Dental Capsule Container Sealing Structure for Backflow Prevention
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Solution Overview
Problem
Existing dental capsule containers face issues with airtightness leading to backflow of components, difficulty in maintaining a 90° angle for nozzle insertion, and increased physical burden on patients due to limited visibility and nozzle flexibility.
Innovation Solution
The dental capsule container features an annular fitting mechanism to prevent backflow, a nozzle design with defined angles and dimensions for easy insertion, and air release passages to manage pressure, enhancing mixing and discharge efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the airtightness of the mixing room and dispensing room is improved, then the sealing performance is enhanced, but the inner pressure rises causing the piston member to be pushed back and component backflow
Solution Approach 1:
The sealing structure is divided into multiple sealing elements (first sealing element and second sealing element) positioned at different locations. The first sealing element seals between the mixing room and the space around the piston, while the second sealing element seals between the dispensing room and the space around the piston. This segmentation allows pressure to be contained effectively without causing backflow, as each sealing element handles specific pressure zones independently.
Solution Approach 2:
A communication passage is introduced as an intermediary channel that allows controlled pressure equalization between the mixing room and dispensing room. This passage prevents excessive pressure buildup that would push the piston back, while maintaining sufficient sealing to prevent component backflow. The communication passage acts as a pressure relief mediator.
2Adaptability or versatility
If the nozzle is made flexible to adapt to different insertion angles, then the adaptability is improved, but the visibility of the nozzle tip decreases and physical burden on patients increases
Solution Approach 1:
The nozzle is designed with a flexible portion that can dynamically adjust its angle of insertion. This flexible section allows the nozzle to bend and adapt to different oral cavity angles while maintaining a straight configuration during discharge. The dynamic flexibility provides adaptability without compromising visibility, as the flexible portion remains visible throughout the procedure.
3Ease of operation
If the nozzle length is increased to improve visibility, then the visibility is enhanced, but the device complexity and physical burden increase
Solution Approach 1:
The nozzle incorporates a flexible portion with a specific length that provides both visibility and adaptability. This flexible section is positioned to extend the visible portion of the nozzle while maintaining a manageable overall length. The dynamic flexibility allows the nozzle to reach different angles without requiring excessive length, thereby reducing structural complexity.
Data Source
AI summary
A dental capsule container that can mix a first component and a second component in appropriate proportions. An annular fitting portion extending in a radial direction and a circumferential direction is formed at an end close to the operating portion of the piston portion of the piston member. An annular fitted portion fitted by the annular fitting portion is formed in a state in which the pressing rod portion opens the second discharge port by which the piston member is inserted in the second cylindrical portion of the chamber member in an inner circumferential portion adjacent to the third opening portion of the second cylindrical portion of the chamber member. The shape and dimensions of the annular fitting portion and the annular fitted portion are determined so that the fitting is not released due to an increase in inner pressure of the mixing portion.