Vaporization Device Activation Protection via Capacitive Contact
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Solution Overview
Problem
Existing electronic vaporization devices (EVDs) are prone to inadvertent activation, leading to leakage and potential fire risks due to their design, which compromises safety and reliability for frequent users.
Innovation Solution
The EVD incorporates two or more contact points on its outer surface that require physical connection to an object with a specific resistance range to activate, utilizing a detection circuit and power supply system to ensure safe and controlled power delivery to the heater, including features like a starter circuit, amplifier circuit, and short-circuit protection to prevent unintended activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a start button, microphone sensor, or switch is used to activate the EVD, then the device can be easily operated, but the device is prone to inadvertent activation leading to leakage and fire risks
Solution Approach 1:
The patent introduces an intermediary mechanism (capacitive sensing system with multiple contact points) between the user and the heater activation. Instead of direct button pressing or simple switch activation, the system uses contact points that detect the presence and characteristics of a finger through capacitive coupling, requiring intentional user interaction while preventing accidental activation from drops or unintended contact.
Solution Approach 2:
The patent changes the activation parameter from simple mechanical contact (button press) to electrical parameter detection (capacitive sensing). By monitoring changes in electrical capacitance and resistance at multiple contact points, the system can distinguish between intentional activation (finger placed deliberately on contact points) and accidental contact (dropping the device or unintended touch), thus improving safety while maintaining ease of use.
2Device complexity
If the EVD uses simple activation mechanisms like a start button, then the device structure remains simple, but the device lacks protection against inadvertent activation
Solution Approach 1:
The patent segments the activation mechanism into multiple independent contact points (first contact point, second contact point, etc.) rather than using a single button or switch. Each contact point is monitored independently by the control circuit, which requires detection at multiple points simultaneously or in sequence to activate the heater. This segmentation prevents inadvertent activation while maintaining relatively simple device structure.
Solution Approach 2:
The control circuit acts as an intermediary that processes signals from multiple contact points before activating the heater. This intermediary layer analyzes the pattern, timing, and characteristics of contact detection to determine whether activation is intentional, thereby preventing fire risks and leakage from accidental activation without significantly complicating the overall device structure.
3Reliability
If the EVD uses contact points requiring physical connection to an object with specific resistance, then safety against inadvertent activation is improved, but the device complexity increases
Solution Approach 1:
The patent implements a self-service mechanism where the user's finger itself serves as part of the activation system. The capacitive sensing circuit detects the electrical characteristics (capacitance and resistance) of the user's finger placed on the contact points. The control circuit automatically analyzes these characteristics and activates the heater only when the finger's electrical properties match expected ranges, eliminating the need for additional complex verification mechanisms.
Solution Approach 2:
The patent monitors changes in electrical parameters (capacitance and resistance) at the contact points to detect finger placement. By setting predetermined thresholds for these electrical parameters, the system can reliably distinguish between intentional activation (finger with specific resistance range placed on contacts) and accidental contact, improving safety without requiring overly complex control logic.
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 significantly reduces the risk of inadvertent activation, enhancing safety by ensuring the device can only be activated when properly connected to a user's body, thereby preventing leakage and fire hazards, making it a more reliable alternative to traditional tobacco products.
Implementation Method 1
a power source providing electric power to the heater, said electric power being converted to thermal power
Implementation Method 2
The EVD may also include a detection circuit for detecting whether an object having a resistance within a predetermined range is physically connected to two or more contact points
Data Source
AI summary
An electronic vaporization device with activation protection is provided. The electronic vaporization device includes a heater for heating a vaporizable material and a compartment housing the vaporizable material, said compartment being thermally connected to the heater. The electronic vaporization device further includes a power source providing electric power to the heater, said electric power being converted to thermal power. The electronic vaporization device further includes two or more contact points disposed on the outside surface of the electronic vaporization device. The electric power is provided when the two or more contact points are physically connected to an object having a resistance within a predetermined range.