Vehicle Antenna Cable Connection Structure with Integrated Clamp
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Solution Overview
Problem
The existing cable connection structures for vehicle antenna devices are hindered by the need for larger holes for metal clamps, leading to miniaturization issues, assembly difficulties due to dimensional deviations, and susceptibility to signal wire breakage under tension.
Innovation Solution
A cable connection structure featuring a coaxial cable with a connection terminal and cable clamp that holds the core wire and connection terminal at specific heights for electrical connection, using a positioning abutting part and cable clamp to secure the coaxial cable within a base plate, allowing for reduced size, easy assembly, and enhanced tensile strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal clamp is used to fix the signal cable, then the cable connection has required tensile strength, but the through hole must be larger than the signal cable diameter, hindering miniaturization
Solution Approach 1:
The cable clamp is integrated directly into the base plate structure, merging two separate components (clamp and base plate) into one. This eliminates the need for a separate through hole for the clamp, allowing the hole size to match the signal cable diameter exactly, thus achieving miniaturization while maintaining tensile strength through the unified structural design.
Solution Approach 2:
The base plate is designed to serve multiple functions: it provides structural support, contains the cable clamp integration, and forms the mounting surface for the antenna device. This multi-functionality reduces the need for additional components and larger holes, enabling compact device design while preserving mechanical strength for cable fixation.
2Strength
If both the metal clamp and base plate are made of metal, then structural strength is achieved, but dimensional deviations cause assembly difficulties
Solution Approach 1:
The base plate is constructed from a composite material combining metal and resin. The metal portion provides structural strength and rigidity where needed, while the resin portion offers dimensional stability and ease of molding, allowing precise integration of the cable clamp feature. This composite structure reduces sensitivity to dimensional deviations and simplifies assembly compared to all-metal construction.
3Ease of manufacture
If the metal clamp is fixed by pulling the signal cable downward, then the clamp secures to the base plate, but upward pushing force causes the clamp to move and may break the signal wire
Solution Approach 1:
The cable clamp is pre-integrated into the base plate structure during manufacturing, creating a permanent mechanical interlock. This preliminary action ensures that the clamp cannot move independently of the base plate, preventing the reliability issue where upward force on the cable could displace the clamp and break the signal wire. The assembly process is simplified as the clamp is already in position.
Solution Approach 2:
The metal-resin composite base plate provides enhanced mechanical interlocking for the cable clamp. The resin portion can be molded to create interference fits or mechanical keys that prevent clamp movement, while the metal portion maintains overall structural strength. This composite approach simultaneously improves connection reliability and assembly ease compared to all-metal designs.
Data Source
AI summary
To provide a cable connection structure used in a vehicle antenna device, capable of being reduced in size, easy to assemble, and having required tensile strength. The cable connection structure includes a connection terminal 10, a circuit board 20, a base plate 30, a positioning abutting part 40, and a cable clamp 50. The connection terminal 10 is attached to a braided wire 3 of a coaxial cable 1. The circuit board 20 has a signal line connection hole 21 and a ground line connection hole 22. The base plate 30 has a cable insertion hole 31. The positioning abutting part 40 is used for determining the position of the circuit board 20 on the base plate 30. The cable clamp 50 grasps a protective outer cover 4 of the coaxial cable 1, holds a core wire 2 such that the core wire 2 is exposed at a predetermined height position, and holds a connection terminal 10 such that the connection terminal 10 is exposed at a predetermined height position.