Double-Walled Pump Container With Replaceable Inner Bottle
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Solution Overview
Problem
Existing pump containers face challenges with complex coupling processes and high manufacturing costs, and refilling them can lead to contamination and resource waste.
Innovation Solution
A double container design featuring a neck cap with detachable pump assemblies and an inner container, allowing simplified coupling and easy refilling by using a screw cap and rotation prevention protrusions to synchronize the components, enabling easy detachment and reattachment of the inner container.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pump container with multiple coupled components is used to enable controlled content discharge, then the content discharge control is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The pump container is divided into separable modules: a reusable outer container with pump mechanism and a disposable inner container holding the content. This segmentation allows the complex pump assembly to be manufactured once and reused, while the simple inner container can be easily replaced when depleted, reducing overall device complexity and manufacturing costs.
Solution Approach 2:
The inner container is nested within the outer container, with the inner container fitting inside the outer container's cavity. The neck cap with pump assembly is coupled to the inner container, creating a nested structure where the disposable inner container is protected by and integrated with the reusable outer container system.
2Loss of substance
If the pump container is made refillable to reduce resource waste, then resource waste is reduced, but the refilling process becomes inconvenient and risks contamination
Solution Approach 1:
The inner container is designed as a disposable component that is discarded when depleted, eliminating the need for refilling operations. The reusable outer container with pump mechanism can be refilled with new inner containers, providing a practical alternative to traditional refilling methods and avoiding contamination risks associated with opening and refilling sealed containers.
3Ease of manufacture
If a simple tube design is used to reduce manufacturing cost, then manufacturing cost is reduced, but the content discharge amount cannot be controlled constantly
Solution Approach 1:
The system separates the simple disposable inner container from the reusable outer container that houses the pump mechanism. This allows the complex discharge control functionality to be concentrated in the durable outer container, while the inner container remains simple and inexpensive to manufacture.
Solution Approach 2:
The outer container with pump assembly serves multiple functions: it provides structural support, houses the pump mechanism for controlled discharge, and can be reused with multiple inner containers. This multi-functionality justifies the higher initial manufacturing cost by eliminating the need to manufacture a new complete container assembly with each refill.
Data Source
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AI summary
One embodiment of the present invention provides a double container. The double container includes: an inner container adapted to store a given content therein and having a neck formed on top thereof; an outer container adapted to accommodate at least a portion of the inner container therein; a neck cap coupled to the neck of the inner container and having at least a portion accommodated in the inner container; pump assemblies coupled to top of the outer container, detachably coupled to the outer peripheral surface of the neck cap, having at least portions accommodated in the neck cap and inserted inside the inner container, and adapted to discharge the content therefrom; and a nozzle adapted to be pressurized by a user to discharge the content transferred from the pump assemblies through a discharge hole.