Spray Head Reflectance Detection for Refill Safety
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Solution Overview
Problem
Existing spraying devices for fragrances and deodorizing agents lack effective protection against vandalism and misuse, as they do not differentiate between standard and potentially dangerous refill types, posing health and safety risks.
Innovation Solution
Incorporating detection means that distinguish between areas of lower and higher reflectance on the spray head of the refill, preventing actuation if a potentially dangerous refill is detected, and providing an end-of-life indication through a counting mechanism to minimize power consumption and notify users when a refill needs replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If detection means are added to distinguish between different refill types, then safety and protection against vandalism is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical verification systems with an optical detection system using a light source and photodetector to read reflectance patterns on the refill. This substitution maintains high reliability for identifying authorized refills while reducing mechanical complexity compared to physical verification mechanisms.
Solution Approach 2:
The patent introduces an optical intermediary system consisting of a light source, photodetector, and reflectance-patterned refill surface. This intermediary enables safe communication between the device and refill without direct mechanical or electrical contact, allowing verification of refill authenticity while maintaining device safety and reducing complex coupling mechanisms.
2Loss of information
If a counting mechanism is implemented to track refill usage, then end-of-life indication is improved, but use of energy increases
Solution Approach 1:
The patent implements a self-service counting mechanism where the device automatically tracks the number of actuations of the refill and autonomously determines when the refill has reached its end-of-life. This eliminates the need for user intervention or external monitoring systems, providing accurate end-of-life indication while minimizing energy consumption through simple incrementing logic rather than complex monitoring circuits.
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 solution effectively prevents unauthorized or dangerous refills from being used, ensuring user safety and reducing the risk of vandalism, while also optimizing battery life and providing an efficient end-of-life notification system.
Implementation Method 1
detection means configured to distinguish between at least one area of lower reflectance and at least one area of relatively higher reflectance on the spray head of the refill
Data Source
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AI summary
A spraying device is described, the device comprising a refill of fluid therein, wherein the refill comprises a body forming a reservoir for the fluid and a spray head located at the uppermost part of the refill in fluid communication with the reservoir, and wherein the device comprises a housing adapted to receive the refill therein and having an aperture suitable for permitting, in use, the spraying of the fluid from an exit orifice of the spray head therethrough the device further comprising actuation means configured for periodic actuation of the refill, wherein the device is provided with detection means configured, in use, to interrogate the spray head to distinguish between at least one area of lower reflectance and at least one area of relatively higher reflectance on the spray head of said refill, characterised in that the spray head is provided with at least one portion shaped to substantially reflect the detection means interrogation back toward said means and is provided with at least one portion shaped to substantially deflect the detector means interrogation away from said means. Methods of operation of such a spraying device are also described