simplified wiper system with reduced manufacturing costs and minimal risk of moisture infiltration or corrosion, while maintaining effective dirt removal from vehicle glass surfaces.
Implementation Method 1
the torsion spring may apply an elastic restoring force such that one of the pair of rotating wings is in contact with one of the pair of stoppers when an external force is not applied to the rotating body
Implementation Method 2
uses a magnetic force transmission system
Data Source
AI summary
A device for converting a rotational motion into a reciprocating angular motion and a wiper system including the same include a fixed body fixed to a certain object; a rotating body rotatably connected to the fixed body and rotating around a fixed axis; and a torsion spring coupled to the fixed axis and having an end portion and an opposite end portion, the end portion being held by the fixed body and the opposite end portion being held by the rotating body.