Dental Mixing Tip Connection Structure for Leak Prevention
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Solution Overview
Problem
Traditional dental impression material cartridges face issues with inconvenient connection methods, leading to unstable connections and leakage due to specific directional requirements and varying contact areas between mixing tip components, resulting in material leaks under pressure.
Innovation Solution
A redesigned mixing tip connective structure featuring a top connective plate with opposing mixing tip ends, rotational bumps, and guide pins, along with a tapering internal environment in the connective socket, allows for easy and secure connection in any direction, ensuring uniform contact and preventing leaks by eliminating gaps between connecting tubes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional mixing tip connection structure with positioning grooves and rotational connective grooves is used, then the mixing tip can be connected to the impression material cartridge, but the connection requires specific directional alignment which reduces ease of operation
Solution Approach 1:
The patent employs asymmetric guide pin configurations where the first guide pin has a different shape or orientation than the second guide pin, allowing the mixing tip to be inserted in only one correct orientation. This asymmetric design eliminates the need for complex rotational alignment while ensuring proper connection direction, thereby improving ease of operation without excessive complexity
Solution Approach 2:
The patent introduces guide pins as intermediary elements that mediate between the mixing tip and the impression material cartridge. These guide pins protrude from the connective ends and fit into corresponding recesses, serving as the intermediary mechanism that enables directional alignment and secure connection without requiring complex user manipulation
2Reliability
If connecting wings are inserted into rotational connective grooves for stabilization, then the mixing tip can be secured, but the contact area varies between wings leading to unstable connection and material leakage under pressure
Solution Approach 1:
The patent applies local quality by creating uniform contact areas at specific locations where the guide pins make contact with the connective ends. By designing the guide pins and their corresponding recesses to have matched geometries, the connection stability is enhanced at these critical local contact points, ensuring even force distribution and preventing material leakage under pressure
3Ease of manufacture
If the mixing tip connective structure uses traditional rotational grooves and positioning bumps, then connection is possible, but gaps form between connecting tubes and ejaculatory tubes causing impression material leakage
Solution Approach 1:
The patent employs curved or tapered geometries in the guide pin profiles and their corresponding recesses, replacing traditional straight-edged rotational grooves. This curvature allows for gradual engagement and tighter fitting between the connecting tubes and ejaculatory tubes, eliminating gaps that would otherwise cause material leakage while maintaining ease of manufacture through standard molding techniques
Data Source
AI summary
In a mixing tip of an impression material cartridge, a top connective plate is on the center of the top of a pair of cylinders, with an impression material cartridge installed with the connecting end of each of a pair of mixing tips facing each other located on each side of the top connective plate, and a mixing screw inserted into a protruding mixing tube on the center of the upper part, with a connective structure of the mixing tips having protruding connecting wings on the lower side of the supporting structure, formed to achieve diagonal symmetry of a rotational bump on the end surface of the connecting wings on a lower supporting side of the mixing tips, and on the lower surface of the rotational bump, cylindrical guide pins that guide the connecting direction of the mixing tips are each formed to protrude towards the bottom.