Hand-Held Dispenser Sliding Lock for Child-Resistant Safety
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Solution Overview
Problem
Designing hand-held dispensing devices that are compact, portable, and mass-producible while ensuring 'child-resistant' features to prevent accidental operation, yet remain simple for adults to use, especially for medical substances like nicotine formulations, is challenging due to competing design factors.
Innovation Solution
A hand-held dispensing device with a sliding handle mechanism that locks into an operative position, featuring a resilient actuating member and a locking assembly to prevent accidental dispensing, combined with a telescopic fit and a two-step movement for the transmission plate to secure the dispenser head, ensuring easy operation while maintaining a 'child-resistant' design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If child-resistant features are added to prevent accidental operation, then safety is improved, but device complexity increases
Solution Approach 1:
The device employs a dynamic sliding mechanism where the dispenser body can move between a retracted non-use position and an extended operative position. This dynamic positioning, combined with the locking assembly, creates a system that is simple yet effective at preventing accidental operation while maintaining ease of use when needed.
Solution Approach 2:
The device is divided into distinct functional segments: the handle, the dispenser body, the locking assembly, and the actuating member. This segmentation allows each component to perform its specific function independently, contributing to overall safety without requiring complex integration across the entire device.
2Reliability
If a locking assembly is added to secure the dispenser body, then accidental dispensing is prevented, but ease of operation decreases
Solution Approach 1:
The locking assembly is designed to automatically engage when the dispenser body is in the non-use position, requiring no active user intervention to maintain safety. The spring-loaded mechanism self-activates based on the position of the dispenser body, providing passive safety that does not complicate the user experience.
Solution Approach 2:
The locking assembly incorporates a spring-loaded resilient member that dynamically adapts to the position of the dispenser body. When the body is retracted, the spring engages the locking feature; when extended, the spring releases it. This dynamic behavior provides automatic safety engagement without requiring complex user interaction.
3Ease of operation
If the dispenser body is made slidable for manual movement, then ease of operation is improved, but mechanical shock resistance worsens
Solution Approach 1:
The sliding mechanism is designed to be rigid and guided, allowing smooth manual movement during normal operation while providing structural stability during impact events. The guide features and locking assembly work together to ensure the dispenser body remains securely positioned when locked, preventing movement that could lead to leakage during mechanical shock.
Solution Approach 2:
The locking assembly engages the dispenser body in advance before any potential mechanical shock occurs. By pre-securing the dispenser body in the locked position, the system prepares for potential impacts, ensuring the chamber is protected from shock that might otherwise cause leakage.
4Reliability
If the outlet is covered in non-use position, then accidental dispensing is prevented, but accessibility for use decreases
Solution Approach 1:
The outlet coverage is dynamically linked to the position of the dispenser body. When the body is retracted to the non-use position, the outlet is automatically covered by the handle or housing structure. When the body is extended to the operative position, the outlet becomes automatically exposed and accessible. This dynamic coupling ensures safety and accessibility without requiring separate controls.
Solution Approach 2:
The safety function of covering the outlet is merged with the positioning function of the dispenser body. The same mechanical movement that positions the dispenser for use or storage simultaneously controls outlet coverage, eliminating the need for separate safety mechanisms and simplifying the overall device operation.
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 device effectively balances portability and safety by allowing easy operation for adults while preventing accidental dispensing, especially when carried in a pocket or handbag, enhancing user safety and simplifying the dispensing process.
Implementation Method 1
the actuating member is resiliently mounted for movement relative to the dispenser body against the action of a biasing member
Implementation Method 2
an actuating member mounted for movement relative to the dispenser body against the action of a biasing member
Data Source
Figure 1a
Figure 1b
Figure 1c
AI summary
A hand-held dispensing device for dispensing a substance, the device comprising: a dispenser incorporating: i) a dispenser body defining a dispensing chamber for holding the substance; ii) an outlet in communication with the dispensing chamber; iii) a dispensing mechanism for dispensing the contents of the dispensing chamber through the outlet and iv) an actuating member resiliently mounted for movement relative to the dispenser body, against the action of a biasing member, to actuate the dispensing mechanism; the dispenser being operably connected to a handle for manual sliding movement relative to the handle from a non-use position, in which the handle covers the outlet, to an operative position, in which the outlet is uncovered; the device further comprising a locking assembly for releasably locking the dispenser body to the handle in the operative position to prevent said manual sliding movement of the dispenser body, whereby a user may grasp the handle and effect manual movement of the actuating member relative to the handle and the dispenser body, against the action of the biasing member, so as to actuate the dispensing mechanism and dispense the contents of the dispensing chamber through the uncovered outlet.