Garden Tool Rod Insulating Sleeve for Electric Shock Prevention

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Solution Overview

Problem

Garden tools with two-section rod connections pose an electric shock risk due to the need for electrical connection between rods, especially if wire insulation fails, compromising user safety.

Innovation Solution

A garden tool design featuring a connecting rod assembly with strategically positioned terminals and insulating structures to ensure mechanical and electrical connection while maintaining a safe distance and effective insulation, preventing direct contact and reducing the risk of electric shock.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the first partial rod and the second partial rod are mechanically and electrically connected, then the power supply unit can supply power to the working head, but the user faces electric shock risk when operating to connect the two rods

Engineering Contradiction:

Improvepower transmission reliabilityVSAvoidelectric shock risk

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent introduces an insulating sleeve as an intermediary component between the first and second partial rods. This insulating sleeve serves as a mediator that allows mechanical connection and power transmission while preventing direct electrical contact between the user and the electrified components, thus resolving the electric shock risk while maintaining power supply reliability

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The connection structure is segmented into distinct functional zones: an insulating section with the insulating sleeve that isolates electrified components, and a connection section that enables mechanical and electrical coupling. This segmentation allows the system to simultaneously achieve safe user interaction and reliable power transmission

Inventive Principle:

Principle #1Segmentation

2Reliability

If the wire insulation fails, then the electrical connection is compromised, but the user faces electric shock risk due to the conductivity of the metal connecting rods

Engineering Contradiction:

Improveelectrical connection reliabilityVSAvoidelectric shock risk

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The insulating sleeve is installed beforehand on the second partial rod to provide a pre-established protective barrier. This prior cushioning measure ensures that even if wire insulation fails, the user is protected from electric shock by the additional layer of insulation provided by the insulating sleeve

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The insulating sleeve acts as a permanent intermediary between the user and the conductive metal rod, providing continuous protection against electric shock regardless of the wire insulation status. This mediator ensures that the harmful electrical energy cannot directly contact the user through the metal rod

Inventive Principle:

Principle #24Intermediary (Mediator)

3Power

If the first terminal and the second terminal are connected to transmit power, then the working head can operate, but direct contact with terminals poses electric shock risk

Engineering Contradiction:

Improvepower transmission capabilityVSAvoidelectric shock risk during operation

Core Design Contradiction:

PowerVSObject-affected harmful factors

Solution Approach 1:

The insulating sleeve serves as a mediator that allows power transmission through the connection structure while preventing direct contact between the user and the electrified terminals. The sleeve is designed to be transparent or translucent, allowing visual confirmation of connection while maintaining electrical isolation

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The insulating sleeve functions as a flexible protective shell that envelops the conductive components. This thin film-like structure provides effective electrical insulation while allowing the connection mechanism to operate flexibly and maintain power transmission capability

Inventive Principle:

Principle #30Flexible shells and thin films

Data Source

PatentUS11457561B2Garden tool

Publication Date: 2022.10.04 SKYBEST ELECTRIC APPLIANCE (SUZHOU) CO LTD

AI summary

A garden tool includes a connecting rod assembly, a working head, a power source, a first rod connected to the working head, a second rod connected to the power source, and a connection structure for mechanical and electrical connection between the first and second rods. A first terminal is arranged on the first rod and a second terminal arranged on the second rod, the first terminal being connected to a first wire, the second terminal being connected to a second wire, the first terminal and the second terminal connectable to transmit power of the power source to the working head through the first wire and the second wire. A second base is mounted in the second rod, the second base including at least two jacks independent of each other. At least two second terminals are respectively mounted in respective jacks.