Spray Head Snap-Action Coupling for Child-Proof Liquid Discharge
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Solution Overview
Problem
Existing discharge heads for liquids, such as pharmaceuticals and personal care products, lack effective child-proofing mechanisms to prevent unwanted discharge, which can lead to safety issues, especially when handled by children.
Innovation Solution
A discharge head with a snap-action coupling mechanism that requires manual force to switch between secure and release positions, featuring a releasable snap-action coupling that locks in place to prevent accidental discharge, and includes audible and haptic feedback to confirm the rotational position, ensuring the discharge opening is only aligned with the aperture when intentionally released.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a simple rotational mechanism is used to switch between secured and released states, then ease of operation is improved, but reliability against unwanted discharge deteriorates
Solution Approach 1:
The discharge head requires a preliminary rotational movement to reach an intermediate position before liquid discharge can occur. This preliminary action (rotation to align discharge opening with aperture) must be completed before the useful action (liquid discharge) can take place, preventing accidental discharge while maintaining ease of operation through a simple two-step mechanism
Solution Approach 2:
The system transitions from a static blocked state to a dynamic intermediate state through rotation, where the discharge opening moves into alignment with the aperture. This dynamic transition creates a controllable state change that enhances reliability while preserving ease of operation through intuitive rotational motion
2Ease of operation
If a rotational alignment mechanism is used to enable discharge, then ease of operation is improved, but child-proofing effectiveness deteriorates
Solution Approach 1:
The mechanism requires a preliminary rotational action to align the discharge opening with the aperture before liquid can be discharged. This preliminary step creates a barrier that prevents children from accidentally activating discharge, while still allowing easy operation by adults who can deliberately perform the rotation and subsequent depression action
3Productivity
If the discharge head can be easily rotated to the open position, then productivity is improved, but safety against unwanted discharge deteriorates
Solution Approach 1:
The system requires a preliminary rotational movement to prepare the discharge path before liquid discharge can occur. This preliminary action enables quick and efficient operation (improving productivity) while simultaneously providing a safety mechanism that prevents accidental discharge (maintaining reliability) through the deliberate two-step process of rotation followed by depression
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 significantly enhances child-proofing by making it difficult for children to inadvertently discharge liquids, as the secure position requires additional force and specific alignment, thereby reducing the risk of unwanted liquid release.
Implementation Method 1
a releasable snap-action coupling, by means of which the outer shell, on the one hand, and the inner body or the screen body, on the other hand, can be coupled rotationally in the closed rotational position
Implementation Method 2
such that the open rotational position can be reached again only after manual application of force to a release surface of the releasable snap-action coupling
Data Source
AI summary
A liquid discharge head switchable manually between secured and released states. In the secured state, liquid discharge is prevented, and in the released state, liquid discharge is enabled. The discharge head has a discharge channel and a discharge opening at an end of the discharge channel. Further, an outer shell is provided and has a discharge aperture through which the liquid delivered through the discharge opening is discharged. For switching purposes, the outer body has, internally in relation to the outer shell, a rotatable inner or screen body. A releasable snap-action coupling is provided, by which the outer shell and the inner body are coupled rotationally in a closed rotational position such that an open rotational position is reached again only after manual application of force to a release surface of the coupling.