Cable Connection Structure Radial Compression for Endoscope Reliability
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Solution Overview
Problem
Existing cable connection structures for medical and industrial endoscopes face challenges in securely maintaining the connection between coaxial cables and circuit boards, particularly under tensile loads, which can lead to signal transmission disruptions and connection failures.
Innovation Solution
A cable connection structure that includes a coaxial cable with a core wire, an external covering layer, and a compressing member, such as a swaging member, which radially compresses the cable to suppress movement of the core wire relative to other layers, thereby preventing tensile load transmission and ensuring secure electrical connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cable assembly with multiple coaxial cables is collectively connected to a circuit board using alignment blocks and grounding, then electrical connection is achieved, but the connection becomes vulnerable to tensile loads causing signal transmission disruptions
Solution Approach 1:
The invention divides the cable assembly into individually connected coaxial cables, each with its own core wire connected to separate electrodes on the board, rather than collectively connecting all cables together. This segmentation allows each connection to be independently optimized and reduces the impact of tensile loads on the overall connection reliability.
Solution Approach 2:
The invention applies different structural characteristics to different parts of the cable assembly. Each core wire is individually positioned and connected to its corresponding electrode, allowing for optimized local connection geometry. The alignment blocks are designed with specific geometries to maintain precise positioning of each cable's core wire at its connection point, enhancing local connection strength against tensile loads.
2Manufacturing precision
If the distal end faces of electrical wires and alignment block are ground to match, then alignment precision is improved, but the manufacturing process becomes more complex
Solution Approach 1:
The alignment blocks are designed with pre-formed distal end faces that have the required alignment geometry built into their structure. This preliminary preparation of the alignment block surfaces eliminates or reduces the need for subsequent grinding operations on the electrical wires, maintaining high alignment precision while simplifying the manufacturing process.
Solution Approach 2:
The invention replaces the mechanical grinding process with a design-based alignment approach. Instead of relying on post-manufacturing grinding to achieve alignment, the alignment blocks are designed with inherent geometric features that provide precise alignment during assembly, substituting a complex mechanical processing step with a simpler design and assembly process.
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 compressing member effectively maintains the connection between the core wire and electrodes on the board, even under deformation, preventing signal disruptions and ensuring reliable transmission of electrical signals in endoscope applications.
Implementation Method 1
a compressing member attached to an outer periphery of the cable and radially compressing a part in a longitudinal direction of the cable
Data Source
AI summary
A cable connection structure includes: a cable including a core wire and an external covering layer covering the core wire; a board on which an electrode is formed, the core wire being electrically connected to the electrode at an end face of the cable; and a compressing member attached to an outer periphery of the cable and radially compressing a part in a longitudinal direction of the cable.