Shield Terminal Segmentation for Assembly Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing shield terminals face issues with reduced shielding function due to clearance between holding portions and difficulty in assembling the dielectric, which affects workability and reliability.
Innovation Solution
A shield terminal design featuring a tubular member to surround the dielectric, a separate connecting member with a crimping portion and hook for secure attachment, and a guide means to facilitate assembly, ensuring efficient mounting and enhanced shielding functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the holding portion is formed into a tubular shape continuous over the entire periphery to eliminate clearance and improve shielding function, then the shielding reliability is improved, but the dielectric may interfere with the crimping portion making assembly difficult
Solution Approach 1:
The outer conductor is divided into two separate components: a tubular member that provides the holding portion for the dielectric, and a separate connecting member that includes the crimping portion. This segmentation allows the tubular member to be formed as a continuous tubular shape for reliable shielding while the separate connecting member can be assembled without interference from the dielectric, thus resolving the technical contradiction between shielding reliability and assembly workability
2Strength
If the crimping portion is crimped to the shield layer, then secure electrical connection is achieved, but the front part of the connecting member may be lifted and displaced radially outward by reaction force
Solution Approach 1:
A hook is formed on the front end part of the connecting member and locked to the rear end of the tubular member before crimping. This preliminary action creates a restraining force that counteracts the radial outward displacement caused by crimping reaction force, preventing the front part of the connecting member from being lifted and maintaining assembly position precision while still achieving secure crimping connection
Data Source
AI summary
It is aimed to improve assembling workability and the reliability of a shielding function. A shield terminal includes inner conductors (52) to be connected to front end parts of cores (62) of a shielded cable (60), a dielectric (46) configured to accommodate the inner conductors (52), a tubular member (12) constituting an outer conductor (10) and configured to surround and hold the dielectric (46), a lower member (18) separate from the tubular member (12), constituting the outer conductor (10) and including a crimping portion (32) connectable to a shield layer (65) of the shielded cable (60), a first hooking portion (22) formed on a front end part of the lower member (18) and lockable to a rear end edge part of the tubular member (12), and a first guide means (28) configured to guide the lower member (18) to a proper assembly position while allowing the lower member (18) to swing with the first hooking portion (22) as a fulcrum.