Metal Double-Structure Dropper Cap With Adhesive-Free Coupling
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Solution Overview
Problem
Existing dropper caps with a double structure face stability issues due to the use of adhesives for joining the outer and inner caps, and recyclability is compromised when different materials are used.
Innovation Solution
The dropper cap is designed with an inner cap and an outer cap made of the same metal material, allowing for easy separation and integration for disposal or recycling, and eliminating the need for adhesives by using fitting protrusions for stable coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesives are used to join the outer cap to the inner cap, then the joining stability is improved, but the recyclability deteriorates due to chemical residues and separation difficulty
Solution Approach 1:
The patent removes adhesives from the joining system entirely, extracting the harmful chemical element from the assembly process. The outer cap and inner cap are designed with complementary geometric features (protrusions and recesses) that enable mechanical connection without chemical substances, thus eliminating recyclability barriers while maintaining joining stability.
Solution Approach 2:
The patent replaces the chemical joining mechanism (adhesives) with a mechanical interlocking system. The outer cap includes protrusions that fit into corresponding recesses on the inner cap, creating a purely mechanical connection that is both stable during use and easily separable for recycling, substituting chemical bonds with physical geometric interlocking.
2Reliability
If different materials are used for the outer cap and inner cap, then the functional performance is improved, but the recyclability deteriorates due to separation difficulty
Solution Approach 1:
The patent employs the same material for both the outer cap and inner cap, ensuring homogeneity throughout the assembly. This uniform material composition simplifies recycling processes by eliminating the need to separate different materials, while the geometric interlocking design maintains functional performance requirements.
3Reliability
If a double structure of inner cap and outer cap is adopted, then the protection and heat resistance are improved, but the device complexity increases
Solution Approach 1:
The patent implements a nested structure where the inner cap is placed within the outer cap, with the outer cap enveloping at least a portion of the inner cap. This nesting arrangement provides enhanced protection and heat resistance through layered insulation, while the integrated geometric interlocking features simplify the overall assembly without significantly increasing manufacturing complexity.
Data Source
AI summary
According to an embodiment of the present invention, provided is a dropper cap which can be detached from a container part accommodating contents and which suctions or discharges the contents. The dropper cap comprises; an inner cap which can be detached from the container part; and an outer cap coupled to the inner cap so as to encompass at least a part of the inner cap, wherein the inner cap and the outer cap can be formed from a metal material.