Cable Connection Socket Screwless Grounding and Strain Relief
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Solution Overview
Problem
Existing cable junction boxes are difficult to assemble due to complex screw-based grounding and strain relief mechanisms, which require separate screwing processes and can be cumbersome to access once cables are installed.
Innovation Solution
A cable junction box design featuring a direct grounding contact that eliminates the need for screws, integrated with the stamped parts and a rotatably mounted strain relief clip with latching elements, allowing for easy assembly and secure cable locking without additional screws.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If screw-based grounding and strain relief mechanisms are used, then reliable electrical connection and cable securing are achieved, but assembly complexity and number of components increase
Solution Approach 1:
The patent combines the grounding contact and strain relief bracket into a single integrated component. The grounding contact serves dual functions: providing electrical grounding and acting as the strain relief bracket that secures the cable. This merging eliminates the need for separate screw-based mechanisms, reducing assembly complexity while maintaining reliable electrical connection and cable securing.
Solution Approach 2:
The grounding contact is designed to perform multiple functions simultaneously: it provides electrical grounding, acts as a strain relief bracket, and serves as the mounting structure for contact elements. This multi-functionality eliminates the need for separate dedicated components for each function, thereby reducing the overall number of parts and simplifying assembly while ensuring reliable performance.
2Reliability
If separate screwing processes are used for grounding and strain relief, then secure cable locking and grounding are achieved, but assembly time and manufacturing steps increase
Solution Approach 1:
The patent merges the grounding function and strain relief function into a single integrated grounding contact component. This eliminates the need for separate screwing processes for grounding and strain relief, as both functions are achieved simultaneously through the integrated design. The cable is secured and grounded in a single assembly operation, significantly improving assembly speed while maintaining secure cable locking.
Solution Approach 2:
The grounding contact is pre-designed with integrated strain relief brackets and contact element mountings during the manufacturing process. This preliminary integration means that during assembly, no additional separate operations are needed to install grounding or strain relief components - they are already prepared as a unified structure, thereby reducing assembly time and increasing productivity.
3Reliability
If multiple separate components are used for grounding and strain relief, then functional reliability is improved, but the number of components and assembly steps increases
Solution Approach 1:
The patent merges multiple separate components (grounding contact, strain relief bracket, and contact element mountings) into a single integrated grounding contact structure. This integration maintains the functional reliability of grounding and cable securing while significantly reducing the number of discrete components that need to be manufactured, managed, and assembled.
Solution Approach 2:
The integrated grounding contact serves multiple functions that would traditionally require separate components: electrical grounding, cable strain relief, and mounting for contact elements. This multi-functionality reduces the quantity of components needed while ensuring that each function is performed reliably through the unified design.
Data Source
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AI summary
Cable connecting box comprises a mains lead cleat arranged in a cable duct and having a rotating hoop (20) on which are arranged locking elements for locking the hoop in a housing lower part (2). Preferred Features: A recess in a holding element of the housing lower part is formed in such a way that the recess runs through the holding element from the cable duct.