Metal Cable Press Piece Resists Curling-Up Force
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Solution Overview
Problem
The existing FPC connector's resin-based FPC pressers lack mechanical strength, leading to potential deformation or breakage under curling-up forces, as they are cantilever-like structures with limited reinforcement, which can result in disconnection and damage when strong external forces are applied.
Innovation Solution
A cable connector design featuring a metal cable press piece with a plate-like shape, supported by both the fixed metal fitting and the insulator, which engages with the cable to resist deformation and breakage, ensuring secure connection even under strong curling-up forces by distributing the force across a larger area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If resin-based FPC pressers with cantilever structure are used, then the connector can be manufactured with simple structure and low cost, but the mechanical strength is insufficient leading to deformation or breakage under curling-up forces
Solution Approach 1:
The invention uses a composite structure combining resin insulator with metal fitting components. The metal cable press piece and metal engaging portion are integrated with the resin insulator to create a hybrid structure that leverages the strength of metal while maintaining the insulation and molding advantages of resin, thereby resolving the contradiction between manufacturing simplicity and mechanical strength.
Solution Approach 2:
The connector is divided into functional segments: the resin insulator body, the metal cable press piece for cable engagement, and the metal engaging portion for actuator connection. This segmentation allows each component to be optimized for its specific function - resin for insulation and molding, metal for strength - while maintaining overall manufacturing efficiency.
2Device complexity
If thin resin FPC pressers are used, then the connector structure remains simple and compact, but the pressers lack mechanical strength to resist strong external forces in curling-up direction
Solution Approach 1:
The metal cable press piece provides high mechanical strength to resist curling-up forces while the resin insulator maintains structural simplicity and compactness. This composite approach ensures reliability under external forces without significantly increasing device complexity.
Solution Approach 2:
The metal cable press piece is strategically positioned at the location requiring high strength (where the cable engages), while the rest of the insulator remains as simple resin. This local reinforcement provides the necessary reliability only where needed, maintaining overall structural simplicity.
3Device complexity
If the reinforcing metal fitting engaging portion is not pressed from above when actuator is closed, then the structure remains simple, but the engaging portion may move in curling-up direction and deform plastically or break
Solution Approach 1:
The metal engaging portion is designed with a geometry that prevents movement in the curling-up direction before any deformation can occur. The structure inherently resists the harmful action of curling-up forces through its shape and integration with the cable press piece, eliminating the need for additional pressing mechanisms.
Data Source
AI summary
A cable connector that can, when an external force in a curling-up direction acts on a cable inserted in an insulator in a state where an actuator is in a closed position, prevent the cable from disconnecting from the insulator in the curling-up direction without deformation or breakage of the connector. A cable connector includes: an insulator (20) into which a sheet-like cable (70) is removably insertable; a contact (30) supported by the insulator; a rotatable actuator (40); and a fixed metal fitting (55) fixed to the insulator. The fixed metal fitting includes a cable press piece (61) extending from a part of the fixed metal fitting and facing the cable. The cable press piece is plate-like. The insulator includes a facing portion (28a) facing a tip part of the cable press piece from a side opposite to the cable at least when the actuator is in the closed position.