Safety Switching Device Plug with Threaded Holding Part
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Solution Overview
Problem
Existing safety switching devices for motor vehicle windows face issues with durability and reliability of electrical connections, particularly in terms of maintaining a secure and permanent connection without the need for additional aids or tools, and are prone to detachment over time.
Innovation Solution
A safety switching device with a plug that has a holding part with a thread channel interacting with a screw opening, allowing for easy and secure clamping to the switching chamber, using a trapezoidal design for reliable attachment and a cap for protection against dirt and liquids, with pins made of non-corrosive materials for improved conductivity and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a plug is inserted into the switching chamber with clamp terminals to prevent movement, then the plug can be easily connected and disconnected, but the electrical connection shows signs of detachment over time and lacks durability
Solution Approach 1:
The connection system is divided into separate functional components: a plug with contact elements, a holding part with thread channels embedded in the switching chamber, and screw connections. This segmentation allows the plug to be easily inserted while the screw mechanism provides secure, durable fastening, resolving the contradiction between ease of connection and long-term reliability.
Solution Approach 2:
The holding part with thread channels is pre-embedded in the switching chamber before the plug is installed. This preliminary preparation enables the plug to be easily inserted into position, after which the screw connections can be securely fastened to ensure long-term durability without requiring complex assembly steps.
2Reliability
If a pressing ring is placed over the safety edge and plastically deformed to secure the contacting component, then the connection becomes permanent and secure, but the component cannot be loosened or removed without levering open the pressing ring
Solution Approach 1:
The screw connections with holding parts enable the plug to be securely fastened through self-threading into the pre-embedded holding parts. The design allows for easy loosening and removal by simply unscrewing, providing both secure connection and ease of repair without requiring leveraging or special tools.
3Ease of manufacture
If adhesive connection is used to attach the plug to the switching chamber, then the connection can be simple to apply, but the connection shows signs of detachment over time and is not permanently tight
Solution Approach 1:
The adhesive bonding mechanism is replaced with a mechanical screw connection system. The plug is fastened to the switching chamber using screws that thread into holding parts embedded in the chamber. This mechanical connection provides permanent, tight fastening that maintains reliability over time while remaining simple to assemble and disassemble.
4Reliability
If a tight-fitting housing of the plug compresses the switching chamber or buttons, then the plug connection becomes secure, but the switching chamber loses its original contour and may affect button operation
Solution Approach 1:
The connection system is segmented into the plug, holding parts embedded in the switching chamber, and screw fasteners. This segmentation allows the plug to be securely connected through the holding parts without requiring compression of the switching chamber housing, thereby maintaining the original contour and ensuring proper button operation while achieving secure connection.
Data Source
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AI summary
The invention relates to a safety switching device, in particular for power-operated systems, such as rolling doors, rolling gates, doors, vehicle hoists, work platforms, and the like, comprising at least one switch chamber (3) having two switch surfaces, which trigger a switch signal fed to an evaluating unit in the event of a contact due to deformation of the switch chamber (3), wherein the switch surfaces can be connected at an end of the switch range to a respective switch line. According to the invention, a safety switching device is provided that is improved relative to the prior art in particular in regard to the durability and function of the electrical connections. This is achieved in that a plug (21) can be connected to the switch chamber (3) and clamped to the switch chamber in order to establish an electrical connection.