Smoking Substitute Device With Movable Cap for Heating Element Cleaning

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Solution Overview

Problem

Existing smoking substitute systems, particularly those using the Heated Tobacco (HT) approach, face challenges with residual debris accumulation in the device after use, which can lead to safety risks and impair flavor, and cleaning the heating element is often difficult.

Innovation Solution

A smoking substitute device with a cap displacement feature that allows easy access to the heating element for cleaning, featuring a movable cap that creates an aperture for cleaning and includes a retainer mechanism to prevent loss, facilitating debris removal and enhancing user safety and experience.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the cap is fixed to enclose the heating element, then the heating element is protected from contamination, but cleaning the heating element becomes difficult

Engineering Contradiction:
Improveprotection of heating elementVSAvoidcleaning accessibility
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The cap is designed to be movable rather than fixed, allowing it to be displaced from the first position (enclosing the heating element) to the second position (providing access). This dynamic design enables the cap to serve dual functions: protecting the heating element during operation and facilitating cleaning when needed.

Inventive Principle:
Principle #15Dynamics

2Ease of operation

If the cap is made movable to allow cleaning access, then cleaning becomes easy, but the cap may be lost

Engineering Contradiction:
Improvecleaning accessibilityVSAvoidcap retention
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The cap displacement mechanism is segmented into distinct positions (first position for enclosure, second position for access) with a retainer mechanism that holds the cap in each position. This segmentation allows the cap to be easily moved for cleaning while the retainer prevents accidental loss by securing the cap in the enclosed position during normal operation.

Inventive Principle:
Principle #1Segmentation

3Reliability

If residual debris accumulates in the device, then safety risks increase and flavor impairs, but cleaning is difficult

Engineering Contradiction:
Improvesafety and flavor qualityVSAvoidcleaning difficulty
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The device enables preliminary cleaning action by providing easy access to the heating element through cap displacement. Users can remove debris before it accumulates to problematic levels, preventing safety issues and flavor degradation rather than dealing with accumulated residue.

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

The cap displacement feature improves aerosol generation and user safety by enabling easy cleaning of the heating element, reducing the risk of debris-related issues and maintaining device performance.

Implementation Method 1

heat may be imparted to the tobacco material by a heating element of the device

Methodology Applied
Scientific EffectHeating: Heating

Implementation Method 2

the vapour cools and condenses to form an aerosol for inhalation by the user

Methodology Applied
Scientific EffectCondensation: Condensation

Data Source

PatentEP3941273B1Smoking substitute system
Publication Date: 2025.10.08 IMPERIAL TOBACCO LTD
  • EP3941273B1 patent drawingFigure 1A~1B
  • EP3941273B1 patent drawingFigure 2A
  • EP3941273B1 patent drawingFigure 2B

AI summary

A smoking substitute system comprising a device and an aerosol forming article is disclosed. The device comprises a body (209) and a heating element (223) projecting from the body along a longitudinal axis of the housing. Further, the device comprises a cap (210) engageable with the body for at least partly enclosing the heating element. The cap is configured to be moveable away from the longitudinal axis between a first position and a second position. The cap at the second position defines an aperture (251) for accessing the heating element, with portion of the cap being engaged with the body.