Child-Resistant Bottle Closure with Integrated Plunger Dosing
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Solution Overview
Problem
Current child-resistant packaging for liquid household products, including oral medications and cosmetics, faces challenges in effectively preventing access by children under five while ensuring ease of use for adults, particularly with the increasing demand for highly concentrated liquid dosage forms.
Innovation Solution
A child-resistant liquid dispensing closure system that integrates a plunger assembly with a top cap, inner sleeve, and cap assembly, featuring a disc-shaped flange for user handling, a rod for sealing, and a child-resistant collar with locking clips, which eliminates the need for separate measuring devices and enhances tampering protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional packaging is used, then children can easily open the bottle, but adults can also easily access the contents
Solution Approach 1:
The closure system is divided into multiple functional segments: an outer cap assembly with child-resistant locking mechanism, an inner liner, and a separate plunger assembly. The plunger assembly includes a rod, seal, and flange that work independently to provide dispensing control. This segmentation allows each component to be optimized for its specific function while collectively achieving both child resistance and adult usability.
Solution Approach 2:
The closure system employs dynamic elements including a movable plunger assembly that can be pushed to dispense liquid, a rotatable outer cap that locks and unlocks, and a flexible seal that maintains pressure. The child-resistant collar with locking clips provides a dynamic locking mechanism that prevents accidental opening by children but can be deliberately opened by adults. These dynamic features enable the system to adapt between secure closed state and controlled dispensing state.
2Measurement precision
If separate measuring devices are used, then dosing accuracy is achieved, but device complexity increases
Solution Approach 1:
The plunger assembly integrates multiple functions into a single component: it acts as a sealing element, a dispensing actuator, and a dosing control mechanism. The flange portion of the plunger assembly can be configured with measurement markings or volume indicators, eliminating the need for separate measuring devices like droppers or syringes. This merging reduces the overall number of components while maintaining dosing accuracy.
Solution Approach 2:
The plunger assembly serves multiple purposes: sealing the bottle opening, controlling liquid dispensing, providing dosing measurement, and maintaining internal pressure. The seal element can be configured with different geometries to work with various bottle types, making the closure system universally applicable. This multi-functionality eliminates the need for additional specialized components, reducing device complexity while achieving precise dosing.
3Reliability
If tampering protection is enhanced, then security is improved, but ease of operation for adults may be reduced
Solution Approach 1:
The child-resistant collar features an asymmetric locking mechanism with locking clips that engage with specific notches or features on the outer cap. The geometry of the collar and its engagement features is designed to be difficult for children to manipulate but straightforward for adults. The locking clips may require a specific twisting motion or force application that is beyond children's capabilities but natural for adults, achieving asymmetric usability.
Solution Approach 2:
The closure system includes pre-configured engagement features and locking mechanisms that are set during manufacturing. The locking clips are pre-positioned to engage with specific features on the outer cap, and the seal is pre-configured to maintain pressure. This preliminary configuration ensures that the tampering protection is built-in and requires minimal user intervention to activate, maintaining ease of operation for adults while providing robust security.
Data Source
AI summary
The present application provides a child-resistant liquid dispensing closure apparatus, which includes a plunger and pipet, and preferably a dosage measuring system that is integrated that appears as the plunger is withdrawn from the pipet. The closure may be used for a bottle containing a liquid for oral administration of solutions, syrups, suspensions, elixirs, tinctures, concentrates, and the like.