Protective Cap Ventilation Mechanism for Pharmaceutical Dispensers
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Solution Overview
Problem
Existing discharge devices for pharmaceutical and cosmetic liquids face challenges in preventing contamination and ensuring rapid drying of residual liquids, particularly when a protective cap is fitted, as ventilation openings can admit microorganisms.
Innovation Solution
A discharge device with a protective cap comprising an inner and outer cap, where the outer cap is initially sealed to isolate ventilation openings, and can be moved to communicate with the environment, featuring blocking elements that prevent re-sealing to ensure germproof and airtight conditions, and an adjustable blocking element to prevent accidental closure of ventilation openings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If ventilation openings are provided in the protective cap to enable rapid drying of residual liquid, then drying speed is improved, but microbial contamination risk increases
Solution Approach 1:
The protective cap is pre-assembled in a sterile environment before use, with the outer cap already in place sealing the ventilation openings. This preliminary sealing action prevents microbial contamination during storage and transport, while allowing rapid drying when needed during actual use.
Solution Approach 2:
The protective cap is divided into two separate parts: an inner cap that contains the ventilation openings for drying, and an outer cap that seals these openings. This segmentation allows the system to provide both rapid drying capability (through the inner cap's ventilation) and contamination protection (through the outer cap's seal) at different times as needed.
2Reliability
If the outer cap is sealed to the inner cap to prevent contamination, then germproof protection is improved, but ventilation opening functionality is lost
Solution Approach 1:
The protective cap system transitions from a static sealed state (outer cap on inner cap preventing contamination) to a dynamic functional state (outer cap removed allowing ventilation). This dynamic design allows the system to adapt between contamination protection and drying functionality as needed during different phases of use.
Solution Approach 2:
The outer cap acts as an intermediary element that can be selectively applied or removed. When present, it provides germproof protection by sealing the ventilation openings; when removed, it allows the inner cap's ventilation openings to function for rapid drying. This intermediary component enables the system to achieve both contradictory requirements at different times.
3Reliability
If the protective cap structure is made complex with inner and outer caps to prevent contamination, then contamination protection is improved, but device complexity increases
Solution Approach 1:
The protective cap uses a nested structure where the outer cap envelops the inner cap. This nesting arrangement provides enhanced contamination protection through the dual-cap design while maintaining relatively simple individual components that can be easily manufactured and assembled.
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 enables rapid drying of residual liquids while preventing microbial contamination by maintaining a germproof and airtight seal, ensuring the integrity of the contents during storage and use.
Implementation Method 1
the inner cap and the outer cap are sealingly in contact with each other and the at least one ventilation opening is separated in an airtight and germproof manner from the environment
Implementation Method 2
the at least one ventilation opening communicates with the environment... Rapid drying of the residual liquid is achieved by virtue of the communication between the interior of the protective cap
Data Source
Figure 1~3
Figure 4~5
Figure 6~7
AI summary
The invention relates to a protective cap (3) for a dispenser (2) and to a discharge device (1) comprising a dispenser (2) for discharging pharmaceutical and/or cosmetical liquids, wherein the dispenser (2) comprises a liquid reservoir (21) and an outlet opening (24) through which the liquid (100) can be discharged into a surrounding atmosphere, wherein the protective cap (3) has an inner cap (4) and an outer cap (5), the inner cap (4) has at least one ventilation opening (40) for communication between an interior of the protective cap (3) and an external environment, wherein, before a use, the outer cap (5) is mounted on the inner cap (4) in a first position in which the inner cap (4) and the outer cap (5) are sealingly in contact with each other and the at least one ventilation opening (40) is separated in an airtight and germproof manner from the environment, and the outer cap (5) is movable relative to the inner cap (4) from the first position to at least a second position in which the inner cap (4) and the outer cap (5) are not sealingly in contact with each other and the at least one ventilation opening (40) communicates with the environment.