Coaxial Cable Connector Grounding Spring Design
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Solution Overview
Problem
Conventional coaxial cable connectors, such as the F-type connector, suffer from poor grounding due to gaps between the inner sleeve and the threaded interface connector, leading to deteriorated electrical signal transmission performance.
Innovation Solution
A coaxial cable connector design featuring a conductive grounding spring with resilient tongue sections mounted between the nut and inner sleeve, ensuring secure mechanical and electrical connection by compressing and expanding to fill the gap between the nut and inner sleeve, thereby enhancing contact and grounding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional nut and inner sleeve structure is used, then the connector structure is simple, but gaps remain between the inner sleeve and threaded interface connector leading to poor grounding
Solution Approach 1:
A conductive grounding spring is introduced as an intermediary component between the inner sleeve and the nut. This spring makes contact with both the inner sleeve and the nut, providing a reliable electrical connection path that ensures good grounding without requiring direct metal-to-metal contact between the inner sleeve and the threaded interface connector.
Solution Approach 2:
The grounding spring changes its physical state from a relaxed configuration to a compressed configuration during the tightening process. This parameter change allows the spring to transition from a non-contacting state to a contacting state, ensuring electrical connection is established as the nut is screwed onto the threaded interface connector.
2Reliability
If the nut is fully connected with the threaded interface connector, then grounding is improved, but the resilient tongue sections must be compressed which complicates the connection process
Solution Approach 1:
The grounding spring is designed with resilient tongue sections that dynamically change their position and contact pressure as the nut is tightened. The spring automatically adjusts its compression level based on the tightening force applied, ensuring reliable electrical contact without requiring precise control or complex adjustment mechanisms.
Solution Approach 2:
The resilient tongue sections of the grounding spring automatically make contact with the threaded interface connector as the nut is tightened, and automatically maintain appropriate contact pressure through their elastic recovery. This self-adjusting mechanism eliminates the need for additional adjustment steps or complex control systems to ensure proper electrical connection.
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 design ensures reliable electrical connection and improved signal transmission quality by maintaining secure contact between the nut and inner sleeve, preventing gaps and ensuring optimal grounding.
Implementation Method 1
The conductive grounding spring has an inner annular section fitted around the first interface section of the inner sleeve in secure contact therewith, and multiple plate-like resilient tongue sections extending from an end of the inner annular section and outward bent and expanded for mechanically and electrically connecting with the inner flange of the nut.
Data Source
Figure 1
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AI summary
A coaxial cable connector 20 includes: coaxial and radially spaced inner sleeve 21 and outer sleeve 26, a front end of the inner sleeve 21 having an outer flange 22 and first and second interface sections 23,24, a rear end of the inner sleeve 21 having a rearward extending section 25; a nut 29 having an inner flange 291 at rear end; and a conductive grounding spring 30 mounted between the first interface section 23 of the inner sleeve 21 and the inner flange 291 of the nut 29. The conductive grounding spring 30 has an inner annular section 31 fitted around the first interface section 23 of the inner sleeve 21 in secure contact therewith, and multiple plate-like resilient tongue sections 33 extending from an end of the inner annular section 31 and outward bent for mechanically and electrically connecting with the inner flange 291 of the nut 29. The coaxial cable connector 20 can be reliably electrically connected with a threaded interface connector 41 of an electronic device 40 via the nut 29.