Electrostatic Coating Gun Removable Electrode Wire and Trigger Guard

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Solution Overview

Problem

Existing electrostatic coating guns lack a convenient and efficient method for attaching and detaching an electrode wire, which is essential for conducting electrostatic charges to coatings, and they do not have a mechanism to prevent accidental trigger actuation.

Innovation Solution

The electrostatic coating gun incorporates a removably attached electrode wire held by a retaining ring and screws, allowing easy attachment and detachment, and features a trigger guard with a hinge and notches that prevent trigger actuation when not intended.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the electrode wire is permanently fixed in the coating gun, then the electrostatic charge conduction is stable, but the electrode wire cannot be easily replaced or adjusted

Engineering Contradiction:

Improveease of electrode wire attachment and detachmentVSAvoidstability of electrostatic charge conduction

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The electrode wire is segmented from the main gun body through a removable air cap assembly. The air cap can be detached from the gun body, allowing the electrode wire to be accessed and replaced independently while maintaining stable connection during operation through the retaining ring and screw mechanism.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The electrode wire attachment system transitions from a fixed state to a dynamically adjustable state. The retaining ring with adjustable screws allows the electrode wire to be securely held during operation but easily removed when needed, providing dynamic control over the attachment state.

Inventive Principle:

Principle #15Dynamics

2Object-affected harmful factors

If the trigger guard is designed to prevent accidental actuation, then user safety is improved, but the mechanism complexity increases

Engineering Contradiction:

Improveaccidental trigger actuation preventionVSAvoidtrigger guard mechanism complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The trigger guard is positioned and configured to preemptively block access to the trigger before accidental actuation can occur. The guard creates a physical barrier that prevents unintended trigger movement while allowing deliberate trigger actuation when needed.

Inventive Principle:

Principle #9Preliminary anti-action

Solution Approach 2:

The trigger guard acts as an intermediary element between the user's finger and the trigger mechanism. It serves as a mediating structure that filters out accidental contact while permitting intentional activation, adding a layer of control without significantly complicating the overall system.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Ease of manufacture

If the electrode wire is permanently integrated into the gun body, then the structure is simpler, but the ease of maintenance and electrode replacement is reduced

Engineering Contradiction:

Improvestructural simplicityVSAvoidease of electrode wire replacement

Core Design Contradiction:

Ease of manufactureVSEase of repair

Solution Approach 1:

The gun is segmented into modular components with the air cap and electrode wire assembly separable from the main body. This segmentation maintains manufacturing simplicity while enabling easy maintenance, as the air cap can be removed and the electrode wire replaced without disassembling the entire gun.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The air cap is pre-configured with the electrode wire and retention mechanism, allowing it to be pre-assembled and then quickly installed or replaced on the gun body. This preliminary preparation of the electrode assembly simplifies both manufacturing and maintenance operations.

Inventive Principle:

Principle #10Preliminary action

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This design enhances the ease of use and safety of the electrostatic coating gun by allowing for quick electrode wire changes and preventing accidental trigger activation, thereby improving operational efficiency and user safety.

Implementation Method 1

the electrode wire 22 ionizes the area surrounding the outlet of the fluid nozzle 14 and a coating is charged by passing through the area in route to a grounded target

Methodology Applied

Scientific EffectElectrostatic charge conduction: Conduction (electrical)

Implementation Method 2

the electrode wire 22 ionizes the area surrounding the outlet of the fluid nozzle 14

Methodology Applied

Scientific EffectIonization: Ionisation

Data Source

PatentUS20250161963A1Electrostatic coating gun

Publication Date: 2025.05.22 CARLISLE FLUID TECHNOLOGIES LLC

AI summary

An electrostatic coating gun can include an air cap, fluid nozzle, a gun body, an air inlet, and a coating inlet, wherein the air cap comprises a removably attached electrode wire configured to conduct an electrostatic charge to a coating. The gun body comprises a handle, a trigger, and a trigger guard. The trigger guard comprises a base including a hinge, as well as a set of parallel extensions terminating in a set of parallel protrusions. The trigger guard is configured so that when the extensions are in frictional engagement with a first of a set of notches in the trigger guard base, the trigger can be prevented from being pulled toward the handle.