Actuator Ring Grounding for Electrostatic Discharge in Winding Tubes
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Solution Overview
Problem
Existing electromechanical actuators for shading devices face issues with electrostatic charge buildup, leading to potential damage and malfunctions, as they often require additional accessories for discharge and can increase installation costs and complexity, while also compromising the protective coating of the casing.
Innovation Solution
An electromechanical actuator design that incorporates an electrical conduction element at the ring, connected to a torque support and the shielding or earth conductor of the power supply cable, creating a preferential discharge path to avoid damage and allow continuous electrostatic charge dissipation without the need for external accessories, thus maintaining the casing's protective coating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an electrical conduction element is added to discharge electrostatic charges, then electrostatic charge dissipation is improved, but device complexity increases due to additional accessories
Solution Approach 1:
The patent combines the electrical conduction element with the existing ring component of the electromechanical actuator. The ring, which already serves as a structural and guiding element, is modified to include the electrical conduction function through a conductive coating or integrated conductor, thereby eliminating the need for separate electrical conduction accessories and reducing overall device complexity while maintaining electrostatic charge dissipation capability
Solution Approach 2:
The ring component is transformed into a multi-functional element that simultaneously performs its original mechanical function (guiding and supporting the winding tube) and a new electrical function (discharging electrostatic charges). This universalization of the ring component reduces the total number of parts needed and simplifies the overall device structure
2Reliability
If an electrical conduction element is added to discharge electrostatic charges, then electrostatic charge dissipation is improved, but installation time increases due to additional assembly steps
Solution Approach 1:
By integrating the electrical conduction function into the existing ring component, the patent eliminates separate assembly steps for installing electrical conduction accessories. The ring with integrated conduction capability is installed as a single unit, significantly reducing installation time and complexity compared to assembling separate electrical conduction elements
3Reliability
If the casing is made conductive for charge discharge, then electrostatic charge dissipation is improved, but protective coating is compromised due to corrosion risk
Solution Approach 1:
Instead of making the entire casing conductive (which would expose the protective coating to corrosion), the patent applies conductive properties locally to the ring component. The ring receives a conductive coating or contains an integrated conductor only where needed for electrostatic charge dissipation, while the rest of the casing maintains its original protective coating and corrosion resistance
Solution Approach 2:
The ring acts as an intermediary component between the winding tube (source of electrostatic charges) and the external environment. By concentrating the electrical conduction function in this intermediate ring element rather than the casing, the patent achieves electrostatic discharge capability without compromising the casing's protective coating and corrosion resistance
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
This solution effectively prevents malfunctions and damage to electronic components by continuously dissipating electrostatic charges, simplifies installation, and maintains the protective coating of the casing, enhancing the reliability and cost-effectiveness of the electromechanical actuator.
Implementation Method 1
The electrical conduction element, configured to be in electrical contact with the winding tube
Data Source
AI summary
An electromechanical actuator includes a casing, a torque support, a ring, an electrical power supply cable and a device for discharging electrostatic charge. The ring is inserted partly around the torque support and forms a bearing guiding the rotation of a winding tube. The discharge device includes an electrical conduction element, which is configured to be in electrical contact with the tube, and an electrical linking element. The ring bears the electrical conduction element. The torque support at least partly accommodates the electrical linking element. The electrical conduction element is configured to be in electrical contact with the electrical linking element. The electrical linking element electrically connects the electrical conduction element to a shielding or to an earth electrical conductor of the cable.