Piercing Connector with Blind Insert Slot and Needle Clamping
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Solution Overview
Problem
Existing piercing connectors for electric wires with stranded cores and insulation sheaths often fail to provide reliable electrical contact due to improper wire positioning, especially in complex situations where the wire is hidden or inaccessible.
Innovation Solution
A piercing connector with a blind insert slot and a tightening mechanism featuring a metal needle and clamping mechanism, allowing for proper wire positioning and penetration by engaging a clamping claw and protrusion system that ensures reliable electrical contact when a threshold force is applied, even in complex configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wire is positioned and penetrated in one operation using a known piercing connector, then the device structure is simple, but the electrical contact reliability deteriorates when the wire is not properly positioned
Solution Approach 1:
The piercing connector is divided into distinct functional sections: a positioning section with an insert slot that guides and secures the wire, and a penetration section with a needle that pierces the insulation. This segmentation allows the wire to be properly positioned before penetration occurs, ensuring reliable electrical contact while maintaining reasonable structural complexity through modular design.
2Adaptability or versatility
If a blind insert slot is used for wire insertion, then the connector can be hooked behind hidden wires in complex situations, but the device complexity increases due to additional positioning mechanisms
Solution Approach 1:
The blind insert slot is designed to perform preliminary positioning of the wire before the penetration action occurs. The slot's geometry pre-positions the wire in the correct location, and the protrusion-claw mechanism maintains this positioning during the subsequent needle penetration. This preliminary action enables the connector to adapt to hidden or inaccessible wires while keeping the positioning mechanism relatively simple through geometric design rather than complex active components.
Data Source
Figure 1A
Figure 1B
Figure 2A
AI summary
The invention relates to a piercing connector configured for making an insulation-piercing contact with an electric wire having stranded core and an insulation sheath, wherein the piercing connector comprises a head and at one side thereof a blind insert slot for inserting the electric wire from aside, a shaft with an inner channel in which a wire clamp is enclosed, and a tightening knob around the outer thread with a metal needle that extends through the shaft towards the insert slot, wherein the wire clamp comprises a clamping body with a clamping claw that is slidable through the inner channel between a retracted position and a clamping position, and a protrusion that displaceable with respect to the clamping body wherein the protrusion retracts with respect to the clamping body after a threshold force exerted by the tightening knob on the protrusion is exceeded.