Knock-Type Liquid Container with Insulated Air Gap and Stepped Nozzle
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Solution Overview
Problem
Existing knock-type ejection containers for dental materials face issues with inconsistent liquid dispensing due to temperature changes, leading to excessive ejection and liquid creep around the nozzle, and require frequent cleaning of the brush ear for hygiene, complicating the application process.
Innovation Solution
A knock-type ejection container with a double-wall structure and a heat-insulating air gap between the inner and outer circumferential walls, featuring a stepped nozzle design to prevent liquid creep and a piston mechanism that allows controlled dispensing of dental materials without relying on fingertip pressure, ensuring stable and hygienic operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the container is held by hand to conduct body temperature to the interior, then the liquid becomes less viscous and easier to eject, but the liquid volatilizes excessively and ejects more than necessary
Solution Approach 1:
A heat-insulating envelope surrounds the container body, acting as an intermediary barrier between the hand and the liquid-containing chamber. This envelope prevents direct heat conduction from the hand to the liquid, reducing volatilization while still allowing the container to be held and operated easily.
2Device complexity
If the container relies on fingertip pressure to eject liquid, then the structure remains simple, but the ejection amount becomes inconsistent and unstable
Solution Approach 1:
The container replaces the mechanical fingertip pressure system with a knock-activated piston mechanism. Knocking the container triggers a piston to pressurize the liquid-containing chamber, providing consistent and controlled ejection amounts without relying on variable fingertip pressure, while maintaining relatively simple overall structure.
3Productivity
If the liquid is ejected under pressure from the nozzle, then the liquid is dispensed efficiently, but the liquid rises and creeps around the ejection port
Solution Approach 1:
The nozzle is designed with an asymmetric stepped structure featuring a protrusion that extends into the liquid-containing chamber. This asymmetric geometry creates a flow direction control effect, allowing liquid to be ejected efficiently through the nozzle while preventing lateral flow and creeping around the ejection port.
4Ease of operation
If the brush ear is soaked with liquid for application, then the application process is simplified, but frequent cleaning is required for hygiene
Solution Approach 1:
The invention extracts and eliminates the brush ear component entirely, replacing it with a direct nozzle ejection system. Liquid is dispensed directly onto the target surface through the nozzle, removing the intermediate brush ear that required soaking and frequent cleaning, thereby simplifying the application process and eliminating hygiene maintenance.
Data Source
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AI summary
[Problems] To provide an ejection container capable of falling a liquid in drops from the container body without relying on the sense of the fingertips and without affected by a change in the temperature. [Means for Solution] A knock-type ejection container 1 in which an ejection port 8 is provided at one end of a container body 2, a knock button 4 is provided at the other end thereof, a container chamber 22 is provided in the container body 2 to contain a liquid, and the liquid contained in the container chamber 22 is ejected from the ejection port 8 being interlocked to the operation of the knock button 4.