Magnetic Cartridge Valve Spacing for Consistent E-Cigarette Draw

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Solution Overview

Problem

Conventional electronic cigarettes face challenges in maintaining consistent draw resistance due to the complexity and cost of achieving precise processing accuracy in manufacturing, leading to inconsistent actual draw resistance with the designed resistance.

Innovation Solution

The electronic cigarette incorporates a magnetic valve and magnetic body that attract each other to form a controlled interval between the main body and the cartridge, allowing for accurate adjustment of draw resistance through the magnetic interaction, reducing the reliance on precise manufacturing tolerances.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If processing accuracy is improved to control interval between main body and vapor pad, then draw resistance can be maintained within acceptable range, but manufacturing complexity and cost increase

Engineering Contradiction:

Improveprocessing accuracyVSAvoidmanufacturing complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent replaces the conventional mechanical positioning system (relying on precise machining of the interval between main body and vapor pad) with a magnetic field-based system. A magnetic component is embedded in the vapor pad, and a magnetic ring is installed on the main body, creating a magnetic attraction force that automatically positions and maintains the vapor pad at the correct interval from the main body, eliminating the need for high-precision mechanical tolerances

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the control parameter from mechanical dimension (interval distance controlled by machining accuracy) to magnetic field parameter (attraction force between magnetic components). By adjusting magnetic component strength and positioning, the interval is controlled through magnetic force rather than mechanical tolerance, thereby reducing manufacturing complexity while maintaining consistent draw resistance

Inventive Principle:

Principle #35Parameter changes

2Manufacturing precision

If processing accuracy is improved to control interval between main body and vapor pad, then draw resistance consistency improves, but manufacturing cost increases

Engineering Contradiction:

Improveprocessing accuracyVSAvoidmanufacturing cost

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The patent replaces expensive high-precision mechanical machining with a magnetic positioning system using embedded magnetic components. The magnetic attraction automatically maintains the correct interval, eliminating the need for costly precision machining equipment and processes while ensuring consistent draw resistance across production batches

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent uses relatively inexpensive magnetic components (magnetic material embedded in vapor pad and magnetic ring on main body) to replace expensive precision machining processes. The magnetic components can be manufactured at lower cost through standard manufacturing techniques compared to achieving tight mechanical tolerances

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Manufacturing precision

If processing accuracy is improved to control interval, then actual draw resistance matches designed draw resistance, but control accuracy requirement increases

Engineering Contradiction:

Improveprocessing accuracyVSAvoidcontrol accuracy

Core Design Contradiction:

Manufacturing precisionVSMeasurement precision

Solution Approach 1:

The patent replaces mechanical measurement and control of the interval (requiring high control accuracy in machining) with a magnetic field-based positioning system. The magnetic attraction force naturally positions the vapor pad at the correct interval, and the magnetic component design can be optimized to provide stable attraction, reducing the need for high-precision control during manufacturing

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 solution enables consistent draw resistance with the estimated design, simplifying manufacturing and reducing costs by eliminating the need for high-accuracy production processes while ensuring accurate airflow control.

Implementation Method 1

The magnetic body attracts the magnetic valve to move and protrude from the bottom surface of the accommodating slot

Methodology Applied

Scientific EffectMagnetic attraction: Magnetism

Data Source

PatentUS12041971B2Electronic cigarette

Publication Date: 2024.07.23 PEGATRON

AI summary

An electronic cigarette is provided. The electronic cigarette includes a main body and a cigarette cartridge. The main body includes an accommodating slot and a magnetic valve. The magnetic valve movably protrudes from a bottom surface of the accommodating slot. The cigarette cartridge includes a joint surface and a magnetic body that is disposed on the joint surface. The cigarette cartridge is configured to be disposed in the accommodating slot. The magnetic body attracts the magnetic valve to move and protrude from the bottom surface of the accommodating slot, so that the magnetic body is connected to the magnetic valve, and an interval is formed between the cigarette cartridge and the main body.